CN1276862A - Structure of metallurgical furnace and operating method using same metallurgical furnace - Google Patents

Structure of metallurgical furnace and operating method using same metallurgical furnace Download PDF

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Publication number
CN1276862A
CN1276862A CN98810337A CN98810337A CN1276862A CN 1276862 A CN1276862 A CN 1276862A CN 98810337 A CN98810337 A CN 98810337A CN 98810337 A CN98810337 A CN 98810337A CN 1276862 A CN1276862 A CN 1276862A
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CN
China
Prior art keywords
furnace
refractory brick
heater
mentioned
refractory
Prior art date
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Pending
Application number
CN98810337A
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Chinese (zh)
Inventor
山中光弘
渡部雅之
关口毅
田口宪彦
岩崎克博
矶崎进市
川上正弘
泽田辉俊
木村明史
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JFE Engineering Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP9287189A external-priority patent/JPH11118361A/en
Priority claimed from JP9287188A external-priority patent/JPH11118360A/en
Priority claimed from JP29194097A external-priority patent/JPH11131115A/en
Priority claimed from JP33428497A external-priority patent/JPH11172310A/en
Priority claimed from JP33879897A external-priority patent/JPH11173428A/en
Priority claimed from JP1650698A external-priority patent/JPH11217612A/en
Priority claimed from JP1650798A external-priority patent/JPH11217613A/en
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of CN1276862A publication Critical patent/CN1276862A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B11/00—Making pig-iron other than in blast furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F27D2099/0081—Joint
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture Of Iron (AREA)

Abstract

A metallurgical furnace which comprises a furnace body shell, a bottom wall comprising lining bricks provided on an inner side of the furnace body shell, and a side wall comprising water-cooled metal panels provided on the inner side of the furnace body shell, wherein metal partitions are provided among the water-cooled metal panels, a furnace body comprises upper and lower vessels, which can be separated from each other, and which are provided therebetween with a seal means, a hot metal as a seed molten metal is introduced from a pan to a tap hole via an introduction passage, and a residual molten metal is discharged from an enlarged bottom-blown nozzle port.

Description

The structure of metallurgical furnace and the method for operating of this metallurgical furnace
Technical field
The present invention relates to the method for operating of structure and this metallurgical furnace of metallurgical furnace.
Background technology
Various furnace walls inner faces such as converter, electric furnace, fusion reducing furnace are generally constructed by refractory material.Yet the furnace wall of this refractory material is less in the part damage that is immersed in motlten metals such as molten steel, but serious with the part damage that contacts with high-temperature gas in the part that contacts with slag, needs to replace at short notice.For this reason, the countermeasure as improving the body of heater durability can be built into the part that is not immersed in motlten metal the metal system cooled plate that flows through cooling water in inside.
For example, the Japanese patent gazette spy opens the furnace wall structure that following such metallurgical furnace is shown for flat 4-316983 number.
(A) refractory walls of stove inboard is formed by refractory lining and cooled plate.
(B) between the refractory lining of cooled plate and institute's adjacency, separator is set.
(C) between cooled plate and body of heater iron sheet, the unshape refractory layer is set.
(D) separator is formed for pouring into a mould unshape refractory between cooled plate and body of heater iron sheet
Molding box.
(E) because cooled plate prevents the overheated of inner lining refractory block, so can improve the durable of body of heater
The property.
Open the installation constitution of the cooled plate in the metallurgical furnace that illustrates below disclosing in flat 4-316984 number the Japanese patent gazette spy.
(a) cooled plate is installed on the inwall of refining furnace partly.
(b) filling fire resisting material between cooled plate and body of heater iron sheet.
(c) all or part of of the top and bottom between cooled plate and body of heater iron sheet, side hidden by thin plate.
(d) even leak from cooled plate, water does not enter into molten metal yet.
Japanese patent gazette spy opens to disclose for flat 6-50669 number and holds the motlten metal refining vessel that motlten metal carries out refining.The refractory walls that is immersed in the scope of motlten metal in refining process is lined with refractory material.Part or all of this refractory walls upper end refractory walls is made of the interior cooling construction body of establishing cooling body.
Water cooling in prior technology plate as described above is made of the turning point in the water route of the feed water inlet of being located at the cooled plate bottom, the discharge outlet of being located at cooled plate top, the water route that reaches a plurality of horizontal directions between connection feed water inlet and the discharge outlet and horizontal direction.Cooling water enters from the feed water inlet, and rising in the 180 degree backs of water route turnover in the horizontal direction, discharges from the discharge outlet of being located at cooled plate top then.The water route of the cooling water of water cooling in prior technology plate so the pressure loss of cooling water increases, needs to improve the pressure of cooling water circulating pump owing to have the turning point of 180 degree, produces the problem that cost of equipment and operating cost uprise.
Japanese patent gazette spy opens flat 4-316983 number and the spy opens the occasion that a part that discloses in the furnace wall for flat 4-316984 number is provided with 1 cooled plate.When the occasion that cooled plate is set at stove Zhou Quanti, need arrangement that a plurality of cooled plate are set, yet above-mentioned two communiques do not have any record to the alignment arrangements cooled plate.
In addition, keeping continuously and making in the fixed scrap iron material calciner or smelting and rducing iron ores stove of the molten condition pig iron, remain in the temperature height of the temperature of the interior pig iron of stove or scrap iron material than blast furnace, and in order to promote reaction speed to carry out the strong mixing operation, so, the loss of the refractory brick of liner is serious, and the stove life-span is between the short-term of several weeks to several months.For this reason, in these bodies of heater,, very important with the remaining thickness of better precision assurance refractory brick in operation for stability that improves operation and the expense of considering refractory material.
In the fusion reducing furnace of so fixed scrap iron material melting furnace and iron ore, as measure the remaining thickness of inner lining refractory block with the method for thermocouple, coaxial cable or radioactive substance, following problem can take place.
In the method that adopts thermocouple, be limited to the scope that can infer remaining thickness by 1 secondary thermocouple, all need how secondary thermocouple at stove.In addition, under thermocouple and refractory brick state of contact, change, can not get enough mensuration precision by the detected temperature of thermocouple.
In the method that adopts coaxial cable, the remaining thickness of precision determination that can be good, but only be the information of imbedding the position of coaxial cable, in stove is all,, need more coaxial cable than thermocouple.
In the method that adopts radioactive substance, because according to having or not radioactive substance to measure, so need all imbed a plurality of radioactive substances at stove.In addition, the restriction when using radioactive substance aspect the safety and sanitation is many, and impracticable.
Like this, as will in the fusion reducing furnace of fixed scrap iron material melting furnace and iron ore, using the method for inferring the existing remaining thickness of refractory brick, at stove all with the remaining thickness of good precision determination refractory brick, then measure machine expense, measure machine and cost greatly improved in the setup fee of stove etc., uneconomical.
For the melting, reducing and smelting of iron, the smelting furnace of converter type fusion reducing furnace and these two kinds of forms of fixed fusion reducing furnace has been proposed.For example, open in flat 1-198414 number the Japanese patent gazette spy, disclose converter type fusion reducing furnace, in addition, in Japanese patent gazette 4-80311 number, disclose in the tap a blast furnace fixed fusion reducing furnace of furnace cupola shape in hole of furnace bottom setting by ball socketed bearing supporting body of heater central portion.
The melting, reducing and smelting of iron is the smelting of continuation mode, though not necessarily leave no choice but the Dumpage type smelting furnace that uses the converter type fusion reducing furnace such, but owing to keep high temperature liquid iron and high-temperature slag often, so the loss of the lower channel refractory material of bottom of furnace body is serious, as a result, the damage of the generations such as thermal deformation of lower channel iron sheet becomes serious.For this reason, as fusion reducing furnace, employing Dumpage type iron-smelting furnace of replaceable lower channel as essemer converter is favourable.
Yet in the Dumpage type smelting furnace of existing replaceable lower channel, when furnace shell was large-scale, the taking the weight of of toppling over support of gudgeon etc. increased, and in order to ensure the mechanical strength of support, equipment enlarging causes installation cost to increase.Maximization makes the configuration of other mill auxiliaries around the stove become difficult.
In addition, the increase of the installation cost that the furnace shell maximization of fixed iron-smelting furnace brings is compared very little with the Dumpage type iron-smelting furnace, but in the fixed iron-smelting furnace of prior art, as be disclosed in the Japanese patent gazette spy and open flat 4-80311 number, though the part of the furnace bottom of the installation portion of bottom blowing nozzle etc. is replaceable, it is all to change lower channel.Fettling refractory brick under this situation is demolished impaired refractory brick, takes out of impaired refractory brick, is moved into new refractory brick etc. and will take a lot of times, so and unrealistic.
Packing into and pre-installing in the method for molten iron for the operation that begins fusion reducing furnace, also having the method that in fusion reducing furnace, forms the prepackage molten iron by sources of iron such as spray oxygen fusing scrap iron material or pigs.Yet this method is owing to generating the significant FeO of refractory material erosion, so there is the danger of damage fusion reducing furnace inner lining refractory.
For this reason, identical with the occasion of Dumpage type body of heater, can consider to be provided with the method for the injection molten iron of peristome at the furnace roof of fixed body of heater.Yet, along week cooled plate being set entirely, the worry of damage cooled plate is arranged when injecting molten iron in the stove.In addition, the equipment that fusion reducing furnace carries out operation for the high pressure more than 0.2Mpa, so, the occasion of peristome is being set, need keeping the sealing of this part, behind the molten iron of packing into, in order to prevent that it from solidifying, several hrs with interior inaccessible peristome, confirm to begin very difficulty of operation after airtight.
In having the melting reduction method for iron ore of molten iron, the combustion heat fusing that is produced by carbon material such as coal or coke and oxygen is encased in flux such as iron ore on the molten iron and quick lime, continuously or off and on will reduce molten iron and the slag that this iron ore that has melted generates by the carbon material and be discharged to outside the stove.In the method, in order to promote reaction in furnace, need be blown into to stir from furnace bottom and use gas, take in addition in the stove of being everlasting and guarantee molten iron, the also molten iron of residual ormal weight in stove during discharge.For this reason, generally in furnace sidewall tapping hole is set, the molten iron of residual ormal weight carries out operation below tapping hole.
As reduction furnace, can use as can rotating Dumpage type body of heater and the fixed body of heater as blast furnace the essemer converter, exhaust and reach stove during the life-span at work refractory brick, as be the Dumpage type body of heater, dumpable body of heater, the residual melt that residues in interior molten iron of stove and slag formation can be discharged from the tapping hole of fire door or sidewall, but for fixed body of heater, must equally with blast furnace put cold make residual melt solidifying after, with its fragmentation, cut-out, be discharged to outside the stove again.For this reason, need long putting between cold period, stove is repaiied prolongation, and operating rate descends, and in addition, discharge operation equipment needed thereby, personnel become the reason that manufacturing cost rises.
As the means that address this problem, there is Japanese patent gazette spy for example to open flat 2-66110 number and specially opens the method that flat 3-253508 number disclosed tapping hole from furnace bottom discharged residual melt.
Disclose a kind of tapping hole locking device at Japanese patent gazette 2-66110 number, wherein,, in tapping hole, supplied with obstruction by the top blow oxygen lance that can in stove, move up and down and use sand, carried out the switching of tapping hole at the tapping hole that the furnace bottom setting is opened and closed by shutter door.In addition, Japanese patent gazette spy opens and discloses a kind of tapping hole structure for flat 3-253508 number, wherein, outlet at the tapping hole of being located at furnace bottom is provided with slide gate nozzle, and in stove, erect the refractory brick body is set, this refractory brick body is provided with tapping a blast furnace of linking to each other with this tapping hole and use stream in inside, tapping hole is entered the mouth is positioned at above the furnace bottom, thereby in stove the molten iron of residual ormal weight.
In Japanese patent gazette 2-66110 number owing to can tap a blast furnace from furnace bottom, so when reaching stove during the life-span, can discharge residual melt in the stove from tapping hole, but will be in stove when tapping a blast furnace usually the molten iron of residual ormal weight very difficult with the sealing tapping hole.Reason is that the refractory material of slide gate nozzle also just has the durability about 10 times at most.In addition, also there is the problem that in tapping hole, to supply with obstruction sand.
Open in flat 3-253508 number the Japanese patent gazette spy, stop up sand, the refractory brick body is set, so molten iron that will inevitably residual ormal weight owing in stove, erect though can in tapping hole, supply with.In addition, can discharge residual melt though destroy the upright refractory brick body of establishing, but need easily to destroy the material and the structure of the upright refractory brick body of establishing in this occasion, on the contrary, the loss of refractory brick body makes that the danger of the molten iron that can not guarantee the ormal weight in the operation usually is very big.
Like this, even tapping hole is set, in common operation, has the molten iron of residual ormal weight stably and can easily discharge very difficulty of such two functions of residual melt during the life-span reaching stove at the furnace bottom of fixed body of heater.
Disclosure of an invention
The invention provides a kind of method of operating that can reduce the metallurgical furnace of cost of equipment and operating cost simultaneously and adopt this metallurgical furnace.
In order to achieve the above object, the 1st invention of the present invention provides a kind of metallurgical furnace, and this metallurgical furnace comprises the body of heater iron sheet, be located at the sidewall of base wall that the inner lining refractory block of this body of heater iron sheet inboard constitutes and the metal system cooled plate formation of being located at this body of heater iron sheet inboard.
This metal system cooled plate preferably has the water route of the helical configuration that flows through cooling water.
The 2nd invention of the present invention provides a kind of cooled plate of being located at the metallurgical furnace sidewall, and this cooled plate comprises metal system cooled plate and water route, and this water route is located in this metal system cooled plate, flows through cooling water therein, and has helical configuration.
The 3rd invention of the present invention provides a kind of metallurgical furnace, this metallurgical furnace comprises body of heater iron sheet, furnace wall, metal system separator, reaches the unshape refractory layer, this furnace wall is made of the cooled plate of being located at this body of heater iron sheet inboard, this metal system separator is located between cooled plate and the cooled plate and is installed on the body of heater iron sheet, and this unshape refractory layer is located at the part of being surrounded by this cooled plate, separator and body of heater iron sheet.
This separator is preferably the wedge shape that section is narrowed down from body of heater iron sheet side.
The 4th invention of the present invention provides a kind of metallurgical furnace, this metallurgical furnace comprise be used to keep with the body of heater of making iron content motlten metal and slag, form the body of heater gabarit iron sheet, be disposed at motlten metal and body of heater that slag contact in perimembranous interior all refractory brick, and above-mentioned in the detection refractory brick outside all refractory brick, this interior all refractory brick is with MgO, Al 2O 3, graphite, SiC or SiO 2Be main composition, even this detection contains the also no problem and material that is easy to detect of liquate operation in motlten metal and the slag more than the 10wt% as the detection material with refractory brick.
Above-mentioned detection material, preferably using Cr is that oxide, Sr are that oxide, Zr are at least a material of selecting in the oxide.Above-mentioned detection preferably has the thickness of 30mm at least with refractory brick.
The 5th invention of the present invention provides a kind of metallurgical furnace, this metallurgical furnace comprises furnace body, support base, lowering or hoisting gear, position regulator, fixed mechanism, and upper slot supporting arrangement, this furnace body is made of upper slot and lower channel and is separable into upper slot and lower channel, this support base and above-mentioned lower channel are arranged at the below of above-mentioned furnace body with being connected, and it is all at the occasion supporting furnace body that connects upper slot and lower channel, this lowering or hoisting gear makes above-mentioned support base lifting, thereby upper slot is separated and fluid-tight engagement with lower channel, this position regulator be used to adjust and the support base that keeps having raise by above-mentioned lowering or hoisting gear in the position of vertical direction, this fixed mechanism is used for fixing the support base of having been adjusted the vertical direction position by above-mentioned position regulator, and this upper slot supporting arrangement is skyborne assigned position supporting upper slot when by above-mentioned lowering or hoisting gear furnace body being separated into two parts.
The 6th invention of the present invention provides a kind of metallurgical furnace lower channel replacing method with upper slot and lower channel, this method comprises following operation: furnace body and support base are provided, this furnace body is separable into upper slot and lower channel, and this support base is arranged at the below of furnace body with being connected with lower channel; Under the state by above-mentioned support base supporting furnace body, the releasing upper slot is connected with lower channel; Make and removed the support base decline that connects; In the process that above-mentioned support base descends, by the upper slot supporting arrangement upper slot is supported on aerial assigned position, separate upper slot and lower channel; From move the lower channel of having separated near the position of upper slot below; Near the position below the upper slot, dispose the new lower channel that is connected with support base; Support base is risen, upper slot with new lower channel fluid-tight engagement be connected.
The 7th invention of the present invention provides a kind of flange seal device that is used for metallurgical furnace, the sealing device by pair of flanges, sealing surface member, and at least two containment members form, the sealing surface member is installed at least one side's of above-mentioned pair of flanges sealing surface, these at least two containment members in order between above-mentioned sealing surface member and flange seal face in opposite directions or sealing surface member, to remain airtight conditions between the two along flange arranged radially setting.
Above-mentioned containment member is tubular seal preferably.This sealing device is arranged at flange part, but is not limited only to this, also can be arranged at the weld part of hermetic unit.
The 8th invention of the present invention provides a kind of metallurgical furnace, this metallurgical furnace comprises body of heater, is arranged at the tapping hole of above-mentioned body of heater bottom, accept from casting ladle the molten iron made in advance tundish, and from above-mentioned tundish molten iron is imported to the molten iron introduction channel of tapping hole for the molten iron of toward metallurgical furnace in, packing into, as pre-installing molten iron (kind soup).
The 9th invention of the present invention provides a kind of method of operating of metallurgical furnace, and this method of operating comprises following operation: be blown into stirring gas from the bottom blowing nozzle more than at least 1 of being located at furnace bottom toward molten iron; Discharge molten iron from the tapping hole of being located at furnace sidewall; To stir from least 1 above-mentioned bottom blowing nozzle and switch to oxygen-containing gas with gas and be blown into, the refractory material around the fusing bottom blowing nozzle enlarges the aperture, discharges the residual molten iron in the stove from the hole that has enlarged.
Above-mentioned stirring also can be blown into molten iron from furnace bottom sidewall nozzle nearby with gas.Above-mentioned stirring also can be blown into from bottom blowing nozzle more than at least 1 and sidewall nozzle both sides with gas.
The method of operating of above-mentioned metallurgical furnace also can have the detection operation that is detected the remaining length of above-mentioned bottom blowing nozzle by detecting sensor.
The simple declaration of accompanying drawing
Fig. 1 is the cooled plate vertical section synoptic diagram that the example of the invention process form 1 is shown.
Fig. 2 is another routine cooled plate vertical section synoptic diagram that the invention process form 1 is shown.
Fig. 3 is another routine cooled plate vertical section synoptic diagram that the invention process form 1 is shown.
Fig. 4 is another routine cooled plate vertical section synoptic diagram that the invention process form 1 is shown.
Fig. 5 is another routine cooled plate vertical section synoptic diagram that the invention process form 1 is shown.
Fig. 6 is the section synoptic diagram of fusion reducing furnace that is provided with the cooled plate of the invention process form 1.
Fig. 7 is the vertical section synoptic diagram that water cooling in prior technology plate water route structure is shown.
Fig. 8 is the section synoptic diagram of fusion reducing furnace that is provided with the cooled plate of the invention process form 2.
Fig. 9 is the synoptic diagram of the water-cooled board of Fig. 8 of seeing from the stove inboard.
Figure 10 is the vertical section synoptic diagram of the water-cooled board of Fig. 8.
Figure 11 is illustrated in the skiagraph that to be ready pulling down the state before the cooled plate in the metallurgical furnace of the cooled plate with the invention process form 2.
Figure 12 is illustrated in the skiagraph of having pulled down the state of cooled plate in the metallurgical furnace of the cooled plate with the invention process form 2.
Figure 13 is illustrated in the skiagraph that the state of new cooled plate is set in the metallurgical furnace of the cooled plate with the invention process form 2.
Figure 14 is the side section skeleton diagram of fixed body of heater that 1 example of the invention process form 3 is shown.
Figure 15 is the flat section skeleton diagram that sidewall of the furnace body portion refractory brick that the embodiment 1 of the invention process form 3 is shown is piled up structure.
Figure 16 is the flat section skeleton diagram that sidewall of the furnace body portion refractory brick that the embodiment 2 of the invention process form 3 is shown is piled up structure.
Figure 17 is the plane skeleton diagram of form of implementation example that the fixed smelting furnace of the invention process form 4 is shown.
Figure 18 is the vertical section skeleton diagram of the X-X face of Figure 17, and the state that connects upper slot and lower channel is shown.
Figure 19 is the vertical section skeleton diagram of X-X face among Figure 17, and the state of having pulled down lower channel is shown.
Figure 20 is the vertical section skeleton diagram of the Y-Y face of Figure 17.
Figure 21 is the vertical section skeleton diagram of the Z-Z face of Figure 17.
Figure 22 is the sectional drawing that a form of implementation of the invention process form 5 is shown.
Figure 23 is the key diagram of the state when being illustrated in the distortion of the invention process form 5 flange.
Figure 24 is a key diagram of changing the replacing of revising deformation element when being illustrated in the distortion of the invention process form 5 flange.
Figure 25 is the key diagram of fusion reducing furnace that an example of the invention process form 6 is shown.
Figure 26 is the sectional drawing that illustrates along the molten iron introduction channel structure of the A-A line of Figure 25.
Figure 27 illustrates the perspective view of the tapping hole structure of the invention process form 6.
Figure 28 is the anti-perspective view that peels off an enforcement state of structure that the tapping hole of the invention process form 6 is shown.
Figure 29 is the anti-perspective view that peels off another enforcement state of structure that the tapping hole of the invention process form 6 is shown.
Figure 30 is the side section skeleton diagram of fixed body of heater that 1 example of the invention process form 7 is shown.
Figure 31 is the expanded view of the bottom blowing spray nozzle part of Figure 30.
Figure 32 is for the reduction of bottom blowing nozzle temperature, bottom blowing nozzle length that the embodiment of the invention process form 7 is shown by time series and be blown into the figure of the back pressure measured value of oxygen.
The optimised form form of implementation 1 that carries out an invention
The water route of the cooled plate of form of implementation 1 structure is characterised in that: this water route is configured to be arranged at the metallurgical furnace sidewall, the water route of the metal system cooled plate that cooling water flows through is constructed, and above-mentioned water route is a screw type.
Represent by (1) formula to the water route pressure loss of outlet from the feed water inlet of cooled plate.ΔP＝[(ζ+λ×L/D)×γ×V 2]/(2×g×10000)…… (1)
In formula (1), Δ P is the pressure loss (kgf/cm in water route 2), ζ is the loss coefficient (-) of turning point, water route, and λ is the coefficient of friction (-) of water route line part, and L is the length overall (m) of water route line part, and D is the equivalent diameter (m) in water route, γ is cooling water proportion (kgf/cm 3), V is the flow velocity (m/sec) of cooling water, g is acceleration of gravity (m/sec 2).
Here, the loss coefficient ζ of turning point, water route is the summation of the loss coefficient ζ i of each turning point, water route, the loss coefficient ζ of the turning point of 180 degree 1In each position is the loss coefficient ζ of the turning point of 2.42,90 degree 2In each position is 0.965, compares with the turning points of 90 degree in the pressure loss of 180 turning points of spending and increases to 2.5 times.In addition, when the turning point increased, the pressure loss Δ P in water route was subjected to the influence of the pressure loss at turning point place very big.
In form of implementation 1, because the water route of cooled plate is configured to the screw type from the outer circumferential side of cooled plate to central side, by water the number of turning point increase, the major part of turning point is 90 little degree turning points of loss coefficient, reduce the turning point of 180 degree, and the length overall L of water route line part is constant, so the pressure loss in water route reduces Δ P on the whole.
Form of implementation 1 is described below with reference to the accompanying drawings.Fig. 1～Fig. 5 is the vertical section synoptic diagram of cooled plate that the example of form of implementation 1 is shown.
In the drawings, the width of metal cooled plate 1 is W, highly is H, and Fig. 1～cooled plate 1 example shown in Figure 5 illustrates same size, and in addition, cooled plate 1 is preferably the copper foundry goods of good heat conductivity.Be provided with feed water inlet 3 and discharge outlet 4 in cooled plate 1, be provided with the water route 2 of screw type in the inside of cooled plate 1,3 cooling waters of supplying with are discharged from discharge outlet 4 by water route 2 from the feed water inlet.The width d in water route 2 is a certain value.
Cooled plate 1 shown in Figure 1 is provided with feed water inlet 3 and discharge outlet 4 at the central side of cooled plate 1, so cooling water flows through water route 2 arrival outer circumferential sides from the central side of cooled plate 1 with helical form, flows through water route 2 from outer circumferential side with helical form in outer circumferential side counter-rotating back and arrives central sides.The turning point of this cooled plate 1 is made of two 180 degree turning points and 14 90 degree turning points.
Cooled plate 1 shown in Figure 2 has been arranged side by side feed water inlet 3 and outlet 4 at the periphery side lower part, so cooling water flows to central side from outer circumferential side, after the central side counter-rotating, turns back to outer circumferential side from central side.The turning point of this cooled plate 1 is made of two 180 degree turning points and 16 90 degree turning points.
Cooled plate 1 shown in Figure 3 is provided with feed water inlet 3 at the periphery side lower part, is provided with discharge outlet 4 at central side, so cooling water flows to central side from the outer circumferential side of cooled plate 1 with helical form.The turning point of this cooled plate 1 is made of 1 180 degree turning point and 17 90 degree turning points.
Cooled plate 1 shown in Figure 4 is provided with feed water inlet 3 at the periphery side lower part, is provided with discharge outlet 4 at the periphery upper lateral part, so cooling water flows to central side from the outer circumferential side of cooled plate 1 with helical form.After the central side counter-rotating, turn back to outer circumferential side with helical form from central side.The turning point of this cooled plate 1 is made of two 180 degree turning points and 15 90 degree turning points.
Cooled plate 1 shown in Figure 5 is provided with feed water inlet 3 and discharge outlet 4 at the two ends of periphery side lower part, the turning point is made of two 180 degree turning points and 15 90 degree turning points.
In these cooled plate 1, also can cooling water be flowed in the opposite direction feed water inlet 3 and discharge outlet 4 exchanges.In addition, central point that can also cooled plate 1 is that axle returns turnback or is the minute surface symmetry.In order to reduce the pressure loss in water route 2,180 degree turning points are preferably in two positions in 1 cooled plate 1.
In form of implementation 1 of the present invention, water route 2 is a screw type, so need make the width W of cooled plate 1 and height H all is the integral multiple of water route width d, can and width W and the height H that scope pre-determines best cooled plate 1 be set according to the metallurgical furnace size that cooled plate 1 is installed.
Section synoptic diagram when Fig. 6 is arranged at the smelting and rducing iron ores stove for the cooled plate 1 with the invention process form 1.In the drawings, the inner face of body of heater iron sheet 6 has molten iron 9 and slag 10 by the fusion reducing furnace 5 that inner lining refractory block 7 and cooled plate 1 constitute in inside, be blown into the oxygen reduction iron ore from top blow oxygen lance 8.As shown in Figure 6, cooled plate 1 is not directly arranged setting along the stove Zhou Quanti at place, slag 10 locations contiguously with molten iron 9.In addition, cooled plate 1 is installed on body of heater iron sheet 6 by the bolt (not shown).
Like this, in form of implementation 1 of the present invention, the water route 2 of cooled plate 1 is a screw type, thus can make the pressure loss Δ P in water route 2 very little, thus reduce cost of equipment and operating cost.In addition, be in cooled plate 1, can prolong the life-span of fusion reducing furnace 5 significantly by making the position that contacts with high-temperature slag 10.
Metallurgical furnace is not limited to fusion reducing furnace 5, in electric furnace or converter the cooled plate 1 of the invention process form 1 can be set also, and in addition, the structure in water route 2 is not limited to said circumstances, as long as be screw type, adopts what structure can.
The following describes the embodiment that cooled plate shown in Figure 1 is arranged at fusion reducing furnace shown in Figure 6.Cooled plate is a copper casting, and in the size of 1 cooled plate, width W is 1050mm, and height H is 1200mm, and thickness is 90mm.In the size in water route, section is a rectangle, and the width d of this section is 54mm, and the degree of depth is 40mm, and the length overall L of line part is 12.69m, and equivalent diameter D is 0.0456m.Flow velocity V is 7m/sec in the water route of cooling water, and flow is 54m 3In addition,, use the cooled plate of the water route structure that is shown in the prior art among Fig. 7, cooling water is flow through for the comparative pressure loss.The cooled plate of the type of prior art is made of 11 180 degree turning points.
If the loss coefficient ζ of 180 degree turning points 1In each position is the loss coefficient ζ of 2.42,90 degree turning points 2In each position is 0.965, and the coefficient of friction λ of water route line part is 0.02386, and cooling water weight/power ratio γ is 1000kgf/cm 3, gravity acceleration g is 9.8m/sec 2, it is updated to calculates pressure loss Δ P in the formula (1).By the calculating formula of formula (2) expression cooled plate of the present invention, by the calculating formula of formula (3) expression water cooling in prior technology plate.ΔP＝[(2.42×2+0.965×14+0.02386×12.69/0.0456)×1000×7 2]/(2×9.8×10000)＝6.24(kgf/cm 2) … (2)ΔP＝[(2.42×11+0.02386×12.69/0.0456)×1000×7 2]/(2×9.8×10000)＝8.31(kgf/cm 2) … (3)
Like this, in the cooled plate of form of implementation 1 of the present invention, pressure loss Δ P is 6.24kgf/cm 2, in the cooled plate of prior art type, pressure loss Δ P is 8.31kgf/cm 2
Like this, can be to per 1 cooled plate with the power minimizing 7kW of cooling water circulation with pump.In addition, the durability of cooled plate is not seen difference to the present invention's product and the product that have now.
In form of implementation 1 of the present invention, be installed on various metallurgical furnaces the furnace wall cooled plate the water route be configured to screw type, so, can reduce the pressure loss in water route, the result can reduce cost of equipment and operating cost simultaneously.Form of implementation 2
The installation constitution of the cooled plate of metallurgical furnace is characterised in that: when when the arrangement of metallurgical furnace furnace wall is provided with a plurality of cooled plate, between cooled plate and cooled plate, metal separator installed and be set to the body of heater iron sheet, and in the scope that surrounds by cooled plate and separator and body of heater iron sheet, unshape refractory is set.
The section of separator is preferably from the wedge shape of body of heater iron sheet side stenosis in stove.
Because each cooled plate is isolated by the metal system separator that is installed on the body of heater iron sheet, in addition, filling is also separated by separator with unshape refractory layer between the body of heater iron sheet in cooled plate, so, can only change as the cooled plate of target and do not damage other cooled plate and be arranged at other cooled plate and the body of heater iron sheet between the unshape refractory layer.In addition, owing to separator is made of metal, so can be damaged because of changing operation.
By the wedge shape of section that makes separator in stove, narrowing down from body of heater iron sheet side, can easily take out the unshape refractory layer, promptly carry out the replacing operation of cooled plate.
The present invention is described below with reference to the accompanying drawings.Fig. 8 is the section synoptic diagram that the smelting and rducing iron ores furnace operating state that is provided with cooled plate of the present invention is shown, and Fig. 9 is for watching the synoptic diagram of the water-cooled board of Fig. 8 in stove, and Figure 10 is the vertical section synoptic diagram of the water-cooled board of Fig. 8.
In these figure, construct the fusion reducing furnace 101 of body of heater iron sheet 102 inner faces by inner lining refractory block 103 and copper cooled plate 104, have molten iron 106 and slag 107 in inside, be blown into the oxygen reduction iron ore from top blow oxygen lance 105.
Cooled plate 104 is not directly arranged setting along the stove Zhou Quanti of slag 107 locations contiguously with molten iron 106, and the configuration of cooled plate 104 longitudinally is divided into 4 grades, cooled plate 104 width (W) that stagger respectively at different levels half, becomes so-called interconnected.
By the inner face that is welded on body of heater iron sheet 102 metal system separator 108 is installed, is being surrounded positions on every side, by the fixing cooled plate 104 of the bolt 110,110 of perforation body of heater iron sheet 102 and nut 111,111 by this metal system separator 108.In the scope that surrounds by cooled plate 104, separator 108 and body of heater iron sheet 102, the unshape refractory layer 109 of unshape refractory that formed filling.Cooled plate 104 makes cooling water flow cool off to inside by water supply piping 112 and the drainage piping 113 that connects body of heater iron sheet 102.Unshape refractory layer 109 is by forming from the hand-hole 114 cast unshape refractories of having pulled down hand-hole bolt 115.By such installation, cooled plate 104 and cooled plate 104a, 104b isolation up and down, in addition, also with up and down unshape refractory layer 109a, 109b separate unshape refractory layer 109.
Separator 108 is made by steel or stainless steel, the wedge shape of its section configuration for narrowing down in stove from body of heater iron sheet 102 sides.In Figure 10, constitute wedge shape by making up 2 flat steel discs, but also can or adopt the wedge shape steel bad 1 plain plate bending.The length of protruding from body of heater iron sheet 2 (L) of separator 108 is to surpass the length of cooled plate 104 in the face position of body of heater iron sheet 102 sides, is being connected with other unshape refractory layer 109 up and down to prevent unshape refractory layer 109.Yet the length of protrusion (L) there is no need the length into the face that surpasses cooled plate 104 stove inboards, also can be in the face of the stove inboard of cooled plate 104.In addition, not necessarily leave no choice but with body of heater iron sheet 102 separator 108 is installed by welding, also can be by other installation method bolt etc. for example.
Though the border in inner lining refractory block 103 and cooled plate 104 is provided with separator 108, this separator 108 only forms at the face of cooled plate 104 sides, and the face that joins with inner lining refractory block 103 is the plane, supporting inner lining refractory block 103.
Below, the replacing method of cooled plate 104 is described according to Figure 11～Figure 13.Figure 11 illustrates the figure that is about to pull down cooled plate 104 state before, as shown in figure 11, at first cut off water supply piping 112 and drainage piping 113 in the outside of body of heater iron sheet 102, and pull down nut 111,111 and hand-hole bolt 115,115, next insert the instrument 116 that is installed on pneumatic hammer etc. from hand-hole 114, fragmentation is cut and is got unshape refractory layer 109.Afterwards, pull down cooled plate 104 towards the stove inboard.
Figure 12 illustrates the figure that takes off the state after the cooled plate 104, as shown in figure 12, removes unshape refractory layer 109 from separator 108 and body of heater iron sheet 102, reduces the residual quantity of unshape refractory layer 109 as much as possible.Residual quantity for a long time, the unshape refractory layer 109 of next time becomes fragile, the situation variation.
Figure 13 is the figure that the state of resetting cooled plate 104 is shown, as shown in figure 13, make from the stove inboard bolt 110,110, and water supply piping 112, drainage piping 113 penetrate into body of heater iron sheet 102, cooled plate 104 is installed.Next, by the fixing cooled plate 104 of nut 111,111,, form unshape refractory layer 109 from hand-hole 114 cast unshape refractories.Afterwards, hand-hole bolt 115,115 is installed, and is connected water supply piping 112 and drainage piping 113, finish the replacing operation.
Like this, by the replacing operation of cooled plate 104, can only change as the cooled plate 104 of target and do not damage other cooled plate 104a, 104b or other unshape refractory layer 109a, 109b.
In the above description, though be cooled plate 104 to be set at fusion reducing furnace 101, but also can use the present invention by method described above at electric furnace or converter, in addition, though being configured to of cooled plate 104 is interconnected, but be not limited to interconnectedly, dispose for example go dish grid, also can implement the present invention and do not have problems for other.In addition, the installation method of the shape of cooled plate 104 and cooled plate 104 and body of heater iron sheet 102 etc. is not limited to above-mentioned explanation, as long as function is identical, surely not hinders use of the present invention.
The present invention is provided with the metal system separator that is installed on the body of heater iron sheet between cooled plate and cooled plate, so, when changing cooled plate, can only change as the cooled plate of target and do not damage other cooled plate or other unshape refractory layer, as a result, can repair with lower expense at short notice.Form of implementation 3
The refractory brick of the body of heater of this form of implementation 3 is piled up structure and is characterised in that, for the refractory brick that keeps and make the refractory brick structure of the fixed body of heater of iron content motlten metal continuously, be disposed at the interior week that contact with motlten metal and slag is with MgO, Al 2O 3, graphite, SiC or SiO 2Be more than a kind or 2 kinds of refractory brick of main composition, even there is not operational problem in liquate to motlten metal and slag yet outside it, and configuration contains the above easy detection material of 10wt% to use the refractory brick of material as detection.
It is that oxide, Sr are that oxide, Zr are one or more the material among the group that constitutes of oxide that detection is preferably Cr with material.Contain the refractory brick that detects with material and preferably have the above thickness of 30mm.In addition, the refractory brick of body of heater is piled up structure and is preferably 3 layers of refractory brick and piles up structure, and wherein, being disposed at, the refractory brick in interior week is 1 layer, containing the refractory brick that detects with material is 1 layer, 1 layer of refractory brick of configuration between refractory brick that contains detection usefulness material and body of heater iron sheet.
In this form of implementation 3, adopt fixed body of heater as continuous maintenance and the body of heater of making the iron content motlten metal.By using fixed body of heater, compare with the such Dumpage type body of heater of converter and can reduce cost of equipment, reduce the constant expense of manufacturing cost.In addition, can make the furnace wall portion of the furnace wall portion that contacts with slag and top thereof be the metal system cooled plate longer, reduction refractory material cost than refractory life.
Body of heater is piled up structure for the refractory brick more than at least 2 layers, be configured in body of heater in the refractory brick (below be designated as " interior all refractory brick ") in interior week of contacting with slag of the motlten metal that keeps be the general refractory brick that uses when keeping the iron content motlten metal, this refractory brick is with MgO, Al 2O 3, graphite, SiC or SiO 2It is main composition.Interior all refractory brick according to the position of body of heater can be respectively by being the refractory brick of main composition with for example MgO and being that the refractory brick of main composition forms liner with SiC.In its outside is body of heater iron sheet side, use material as detecting, and dispose such refractory brick (to call " detect and use refractory brick " in the following text), also no problem even this refractory brick liquate is operated in motlten metal and the slag, and, be easy to detection.The material that is easy to detect of the present invention is not contained in the raw material that is used for making ferrous metal with the form of impurity basically, nor is contained in interior all refractory brick.
When the body of heater that uses this refractory brick to pile up structure was operated, interior all refractory brick exposed the detection refractory brick that is positioned at its outside the most at last by motlten metal or slag loss.The detection of exposing is the same as with interior all refractory brick motlten metal or slag loss with refractory brick, detect with the material liquate in motlten metal and in the slag, when the detection of sampling detection motlten metal or slag is with the material amount from motlten metal or slag, nd detection material during keeping motlten metal and slag by interior all refractory brick, exposing with loss with refractory brick with detection becomes detectable state.Like this, according to detecting in the melting metal or in the slag moment of detecting with material, can recognize that the interior all refractory brick in somewhere has exhausted this situation in the body of heater.
Detect with the detection of refractory brick and use the material amount more than 10wt%, be preferably in more than the 20wt%.Usually, the analysis limit of ferrous metal and the slag that produces when making this metal is 10-3wt%, so, as detect with material in motlten metal or in the molten slag not liquate to then not detecting more than the analysis limit value.Use material by making detection contain to detect more than the 10wt%, in the waste that detects usefulness refractory brick after a little while, can detect to detect and use material, prevent that in advance molten metal from spilling the generation of accident with refractory brick.As detect amount with material more than 20wt%, it is easier then to detect.
Detect and use material, preferably using Cr is that oxide, Sr are that oxide, Zr are oxide.Cr 2O 3, SrO, ZrO 2Even it is also no problem fully in the operation in iron content motlten metal and the slag Deng the oxide liquate, in addition, basically be not contained in the raw material of making the iron content motlten metal with the form of impurity, be not contained in interior above-mentioned all refractory brick basically yet, therefore, by detecting these elements in motlten metal or in the slag, can positively hold interior all firebrick loss and expose this situation of refractory brick of using that detects.
These oxides are stable compound, and the treatment temperature that has than iron content motlten metal is 1200 ℃～1800 ℃ much higher high-melting-points, Cr 2O 3, ZrO 2As the refractory brick material, in addition, SrO has and MgO, CaO, and the oxide of the alkaline earth metal of the identical performance of BaO cardinal principle, does not have the such toxicity of BaO, and inexpensive Deng.Even any amount in these oxides of containing in refractory brick is more than 10wt%, it is also high that the refractory of refractory brick decreases property, has the inferior refractory of interior all refractory brick that uses unlike the present invention and decrease property, is suitable as most to detect and uses material.
Detection is preferably disposed with the thickness more than the 30mm with refractory brick.Even detect and to expose with refractory brick, detecting refractory with refractory brick, to decrease property also far short of what is expected unlike interior all refractory brick, therefore, though the durability of body of heater do not descend a lot, owing to having 10 as described above -3The analysis limit of wt%, so, do not expose with refractory brick as detecting in scope to a certain degree, then can not detect to detect and use material.As therebetween the detection surplus with the loss of refractory brick, the detection of configuration, is preferably in more than the 50mm more than 30mm with the thickness of refractory brick.
In addition, preferably adopt 3 layers of refractory brick to pile up structure, interior all refractory brick and detection respectively are 1 layer respectively with refractory brick, dispose 1 layer of refractory brick again between detecting with refractory brick and body of heater iron sheet.Because interior all refractory brick and detection respectively are 1 layer respectively with refractory brick, so, even these refractory brick cause the thickness attenuation because of loss, can not peel off and come off yet, can give play to the durability of the script that these refractory brick have, therefore, the life-span of body of heater can not become very short.Ferrous metal of the present invention is molten iron, steel, ferroalloy and alloyed iron.
This form of implementation 3 is described below with reference to the accompanying drawings.Figure 14 illustrates the smelting and rducing iron ores of 1 example of the invention process form with the schematic diagram of the side section of fixed body of heater.
In the drawings, fusion reducing furnace 201 is fixed on basis 216 by supporting station 215, the periphery of this fusion reducing furnace 201 is a body of heater iron sheet 202, the bottom in this body of heater iron sheet 202 from the inboard towards body of heater iron sheet 202 by interior all refractory brick 203, detect with refractory brick 204, and 3 layers of refractory brick of order formation of permanent refractory brick 205 pile up structure.The position of piling up structure at these 3 layers of refractory brick keeps molten iron 206 and slag 207.On the top of the body of heater iron sheet 202 of the sidewall that becomes fusion reducing furnace 201, be provided with the pipeline 213 that is connected with dust arrester (not shown) or preparation reduction furnace (not shown), the raw material input port 214 that is used for base feed in stove.In addition, connect top cover body of heater iron sheet 202 top blow oxygen lance 208 can be set up or down, the oxygen of can jetting in the stove.
Furnace bottom at fusion reducing furnace 201 is provided with gas hole 210 with air supply pipe 211 with being connected, and this gas hole is used for being blown into the waste gas etc. of inert gas or fusion reducing furnace 201 as stirring gas to molten iron 206.In addition, the tapping hole 212 of filling by mud material 217 in the construction location setting of 3 layers of refractory brick of sidewall.3 layers of refractory brick of the sidewall of fusion reducing furnace 201 pile up structure above, interior week the metal system cooled plate 209 that is made of copper and copper alloy is installed in body of heater iron sheet 202.Metal system cooled plate 209 can be used to replace refractory material for the durability height of slag 207.
The interior all refractory brick 203 that contacts with molten iron 206 and slag 207 is with MgO, Al 2O 3, graphite, SiC or SiO 2Be the refractory brick of main composition.Specifically, from MgO dolomite brick, MgO-graphite brick, Al 2O 3-graphite brick, high Al 2O 3Refractory brick, Al 2O 3The material that suitable selection such as-SiC-graphite brick, graphite brick, SiC refractory brick, fitros (ロ-stone matter) refractory brick, refractory fireclay block, silicon refractory brick conforms to application target.At this moment, can also can be provided with a kind according to branch the multiple of these refractory brick that be arranged in place is set comprehensively.As the fusion reducing furnace 1 of iron ore, judge from durability, preferably adopt Al 2O 3-SiC-graphite brick and MgO-graphite brick etc.
Detect with refractory brick 204 and detect above refractory brick,, and be not contained in substantially in the production of raw material for use of interior all refractory brick 203 and molten iron 206 even this detects and operates also no problemly with the material liquate to molten iron 206 and slag 207 with material 10wt% for containing.The implication that interior all refractory brick 203 and production of raw material for use do not comprise substantially is to contain by the form trace of impurity.Even interior all refractory brick 203 and production of raw material for use contain slight amount as impurity, the melting loss that detects with refractory brick 204 also can create a difference in assay value, thereby can hold the loss that detects with refractory brick 204.
Use material as this detection, preferably use Cr be oxide, Sr be oxide, and Zr be oxide.As the refractory brick that contains these oxides, specifically, use MgO-Cr 2O 3Refractory brick, SrO-Cr 2O 3Refractory brick, SrO-graphite brick, ZrO 2-SiO 2Refractory brick, ZrO 2-Cr 2O 3Refractory brick etc.As divide to be provided with at the stove inner region contain these Cr be oxide, Sr be oxide, and Zr be the refractory brick of oxide, then also different with the detection material that difference detected at the loss position of interior all refractory brick 203, so can hold the loss position of interior all refractory brick 203.
Because permanent refractory brick 205 does not directly contact molten iron 206 or slag 207, so refractory damage property also can be used than the material of interior all refractory brick 203 differences.Specifically, use MgO refractory brick or refractory fireclay block, when changing refractory brick, re-use.
Supply with iron ore, coal, quick lime from raw material input 214 toward this fusion reducing furnace 1, reach light dolomite, be blown into oxygen from top blow oxygen lance 208 then, be blown into inert gases such as hole 210 nitrogen from gas, smelting reduction of ion ores is made molten iron 206.Guarantee that molten iron 206 is ormal weight, and between the metal system of arrival cooled plate 209, open tapping hole 212, molten iron 206 and slag 207 are discharged to maintenance container (not shown).After the discharge, once more mud material 217 is filled into tapping hole 212, stops to discharge, continue operation.
Then, take assay sample, analyze the detection material in molten iron 206 or the slag 207 from the molten iron 206 and the slag 207 of discharging.Analytical method is machine analyses such as chemical analysis, x-ray fluorescence analysis or ICP.Use material as detecting in molten iron 206 or in the slag 207 to detect, then the interior all refractory brick 203 in the somewhere in fusion reducing furnace 201 exhausts, exposes detection refractory brick 204 as can be known.As detect to detect and use material, then stop the operation of fusion reducing furnace 201, the replacing operation of enforcement refractory brick.
Like this, do not use special sensor can positively hold interior all refractory brick 203 and exhaust this situation.In addition, no matter what part loss of interior all refractory brick 203 also can detect this loss.
Illustrated that above fixed body of heater is a smelting and rducing iron ores stove 201, but fixed body of heater is not limited to fusion reducing furnace 201, also applicable to the scrap iron melting furnace that is blown into oxygen continuous melting scrap iron material, be blown into oxygen with coke reduction Ni ore or Cr ore with the Fe-Ni alloy of making molten condition and the iron-smelting furnace of Fe-Cr alloy.When making the Fe-Cr alloy,, be that oxide or Zr are oxide so use Sr owing to can not be that oxide is used material as detecting with Cr.In addition, being illustrated though pile up structure with 3 layers of refractory brick, even be interior all refractory brick 203 and detect with 2 layers of refractory brick of refractory brick 204 and construct, or is that refractory brick more than 3 layers is piled up structure, in enforcement of the present invention without any problem.
Embodiment 1
In fusion reducing furnace 201 shown in Figure 14, as the MgO-graphite brick interior all refractory brick 203 is set to the thickness of 900mm, as detecting, the MgO-Cr of thick 150mm is set respectively with 3 branches such as grade along the circumferencial direction of stove with refractory brick 204 2O 3 Refractory brick 204a, SrO-graphite brick 204b, and SrO-Cr 2O 3Refractory brick 204c.At the MgO refractory brick of the thick 150mm of its arranged outside as permanent refractory brick 205.The diameter of body of heater iron sheet 202 is 10m.In Figure 15, the flat section skeleton diagram of the sidewall of the furnace body portion of this refractory brick structure is shown.
If the oxygen quantity delivered of top blow oxygen lance 208 is 75000Nm 3/ Hr, the iron ore quantity delivered is 190ton/Hr, and the coal quantity delivered is 100ton/Hr, and the quick lime quantity delivered is 4ton/Hr, and the light dolomite quantity delivered is 4ton/Hr, with this understanding iron ore is carried out melting and reducing.As a result, molten iron 206 is with the speed manufacturing of 125ton/Hr, from tapping hole 212 molten iron 206 that generates and slag 207 is discharged to molten iron and keeps in the container in per 2 hours.When the Cr amount of the molten iron 206 of discharging and slag 207 and Sr amount being analyzed, proceed operation by icp analysis.
After beginning operation 70 days, the Cr content in the molten iron 206 rises, and reaches 0.02wt%, so, stopped operation.The Sr amount that reaches in the slag 207 in molten iron 206 be can't see variation.Then, stove is disintegrated, observe the loss state in the stove.The observed result of the loss state of refractory brick is shown among Figure 15 with dotted line.
Shown in the dotted line among Figure 15, interior all refractory brick 203 of side wall portion disappears MgO-Cr 2O 3 Refractory brick 204a exposes 20m 2About, its waste is about 20mm.Yet remaining at other position have interior all refractory brick 203, SrO-graphite brick 204b and a SrO-Cr 2O 3 Refractory brick 204c is still very sound.
Embodiment 2
In fusion reducing furnace 201 shown in Figure 14, the thick MgO-graphite brick of 900mm is set as interior all refractory brick 203, the ZrO of thick 150mm is set with 2 branches such as grade along the circumferencial direction of stove 2 Refractory brick 204d and ZrO 2-Cr 2O 3 Refractory brick 204e is as detecting with refractory brick 204.At the MgO refractory brick of the thick 150mm of its arranged outside as permanent refractory brick 205.The diameter of body of heater iron sheet 205 is 10m.Figure 16 illustrates the plane cross section skeleton diagram that this refractory brick is piled up the sidewall of the furnace body portion of structure.
If the oxygen quantity delivered of top blow oxygen lance 208 is 75000Nm 3/ Hr, the iron ore quantity delivered is 190ton/Hr, and the coal quantity delivered is 100ton/Hr, and the quick lime quantity delivered is 4ton/Hr, and the light dolomite quantity delivered is 4ton/Hr, with this understanding iron ore is carried out melting and reducing.As a result, molten iron 206 is with the speed manufacturing of 125ton/Hr, from tapping hole 212 molten iron 206 that generates and slag 207 is discharged to molten iron and keeps in the container in per 2 hours.When the Zr amount of the molten iron 206 of discharging and slag 207 and Cr amount being analyzed, proceed operation by icp analysis.
After beginning operation 70 days, the Zr content in the molten iron 206 rises, and is converted into ZrO 2Then reach 0.02wt%, so, operation stopped.The Cr amount that reaches in the slag 207 in molten iron 206 be can't see variation.Then, stove is disintegrated, observe the loss state in the stove.The observed result of the loss state of refractory brick is shown among Figure 16 with dotted line.
Shown in the dotted line among Figure 16, interior all refractory brick 203 of side wall portion disappears ZrO 2 Refractory brick 204d exposes 10m 2About, its waste is about 15mm.Yet remaining at other position have interior all refractory brick 3, a ZrO 2-Cr 2O 3 Refractory brick 204e is still very sound.
According to this form of implementation 3, keeping continuously and making in the fixed body of heater of iron content motlten metal, do not use special sensor promptly can be low-cost really and easily being held in the loss state that stove all forms the refractory brick of liner, industrial effect is high.Form of implementation 4
The removable fixed iron-smelting furnace of the lower channel of form of implementation 4 has furnace body, support base, lowering or hoisting gear, position regulator, fixed mechanism, and upper slot supporting arrangement, this furnace body is separable into upper slot and lower channel at least, this support base is arranged at the below of above-mentioned furnace body with being connected and supports furnace body in the operation that connects upper slot and lower channel all with above-mentioned lower channel, thereby this lowering or hoisting gear makes above-mentioned support base lifting that upper slot is separated and fluid-tight engagement with lower channel, this position regulator be used to adjust and the support base that keeps having raise by above-mentioned lowering or hoisting gear in the position of vertical direction, this fixed mechanism is used for fixing the support base of having been adjusted the vertical direction position by above-mentioned position regulator, and this upper slot supporting arrangement is skyborne assigned position supporting upper slot when by above-mentioned lowering or hoisting gear furnace body being separated into two parts.
In addition, in the lower channel replacing method of the fixed iron-smelting furnace of form of implementation 4, it is characterized in that: the fixed iron-smelting furnace has furnace body and support base, this furnace body is separable into upper slot and lower channel at least, this support base is arranged at the below of furnace body with being connected with lower channel, in the operation that connects upper slot and lower channel, all by above-mentioned support base supporting furnace body; Under state, remove being connected of upper slot and lower channel by above-mentioned support base supporting furnace body, then, support base is descended, in its decline process, upper slot is supported on aerial assigned position by the upper slot supporting arrangement, separate upper slot and lower channel, from move the lower channel of having separated near the position of upper slot below, afterwards, in the new lower channel that is connected with support base near the position configuration below the upper slot, support base is risen, upper slot with new lower channel fluid-tight engagement be connected.
In this form of implementation 4, furnace body is separable into upper slot and the such two parts of lower channel at least, when connecting the ironmaking of upper slot and lower channel, by the support base supporting upper slot of being located at the lower channel below and the weight of the furnace body that lower channel constitutes and the weight of raw material in the furnace body and reaction product, play the effect of fixed iron-smelting furnace, so, compare with the Dumpage type iron-smelting furnace, favourable on the mechanical strength, but the also increase of suppression equipment expense in Large Furnace.
In the occasion of changing lower channel, after removing being connected of upper slot and lower channel, the replacing of lower channel is not being formed the assigned position in space of obstacle by upper slot supporting arrangement supporting upper slot, afterwards, thereby lower channel is descended separates with upper slot, so, can easily change lower channel and not hinder upper slot.The load that acts on the upper slot supporting arrangement only is the weight of upper slot, thus compare the mechanical strength that can further reduce the upper slot supporting arrangement with the supporting arrangement of Dumpage type iron-smelting furnace, but the increase of suppression equipment expense.
This form of implementation 4 is described below with reference to the accompanying drawings.Figure 17 is the plane skeleton diagram that the form of implementation of the fixed iron-smelting furnace of the present invention is shown, Figure 18 and Figure 19 are the vertical section skeleton diagram of the X-X face among Figure 17, Figure 18 is the figure that the state that connects upper slot and lower channel is shown, Figure 19 is the figure that the state that has taken off lower channel is shown, Figure 20 is the vertical section skeleton diagram of the Y-Y face of Figure 17, and Figure 21 is the vertical section skeleton diagram of the Z-Z face of Figure 17.
In the drawings, furnace body 302 is made of upper slot 303 and lower channel 304, the inwall of this upper slot 303 and lower channel 304 is constructed by refractory material, and upper slot 303 is connected with the flange 317 of being located at lower channel 304 upper ends by the flange 316 of being located at upper slot 303 lower ends separably with lower channel 304.Support base 305 is set below furnace body 302, and lower channel 304 is connected by bolt (not shown) etc. by the supporting station 306 of being located at support base 305 separably with support base 305.
In amounting to 8 positions portable pin 308 is set below support base 305, this movable type pin 308 can be inserted in the gap on support base 305 and basis 326 by the hydraulic cylinder 309 that is fixed in basis 326.In this form of implementation, keep the position regulator of support base 305 as adjusting in the position of vertical direction, adopt this movable type pin 308.The section of portable pin 308 is a wedge shape, by adjusting the degree of depth that portable pin 308 is inserted into support base 305 and the gap on basis 326, the vertical position that can adjust support base 305 promptly in the middle of the position (detailed description of middle pallet 312 and supporting arm 313 will be explained below) of 313 of pallet 312 and supporting arms.
Support base 305 is fixed to basis 326 by the foundation bolt 310 and the nut 311 that are embedded in the basis 326.In this form of implementation, as the fixing fixed mechanism of adjusting the support base 305 of vertical direction position by movable type pin 308, use this foundation bolt 310, the foundation bolt 310 that is arranged at 6 positions altogether is arranged at foundation bolt and is provided with in the hole 319, can be by means of pin 325 at the central portion warpage of foundation bolt 310, and the barrier when not becoming support base 305 and moving.
With support base 305 below 4 jiaos of corresponding bases 326 be provided with and be used for jack and be provided with hole 320, be provided with cheating in 320 at jack jack 307 be set.The lifting support base 305 under the state of supporting upper slot 303 and lower channel 304 or lower channel 304 of stretching by jack 307.In this form of implementation, adopt this jack 307 to make support base 305 liftings, thereby upper slot 303 is separated and fluid-tight engagement with lower channel 304.Jack 307 is collapsible to jack and is provided with in the hole 320, the barrier when not becoming support base 305 and moving.
Hole 318 is set below furnace body 302, and chassis 314 can move on track 315 in hole 318.The support base 305 that chassis 314 can load the state that is in supporting lower channel 304 moves.In this form of implementation, the transfer device as transfer lower channel 304 from the position below upper slot 303 adopts this chassis 314.
In the two sides of upper slot 303 supporting arm 313 is set, in addition, the middle pallet 312 that is fixed in basis 326 is being set near the position below the vertical direction of supporting arm 313.In the occasion that furnace body 302 is descended, by middle pallet 312 supporting supporting arms 313, later upper slot 303 does not descend, so the lower channel 304 that is loaded into chassis 314 can not hinder upper slot 303 ground to move in the decline way of jack 307.In this form of implementation, adopt this centre pallet 312 as the upper slot supporting arrangement that upper slot 303 is supported on aerial assigned position.
The top blow oxygen lance 321 and the pipeline 324 that becomes waste gas stream and raw material supply mouth of the top board that connects upper slot 303 are set at upper slot 303, and molten metal outlet 322 and bottom blowing nozzle 323 are set, constitute iron-smelting furnace 301 in lower channel 304.This iron-smelting furnace 301 is used for melting, reducing and smelting, at the waste gas of upper slot 303 liftings time sealing by pipeline 324, the pipeline (not shown) of retractable is set on the top of pipeline 324.
The following describes the replacing method of lower channel 304 of the iron-smelting furnace 301 of such formation.At first, be equipped with chassis 314 near the position below the support base 305 of fixing by foundation bolt 310.Then, remove being connected of flange 316 and flange 317, and after taking off nut 311 and foundation bolt 310, make jack 307 risings, be contacted with support base 305 below.After jack 307 contacts below support base 305, jack 307 is further risen, support upper slots 303, lower channel 304, reach support base 305 by jack 307, between support base 305 and portable pin 308, form the gap.Under this state, pull out portable pin 308 from 326 gap of support base 305 and basis.After pulling out portable pin 308, by jack 307 make upper slot 303, lower channel 304, and support base 305 slowly descend.In this descended on the way, supporting arm 313 was by middle pallet 312 supportings, and upper slot 303 stops to descend, but jack 307 further continues decline, loads the support base 305 of the state that is in supporting lower channel 304 on chassis 314.The chassis 314 that loads lower channel 304 and support base 305 moves to lower channel and changes the position (not shown) from the position near upper slot 303 belows, change the position in lower channel and by crane (not shown) etc. the support base 305 of putting the lower channel 304 that finishes in order will be installed and be reloaded into chassis 314.In addition, also can pull down and use the lower channel 304 that is over, change with the lower channel 304 that arrangement finishes from support base 305.
Then, mobile trolley used 314, the lower channel 304 that arrangement is finished is installed to the position near upper slot 303 belows.Make by jack 307 to be in supporting and to have put the support base 305 of the state of the lower channel 304 that finishes in order and rise, with flange 316 fluid-tight engagement of flange 317 with the upper slot 303 of lower channel 304.Behind flange connector 316 and flange 317, make jack 307 next step risings, make upper slot 303 rise to the position that pushes away by on the lower channel 304, afterwards, stop jack 307.After under this state moving pin 308 being inserted into the gap on support base 305 and basis 326, jack 307 is descended, with support base 305 mountings to movable type pin 308.The position adjustment of carrying out on the vertical direction by means of 308 pairs of support base of movable type pin 305, owing to do not apply the load of furnace body 302 at middle pallet 312, so, as long as adjust the position in the gap about middle pallet 312 and supporting arm 313 formation 10mm roughly.
Then, by foundation bolt 310 and nut 311 fixed bearing substrates 305, the replacing that finishes lower channel 304 gets final product.After installing lower channel 304, middle pallet 312 might contact with supporting arm 313, but when in iron-smelting furnace 301, beginning to smelt iron, upper slot 303 and lower channel 304 thermal expansion together, middle pallet 312 separates with supporting arm 313, all weight of support base 305 supportings.
Like this, even iron-smelting furnace of the present invention 301 is fixed, also replaceable lower channel 304 even particularly need change as fusion reducing furnace in the iron-smelting furnace of lower channel 304, also can be used as cheap iron-smelting furnace and does not cause the increase of cost of equipment.
In the above description, iron-smelting furnace 301 to the form that furnace body 302 is divided into two parts is illustrated, even but upper slot 303 further is divided into the above type of two parts, or do not construct refractory material at the inwall of upper slot 303, can not produce any obstacle to use of the present invention yet.In addition, make that upper slot 303 separates with lower channel 304, the upper slot supporting arrangement of the fixed mechanism of the lowering or hoisting gear of fluid-tight engagement, the position regulator of adjusting the vertical direction position that keeps support base 305, fixed bearing substrate 305, supporting upper slot 303 and the transfer device that moves the support base 305 of the state that is in supporting lower channel 304 be not limited to said circumstances, much less, the habitual device with each function also can be implemented the present invention.
Iron-smelting furnace of the present invention is fixed, and the lower channel of furnace bottom is replaceable, so, compare with the Dumpage type iron-smelting furnace of replaceable lower channel, can reduce cost of equipment significantly.In addition, existing fixed formula iron-smelting furnace can not be changed lower channel, and in the life-span of the damage decision refining furnace of lower channel, the iron-smelting furnace of need at every turn rebuilding is all, but according to the present invention, can only change lower channel iron-smelting furnace is rebuild, and its effect is very big.Form of implementation 5
Be used for this form of implementation 5 metallurgical furnace the flange seal device by pair of flanges, sealing surface member, and at least two containment members form, the sealing surface member is installed on either party sealing surface at least of above-mentioned pair of flanges, these at least two containment members in order between above-mentioned sealing surface member and flange seal face in opposite directions or sealing surface member, to remain airtight conditions between the two along flange arranged radially setting.
Above-mentioned containment member is preferably seal of tube spare, and seal of tube spare has the gas passage that is used to import sealed expansion usefulness gas.The sealing device imports to purge gas the gas passage in the space that is formed between pushing member and pair of flanges, and this pushing member is fixed in containment member the assigned position of sealing surface.
Figure 22 illustrates a form of implementation of the sealing device of this form of implementation 5, for example, furnace pressure 2[kgf/cm is shown 2] body of heater with the sealing example of heavy caliber flange.402 of this device sealing lower flange 401 (for example outside dimension Φ 12000mm) and top flanges, (for example cross dimensions 300 * 30mm) for the sealing surface of the sealing surface of flange 402 installation in the above member 405.Sealing surface member 405 is installed on top flange replaceably by bolt 411,411, in addition, the back side of sealing surface member and above packing is installed between the flange, keep the air-tightness of sealing surface member and top flange.The sealing surface of flange is that intumescent seal 403,403 (cross dimensions 40 * 40mm) and the gap is set for example is installed respectively outside the inboard and stove in stove between the sealing surface of sealing surface member 405 and lower flange 401 in the above.Intumescent seal 403,403 is the tubulose that can lead the venting body toward inside, respectively be formed at lower flange 401 in sealed expansion be connected with gas passage 407,407.These gas passages and not shown gas (being generally air) supply source continue, and intumescent seal is supplied with to expand use air, regulate its supply pressure, keep the air-tightness of two sealing surfaces.(for example cross dimensions 40 * 40mm), the lateral deflection of constraint intumescent seal to fixedly install pushing member 404,404 in the both sides of these intumescent seals respectively at lower flange.Flange forms purge gas introduction channel 408 below, its cardinal extremity and not shown inert gas (being generally nitrogen) supply source continue, its front end by the pushing member between intumescent seal towards the space opening between above-mentioned intumescent seal 403,403 and upper-lower seal face.Import cleaning nitrogen in this space.The stove inboard of flange surrounds above-mentioned seal construction ground shield 410 is installed below, protects seal construction not influenced by the heat in the stove thus.In addition, form the flange cooling at last lower flange 401,402 and use cooling water water route 412.Symbol 406 is used the hole for connecting bolt (for example M80 * 72 piece).
In this device, top and the sealing surface member 405 of pushing member 404 is alignd, connect lower flange 401 and top flange 402 by connecting bolt, afterwards, make intumescent seal 403 supply pressure 3[kgf/cm with gas passage 407 towards two NBR through 2 sealed expansions 2] the expansion air, intumescent seal is expanded, be pushed on sealing surface member 405, thereby seal.In addition, import the pars intermedia importing 2.5[kgf/cm of path 408 through two purge gas towards two intumescent seals 403 2] nitrogen, even in the irretentive occasion of sealing of the intumescent seal 403 of stove inboard, the toxic gases such as CO in the stove are not discharged to the outside yet, purge gas (nitrogen) only enters in the stove, can keep the outer security of stove.In addition, even be the occasion of high-temperature atmosphere in stove, also can cut off the heat that directly is radiated intumescent seal 403 by shield 410, by intumescent seal 403 metal temperature is on every side descended, the temperature of intumescent seal 3 can be remained on below the heat resisting temperature (for example 80 ℃).
In this structure, as shown in figure 23, as the gap of following flange 1 and top flange 402 below about 10mm, can seal by the expansive force of intumescent seal 403, but in the process of the connection of carrying out flange repeatedly, opening, the flange distortion, the crack surpasses the such occasion of 10mm betwixt, insert seal 409 as 405 of flange 402 and sealing surface members in the above, or with other corresponding with the flange distortion like that as described in Figure 24 sealing surface member 405 replacings, then can keep sealing.In addition, produce the occasion of scar at sealing contact surface in the open operation of the connection by flange etc., can as long as change 405 of sealing surface members.
As described above according to the present invention because the sealing surface of replaceable flange, so can easily keep in repair flange, in addition, but the distortion of opposing flanges correct, can easily keep sealing.In addition, because the containment member of flange uses a plurality of intumescent seals, can improve sealing, by between containment member, importing purge gas,, can prevent that also gas from leaking the danger that produces even air-tightness descends, improve security, given play to obvious effects in these areas.Form of implementation 6
The metallurgical furnace of this form of implementation 6 comprises body of heater, is arranged at the tapping hole of above-mentioned body of heater bottom, accept from casting ladle the molten iron made in advance tundish, and for the molten iron of toward metallurgical furnace in, packing into as prepackage molten iron (kind soup) and from above-mentioned tundish toward tapping hole the molten iron introduction channel of importing molten iron.
Above-mentioned metallurgical furnace peels off in order to prevent to import molten iron, and the inboard that is preferably in above-mentioned tapping hole has the thermal insulation sleeve.Select a kind of the pipe that pipe that this thermal insulation sleeve can be made from grog refractory brick and grog castable refractory material are made.
Above-mentioned metallurgical furnace preferably also has be disposed at the tapping hole inboard anti-and peels off with thermal insulation fiber or sheet material and be disposed at this fiber or the refractory material tubulation member of sheet material inboard.Above-mentioned thermal insulation fiber or sheet material can be from asbestos, glass system, and the material of porous matter system select a kind of.Above-mentioned refractory material tubulation can be from Al 2O 3, MgO-C, Al 2O 3It is a kind of that the burning till in refractory material and the precast shaping refractory material of-SiC-C selected.
Below, the present invention pre-installs a form of implementation of molten iron charging apparatus with reference to description of drawings.This device have from casting ladle 510 accept the molten iron 520 made in advance tundish 530, have the fusion reducing furnace 550 of tapping hole 540 and molten iron imported to the molten iron introduction channel 560 of the tapping hole 540 of fusion reducing furnace from above-mentioned tundish 530, can the molten iron in the tundish be packed into as pre-installing molten iron from the tapping hole of fusion reducing furnace., there has been blast furnace here, then the molten iron of producing in the ironmaking processes can be used as the prepackage molten iron as iron-smelter.In addition, have the occasion of electric furnace in steelmaking process, the molten iron that can in steelmaking process the iron fusing be formed is as the prepackage molten iron.Perhaps, the fusing waste material can be added the molten iron of carbon production as the prepackage molten iron.
The molten iron introduction channel 560 that molten iron in the tundish is guided to tapping hole disposes like that as shown in figure 26 and allows molten iron lead to fire resisting material tube 562 in the casing 561, and heap sand 563 between casing and fire resisting material tube.Because fire resisting material tube is as long as only have durability, so can use inexpensive material as the SK34 material when importing the prepackage molten iron.
In the present invention, building of tapping hole refractory material is configured to such as shown in figure 27 sclerosis refractory brick 544, and its profile is a rectangle, and inboard footpath is a circular cross section.
, the structure of building of the tapping hole refractory material of fusion reducing furnace is essentially and the blast furnace identical construction.In the stove of fusion reducing furnace because molten iron and slag flow, so can be as not seeing at blast furnace the mud material thickness that surpasses the tapping hole refractory material be deposited in the tapping hole front portion.Therefore, can not as the operation of blast furnace, recover the such operation of the tapping hole degree of depth.The life-span of tapping hole is the determinant of melting and reducing converter life, so, need to consider to make when loading on call molten iron not damage the tapping hole refractory material because of peeling off.
In this occasion, the tapping hole refractory material peels off in order to prevent to accept molten iron, has method by preheating tapping hole refractory materials such as gas-fired nozzles, but operation is prepared to need the time and is considered that the prepackage molten iron temperature that temperature therebetween descends when packing into needs more than 1400 ℃ behind the molten iron of packing into, so, only depend on preheating to be difficult to prevent peeling off of refractory material.For this reason, form of implementation as shown in figure 28 is such, and in order to prevent this damage when packing molten iron into, the inboard that is preferably in sclerosis refractory brick is provided with anti-peeling off with thermal insulation sleeve 541 in above-mentioned sleeve.Sleeve 541 is that the pipe of refractory brick or grog are that pipe of making of castable refractory material etc. constitutes by grog for example.
In addition, in form of implementation of the present invention shown in Figure 29, damage when preventing that tapping hole from inserting molten iron is peeled off with thermal insulation fiber or sheet material 542 in that the configuration of the inboard of this sclerosis refractory brick 544 is anti-, disposes refractory material tubulation member 543 in the inboard of this fiber or sheet material.The fiber of thermal insulation or sheet material 542 for example by asbestos systems, glass system, and the material of porous matter system constitute.Refractory material pipe component 543 is for example by Al 2O 3, MgO-C, Al 2O 3Burn till refractory material and the precast shaping refractory material of-SiC-C constitute.By disposing them, the internal diameter that makes tapping hole is about 50～100mm.
As described above, in this form of implementation 6, because the tapping hole of fusion reducing furnace is used as the oral area of packing into that the prepackage molten iron is used, so do not need mechanical sealing.That is, fusion reducing furnace is for carrying out apparatus operating under the above high pressure of 0.2Mpa, so, in the occasion of the oral area of packing into that the prepackage molten iron is set separately, need keep the sealing of this part.As the present invention, when with tapping hole as the prepackage molten iron use the molten iron loading port time, after packing into,, then can begin operation as sealed by Mutegun the samely with common operation, do not need mechanical sealing device.In addition, can improve the thermal insulation of tapping hole, while protect the tapping hole refractory material to accept to pre-install molten iron.
Embodiment
In illustrated prepackage molten iron charging apparatus,
[tundish]
Highly: 2000mm, iron water amount: 40ton * 4 bags
[molten iron introduction channel (refractory material pipe component)] highly:
The height of tundish side: 1150mm, the length of refractory material pipe component: 13m, the material of fire resisting material tube: SK34
[tapping hole]
Highly: 800mm
[anti-peeling off used the thermal insulation sleeve]
Grog is the pipe that refractory brick is made
[anti-peeling off used the thermal insulation fiber]
Asbestos are material
[refractory material tubulation]
Al 2O 3Burned material
Though be that the prepackage molten iron imports from tapping hole in the above conditions with the molten iron, when packing molten iron into, do not observe the damage of tapping hole.In addition, behind the molten iron of packing into,, according to the present invention tapping hole is used as the insertion mouth of pre-installing molten iron as described above in the short time by the Mutegun sealing, so, can behind the sealing tapping hole, begin operation rapidly.In addition, owing to adopted the structure that prevents the tapping hole shelling of refractory, so, can give play to the remarkable result of the oven refractory that does not damage tapping hole.Form of implementation 7
The method of operating of metallurgical furnace is made of following operation: be blown into stirring gas from the bottom blowing nozzle more than at least 1 of being located at furnace bottom toward molten iron; Discharge molten iron from the tapping hole of being located at furnace sidewall; To stir from least 1 of above-mentioned bottom blowing nozzle and switch to oxygen-containing gas with gas and be blown into, the refractory material around the fusing bottom blowing nozzle enlarges the aperture, discharges the residual molten iron in the stove from the hole that has enlarged.
The method of operating of above-mentioned metallurgical furnace preferably has the operation that is detected the remaining length of above-mentioned bottom blowing nozzle by detecting sensor.The gas that is blown into from the bottom blowing nozzle switches to oxygen-containing gas from stirring with gas when the remaining length of the detected bottom blowing nozzle of above-mentioned detecting sensor is full-length.
In form of implementation 7,, use fixed body of heater as the body of heater of the operation of having carried out residual molten iron.By using fixed body of heater, compare with the Dumpage type body of heater that converter is such, cost of equipment can be suppressed and lowers, reduce the constant expense of manufacturing cost.In addition, by using fixed body of heater, can metal system cooled plate be set in the position, furnace wall that contacts with slag and replace refractory material, thereby can reduce the cost of fire resisting material of furnace body.
By tapping hole being set in this fixed side wall of furnace, discharge molten iron and the slag that in stove, generates continuously or off and on from this tapping hole, but the time be everlasting tapping hole below guarantee the molten iron of ormal weight.In addition, be blown into stirring gas, stir molten iron, can promote the reaction in the stove, for example reduction reaction from the bottom blowing nozzle of being located at furnace bottom.
When the feasible stoves that reach such as loss of the loss of the refractory brick that forms this fixed furnace lining or bottom blowing nozzle during the life-span, the gas that is blown into of at least 1 bottom blowing nozzle is switched to oxygen-containing gas from stirring with gas, oxygen-containing gas is blown in the stove.Like this, make oxygen and molten iron reaction in the oxygen-containing gas, generate FeO, simultaneously heating.Making the refractory material fusing on every side of bottom blowing nozzle and bottom blowing nozzle by this heating and FeO, is central shaft with the position that the bottom blowing nozzle is set, and forms the hole of expansion towards ground, the stove outside from the stove inboard.Finally, at the bottom of the hole straight-flow furnace of expansion, the residual molten iron in the stove is discharged to outside the stove by the hole that enlarges.
In addition, as detecting in operation the remaining length of bottom blowing nozzle, then when the remaining length of bottom blowing nozzle is the datum length that is determined by the life-span, can discharge residual molten iron by detecting sensor, can use fire resisting material of furnace body in greatest limit ground, further reduce the cost of fire resisting material of furnace body.
Molten iron of the present invention is the solution for molten iron, molten steel, molten iron alloy, and in addition, stirring with gas is inert gas such as nitrogen or Ar or the waste gas that produces from this fixed body of heater, and oxygen-containing gas is air, oxygen, reach the mist of air and oxygen.
The present invention is described below with reference to the accompanying drawings.Figure 30 illustrates the smelting and rducing iron ores of 1 example of the invention process form with the skeleton diagram of the side section of fixed body of heater, and Figure 31 is the enlarged drawing of the bottom blowing spray nozzle part of Figure 30.
In these figure, with body of heater iron sheet 602 is gabarit, and the bottom in this body of heater iron sheet 602 will be from the inboard constitutes 2 layers of refractory brick by the order of work refractory brick 603 and permanent refractory brick 604 with supporting station 622 and piles up the fusion reducing furnace 601 of structure and be fixed in basis 623.Pile up the position of structure and keep molten iron 606 and slag 607 having these 2 layers of refractory brick.
The pipeline 620 that is connected with dust arrester (not shown) or preparation reduction furnace (not shown) and the raw material input port 621 that is used for base feed in the stove are set on the top of the body of heater iron sheet 602 that becomes fusion reducing furnace 601 sidewalls.In addition, the body of heater iron sheet 602 that top blow oxygen lance 618 connects top cover can be provided with up or down, can be blown into oxygen in stove.
Furnace bottom at fusion reducing furnace 601 is provided with a plurality of bottom blowing nozzles 608,608a, 608b, is used for being blown into the waste gas of inert gas such as nitrogen or Ar or fusion reducing furnace 601 as stirring gas toward molten iron 606.The number that is provided with of bottom blowing nozzle 608 determines that according to the internal volume of fusion reducing furnace 601 1 fusion reducing furnace 1 is about 6～20.Bottom blowing nozzle 608,608a, 608b are that the stainless steel of 10～30mm is made by internal diameter, and sleeve refractory brick 610 surrounds around it, and the bottom blowing nozzle 608,608a, 608b that prevent stainless steel control are by molten iron 606 melting losses.
Be installed to the method for furnace bottom as bottom blowing nozzle 608,608a, 608b, for example, construct bottom blowing nozzle 608,608a, 608b and sleeve 610 integratedly with securing member 611, then, can outside stove, be fitted in the work refractory brick 603, securing member 611 is installed to body of heater iron sheet 602 by welding or bolt etc.Bottom blowing nozzle 608,608a, 608b are connected with gas supply pipe 612, are blown into to stir to use gas.In this form of implementation, illustrate with nitrogen as the example that stirs gas.
In this form of implementation, the gas supply pipe 612 that is connected to the bottom blowing nozzle 608 of being located at the furnace bottom center is separated into stirring gas supply pipe 612a and oxygen-containing gas supply pipe 612b, switches to stirring gas and oxygen-containing gas with the gas that the valve 614 of being located at oxygen-containing gas supply pipe 612b is blown into bottom blowing nozzle 608 by being located at the valve 613 that stirs with gas supply pipe 612a.
In addition, the interior pipe 609 of stainless steel control is set in this bottom blowing nozzle 608, front end of pipe 609 is routed to the stove inner face in this, embeds optical fiber 617 with the mortar (not shown) in interior pipe 609.The front end in the stove outside of optical fiber 617 is routed to checkout gear 616, is made of the detecting sensor 615 of the remaining length that detects bottom blowing nozzle 608 checkout gear 616 and optical fiber 617.The remaining length of these detecting sensor 615 detected bottom blowing nozzles 608 is measured as described below.Checkout gear 616 is for having the device that sending out of pulse shaken and received, reach signal processing computing function.
Reflect at the inboard front end of the stove of optical fiber by optical fiber 617 from the light pulse that checkout gear 616 sends, turn back to checkout gear 616.The time that sends to reception that checkout gear 616 is measured from light pulse, go out to the distance of the inboard front end of stove of optical fiber 617 according to this Time Calculation.Because the loss meeting of bottom blowing nozzle 608 makes also loss of optical fiber 617,, can measure the remaining length of bottom blowing nozzle 608 like this so the distance that arrives optical fiber 617 front ends is consistent with the distance of the inboard front end of the stove that arrives bottom blowing nozzle 608.
2 layers of position that refractory brick is piled up structure in furnace sidewall, the tapping hole 605 that setting is filled by mud material 624, in addition, the refractory brick of the sidewall of fusion reducing furnace 601 pile up structure above, the metal system cooled plate 619 that is made of copper and copper alloy etc. is installed in body of heater iron sheet 602 in week.Metal system cooled plate 619 than refractory material height, can be used to replace refractory material for the durability of slag 607.
Drop into 621 fusion reducing furnace 601 supply iron ores, coal, quick limes, reach light dolomite from raw material to this formation, then, be blown into oxygen, be blown into nitrogen from bottom blowing nozzle 608,608a, 608b from top blow oxygen lance 618, smelting reduction of ion ores is made molten iron 606.Molten iron 606 is guaranteed ormal weight, and opens tapping hole 605 molten iron 606 and liquid slag 607 are discharged to molten iron keep the container (not shown) before the metal system of reaching cooled plate 619 positions.After the discharge, once more mud material 624 is filled into tapping hole 605 and stops to discharge, continue operation.
In operation, when the remaining length of the bottom blowing nozzle of measuring when detecting sensor 615 608 becomes datum length, perhaps, when the remaining thickness of the work refractory brick of measuring when range estimation or thermocouple etc. 603 becomes root thickness, will switch to oxygen-containing gas from the gas that bottom blowing nozzle 608 is blown into.At this moment, do not need to be blown into stirring gas, can stop to be blown into from other bottom blowing nozzle 608a, 608b.Oxygen-containing gas is suitably selected from the mist of air, oxygen and air and oxygen.
The benchmark of remaining thickness of work refractory brick 603 is about 40～80mm, and in addition, the benchmark of the remaining length of bottom blowing nozzle 608 is the length that is embedded in the part of the work refractory brick 603 remaining length when being 40～80mm.The loss rate of work refractory brick 603 and bottom blowing nozzle 608 is different and different with the application target of stove, so the benchmark of remaining length and remaining thickness also is not limited to said circumstances, as long as be decided to be the optimum value that meets this stove application target.
When bottom blowing nozzle 608 is blown into oxygen-containing gas, molten iron 606 oxidations heating, and generate FeO.At initial period melting stainless steel control bottom blowing nozzle 608, then,, form the recess that has enlarged at the front end of bottom blowing nozzle 608 by this heating by the sleeve refractory brick 610 around above-mentioned FeO and the heat of oxidation fusing bottom blowing nozzle 608.By continuing to be blown into oxygen-containing gas, recess advances towards body of heater iron sheet 2 skiddings gradually from the stove inboard, forms the hole of expanding body of heater iron sheet 2 sides to from the stove inboard in sleeve refractory brick 610.In Figure 31, this hole that has enlarged is illustrated by the broken lines in sleeve refractory brick 610, and the internal diameter in the hole that has enlarged is represented by D.When the hole that has enlarged arrives the position of securing member 611, securing member 611 fusings, molten iron 606 and slag 607 in the stove fall, and flow out to pre-configured molten iron in furnace bottom and keep discharging in the container (not shown).The part of optical fiber 617 and gas supply pipe 612 is melting loss simultaneously.
From internal diameter is that the oxygen-containing gas that the bottom blowing nozzle 608 of 10～30mm is blown into is preferably 100～1000Nm 3/ Hr.This be because, when less than 100Nm 3During/Hr, burn-off rate is slow, need cost a lot of money the time to discharging, when surpassing 1000Nm 3During/Hr, be blown into gas and produce cooling effect, the fusing of sleeve refractory brick 10 is slack-off, wants the overspending time to discharging equally.
Under these conditions, the inside diameter D in the hole that has enlarged is 100～200mm, and remaining molten iron 606 is promptly discharged in the stove, for example, only needs a few minutes when being the 500t left and right sides.In addition because the inside diameter D in the hole that has enlarged is 100～200mm, so, can be easily by recovering with the same operation of the replacing operation of common bottom blowing nozzle 608.In the replacing operation of common bottom blowing nozzle 608, securing member 611 is separated with body of heater iron sheet 602, extract bottom blowing nozzle 608 with sleeve 610, will be fitted to work refractory brick 603 with the bottom blowing nozzle 608 that sleeve refractory brick 610 and securing member 611 one are constructed again and change.Therefore, the inside diameter D in hole there is no need more than 200mm, and for example when expanding the diameter of 400mm to, it is too time-consuming to resume operation, and is not good condition.
Like this, discharge molten iron 606 and slag 607 in the stove, need not install especially promptly and can low expense positively discharge residual molten iron by utilizing bottom blowing nozzle 608.
Above-mentioned explanation has illustrated the fusion reducing furnace 601 of iron ore as fixing body of heater, but fixed body of heater is not limited to fusion reducing furnace 601, also applicable to the scrap iron melting furnace that is blown into oxygen continuous melting scrap iron material, be blown into oxygen with coke reduction Ni ore or Cr ore with the Fe-Ni alloy of making molten condition and the iron-smelting furnace of Fe-Cr alloy.In addition, number and its position of being blown into the bottom blowing nozzle of oxygen-containing gas are not limited to said circumstances, also can be blown into oxygen-containing gas from a plurality of bottom blowing nozzles.Detecting sensor 615 also is not limited to said circumstances, also can adopt the structure of imbedding optical fiber 617 in sleeve refractory brick 610, and the line with 2 energising performances of also available coaxial cable or insulation replaces optical fiber 617, electromagnetic pulse is flow through measure.Even bottom blowing nozzle 608 adopts refractory material to replace stainless steel tube to make, can not bring any problem to application of the present invention yet.
Embodiment
Below, the embodiment of fusion reducing furnace 610 shown in Figure 30 is described.At diameter is the inner face of the body of heater iron sheet of 10m, and the work refractory brick of MgO-graphite brick is set to the thickness of 900mm, at the MgO refractory brick of the thick 150mm of its arranged outside as the permanent refractory brick.The bottom blowing nozzle is made by the stainless steel tube of external diameter 29mm, internal diameter 25mm.The optical fiber of diameter 0.2mm is managed in mortar is embedded into the stainless steel control of external diameter 17mm, internal diameter 12mm.The bottom blowing nozzle add up to 10, the bottom blowing nozzle that wherein is used to be blown into oxygen-containing gas is to be in 1 of stove center.
If the total amount of the nitrogen quantity delivered of bottom blowing nozzle is 8000-12000Nm 3/ Hr, the oxygen quantity delivered of top blow oxygen lance is 75000Nm 3/ Hr, the iron ore quantity delivered is 190ton/Hr, and the coal quantity delivered is 100ton/Hr, and the quick lime quantity delivered is 4ton/Hr, and the light dolomite quantity delivered is 4ton/Hr, with this understanding iron ore is carried out melting and reducing.As a result, molten iron is with the speed manufacturing of 125ton/Hr, from tapping hole the molten iron that generates and slag is discharged to molten iron and keeps in the container in per 2 hours.Proceed operation simultaneously.
After beginning operation 75 days be 50mm because the bottom blowing nozzle is fitted to the length of work refractory brick as the detected value of detecting sensor, so stop operation, from the bottom blowing nozzle with 300Nm 3/ Hr is blown into oxygen.After being blown into oxygen, begin to discharge molten iron during through 33 minutes, by direct current discharge very uniformly.Molten iron was all discharged in 3 minutes, discharged molten iron 520t in molten iron keeps container.After discharging molten iron, begin to discharge slag, along with the discharge of slag, the molten iron rate of outflow descends, and is last, the hole that has enlarged by slag and loss the refractory brick fragmentation stop up, stop to discharge.
Figure 32 illustrates by from being blown into the result that time series that oxygen begins is measured, the reduction of the bottom blowing nozzle length that this result comprises the bottom blowing nozzle temperature measured by the thermocouple of the sleeve refractory brick peripheral part that is embedded to work refractory brick and permanent refractory brick boundary vicinity, measured by detecting sensor and be blown into the back pressure of oxygen.Shown in figure 32, the temperature of bottom blowing nozzle is 400～600 ℃, in complete no problem value aspect the temperature.Back pressure slowly descended with the time that is blown into, and when going out molten iron, was reduced to 4kg/cm 2When beginning to be blown into oxygen, the distance from the inboard front end of the stove of bottom blowing nozzle to securing member is about 100cm, and the reduction of the length of the end nozzle of being measured by detecting sensor also is about 100cm, can confirm that detecting sensor measures with good accuracy.
In the stove after the cooling, observe the hole that stove is inside and outside and enlarged for discharge, the result, only residual residue 3-4ton in stove based on the carbon material, the discharge situation is very good.In addition, the enlarged-diameter to 100 of tap～150mm, but be stable in the sleeve refractory brick.In addition, confirmed the not damage fully of furnace bottom peripheral equipment.
The present invention is in fixed body of heater, be blown into oxygen-containing gas from being blown into the bottom blowing nozzle that stirs gas, enlarge the hole that is arranged at the bottom blowing nozzle, discharge residual molten iron, positively discharge residual molten iron so can hang down expense, the result can increase substantially the body of heater operating rate, and can reduce the required expense of discharge operation of discharging residue in the stove significantly, industrial effect is fine.

Claims (25)

1. metallurgical furnace comprises the body of heater iron sheet, is located at the sidewall of base wall that the inner lining refractory block of this body of heater iron sheet inboard constitutes and the metal system cooled plate formation of being located at this body of heater iron sheet inboard.
2. metallurgical furnace as claimed in claim 1 is characterized in that: this metal system cooled plate has the water route of the helical configuration that flows through cooling water.
3. a cooled plate of being located at the metallurgical furnace sidewall comprises metal system cooled plate and water route, and this water route is located in this metal system cooled plate, flows through cooling water therein, and has helical configuration.
4. metallurgical furnace, comprise body of heater iron sheet, furnace wall, metal system separator, reach the unshape refractory layer, this furnace wall is made of the cooled plate of being located at this body of heater iron sheet inboard, this metal system separator is located between cooled plate and the cooled plate and is installed on the body of heater iron sheet, and this unshape refractory layer is located at the part of being surrounded by this cooled plate, separator and body of heater iron sheet.
5. metallurgical furnace as claimed in claim 4 is characterized in that: the wedge shape of this separator for from body of heater iron sheet side section being narrowed down.
6. metallurgical furnace, comprise be used to keep with the body of heater of making iron content motlten metal and slag, form the body of heater gabarit iron sheet, be disposed at motlten metal and body of heater that slag contact in perimembranous interior all refractory brick, and above-mentioned in the detection refractory brick outside all refractory brick, this interior all refractory brick is with MgO, Al 2O 3, graphite, SiC or SiO 2Be main composition, even this detection contains the also no problem and material that is easy to detect of liquate operation in motlten metal and the slag more than the 10wt% as the detection material with refractory brick.
7. metallurgical furnace as claimed in claim 6 is characterized in that: above-mentioned detection material is for being that oxide, Sr are that oxide, Zr are at least a material of selecting the oxide from Cr.
8. metallurgical furnace as claimed in claim 6 is characterized in that: above-mentioned detection preferably has the thickness of 30mm at least with refractory brick.
9. metallurgical furnace as claimed in claim 6 is characterized in that: also have to be disposed at and detect with 1 layer of refractory brick of piling up between refractory brick and iron sheet.
10. metallurgical furnace, comprise furnace body, support base, lowering or hoisting gear, position regulator, fixed mechanism, and upper slot supporting arrangement, this furnace body is made of upper slot and lower channel, and be separable into upper slot and lower channel, this support base and above-mentioned lower channel are arranged at the below of above-mentioned furnace body with being connected, and it is all at the occasion supporting furnace body that connects upper slot and lower channel, this lowering or hoisting gear makes above-mentioned support base lifting, thereby upper slot is separated and fluid-tight engagement with lower channel, this position regulator be used to adjust and the support base that keeps having raise by above-mentioned lowering or hoisting gear in the position of vertical direction, this fixed mechanism is used for fixing the support base of having been adjusted the vertical direction position by above-mentioned position regulator, and this upper slot supporting arrangement is the upper slot of assigned position supporting aloft when by above-mentioned lowering or hoisting gear furnace body being separated into two parts.
11. lower channel replacing method with metallurgical furnace of upper slot and lower channel, comprise following operation: provide furnace body and support base, this furnace body is separable into upper slot and lower channel, and this support base is arranged at the below of furnace body with being connected with lower channel; Under the state by above-mentioned support base supporting furnace body, the releasing upper slot is connected with lower channel; Make and removed the support base decline that connects; In the process that above-mentioned support base descends, by the upper slot supporting arrangement upper slot is supported on aerial assigned position, separate upper slot and lower channel; From move the lower channel of having separated near the position of upper slot below; In the new lower channel that is connected with support base near the position configuration below the upper slot; Support base is risen, upper slot with new lower channel fluid-tight engagement be connected.
12. flange seal device that is used for metallurgical furnace, by pair of flanges, sealing surface member, and at least 2 containment members form, the sealing surface member is installed at least one side's of above-mentioned pair of flanges sealing surface, these at least 2 containment members in order between above-mentioned sealing surface member and flange seal face in opposite directions or sealing surface member, to remain airtight conditions between the two along flange arranged radially setting.
13. sealing device as claimed in claim 12 is characterized in that: above-mentioned containment member is a seal of tube spare.
14. sealing device as claimed in claim 13 is characterized in that: the aforementioned tube seal has the gas passage that is used to import sealed expansion usefulness gas.
15. sealing device as claimed in claim 12, it is characterized in that: also have clamp structure and gas passage, this clamp structure is fixed in the assigned position of sealing surface with containment member, and this gas passage imports to purge gas in the space that is formed between pair of flanges.
16. a metallurgical furnace, comprise body of heater, be arranged at the tapping hole of above-mentioned body of heater bottom, accept from casting ladle the molten iron made in advance tundish, and from above-mentioned tundish molten iron is imported to the molten iron introduction channel of tapping hole as pre-installing molten iron for the molten iron of toward metallurgical furnace in, packing into.
17. metallurgical furnace as claimed in claim 16 is characterized in that: to produce in order preventing to import molten iron and to peel off, do not have the thermal insulation sleeve in above-mentioned tapping hole inboard.
18. metallurgical furnace as claimed in claim 16 is characterized in that: select a kind of the pipe that pipe that this thermal insulation sleeve can be made from grog refractory brick and grog castable refractory material are made.
19. metallurgical furnace as claimed in claim 16 is characterized in that: also have be disposed at the tapping hole inboard anti-and peel off with thermal insulation fiber or sheet material and be disposed at this fiber or the refractory material tubulation member of sheet material inboard.
20. metallurgical furnace as claimed in claim 19 is characterized in that: above-mentioned thermal insulation fiber or sheet material can be from asbestos, glass system, and the material of porous matter system select a kind of.
21. metallurgical furnace as claimed in claim 19 is characterized in that: above-mentioned refractory material tubulation can be from Al 2O 3, MgO-C, Al 2O 3It is a kind of that the burning till in refractory material and the precast shaping refractory material of-SiC-C selected.
22. the method for operating of a metallurgical furnace, this method of operating comprises following operation: be blown into stirring gas from the bottom blowing nozzle more than at least 1 of being located at furnace bottom toward molten iron; Discharge molten iron from the tapping hole of being located at furnace sidewall; To stir from least 1 of above-mentioned bottom blowing nozzle and switch to oxygen-containing gas with gas and be blown into, the refractory material around the fusing bottom blowing nozzle enlarges the aperture, discharges the residual molten iron in the stove from the hole that has enlarged.
23. metallurgical furnace operation method as claimed in claim 22 is characterized in that: also have the operation that detects the remaining length of above-mentioned bottom blowing nozzle by detecting sensor.
24. metallurgical furnace operation method as claimed in claim 22 is characterized in that: when the remaining length by the detected bottom blowing nozzle of above-mentioned detecting sensor became datum length, the gas that the bottom blowing nozzle is blown into switched to oxygen-containing gas from stirring with gas.
25. metallurgical furnace operation method as claimed in claim 22, it is characterized in that: be blown into the operation of above-mentioned stirring in the molten iron with gas, by from the bottom blowing nozzle more than at least 1 and furnace bottom nearby the sidewall nozzle be blown into stirring toward the molten iron and constitute with this process of gas.
CN98810337A 1997-10-20 1998-10-19 Structure of metallurgical furnace and operating method using same metallurgical furnace Pending CN1276862A (en)

Applications Claiming Priority (14)

Application Number Priority Date Filing Date Title
JP287188/1997 1997-10-20
JP9287189A JPH11118361A (en) 1997-10-20 1997-10-20 Mounting structure of water-cooled panel in refining furnace
JP287189/1997 1997-10-20
JP9287188A JPH11118360A (en) 1997-10-20 1997-10-20 Water passage structure of water-cooling panel
JP29194097A JPH11131115A (en) 1997-10-24 1997-10-24 Floor type smelting furnace and method of changing lower vessel in floor type smelting furnace
JP291940/1997 1997-10-24
JP334284/1997 1997-12-04
JP33428497A JPH11172310A (en) 1997-12-04 1997-12-04 Device for charging molten seed into smelting reduction furnace
JP33879897A JPH11173428A (en) 1997-12-09 1997-12-09 Sealing device for flange
JP338798/1997 1997-12-09
JP016506/1998 1998-01-29
JP016507/1998 1998-01-29
JP1650698A JPH11217612A (en) 1998-01-29 1998-01-29 Structure for laying brick in furnace body
JP1650798A JPH11217613A (en) 1998-01-29 1998-01-29 Method for discharging residual molten metal in furnace in stationary furnace body

Publications (1)

Publication Number Publication Date
CN1276862A true CN1276862A (en) 2000-12-13

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CN98810337A Pending CN1276862A (en) 1997-10-20 1998-10-19 Structure of metallurgical furnace and operating method using same metallurgical furnace

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KR (1) KR100339261B1 (en)
CN (1) CN1276862A (en)
AU (1) AU751764B2 (en)
CA (1) CA2307090C (en)
WO (1) WO1999020966A1 (en)

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CN105987599A (en) * 2015-01-29 2016-10-05 边仁杰 Bottom block of regenerative furnace
CN107250700A (en) * 2014-12-12 2017-10-13 日新制钢株式会社 The application method of resistance furnace
CN109073575A (en) * 2016-04-13 2018-12-21 杰富意钢铁株式会社 The analysis method of clinker and the method for refining of molten iron
CN110726662A (en) * 2019-10-22 2020-01-24 方大炭素新材料科技股份有限公司 Experimental device for evaluating molten slag iron and erosion resistance of refractory material
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CN102216477A (en) * 2008-09-05 2011-10-12 斯托品克股份公司 Copper anode furnace and a method for operating the same
CN107250700A (en) * 2014-12-12 2017-10-13 日新制钢株式会社 The application method of resistance furnace
CN105987599A (en) * 2015-01-29 2016-10-05 边仁杰 Bottom block of regenerative furnace
CN105987599B (en) * 2015-01-29 2019-06-14 边仁杰 Regenerative furnace
CN109073575A (en) * 2016-04-13 2018-12-21 杰富意钢铁株式会社 The analysis method of clinker and the method for refining of molten iron
CN109073575B (en) * 2016-04-13 2021-05-28 杰富意钢铁株式会社 Method for analyzing slag and method for refining molten iron
CN110726662A (en) * 2019-10-22 2020-01-24 方大炭素新材料科技股份有限公司 Experimental device for evaluating molten slag iron and erosion resistance of refractory material
CN113701505A (en) * 2021-08-11 2021-11-26 中国恩菲工程技术有限公司 Cooling protection device and metallurgical furnace with same

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Publication number Publication date
KR20010024276A (en) 2001-03-26
AU9462998A (en) 1999-05-10
CA2307090C (en) 2005-02-01
KR100339261B1 (en) 2002-06-03
WO1999020966A1 (en) 1999-04-29
AU751764B2 (en) 2002-08-29
CA2307090A1 (en) 1999-04-29

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