CN104334750B - The lining structure of molten metal container - Google Patents
The lining structure of molten metal container Download PDFInfo
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- CN104334750B CN104334750B CN201380028001.0A CN201380028001A CN104334750B CN 104334750 B CN104334750 B CN 104334750B CN 201380028001 A CN201380028001 A CN 201380028001A CN 104334750 B CN104334750 B CN 104334750B
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- thermal insulation
- insulation barriers
- iron sheet
- refractory material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
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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
- F27D1/00—Casings; Linings; Walls; Roofs
-
- 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
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/12—Travelling or movable supports or containers for the charge
- F27D3/123—Furnace cars
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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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/14—Charging or discharging liquid or molten material
-
- 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
- C21C5/44—Refractory linings
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a kind of lining structure of molten metal container, it accommodates motlten metal, in the lining structure of above-mentioned molten metal container, possesses: iron sheet, this iron sheet forms the outermost layer of above-mentioned molten metal container, has multiple by the through hole of lateral surface and medial surface perforation; Individual layer or double-deck permanent refractory material layer, this permanent refractory material layer is arranged at the inner side of above-mentioned iron sheet; Workpiece refractory masses, this workpiece refractory masses is arranged at the inner side of above-mentioned permanent refractory material layer, forms the scope of operation contacting with above-mentioned motlten metal, and at least a portion of this workpiece refractory masses is made up of unshape refractory; And multiple thermal insulation barriers, the polygon parts that above-mentioned multiple thermal insulation barriers are sheets, be arranged between above-mentioned iron sheet and above-mentioned permanent refractory material layer or double-deck above-mentioned permanent refractory material layer each other, and along the medial surface of above-mentioned iron sheet in abutting connection with configuration, an above-mentioned thermal insulation barriers and and this thermal insulation barriers in abutting connection with configuration other above-mentioned thermal insulation barriers at least one between be formed with gap, above-mentioned gap is positioned on above-mentioned through hole, and has the width more than thickness of above-mentioned thermal insulation barriers.
Description
Technical field
The present invention relates to the lining structure of molten metal container.
Background technology
The molten metal container of the motlten metals such as storage molten iron, molten steel is (below, also referred to as " holdingDevice ". ) lining structure there is the structure as outermost iron sheet supporting refractory material.
There is amorphous refractory and unsetting as the refractory material using in molten metal containerRefractory material. Especially unshape refractory is also referred to as castable, because it is installed easily,Extensively be used as forming the refractory material of the workpiece refractory masses contacting with motlten metal.
Unshape refractory is generally to add in the mixture of the powder of the high-melting-point substances such as aluminium, grainWater flows it and flows into container, and becomes liner shape.
But the fusing point of the metals such as iron is mostly up to hundreds of～1,000 hundreds of DEG C, so motlten metalContainer needs fire resistance and thermal insulation.
In the past, as the method for molten metal container being given to thermal insulation, proposed to workpiece fire-resistantThe rear side of material layer is inserted the method for thermal insulation barriers, for example, in patent documentation 1, discloses with dioxySiClx particulate is that the microporosity formed body of main material is thermal insulation barriers.
Patent documentation 1: TOHKEMY 2008-249317 communique
In the situation that packing into the molten metal container such as molten steel, if forming workpiece refractory massesUnshape refractory in remain moisture, therein water vapor pressure for example on 200 DEG CRise 10 more than air pressure, unshape refractory may explosion and breakage.
Therefore, using when molten metal container, unshape refractory is implemented to heating in advance andMake it dry (below, also referred to as " dry in advance ". ). For prevent unshape refractory because ofWater vapor pressure and breakage is dried in advance for a long time at lower temperature.
Because use burner etc. is dried in advance from the inner side of container, so at unsetting fire proofed woodThe position of the outer surface side of material, low to below 100 DEG C in pre-dry starting stage temperature, fromA part of condensation of the inside of unshape refractory steam out and become liquid water. SoAfter, the position of the outer surface side of unshape refractory also becomes more than 100 DEG C, and moisture becomes steamingGas.
Be formed with through hole at the outermost iron sheet as container, by dry from unsetting in advanceRefractory material steam is out discharged to outside from this through hole.
But, insert thermal insulation barriers in the rear side of workpiece refractory masses, hinder from passing throughThe exhaust of through hole. And the inner surface side of unshape refractory is solidified by dry in advance,Part sintering, so the steam of not discharging from through hole is difficult to discharge and stay from inner surface sideInner.
Therefore,, no matter whether remain moisture in the inside of unshape refractory, all think by mistake pre-First dry being through with, and pack motlten metal into container, and may cause unshape refractoryExplosion breakage.
Summary of the invention
The present invention completes in view of above situation, and object is that the melting gold of thermal insulation barriers is being installedBelong in the lining structure of container, make the aeration in unshape refractory dry in advance good.
The present inventors have carried out wholwe-hearted research to achieve these goals. Found that: pass throughThermal insulation barriers to the polygon parts as sheet specifically configures, thereby can be unsettingIn refractory material dry in advance, make the aeration of steam good, completed thus the present invention.
, the invention provides following (1)～(3).
(1) a kind of lining of molten metal container structure, it accommodates motlten metal, in above-mentioned meltingIn the lining structure of canister, possess: iron sheet, this iron sheet forms above-mentioned molten metal containerSkin, has multiple by the through hole of lateral surface and medial surface perforation; Individual layer or double-deck forever resistance toFire material layer, this permanent refractory material layer is arranged at the inner side of above-mentioned iron sheet; Workpiece refractory masses,This workpiece refractory masses is arranged at the inner side of above-mentioned permanent refractory material layer, forms and above-mentioned melting goldThe scope of operation that belongs to contact, at least a portion of this workpiece refractory masses is by unshape refractory structureBecome; And multiple thermal insulation barriers, the polygon parts that above-mentioned multiple thermal insulation barriers are sheets, are arranged on above-mentionedBetween iron sheet and above-mentioned permanent refractory material layer or double-deck above-mentioned permanent refractory material layer each other itBetween, and along the medial surface of above-mentioned iron sheet in abutting connection with configuration, an above-mentioned thermal insulation barriers and with this thermal insulation barriersBetween at least one in other above-mentioned thermal insulation barriers of adjacency configuration, be formed with gap, location, above-mentioned gapOn above-mentioned through hole, and there is the width more than thickness of above-mentioned thermal insulation barriers.
(2) in the lining structure of the molten metal container of recording in above-mentioned (1), above-mentioned gapWidth is below the thickness of above-mentioned iron sheet.
(3) in the lining structure of the molten metal container of recording in above-mentioned (1) or (2), onState the covering that thermal insulation barriers is accommodated in water proofing property.
According to the present invention, in the lining structure of molten metal container that thermal insulation barriers is installed, canMake the aeration in unshape refractory dry in advance good.
Brief description of the drawings
Fig. 1 cuts a part for steel ladle 1 and the side view that illustrates.
Fig. 2 be observe from the inner side of steel ladle 1 along the medial surface shape configuration of iron sheet 2 multiple everyThe schematic diagram of warmware 5.
Fig. 3 is the width that represents clearance G ratio and the clearance G with respect to the thickness of thermal insulation barriers 5The chart of the relation by the temperature of iron sheet 2 sides.
Fig. 4 (a) represents that making the thickness of iron sheet 2 is 30mm the clearance G that makes thermal insulation barriers 5The infrared thermal imagery of the width steel ladle 1 that is 40～50mm, Fig. 4 (b) is presentation graphs 4 (a)Infrared thermal imagery in line A and the chart of the Temperature Distribution of B.
Fig. 5 be the width that represents clearance G with respect to the ratio of the thickness of iron sheet 2, with iron sheet gapThe chart of the relation of the radiation thermal discharge of the 2a of portion.
Fig. 6 (a) represents that making the thickness of iron sheet 2 is 30mm the clearance G that makes thermal insulation barriers 5The infrared thermal imagery of the width steel ladle 1 that is 20～30mm, Fig. 6 (b) is presentation graphs 6 (a)Infrared thermal imagery in line A and the chart of the Temperature Distribution of B.
Detailed description of the invention
Below, one embodiment of the present invention is described. Below the embodiment of explanation is for accommodatingAs the application examples of the steel ladle 1 of the molten steel 61 of motlten metal.
Fig. 1 cuts a part by steel ladle 1 and the side view that illustrates. Steel ladle shown in Fig. 11 accommodates and keeps by converter by the converted molten steel 61 of molten iron. On the liquid level of molten steel 61Float and have slag (not shown). In steel ladle 1, carry out from molten steel 61, removing impurity or addingAdd the processing of the double refining of element. Molten steel 61 after double refining finishes is defeated by steel ladle 1Send, be supplied to continuous casting working procedure.
The lining structure of steel ladle 1 has iron sheet 2, permanent refractory material substantially successively from outsideLayer 3 and workpiece refractory masses 4. And, grade to be provided with in the side surface part of steel ladle 1 and send outWave the thermal insulation barriers 5 of heat insulating function.
Below, first according to Fig. 1, permanent refractory material layer 3 and workpiece refractory masses are described4。
Permanent refractory material layer 3 is arranged at the inner side of iron sheet 2. Permanent refractory material layer 3 is rearWorkpiece refractory masses 4 (part) damage of stating and while having come off for molten steel 61 is not let outLeakage is guaranteed safety and the brick layer of installation. Permanent refractory material layer 3 can be provided with individual layer, also canBe provided with as shown in Figure 1 bilayer.
As the refractory material that forms permanent refractory material layer 3 (also referred to as " permanent refractory material ". )31 for example use the amorphous refractories such as agalmatolite firebrick (forming brick). As shown in Figure 1, fire-resistantMaterial 31 uses mortar 32 to lay bricks as joint filler.
Even peel off for some reason for workpiece refractory material, molten steel 61 also do not spill immediatelyReason, more than the thickness of permanent refractory material layer 3 is preferably 40mm, for preventing molten steel 61The reason flowing out by seam, the more preferably double-deck installation.
Workpiece refractory masses 4 is arranged at the inner side of permanent refractory material layer 3. Workpiece refractory materialLayer 4 is the layers that form the scope of operation contacting with molten steel 61.
In Fig. 1, illustrate and used unshape refractory as forming the resistance to of workpiece refractory masses 4Fire material is (also referred to as " workpiece refractory material ". ) 41 example. Using unshape refractoryIn 41 situation, make at aluminium oxide (Al2O3), the high-melting-point substances such as magnesia (MgO)In the mixture of powder, grain, add water and make its mobile material, flowing into permanent refractory material layer 3 and typeBetween mould (not shown), and form liner shape.
But, if unshape refractory 41 remains in the time having packed molten steel 61 into steel ladle 1Moisture, for example rises 10 at 200 DEG C in the internal water vapour pressure of unshape refractory 41More than air pressure, unshape refractory 41 may explosions and breakage. Therefore, in order to prevent like thisBreakage, under lower temperature, be dried in advance for a long time.
Generally, use inner side (, the workpiece refractory material from steel ladle 1 such as burnerThe scope of operation side of layer 4) be dried in advance. Therefore, the outer surface of unshape refractory 41The position of side (, workpiece refractory masses 4 by iron sheet 2 sides) is on pre-dry initial rankSection, temperature is low to below 100 DEG C, from the inside of unshape refractory 41 one of steam outPartial condensation and become liquid water. Then, in pre-dry interstage～final stage,The position of the outer surface side of unshape refractory 41 also becomes more than 100 DEG C, and moisture becomes steamingGas, discharges from the through hole H described later that is formed at iron sheet 2.
In order to reduce repair rate and to improve operating rate, workpiece refractory masses 4 is (unsetting fire-resistantMaterial 41) thickness more thick better. But, if use the very ambassador of difference of the thickness in initial and latter stageInternal capacity variation is large, liquid level, can maintenance dose variation and operability is reduced, or holdThe amount of thinking highly of increases makes equipment scale become large. For this reason, workpiece refractory masses 4 (noAmorphous refractory 41) thickness be preferably 100～250mm, with cushion part (bottom surface sections)Near border because being exposed to steel flow, residual slag is thicker, other positions are thinner, thereby more excellentElect as according to position and change thickness.
Next, iron sheet 2 is described. Iron sheet 2 is to prop up as the outermost layer of steel ladle 1Hold the steely structure of refractory material (refractory material 31, refractory material 41).
The lower limit of the thickness (in Fig. 1, the length shown in T2) of iron sheet 2 calculates decision by intensity,Although thereby the thicker more difficult distortion life-span is longer, consideration expense and weight limits, adoptThe example of 30～90mm is more.
Be formed with multiple through hole H of the lateral surface of iron sheet 2 and medial surface perforation at iron sheet 2.Make to be dried from unshape refractory 41 steam out by through hole H in advance by above-mentioned.
The aperture of through hole H is not particularly limited, but from preventing the obstruction of the generations such as refractory material pieceViewpoint consider, more than being preferably 6mm. On the other hand, just can be abundant as long as prevent from stopping upGuarantee aeration, so be mostly below 30mm.
Next, thermal insulation barriers 5 is described. Thermal insulation barriers 5 is at least installed on the side of steel ladle 1Face, but also can be installed on cushion part (bottom surface sections).
In the situation that double-deck permanent refractory material layer 3 is set, the installation site of thermal insulation barriers 5 canBetween this bilayer. But, use from the temperature that can reduce thermal insulation barriers 5, can grow timeBetween the reason of (for example, more than 2 years) performance heat-proof quality consider, as shown in Figure 1, preferably will be everyWarmware 5 is arranged between iron sheet 2 and permanent refractory material layer 3.
Below, taking situation that thermal insulation barriers 5 is installed between iron sheet 2 and permanent refractory material layer 3 asExample describes, but the present invention is not limited to this.
Thermal insulation barriers 5 is parts of sheet, for example, by with silica (SiO2), aluminium oxide (Al2O3)The microporosity formed body that is main material Deng particulate forms.
But, if the particulates such as the silica microporosity material forming that is shaped is connect with liquid moistureTactile can flow and lose thermal insulation. Therefore, use add water install unshape refractory 41Situation under, the thermal insulation of thermal insulation barriers 5 may reduce.
Therefore the covering 51 that, preferably thermal insulation barriers 5 is accommodated in to water proofing property prevents from producing because of moistureRaw is deteriorated. As long as the material of covering 51 has water proofing property to be not particularly limited, for example, canEnumerate resin molding etc., particularly, for example, the resins such as polypropylene, polyethylene are all applicable to. In addition,In order to improve moisture resistance, also use material aluminium foil laminate being formed by above-mentioned resin.
The thickness (in Fig. 1, the length shown in T5) of thermal insulation barriers 5 is not particularly limited, but fromMake also can prevent molten steel 61 in the situation that making for some reason molten steel 61 contact with thermal insulation barriers 5The object consideration of melting loss thermal insulation barriers 5 expansion on a large scale, the thickness of thermal insulation barriers 5 is preferably 15mmBelow, 3～10mm more preferably. In addition, the thickness of thermal insulation barriers 5 is to comprise covering 51 to existInterior thickness.
Fig. 2 observes along multiple thermal insulation barriers of the medial surface configuration of iron sheet 2 from the inner side of steel ladle 15 schematic diagram. Removing iron sheet 2 and thermal insulation barriers 5 structure in addition in Fig. 2, are omitted.
In Fig. 2, the thermal insulation barriers 5 that shows sheet is oblong-shaped. But, the shape of thermal insulation barriers 5Shape is not particularly limited as long as polygonal shape, except rectangle, for example, can enumerate ladderThe shape such as shape, triangle. Particularly, for example, in the situation that iron sheet 2 is circular cone shape,The shape of thermal insulation barriers 5 can be trapezoidal.
As shown in Figure 2, multiple thermal insulation barriers 5, along the medial surface of iron sheet 2, adjoin each other and configure.For example utilize the adhesive tape that material is identical with covering 51 (with reference to Fig. 1), by solid thermal insulation barriers 5Due to the medial surface of iron sheet 2.
Now, at least one in a thermal insulation barriers 5 and other thermal insulation barriers 5 of being adjacentBetween thermal insulation barriers 5, be formed with clearance G.
For example, in Fig. 2, around thermal insulation barriers 5a, adjacency disposes other thermal insulation barriers 5b～5e.Wherein, between thermal insulation barriers 5a and thermal insulation barriers 5b and thermal insulation barriers 5a and thermal insulation barriers 5d itBetween position, be formed with respectively clearance G. Therefore, omitted permanent refractory material layer 3 andIn Fig. 2 of workpiece refractory masses 4, iron sheet 2 exposes from clearance G.
Now, thermal insulation barriers 5 configures in the mode that the clearance G of formation is positioned on through hole H.In addition, " clearance G is positioned on through hole H " is to comprise the thermal insulation barriers 5 that forms clearance G to hideThe situation of a part of gear through hole H and the thermal insulation barriers 5 of formation clearance G do not block perforationHole H and make the concept of its situation about exposing.
In addition in Fig. 2, illustrated along the perforation of the linearly arrangement of clearance G that is formed as linearity,Hole H, but the arrangement of through hole H is not limited to this.
And, in the present invention, make the width of the clearance G of thermal insulation barriers 5 (in Fig. 2, shown in WLength) more than the thickness (in Fig. 1, the length shown in T5) of above-mentioned thermal insulation barriers 5. ThisThe lower limit of the width of the clearance G of sample is to set for the viewpoint of guaranteeing aeration.
The present inventors configure thickness as 6mm taking the width of clearance G as the mode of 1～3mm at firstThermal insulation barriers 5, afterwards, pre-dry required time significantly extends. After use, disassemble tuneThe result of looking into shows, this is because the mortar 32 using in the time that permanent refractory material layer 3 is installed is invadedEnter the clearance G of thermal insulation barriers 5 and destroyed the aeration of clearance G.
Therefore, the present inventors are so that the mode that the width of clearance G is various sizes configures thermal insulation barriers5, the steam producing from through hole H during observation is dried in advance and the temperature rise of iron sheet 2. ItsResult is, if the thickness of thermal insulation barriers 5 is 6mm, the short of width 6mm's of clearance GIn situation, pre-dry required time extends, if the thickness of thermal insulation barriers 5 is 3mm,In the situation of the short of width 3mm of gap G, pre-dry required time extends.
In order to verify this phenomenon, infer the ash of the clearance G of having invaded thermal insulation barriers 5 by Calculation of Heat TransferTemperature in slurry 32 dry in advance.
Fig. 3 is the width that represents clearance G ratio and the clearance G with respect to the thickness of thermal insulation barriers 5The chart of the relation by the temperature of iron sheet 2 sides. In the chart of Fig. 3, transverse axis represents clearance GWidth with respect to the ratio (unit: %) of the thickness of thermal insulation barriers 5. On the other hand, the longitudinal axis isOuter surface side temperature at the unshape refractory 41 that forms workpiece refractory masses 4 is 120DEG C, vapour pressure is the pre-dry interstage of 2 air pressure, calculates that mortar 32 invadedThe value by the temperature of iron sheet 2 sides of clearance G (unit: DEG C).
According to the chart of Fig. 3, confirm in the case of the value less than 100% of transverse axis (,The width of gap G is than in the little situation of the thickness of thermal insulation barriers 5), value (, the mortar 32 of the longitudinal axisThe temperature by iron sheet 2 sides of the clearance G of having invaded) lower than 100 DEG C, invade the ash of clearance GThe evaporation of the adhesive water of slurry 32 is slow, and the steam producing from unshape refractory 41 is logicalOut-of-date condensation, obviously destroys aeration.
As mentioned above, in the present invention, the width of clearance G that makes thermal insulation barriers 5 is at thermal insulation barriers 5More than thickness. Thus, in the steel ladle 1 that thermal insulation barriers 5 is installed, also can make unsetting resistance toAeration in fire material 41 dry is in advance good.
In addition, from the reduction that causes effect of heat insulation because forming clearance G is suppressed for minimal sightPoint considers, preferably make thermal insulation barriers 5 clearance G width the thickness of iron sheet 2 (in Fig. 1,Length shown in T2) below. Next, the higher limit of the width of such clearance G is described.
Fig. 4 (a) represents that the thickness of iron sheet 2 is the width of the clearance G of 30mm, thermal insulation barriers 5Be steel ladle 1 (diameter: the 4.0m, highly: infrared thermal imagery 4.5m), figure of 40～50mm4 (b) are the charts of the Temperature Distribution of line A in the infrared thermal imagery of presentation graphs 4 (a) and B.
In more detail, the infrared thermal imagery of Fig. 4 (a) is that slightly downside is from the side observed by craneThe figure of the steel ladle 1 of the state that is accommodated with molten steel 61 of slinging, the position of brighter (of light color)Represent that temperature is higher.
In addition, the chart of Fig. 4 (b) be in the infrared thermal imagery of Fig. 4 (a) × beginning alsoThe Temperature Distribution of the scope (line A and B) finishing at the other end. The length of line A and BBe respectively 1.05m and 1.08m. In the chart of Fig. 4 (b), transverse axis represent taking × as leftThe line A of end and the pixel count of B, the longitudinal axis represents temperature (unit: DEG C).
Here be for example conceived to line A. Line A × temperature be about 240 DEG C. Online A,In iron sheet 2, be positioned at the position of clearance G (below, also referred to as " iron sheet clearance portion 2a ". ) at Fig. 4(a) bright a little in, in the chart of Fig. 4 (b), be chevron, except × also have 2Individual position. Iron sheet clearance portion 2a is than high 20～30 DEG C of left and right, other position, thinks temperature rise.
According to Stefan-Boltzmann's law, to outside radiation heat release and the outer surface temperature of iron sheet 2The biquadratic of degree is proportional, in iron sheet clearance portion 2a, has increased by 20 to outside radiation heat release%. The viewpoint consideration reducing from suppressing effect of heat insulation, preferably the width of the clearance G of thermal insulation barriers 5 to the greatest extentMeasure little.
But, the lower limit of the width of above-mentioned clearance G, the thickness of thermal insulation barriers 5 is generally1～20mm left and right, so be difficult to correctly arrange in conjunction with lower limit the width of clearance G.
Therefore, if increase the hull-skin temperature rising of iron sheet 2 of width of clearance G, according to this base of a fruitSweet smell-boltzmann law, to the biquadratic of the hull-skin temperature of outside radiation heat release and iron sheet 2Proportional, be conceived to this and infer that by Calculation of Heat Transfer the radiation heat release not making to outside significantly increasesThe condition adding.
Fig. 5 be the width that represents clearance G with respect to the ratio of the thickness of iron sheet 2, with iron sheet gapThe chart of the relation of the radiation thermal discharge of the 2a of portion.
In the chart of Fig. 5, transverse axis represents that the width of clearance G is with respect to the ratio of the thickness of iron sheet 2Rate (unit: %). On the other hand, the longitudinal axis is at the state that molten steel 61 is accommodated in to steel ladle 1Lower calculating iron sheet clearance portion 2a is to the value of outside radiation heat release, is that to make transverse axis be 80% calculatingResult is 100 index.
Known according to the chart of Fig. 5, in the case of the width of clearance G is larger than the thickness of iron sheet 2Radiation heat release sharply increases.
Fig. 6 (a) represents that the thickness of iron sheet 2 is the width of the clearance G of 30mm, thermal insulation barriers 5Be the infrared thermal imagery of the steel ladle 1 of 20～30mm, Fig. 6 (b) is the infrared of presentation graphs 6 (a)The chart of the line A in thermal imagery and the Temperature Distribution of B. Fig. 6 (a) and basic sight (b)Point respectively with Fig. 4 (a) and (b) identical, so description thereof is omitted, but the length of line A and BDegree is respectively 0.58m and 1.10m.
From Fig. 6 (a) and (b), the iron sheet of thinking at Fig. 4 (a) and (b)The temperature rise at clearance portion 2a place has been eliminated.
Therefore, the reason consideration significantly reducing from suppressing effect of heat insulation, the clearance G of thermal insulation barriers 5Width preferably below the thickness of iron sheet 2.
Embodiment
Below, enumerate embodiment and specifically describe the present invention. But the present invention is not limited to theseEmbodiment.
<example 1>
At the steel ladle 1 of Fig. 1 (diameter: 4.0m, highly: 4.5m), (thick at iron sheet 2Degree: inner side 30mm), use agalmatolite firebrick as refractory material 31, mortar 32 is doneFor joint filler, and form permanent refractory material layer 3 (thickness: 50mm). And, make oxidationThe unshape refractory 41 of aluminium-magnesia is the mix moisture of quality 6%, flows into forever resistance toBetween fire material layer 3 and pattern (not shown), and formation workpiece refractory masses 4 (thickness:120mm)。
In addition, except cushion part, between iron sheet 2 and permanent refractory material layer 3, also installBe accommodated in polyethylene resin film (material aluminium foil laminate being formed in order to improve moisture resistance) systemThe thermal insulation barriers 5 (thickness: 5mm) of sheet of covering 51. Thermal insulation barriers 5 is by with silicaAnd the particulate of aluminium oxide is main material microporosity formed body forms, it is shaped as rectangle(500～1000mm×350～500mm)。
Now, utilize the adhesive tape that material is identical with covering 51, by solid multiple thermal insulation barriers 5Adjoin each other and configure due to the medial surface of iron sheet 2. Be wire at iron sheet 2 and be formed with perforationHole H (aperture: 12mm), but as shown in Figure 2, in the upper location that is formed with below of thermal insulation barriers 5Clearance G on through hole H.
Carry out the installation of thermal insulation barriers 5 by manual working. Carrying when mounted diameter is 8mm'sPencil, is careful that to make the width of clearance G be the size of 2 times from the diameter of this pencil to diameter. ,The width that makes clearance G is 8～16mm. By such installation, the perforation that clearance G is positioned/ 4th left and right of hole H are blocked by thermal insulation barriers 5.
<example 2>
The width that makes clearance G is 20～40mm, other install thermal insulation barriers 5 identical with example 1.Carry when mounted the pole that diameter is 20mm, be careful the width that makes clearance G for from this poleDiameter to the size of 2 times of diameter. By increasing the allowed band at interval, can use largerThe thermal insulation barriers of type, installation property improves.
<comparative example 1>
The width that makes clearance G is 2～4mm, other install thermal insulation barriers 5 identical with example 1.Carry when mounted the pole that diameter is 2mm, be careful that to make the width of clearance G be from this poleDiameter is to the size of 2 times of diameter.
< evaluate
In each example, form flowing into unshape refractory 41 after workpiece refractory masses 4,Make each conditions such as heating-up temperature in the same manner, use the scope of operation of burner from workpiece refractory masses 4Side is dried in advance, starts to measure required time from pre-dry. In addition, by outside iron sheetThe dehydration temperaturre that surface temperature arrives alumina cement is 150 DEG C, judges that end is dry in advance.
Evaluate the required time of each example taking the required time of example 1 as 100 index. ResultAs described in Table 1. Can be evaluated as: index is less, till be dried in advance the time finishingShorter, the aeration in being dried is in advance better.
In addition, in each example, the steel ladle 1 after dry end is in advance received molten steel 61 and opensBegin to use, according to the infrared thermal imagery after 3 days, evaluate the temperature rise of iron sheet clearance portion 2a.The maximum of the iron sheet clearance portion 2a of iron sheet 2 and the temperature difference at other position (unit: DEG C) as followsState shown in table 1. Can be evaluated as: the temperature difference is less, quilt is got in the temperature rise of iron sheet clearance portion 2aSuppress, thermal insulation is better.
In addition, in each example, the steel ladle 1 after dry end is in advance received molten steel 61 and opensBegin to use, check and observe the refractory material situation after 14 days, evaluate to have or not and peel off loss.Peel off loss different from normal melting loss, peel off for the abnormal of the inside because of refractory materialThickness more than 10mm, can enumerate not dry fully is in advance one of reason.
[table 1]
The 1st table
Known according to the result shown in above-mentioned table 1, example 1,2 is compared with comparative example 1, pre-First dry required time is short, and the aeration in being dried is in advance good. In addition, comparative example 1 is identifiedHave the loss of peeling off in use, drying time, how long dry all possibilities be insufficient in advance.
In addition, known, example 1 compared with example 2, the iron sheet clearance portion 2a of iron sheet 2With having a narrow range of temperature of other positions, the temperature rise of iron sheet clearance portion 2a is suppressed. In addition sending out,In bright example 1, the temperature rise of iron sheet clearance portion 2a below 10 DEG C, being increased in of radiation heat releaseIn insignificant scope.
The explanation of Reference numeral
1 ... steel ladle (molten metal container); 2 ... iron sheet; 2a ... iron sheet clearance portion; 3 ... foreverRefractory masses; 31 ... refractory material (amorphous refractory); 32 ... mortar; 4 ... workpiece is fire-resistantMaterial layer; 41 ... refractory material (unshape refractory); 5 ... thermal insulation barriers; 51 ... covering;61 ... molten steel (motlten metal); G ... gap; H ... through hole; T2 ... the thickness of iron sheet; T5The thickness of thermal insulation barriers; W ... the width in gap.
Claims (4)
1. the lining of molten metal container structure, it accommodates motlten metal,
The lining of described molten metal container is constructed and is characterised in that,
Possess:
Iron sheet, this iron sheet forms the outermost layer of described molten metal container, has multiple by lateral surfaceThrough hole with medial surface perforation;
Individual layer or double-deck permanent refractory material layer, this permanent refractory material layer is arranged at described ironThe inner side of skin;
Workpiece refractory masses, this workpiece refractory masses is arranged at described permanent refractory material layerInner side, forms the scope of operation that contacts with described motlten metal, this workpiece refractory masses at least onePart is made up of unshape refractory; And
Multiple thermal insulation barriers, the polygon parts that above-mentioned multiple thermal insulation barriers are sheets, are arranged on described ironBetween skin and described permanent refractory material layer or double-deck described permanent refractory material layer each other itBetween, and along the medial surface of described iron sheet in abutting connection with configuration,
A described thermal insulation barriers and with this thermal insulation barriers in abutting connection with described in other of configuration in thermal insulation barriersBetween at least one, be formed with gap,
Described gap is positioned on described through hole, and has more than the thickness of described thermal insulation barriersWidth.
2. the lining of molten metal container according to claim 1 structure, is characterized in that,
The width in described gap is below the thickness of described iron sheet.
3. the lining of molten metal container according to claim 1 and 2 structure, its featureBe,
Described thermal insulation barriers is accommodated in the covering of water proofing property.
4. a molten metal container, it accommodates motlten metal,
Described molten metal container is characterised in that,
Possess:
Iron sheet, this iron sheet forms the outermost layer of described molten metal container, has multiple by lateral surfaceThrough hole with medial surface perforation;
Individual layer or double-deck permanent refractory material layer, this permanent refractory material layer is arranged at described ironThe inner side of skin;
Workpiece refractory masses, this workpiece refractory masses is arranged at described permanent refractory material layerInner side, forms the scope of operation that contacts with described motlten metal, this workpiece refractory masses at least onePart is made up of unshape refractory; And
Multiple thermal insulation barriers, the polygon parts that above-mentioned multiple thermal insulation barriers are sheets, are arranged on described ironBetween skin and described permanent refractory material layer or double-deck described permanent refractory material layer each other itBetween, and along the medial surface of described iron sheet in abutting connection with configuration,
A described thermal insulation barriers and with this thermal insulation barriers in abutting connection with described in other of configuration in thermal insulation barriersBetween at least one, be formed with gap,
Described gap is positioned on described through hole, and has more than the thickness of described thermal insulation barriersWidth.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012123106 | 2012-05-30 | ||
| JP2012-123106 | 2012-05-30 | ||
| PCT/JP2013/065045 WO2013180219A1 (en) | 2012-05-30 | 2013-05-30 | Lining structure for molten-metal container |
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| Publication Number | Publication Date |
|---|---|
| CN104334750A CN104334750A (en) | 2015-02-04 |
| CN104334750B true CN104334750B (en) | 2016-05-11 |
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| CN201380028001.0A Active CN104334750B (en) | 2012-05-30 | 2013-05-30 | The lining structure of molten metal container |
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| Country | Link |
|---|---|
| JP (1) | JP5494898B1 (en) |
| KR (1) | KR101571644B1 (en) |
| CN (1) | CN104334750B (en) |
| IN (1) | IN2014KN02725A (en) |
| WO (1) | WO2013180219A1 (en) |
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| TWI750205B (en) * | 2016-08-24 | 2021-12-21 | 美商維蘇威美國公司 | Metallurgical vessel lining with enclosed metal layer and process for minimization of oxidation of molten metal |
| US10295260B2 (en) | 2016-10-18 | 2019-05-21 | Saint-Gobain Ceramics & Plastics, Inc. | Ceramic liner and method of forming |
| DE102020210913A1 (en) * | 2020-08-28 | 2022-03-03 | Oskar Frech Gmbh + Co. Kg | Casting component with anti-corrosion layer structure |
| JP7347393B2 (en) * | 2020-10-16 | 2023-09-20 | Ｊｆｅスチール株式会社 | Shell structure of molten metal storage container and molten metal storage container |
| KR20230090630A (en) * | 2021-12-15 | 2023-06-22 | 재단법인 포항산업과학연구원 | Furnace wall having excellent heat loss reduction effect and corrosion reduction effect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194730A (en) * | 1977-12-27 | 1980-03-25 | Foseco Trading Ag | Molten metal handling vessels |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5832130Y2 (en) * | 1978-12-02 | 1983-07-16 | 川崎製鉄株式会社 | Closed metal smelting vessel |
| JPH11217261A (en) * | 1998-01-29 | 1999-08-10 | Nkk Corp | Molten metal-holding vessel |
| JP4506607B2 (en) * | 2005-07-29 | 2010-07-21 | Ｊｆｅスチール株式会社 | Molten metal container |
| JP5680297B2 (en) * | 2009-11-17 | 2015-03-04 | Ｊｆｅスチール株式会社 | Refractory lining structure for steelmaking containers |
-
2013
- 2013-05-30 WO PCT/JP2013/065045 patent/WO2013180219A1/en active Application Filing
- 2013-05-30 JP JP2013549446A patent/JP5494898B1/en not_active Expired - Fee Related
- 2013-05-30 IN IN2725KON2014 patent/IN2014KN02725A/en unknown
- 2013-05-30 KR KR1020147032858A patent/KR101571644B1/en active IP Right Grant
- 2013-05-30 CN CN201380028001.0A patent/CN104334750B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194730A (en) * | 1977-12-27 | 1980-03-25 | Foseco Trading Ag | Molten metal handling vessels |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150004880A (en) | 2015-01-13 |
| CN104334750A (en) | 2015-02-04 |
| JPWO2013180219A1 (en) | 2016-01-21 |
| KR101571644B1 (en) | 2015-11-24 |
| JP5494898B1 (en) | 2014-05-21 |
| WO2013180219A1 (en) | 2013-12-05 |
| IN2014KN02725A (en) | 2015-05-08 |
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