CN104334750A - Lining structure for molten-metal container - Google Patents
Lining structure for molten-metal container Download PDFInfo
- Publication number
- CN104334750A CN104334750A CN201380028001.0A CN201380028001A CN104334750A CN 104334750 A CN104334750 A CN 104334750A CN 201380028001 A CN201380028001 A CN 201380028001A CN 104334750 A CN104334750 A CN 104334750A
- Authority
- CN
- China
- Prior art keywords
- thermal insulation
- insulation barriers
- iron sheet
- refractory
- molten metal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- 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
A lining structure for a molten-metal container for containing a molten metal, wherein the lining structure is provided with: a steel shell constituting the outermost layer of the molten-metal container, the steel shell having a plurality of through-holes passing through an outer surface and an inner surface; a single-layer or double-layer permanent refractory layer provided on the inner side of the steel shell; a workpiece refractory layer provided on the inner side of the permanent refractory layer and at least partially composed of a castable refractory, the workpiece refractory layer forming an operation surface contacting the molten metal; and a plurality of layers of an insulating material that is a sheet-shaped polygonal member adjacently disposed with respect to the inner surface of the steel shell, the layers of the insulating material being installed between the steel shell and the permanent refractory layer or between two layers of the permanent refractory layer. A gap is formed between one of the insulating layers and at least one of the other insulating layers adjacently disposed with respect to the insulating layer, the gap being positioned on a through hole and having a thickness equal to or greater than the insulating material.
Description
Technical field
The present invention relates to the lined piping construct of molten metal container.
Background technology
The molten metal container of molten metal such as storage molten iron, molten steel etc. is (below, also referred to as " container ".) lined piping construct there is structure as outermost iron sheet supporting refractory materials.
Amorphous refractory and unshape refractory is had as the refractory materials used in molten metal container.Especially unshape refractory is also referred to as mould material, because it is installed easily, is extensively used as the refractory materials forming the workpiece refractory masses contacted with molten metal.
Unshape refractory is generally in the mixture of the powder of the high-melting-point substances such as aluminium, grain, add water make its inflow container that flows, and becomes liner shape.
But the fusing point of the metals such as iron is mostly up to hundreds of ~ 1,000 hundreds ofs DEG C, so molten metal container needs resistivity against fire and thermal insulation.
In the past, as the method for molten metal container being given to thermal insulation, propose the method for the rear side insertion thermal insulation barriers to workpiece refractory masses, For example, Patent Document 1 discloses be microporosity molding and the thermal insulation barriers of main raw with silicon dioxide microparticle.
Patent documentation 1: Japanese Unexamined Patent Publication 2008-249317 publication
When molten steel etc. is loaded molten metal container, if remain moisture in the unshape refractory forming workpiece refractory masses, then water vapor pressure such as rises more than 10 air pressure at 200 DEG C therein, and unshape refractory may burst and damaged.
Therefore, when using molten metal container, heating being implemented in advance to unshape refractory and makes it dry (hereinafter also referred to as " dry in advance ".)。In order to prevent unshape refractory damaged because of water vapor pressure, carry out dry in advance at relatively low temperatures for a long time.
Dry in advance because using burner etc. to carry out from the inner side of container, so the position of outside surface side at unshape refractory, low to less than 100 DEG C in pre-dry starting stage temperature, become liquid water from a part of condensation of the inside steam out of unshape refractory.Then, the position of the outside surface side of unshape refractory also becomes more than 100 DEG C, and moisture becomes steam.
Be formed with communicating pores at the outermost iron sheet as container, externally discharged from this communicating pores from unshape refractory steam out by dry in advance.
But, when the rear side of workpiece refractory masses inserts thermal insulation barriers, hinder the exhaust from communicating pores.Further, the inner surface side of unshape refractory is solidified by drying in advance, part sintering, so the steam of not discharging from communicating pores is difficult to discharge from inner surface side and stay inside.
Therefore, no matter whether remain moisture in the inside of unshape refractory, all think that drying finishes in advance by mistake, and molten metal is loaded container, and the explosion of unshape refractory may be caused damaged.
Summary of the invention
The present invention completes in view of the above circumstances, and object is in the lined piping construct of the molten metal container being provided with thermal insulation barriers, makes the air permeability in the drying in advance of unshape refractory good.
The present inventors have carried out wholwe-hearted research to achieve these goals.Found that: by specifically configuring the thermal insulation barriers of the polygonal features as sheet, thus in the drying in advance of unshape refractory, the air permeability of steam can be made good, this completes the present invention.
That is, the invention provides following (1) ~ (3).
(1) a kind of lined piping construct of molten metal container, it accommodates molten metal, in the lined piping construct 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 outer side and the through communicating pores of medial surface; The permanent refractory material layer of individual layer or bilayer, 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 contacted with above-mentioned molten metal, being made up of unshape refractory at least partially of this workpiece refractory masses; And multiple thermal insulation barriers, multiple thermal insulation barriers above-mentioned are polygonal features of sheet, be arranged between above-mentioned iron sheet and above-mentioned permanent refractory material layer or bilayer above-mentioned permanent refractory material layer each other, and adjoin configuration along the medial surface of above-mentioned iron sheet, an above-mentioned thermal insulation barriers and and this thermal insulation barriers adjoin in other above-mentioned thermal insulation barriers of configuration between at least one to be formed with gap, above-mentioned gap is positioned on above-mentioned communicating pores, and has the width of more than the thickness of above-mentioned thermal insulation barriers.
(2), in the lined piping construct of the molten metal container recorded in above-mentioned (1), the width in above-mentioned gap is below the thickness of above-mentioned iron sheet.
(3), in the lined piping construct of the molten metal container recorded in above-mentioned (1) or (2), above-mentioned thermal insulation barriers is accommodated in the Abdeckteil of water-repellancy.
According to the present invention, in the lined piping construct of molten metal container being provided with thermal insulation barriers, the air permeability in the drying in advance of unshape refractory can be made good.
Accompanying drawing explanation
Fig. 1 is a side-view part for ladle 1 being cut and illustrate.
Fig. 2 is the schematic diagram observing multiple thermal insulation barriers 5 that the medial surface shape along iron sheet 2 configures from the inner side of ladle 1.
Fig. 3 represents that the width of clearance G is relative to the ratio of the thickness of thermal insulation barriers 5, the chart with the relation of the temperature by iron sheet 2 side of clearance G.
Fig. 4 (a) represents make the thickness of iron sheet 2 be 30mm and make the width of the clearance G of thermal insulation barriers 5 be the infrared thermal imagery of the ladle 1 of 40 ~ 50mm, and Fig. 4 (b) is the chart of the temperature distribution of line A and B represented in the infrared thermal imagery of Fig. 4 (a).
Fig. 5 represents that the width of clearance G is relative to the ratio of the thickness of iron sheet 2, the chart with the relation of the radiation thermal discharge of iron sheet clearance portion 2a.
Fig. 6 (a) represents make the thickness of iron sheet 2 be 30mm and make the width of the clearance G of thermal insulation barriers 5 be the infrared thermal imagery of the ladle 1 of 20 ~ 30mm, and Fig. 6 (b) is the chart of the temperature distribution of line A and B represented in the infrared thermal imagery of Fig. 6 (a).
Embodiment
Below, one embodiment of the present invention is described.The embodiment below illustrated is for the application examples of collecting as the ladle 1 of the molten steel 61 of molten metal.
Fig. 1 is side-view ladle 1 being cut a part and illustrates.Ladle 1 shown in Fig. 1 is accommodated and is maintained by converter by the converted molten steel 61 of molten iron.Float at the liquid level of molten steel 61 and have slag (not shown).In ladle 1, carry out the process of the secondary refining removing impurity or add Addition ofelements from molten steel 61.Molten steel 61 after secondary refining terminates is carried by ladle 1, is supplied to continuous casting working procedure.
The lined piping construct of ladle 1 has iron sheet 2, permanent refractory material layer 3 and workpiece refractory masses 4 substantially successively from outside.Further, grade to be provided with in the side surface part of ladle 1 and play the thermal insulation barriers 5 of heat insulating function.
Below, first according to Fig. 1, permanent refractory material layer 3 and workpiece refractory masses 4 are described.
Permanent refractory material layer 3 is arranged at the inner side of iron sheet 2.The brick layer of installing safely is guaranteed in order to make molten steel 61 not leak when permanent refractory material layer 3 is and has come off in workpiece refractory masses 4 (part) damage described later.Permanent refractory material layer 3 can be provided with individual layer, also can be provided with bilayer as shown in Figure 1.
As forming the refractory materials of permanent refractory material layer 3 (also referred to as " permanent refractory material ".) 31 such as use the amorphous refractory (forming brick) such as agalmatolite firebricks.As shown in Figure 1, refractory materials 31 uses mortar 32 to lay bricks as joint filler.
Even if peel off for workpiece refractory materials the reason that molten steel 61 also do not spill immediately for some reason, the thickness of permanent refractory material layer 3 is preferably more than 40mm, for the reason preventing molten steel 61 from being flowed out by seam, is more preferably double-deck installation.
Workpiece refractory masses 4 is arranged at the inner side of permanent refractory material layer 3.Workpiece refractory masses 4 is the layers forming the scope of operation contacted with molten steel 61.
Illustrate in Fig. 1 and used unshape refractory as forming the refractory materials of workpiece refractory masses 4 (also referred to as " workpiece refractory materials ".) 41 example.When using unshape refractory 41, make at aluminum oxide (Al
2o
3), add water in the mixture of the powder of the high-melting-point substances such as magnesium oxide (MgO), grain and the material that makes it flow, flow between permanent refractory material layer 3 and pattern (not shown), and form liner shape.
But if unshape refractory 41 remains moisture when molten steel 61 being enclosed ladle 1, then such as rise more than 10 air pressure at 200 DEG C in the internal steam pressure of unshape refractory 41, unshape refractory 41 may burst and damaged.Therefore, in order to prevent such breakage, carry out dry in advance under lower temperature for a long time.
Generally, burner etc. is used to carry out from the inner side (that is, the scope of operation side of workpiece refractory masses 4) of ladle 1 dry in advance.Therefore, the outside surface side of unshape refractory 41 (namely, workpiece refractory masses 4 by iron sheet 2 side) position in the pre-dry starting stage, temperature is low to less than 100 DEG C, becomes liquid water from a part of condensation of the inside steam out of unshape refractory 41.Then, pre-dry intermediate stage ~ final stage, the position of the outside surface side of unshape refractory 41 also becomes more than 100 DEG C, and moisture becomes steam, discharges from the communicating pores H described later being formed at iron sheet 2.
In order to reduce repair rate and improve operating rate, the thickness of workpiece refractory masses 4 (unshape refractory 41) is more thick better.But, if use the initial difference with the thickness in latter stage very ambassador's internal capacity change greatly, then liquid level, can maintenance dose variation and operability is reduced, or container weight increase makes equipment scale change greatly.For this reason, the thickness of workpiece refractory masses 4 (unshape refractory 41) is preferably 100 ~ 250mm, with near the border of cushion part (bottom surface sections) because of be exposed to steel flow, residual slag and thicker, other positions are thinner, thus to be more preferably according to position to change thickness.
Next, iron sheet 2 is described.Iron sheet 2 is to support the steely structure of refractory materials (refractory materials 31, refractory materials 41) as the outermost layer of ladle 1.
The lower limit of the thickness (in Fig. 1, the length shown in T2) of iron sheet 2 is determined by Strength co-mputation, although thicker then more difficult distortion thus the life-span longer, consider expense and weight limits, adopt the example of 30 ~ 90mm more.
Be formed the outer side of iron sheet 2 and the through multiple communicating pores H of medial surface at iron sheet 2.Make by above-mentioned in advance dry from unshape refractory 41 steam out by communicating pores H.
The aperture of communicating pores H is not particularly limited, but from the viewpoint of the blocking preventing refractory material piece etc. from producing, is preferably more than 6mm.On the other hand, as long as prevent blocking from just fully can guarantee air permeability, so be at below 30mm mostly.
Next, thermal insulation barriers 5 is described.Thermal insulation barriers 5 is at least installed on the side surface part of ladle 1, but also can be installed on cushion part (bottom surface sections).
When arranging double-deck permanent refractory material layer 3, the installation site of thermal insulation barriers 5 can between this bilayer.But, use from the temperature that can reduce thermal insulation barriers 5, (such as more than 2 years) the reason consideration of heat-proof quality can be played for a long time, as shown in Figure 1, preferably thermal insulation barriers 5 is arranged between iron sheet 2 and permanent refractory material layer 3.
Below, be described for the situation of installing thermal insulation barriers 5 between iron sheet 2 and permanent refractory material layer 3, but the present invention is not limited to this.
Thermal insulation barriers 5 is parts of sheet, such as, by with silicon-dioxide (SiO
2), aluminum oxide (Al
2o
3) etc. particulate be main raw microporosity molding form.
But, if by the microporosity material of the fine particle formation such as silicon-dioxide and the contact with moisture of liquid state, can flow and lose thermal insulation.Therefore, when using add water and install unshape refractory 41, the thermal insulation of thermal insulation barriers 5 may reduce.
Therefore, the Abdeckteil 51 preferably thermal insulation barriers 5 being accommodated in water-repellancy prevents the deterioration because moisture produces.As long as the material of Abdeckteil 51 has water-repellancy to be not particularly limited, such as, can enumerate resin molding etc., specifically, such as, the resin such as polypropylene, polyethylene is all applicable.In addition, in order to improve moisture resistance, also use by the material of above-mentioned resin by aluminium foil laminate.
The thickness of thermal insulation barriers 5 is (in Fig. 1, length shown in T5) be not particularly limited, even if but consider from the object that also can prevent molten steel 61 melting loss thermal insulation barriers 5 from also expanding when making molten steel 61 contact with thermal insulation barriers 5 for some reason on a large scale, the thickness of thermal insulation barriers 5 is preferably below 15mm, is more preferably 3 ~ 10mm.In addition, the thickness of thermal insulation barriers 5 is the thickness comprising Abdeckteil 51.
Fig. 2 is the schematic diagram observing multiple thermal insulation barriers 5 that the medial surface along iron sheet 2 configures from the inner side of ladle 1.The structure beyond removing iron sheet 2 and thermal insulation barriers 5 is eliminated in Fig. 2.
In Fig. 2, the thermal insulation barriers 5 showing sheet is oblong-shaped.But, as long as the shape polygonal shape of thermal insulation barriers 5 is not particularly limited, except rectangle, such as, can enumerate the shapes such as trapezoidal, trilateral.Specifically, such as, when 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, configure with adjoining each other.Such as utilize the adhesive tape that material is identical with Abdeckteil 51 (with reference to Fig. 1), thermal insulation barriers 5 is fixed on the medial surface of iron sheet 2.
Now, between at least one thermal insulation barriers 5 in a thermal insulation barriers 5 and other thermal insulation barriers 5 of being adjacent, clearance G is formed with.
Such as, in Fig. 2, adjoin around thermal insulation barriers 5a and be configured with other thermal insulation barriers 5b ~ 5e.Wherein, the position between thermal insulation barriers 5a and thermal insulation barriers 5b and between thermal insulation barriers 5a and thermal insulation barriers 5d, is formed with clearance G respectively.Therefore, in the Fig. 2 eliminating permanent refractory material layer 3 and workpiece refractory masses 4, iron sheet 2 exposes from clearance G.
Now, thermal insulation barriers 5 configures in the mode clearance G of formation be positioned on communicating pores H.In addition, " clearance G is positioned on communicating pores H " comprises the concept forming the situation that the thermal insulation barriers 5 of clearance G blocks a part of communicating pores H and the situation that the thermal insulation barriers 5 forming clearance G is not blocked communicating pores H and make it expose.
In addition, the communicating pores H along the linearly arrangement of clearance G being formed as linearity has been shown in Fig. 2, but the arrangement of communicating pores H is not limited to this.
And, in the present invention, make the width (in Fig. 2, the length shown in W) of the clearance G of thermal insulation barriers 5 more than the thickness (in Fig. 1, the length shown in T5) of above-mentioned thermal insulation barriers 5.The lower value of the width of such clearance G is for guaranteeing that the viewpoint of air permeability sets.
The mode that the present inventors are 1 ~ 3mm with the width of clearance G at first configures the thermal insulation barriers 5 that thickness is 6mm, and afterwards, pre-dry required time significantly extends.The result disassembling investigation after using shows, this is because the mortar 32 used when installing permanent refractory material layer 3 invades the clearance G of thermal insulation barriers 5 and destroys the air permeability of clearance G.
Therefore, the present inventors configure thermal insulation barriers 5 to make the mode that the width of clearance G is various size, observe rising from the steam of communicating pores H generation and the temperature of iron sheet 2 in drying in advance.Consequently, if the thickness of thermal insulation barriers 5 is 6mm, then when the short of width 6mm of clearance G, pre-dry required time extends, if the thickness of thermal insulation barriers 5 is 3mm, then when the short of width 3mm of clearance G, pre-dry required time extends.
In order to verify this phenomenon, inferred the temperature invaded in the drying in advance of the mortar 32 of the clearance G of thermal insulation barriers 5 by Calculation of Heat Transfer.
Fig. 3 represents that the width of clearance G is relative to the ratio of the thickness of thermal insulation barriers 5, the chart with the relation of the temperature by iron sheet 2 side of clearance G.In the chart of Fig. 3, transverse axis represents the ratio (unit: %) of the width of clearance G relative to the thickness of thermal insulation barriers 5.On the other hand, the longitudinal axis be the outside surface side temperature of the unshape refractory 41 forming workpiece refractory masses 4 be 120 DEG C, vapour pressure is pre-dry intermediate stage of 2 air pressure, calculates the value (unit: DEG C) of the temperature by iron sheet 2 side of the clearance G that mortar 32 has invaded.
According to the chart of Fig. 3, to confirm when the value of transverse axis is less than 100% (namely, when the width of clearance G is less than the thickness of thermal insulation barriers 5), the value of the longitudinal axis (namely, the temperature by iron sheet 2 side of the clearance G that mortar 32 has invaded) lower than 100 DEG C, the evaporation having invaded the adhesive water of the mortar 32 of clearance G is slow, and condensation when passing through from the steam that unshape refractory 41 produces, and obviously destroys air permeability.
As mentioned above, in the present invention, make the width of the clearance G of thermal insulation barriers 5 more than the thickness of thermal insulation barriers 5.Thus, in the ladle 1 being provided with thermal insulation barriers 5, the air permeability in the drying in advance of unshape refractory 41 also can be made good.
In addition, from the reduction of effect of heat insulation being caused to suppress for minimal viewpoint is considered because forming clearance G, preferably make the width of the clearance G of thermal insulation barriers 5 iron sheet 2 thickness (in Fig. 1, the length shown in T2) below.Next, the higher limit of the width of such clearance G is described.
Fig. 4 (a) be represent that the thickness of iron sheet 2 is 30mm, ladle that the width of the clearance G of thermal insulation barriers 5 is 40 ~ 50mm 1 (diameter: 4.0m, highly: infrared thermal imagery 4.5m), Fig. 4 (b) is the chart of the temperature distribution of line A and B represented in the infrared thermal imagery of Fig. 4 (a).
In more detail, the infrared thermal imagery of Fig. 4 (a) is the figure of the ladle 1 being accommodated with the state of molten steel 61 that slightly downside observation is from the side sling by lifting machine, and the position of brighter (of light color) represents that temperature is higher.
In addition, the chart of Fig. 4 (b) be in the infrared thermal imagery of Fig. 4 (a) × to start and the temperature distribution of the scope (line A and B) terminated at the other end.The length of line A and B is respectively 1.05m and 1.08m.In the chart of Fig. 4 (b), transverse axis represent with × for the pixel count of line A and B of left end, the longitudinal axis represents temperature (unit: DEG C).
Here, line A is such as conceived to.Line A × temperature be about 240 DEG C.Online A, is positioned at the position of clearance G (hereinafter also referred to as " iron sheet clearance portion 2a " in iron sheet 2.) bright a little in Fig. 4 (a), in chevron in the chart of Fig. 4 (b), except × beyond 2 positions in addition.Iron sheet clearance portion 2a is higher than other position about 20 ~ 30 DEG C, thinks that temperature rises.
According to Stefan-Boltzmann's law, the biquadratic of radiation heat release externally and the hull-skin temperature of iron sheet 2 is proportional, and in iron sheet clearance portion 2a, radiation heat release externally adds 20%.Reduce from the viewpoint of suppression effect of heat insulation, the width of the clearance G of preferred thermal insulation barriers 5 is as far as possible little.
But the lower value of the width of above-mentioned clearance G, namely the thickness of thermal insulation barriers 5 is generally about 1 ~ 20mm, so be difficult to the width correctly arranging clearance G in conjunction with lower value.
Therefore, if increase the width of clearance G, the hull-skin temperature of iron sheet 2 rises, according to Stefan-Boltzmann's law, the biquadratic of radiation heat release externally and the hull-skin temperature of iron sheet 2 is proportional, is conceived to this and is inferred the condition not making radiation heat release externally increase considerably by Calculation of Heat Transfer.
Fig. 5 represents that the width of clearance G is relative to the ratio of the thickness of iron sheet 2, the chart with the relation of the radiation thermal discharge of iron sheet clearance portion 2a.
In the chart of Fig. 5, transverse axis represents the ratio (unit: %) of the width of clearance G relative to the thickness of iron sheet 2.On the other hand, the longitudinal axis is the value calculating iron sheet clearance portion 2a radiation heat release externally under the state that molten steel 61 is accommodated in ladle 1, be make transverse axis be 80% calculation result be the index of 100.
According to the chart of Fig. 5, when the width of clearance G is larger than the thickness of iron sheet 2, radiation heat release sharply increases.
Fig. 6 (a) is the infrared thermal imagery representing that the thickness of iron sheet 2 is 30mm, the width of the clearance G of thermal insulation barriers 5 is the ladle 1 of 20 ~ 30mm, and Fig. 6 (b) is the chart of the temperature distribution of line A and B represented in the infrared thermal imagery of Fig. 6 (a).The basic concept of Fig. 6 (a) and (b) is identical with Fig. 4 (a) and (b) respectively, so omit the description, but the length of line A and B is respectively 0.58m and 1.10m.
From Fig. 6 (a) and (b), the temperature at the iron sheet clearance portion 2a place thought in Fig. 4 (a) and (b) rises and eliminates.
Therefore, consider from the reason suppressing effect of heat insulation significantly to reduce, the width of the clearance G of thermal insulation barriers 5 is 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 these embodiments.
< example 1>
At ladle 1 (diameter: the 4.0m, highly: 4.5m) of Fig. 1, in the inner side of iron sheet 2 (thickness: 30mm), use agalmatolite firebrick as refractory materials 31, using mortar 32 as joint filler, and form permanent refractory material layer 3 (thickness: 50mm).Further, the unshape refractory 41 making alumina-silica magnesia is the mix moisture of quality 6%, flows between permanent refractory material layer 3 and pattern (not shown), and forms workpiece refractory masses 4 (thickness: 120mm).
In addition, except cushion part, between iron sheet 2 and permanent refractory material layer 3, there is also mounted the thermal insulation barriers 5 (thickness: 5mm) of the sheet being accommodated in the Abdeckteil 51 that polyethylene resin film (in order to improve moisture resistance by the material of aluminium foil laminate) is made.Thermal insulation barriers 5 is made up of the microporosity molding being main raw with the particulate of silicon-dioxide and aluminum oxide, and its shape is rectangle (500 ~ 1000mm × 350 ~ 500mm).
Now, utilize the adhesive tape that material is identical with Abdeckteil 51, multiple thermal insulation barriers 5 are fixed on the medial surface of iron sheet 2 and configure with adjoining each other.At iron sheet 2 in being linearly formed with communicating pores H (aperture: 12mm), but as shown in Figure 2, be formed with in the upper of thermal insulation barriers 5 clearance G be positioned on communicating pores H below.
Manually the installation of thermal insulation barriers 5 is carried out in operation.Carry the pencil that diameter is 8mm when mounted, notice and make the width of clearance G be the size of 2 times from the diameter of this pencil to diameter.That is, the width of clearance G is made to be 8 ~ 16mm.By such installation, clearance G is by about 1/4th of communicating pores H being blocked by thermal insulation barriers 5 of locating.
< example 2>
Make the width of clearance G be 20 ~ 40mm, other is identical with example 1 installs thermal insulation barriers 5.Carry the pole that diameter is 20mm when mounted, notice and make the width of clearance G be the size of 2 times from the diameter of this pole to diameter.By increasing the allowed band at interval, can use larger thermal insulation barriers, installation improves.
< comparative example 1>
Make the width of clearance G be 2 ~ 4mm, other is identical with example 1 installs thermal insulation barriers 5.Carry the pole that diameter is 2mm when mounted, notice and make the width of clearance G be the size of 2 times from the diameter of this pole to diameter.
< evaluates >
In each case, at inflow unshape refractory 41 after forming workpiece refractory masses 4, make each conditions such as Heating temperature in the same manner, use burner to carry out from the scope of operation side of workpiece refractory masses 4 dry in advance, from pre-dry, measure required time.In addition, arrived the dehydration temperaturre that is 150 DEG C of high-alumina cement by iron sheet hull-skin temperature, judge to terminate drying in advance.
Be that the index of 100 is to evaluate the required time of each example with the required time of example 1.Result as described in Table 1.Can be evaluated as: index is less, the time to drying in advance terminates is shorter, and the air permeability in advance in drying is better.
In addition, in each case, the ladle 1 after drying in advance terminates is received molten steel 61 and brings into use, and according to the infrared thermal imagery after 3 days, the temperature evaluating iron sheet clearance portion 2a rises.The maximum value of the iron sheet clearance portion 2a of iron sheet 2 and the temperature difference at other position (unit: DEG C) as described in Table 1.Can be evaluated as: the temperature difference is less, the temperature of iron sheet clearance portion 2a rises more suppressed, and thermal insulation is better.
In addition, in each case, the ladle 1 after drying in advance terminates is received molten steel 61 and brings into use, and checks and observes the refractory materials situation after 14 days, evaluates with or without stripping loss.Peel off loss different from normal melting loss, for the inside because of refractory materials exception and peel off the thickness of more than 10mm, can enumerate inabundant drying is in advance one of reason.
[table 1]
1st table
Result according to above-mentioned table 1, example 1,2 is compared with comparative example 1, and pre-dry required time is short, and the air permeability in advance in drying is good.In addition, comparative example 1 is identified the stripping loss in use, and time of drying, how long drying was all possible insufficient in advance.
In addition, known, example 1 is compared with example 2, and the iron sheet clearance portion 2a of iron sheet 2 and having a narrow range of temperature of other positions, the temperature of iron sheet clearance portion 2a rises suppressed.In addition, in example 1, the temperature of iron sheet clearance portion 2a rises below 10 DEG C, being increased in insignificant scope of radiation heat release.
The explanation of Reference numeral
1 ... ladle (molten metal container); 2 ... iron sheet; 2a ... iron sheet clearance portion; 3 ... permanent refractory material layer; 31 ... refractory materials (amorphous refractory); 32 ... mortar; 4 ... workpiece refractory masses; 41 ... refractory materials (unshape refractory); 5 ... thermal insulation barriers; 51 ... Abdeckteil; 61 ... molten steel (molten metal); G ... gap; H ... communicating pores; T2 ... the thickness of iron sheet; T5 ... the thickness of thermal insulation barriers; W ... the width in gap.
Claims (3)
1. a lined piping construct for molten metal container, it accommodates molten metal,
The feature of the lined piping construct of described molten metal container is,
Possess:
Iron sheet, this iron sheet forms the outermost layer of described molten metal container, has multiple by outer side and the through communicating pores of medial surface;
The permanent refractory material layer of individual layer or bilayer, this permanent refractory material layer is arranged at the inner side of described iron sheet;
Workpiece refractory masses, this workpiece refractory masses is arranged at the inner side of described permanent refractory material layer, forms the scope of operation contacted with described molten metal, being made up of unshape refractory at least partially of this workpiece refractory masses; And
Multiple thermal insulation barriers, multiple thermal insulation barriers above-mentioned are polygonal features of sheet, be arranged between described iron sheet and described permanent refractory material layer or bilayer described permanent refractory material layer each other, and along the adjacent configuration of medial surface of described iron sheet,
A described thermal insulation barriers and and this thermal insulation barriers adjoin configuration other described in be formed with gap between at least one in thermal insulation barriers,
Described gap is positioned on described communicating pores, and has the width of more than the thickness of described thermal insulation barriers.
2. the lined piping construct of molten metal container according to claim 1, is characterized in that,
The width in described gap is below the thickness of described iron sheet.
3. the lined piping construct of molten metal container according to claim 1 and 2, is characterized in that,
Described thermal insulation barriers is accommodated in the Abdeckteil of water-repellancy.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104334750A true CN104334750A (en) | 2015-02-04 |
| CN104334750B CN104334750B (en) | 2016-05-11 |
Family
ID=49673406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380028001.0A Active CN104334750B (en) | 2012-05-30 | 2013-05-30 | The lining structure of molten metal container |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5494898B1 (en) |
| KR (1) | KR101571644B1 (en) |
| CN (1) | CN104334750B (en) |
| IN (1) | IN2014KN02725A (en) |
| WO (1) | WO2013180219A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116079037A (en) * | 2023-01-30 | 2023-05-09 | 江苏沙钢集团有限公司 | Refractory material masonry scheme for reducing surface temperature of ladle cladding |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2018075680A1 (en) | 2016-10-18 | 2018-04-26 | 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194730A (en) * | 1977-12-27 | 1980-03-25 | Foseco Trading Ag | Molten metal handling vessels |
| JP2007030020A (en) * | 2005-07-29 | 2007-02-08 | Jfe Steel Kk | Vessel for holding molten metal |
| JP2011105986A (en) * | 2009-11-17 | 2011-06-02 | Jfe Steel Corp | Refractory-lining structure of vessel for iron-making |
Family Cites Families (2)
| 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 |
-
2013
- 2013-05-30 CN CN201380028001.0A patent/CN104334750B/en active Active
- 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
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194730A (en) * | 1977-12-27 | 1980-03-25 | Foseco Trading Ag | Molten metal handling vessels |
| JP2007030020A (en) * | 2005-07-29 | 2007-02-08 | Jfe Steel Kk | Vessel for holding molten metal |
| JP2011105986A (en) * | 2009-11-17 | 2011-06-02 | Jfe Steel Corp | Refractory-lining structure of vessel for iron-making |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116079037A (en) * | 2023-01-30 | 2023-05-09 | 江苏沙钢集团有限公司 | Refractory material masonry scheme for reducing surface temperature of ladle cladding |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013180219A1 (en) | 2013-12-05 |
| IN2014KN02725A (en) | 2015-05-08 |
| KR20150004880A (en) | 2015-01-13 |
| JPWO2013180219A1 (en) | 2016-01-21 |
| KR101571644B1 (en) | 2015-11-24 |
| JP5494898B1 (en) | 2014-05-21 |
| CN104334750B (en) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104334750A (en) | Lining structure for molten-metal container | |
| US4675879A (en) | Induction furnaces | |
| JP6472286B2 (en) | Molten metal holding device | |
| JP4506607B2 (en) | Molten metal container | |
| CN108080591B (en) | Amorphous strip integrated spray belt package and package manufacturing method thereof | |
| CN112264610A (en) | Hot-metal bottle and preparation method thereof | |
| CN111365997A (en) | Furnace top sealing device for producing large-crystal fused magnesia ore heating furnace | |
| US4330107A (en) | Teapot ladle and method of use | |
| US5511762A (en) | Consumable form with degradable lining | |
| KR100967054B1 (en) | Apparatus for removing water from fireproofing wall of molten-metal container | |
| JP4512560B2 (en) | Continuous casting nozzle | |
| CN103387337B (en) | For the production of the hot slag holding furnace of mineral wool | |
| JP4082644B2 (en) | Lined refractory for RH vacuum degassing furnace | |
| JP7323773B2 (en) | HEATING METHOD AND HEATING DEVICE FOR SEPARATE TRUCK CAR | |
| CN209991759U (en) | Side-blown converter hearth | |
| CN109971901A (en) | A kind of application method keeping the temperature slag ladle, slag ladle and carriage and slag ladle and carriage | |
| JP3180665U (en) | Molten metal ladle | |
| JP5983270B2 (en) | Canopy for vacuum degassing tank | |
| JP3659759B2 (en) | Molten metal filtration storage tank and its lining brick | |
| JPH04100672A (en) | Molten metal holding vessel | |
| JP5589830B2 (en) | Vanadium pentoxide melting equipment | |
| JP2003103358A (en) | Permanent brick with micro-porous heat-insulating material | |
| JPH04329840A (en) | Molten metal filtrate-incorporating vessel | |
| JP3022822U (en) | Ladle for casting | |
| JP2008280557A (en) | Gas-blowing plug for refining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |