CN205576184U - Good blast furnace crucibe of heat conduction - Google Patents

Good blast furnace crucibe of heat conduction Download PDF

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Publication number
CN205576184U
CN205576184U CN201520904524.3U CN201520904524U CN205576184U CN 205576184 U CN205576184 U CN 205576184U CN 201520904524 U CN201520904524 U CN 201520904524U CN 205576184 U CN205576184 U CN 205576184U
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China
Prior art keywords
blast furnace
heat
brick fuel
hearth
layer
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Active
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CN201520904524.3U
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Chinese (zh)
Inventor
卢正东
刘栋梁
陈令坤
邹祖桥
李华
余立
欧阳珉路
余珊珊
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Group Corp
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Abstract

The ability discloses a good blast furnace crucibe of heat conduction with novel to solve the problem of the performance of the plain ramming mass layer restriction hearth heat conductivility of present blast furnace crucibe charcoal. It is followed the hearth inboard and is pottery porcelain cup, bold micropore brick fuel layer, the high heat conduction brick fuel layer of fritter and cooling wall in proper order to the outside, inside lining, and each inner liner coefficient of heat conductivity increases from inside to outside in proper order, and bold micropore brick fuel cross section is arch -shaped. The utility model discloses owing to follow hearth inboard to the outside, different partial furnace wall coefficient of heat conductivity increase in proper order, there is not the thermal resistance layer, the blast furnace crucibe heat transfer efficiency improves by a wide margin, hearth brick fuel hot side temperature reduces, be favorable to the shell at furnace wall hot side shape slag formation, in order to resist molten iron and slag erodeing and corroding the furnace wall, simultaneously because the inside temperature reduction of brick fuel, the thermal stress is corresponding to be reduced, can avoid the formation of annulus and the erosion of harmful metal again, thereby it is damaged effectively to slow down the erosion of hearth, the extension blast furnace crucibe is on active service the life -span.

Description

The blast furnace crucibe that a kind of heat conduction is good
Technical field
This utility model relates to the blast furnace crucibe that a kind of heat conduction is good.
Background technology
How to extend blast furnace service life, be the focus of ironmaking technology field common concern.The generation furnace life service life of blast furnace was extended to current 10~15 year by 5~8 years of the eighties in last century, and the generation life-span in furnace life of the advanced blast furnace of part can reach more than 20 years.Wherein, the standard whether evaluation blast furnace generation furnace life terminates is exactly whether cupola well burns, or hidden danger is burnt in existence, therefore improving blast furnace crucibe military service performance is the important step extending the life of the blast furnace.
From the point of view of the practice of blast furnace ironmaking, the erosion breakage of basque is mainly caused by following many aspects factor: (1) molten iron seepage failure;(2) molten iron circulation washes away;(3) harmful element erosion to cupola well brick fuel;(4) cupola well thermal stress is excessive causes brick fuel ring fracture.Wherein (1), (2) depend on that the performance of cupola well brick fuel is fine or not, and the height of basque temperature is depended in (3), (4).For above-mentioned influence factor, improve blast furnace crucibe and need to set about in terms of material and two, structure, wherein for material, need to improve the anti-slag ferrum corrode performance of brick fuel, the heat conductivility, < index such as 1 μm micro-pore volume rate, alkali resistant metal attack performance;For structure, then needing to continue to optimize blast furnace crucibe structure, improve cupola well heat transfer efficiency to greatest extent, thus reduce the thermal stress within basque hot-face temperature and brick fuel, the erosion alleviating basque is damaged.
In recent years, along with the exploitation of high-quality brick fuel is applied, basque material capability is continued to optimize, and the performance of brick fuel body effectively improves, and can meet the use requirement of longevity type blast furnace., from the point of view of hearth structure, to outside inside cupola well, generally ceramic cup+brick fuel+carbon ramming mass+cooling wall+furnace shell structure;nullIn terms of the capacity of heat transmission,Still Shortcomings,Although bulk microporous carbon brick heat conductivity is typically at more than 20w/ (m k),Cooling wall heat conductivity is different according to unlike material,Copper cooling wall heat conductivity > 300w/ (m k),Ductile iron cooling stave heat conductivity > 30w/ (m k),But,It is only 5~10w/ (m k) at the carbon ramming mass heat conductivity at furnace shell,In the most original hearth structure,During heat is derived from the inside to the outside,There is this heat conduction bottleneck of carbon ramming mass,Especially not good enough when construction quality,Carbon ramming mass does not consolidates,Smash the bed of material when there is space,Heat conductivity is lower,Sometimes less than 5w/ (m k),Can seriously restrict the performance of cupola well heat conductivility,Brick fuel temperature anomaly inside cupola well is caused to raise,The erosion accelerating basque is damaged.For above-mentioned deficiency, it is necessary to existing hearth structure improves optimization, improving cupola well heat transfer efficiency, the erosion alleviating cupola well is damaged, extends blast furnace service life.
Summary of the invention
The purpose of this utility model is to overcome prior art defect, it is provided that the blast furnace crucibe that a kind of heat conduction is good, extends blast furnace crucibe service life.
The technical solution of the utility model is achieved in that the blast furnace crucibe that a kind of heat conduction is good, and it is, to outside inside cupola well, liner is followed successively by ceramic cup, bulk Microporous Carbon brick layer, fritter height heat-conductive carbon brick layer and cooling wall.
Preferably, bulk microporous carbon brick cross section is dome-shaped.
Preferably, ceramic cup, bulk Microporous Carbon brick layer, fritter height heat-conductive carbon brick layer and cooling wall each inner liner heat conductivity increase the most successively.
This utility model fritter height heat conductivity carbon brick instead of in original blast furnace crucibe structure the carbon ramming mass of low thermal conductivity between furnace shell and brick fuel, eliminates the thermoresistance layer in heat transfer system, therefore heat-conducting effect is greatly improved.Bulk brick fuel is changed into dome-shaped by original cuboid, therefore can fit tightly between bulk brick fuel and fritter brick fuel, it is not necessary to fills the carbon ramming mass of low thermal conductivity, again avoiding the existence of thermoresistance layer.Due to inside cupola well to outside; the heat conductivity of each several part liner raises successively; be conducive to the quick derivation of heat; can effectively reduce the hot-face temperature of cupola well brick fuel; furnace lining surface temperature is made to remain at below slag adiabatic condensation temperature; make liquid slag ferrum form one layer of protection skull on furnace lining surface, wash away erosion with resist molten iron and slag.Meanwhile, owing to cupola well heat conductivility is good, the thermograde within cupola well bulk brick fuel will also decrease, and brick fuel built-in thermal stress reduces accordingly, can be prevented effectively from the formation of brick fuel annulus and the poisonous metal deposition in annulus and erosion.Below cupola well service life can all be extended.
Accompanying drawing explanation
Fig. 1 is existing hearth structure front view.
Fig. 2 is existing hearth structure top view.
Fig. 3 is this utility model structural front view.
Fig. 4 is this utility model structure top view.
In figure, 1-furnace shell;2-cooling wall;3-carbon ramming mass layer;4-bulk Microporous Carbon brick layer;5-ceramic cup;6-fritter height heat-conductive carbon brick layer.
Detailed description of the invention
It is further described below in conjunction with the accompanying drawings:
As shown in Figure 1 and Figure 2, existing hearth structure inside cupola well to outside, it is followed successively by ceramic cup 5, bulk Microporous Carbon brick layer 4, carbon ramming mass layer 3, cooling wall 2 and furnace shell 1, during heat is derived from the inside to the outside, there is this thermoresistance layer heat conduction bottleneck of carbon ramming mass layer 3, the serious performance restricting cupola well heat conductivility, causes brick fuel temperature anomaly inside cupola well to raise, and the erosion accelerating basque is damaged.
As shown in Figure 3 and Figure 4, this utility model hearth structure inside cupola well to outside, it is followed successively by ceramic cup 5, bulk Microporous Carbon brick layer 4, fritter height heat-conductive carbon brick layer 6, cooling wall 2 and furnace shell 1, ceramic cup 5, bulk Microporous Carbon brick layer 4, fritter height heat-conductive carbon brick layer 6 and cooling wall 2 each inner liner heat conductivity increase the most successively, and bulk microporous carbon brick cross section is dome-shaped.
During construction, at the internally installed copper cooling wall of furnace shell 2, copper cooling wall heat conductivity is typically at 300w/ (m k), then some floor height heat conduction fritter brick fuels are built by laying bricks or stones being close at copper cooling wall 2, form fritter height heat-conductive carbon brick layer 6, fritter brick fuel heat conductivity is typically at more than 50w/ (m k), and fritter brick fuel is 200mm~300mm along cupola well radially gross thickness, and the concrete size of fritter brick fuel can be according to different stove type parameter flexible design;At fritter height heat-conductive carbon brick layer 6 hot side, build bulk Microporous Carbon brick layer 4 by laying bricks or stones, bulk brick fuel heat conductivity is typically at more than 20w/ (m k), owing to bulk brick fuel cross section is dome-shaped, therefore can build by laying bricks or stones along the laminating of fritter brick fuel hot side, the concrete size of bulk brick fuel can require to be set according to cupola well diameter and the different type of furnace.The present embodiment copper cooling wall 2 heat conductivity 300w/ (m k), copper cooling wall thickness is 120mm;Fritter brick fuel heat conductivity 50w/ (m k), fritter height heat-conductive carbon brick layer 6 is 300mm along cupola well radially gross thickness, and fritter brick fuel length × width × height a size of 300mm × 100mm × 80mm builds by laying bricks or stones with copper cooling wall laminating along its length;Bulk brick fuel heat conductivity is 20w/ (m k), and bulk brick fuel is 600mm along cupola well radially gross thickness, bulk brick fuel length × width × height a size of 600mm × 300mm × 300mm, builds by laying bricks or stones with the laminating of fritter brick fuel along its length.
This utility model due to inside cupola well to outside, different piece furnace lining heat conductivity increases successively, there is not thermoresistance layer, blast furnace crucibe heat transfer efficiency is greatly improved, cupola well brick fuel hot-face temperature reduces, be conducive to forming skull at furnace lining hot side, furnace lining is washed away and corrodes resisting molten iron and slag, simultaneously because brick fuel internal temperature reduces, thermal stress reduces accordingly, it is avoided that again the formation of annulus and the erosion of poisonous metal, thus the erosion effectively slowing down cupola well is damaged, extends blast furnace crucibe service life.

Claims (2)

1. the blast furnace crucibe that a heat conduction is good, it is characterised in that: to outside inside cupola well, liner is followed successively by ceramic cup, bulk Microporous Carbon brick layer, fritter height heat-conductive carbon brick layer and cooling wall, and bulk microporous carbon brick cross section is dome-shaped.
The blast furnace crucibe that a kind of heat conduction the most according to claim 1 is good, it is characterised in that: ceramic cup, bulk Microporous Carbon brick layer, fritter height heat-conductive carbon brick layer and cooling wall each inner liner heat conductivity increase the most successively.
CN201520904524.3U 2015-11-13 2015-11-13 Good blast furnace crucibe of heat conduction Active CN205576184U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520904524.3U CN205576184U (en) 2015-11-13 2015-11-13 Good blast furnace crucibe of heat conduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520904524.3U CN205576184U (en) 2015-11-13 2015-11-13 Good blast furnace crucibe of heat conduction

Publications (1)

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CN205576184U true CN205576184U (en) 2016-09-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109055639A (en) * 2018-10-12 2018-12-21 武汉钢铁有限公司 High thermal conductivity Long-life blast furnace hearth and bricking building method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109055639A (en) * 2018-10-12 2018-12-21 武汉钢铁有限公司 High thermal conductivity Long-life blast furnace hearth and bricking building method
CN109055639B (en) * 2018-10-12 2020-05-05 武汉钢铁有限公司 High-heat-conduction long-life blast furnace hearth and brick lining building method

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C14 Grant of patent or utility model
GR01 Patent grant
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Effective date of registration: 20170720

Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan

Patentee after: Wuhan iron and Steel Company Limited

Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang

Patentee before: Wuhan Iron & Steel (Group) Corp.