CN1072728C - Free cooling equipment suitable for use on blast furnace body - Google Patents
Free cooling equipment suitable for use on blast furnace body Download PDFInfo
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- CN1072728C CN1072728C CN99124941A CN99124941A CN1072728C CN 1072728 C CN1072728 C CN 1072728C CN 99124941 A CN99124941 A CN 99124941A CN 99124941 A CN99124941 A CN 99124941A CN 1072728 C CN1072728 C CN 1072728C
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- weight percent
- wedding agent
- blast furnace
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Abstract
The present invention relates to an integral body cooling device applied to a furnace body of a blast furnace, which comprises a base body of the integral body cooling device and steel pipes arranged in the base body, wherein the base body of the integral body cooling device is made from base materials made from corundum (Al2O3), silicon carbide (SiC) and silicon (Si) powder, and bonding agents made from calcium lignosulfonate and aluminium dihydrogen phosphate. The non-metal integral body cooling device of the present invention is produced by the adoption of the proportion so that the present invention has the advantages of high temperature resistance, enhanced abrasion resistance, volume stability, low thermal conductivity and good economical benefits and social benefits, and the safe working temperature of the heating surfaces of the integral body cooling device can reach 1400 DEG C.
Description
The present invention relates to a kind of cooling apparatus, relate to a kind of monomer cooling apparatus that is applicable to blast furnace specifically.
Blast furnace is a main equipment of producing molten iron in the Steel Complex.Blast-furnace body is made up of furnace foundation, framework, furnace shell, monomer cooling apparatus and furnace lining five parts.Wherein, depend on that can the monomer cooling apparatus works better work-ing life of blast furnace basically.(in " smelt iron academic nd Annual Meeting collection " 1998 years, the 206th page-209 pages, publisher: Liaoning Province's Metallkunde can be smelted iron academic board), therefore, the monomer cooling apparatus played crucial effects in the blast-furnace body structure.
The longevity of blast furnace is not only the needs that keep the production stable equilibrium in the Steel Complex, also is to reduce pig iron cost, improves the needs of competitive power on market.Therefore, blast furnace longevity is one of problem of being concerned about most of countries in the world ironmaking circle, also is the problem of China's metallurgical industry " 95 " research of technique.At present, though the long-lived technology of blast furnace has been made significant headway, body of heater (bosh is to the restoration of lower stack) life-span, short common fault still existed.The monomer cooling apparatus adopts the blast furnace of concentrated type structure, will change after the breakage of monomer cooling apparatus, and China's great majority adopt the large and medium-sized blast furnaces of monomer cooling apparatus, during average 4-5 carries out, overhaul once.And in blast-furnace smelting, the blast furnace former, that fuel condition is relatively poor (Anshan iron and steel plant, this steel, Taiyuan Iron and Steel Co. etc.) generally just begins breakage at 1 year left and right sides of blow-on monomer cooling apparatus, in blast furnace, leak in a large number after the cooling apparatus breakage, the coke ratio (the coke quantity that 1 ton of iron of every smelting needs) of blast-furnace smelting is raise, large and medium-sized blast furnace after a large amount of breakages of monomer cooling apparatus, the coke ratio 10-25kg/t. iron that on average raises.Meanwhile, the water that leaks in stove of monomer cooling apparatus at high temperature also can damage the carbon refractory in the blast furnace lining.Damaged monomer cooling apparatus is found Guan Shuihou, and furnace shell loses cooling protection, deforms then, ftractures, and is forced to carry out big or middle repairing.
At present, the monomer cooling apparatus used of blast furnace mainly contains two kinds: ductile iron cooling stave and copper cooling plate.There are Anshan iron and steel plant, Shoudu Iron and Steel Co, Wuhan Iron and Steel Plant, Baosteel, Wuxi heat-resistant cast factory etc. in manufacturer.After blow-on half a year; bosh is after the bricking of restoration of lower stack is etched; the monomer cooling apparatus loses the bricking protection, directly contacts with the coal gas stream and the furnace charge of high temperature (800 ℃～1200 ℃); under thermal stresses and action of high temperature; cause ductile iron cooling stave body crackle, the Cooling Pipe Crack and the damage of ablating.In addition, safe working temperature≤450 of metal monomer cooling apparatus hot side ℃, the top temperature that can bear is 770 ℃ (phase point temperatures of spheroidal graphite cast iron).But to restoration of lower stack, working temperature is about 1200 ℃-800 ℃ during ordinary production at blast-furnace bosh, and temperature higher (〉=1300 ℃) when the working of a furnace is undesired is so the breakage of monomer cooling apparatus is unavoidable.For this reason, active research is used copper cooling wall both at home and abroad, to reach the work-ing life that prolongs the monomer cooling apparatus.Copper cooling wall and copper cooling plate are because of cost too high (7.0 ten thousand yuan/ton), most of iron and steel enterprises are all unable bears, and the safe working temperature of ductile iron cooling stave and copper cooling plate must be lower than 770 ℃ of (the 7th page of the 34th the 4th phase of volume of " iron and steel " magazine of publishing in April, 1999) these difficult points and do not make a breakthrough all the time.
Purpose of the present invention provides a kind of monomer cooling apparatus that is applicable to blast furnace with regard to being to overcome above-mentioned existing in prior technology deficiency, it has not only reduced the cost of monomer cooling apparatus, and make safe working temperature 〉=1200 ℃ of monomer cooling apparatus, reach not damaged more than 10 years work-ing life, thereby guarantee the long-lived target that blast furnace was repaiied in not more than 10 years.
Purpose of the present invention can realize by following measure:
The present invention includes monomer cooling apparatus matrix and place its interior steel pipe, described monomer cooling apparatus matrix is by corundum (AL
2O
3), the base-material formed of silicon carbide (SiC), silicon (Si) powder and form by the wedding agent that wooden calcium sulfonate, aluminium dihydrogen phosphate are formed;
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 50%-95%;
Corundum (AL
2O
3) 0%-50%;
Silicon (Si) powder 5%-10%, the 180-500 order;
B: described wedding agent is formed by following weight percent:
The 10-100% of wooden calcium sulfonate;
Aluminium dihydrogen phosphate 0-90%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 93-97%;
Wedding agent 3-7%.
The present invention can be chosen as:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 51%;
Corundum (AL
2O
3) 40%;
Silicon (Si) powder 9%, 180 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 10%;
Aluminium dihydrogen phosphate 90%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 93%;
Wedding agent 7%.
The present invention is preferably:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 65%;
Corundum (AL
2O
3) 12%;
Silicon (Si) powder 23%, 250 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 55%;
Aluminium dihydrogen phosphate 45%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 95%;
Wedding agent 5%.
Optimal selection of the present invention is:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 83%;
Corundum (AL
2O
3) 11%
Silicon (Si) powder 6%, 500 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 100%;
Aluminium dihydrogen phosphate 0%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 97%;
Wedding agent 3%.
The present invention also may be selected to be:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 95%;
Corundum (AL
2O
3) 0%;
Silicon (Si) powder 5%, 350 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 80%;
Aluminium dihydrogen phosphate 20%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 96%;
Wedding agent 4%.
As improvement of the present invention, described steel pipe is the U-shaped structure, is provided with the heat absorption wing at outer surface of steel tube, and is provided with a high-temperaure coating at outer surface of steel tube.
Because the present invention adopts by corundum (AL
2O
3), the base-material formed of silicon carbide (SiC), silicon (Si) powder, form nonmetal monomer cooling apparatus body material with the wedding agent of forming by wooden calcium sulfonate, aluminium dihydrogen phosphate according to said ratio, thereby make the present invention have the following advantages: (1) resistance to elevated temperatures
Through test, the loading of body material gently changes a little 〉=and 1600 ℃, the hot side safe working temperature can reach 1400 ℃, under water flowing refrigerative condition, its hot side working temperature can reach 1500 ℃ can not ablate yet, and is higher than the working temperature of interior 1000 ℃～1200 ℃ of stove far away.Thereby can guarantee to reach work-ing life more than 10 years.(2) wear resistance
Because base-material belongs to abrasive material, wear resistance is higher than metal far away.Under water flowing refrigerative condition, can withstand the erosive wear of coal gas of high temperature stream and furnace charge, therefore can increase the service life.(3) volume stability
Its rate of expanding with heat and contract with cold is much smaller than spheroidal graphite cast iron and cast copper, the coefficient of expansion of spheroidal graphite cast iron is 15.85 * 10-6% in the time of 700 ℃, silicon carbide is 3.5 * 10-6%, thereby very little to being fixed on the suffered shearing force of water-cooled tube on (welding) furnace shell (thermal expansion produces), water cooling tube can not cause damage.This performance is far superior to metal cools equipment.(4) to peel off rate the same with spheroidal graphite cast iron in heat resistanceheat resistant, all is 50 ℃/minute.(5) thermal conductivity
Thermal conductivity under 700 ℃ condition, the same substantially with spheroidal graphite cast iron (21～22W/m.k), but far below cast copper.But because of body material high temperature resistant 〉=1400 ℃, thereby thermal conductivity lower slightly to there not being influence work-ing life yet.In addition, thermal conductivity is hanged down the heat lost by radiation in the time of can reducing blast-furnace smelting, has improved the heat energy utilization rate.(6) economic benefit and social benefit
According to metallurgical office of country statistic data in 1996, China now 〉=20 in 2000M3 blast furnace, 28 in the blast furnace of 1000～1999M3,30 in the blast furnace of 500～999M3,265 in the blast furnace of 100～499M3 (now still at about about 250 that produce) adds up to the about 149765M3 of heat size.After blast furnace adopted nonmetal monomer cooling apparatus, converter life reached more than 10 years, even 10-15 repaiies in not, and its economic benefit and social benefit are appreciable.Blast furnace with a 1000M3 is an example, reduces big or middle repairing and can save 308.5 ten thousand yuan/year, 106.5 ten thousand yuan/year of the financial losses that reducing stops production brings.Produce stable after the blast furnace longevity, the productive capacity that reduces the stove labour later stage (coke ratio raises after the breakage of monomer cooling apparatus) descends, and pig iron coke ratio reduction per ton is pressed 5kg/t and calculated, and saves 990,000 yuan/year, save 2.4 ten thousand yuan/year of the blow-on expenses of medium-capital overhauling in addition, more than save 5,160,000 yuan/year altogether.
Press the average rough calculation of heat size, then be: 0.516 ten thousand yuan/(year .M3).Can save the whole year:
0.516 ten thousand yuan/year of ten thousand yuan/(year .M3) * 149765M3=77278.74; Can also save simultaneously number in ten thousand tons metal.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a front view of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
Fig. 3 is the three-dimensional view of matrix of the present invention.
Fig. 4 is the steel-making blast furnace topology view.
The present invention is described in further detail below in conjunction with specific embodiment (accompanying drawing):
Embodiment 1:
The 1st step: with corundum (AL
2O
3), silicon carbide (SiC), silicon (Si) powder is even according to the following weight percentage mix:
Silicon carbide (SiC) 51%;
Corundum (AL
2O
3) 40%;
Silicon (Si) powder 9%, granularity 180 orders;
The 2nd step: wooden calcium sulfonate, aluminium dihydrogen phosphate are mixed by following weight percent:
Wooden calcium sulfonate 10%;
Aluminium dihydrogen phosphate 90%.
The 3rd step: base-material and wedding agent are added the water uniform mixing by following weight percent:
Base-material 93%;
Wedding agent 7%.
The 4th step: the mixture of base-material and wedding agent is put into mould make as shown in Figure 3 base shape, after the moulding of vibration pressure forming machine, drying is inserted the 1420-1500 ℃ of nitriding treatment in nitriding furnace inherence.
The 5th step: U-shaped steel pipe 3 is placed in the groove 2 of matrix 1, tamp oven dry with base-material then and fix.
Embodiment 2:
The 1st step: with corundum (AL
2O
3), silicon carbide (SiC), silicon (Si) powder is even according to the following weight percentage mix:
Silicon carbide (SiC) 65%;
Corundum (AL
2O
3) 23%;
Silicon (Si) powder 12%, granularity 250 orders;
The 2nd step: wooden calcium sulfonate, aluminium dihydrogen phosphate are mixed by following weight percent:
Wooden calcium sulfonate 55%;
Aluminium dihydrogen phosphate 45%.
The 3rd step: base-material and wedding agent are added the water uniform mixing by following weight percent:
Base-material 95%;
Wedding agent 5%.
The 4th step: the mixture of base-material and wedding agent is put into mould make as shown in Figure 3 base shape, after the moulding of vibration pressure forming machine, drying is inserted the 1420-1500 ℃ of nitriding treatment in nitriding furnace inherence.
The 5th step: U-shaped steel pipe 3 is placed in the groove 2 of matrix 1, tamp oven dry with base-material then and fix.
Embodiment 3:
The 1st step: with corundum (AL
2O
3), silicon carbide (SiC), silicon (Si) powder is even according to the following weight percentage mix:
Silicon carbide (SiC) 83%;
Corundum (AL
2O
3) 11%;
Silicon (Si) powder 6%, granularity 500 orders;
The 2nd step: wooden calcium sulfonate, aluminium dihydrogen phosphate are mixed by following weight percent:
Wooden calcium sulfonate 100%;
Aluminium dihydrogen phosphate 0%.
The 3rd step: base-material and wedding agent are added the water uniform mixing by following weight percent:
Base-material 97%;
Wedding agent 3%.
The 4th step: the mixture of base-material and wedding agent is put into mould make as shown in Figure 3 base shape, after the moulding of vibration pressure forming machine, drying is inserted the 1420-1500 ℃ of nitriding treatment in nitriding furnace inherence.
The 5th step: U-shaped steel pipe 3 is placed in the groove 2 of matrix 1, tamp oven dry with base-material then and fix.
Embodiment 4:
The 1st step: with corundum (AL
2O
3), silicon carbide (SiC), silicon (Si) powder is even according to the following weight percentage mix:
Silicon carbide (SiC) 95%;
Corundum (AL
2O
3) 0%;
Silicon (Si) powder 5%, granularity 350 orders;
The 2nd step: wooden calcium sulfonate, aluminium dihydrogen phosphate are mixed by following weight percent:
Wooden calcium sulfonate 80%;
Aluminium dihydrogen phosphate 20%.
The 3rd step: base-material and wedding agent are added the water uniform mixing by following weight percent:
Base-material 96%;
Wedding agent 4%.
The 4th step: the mixture of base-material and wedding agent is put into mould make as shown in Figure 3 base shape, after the moulding of vibration pressure forming machine, drying is inserted the 1420-1500 ℃ of nitriding treatment in nitriding furnace inherence.
The 5th step: U-shaped steel pipe 3 is placed in the groove 2 of matrix 1, tamp oven dry with base-material then and fix.
Claims (8)
1, a kind of monomer cooling apparatus that is applicable to blast furnace, it comprises monomer cooling apparatus matrix (1) and places its interior steel pipe (3) that it is characterized in that: described monomer cooling apparatus matrix (1) is by corundum (AL
2O
3), the base-material formed of silicon carbide (SiC), silicon (Si) powder and the wedding agent group of forming by wooden calcium sulfonate, aluminium dihydrogen phosphate and form;
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 50%-95%;
Corundum (AL
2O
3) 0%-50%;
Silicon (Si) powder 5%-10%, the 180-500 order;
B: described wedding agent is formed by following weight percent:
The 10-100% of wooden calcium sulfonate;
Aluminium dihydrogen phosphate 0-90%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 93-97%;
Wedding agent 3-7%.
2, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 51%;
Corundum (AL
2O
3) 40%;
Silicon (Si) powder 9%, 180 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 10%;
Aluminium dihydrogen phosphate 90%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 93%;
Wedding agent 7%.
3, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 65%;
Corundum (AL
2O
3) 23%;
Silicon (Si) powder 12%, 250 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 55%;
Aluminium dihydrogen phosphate 45%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 95%;
Wedding agent 5%.
4, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 83%;
Corundum (AL
2O
3) 11%;
Silicon (Si) powder 6%, 500 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 100%;
Aluminium dihydrogen phosphate 0%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 97%;
Wedding agent 3%.
5, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that:
A: described base-material is formed by following weight percent:
Silicon carbide (SiC) 95%;
Corundum (AL
2O
3) 0%;
Silicon (Si) powder 5%, 350 order;
B: described wedding agent is formed by following weight percent:
Wooden calcium sulfonate 80%;
Aluminium dihydrogen phosphate 20%;
C: base-material and wedding agent are formed by following weight percent:
Base-material 96%;
Wedding agent 4%.
6, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that: described steel pipe (3) is the U-shaped structure.
7, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that: be provided with heat absorption wing (4) at described steel pipe (3) outside surface.
8, the monomer cooling apparatus that is applicable to blast furnace according to claim 1 is characterized in that: be provided with a high-temperaure coating at described steel pipe (3) outside surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99124941A CN1072728C (en) | 1999-12-23 | 1999-12-23 | Free cooling equipment suitable for use on blast furnace body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99124941A CN1072728C (en) | 1999-12-23 | 1999-12-23 | Free cooling equipment suitable for use on blast furnace body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1259579A CN1259579A (en) | 2000-07-12 |
| CN1072728C true CN1072728C (en) | 2001-10-10 |
Family
ID=5283656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99124941A Expired - Fee Related CN1072728C (en) | 1999-12-23 | 1999-12-23 | Free cooling equipment suitable for use on blast furnace body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1072728C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107271B (en) * | 2010-12-31 | 2013-01-16 | 烟台万隆真空冶金有限公司 | Endogenous-steam cooling casting method for castings |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531106A (en) * | 1976-06-25 | 1978-01-07 | Nippon Steel Corp | Construction of cooling stave of furnace |
| US4217954A (en) * | 1978-02-03 | 1980-08-19 | Gutehoffnungshutte Sterkrade Aktiengesellschaft | Cooling plate for a furnace in a metallurgical plant |
| CN87214698U (en) * | 1987-10-23 | 1988-10-05 | 武汉钢铁公司 | Pottery and porcelain combined cooling wall |
| JPH01272707A (en) * | 1988-04-22 | 1989-10-31 | Kawasaki Steel Corp | Stave for cooling furnace wall in blast furnace |
| CN2336307Y (en) * | 1998-09-25 | 1999-09-01 | 唐山市嘉恒实业有限公司 | Pouring lining for furnace |
-
1999
- 1999-12-23 CN CN99124941A patent/CN1072728C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531106A (en) * | 1976-06-25 | 1978-01-07 | Nippon Steel Corp | Construction of cooling stave of furnace |
| US4217954A (en) * | 1978-02-03 | 1980-08-19 | Gutehoffnungshutte Sterkrade Aktiengesellschaft | Cooling plate for a furnace in a metallurgical plant |
| CN87214698U (en) * | 1987-10-23 | 1988-10-05 | 武汉钢铁公司 | Pottery and porcelain combined cooling wall |
| JPH01272707A (en) * | 1988-04-22 | 1989-10-31 | Kawasaki Steel Corp | Stave for cooling furnace wall in blast furnace |
| CN2336307Y (en) * | 1998-09-25 | 1999-09-01 | 唐山市嘉恒实业有限公司 | Pouring lining for furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1259579A (en) | 2000-07-12 |
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