CN1280231C - Lining material composition of mains frequency core induction melt furnace - Google Patents
Lining material composition of mains frequency core induction melt furnace Download PDFInfo
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- CN1280231C CN1280231C CN 200410026369 CN200410026369A CN1280231C CN 1280231 C CN1280231 C CN 1280231C CN 200410026369 CN200410026369 CN 200410026369 CN 200410026369 A CN200410026369 A CN 200410026369A CN 1280231 C CN1280231 C CN 1280231C
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Abstract
The present invention relates to lining material composition of a mains frequency core induction melt furnace, which comprises a 73% to 80% of electric melting compact corundum, 3% to 5% of electric melting zirconium mullite, 4% to 6% of silicon carbide, 7% to 8% of calcium aluminate cement and 6% to 10% of aluminum oxide micro powder. The present invention has long service life. The present invention uses the electric melting compact corundum as the main material, and the silicon carbide is added so as to enhance the capability of a furnace lining of resisting the erosion and the penetration of iron liquid and slag. The mullite is added to obviously raise toughness and heat vibration resistance except raising the performance of erosion resistance; the use of the aluminum oxide micro powder improves the flowability of a pouring material as well as raises the high temperature performance of the material, and the calcium aluminate cement is used as a binding agent. When the present invention is used for a nodular cast iron melting heat-insulating furnace, the service life can achieve 8 to 10 months, and the iron flowing quantity achieves 45000 to 50000 tons; when the present invention is used for a gray iron melting heat-insulating furnace, the service life can achieve more than 12 months, the iron flowing quantity achieves 50000 to 60000 tons, and the selling price is less than two thirds of that of the imported material. The present invention is widely used for metallurgy industry, casting industry, etc. Besides, the present invention has the advantage of favorable society and economic benefit.
Description
Technical field
The present invention relates to refractory materials, the power frequency cored induction melting furnace lining material of particularly suitable composition.
Background technology
It is the large-scale key equipment of casting industry that core power frequency cast iron induction furnace is arranged, and along with the increase and the foundry goods miniaturization of spheroidal graphite cast iron amount, the tapping temperature of stove is more and more high, and home made materials can not adapt to requirement.Successively there is the product of Sweden Hong Gedasi company, U.S. associating mineral products company to enter China.But the performance of imported materials and items still can not meet the demands, exist furnace lining damage phenomenon serious, especially furnace lining deteriorates and peels off, only 4～5 months work-ing life, crossing the iron quantity not sufficient just needs to repair furnace lining for 30,000 tons, and need stop production to overhaul this moment, brings the significant wastage of human and material resources to ordinary production, strengthen the cost of product simultaneously, reduced defectives such as product amount.
Summary of the invention
It is low that goal of the invention of the present invention provides a kind of cost, and material property is stable, and making method is easy, long service life, the power frequency cored induction melting furnace lining material composition of furnace lining material erosion resistance and raising heat-shock resistance.
Realize that the goal of the invention technical scheme is to solve like this: power frequency cored induction furnace furnace lining castable composition, its outstanding progress is by mass ratio: by electric smelting compact alumina 73～80%, fused zirconia-mullite 3～5%, silicon carbide 4～6%, aluminous cement 5～8%, aluminium oxide powder 6～9% is formed.The quality-class proportioning of said furnace lining castable composition is: wherein the compact alumina of compact alumina 5～8mm granularity should account for 10～12% of total mass ratio; The compact alumina of 3～5mm granularity should account for 10～11% of total mass ratio; 1～3mm granularity compact alumina should account for 18～20% of total mass ratio; 0～1mm granularity compact alumina should account for 23～25% of total mass ratio;＜0.074mm granularity compact alumina should account for 9～11% of total mass ratio.Fused zirconia-mullite＜0.088mm granularity is 3～5%, and silicon carbide 120# granularity is 4～6%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 5～8%, aluminium oxide powder D
50≤ 5 μ m granularities are 6～9%.Aluminium oxide powder is that a kind of size-grade distribution is bimodal ultrafine powder.
The present invention compared with prior art, cost is low, material property is stable, making method is easy, long service life is main material with the electric smelting compact alumina, has improved the overall performance of material; Add silicon carbide and improved the ability of furnace lining material opposing iron liquid and slag corrosion and infiltration; Add and contain the fused zirconia-mullite raw material except that the erosion-resisting characteristics that has improved material, especially toughness and the resistance to heat shocks to material improves significantly; Both improved the flowability of mould material with aluminium oxide powder, also improved the high-temperature behavior of material, made wedding agent with aluminous cement.Adopt the furnace lining of furnace lining material composition cast of the present invention, can reach 8～10 months work-ing life on spheroidal graphite cast iron melting and heat preservation stove, and iron influx is 4.5～5.0 ten thousand tons; Can reach more than 12 months work-ing life on gray iron melting and heat preservation stove, and iron influx reaches 5～60,000 tons, price then not enough imported materials and items 2/3, be widely used in industries such as metallurgy, casting, simultaneously can organize foreign exchange earning, have good society and economic benefit.
Embodiment
Below in conjunction with embodiment content of the present invention is described further
Power frequency cored induction furnace furnace lining castable composition, by electric smelting compact alumina 73～80%, fused zirconia-mullite 3～5%, silicon carbide 4～6%, aluminous cement 7～8%, aluminium oxide powder 6～12% is formed; The quality-class proportioning of said furnace lining castable composition is: wherein the quality-class proportioning of compact alumina is: the compact alumina of 5～8mm granularity should account for 10～20% of total mass ratio; The compact alumina of 3～5mm granularity should account for 10～16% of total mass ratio; 1～3mm granularity compact alumina should account for 18～30% of total mass ratio; 0～1mm granularity compact alumina should account for 23～30% of total mass ratio;＜0.074mm granularity compact alumina should account for 9～15% of total mass ratio, and fused zirconia-mullite＜0.088mm granularity is 3～6%, and silicon carbide 120# granularity is 3～5%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 6～10%, aluminium oxide powder D
50≤ 5 μ m granularities are 6～12%.
Silicon carbide is a kind of green silicon carbide.Aluminium oxide powder is that a kind of size-grade distribution is bimodal ultrafine powder.
Require as follows to raw-material chemical ingredients:
The title material index
Electric smelting compact alumina Al
2O
3〉=98～99%
Fused zirconia-mullite Al
2O
340～46%, ZrO
234～36%
Green SiC SiC 98～99%
Aluminous cement Al
2O
369～71%, CaO 29～31%
A-Al
2O
3Micro mist Al
2O
398～99%
Size range
Material particle size scope: 0～8mm, wherein the particle diameter of compact alumina is 0.044～8.00mm, and the fused zirconia-mullite particle diameter is＜0.088mm, and green silicon carbide is 80～120#, and alumina powder is D
50≤ 5 μ m.
Material tap density Andreassen distribution equation CEFT/100=(D/D
L)
qCalculate, the q value gets 0.23 or 0.25, to reach the maximum tap density of vibration.
Embodiment 1
Electric smelting compact alumina 73%, fused zirconia-mullite 4%, silicon carbide 5%, aluminous cement 9%, aluminium oxide powder 9%.The quality-class proportioning of said furnace lining castable composition is: the wherein fine and close compact alumina of 5mm granularity just should account for total mass ratio 10%, the compact alumina of 4mm granularity should account for total mass ratio 15%, 1mm granularity compact alumina should account for total mass ratio 30%, 0.5mm granularity compact alumina should account for total mass ratio 30%,＜0.074mm granularity compact alumina should account for 15% of total mass ratio, fused zirconia-mullite＜0.088mm granularity is 4%, silicon carbide 120# granularity is 5%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 9%, aluminium oxide powder D
50≤ 5 μ m granularities are 9%.
Embodiment 2
Electric smelting compact alumina 77%, fused zirconia-mullite 3%, silicon carbide 4%, aluminous cement 8%, aluminium oxide powder 8%.The quality-class proportioning of said furnace lining castable composition is: the wherein fine and close compact alumina of 6mm granularity just should account for total mass ratio 15%, the compact alumina of 4mm granularity should account for total mass ratio 12%, 2mm granularity compact alumina should account for total mass ratio 28%, 0.8mm granularity compact alumina should account for total mass ratio 25%,＜0.074mm granularity compact alumina should account for 20% of total mass ratio, fused zirconia-mullite＜0.088mm granularity is 3%, silicon carbide 120# granularity is 4%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 8%, aluminium oxide powder D
50≤ 5 μ m granularities are 8%.
Embodiment 3
Electric smelting compact alumina 79%, fused zirconia-mullite 3%, silicon carbide 4%, aluminous cement 7%, aluminium oxide powder 7%.The quality-class proportioning of said furnace lining castable composition is: wherein the compact alumina of compact alumina 7mm granularity should account for total mass ratio 18%, the compact alumina of 6mm granularity should account for total mass ratio 14%, 3mm granularity compact alumina should account for total mass ratio 25%, 1mm granularity compact alumina should account for total mass ratio 28%,＜0.074mm granularity compact alumina should account for 15% of total mass ratio, fused zirconia-mullite＜0.088mm granularity is 3%, silicon carbide 120# granularity is 4%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 7%, aluminium oxide powder D
50≤ 5 μ m granularities are 7%.
In sum, making method of the present invention is undertaken by following step:
A, pour in the forced mixer to do by the various raw materials of the accurate weighing of ratio requirement (except the cement) and mixed 5 minutes;
B, discharging are delivered to feed bin through belt, and feed bin is divided into wrapping machine, mould outer woven bag in packing into, and the 25Kg/ bag is Preblend;
Pour Preblend and aluminous cement into forced mixer in proportion when c, construction, do and mixed 3 minutes, added the water wet mixing 5 minutes, pour the furnace lining loose tool into, use immersion vibrator vibratory compaction;
D, the demoulding after 24 hours, natural curing 3 days is by coming into operation after the barbecue system barbecue.
Claims (6)
1, a kind of power frequency cored induction furnace furnace lining castable composition, it is characterized in that by mass ratio: by electric smelting compact alumina 73～80%, fused zirconia-mullite 3～5%, silicon carbide 4～6%, aluminous cement 5～8%, aluminium oxide powder 6～9% is formed; The particle size range of aluminium oxide powder is D
50≤ 5 μ m.
2, power frequency cored induction furnace furnace lining castable composition according to claim 1, it is characterized in that by mass ratio: by electric smelting compact alumina 75～77%, fused zirconia-mullite 3～4%, silicon carbide 4～5%, aluminous cement 7.5～8%, aluminium oxide powder 7～8% is formed; The particle size range of aluminium oxide powder is D
50≤ 5 μ m.
3, power frequency cored induction furnace furnace lining castable composition according to claim 1 is characterized in that said aluminium oxide powder is that a kind of size-grade distribution is bimodal ultrafine powder.
4, a kind of power frequency cored induction furnace furnace lining castable composition is characterized in that by mass ratio by electric smelting compact alumina 73%, fused zirconia-mullite 4%, and silicon carbide 5%, aluminous cement 9%, aluminium oxide powder 9% is formed; The quality-class proportioning of said furnace lining castable composition is: wherein the compact alumina of compact alumina 5mm granularity should account for total mass ratio 10%, the compact alumina of 4mm granularity should account for total mass ratio 15%, 1mm granularity compact alumina should account for total mass ratio 30%, 0.5mm granularity compact alumina should account for total mass ratio 30%,＜0.074mm granularity compact alumina should account for 15% of total mass ratio, fused zirconia-mullite＜0.088mm granularity is 4%, silicon carbide 120# granularity is 5%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 9%, aluminium oxide powder D
50≤ 5 μ m granularities are 9%.
5, a kind of power frequency cored induction furnace furnace lining castable composition is characterized in that by mass ratio by electric smelting compact alumina 77%, fused zirconia-mullite 3%, and silicon carbide 4%, aluminous cement 8%, aluminium oxide powder 8% is formed; The quality-class proportioning of said furnace lining castable composition is: wherein the compact alumina of compact alumina 6mm granularity should account for total mass ratio 15%, the compact alumina of 4mm granularity should account for total mass ratio 12%, 2mm granularity compact alumina should account for total mass ratio 28%, 0.8mm granularity compact alumina should account for total mass ratio 25%,＜0.074mm granularity compact alumina should account for 20% of total mass ratio, fused zirconia-mullite＜0.088mm granularity is 3%, silicon carbide 120# granularity is 4%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 8%, aluminium oxide powder D
50≤ 5 μ m granularities are 8%.
6, a kind of power frequency cored induction furnace furnace lining castable composition is characterized in that by mass ratio by electric smelting compact alumina 79%, fused zirconia-mullite 3%, and silicon carbide 4%, aluminous cement 7%, aluminium oxide powder 7% is formed; The quality-class proportioning of said furnace lining castable composition is: wherein the compact alumina of compact alumina 7mm granularity should account for total mass ratio 18%, the compact alumina of 6mm granularity should account for total mass ratio 14%, 3mm granularity compact alumina should account for total mass ratio 25%, 1mm granularity compact alumina should account for total mass ratio 28%,＜0.074mm granularity compact alumina should account for 15% of total mass ratio, fused zirconia-mullite＜0.088mm granularity is 3%, silicon carbide 120# granularity is 4%, and the aluminous cement granularity is Bo Shi method specific surface area 4012 (cm
2/ g) 7%, aluminium oxide powder D
50≤ 5 μ m granularities are 7%.
Priority Applications (1)
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|---|---|---|---|
| CN 200410026369 CN1280231C (en) | 2004-07-27 | 2004-07-27 | Lining material composition of mains frequency core induction melt furnace |
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|---|---|---|---|
| CN 200410026369 CN1280231C (en) | 2004-07-27 | 2004-07-27 | Lining material composition of mains frequency core induction melt furnace |
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| CN1597608A CN1597608A (en) | 2005-03-23 |
| CN1280231C true CN1280231C (en) | 2006-10-18 |
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Cited By (1)
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|---|---|---|---|---|
| CN102261845A (en) * | 2011-06-06 | 2011-11-30 | 浙江大学 | Heat insulation integral composite brick with corundum-mullite structure and preparation method |
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| CN100364931C (en) * | 2006-07-05 | 2008-01-30 | 鞍山浦项特种耐火材料有限公司 | Novel aluminum-zirconium-carbon slide brick for flow control in metallurgy industry |
| CN101172847B (en) * | 2007-09-30 | 2010-06-09 | 巩义市好运祥耐材有限公司 | Castable for preparing high-temperature ceramic wear-resistant lining body |
| CN101921122B (en) * | 2010-08-17 | 2013-01-16 | 河南省耕生高温材料有限公司 | Corundum furnace liner composite and preparation method thereof through isostatic pressing |
| CN101921124A (en) * | 2010-08-24 | 2010-12-22 | 西安秦翔科技有限责任公司 | Brasque castable composition for press pouring furnace |
| CN103896603B (en) * | 2012-12-28 | 2015-09-16 | 攀钢冶金材料有限责任公司 | A kind of refractory castable for Molten salt chlorination furnace and its preparation method and application |
| CN104140277A (en) * | 2014-07-31 | 2014-11-12 | 陕西宝光陶瓷科技有限公司 | Method for manufacturing integrated furnace lining for medium-frequency induction heating furnace |
| CN109627040A (en) * | 2019-02-27 | 2019-04-16 | 佛山石湾鹰牌陶瓷有限公司 | Lightweight thermal insulation brick |
| CN115650744B (en) * | 2022-11-03 | 2023-10-24 | 湖北品申科技有限公司 | Mullite ramming mass for copper smelting intermediate frequency furnace and preparation method thereof |
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2004
- 2004-07-27 CN CN 200410026369 patent/CN1280231C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261845A (en) * | 2011-06-06 | 2011-11-30 | 浙江大学 | Heat insulation integral composite brick with corundum-mullite structure and preparation method |
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| CN1597608A (en) | 2005-03-23 |
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