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A kind of induction furnace rapid repair charge and furnace repair method

A technology for repairing materials and induction furnaces, which is applied in the field of rapid repairing materials and furnace repairs for induction furnaces. It can solve the problems that induction furnaces cannot repair furnaces and shorten repair time, and achieve the elimination of boron mud hazards, shape stability and adhesion combination Strong performance, the effect of improving the service life of the furnace

Inactive Publication Date: 2015-12-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to invent a rapid repairing charge and repairing method for an induction furnace, solve the problem that the existing induction furnace cannot repair the furnace, shorten the repairing time, prolong the life of the furnace lining, save the cost of steelmaking, and at the same time, realize the waste of boron slime resource reuse

Method used

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  • A kind of induction furnace rapid repair charge and furnace repair method

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Effect test

Embodiment 1

[0024] Ingredients (mass percentage): 30% boron mud, 3% coke powder, 2% silicon carbide powder, 45% magnesia, 20% lime; hot repair furnace for 5 tons of medium frequency induction steelmaking furnace, the furnace lining is made of alumina The smelting steel is high chromium alloy steel, the tapping temperature is 1685°C, and the slagging materials are mainly lime, fluorite and iron oxide. 10 kilograms of rapid furnace repair materials of the present invention are carried out on-line thermal repair furnace, furnace repair materials are prepared by weighing boron mud 30%, coke powder 3%, silicon carbide powder 2%, magnesia 45%, lime 20%, but can not mix; The furnace process is: after the induction furnace smelts and taps steel, first add the first layer of repair materials in the furnace, including boron mud, coke powder and silicon carbide powder. The particle size of boron mud, coke powder and silicon carbide powder should be less than 1mm, and mix evenly Then add it into the ...

Embodiment 2

[0026] Ingredients (mass percentage): boron mud 20%, coke powder 5%, silicon carbide 5%, magnesia 45%, lime 25%;

[0027] The 15-ton medium-frequency induction steelmaking furnace is hot-repaired. The furnace lining is a neutral furnace lining made of alumina. The smelted steel is high-chromium alloy steel. The tapping temperature is 1685°C. The smelting slag-making materials are mainly lime, fluorite and iron oxide. etc. After tapping, there is obvious melting loss on the inner side of the furnace facing the tapping side, and a total of 30 kilograms of rapid repairing materials of the present invention are used for online hot repairing of the furnace. The repairing materials are as follows: boron mud 20%, coke powder 5%, silicon carbide 5% %, 45% magnesia, 25% lime and weigh and prepare materials, but they cannot be mixed. The repairing process is as follows: after the induction furnace smelts steel, first add the first layer of repairing materials in the furnace, including bo...

Embodiment 3

[0029] Ingredients (mass percentage): boron mud 30%, coke powder 4%, silicon carbide 6%, magnesia 40%, lime 20%;

[0030] The 45-ton medium-frequency induction steelmaking furnace is hot repaired. The furnace lining is a neutral furnace lining made of alumina. The smelted steel is tungsten-molybdenum alloy steel. The tapping temperature is 1680 ° C. The smelting slag-making materials are mainly lime, fluorite and iron oxide. etc. After tapping, there is obvious melting loss on the inner side of the furnace facing the tapping side, and a total of 90 kg of rapid repairing materials of the present invention are used for online hot repairing of the furnace. The repairing materials are as follows: boron mud 30%, coke powder 4%, silicon carbide 6 %, 40% magnesia, 20% lime and weigh and prepare materials, but they cannot be mixed. The repairing process is as follows: after the induction furnace smelts steel, first add the first layer of repairing materials in the furnace, including bo...

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Abstract

The invention relates to the technical field of induction furnace steelmaking, in particular to a rapid repairing charge and a repairing method for an induction furnace. The repair charge is composed of boron mud, coke powder, silicon carbide powder, magnesia and lime. Silicon powder is melted by waste heat, and then applied to the inner wall of the furnace through a shaking furnace where repairing is required, and then the second layer of repairing materials, including magnesia and lime, is sprayed with gas as carrier gas. The process is first Spray magnesia on the part of the furnace wall to be repaired, and finally spray a layer of lime on the inner side of the furnace wall by using gas as carrier gas to repair the furnace, and complete the furnace repair. The repairing charge of the present invention has the function of protecting the furnace lining and realizing rapid repairing of the furnace. At the same time, the repairing charge is harmless to slagging in the initial stage of smelting, and has the effect of increasing the basicity of the initial slag, which is beneficial to slagging and early rapid dephosphorization. The invention has wide sources of raw materials, low cost and obvious economic benefits, and is worth popularizing.

Description

technical field [0001] The invention relates to the technical field of induction furnace steelmaking, in particular to a rapid repairing charge and a repairing method for an induction furnace. Background technique [0002] my country is rich in boron ore resources. However, most boron ores in my country are of low grade and most of them are mixed type ores. Lean ore, the extraction cost is too high, the treatment process is complicated, and there is no re-extraction value. It has been treated as waste slag accumulation, which not only occupies a large amount of land resources, but also a large amount of boron mud open-air accumulation causes serious pollution to soil and water resources. Boron mud comprehensive Utilization problems urgently need to be resolved; from the perspective of the main composition of dehydrated boron mud powder, it has application value in the field of metallurgical charge and needs to be developed. [0003] In the field of induction furnace steelmaki...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 王宏明李桂荣赵钊李兵
Owner JIANGSU UNIV
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