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Bottom material for steelmaking furnace and using method thereof

A technology for laying bottom materials and steelmaking furnaces, which is applied in the field of electric arc furnace steelmaking or induction furnace steelmaking, and steelmaking furnace bottom materials, to achieve the effects of shortening the time of slag change, eliminating the hazard of boron mud, and strong absorption of inclusions

Inactive Publication Date: 2016-04-06
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is: to invent a new steelmaking furnace bottom material, solve the existing problems of the existing bottom material, and at the same time, realize the reuse of waste boron mud resources

Method used

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  • Bottom material for steelmaking furnace and using method thereof

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Effect test

Embodiment 1

[0021] Ingredients (mass percentage): boron mud 20%, lithium carbonate 4%, potassium carbonate 6%, lime 50%, iron concentrate 15%, aluminum ash 5%.

[0022] For electric arc furnace steelmaking, boron mud, lithium carbonate and potassium carbonate, lime, iron concentrate and aluminum ash are all made into powder and mixed well, then add glucose aqueous solution with a concentration of 5wt%, the amount of glucose aqueous solution added is the mass of the bottom layer 2% of the fraction, and then mix water so that the water content (mass fraction) of the mixture is 8%. After pressing the ball, dry it at 300 degrees Celsius and then pack it in a moisture-proof package. It is used in the electric arc furnace steelmaking furnace, and the addition amount is 1% of the total weight of the metal material in the furnace.

Embodiment 2

[0024] Ingredients (mass percentage): boron mud 10%, lithium carbonate 4%, lime 70%, iron concentrate 15%, aluminum ash 1%.

[0025] For electric arc furnace steelmaking, boron mud, lithium carbonate, lime, iron concentrate and aluminum ash are all made into powder and mixed evenly, then add glucose with a concentration of 6wt%, and the amount of glucose aqueous solution added is 3% of the mass fraction of the primer , and then mix water so that the water content (mass fraction) of the mixture is 7%. After pressing the ball, dry it at 300 degrees Celsius and then pack it in a moisture-proof package. For use in steel furnaces, the amount added is 3% of the total weight of the metal material in the furnace.

Embodiment 3

[0027] Ingredients (mass percentage): boron mud 15%, lithium carbonate 2%, potassium carbonate 4%, sodium carbonate 2%, lime 55%, iron concentrate 17%, aluminum ash 5%.

[0028] It is used for 5 tons of electric arc furnace steelmaking as a base material. Boron mud, lithium carbonate and potassium carbonate, lime, iron concentrate and aluminum ash are all made into powder and mixed with 5wt% glucose. The addition of glucose solution is 2% of the mass fraction of the bottoming material, and then add water so that the water content (mass fraction) of the mixture is 7%, dry it at 300 degrees Celsius and then pack it in a moisture-proof package. 5% of the total weight of the metal charge into the furnace.

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Abstract

The invention relates to the technical field of iron and steel metallurgy, and in particular to a steelmaking furnace flooring material and a method for using the same. The steelmaking furnace flooring material of the invention is composed of boron mud, strong alkali carbonate, lime, iron concentrate and aluminum ash; For electric arc furnace steelmaking, it is necessary to make boron mud, strong alkali carbonate, lime, iron concentrate and aluminum ash into powder, sieve, add organic binder, press ball after water distribution, dry and pack in moisture-proof package for use It is used as the first batch of material in the furnace as the bottom material; for induction furnace steelmaking, it needs to be layered and spread to the bottom of the furnace in batches, and the order of the material is boron mud, aluminum ash, strong alkali carbonate, lime, iron concentrate . The bottom paving material of the present invention has the functions and advantages of protecting furnace bottom lining, rapid slag removal and early rapid dephosphorization, which is beneficial to improve the stability of early smelting, and the raw material source of the present invention is wide, the cost is low, the economic benefit is obvious, and it is worth popularizing .

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a bottom material for a steelmaking furnace and a method for using the same, which is suitable for electric arc furnace steelmaking or induction furnace steelmaking with scrap steel as the main metal material. 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 app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52
Inventor 王宏明李兵李桂荣赵钊
Owner JIANGSU UNIV
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