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Grate-layer material of steel refining furnace, and application method thereof

A bottoming material and steelmaking furnace technology, applied in the field of electric arc furnace steelmaking or induction furnace steelmaking, steelmaking furnace bottoming material, to achieve the effect of high surface activity, reduce inclusions, and improve dephosphorization ability

Inactive Publication Date: 2014-05-28
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Grate-layer material of steel refining furnace, and application method thereof

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Experimental program
Comparison scheme
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 before adding glucose with a concentration of 6 wt%. 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. It is used in the steelmaking furnace, and the addition amount 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 ferrous metallurgy, in particular to a grate-layer material of a steel refining furnace, and application method thereof. The grate-layer material of the steel refining furnace consists of boron mud, strong base carbonate, lime, iron ore concentrate and aluminum ash; for electric-arc furnace steelmaking, the boron mud, the strong base carbonate, the lime, the iron ore concentrate and the aluminum ash are all prepared to powder for screening; then an organic binding agent is added; water is mixed for pelletizing; the dampproof packaging is implemented after the drying; the first batch of materials is charged in the furnace as the grate-layer material in use; for induction furnace steelmaking, the grade-layer material is required to be layered for spreading at the bottom of the furnace in batches; the boron mud, the aluminum ash, the strong base carbonate, the lime and the iron ore concentrate are spread sequentially. The grate-layer material has the functions and advantages of protecting the bottom and liner of the furnace, quickly slugging and quickly dephosphorizing at early stage, is in favor of improving the stability of early smelting, and has the characteristics of wide sources of raw materials, low cost, obvious economic benefit and worthy of promotion.

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 Applications(China)
IPC IPC(8): C21C5/52
Inventor 王宏明李兵李桂荣赵钊
Owner JIANGSU UNIV
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