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Method for preparing rare earth ferrosilicon alloy

A technology of rare earth ferrosilicon alloy and silica, which is applied in the field of preparation of rare earth ferrosilicon alloy, can solve the problems of low production efficiency, easy formation of furnace tumors, high energy consumption, etc., and achieve the effect of good quality, stable alloy composition and good safety

Inactive Publication Date: 2018-03-06
安吉绿金金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the energy consumption of rare earth ferrosilicon alloy is high in the production process, and furnace warts are easy to form in the furnace. After a certain number of productions, maintenance is required, and the production efficiency is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of rare earth ferrosilicon alloy, comprising the following steps:

[0022] (1) Roast bastnaesite concentrate at 450°C for 2 hours, add coke powder and charcoal powder, mix and grind into a 300-mesh mixed powder, and then bond the mixed powder with 1% of the total weight of the mixed powder The agent is mixed with water, pressed into agglomerates and dried to obtain rare earth concentrate pellets;

[0023] (2) After uniformly mixing rare earth concentrate pellets, silica, coke and steel in a weight ratio of 0.2:2.5:1.5:0.25, they are continuously added into a submerged arc furnace, heated to 1600°C and melted, and cast out of the furnace to obtain the Rare earth ferrosilicon alloy, the rare earth ferrosilicon alloy is composed of the following chemical components in mass fraction: RE 32%, Si 44%, Ca 6%, and the rest is Fe.

[0024] Wherein, the binder in step (1) is prepared by mixing bentonite, soybean powder and calcium oxide at a mass ratio of 2:...

Embodiment 2

[0027] A preparation method of rare earth ferrosilicon alloy, comprising the following steps:

[0028] (1) Roast the bastnaesite concentrate at 400°C for 1 hour, add coke powder and charcoal powder, mix and grind into a 400-mesh mixed powder, and then bond the mixed powder with 1% of the total weight of the mixed powder The agent is mixed with water, pressed into agglomerates and dried to obtain rare earth concentrate pellets;

[0029] (2) After uniformly mixing rare earth concentrate pellets, silica, coke and steel in a weight ratio of 0.1:2.5:1.8:0.15, they are continuously added into the submerged arc furnace, heated to 1550°C and melted, and then poured out of the furnace to obtain the Rare earth ferrosilicon alloy, the rare earth ferrosilicon alloy is composed of the following chemical components in mass fraction: RE 20%, Si 50%, Ca 8%, and the rest is Fe.

[0030] Wherein, the binder in step (1) is prepared by mixing bentonite, soybean powder and calcium oxide at a mass...

Embodiment 3

[0033] A preparation method of rare earth ferrosilicon alloy, comprising the following steps:

[0034] (1) Roast bastnaesite concentrate at 500°C for 1 hour, add coke powder and charcoal powder, mix and grind into a 300-mesh mixed powder, and then bond the mixed powder with 1% of the total weight of the mixed powder The agent is mixed with water, pressed into agglomerates and dried to obtain rare earth concentrate pellets;

[0035] (2) After uniformly mixing rare earth concentrate pellets, silica, coke and steel in a weight ratio of 0.1:3:1.6:0.35, they are continuously added into the submerged arc furnace, heated to 1650°C and melted, and then poured out of the furnace to obtain the Rare earth ferrosilicon alloy, the rare earth ferrosilicon alloy is composed of the following chemical components in mass fraction: RE40%, Si 35%, Ca 8%, and the rest is Fe.

[0036] Wherein, the binder in step (1) is prepared by mixing bentonite, soybean powder and calcium oxide at a mass ratio ...

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Abstract

The invention provides a method for preparing a rare earth ferrosilicon alloy, which relates to the field of alloy smelting, and comprises the following steps: (1) roasting bastnaesite concentrate at a temperature of 400-500°C, adding coke powder and charcoal powder, mixing and grinding into Mix the powder, then add water and mix the mixed powder with 1% of the total weight of the mixed powder, press into agglomerates and dry to obtain rare earth concentrate pellets; (2) mix the rare earth concentrate pellets, silica, coke After mixing uniformly with steel at a weight ratio of 0.1-0.5:2-3:1.5-1.8:0.15-0.35, it is continuously added into a submerged arc furnace, heated and melted, and poured out of the furnace to obtain the rare earth ferrosilicon alloy, the rare earth silicon The ferroalloy is composed of the following chemical components in mass fractions: RE 18-40%, Si 30-50%, Ca 3-8%, and the rest is Fe. The invention has the advantages of less energy consumption, low operation difficulty, and can suppress the generation of furnace warts. The advantages of safety and environmental protection.

Description

technical field [0001] The invention relates to the field of alloy smelting, in particular to a preparation method of a rare earth ferrosilicon alloy. Background technique [0002] Rare earth ferrosilicon alloy is an intermediate alloy composed of rare earth and ferrosilicon. As a deoxidizer, desulfurizer and alloy additive in steel production, it can change the steel matrix, improve the processing performance of steel, and improve the weldability and plasticity of steel. , toughness and other comprehensive mechanical properties, and can increase the wear resistance, pressure resistance, corrosion resistance and bending resistance of steel. Rare earth ferrosilicon is widely used in the foundry industry. In cast steel, rare earth metals can purify molten steel, improve the as-cast structure, improve the fluidity of molten steel, prevent thermal fission and improve the impact toughness of cast steel, etc. Rare earth ferrosilicon is also widely used as a nodularizer for nodula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/06C22C35/00
CPCC22B4/06C22C35/00
Inventor 矫坤远胡坚叶诗玲
Owner 安吉绿金金属材料有限公司
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