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Method for preparing AL-Si-Fe alloy using powdered coal ash as raw material

A fly ash and ferroalloy technology, applied in the field of metal materials, can solve the problems of high energy consumption, high cost, and long production process of blending method

Inactive Publication Date: 2006-12-20
北京炎黄投资管理有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a method for producing aluminum silicon ferroalloy with fly ash as raw material, and solve the problems of long production process, high energy consumption and high cost of blending method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: In 100KVA DC electric arc furnace, use fly ash as raw material to produce aluminum silicon ferroalloy

[0016] A 100KVA DC electric arc furnace is used, and the ratio of raw materials is: 58% of fly ash, 30% of coal slime and petroleum coke, and 6% of pulp waste liquid, 4% of water and 2% of barium-calcium composite additives are added. The weight percentage content of alumina in the raw material is 35%, the weight percentage content of silicon oxide is 45%, the weight percentage content of ferric oxide is 14%, and the rest are other impurity minerals; coal slime and petroleum coke are reducing agents, and the coal slime moisture is 4.0% %, volatile matter 30.0%, ash content 8.0%, petroleum coke moisture 0.5%, volatile matter 12.0%, the ratio of coal slime to petroleum coke is 6:4; pulp waste liquid is binder, moisture 50.0%, ash content 10.0%, volatile Point 40.0%. The operating voltage is 35V and the current is 1600A. The aluminum-silicon alloy is rele...

Embodiment 2

[0017] Embodiment 2: In 100KVA DC electric arc furnace, use fly ash, kaolin, iron ore powder as raw material to produce aluminum silicon ferroalloy

[0018] A 100KVA DC electric arc furnace is used, and the ratio of raw materials is: 50% of fly ash, 20% of kaolin, 20% of coal slime and petroleum coke, 6% of waste paper slurry and 5% of water. The weight percentage content of alumina in the raw material is 40%, the weight percentage content of silicon oxide is 50%, and the weight percentage content of ferric oxide is 15%. %, ash content 8.0%, petroleum coke moisture 0.5%, volatile matter 12.0%, coal slime and petroleum coke ratio 7:3; pulp waste liquid is binder, moisture 50.0%, ash content 10.0%, volatile matter 40.0%. The operating voltage is 35V and the current is 1600A. The aluminum-silicon alloy is released every 4 hours, and the aluminum-silicon-ferroalloy containing 31% by weight of aluminum, 47% by weight of silicon and 20% by weight of iron is prepared, and the balanc...

Embodiment 3

[0019] Embodiment 3: In 10000KVA AC submerged arc furnace, use fly ash as raw material to produce aluminum silicon ferroalloy

[0020] A 10000KVA AC submerged arc furnace is used, the raw material is fly ash, the weight percentage content of alumina is 35.0%, the weight percentage content of silicon oxide is 48%, and the content of ferric oxide is 10% by weight; coal slime and petroleum coke are reducing agents, Among them, the coal slime moisture is 4.0%, the volatile matter is 30.0%, the ash content is 8.0%, the petroleum coke moisture content is 0.5%, the volatile matter content is 12.0%, and the ratio of coal slime and petroleum coke is 7:3; the pulp waste liquid is a binder, and the moisture content is 50.0%, The ash content is 10.0%, and the volatile matter is 40.0%. A barium-calcium composite additive with a content of 2% by weight is added. The aluminum-silicon alloy is released every 4 hours, and the aluminum-silicon-ferroalloy containing 28% by weight of aluminum, 48...

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Abstract

A process for preparing AlSiFe alloy with powdered coal ash includes such steps as proportionally mixing powdered coal ash with coal, mud, petroleum coke, waste paper pulp, water and composite BaCa additive through grinding, sphericizing, baking at 100-150 deg.C, loading in arc furnace, heating to 1700-1900 deg.C, reducing reaction, discharging molten alloy every 2-4 hr, adding refining agent for removing slags, filtering, mixing diluent and casting.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a method for producing aluminum-silicon-ferroalloys using fly ash as a raw material. Background technique [0002] As a deoxidizer for steelmaking, aluminum silicon ferroalloy is mainly produced by blending method in my country at present. That is, the primary aluminum produced by electrolysis and the ferrosilicon produced by industry are remelted and mixed in proportion. In this way, the process from ore to finished product can only be completed through multiple processes such as alumina plant, electrolytic aluminum plant, industrial ferrosilicon plant, etc. The long production process and high energy consumption make the cost of aluminum-silicon alloy remain high, and the production process has a great impact on the environment. In order to reduce the production cost of sendust, it is reported that using sendust ore such as bauxite, bauxite, kyanite, silica ore to add iron ore p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/00C22C1/02C22C1/06C22C1/10C22C30/00
Inventor 卢惠民陈明法刘强徐佩声
Owner 北京炎黄投资管理有限公司
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