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Method for preparing ferrosilicon alloy with aluminum ash as raw material by plasma jet feeding

A plasma and ferroalloy technology, applied in the field of electro-metallurgy, can solve the problems of resource utilization which is still in the research stage

Active Publication Date: 2020-03-20
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] From the above analysis, it can be seen that the hazardous waste and solid waste generated in the current electrolytic aluminum, aluminum processing and power industries are treated separately, most of which are in the stage of harmless treatment, and effective resource utilization is still in the research stage. As a result, the environmental pollution problems of these solid wastes have not been fundamentally solved

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  • Method for preparing ferrosilicon alloy with aluminum ash as raw material by plasma jet feeding
  • Method for preparing ferrosilicon alloy with aluminum ash as raw material by plasma jet feeding
  • Method for preparing ferrosilicon alloy with aluminum ash as raw material by plasma jet feeding

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Embodiment 1

[0043] The method for preparing Al-Si-Fe alloy with aluminum ash as raw material plasma jet feeding comprises the following steps:

[0044] Step 1, making aluminum ash, waste cathode carbon block, fly ash and diatomite waste slag in aluminum electrolytic cell overhaul slag into powder respectively, and the particle size is all less than 100 mesh;

[0045] Step 2, according to the composition of the target aluminum-silicon ferroalloy, the aluminum content is 28%, the silicon content is 61%, and the rest is iron, calcium, titanium and other trace metals, and the fixed carbon contained in the waste cathode carbon block is used as the reducing agent according to the chemical method. The metering ratio is used to calculate the mass of secondary aluminum ash, spent cathode carbon block, fly ash and diatomite waste slag required for the reduction of metal oxides, wherein the metal aluminum in the secondary aluminum ash is calculated as if all of it enters the Al-Si-Fe alloy, and the n...

Embodiment 2

[0049] The method for preparing Al-Si-Fe alloy with aluminum ash as raw material plasma jet feeding comprises the following steps:

[0050] Step 1, making aluminum ash, waste cathode carbon block, fly ash and diatomite waste slag in aluminum electrolytic cell overhaul slag into powder respectively, and the particle size is all less than 100 mesh;

[0051] Step 2, according to the composition of the target aluminum-silicon-ferroalloy: the aluminum content is 35%, the silicon content is 54%, and the rest is iron, calcium, titanium and other trace metals; the fixed carbon contained in the waste cathode carbon block is used as the reducing agent according to the chemical The metering ratio is used to calculate the mass of secondary aluminum ash, spent cathode carbon block, fly ash and diatomite waste slag required for the reduction of metal oxides, wherein the metal aluminum in the secondary aluminum ash is calculated as if all of it enters the Al-Si-Fe alloy, and the nitriding Al...

Embodiment 3

[0055] The method for preparing Al-Si-Fe alloy with aluminum ash as raw material plasma jet feeding comprises the following steps:

[0056] Step 1, making aluminum ash, waste cathode carbon block, fly ash and diatomite waste slag in aluminum electrolytic cell overhaul slag into powder respectively, and the particle size is all less than 100 mesh;

[0057] Step 2, according to the composition of the target aluminum-silicon-ferroalloy: 43% aluminum content, 47% silicon content, and the rest are iron, calcium, titanium and other trace metals; the fixed carbon contained in the waste cathode carbon block is used as the reducing agent according to the chemical The metering ratio is used to calculate the mass of secondary aluminum ash, spent cathode carbon block, fly ash and diatomite waste slag required for the reduction of metal oxides, wherein the metal aluminum in the secondary aluminum ash is calculated as if all of it enters the Al-Si-Fe alloy, and the nitriding All the aluminu...

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Abstract

The invention provides a method for preparing a silicon-iron alloy with a raw material of aluminum ash and through plasma jet feeding. According to the method, the quadratic aluminum dust is used as the raw material, an aluminum electrolysis cell waste cathode carbon block is used as a reducing agent, the aluminum content in the raw material is adjusted by taking fly ash as an additive, the content of silicon in the raw material is adjusted by taking diatomaceous earth waste residue as an additive, and high-temperature reduction is conducted on materials mainly containing aluminum oxide and silicon oxide in an electric arc furnace to obtain a certain-component aluminum-silicon-iron alloy; and a powdery material is conveyed by adopting a plasma flame flow, the reaction temperature can be increased by heating the material, reduction of the oxides and volatilization of fluoride can be accelerated, particularly decomposition of aluminum nitride in the aluminum ash, decomposition of cyanide in the waste cathode carbon block, volatilization and recovery of the fluoride, chloride and alkali metals in the material are realized in the high-temperature reduction process, the high-temperature reaction process of the whole electric arc furnace smelting is enhanced, and the production efficiency is improved, and the comprehensive utilization of each-kind dangerous waste and solid waste isrealized in the same process.

Description

technical field [0001] The invention relates to the field of electrometallurgy, in particular to a method for preparing ferrosilicon alloy by using aluminum ash as raw material by plasma jet feeding. Background technique [0002] The production methods of aluminum silicon ferrosilicon are mainly divided into metal melting method and electrothermal reduction method. The metal melting method is to use pure metal aluminum, silicon, and iron to form alloys in a molten state according to a certain proportion; the electrothermal reduction method uses oxides containing aluminum, silicon, and iron as raw materials, and carbonaceous materials as raw materials. The reducing agent is used to prepare the alloy through reduction smelting in an electric arc furnace. Among them, the metal fusion method has problems such as reheating of pure metal, secondary burning loss and high production cost. The electrothermal reduction method also has problems such as shortage of pure mineral raw ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B5/10C22B21/02C22C21/00C22C1/02C22C1/06C21C7/06C01D3/04C01D7/00
CPCC01D3/04C01D7/00C21C7/06C22B5/10C22B7/001C22B21/02C22C1/026C22C1/06C22C21/00Y02P10/20
Inventor 罗洪杰王耀武吴林丽高国磊曲杨
Owner NORTHEASTERN UNIV LIAONING
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