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Method for preparing aluminum silicon ferrosilicon by electric arc furnace smelting with aluminum ash as raw material

An electric arc furnace and raw material technology, applied in the field of electrometallurgy, can solve problems such as resource utilization is still in the research stage

Active Publication Date: 2020-05-12
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 aluminum silicon ferrosilicon by electric arc furnace smelting with aluminum ash as raw material
  • Method for preparing aluminum silicon ferrosilicon by electric arc furnace smelting with aluminum ash as raw material
  • Method for preparing aluminum silicon ferrosilicon by electric arc furnace smelting with aluminum ash as raw material

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Embodiment 1

[0040] The method for producing aluminum-silicon-ferroalloy by electric arc furnace smelting with aluminum ash as raw material comprises the following steps:

[0041] Step 1, making aluminum ash, waste cathode carbon block, fly ash and diatomite waste slag in aluminum electrolytic cell overhaul slag into powder respectively;

[0042] Step 2, according to the composition of the target aluminum-silicon-ferroalloy: 28% aluminum content, 61% silicon content, and the rest are iron, calcium, titanium and other trace metals, using the fixed carbon contained in the waste cathode carbon block as the reducing agent according to 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 aluminum is decomposed into metal a...

Embodiment 2

[0046] The method for producing aluminum-silicon-ferroalloy by electric arc furnace smelting with aluminum ash as raw material comprises the following steps:

[0047] Step 1, making aluminum ash, waste cathode carbon block, fly ash and bituminous coal in aluminum electrolytic cell overhaul slag into powder respectively;

[0048] 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 All the aluminum is decompose...

Embodiment 3

[0052] The method for producing aluminum-silicon-ferroalloy by electric arc furnace smelting with aluminum ash as raw material comprises the following steps:

[0053] Step 1, making aluminum ash, waste cathode carbon block, fly ash and diatomite waste slag in aluminum electrolytic cell overhaul slag into powder respectively;

[0054] 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 aluminum is decomposed into m...

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Abstract

The invention provides a method for producing aluminum ferro-silicon alloy by electric arc furnace smelting using aluminum ash as raw material, using secondary aluminum ash as raw material, aluminum electrolytic cell waste cathode carbon block as reducing agent, and fly ash as additive to adjust the content of the raw material. The aluminum content in the raw material is adjusted by using diatomite waste as an additive. Materials mainly composed of alumina and silicon oxide are reduced at high temperature in an electric arc furnace to prepare a certain composition of aluminum-silicon ferroalloy; during the high-temperature reduction process, aluminum is achieved The decomposition of aluminum nitride in the ash and the decomposition of cyanide in the spent cathode carbon block, as well as the volatilization and recovery of fluoride, chloride and alkali metals in the materials, this batching method not only utilizes a variety of wastes, but is also easy to prepare various The aluminum-silicon ferroalloy with this composition is adapted to the smelting process of the electric arc furnace, making it easy to control the smelting process and alloy composition, which helps reduce production costs and creates conditions for subsequent processing.

Description

technical field [0001] The invention relates to the field of electrometallurgy, in particular to a method for preparing aluminum silicon ferrosilicon by electric arc furnace smelting with aluminum ash as raw material. 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 p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06C22B7/02C22C1/02C22C1/06C22C28/00
CPCC22B4/06C22B7/006C22B7/02C22C1/02C22C1/06C22C28/00Y02P10/20
Inventor 罗洪杰王耀武梁英坚吴林丽高国磊曲杨
Owner NORTHEASTERN UNIV LIAONING
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