Method for producing AlSiF from waste refractory material by plasma jet feeding

A waste refractory material and plasma technology, applied in the field of electrometallurgy, can solve the problems that resource utilization is still in the research stage

Active Publication Date: 2020-01-07
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] 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 producing AlSiF from waste refractory material by plasma jet feeding
  • Method for producing AlSiF from waste refractory material by plasma jet feeding
  • Method for producing AlSiF from waste refractory material by plasma jet feeding

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Embodiment 1

[0041] The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material by plasma jet feeding comprises the following steps:

[0042] Step 1, the waste refractory material, waste cathode carbon block and fly ash in the overhaul slag of the aluminum electrolytic cell are made into powder respectively, and the particle size is less than 100 mesh;

[0043] Step 2, according to the composition of the target aluminum silicon ferroalloy: aluminum content 25%, silicon content 65%, the rest is iron, calcium, titanium and other trace metals, using the fixed carbon contained in the waste cathode carbon block as the reducing agent according to the chemical The metering ratio is used to calculate the mass of waste refractory materials, waste cathode carbon blocks and fly ash required to reduce metal oxides, and finally the mass ratio of waste refractory materials, fly ash and waste cathode carbon blocks is 1:6:4. Put the waste refractory material, waste cathode c...

Embodiment 2

[0047] The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material by plasma jet feeding comprises the following steps:

[0048] Step 1, the waste refractory material in the overhaul slag of the aluminum electrolytic cell, the waste cathode carbon block, the fly ash and the diatomite waste slag are respectively made into powders, and the particle size is less than 100 mesh;

[0049] Step 2, according to the composition of the target aluminum-silicon-ferroalloy: aluminum content 27%, silicon content 63%, 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 waste refractories, fly ash and spent cathode carbon blocks required to reduce metal oxides, and the mass ratio of waste refractory materials, fly ash to spent cathode carbon blocks is 1:3:2; Put the refractory materi...

Embodiment 3

[0053] The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material by plasma jet feeding comprises the following steps:

[0054] Step 1, the waste refractory material, waste cathode carbon block and fly ash in the overhaul slag of the aluminum electrolytic cell are made into powder respectively, and the particle size is less than 100 mesh;

[0055] Step 2, according to the composition of the target aluminum silicon ferroalloy: the aluminum content is 31%, the silicon content is 58%, 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 waste refractories, fly ash, and spent cathode carbon blocks required to reduce metal oxides, and the mass ratio of waste refractory materials, fly ash to spent cathode carbon blocks is 1:1:1; Put the refractory material, waste cathode car...

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Abstract

The invention provides a method for preparing ferro-silicon-aluminium by using waste refractory materials as raw materials through plasma jet feeding. The waste refractory materials are used as raw materials. An aluminum electrolysis cell waste cathode carbon block is used as a reducing agent. The aluminum content in the raw materials is adjusted by taking fly ash as an additive. The silicon content in the raw materials is adjusted by taking diatomite waste residues as an additive. High-temperature reduction is carried out on raw materials mainly including aluminum oxide and silicon oxide in an electric arc furnace to prepare a certain-component aluminum-silicon-iron alloy. In the high-temperature reduction process, cyanide in the waste cathode carbon block is decomposed, and the volatilization and recovery of fluoride, chloride and alkali metals in materials are realized. The comprehensive utilization of a plurality of kinds of dangerous waste and solid waste is realized in the same process.

Description

technical field [0001] The invention relates to the field of electrometallurgy, in particular to a method for preparing aluminum silicon ferrosilicon by using waste refractory materials as raw materials 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 short...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B5/10C22B21/02C22C21/00C22C1/02C22C1/06C21C7/06
CPCC21C7/06C22B5/10C22B7/001C22B21/02C22C1/02C22C1/06C22C21/00Y02P10/20
Inventor 罗洪杰吴林丽徐建荣张志刚刘宜汉
Owner NORTHEASTERN UNIV LIAONING
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