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Method for preparing aluminum silicon ferroalloy by feeding hollow electrode with waste refractory material as raw material

A technology of waste refractory materials and hollow electrodes, which is applied in the field of electrometallurgy and can solve problems such as resource utilization is still in the research stage

Active Publication Date: 2020-03-24
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 preparing aluminum silicon ferroalloy by feeding hollow electrode with waste refractory material as raw material
  • Method for preparing aluminum silicon ferroalloy by feeding hollow electrode with waste refractory material as raw material
  • Method for preparing aluminum silicon ferroalloy by feeding hollow electrode with waste refractory material as raw material

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Embodiment 1

[0042] The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material for hollow electrode feeding comprises the following steps:

[0043] Step 1, the waste refractory material in the overhaul slag of the aluminum electrolytic cell, the waste cathode carbon block, and the fly ash are respectively made into powders, and the particle size is 100 mesh;

[0044] 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 ca...

Embodiment 2

[0048] The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material for hollow electrode feeding comprises the following steps:

[0049] Step 1, the waste refractory material in the overhaul slag of the aluminum electrolytic cell, the waste cathode carbon block, and the fly ash are respectively made into powders, and the particle size is 100 mesh;

[0050] 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 material, waste cathode carbon blo...

Embodiment 3

[0054] The method for preparing Al-Si-Fe alloy by using waste refractory material as raw material for hollow electrode feeding comprises the following steps:

[0055] Step 1, the waste refractory material in the overhaul slag of the aluminum electrolytic cell, the waste cathode carbon block, and the fly ash are respectively made into powders, and the particle size is 100 mesh;

[0056] 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 cath...

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Abstract

The invention provides a method for preparing aluminum-silicon ferroalloy by feeding hollow electrodes as raw materials, using waste refractory materials as raw materials, aluminum electrolytic cell waste cathode carbon blocks as reducing agents, and fly ash as additives to adjust the raw materials. The aluminum content in the material is adjusted by using diatomite waste as an additive to adjust the silicon content in the raw materials. Materials mainly composed of alumina and silicon oxide are reduced at high temperature in the electric arc furnace to prepare a certain composition of aluminum-silicon ferroalloy; hollow electrodes are used to transport the powder. Materials can strengthen the entire electric arc furnace smelting process, promote the reduction of oxides and the volatilization of fluorides, especially accelerate the decomposition of toxic cyanide, as well as the volatilization and recovery of fluorides, chlorides and alkali metals in the materials, and improve production efficiency. , reduce production costs, and achieve comprehensive utilization of multiple hazardous wastes and solid wastes 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-iron alloys by feeding hollow electrodes with waste refractories as raw materials. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B21/00C21C7/06C22B5/04C22B26/22
CPCC21C7/06C22B5/04C22B7/001C22B21/0007C22B21/0069C22B26/22Y02P10/134Y02P10/20
Inventor 罗洪杰吴林丽徐建荣张志刚刘宜汉
Owner NORTHEASTERN UNIV LIAONING
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