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A method for producing high-quality al99.90 products in a 500ka aluminum electrolytic cell

An aluminum electrolytic cell, high-quality technology, applied in the field of aluminum electrolysis production, can solve the problems such as no, and achieve the effect of improving the effect of iron removal

Active Publication Date: 2020-04-07
GANSU DONGXING ALUMINUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The traditional 500kA aluminum electrolytic cell can only produce the highest standard Al99.88 products, and there is no relevant literature and public technology for using the traditional 500kA aluminum electrolytic cell to produce high-quality Al99.90 products

Method used

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  • A method for producing high-quality al99.90 products in a 500ka aluminum electrolytic cell
  • A method for producing high-quality al99.90 products in a 500ka aluminum electrolytic cell

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Embodiment Construction

[0036] A method for producing high-quality Al99.90 products in a 500kA aluminum electrolytic cell, comprising the steps:

[0037] A. Selection of alumina raw materials

[0038] The chemical composition of alumina meets the requirements of metallurgical grade alumina industry standard first-class product YAO-1, ​​of which Fe 2 o 3 The content does not exceed 0.01%;

[0039] B. Carbon anode selection

[0040] For the carbon anode produced without adding anode residue, the carbon anode should meet the first-class product standard, and the impurity content in the carbon anode is Fe≤250ppm, Si≤230ppm, Ca≤70ppm, V≤410ppm, Ni≤270ppm, Na≤200ppm, S ≤2.0%, Zn, Pd, Ti impurity each ≤40ppm;

[0041] C. Increase the proportion of alumina sealing anode and shell covering material

[0042] Increase the alumina content in the thermal insulation covering material and reduce the proportion of crushed material. The crushed material is only used for bottoming and edge shaping, and the rest u...

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Abstract

The invention relates to the technical field of aluminum electrolysis production, in particular to a method for producing high-quality Al99.90 products by using a traditional electrolysis equipment 500kA aluminum electrolysis cell. By improving the specific process steps of electrolytic aluminum production, the content of impurities such as iron and silicon is controlled, the ratio of aluminum oxide of covering materials sealing an anode and a shell surface is increased, the iron removal effect of broken materials is improved, high-quality dry fluoride is used, technical conditions of an aluminum electrolysis production process with resistance to temperature change is adopted, the furnace side thickness and the electrolyte level are kept stable, a non-pollution aluminum oxide anodic steelclaw protection ring is used, a special aluminum discharging, mixing furnace and casting equipment technology is adopted, and high-quality above Al99.90 products are produced. The high-quality Al99.90products can be produced by using the traditional electrolysis equipment 500kA aluminum electrolysis cell without comprehensive upgrade of equipment.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolytic production, in particular to a method for producing high-quality Al99.90 products using a 500kA aluminum electrolytic cell of traditional electrolytic equipment. Background technique [0002] The traditional 500kA aluminum electrolytic cell can only produce the highest standard Al99.88 products, and there is no relevant literature and public technology for using the traditional 500kA aluminum electrolytic cell to produce high-quality Al99.90 products. The market price of high-quality Al99.90 products is about 400 yuan / t higher than Al99.70, and about 320 yuan / t higher than Al99.85. [0003] High-quality Al99.90 products belong to the highest grade brand of the original national standard for aluminum ingots for remelting. Now high-quality Al99.90 products are included in the industry standard for refined aluminum ingots for remelting that is being revised. If high-quality Al99.90 prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/06C25C3/12
CPCC25C3/06C25C3/125
Inventor 成庚王小康杨怀安刘振乾马凯杨珅李兴亚曹亚兵马小军赵顺泽陈汉章雒焕瑾焦新材许新龙黄忠军赵永超罗映兴马海军周建强
Owner GANSU DONGXING ALUMINUM