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Separating process for aluminium electrolysis anode carbon residue and electrolyte

An aluminum electrolytic anode and electrolyte technology, which is applied in the field of separation technology of aluminum electrolytic anode carbon slag and electrolyte, can solve the problems of unsatisfactory production efficiency, inappropriate particle size of carbon slag grinding, and incomplete process methods, and achieves high production efficiency. , good separation effect, complete process effect

Inactive Publication Date: 2019-01-08
LUOYANG YUGANG LONGQUAN ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the patent CN201710131447 proposes a method for separating and recycling carbon slag and electrolyte in waste anode slag of electrolytic aluminum. Appropriate, so the production efficiency is not very ideal, and there is still considerable room for improvement

Method used

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  • Separating process for aluminium electrolysis anode carbon residue and electrolyte
  • Separating process for aluminium electrolysis anode carbon residue and electrolyte
  • Separating process for aluminium electrolysis anode carbon residue and electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The anode carbon slag is about three tons, and its separation process is as follows:

[0023] 1) Primary crushing and feeding, the carbon slag material is preliminarily crushed with a forklift, and then loaded into the hopper;

[0024] 2) Screening, the first vibrating feeder is installed at the lower part of the feeding hopper, and the material is quantitatively fed to the first belt conveyor according to the processing capacity of the secondary jaw crusher. The upper part of the first belt conveyor is equipped with a permanent magnet iron remover to remove raw materials Iron wire, iron block and other iron-containing substances contained in

[0025] 3) For the secondary jaw crusher, the first belt conveyor transports the raw materials to the material buffer bin, and the lower part of the material buffer bin is equipped with a second vibrating feeder, which performs quantitative feeding according to the production capacity of the secondary jaw crusher. Crushing the ma...

Embodiment 2

[0039] About three tons of anode carbon slag, its separation process is different from embodiment 1:

[0040] 5) Grinding carbon slag, use belt scale to feed regularly, and add water to the feed port of the ball mill to make the slurry concentration after grinding 40%, adjust the proportion of balls in the mill and the total ball loading, so that the ore with a particle size distribution of 0.15mm Abrasive is 70%;

[0041] The various technical indicators obtained according to this process are shown in Table 2:

[0042] Table II:

[0043]

Embodiment 3

[0045] About three tons of anode carbon slag, its separation process is different from embodiment 1:

[0046] 6) Grinding carbon slag, use belt scale to feed regularly, and add water at the inlet of the ball mill to make the concentration of the pulp after grinding is 45%. Abrasive is 75%;

[0047] The various technical indicators obtained according to this process are shown in Table 3:

[0048] Table three:

[0049]

[0050] It can be seen from the above examples that the separation process proposed by the present invention has a complete process flow, high electrolyte recovery rate, high product quality, and is suitable for large-scale production.

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Abstract

The invention relates to a separating process for aluminium electrolysis anode carbon residue and electrolyte. The separating process comprises the following process steps: (1) performing primary crushing and feeding; (2) screening; (3) performing secondary jaw-type crushing; (4) separating after crushing; (5) grinding the carbon residue; (6) performing floating selecting; (7) performing magneticselecting; (8) drying. The separating process for the aluminium electrolysis anode carbon residue and the electrolyte has the beneficial effects that the process is suitable for scale production, is good in separating effect and is high in production efficiency; a process flow is complete; pollutants, such as wastewater and waste gas, are not produced in the overall production process; the contentof fluorine in the treated carbon powder low is lower than national emission standards; the treated carbon powder can be directly used as a fuel or a raw material for producing an anode carbon blockwithout producing any secondary pollutants.

Description

technical field [0001] The invention relates to the production and manufacture of electrolytic aluminum, in particular to a process for separating anode carbon slag and electrolyte of aluminum electrolysis. Background technique [0002] In the production process of electrolytic aluminum, carbon slag is formed in the electrolytic cell due to various reasons such as the anode carbon body is eroded and washed by the electrolyte for a long time, and the quality is unqualified. For every ton of aluminum produced and cast, about 5-20Kg of carbon slag is produced. The main components of carbon residue are carbon powder and electrolyte, which has a certain recovery value. At present, the patent CN201710131447 proposes a method for separating and recycling carbon slag and electrolyte in waste anode slag of electrolytic aluminum. Appropriate, so the production efficiency is not very ideal, and there is still considerable room for improvement. Contents of the invention [0003] Th...

Claims

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Application Information

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IPC IPC(8): C25C3/18
CPCC25C3/18
Inventor 张洪涛时海强张义卫温铁军朱光朱红权崔永亮胡亮毅王占欣范岩峰侯飞瑞王智辉路向前杨正伟
Owner LUOYANG YUGANG LONGQUAN ALUMINUM IND CO LTD