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Environmentally-friendly treatment and utilization method for waste cathode carbon block and carbon residues of electrolytic cell body

A cathode carbon block and electrolytic cell technology, which is applied in the preparation/purification of carbon, etc., can solve the problems of environmental impact, inability to ensure the purity of carbon, inability to separate electrolyte and carbon, etc., and achieve the effect of reducing the content

Inactive Publication Date: 2019-03-08
湖南涌鑫源环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment method of cathode carbon block is flotation method, and the carbon in the cathode carbon block is extracted by flotation method, but the flotation equipment in the current processing system cannot completely separate the electrolyte from the carbon, so As a result, the extracted carbon powder contains a small amount of electrolyte, so the purity of the carbon cannot be guaranteed, and the accumulation of carbon will also have a relatively large impact on the environment

Method used

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Examples

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Embodiment Construction

[0014] Environmentally friendly treatment and utilization methods for the discarded cathode carbon blocks and carbon residues in the electrolytic cell:

[0015] 1. The blocky cathode carbon block is crushed into a multi-channel crushing gear roller to form a granular shape, and then the granular cathode carbon block is ground by a grinding device to reduce the particle size of the cathode carbon block, so that the particle size is about 150 mesh. In this way, the carbon particles in the cathode carbon block are separated from the electrolyte particles, so that the subsequent carbon is separated from the electrolyte;

[0016] 2. Transport the ground cathode carbon block particles to the calcination mechanism through the conveyor belt for calcination. The calcination mechanism is a rotating calcination roller. Put the cathode carbon block particles into the calcination roller for calcination. A heating box is arranged on the outer wall of the heating box, and the outer wall of t...

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Abstract

The invention discloses an environmentally-friendly treatment and utilization method for a waste cathode carbon block and carbon residues of an electrolytic cell body. After the cathode carbon block is pulverized, toxic gas in the cathode carbon block is removed by calcination, and the cathode carbon block is completely mixed with a flotation agent in a pulverizing manner; carbon in the cathode carbon block is separated by multiple flotations, so that the content of electrolyte in the separated carbon is reduced; moreover, the paste-like carbon is a transportation-facilitated powdery carbon through pressure filtering.

Description

technical field [0001] The invention relates to a treatment method for cathode carbon blocks, in particular to an environmentally friendly treatment and utilization method for discarded cathode carbon blocks and carbon slag in an electrolytic cell body. Background technique [0002] The waste cathode carbon block of aluminum electrolytic cell is the waste discharged in the aluminum motor industry. With the increase of the annual output of aluminum metal in the world, the number of discharged cathode carbon blocks continues to increase. The carbon content in the cathode carbon block is 45-85%. The electrolyte content is about 15~55% (the electrolyte is mainly composed of cryolite, sodium fluoride, alumina and calcium fluoride, and some waste cathode carbon blocks contain a small amount of cyanide), and the carbon in the cathode carbon blocks can be recycled use; [0003] At present, the treatment method of cathode carbon block is flotation method, and the carbon in the catho...

Claims

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Application Information

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IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 张卫
Owner 湖南涌鑫源环保有限公司