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Preparation method of cyanogen removal agent of aluminum electrolysis cell overhaul slag and application of cyanogen removal agent

An aluminum electrolytic cell and a technology for overhauling slag, applied in chemical instruments and methods, fungi, bacteria, etc., can solve the problems of high cyanide removal cost, high calcium hypochlorite price, difficult production management, etc., and achieve low production costs. , easy to obtain, easy to domesticate effects

Inactive Publication Date: 2020-01-07
平顶山市华兴浮选工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium hypochlorite has strong oxidizing properties and belongs to the hazardous chemicals within the scope of "Identification of Major Hazardous Sources of Hazardous Chemicals" (GB18218-2009). The production management is difficult, and the price of calcium hypochlorite is high, resulting in high cost of cyanide removal , the use of calcium hypochlorite will also produce secondary waste slag equivalent to the weight used, which will increase the subsequent waste slag treatment cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of a cyanide removal agent for overhauling slag of an aluminum electrolytic cell, comprising the following steps:

[0018] S1: Microbial separation: Add electroplating sewage and sludge into a sterile centrifuge tube, add sterile glass beads and sterile PBS buffer for cell culture, vortex for 2 minutes, centrifuge in a centrifuge for 5 minutes, collect the supernatant and Sludge, bacteria and fungi are isolated from electroplating sewage and sludge;

[0019] S2: Preparation of bacterial suspension: Add the bacteria isolated in S1 into a test tube containing the culture medium, add an appropriate amount of sterile water, scrape off the bacteria with an inoculation loop, pour them into a conical flask, and shake for 20 minutes to obtain a bacterial suspension liquid;

[0020] S3: Preparation of fungal suspension: add the fungus isolated in S1 into a biochemical incubator, control the temperature in the biochemical incubator to 25°C, and after a large...

Embodiment 2

[0027] A preparation method of a cyanide removal agent for overhauling slag of an aluminum electrolytic cell, comprising the following steps:

[0028] S1: Separation of microorganisms: Add electroplating sewage and sludge into a sterile centrifuge tube, add sterile glass beads and sterile PBS buffer for cell culture, vortex for 3 minutes, centrifuge in a centrifuge for 7 minutes, collect the supernatant and Sludge, bacteria and fungi are isolated from electroplating sewage and sludge;

[0029] S2: Preparation of bacterial suspension: Add the bacteria isolated in S1 into a test tube containing the culture medium, add an appropriate amount of sterile water, scrape off the bacteria with an inoculation loop, pour them into a conical flask, and shake for 22 minutes to obtain a bacterial suspension liquid;

[0030] S3: Preparation of fungal suspension: Add the fungus isolated in S1 into a biochemical incubator, and control the temperature in the biochemical incubator to 28°C. After...

Embodiment 3

[0037] A preparation method of a cyanide removal agent for overhauling slag of an aluminum electrolytic cell, comprising the following steps:

[0038] S1: Separation of microorganisms: Add electroplating sewage and sludge into a sterile centrifuge tube, add sterile glass beads and sterile PBS buffer for cell culture, vortex for 4 minutes, centrifuge in a centrifuge for 10 minutes, collect the supernatant and Sludge, bacteria and fungi are isolated from electroplating sewage and sludge;

[0039] S2: Preparation of bacterial suspension: Add the bacteria isolated in S1 into a test tube containing the culture medium, add an appropriate amount of sterile water, scrape off the bacteria with an inoculation loop, pour them into a conical flask, and shake for 25 minutes to obtain a bacterial suspension liquid;

[0040] S3: Preparation of fungal suspension: add the fungus isolated in S1 into a biochemical incubator, and control the temperature in the biochemical incubator to 30°C. Afte...

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PUM

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Abstract

The invention discloses a preparation method of a cyanogen removal agent of aluminum electrolysis cell overhaul slag and relates to the technical field of cyanogen removal agents. The preparation method comprises the following steps: separating microorganisms, preparing a bacterial suspension, preparing a fungus suspension, and mixing bacteria. The cyanogen removal agent is applied to degradationof cyanogen-containing substances in the aluminum electrolysis cell overhaul slag, the cyanogens removal agent can be put into leachate of the aluminum electrolysis cell overhaul slag, the leachate can be aerated, and then the cyanogen-containing substances in the solution can be degraded under coactions of the microorganisms and the air; and by adopting the cyanogen removal agent, bacteria and fungi are separated from electroplating sewage and sludge, a microbial agent is obtained through domestication culture and concentration, the microbial agent is easy in bacterium obtaining, simple in domestication and low in production cost and can be applied to degradation of the cyanogen-containing substances in the aluminum electrolysis cell overhaul slag, the cyanogen-containing substances in the solution can be degraded under coactions of the microorganisms and the air, and no secondary waste residues can be generated in a cyanide degradation process.

Description

technical field [0001] The invention relates to the technical field of cyanide remover, in particular to a preparation method and application of a cyanide remover for overhaul slag of an aluminum electrolytic cell. Background technique [0002] Aluminum electrolytic production requires regular maintenance and material replacement of aluminum electrolytic cells, and the feed material produced in the process is extremely large repair slag. Aluminum electrolysis production adopts the molten salt electrolysis method. During the process, the air enters the tank from the upper port of the electrolytic tank, and the nitrogen in it reacts with the carbon and sodium in the tank to form cyanide. The cyanide produced in the cathode with more air intrusion is less More, and part of the cyanide is absorbed by the tank lining, which will cause a small amount of cyanide in the overhaul slag. Cyanide is a highly toxic substance, which is extremely harmful to the human body and the environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/14C02F3/34C02F101/18
CPCC12N1/20C12N1/14C02F3/34C02F2101/18
Inventor 陈兴华覃武林周杰强王玉才马智敏严育红刘国红
Owner 平顶山市华兴浮选工程技术服务有限公司