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Treatment method for manganese fixation and ammonia removal of electrolytic manganese slag

A technology of electrolytic manganese slag and treatment method, which is applied in the direction of chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problems of secondary pollution and high cost of electrolytic manganese slag, and avoid pollution and avoid secondary pollution , The effect of simplifying the process

Active Publication Date: 2021-02-26
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of studies have been conducted on the harmless treatment of electrolytic manganese slag at home and abroad. Quicklime (calcium oxide) is used as a neutralizing agent to fix soluble manganese into insoluble substances. This prior art has indeed achieved good technical results. , but ammonia nitrogen is easy to form ammonia gas and cause secondary pollution. In addition, the cost of treating electrolytic manganese slag with quicklime is relatively high

Method used

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  • Treatment method for manganese fixation and ammonia removal of electrolytic manganese slag

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: a kind of treatment method of electrolytic manganese slag solid manganese removal ammonia, this method comprises the following steps:

[0032] (1) With a sintering temperature of 900°C, a holding time of 25 minutes, and a heating rate of 5°C / min, the phosphorous tailings are calcined to obtain phosphorous tailings clinker;

[0033] (2) Add 500 kg of water and 10 kg of phosphorous tailings clinker to 80 kg of electrolytic manganese slag and adopt biaxial stirring reaction. The time of stirring reaction is 160 minutes, the temperature of stirring reaction is 20 ° C, and the gas generated during the reaction is collected. Send it into the ammonia gas recovery system to obtain the mixture;

[0034] (3) The mixture is filtered, and while filtering, the generated gas is collected and sent to the ammonia gas recovery system, then the filter residue is taken and dried at 50° C. to obtain electrolytic manganese slag for solid manganese and ammonia removal;

[0035...

Embodiment 2

[0036] Embodiment 2: a kind of treatment method of electrolytic manganese slag solid manganese removal ammonia, this method comprises the following steps:

[0037] (1) With a sintering temperature of 1000°C, a holding time of 30 minutes, and a heating rate of 10°C / min, the phosphorous tailings are calcined to obtain phosphorous tailings clinker;

[0038] (2) Add 600kg water and 12kg phosphorus tailings clinker to 100kg electrolytic manganese slag, adopt planetary stirring reaction, the time of stirring reaction is 180min, the temperature of stirring reaction is 40 ℃, and the gas that produces in the reaction process is collected and sent into the ammonia recovery system to obtain the mixture;

[0039] (3) The mixture is filtered, and while filtering, the generated gas is collected and sent to the ammonia gas recovery system, then the filter residue is taken and dried at 60° C. to obtain electrolytic manganese slag for solid manganese and ammonia removal;

[0040] In the steps (...

Embodiment 3

[0041] Embodiment 3: a kind of treatment method of electrolytic manganese slag solid manganese removal ammonia, this method comprises the following steps:

[0042] (1) With a sintering temperature of 900°C, a holding time of 35 minutes, and a heating rate of 5°C / min, the phosphorous tailings are calcined to obtain phosphorous tailings clinker;

[0043] (2) Add 700kg of water and 10kg of phosphorous tailings clinker to 80kg of electrolytic manganese slag, adopt biaxial stirring reaction, the time of stirring reaction is 160min, the temperature of stirring reaction is 50°C, and the gas generated during the reaction is collected Send it into the ammonia gas recovery system to obtain the mixture;

[0044] (3) The mixture is filtered, and while filtering, the generated gas is collected and sent to the ammonia gas recovery system, and then the filter residue is taken and dried at 70° C. to obtain electrolytic manganese slag for manganese removal and ammonia removal;

[0045] In the...

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Abstract

The invention discloses a treatment method for manganese fixation and ammonia removal of electrolytic manganese slag. The method comprises the following steps of: (1) calcining phosphate tailings to obtain phosphate tailing clinker; (2) adding water and the phosphate tailing clinker into the electrolytic manganese slag, stirring for reaction, and collecting and feeding gas generated in the reaction process into an ammonia gas recovery system to obtain a mixture; and (3) filtering the mixture, collecting and feeding the generated gas into the ammonia gas recovery system while filtering, then taking filter residues, and drying to obtain the electrolytic manganese slag for manganese fixation and ammonia removal. The treatment method disclosed by the invention has the advantages that the requirements of solid wastes after treatment can be met, the cost of curing and stabilizing treatment of the electrolytic manganese slag is remarkably reduced, meanwhile, the treatment process is simplified, and the feasibility of industrial application is improved.

Description

technical field [0001] The invention relates to a treatment method of electrolytic manganese slag, in particular to a treatment method of electrolytic manganese slag for fixing manganese and removing ammonia. Background technique [0002] Electrolytic manganese slag belongs to general industrial solid waste (Class II). Electrolytic manganese slag is the acid slag generated during the production of electrolytic manganese metal, which contains a large amount of harmful substances. With the rapid development of the electrolytic manganese industry, the environmental problems caused by the accumulation of electrolytic manganese slag are particularly prominent. However, due to technical limitations, most of the manganese slag cannot be fully utilized. However, random stacking of manganese slag that has not been properly treated will cause great harm to the environment. Waste of resources, which contain usable substances such as manganese. [0003] Soluble Mn in the leaching solu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00A62D3/33A62D101/43
CPCB09B3/00B09B5/00A62D3/33A62D2101/43B09B3/20
Inventor 陈前林张煜冯圣霞杨敏段江飞贺维龙李瑞
Owner GUIZHOU UNIV
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