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Method for reducing MnO2 in anode mud to MnO by using high-temperature reduction method

A technology of anode slime and reduction method, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve environmental pollution and other problems, and achieve the effect of low price

Inactive Publication Date: 2008-09-17
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not produce secondary pollution, solves the problem of environmental pollution caused by electrolytic manganese anode slime in the stacking process, and at the same time realizes the resource utilization of electrolytic manganese slag anode slime

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Using electrolytic manganese anode slime and carbon powder as raw materials, it is prepared as follows:

[0024] According to the mass ratio of electrolytic manganese anode slime and carbon powder 17:1, mix evenly, react at 1300 ° C for 5 hours, and cool to room temperature under the condition of nitrogen protection to obtain a grass green mixture, in which the content of MnO is 85%, and the density is 5.45 g / cm 3 . The product can be directly returned to the production process of electrolytic manganese metal as raw material for production.

Embodiment 2

[0026] Using electrolytic manganese anode slime and carbon powder as raw materials, it is prepared as follows:

[0027] Mix electrolytic manganese anode slime and carbon powder uniformly at a mass ratio of 25:1, react at 1600°C for 4 hours, and cool to room temperature under nitrogen protection to obtain a grass-green mixture, in which the content of MnO is 86%, and the density is 5.42 g / cm 3 . The product can be directly returned to the production process of electrolytic manganese metal as raw material for production.

Embodiment 3

[0029] Mix electrolytic manganese anode slime and carbon slag uniformly at a mass ratio of 10:1, react at 1600°C for 2 hours, and cool to room temperature under nitrogen protection to obtain a grass-green mixture, in which the content of MnO is 88%, and the density is 5.44 g / cm 3 . The product can be directly returned to the production process of electrolytic manganese metal as raw material for production.

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Abstract

The invention relates to a method for reducing principal component MnO2 in waste anode mud produced in electrolytic manganese production process to MnO by using high temperature direct reduction method, and belongs to the resource utilization and environmental protection fields. The method comprises the steps of mixing electrolytic manganese anode mud and a reducer in a reaction vessel, allowing reaction at 800-1,600 DEG C for 1-6 hours, naturally cooling to room temperature under the protection of nitrogen gas and reducing atmosphere to obtain a mixed product containing MnO particles, and directly recycling to electrolytic manganese production or further separating and purifying to obtain MnO product. The inventive method solves the waste pollution and resource utilization problems in electrolytic manganese industry, produces new product with high added value by using anode mud, recycles and reutilizes resources, and can bring distinct economic, environmental and social benefits.

Description

technical field [0001] The present invention relates to a kind of main component MnO of waste anode slime produced in electrolytic metal manganese production 2 The invention relates to a high-temperature direct reduction process method into MnO, which belongs to the field of resource recycling and environmental protection in the electrolytic manganese industry. Background technique [0002] my country's economic reserves of manganese ore resources are 302 million tons, ranking seventh. At present, my country is the largest producer, consumer and exporter of electrolytic manganese. The main manganese products in my country include electrolytic manganese metal, manganese dioxide, manganese tetraoxide and series of manganese salt products. Among them, electrolytic manganese is the most widely used manganese product with the largest consumption. There are more than 164 electrolytic manganese enterprises in my country, and the production capacity of electrolytic manganese has r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 段宁于宏兵华涛王鸞潘涔轩周长波展思辉朱春雷彭晓成杨俊峰
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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