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Method for comprehensively using water and manganese slag in electrolytic manganese production

A technology for electrolysis of manganese and manganese slag, applied in the direction of electrolysis process, electrolysis components, improvement of process efficiency, etc., can solve the problems of high equipment investment and concentration cost, difficult industrial implementation, no economic benefits, etc., and achieve high economic and environmental benefits. , The effect of less fixed investment and cost saving

Active Publication Date: 2016-01-27
永州市鑫城锰业有限公司
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Problems solved by technology

The above several patents will contain Mn 2+ 0.5~5g / L filtrate concentrated to Mn 2+ 34-36g / L concentration of the feed solution, high equipment investment and concentration costs, no economic benefits, and difficult industrial implementation

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  • Method for comprehensively using water and manganese slag in electrolytic manganese production

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Embodiment Construction

[0021] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments, a method for comprehensive utilization of electrolytic manganese production water and manganese slag, specifically comprising the following steps:

[0022] ① Catholyte replacement, coarse filtration of the new leaching slurry, and fine filtration of the coarse filtrate for electrolysis, and the manganese slag cake in the coarse filtration contains Mn 2+ 36g / L, use the cathode liquefaction slurry of the electrolytic cell, the mass ratio of slag to liquid is 1:1, 10 tons of wet slag will be produced according to 1 ton of electrolytic manganese, and 10 tons of catholyte will be consumed. After the slurry is filtered, the catholyte will contain Mn 2+ From the original 14g / L to 18 / L, it can be directly used for electrolysis; the filter cake contains 25% liquid, and the liquid contains Mn 2+ From the original 36 / L to 1...

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Abstract

The invention discloses a method for comprehensively using water and manganese slag in electrolytic manganese production. The method includes the steps that the manganese slag is subjected to slurry washing through catholytes and the water, and the manganese slag and filter liquor are respectively obtained and recycled; manganese of the manganese slag is firstly recycled, then ammonium salt and magnesium salt are recycled, and finally all the manganese slag can be used for building cement materials; and the water is firstly used for washing the manganese slag, then used for cleaning a bath and washing a membrane bag, and finally used as liquid making supplementary water and ammonia washing water, and full resource efficient use is achieved. According to the method, fixed input is low, recycling cost is low, quite high economic benefits and quite high environment-protection benefits are achieved, and the important effect is achieved on achieving high-standard clean production of the electrolytic manganese industry.

Description

technical field [0001] The invention relates to the clean production technology of electrolytic manganese metal, in particular to a method for comprehensive utilization of manganese slag and production water. Background technique [0002] In the past ten years, the electrolytic manganese industry has developed rapidly in my country. Since 2007, the output has been steadily above 1 million tons. At present, my country's electrolytic manganese production capacity and output account for more than 97% of the world's total, while my country's manganese ore The grade of manganese is low, most of which contain 6-15% manganese. Although there are also some imported high-grade ores (grade 30-40%), most of them are domestic ores. With an annual output of more than 1 million tons of electrolytic manganese, it consumes 1,000 More than 10,000 tons of manganese ore, correspondingly produce nearly 10 million tons of manganese slag. The huge amount of manganese slag has not been utilized as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/06C22B7/00C22B47/00
CPCY02P10/20
Inventor 王兆兵姚发艳
Owner 永州市鑫城锰业有限公司
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