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Method for recycling manganese sulfate by using electrolytic metal manganese waste slag

A technology for electrolysis of metal manganese and waste slag, applied in manganese sulfate and other directions, can solve the problems of low manganese recovery rate, high energy consumption and high production cost, and achieve the effects of improving product quality, low energy consumption and reducing production cost

Inactive Publication Date: 2010-07-07
杜祖德
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Problems solved by technology

[0005] 2. High production cost and high energy consumption: 1.2-1.5 tons of coal is required to produce 1 ton of manganese sulfate;
[0006] 3. Low manganese recovery rate: the highest manganese recovery rate is only 60-65%

Method used

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Embodiment Construction

[0015] A method for recovering ammonium sulfate from waste slag of electrolytic manganese metal, which comprises heating the waste slag slurry of electrolytic manganese metal, removing iron, removing heavy metal, neutralizing, and press-filtering, and the content is 160g / L~ The manganese sulfate solution of 200g / L is pumped into the manganese sulfate solution according to 80% of the total volume of the crystallization pot for crystallization and purification:

[0016] Crystallization: Turn on the mixer to stir, the stirring speed of the crystallization pot is 30-64 rpm; turn on the heat source switch to heat the solution in the pot, the heating heat source can be saturated steam, superheated steam, oil furnace, electric heating tube heating, infrared heating and medium and high Frequency electromagnetic heating; when a large amount of steam is discharged from the vent valve port, close the vent valve and start timing, heat up to 100 ° C ~ 150 ° C, the heating time is controlled...

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Abstract

The invention discloses a method for recycling manganese sulfate by using electrolytic metal manganese waste slag, which comprises the following steps of: carrying out heating reaction, deironing, heavy metal removal, neutralizing and filter-pressing on waste slag for producing the electrolytic metal manganese to obtain 160-200g / L manganese sulfate solution, pumping the manganese sulfate solution for crystallization and purification. The crystallization purification comprises process of crystallization, solid-liquid separation, dissolution, filter-pressing and the like, and the filter-pressed manganese sulfate solution also can be repeatedly crystallized and purified for many times according to requirements. Various manganese products taking the manganese sulfate as raw material are produced by using the method of recycling manganese sulfate by using the waste slag for producing the electrolytic metal manganese, the method not only reduces the production cost, but also improves product quality with low production energy consumption and no environment pollution, and three-waste emission can achieve the national environmental protection emission standard.

Description

technical field [0001] The invention relates to a method for producing manganese sulfate, in particular to a method for recovering manganese sulfate by electrolyzing metal manganese waste slag. Background technique [0002] Manganese sulfate is used to process various manganese products such as: electrolytic manganese dioxide, high-purity manganese carbonate, electronic grade manganese tetraoxide, electronic grade manganese monoxide, chemical manganese dioxide, industrial grade manganese sulfate monohydrate, chemical grade one Manganese sulfate water, pharmaceutical grade manganese sulfate monohydrate, food grade manganese sulfate monohydrate, analytical pure manganese sulfate monohydrate, etc. The existing production method of electrolytic manganese metal is: use a crusher to crush the manganese ore into particles below 2mm, then use a wet mill to grind the manganese ore into -100 mesh pulp, and then crush the pyrite containing S ≥ 32%. Use a wet mill to grind -100 mesh pu...

Claims

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Application Information

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IPC IPC(8): C01G45/10C22B7/00C22B3/04C22B3/20C22B47/00
Inventor 杜祖德
Owner 杜祖德
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