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Method for producing electrolytic manganese metal with manganese oxide ore

A technology for electrolysis of manganese metal and manganese oxide ore, which is applied in the directions of instruments, optics, photography, etc., can solve the problems of low reduction conversion rate of high-priced manganese, cannot replace manganese carbonate ore, and low recovery rate of manganese metal, and achieves good economic benefits and social benefits. Benefit, high Mn recovery rate, the effect of reducing Mn loss

Inactive Publication Date: 2015-03-11
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, several enterprises have been using manganese oxide ore to produce electrolytic manganese metal process tests, mainly using fire reduction or wet reduction, but these two methods cannot replace manganese carbonate ore due to their high cost.
Among them, the fire reduction conversion method is more common, but because the roaster equipment used by many manufacturers is too simple, the energy consumption in the production process is large, and a large amount of SO2 is generated during the roasting process. 2 Smoke and dust pollution, and the reduction conversion rate of high-valent manganese is low, and the recovery rate of metal manganese is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for utilizing manganese oxide ore to produce electrolytic metal manganese comprises the following steps:

[0020] (1) Select manganese oxide ore particles with a particle size of 5-8mm, adjust its moisture content to 13%, mix the manganese oxide ore particles and coal powder according to the ore-to-coal ratio of 1:0.04, and put them into the muffle furnace Roast at a temperature of 500°C for 30 minutes, and turn it once in the middle to reduce the manganese oxide ore to form MnO, and then use 20g / L H 2 SO 4 Leaching at normal temperature, wherein the acid ore ratio is 0.4:1, the solid-liquid ratio is 8:1, and the leaching time is 2h to obtain a manganese sulfate solution containing impurities;

[0021] (2) Add mass concentration to the manganese sulfate solution containing miscellaneous then is 25% ammoniacal liquor under agitation state, carry out pressure filtration after being neutralized to pH value 6-7, then add vulcanizing agent dimethylamino disulfide...

Embodiment 2

[0024] The method for utilizing manganese oxide ore to produce electrolytic metal manganese comprises the following steps:

[0025] (1) Select manganese oxide ore particles with a particle size of 6-10mm, adjust its moisture content to 16%, mix the manganese oxide ore particles and coal powder according to the ore-to-coal ratio of 1:0.06, and put them into the muffle furnace Roast at a temperature of 900°C for 60 minutes, and turn it twice in the middle to reduce the manganese oxide ore to form MnO, and then use 35g / L H 2 SO 4 Leaching at normal temperature, wherein the acid ore ratio is 0.6:1, the solid-liquid ratio is 10:1, and the leaching time is 3 hours to obtain a manganese sulfate solution containing impurities;

[0026] (2) Add mass concentration to the manganese sulfate solution containing miscellaneous then and be the ammoniacal liquor of 25%, carry out pressure filtration after being neutralized to pH value 7, then add vulcanizing agent dimethylaminodithio in the f...

Embodiment 3

[0029] The method for utilizing manganese oxide ore to produce electrolytic metal manganese comprises the following steps:

[0030] (1) Select manganese oxide ore particles with a particle size of 6-8mm, adjust its moisture content to 14.5%, mix the manganese oxide ore particles and coal powder according to the ore-to-coal ratio of 1:0.05, and put them into the muffle furnace Roast at a temperature of 800°C for 40 minutes, and turn it twice in the middle to reduce the manganese oxide ore to form MnO, and then use 30g / L H 2 SO 4 Leaching at normal temperature, wherein the acid ore ratio is 0.5:1, the solid-liquid ratio is 8.6-10:1, and the leaching time is 2 hours to obtain a manganese sulfate solution containing impurities;

[0031] (2) Add mass concentration to the manganese sulfate solution containing impurities under stirring state and be 25% ammoniacal liquor, press filter after being neutralized to a pH value of 6.5, then add vulcanizing agent barium sulfide to remove im...

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PUM

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Abstract

The invention discloses a method for producing electrolytic manganese metal with manganese oxide ore and belongs to the technical field of electrode material preparation. The method comprises the following steps: (1) manganese oxide ore particles and coal powder are mixed uniformly at the ratio of 1:(0.04-0.06) and placed in a muffle furnace to be calcined to reduce manganese oxide ore to MnO, and MnO is subjected to leaching with H2SO4 at normal temperature to obtain a manganese sulfate solution containing impurities; (2) ammonia water is added into the manganese sulfate solution to neutralize the manganese sulfate solution, filter pressing is conducted after the pH value is 6-7, a vulcanizing agent is added into a filtrate to remove impurities, and filtering is conducted to obtain a filtrate which is a purified manganese sulfate solution; (3) and the purified manganese sulfate solution is poured into an electrolytic bath, the pH value in the electrolytic bath is controlled to be 7.0-8.0, electrolysis is conducted at 35-40 DEG C at least for 24 hours, and then the electrolytic manganese metal is obtained. The method provided by the invention reasonably utilizes the manganese ore resource and reduces the production cost.

Description

technical field [0001] The invention relates to the technical field of electrode material preparation, in particular to a method for producing electrolytic metal manganese by using manganese oxide ore. Background technique [0002] Electrolytic manganese metal is widely used in metallurgy, medicine, electronics, communication and other fields. With the development of science and technology, the application of electrolytic manganese continues to expand, and the market demand increases by about 15% annually. At present, the main method of producing electrolytic manganese metal in my country is to use manganese carbonate ore or sintered manganese ore as the main ore, and use manganese dioxide ore to remove iron to produce electrolytic manganese metal. Due to the limited resources of manganese carbonate ore in China, and the grade is decreasing year by year, coupled with the random digging of manganese carbonate ore in some places, mining the rich and abandoning the poor, the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/08C25C1/06
Inventor 李建军韦业雄农承开盛波陆毅
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND