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Method for producing electrolytic metal manganese by roasting manganese carbonate ore and 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., to achieve the effects of reducing consumption, reducing Mn loss, and reducing production costs

Active Publication Date: 2017-09-26
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, there is no relevant report on the use of the above method to produce electrolytic manganese metal

Method used

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  • Method for producing electrolytic metal manganese by roasting manganese carbonate ore and manganese oxide ore
  • Method for producing electrolytic metal manganese by roasting manganese carbonate ore and manganese oxide ore
  • Method for producing electrolytic metal manganese by roasting manganese carbonate ore and manganese oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The process of using manganese oxide ore to roast MnO roasted ore is as follows: crush the manganese oxide ore to a particle size of 2-10 mm, adjust its moisture content to 13%, mix the manganese oxide ore particles and coal powder according to the weight ratio of ore coal to 1:0.04. Mix them evenly, put them into a muffle furnace and roast at a temperature of 800°C for 30 minutes, and stir once in the middle, so that the manganese oxide ore is reduced to MnO, and the roasted ore is obtained;

Embodiment 2-5

[0027] The difference between Examples 2-5 and Example 1 is that the weight ratio of manganese oxide ore particles and coal powder is 1:0.05, 1:0.06, 1:0.07, 1:0.08 according to the weight ratio of ore coal.

[0028] Calculate the Mn reduction conversion rate of the roasted ore obtained in Examples 1-5, and the results are shown in Table 1.

[0029] Table 1 Reduction conversion rate results at different ore-coal weight ratios

[0030]

[0031] It can be seen from the results in Table 1 that when the weight ratio of ore to coal is 1:0.05-0.08, the conversion rate of Mn can reach more than 93.66%.

Embodiment 6

[0034] The process of mixed leaching using the roasted ore of manganese carbonate ore and manganese oxide ore is as follows:

[0035] (1) Crush the manganese oxide ore to a particle size of 2-10 mm, adjust its water content to 16%, mix the manganese oxide ore particles and coal powder according to the weight ratio of ore and coal at 1:0.06, and put them into the muffle furnace Roasting at a temperature of 900°C for 120 minutes, turning twice in the middle, so that the manganese oxide ore is reduced to MnO, and the roasted ore is obtained;

[0036] (2) add the concentrated sulfuric acid that mass percentage is 98% in the leaching compound tank earlier, drop into the roasted ore in the step (1) again, wherein the weight ratio 0.3:1 of the add-on of sulfuric acid and roasted ore and manganese carbonate gross weight, Roasting and leaching are carried out under high temperature and high acid conditions generated by sulfuric acid, and the leaching time is 3 hours;

[0037] (3) Acco...

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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: manganese oxide ore particles and coal powder are mixed uniformly and placed in a muffle furnace to be calcined to obtain calcined ore; the calcined ore is subjected to leaching with sulfuric acid, manganese carbonate is added for mixed leaching, and then filtering is conducted to obtain a filtrate which is leachate containing manganese sulfate; the leachate is subjected to iron removal, ammonia water is added to adjust the pH of a solution, a vulcanizing agent is added to remove impurities, filter pressing is conducted to obtain a filtrate, and the filtrate is conveyed into an electrolytic bath to be electrolyzed to obtain the electrolytic manganese metal product. The method provided by the invention reasonably utilizes the manganese ore resource, reduces the production cost, and has the characteristics of high reductive transformation rate of high-valence manganese, high leaching yield of manganese and the like.

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 roasting manganese carbonate ore and 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/10C22B1/02C22B3/08
CPCC22B1/02C22B3/08C25C1/10
Inventor 李建军韦业雄农承开盛波陆毅
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND