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Method for preparing electrolytic manganese metal by using high-iron and high-phosphor manganese ores

A technology for high iron and high phosphorus manganese ore and electrolytic manganese metal, which is applied in the directions of photography, instruments, photography auxiliary technology, etc., can solve the problems of ore increasing the burden of solution purification, pollution of soil and groundwater resources, and ineffective utilization of manganese ore. , to reduce the edge effect, improve the extraction rate, and prevent impurities from entering the solution.

Inactive Publication Date: 2013-07-10
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the perennial disorderly mining of manganese carbonate ore and high-grade manganese oxide ore, there are fewer and fewer manganese ore resources in China that can meet the production of electrolytic manganese metal, which makes many electrolytic metal manganese enterprises fall into the dilemma of hard to find resources. Due to the traditional electrolytic manganese metal The production method uses a large amount of high-concentration sulfuric acid, so that most of the harmful impurities in the manganese ore enter the electrolyte, which seriously affects the quality of the product. At the same time, the manganese leaching slag is acidic and cannot be discharged. Great pollution of soil and groundwater resources
[0004] High-iron and high-phosphorus manganese ore is a typical complex manganese ore with high impurity content and difficult treatment. On the one hand, it cannot be produced by fire method because of its large amount of phosphorus. On the other hand, when this manganese ore is used as raw material, When the existing hydrometallurgical technology produces electrolytic manganese and other products, the ore contains a large amount of iron impurities, which increases the burden of solution purification and affects the product quality. Therefore, with the existing manganese ore hydrometallurgical technology, manganese processing enterprises are unwilling Using this type of ore raw materials, while this type of manganese ore can not be effectively utilized

Method used

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  • Method for preparing electrolytic manganese metal by using high-iron and high-phosphor manganese ores

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Experimental program
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Effect test

Embodiment 1

[0034]Put the high-iron high-phosphorus manganese ore and pyrite into the ball mill respectively. The speed of the ball mill is 350r / min, and the ball milling time is 2 hours. Because the ground ore powder is mixed and roasted in a self-made furnace with false bottom ventilation , so if the particle size of the ground ore powder is too large, the contact area of ​​the two ores will be reduced and cannot be fully mixed. If the particle size of the ground ore powder is too small, it will be taken away by the air flow and the roasting cannot be completed. The obtained mineral powder has a particle size of 150 mesh. The high-iron, high-phosphorus manganese ore powder and pyrite powder were mixed at a molar ratio of 1:1.5, and roasted at a constant temperature using a self-made blast furnace with a false bottom as the roasting equipment. The roasting temperature was 560°C and the roasting time was 3 hours. Add the roasted clinker into clear water to leaching the ore in a mass ratio...

Embodiment 2

[0037] Put the high-iron high-phosphorus manganese ore and pyrite into a ball mill respectively, the rotating speed of the ball mill is 350r / min, the ball milling time is 2 hours, and sieve to obtain mineral powder with a particle size of 200 mesh. The high-iron, high-phosphorus manganese ore powder and pyrite powder were mixed at a molar ratio of 1:1.8, and roasted at a constant temperature using a self-made blast furnace with a false bottom as the roasting equipment. The roasting temperature was 600°C and the roasting time was 3.5 hours. Add the roasted clinker to clean water to leaching the ore in a mass ratio of 1:6, and keep stirring. After 3.5 hours of leaching, the leach solution was analyzed for all elements. The leach solution was manganese sulfate leach solution containing impurities, and the leaching rate of manganese was 89.3%. Then, the manganese sulfate leach solution was pretreated, and 9 g of barium sulfide was added per liter of leach solution, and continued to...

Embodiment 3

[0039] Put the high-iron high-phosphorus manganese ore and pyrite into a ball mill respectively, the rotating speed of the ball mill is 350r / min, the ball milling time is 2 hours, and sieve to obtain mineral powder with a particle size of 250 mesh. The high-iron, high-phosphorus manganese ore powder and pyrite powder were mixed at a molar ratio of 1:2.5, and roasted at a constant temperature using a self-made blast furnace with a false bottom as the roasting equipment. The roasting temperature was 620°C and the roasting time was 4 hours. Add the roasted clinker into clear water to leaching the ore in a mass ratio of 1:7, and keep stirring. After 4 hours of leaching, the leach solution was analyzed for all elements. The leach solution was manganese sulfate leach solution containing impurities, and the leaching rate of manganese was 87.7%. Then, the manganese sulfate leach solution was pretreated, and 10 g of barium sulfide was added per liter of leach solution, and continued to ...

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Abstract

The invention relates to a method for preparing electrolytic manganese metal by using high-iron and high-phosphor manganese ores. The method comprises the following steps of: respectively carrying out ball-milling on high-iron and high-phosphor manganese ores and iron pyrites to form powders, mixing the powders in proportion and roasting in a self-manufactured roasting device, leaching the mixture subjected to sulfating roasting by taking water as a leaching agent to obtain a manganese sulfate solution, removing impurities from the manganese sulfate solution to obtain a manganese sulfate electrolyte, adding an electrolysis additive to the manganese sulfate electrolyte, simultaneously adding ammonium salt serving as a buffering agent to the solution, putting the electrolyte into an electrolytic cell, switching on direct current and maintaining constant temperature so that an electroextraction effect is generated to separate out the manganese metal on a cathode, purifying, washing, drying and peeling the separated manganese metal, thus obtaining the electrolytic manganese metal product. The method is short in technological process, hardly pollutes the environment and and is suitable for development and application of low-grade high-iron and high-phosphor manganese ores.

Description

technical field [0001] The invention relates to a method for preparing electrolytic manganese metal, in particular to a method for preparing electrolytic manganese metal by utilizing high-iron and high-phosphorus manganese ore. [0002] Background technique [0003] Manganese is an important strategic resource, and manganese products are widely used in the fields of steel, electronics, light industry, chemical industry, agriculture and national defense. Electrolytic manganese metal is an important manganese deep-processing product. At present, electrolytic manganese metal mainly adopts two production processes: one is to use manganese carbonate as raw material, and adopt sulfuric acid leaching-electrolyte preparation-electrolysis process to produce electrolytic metal manganese products; Taste manganese oxide ore as raw material, and use reduction roasting-sulfuric acid leaching-electrolyte preparation-electrolysis process to produce electrolytic manganese metal products. D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/10C22B1/06C22B3/04
Inventor 袁明亮李康宋聪明宪权詹海青黎贵亮陈南雄黄冠汉邓永光黎建新
Owner CENT SOUTH UNIV
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