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Method for wet production of electrolytic manganese dioxide

An electrolytic manganese dioxide and wet process technology, applied in the electrolytic process, electrolytic components and other directions, can solve the problems affecting the quality of electrolytic manganese dioxide products, environmental pollution around the factory area, and high impurity content in the electrolyte, and achieves low production costs and improved efficiency. Purity, effect of reducing impurity content

Active Publication Date: 2015-12-30
LIUZHOU KAITONG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the process of producing electrolytic manganese dioxide in the prior art, the process method mainly used is to reduce and roast the manganese oxide ore and then extract the solution. This process method has long process flow, high production cost, and is easy to cause pollution to the surrounding environment of the factory area, etc. shortcoming
Another method is to use manganese dioxide ore and reductant pyrite to leach together to prepare liquid, which rarely adopts deep purification process to carry out deep removal of impurities on the prepared manganese sulfate solution, which causes the purity of the electrolyte to be low, making the electrolyte The high impurity content in the electrolytic manganese dioxide affects the quality of the electrolytic manganese dioxide product, and more importantly, affects

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  • Method for wet production of electrolytic manganese dioxide

Examples

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Effect test

Embodiment 1

[0019] Mix -150 mesh pyrolusite powder and pyrite powder at a mass ratio of 1:0.2, put the mixture into the leaching tank, and at the same time, add water with a concentration of 98% to form a 100g / L dilute sulfuric acid solution. The solution is added to the leaching tank at a ratio of 0.4:1 to the total mass ratio of the above two ores, and at the same time, 4 times the mass of the two ores can be added to the electrolytic waste liquid, and the temperature is kept at 90°C with constant stirring. After 3 hours, add calcium carbonate to the leaching solution for neutralization reaction to remove iron. At the same time, add 8 g of barium sulfide to each liter of leaching solution to remove heavy metal ions such as zinc and arsenic. Keep the reaction temperature at 90 ° C and control pH = 6.3 Hours later, the filtrate was obtained by solid-liquid separation and pressure filtration, and the filter residue was sent to the slag yard. The filtrate is carried out one stage of purific...

Embodiment 2

[0022] Mix -150 mesh pyrolusite powder and pyrite powder at a mass ratio of 1:0.2, put the mixture into the leaching tank, and at the same time, add water with a concentration of 98% to form a 100g / L dilute sulfuric acid solution. The solution is added to the leaching tank at a ratio of 0.4:1 to the total mass ratio of the above two ores, and at the same time, 4 times the mass of the two ores can be added to the electrolytic waste liquid, and the temperature is kept at 93°C with constant stirring. After 3.5 hours, add calcium carbonate to the leaching solution for neutralization reaction to remove iron. At the same time, add 8 g of barium sulfide to each liter of leaching solution to remove heavy metal ions such as zinc and arsenic. Keep the reaction temperature at 95 ° C and control pH = 6.3.5 Hours later, the filtrate was obtained by solid-liquid separation and pressure filtration, and the filter residue was sent to the slag yard. The filtrate is carried out one stage of pur...

Embodiment 3

[0024] Mix -150 mesh pyrolusite powder and pyrite powder at a mass ratio of 1:0.2, put the mixture into the leaching tank, and at the same time, add water with a concentration of 98% to form a 100g / L dilute sulfuric acid solution. The solution is added to the leaching tank at a ratio of 0.4:1 to the total mass ratio of the above two ores, and at the same time, 4 times the mass of the two ores can be added to the electrolytic waste solution, and the temperature is kept at 95°C with constant stirring. After 4 hours, add calcium carbonate to the leaching solution for neutralization reaction to remove iron. At the same time, add 8 g of barium sulfide to each liter of leaching solution to remove heavy metal ions such as zinc and arsenic. Keep the reaction temperature at 93°C and control pH=6.5.4 Hours later, the filtrate was obtained by solid-liquid separation and pressure filtration, and the filter residue was sent to the slag yard. The filtrate is carried out one stage of purific...

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Abstract

The invention relates to a wet process for producing electrolytic manganese dioxide. The process comprises the following steps: leaching, pretreating, purifying, standing, filtering, heating, electrolyzing and performing after-treatment. Moreover, a manganese sulfate solution is preheated before electrolysis by adopting heat-conducting oil, so that the heating temperature of the solution is controlled, the solution can be well electrolyzed, and the electrolytic efficiency is improved. Meanwhile, a diaphragm electrolytic cell in which multiple cathode regions correspond to an anode region is adopted for performing electrolysis, so that the cost can be saved, the separated manganese dioxide is prevented from being polluted, the flow of the electrolyte can be controlled through a constant flow pump, the electrolyte can be timely supplemented, and the yield of one-step electrolysis is realized to the greatest degree.

Description

technical field [0001] The invention relates to the production of electrolytic manganese dioxide, in particular to a method for wet production of electrolytic manganese dioxide. Background technique [0002] At present, there are generally two domestic and international methods for deep processing of manganese: one is to directly use the pyrometallurgy process to produce manganese alloy products for rich ores with low harmful impurities (such as phosphorus and sulfur); For manganese carbonate and partial manganese oxide ore, hydrometallurgical technology is generally used to produce a series of manganese salt products, and then the salt products are electrolyzed to produce electrolytic manganese dioxide. In the process of producing electrolytic manganese dioxide in the prior art, the process method mainly used is to reduce and roast the manganese oxide ore and then extract the solution. This process method has long process flow, high production cost, and is easy to cause pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B3/20C22B47/00C25B1/21
Inventor 林荔琍唐臻吴坚
Owner LIUZHOU KAITONG NEW MATERIAL TECH CO LTD