Method for increasing manganese leaching rate in low-grade manganese ore

A low-grade manganese ore and leaching rate technology, applied in the field of metallurgy, can solve the problems of large output of manganese slag and high energy consumption of electrolysis, and achieve the effects of improving leaching, reducing pollution and improving comprehensive utilization rate.

Active Publication Date: 2020-01-14
广西大新汇元新能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its lower grade and more harmful impurities make the output of manganese slag huge, and the energy consumption of electrolysis is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for improving the manganese leaching rate in low-grade manganese ore, comprising the following steps:

[0024] (1) During the ore leaching process, the weight ratio of low-grade manganese ore to liquid is 0.95:5, the weight ratio of sulfuric acid to low-grade manganese ore is 2.9:1, and the input amount of surfactant is 19ppm. Under the condition of ℃, react for 4.8h, stand still for 15min, and obtain the manganese ore leaching solution, the mass percentage of +2 valent metal manganese in the described low-grade manganese ore is 19.00%, the mass percentage of +4 valent metal manganese is 0.45%, and the surfactant Be OP-10, described sulfuric acid is the concentrated sulfuric acid that mass percent is 96.5%;

[0025] (2) Use manganese powder to oxidize and remove iron from the manganese ore leaching solution, adjust the pH of the manganese ore leaching solution to 6.5 with Shuangfei powder, and perform the first pressure filtration under the condition of 0.05MPa...

Embodiment 2

[0031] A method for improving the manganese leaching rate in low-grade manganese ore, comprising the following steps:

[0032] (1) During the ore leaching process, the weight ratio of low-grade manganese ore to liquid is 1.05:5, the weight ratio of sulfuric acid to low-grade manganese ore is 3.1:1, and the input amount of surfactant is 21ppm. Under the condition of ℃, react for 5.2h, stand still for 15min, and obtain the manganese ore leaching solution, the mass percent of +2 valent metal manganese in the described low-grade manganese ore is 19.10%, the mass percent of +4 valent metal manganese is 0.55%, and the surfactant Be OP-10, described sulfuric acid is the concentrated sulfuric acid that mass percent is 98.5%;

[0033] (2) Use manganese powder to oxidize and remove iron from the manganese ore leaching solution, adjust the pH of the manganese ore leaching solution to 7.0 with Shuangfei powder, and perform the first pressure filtration at a pressure of 0.15 MPa to obtain ...

Embodiment 3

[0039] A method for improving the manganese leaching rate in low-grade manganese ore, comprising the following steps:

[0040] (1) During the ore leaching process, the weight ratio of low-grade manganese ore to liquid is 1.02:5, the weight ratio of sulfuric acid to low-grade manganese ore is 3:1, and the input amount of surfactant is 20ppm. Under the condition of ℃, react for 5h, let it stand for 15min, and obtain the manganese ore leachate, the mass percentage of +2 metal manganese in the low-grade manganese ore is 19.05%, the mass percentage of +4 metal manganese is 0.50%, and the surfactant is OP-10, described sulfuric acid is the concentrated sulfuric acid that mass percent is 97.5%;

[0041] (2) Use manganese powder to oxidize and remove iron from the manganese ore leaching solution, adjust the pH of the manganese ore leaching solution to 6.7 with Shuangfei powder, and perform the first pressure filtration under the condition of 0.10 MPa to obtain the first pressure filtr...

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PUM

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Abstract

The invention provides a method for increasing the manganese leaching rate in low-grade manganese ore. In the low-grade manganese ore leaching process, a proper amount of surfactant is added, the surface activity of mineral particles is improved, the adsorption effect of the ore particles on hydrogen ions is improved, oily organic matter is effectively removed, and meanwhile, the manganese leaching rate is improved. In the filter pressing process of a manganese ore leaching solution, the surfactant is continuously filtered away, so that the surface tension of the manganese ore leaching solution is continuously decreased, and the current efficiency of the manganese ore leaching solution tends to be decreased after rising. In the low-grade manganese ore electrolysis process, a proper amountof surfactant is added, so that the surface tension value of the manganese ore leaching solution is optimal, and the current efficiency of electrolytic manganese is remarkably improved. The redox potential of electrolyte is reasonably controlled, so that the current efficiency of the solution is highest. Selenium dioxide with a certain concentration is added into the electrolyte during electrolysis so that occurrence of hydrogen evolution reaction can be inhibited, the current efficiency of the electrolytic manganese process can be remarkably improved, the energy consumption of the electrolytic manganese is low, and the manganese leaching rate is high.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for increasing the leaching rate of manganese in low-grade manganese ore. Background technique [0002] At present, my country has become the world's largest utilization country of manganese resources. The resource potential of domestic high-quality manganese ore reaches 200 million tons. The manganese ore resources are mainly complex low-grade manganese carbonate ore. Domestic electrolytic manganese enterprises generally use manganese carbonate ore as raw material for manganese metal production. The advantage is that the ore leaching process is simple, and manganese ore can be leached directly with sulfuric acid. However, its lower grade and more harmful impurities make the output of manganese slag huge, and the energy consumption of electrolysis is relatively high. Manganese ore in my country is dominated by sedimentary manganese carbonate, followed by manganese oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B47/00C25C1/10
CPCC22B3/08C22B47/00C25C1/10
Inventor 郭爱民明宪权黄冠汉谢彦黄炳龙刘登祥卢国贤何溯结
Owner 广西大新汇元新能源科技有限责任公司
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