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Improved process of extracting manganese from dialozite

A rhodochrosite and wet process technology, applied in the field of hydrometallurgy of rhodochrosite, can solve the problems of low manganese leaching rate and the like

Inactive Publication Date: 2003-11-05
邹兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems that the leaching rate of manganese is low, the content of manganese in the slag phase is obviously high, and the amount of oxidizing agent used to remove ferrous iron is too high in the existing technology, and provides a method that greatly reduces the amount of oxidizing agent and can greatly increase the manganese content. Leaching rate of rhodochrosite wet extraction method of manganese

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: rhodochrosite 100 grams, the return liquid of electrolytic manganese (its composition is about sulfuric acid 36 grams / liter, manganese 14 grams / liter, ammonium sulfate 84 grams / liter, the same below) 815 milliliters, water 35 milliliters, the vitriol oil 15 milliliters, stir and react at 60°C for 8 hours, filter, add 1 gram of pyrolusite to the filtrate, the content of manganese dioxide in pyrolusite is 15%, stir and react for 20 minutes at room temperature, add ammonia water to adjust the pH value of the solution When the temperature is 5.0, add 0.08 g of ethyl disulfide, stir the reaction for 10 minutes, and filter. After testing, the ferrous ion concentration was 1ppm.

Embodiment 2

[0010] Embodiment 2: 100 grams of rhodochrosite, 815 milliliters of return solution of electrolytic manganese, 35 milliliters of water, 15 milliliters of concentrated sulfuric acid, stirred and reacted at 65 DEG C for 7 hours, added unslaked lime to adjust the pH value of the solution to 6.0, added 2 grams of pyrolusite, The content of manganese dioxide in the pyrolusite is 30%. At 60° C., stir and react for 25 minutes, add 0.09 g of ethyl disulfide, stir and react for 10 minutes, and filter. After testing, the ferrous ion concentration was 0.5ppm.

Embodiment 3

[0011] Embodiment 3: 100 grams of rhodochrosite, 800 milliliters of water, 31 milliliters of concentrated sulfuric acid, stirred and reacted at 70 DEG C for 6 hours, added sodium carbonate to adjust the pH value of the solution to 7.0, added 3 grams of pyrolusite, the content of manganese dioxide in pyrolusite The content is 45%. At 65° C., stir and react for 30 minutes, add 0.10 g of ethyl disulfide, stir and react for 10 minutes, and filter. After testing, the concentration of ferrous ions was 0.1ppm.

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Abstract

The present invention is improved process of extracting manganese form dialozite, and belongs to the field of wet metallurgy of dialozite. The materials include dialozite and sulfuric acid in the weight ratio of 1 to 0.3-0.8, as well as reductant in 1-18 wt% of dialozite and including sulfite, thiosulfate, SO2, iron pyrite, ascorbic acid and hydroxylamine. The process includes the following steps: filtering the acid leachate of dialozite, adding pyrolusite with MgO2 content of 15-90 wt%; ferrous compound eliminating reaction at 40-80 deg.c for over 20 min; and adding alkali, ammonia, lime, sodium carbonate, sodium bicarbonate and sodium hydroxide into the acid leachate of dialozite to regulate pH value to 5.0-8.0. The present invention has the advantages of less pyrolusite consumption,high Mg leaching rate and low Mg content in slag.

Description

technical field [0001] The invention discloses an improved method for extracting manganese from rhodochrosite by wet method, which belongs to the field of hydrometallurgy of rhodochrosite. Background technique [0002] my country is relatively rich in manganese ore resources, but with the rapid development of the manganese industry in recent years, the consumption of manganese ore has increased sharply, resulting in a sharp decrease in manganese ore available for mining, and some mines have even been exhausted. [0003] At present, the leaching of manganese in rhodochrosite generally adopts the traditional process, that is, hot dilute sulfuric acid is used as the leaching agent. The operating conditions are: the ratio of ore to acid is 1:0.5-0.6 (by weight), the leaching temperature is 60-95 ° C, and the leaching time is 3 ~8 hours. The manganese leaching rate is 80-95%, and the manganese content in the slag is as high as 5-13%. This is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08
Inventor 邹兴
Owner 邹兴
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