Method of recovering manganese sulfate from low-grade manganese carbonate and manganese oxide

A technology of manganese oxide ore and manganese carbonate, which is applied in the direction of manganate/permanganate, etc., can solve the problems of fine particle size of manganese minerals, poor economic feasibility, and high cost of beneficiation, so as to achieve simple production process, prevent environmental pollution, and improve The effect of utilization

Inactive Publication Date: 2005-08-24

桂林市孟泰矿产技术开发有限责任公司 +2

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AI-Extracted Technical Summary

Problems solved by technology

Due to the low grade of poor manganese ore in my country, complex ore structure, and fine particle size of manganese minerals, the effect of mechanical beneficiation is not ideal, and the increase in concentrate grade is not large.

According to the test and actual production results of some mines, the concentrate grade often does not reach 30%, and the cost of mineral pr...

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Abstract

A process for recovering mangnese sulfate from low-grade mangnese carbonate (or oxide) ore includes such steps as grinding, mixing with pyrite or ferrous sulfate, adding concentrated sulfuric acid, stirring, calcining, extracting in water, removing impurities from the liquid extract, evaporating and crystallizing to obtain MnSO4.H2O.

Application Domain

Manganates/permanganates

Technology Topic

Manganese oxideSulfur dioxide +10

Examples

Experimental program(3)

Example Embodiment

[0013] Example 1:

[0014] 1) Grind the manganese carbonate concentrate (manganese content of about 21%) from Guangxi Daxin Manganese Mine to below -100 mesh;

[0015] 2) Weigh 50 grams of finely ground manganese carbonate concentrate and 5 grams of FeSO 4 ·H 2 O Grind and mix evenly in a mortar to obtain a mixture;

[0016] 3) Add 30 grams of concentrated sulfuric acid with a weight concentration of 98% to the above mixture;

[0017] 4) Put the uniformly mixed materials into a 100ml quartz sintering boat and roast them in a tube furnace at 500°C for 1 hour; pass the sulfur dioxide gas generated during the roasting process into the leaching solution of low-grade manganese oxide ore, and leaching low-grade at a temperature of 50°C The leaching rate of manganese in manganese oxide ore to manganese oxide ore can reach more than 98%;

[0018] 5) The calcine obtained by sulfation was leached with 200ml of water at 60°C under stirring for 20min to obtain a manganese sulfate leaching solution with pH=6~7; washed 3 times with a small amount (20ml) of water, and analyzed the concentration of manganese and cobalt in the filtrate Calculate the recovery rate of manganese is about 95%, and the leaching rate of cobalt is about 82%;

[0019] 6) Filtering and mixing the manganese oxide leaching solution and manganese sulfate leaching solution that have been passed through sulfur dioxide to obtain a mixed solution;

[0020] 7) The mixed solution is treated with barium sulfide for impurity removal to obtain a purified solution; the weight ratio of the added barium sulfide to manganese carbonate or manganese oxide ore is generally 0.5:100;

[0021] 8) Evaporate and concentrate the purified liquid and crystallize at 80°C to obtain MnSO 4 ·H 2 O.

Example Embodiment

[0022] Example 2:

[0023] 1) Grind the raw manganese oxide ore in northern Guangxi (with a manganese content of about 24%) to below -100 mesh;

[0024] 2) Weigh 50 grams of finely ground manganese oxide ore and 2 grams of pyrite, grind and mix them evenly in a mortar to obtain a mixture;

[0025] 3) Then add 28 grams of concentrated sulfuric acid with a weight concentration of 80% to the above mixture;

[0026] 4) Put the uniformly mixed materials into a 100ml quartz sintering boat and roast them in a tubular furnace at 600°C for 40 minutes; pass the sulfur dioxide gas generated during the roasting process into the leaching solution of low-grade manganese oxide ore, and leaching at a temperature of 60°C is low The manganese in the high-grade manganese oxide ore has a leaching rate of over 96%;

[0027] 5) The calcine obtained by sulfation was leached with 200ml of water at 90℃ under stirring for 20min to obtain a manganese sulfate leaching solution with PH=6~7; washed 3 times with 20ml of water, analyzed the concentration of manganese and cobalt in the filtrate, and calculated the manganese The recovery rate is about 96%, and the leaching rate of cobalt is about 86%;

[0028] 6) Filtering and mixing the manganese oxide leaching solution and manganese sulfate leaching solution that have been passed through sulfur dioxide to obtain a mixed solution;

[0029] 7) The mixed solution is treated with barium sulfide for impurity removal to obtain a purified solution; the weight ratio of the added barium sulfide to manganese carbonate or manganese oxide ore is generally 0.5:100;

[0030] 8) Evaporate and concentrate the purified liquid, crystallize at 100°C to obtain MnSO 4 ·H 2 O.

Example Embodiment

[0031] Example 3:

[0032] 1) Grind the manganese carbonate concentrate of Guangxi Daxin Manganese Mine (manganese content is about 20%) to below -100 mesh;

[0033] 2) Weigh 50 grams of finely ground manganese carbonate concentrate and 3 grams of pyrite, grind and mix evenly in a mortar to obtain a mixture;

[0034] 3) Add 32 grams of concentrated sulfuric acid with a weight concentration of 98% to the above mixture;

[0035] 4) Put the uniformly mixed materials into a 100ml quartz sintering boat and roast them in a tube furnace at 550°C for 30 minutes;

[0036]5) The calcine obtained by sulfation was leached with 200ml of water at 60℃ for 10min under stirring to obtain a manganese sulfate leaching solution with pH=6~7; washed 3 times with 20ml of water, analyzed the concentration of manganese and cobalt in the filtrate, and calculated the manganese The recovery rate is about 96%, and the leaching rate of cobalt is about 84%;

[0037] 6) Barium sulfide is added to the manganese sulfate leaching solution for impurity removal treatment to obtain a purified solution; the weight ratio of the added barium sulfide to manganese carbonate or manganese oxide ore is generally 0.3:100;

[0038] 7) Evaporate and concentrate the purified liquid and crystallize at 80℃ to obtain MnSO 4 ·H 2 O.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

High recovery rate
Simple production process

Method of recovering manganese sulfate from low-grade manganese carbonate and manganese oxide

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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