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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 processing is high, and the economic feasibility is poor.
This kind of result is still for those ores that are considered to be easy to be separated by mechanical beneficiation, and the enrichment and recovery effect of difficult ore is even less ideal. Therefore, there are great limitations in the recovery of manganese by using the existing mechanical beneficiation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0015] 2) take by weighing 50 grams of manganese carbonate concentrate and 5 grams of FeSO after grinding 4 ·H 2 O grind and mix uniformly in a mortar to obtain a mixed material;

[0016] 3) adding 30 grams of weight concentration to the above-mentioned mixed material is 98% concentrated sulfuric acid;

[0017] 4) Put the uniformly mixed material into a 100ml quartz calciner and roast it 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 leach low-grade manganese oxide ore at a temperature of 50°C Manganese in manganese oxide ore, the leaching rate of manganese in manganese oxide ore can reach more than 98%;

[0018] 5) The calcined sand obtained by sulfation was stirred and leached with 200ml of water at 60°C for 20m...

Embodiment 2

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

[0024] 2) Weighing 50 grams of ground manganese oxide raw ore and 2 grams of pyrite, grinding and mixing in a mortar to obtain a mixed material;

[0025] 3) adding 28 grams of weight concentration to the above-mentioned mixed material is 80% concentrated sulfuric acid;

[0026] 4) Put the uniformly mixed material into a 100ml quartz burning boat and roast it in a tube furnace at 600°C for 40 minutes; and pass the sulfur dioxide gas generated during the roasting process into the leaching solution of low-grade manganese oxide ore, and leach low-grade manganese oxide ore at a temperature of 60°C. Manganese in manganese oxide ore, the leaching rate of manganese in manganese oxide ore can reach more than 96%;

[0027] 5) The calcined sand obtained by sulfation was stirred and leached with 200ml of water at 90°C for 20min to obtain a manganese sulfate leaching soluti...

Embodiment 3

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

[0033] 2) Weighing 50 grams of finely ground manganese carbonate concentrate and 3 grams of pyrite and grinding and mixing in a mortar to obtain a mixed material;

[0034] 3) adding 32 grams of weight concentration to the above-mentioned mixed material is 98% concentrated sulfuric acid;

[0035] 4) Put the uniformly mixed material into a 100ml quartz calciner and bake it in a tube furnace at 550°C for 30 minutes;

[0036]5) The calcined sand obtained by sulfation was stirred and leached with 200ml of water at 60°C for 10 minutes to obtain a manganese sulfate leaching solution with a pH of 6 to 7; washed with 20ml of water for 3 times, and the concentration of manganese and cobalt in the filtrate was analyzed to calculate manganese The recovery rate is about 96%, and the cobalt leaching rate is about 84%;

[0037] 6) adding barium sulfi...

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PUM

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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.

Description

(1) Technical field: [0001] The invention relates to a method for recovering manganese sulfate from manganese ore, in particular to a method for recovering manganese sulfate from low-grade manganese carbonate and manganese oxide ore. (two) background technology: [0002] Manganese exists in large quantities in the earth's crust, with an average content of about 0.1%. Its content is the 15th among known elements, and it is second only to iron among heavy metals. Manganese has a wide range of uses, involving almost every aspect of human production and life. In the iron and steel industry, manganese is the second most important metal element after iron. Almost 90% of manganese is consumed in the iron and steel industry. my country's cumulative proven manganese ore reserves are 640 million tons, and manganese metal reserves are 40 million tons, ranking fourth in the world after South Africa, Ukraine and Gabon, and the distribution is relatively concentrated. 90% of manganese ore...

Claims

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Application Information

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IPC IPC(8): C01G45/12
Inventor 朱国才李赋屏
Owner 桂林市孟泰矿产技术开发有限责任公司
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