Method for extracting high-valence manganese from manganese carbonate ore

A technology of manganese carbonate ore and high-value manganese is applied in the field of reducing high-value manganese, which can solve the problems of high reaction temperature, increased acid consumption, difficulty in hydrolysis of biomass powder into sugar, etc. No temperature gradient effect

Inactive Publication Date: 2007-11-14
CHONGQING UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In the method in which plant biomass such as sugarcane molasses, bran, and rice husk are used as reducing agents, the raw materials are cheap and easy to obtain, but it is difficult to hydrolyze biomass powder into sugar, which requires higher reaction temperature and acid The problem of increased consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: get manganese carbonate ore (being rhodochrosite, manganese content 20.6%) 10g, be pulverized to 100 orders, add 200g water and be modulated into ore pulp; Add concentrated sulfuric acid (mass percentage composition 60%) 150g and glucose 1g to ore pulp again , under 500W microwave radiation, stirring and reacting for 10 minutes, and controlling the leaching temperature to 50°C, the manganese sulfate leaching solution of high-valent manganese was obtained, and the leaching rate of manganese was measured to be 92.1%.

Embodiment 2

[0013] Embodiment 2: get manganese carbonate ore (being rhodochrosite) 100g, be pulverized to 120 orders, add 1000g water and be modulated into ore pulp; Add concentrated sulfuric acid (mass percentage composition 60%) 1000g and soluble starch 10g toward ore pulp again, at 600W Under microwave radiation, stir and react for 8 minutes, control the leaching temperature at 60°C, and obtain a manganese sulfate leaching solution of high-valent manganese; the leaching rate of manganese is measured to be 98.7%.

Embodiment 3

[0014] Embodiment 3: get manganese carbonate ore (being rhodochrosite) 15g, be crushed to 200 orders, add 210g water and be modulated into ore pulp; Add concentrated sulfuric acid (60% by weight) 200g and sawdust 1.3g toward ore pulp again, in 700W microwave Under radiation, stirring and reacting for 8 minutes, controlling the leaching temperature to 60°C, the manganese sulfate leaching solution was obtained, and the leaching rate of manganese was measured to be 99.2%.

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PUM

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Abstract

This invention has provided one kind of method to leach high price manganese from manganese carbonateore, which belongs to the hydrometallurgy domain. It takes the glucose or the plant biomass and sulfuric acid as reducing agent of high pricemanganese in manganese carbonate ore, adopting microwave radiation glucose to promote high price manganese to revert, the concrete step includes: Takes 1 copy 100-200 sieve manganese carbonateore, add 10 -20 copy water to modulate the pulp; Again add 60% density sulfuric acid to pulp, the load ratio of mineral powder and sulfuric acid is 1: 6 -9; Simultaneously, add glucose or plant biomass, the load ratio of mineral powder and glucose or plant biomass is 10 -15: 1, stir evenly; radiate under 500 -1000W microwave, stir and respond for 4-10min, leach temperature is controlled at 50degree C-60 degree C, then get lixivium by filtering. This invention has the merits of lower reaction temperature, reducing acid consume and reduce leaching time of the manganese ore, high thermal using and respond rapidly.

Description

technical field [0001] The invention relates to a method for reducing high-valent manganese when manganese ore is leached, and belongs to the field of hydrometallurgy. Background technique [0002] With the rapid economic growth, China has become the world's largest producer, exporter and consumer of electrolytic manganese. Although domestic reserves of manganese ore available for industrial use have reached 300 million tons, more than 80% of them are poor manganese ore, and the average manganese content of the ore is only about 20%. Generally, the chemical processing technology of manganese ore is divided into two types: acid method and alkali method, and the process route is mainly determined according to the existence form of manganese in the ore and the types of products produced. For example, if the valence state of manganese in manganese ore exists in the positive divalent state, the acid method is often used; if it exists in the positive tetravalent state, the alkali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B47/00
Inventor 陶长元曹渊刘作华杜军唐金晶
Owner CHONGQING UNIV
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