Method for digesting manganese in manganese oxide ore through reduction with nitrosobacteria and dissolution and dilution with dilute acid

A technology of nitrosifying bacteria and manganese dioxide ore, which is applied in photography technology, instruments, photography auxiliary technology, etc., can solve the problems of cumbersome purification and impurity removal process of leachate, increased cost, etc., and solve the problem of harmless treatment , Realize recycling and eliminate high iron/sulfur-based impurities

Inactive Publication Date: 2017-09-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the traditional acidophilic sulfur / iron oxidizing bacteria biometallurgy technology increases the concentration of impurities in iron / sulfur source products when leaching low-grade manganese dioxide ore, which leads to cumbersome purification and impurity removal processes and increased costs for subsequent extractions A new biometallurgical method for leaching manganese in manganese dioxide ore based on nitrosative bacteria oxidation of high ammonia nitrogen wastewater / waste liquid by biological reduction-dilute acid dissolution coupling process

Method used

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  • Method for digesting manganese in manganese oxide ore through reduction with nitrosobacteria and dissolution and dilution with dilute acid

Examples

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Effect test

Embodiment example 1

[0022] Nitrosifying Bacteria Biometallurgy Using Waste Electrolyzed Manganese Anolyte as Nitrogen Source and Energy

[0023] (1) Low-grade granular manganese dioxide ore is dried at 105°C, crushed, and ground, and then passed through a 250-mesh sieve to obtain manganese dioxide ore powder with a particle size of less than 58 microns. Collect the spent electrolytic manganese anolyte and let it stand at room temperature for 12 hours, then take the supernatant for later use.

[0024] (2) The cultivation of nitrosative bacteria was carried out in a 250ml Erlenmeyer flask. Based on 100ml of culture medium, 75ml of inorganic salt culture medium (disodium hydrogen phosphate 0.25g / L, dipotassium hydrogen phosphate 0.75g / L, magnesium sulfate heptahydrate 0.03g / L, calcium carbonate 5g / L), 5ml electrolytic manganese waste Anolyte supernatant (ammonia nitrogen 20.38g / L), 20ml nitrosative bacteria flora seed solution. With 2mol / L NaOH solution or H 2 SO 4 The solution adjusted the init...

Embodiment example 2

[0027] Biometallurgy of Nitrosifying Bacteria Using Waste Ammonia as Nitrogen Source and Energy

[0028] (1) Low-grade granular manganese dioxide ore is dried at 105°C, crushed, and ground, and then passed through a 250-mesh sieve to obtain manganese dioxide ore powder with a particle size of less than 58 microns. Collect coking plant waste ammonia water and use 0.5mol / L H 2 SO 4 The pH of the solution was adjusted to 6.0.

[0029] (2) The cultivation of nitrosative bacteria was carried out in a 250ml Erlenmeyer flask. Based on 100ml of culture medium, 70ml of inorganic salt culture medium (disodium hydrogen phosphate 0.25g / L, dipotassium hydrogen phosphate 0.75g / L, magnesium sulfate heptahydrate 0.03g / L, manganese sulfate tetrahydrate 0.01g / L, calcium carbonate 5g / L), 10ml waste ammonia water (ammonia nitrogen concentration 7.0g / L), 20ml nitrosative bacteria flora seed solution. With 2mol / L NaOH solution or H 2 SO 4 The solution adjusted the initial pH of the culture me...

example example 3

[0032] Nitrosifying Bacteria Biometallurgy Using Ammonium Bicarbonate Waste Liquid as Nitrogen Source and Energy

[0033] (1) Low-grade granular manganese dioxide ore is dried at 105°C, crushed, and ground, and then passed through a 250-mesh sieve to obtain manganese dioxide ore powder with a particle size of less than 58 microns. Collect the ammonium bicarbonate waste liquid from the fertilizer plant for future use.

[0034] (2) The cultivation of nitrosative bacteria was carried out in a 250ml Erlenmeyer flask. Based on 100ml of culture medium, 40ml of inorganic salt culture medium (disodium hydrogen phosphate 0.25g / L, dipotassium hydrogen phosphate 0.75g / L, magnesium sulfate heptahydrate 0.03g / L, manganese sulfate tetrahydrate 0.01g / L, calcium carbonate 5g / L), 40ml ammonium bicarbonate waste liquid (ammonia nitrogen concentration 1.2g / L), 20ml nitrosative bacteria flora seed liquid. With 2mol / L NaOH solution or H 2 SO 4 The solution adjusted the initial pH of the cultur...

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Abstract

The invention relates to a method for digesting manganese in manganese oxide ore through reduction with nitrosobacteria and dissolution and dilution with dilute acid, and belongs to the technical field of novel biological metallurgy techniques for recovery of manganese resources in manganese ore. According to the method, low-grade manganese dioxide ore is reduced through a strong reducer hydroxylamine-like substance, namely an intermediate product generated while high ammonia nitrogen waste water/liquid is oxidized with nitrosobacteria, and then bivalent manganese is dissolved and diluted in a dilute acid solution so that a manganese sulfate saline solution for electrolytic manganese metal production can be obtained. Mn4+ in the manganese dioxide ore is reduced into Mn2+ through the high reduction activity intermediate product generated during aerobic oxidation of the high ammonia nitrogen waste water/liquid through the nitrosobacteria as well as related inoculants and enzyme systems, and the manganese sulfate saline stock solution for electrolytic manganese production is obtained through acidolysis with dilute acid. The novel bioleaching technique not only completely eliminates the problem of high fe-based/sulfenyl impurities in a traditional sulfur/iron-oxidizing bacterium bioleaching solution, but also achieves innocent treatment of the high ammonia nitrogen waste liquid. The novel microorganism hydrometallurgy technique has the beneficial effects of being simple, convenient to implement, environmentally friendly and capable of achieving resource recycling.

Description

technical field [0001] The invention relates to an intermediate product produced in the process of oxidizing high-ammonia-nitrogen wastewater / waste liquid by nitrosating bacteria—a strong reducing agent such as hydroxylamine to reduce low-grade manganese dioxide ore, and then dissolve divalent manganese in dilute acid solution to obtain usable The manganese sulfate salt solution produced by electrolytic metal manganese belongs to the new biometallurgy technology field of manganese resource recovery in manganese ore. Background technique [0002] Electrolytic manganese is widely used in many fields such as electronics industry, metallurgical industry, iron and steel industry, nonferrous industry, chemical industry, aerospace industry, and welding rod industry. The main raw materials for electrolytic manganese production are manganese oxide ore and manganese carbonate ore, and the production process of "leaching-purification-electrolysis" is usually adopted. Manganese carbona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B47/00C25C1/10
CPCC22B3/18C22B47/00C25C1/10
Inventor 辛宝平张永涛王佳但智刚段宁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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