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A method for extracting manganese from manganese ore containing manganese silicate minerals

A technology of high silicomanganese ore and manganese silicate, applied in the direction of improving process efficiency, can solve the problems of limited improvement of manganese grade, etc., and achieve the effects of easy industrial implementation, short leaching time, and improved recycling rate

Active Publication Date: 2019-02-22
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the low-grade high-silicon-manganese ore with a Mn content of about 17% can be increased to about 21% after magnetic separation, the increase in manganese grade is limited, so that a large number of high-silicon and low-grade manganese ores with a Mn content of about 17% have not yet been obtained. use

Method used

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  • A method for extracting manganese from manganese ore containing manganese silicate minerals
  • A method for extracting manganese from manganese ore containing manganese silicate minerals
  • A method for extracting manganese from manganese ore containing manganese silicate minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 Pretreatment and leaching

[0034] The high silicon manganese ore used in this example is 1 shown in table 1 # ore sample. 1 # The manganese mineral composition of the ore sample is 64% rhodochrosite, 35% manganese silicate, and 1% iron-manganese oxide.

[0035] A. Pretreatment: Grind the ore sample into -200 mesh ore powder accounting for 90%, add concentrated sulfuric acid to the ore powder, stir and mix evenly, and obtain the pretreated product; place the pretreated product in a heat preservation device (oven, box, etc.) type furnace or tunnel kiln), heat preservation and aging.

[0036] Silicomanganese (1 # The technical conditions for pretreatment of ore samples are as follows: the excess coefficient of concentrated sulfuric acid is 2.4 to 3.0, the pretreatment temperature is 135 to 165°C, and the pretreatment time is 60 to 100 minutes. The following four pretreatment products are obtained respectively:

[0037] Ⅰ. Put in 100.0g of mineral powder,...

Embodiment 2

[0044] Embodiment 2 Pretreatment and leaching

[0045] The silico-manganese ore that this example adopts is identical with embodiment 1, promptly 1 shown in table 1 # ore sample.

[0046] Under the conditions of concentrated sulfuric acid excess coefficient 2.7, pretreatment temperature 150°C, and aging for 80 minutes, put in 600.0 mineral powder for pretreatment, and then divide the pretreated product (1155.6g) into 6 equal parts for use.

[0047] The technical conditions for the leaching of the pretreated product are as follows: the leaching water-to-mineral ratio is 2.0-3.0, the leaching temperature is 20-70°C, and the leaching time is 20-50 minutes.

[0048] Ⅰ. Take 192.6g of the pretreated product, put it into 300mL of water, leaching at 20°C for 30min, separate the solid from the liquid, and dry the wet residue at 110°C to obtain 61.53g of leaching residue, leaching liquid 1 475mL, the solution contains Mn36.1g / L, H 2 SO 4 Content 82.6 / L. The leaching slag contains...

Embodiment 3

[0051] Example 3 Adding high silicon manganese ore powder for further leaching

[0052] due to leachate 1 H 2 SO 4 The content is relatively high (70~106g / L), so it can be added by adding rhodochrosite powder or high silicomanganese powder and H in the solution 2 SO 4 reaction, using sulfuric acid in solution. The reaction using rhodochrosite powder is relatively simple, so this method uses high-silico-manganese ore powder as a raw material for neutralization reaction as an example to illustrate.

[0053] The leach solution that embodiment 2 is obtained respectively according to I-III 1 After mixing (the mixture contains Mn40.2g / L, H 2 SO 4 content of 91.8g / L), add ore powder at a temperature of 70-90°C (according to 1.3-1.5 times the theoretical acid consumption of rhodochrosite in the ore), stir for 2-3 hours, and separate solid-liquid to obtain leachate 2 And solid phase leaching products (containing unleached manganese). Leachate 2 It is used to prepare manganese...

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Abstract

The invention belongs to the field of hydrometallurgy and inorganic chemical industry, and particularly relates to a method for extracting manganese from low-grade high-silicon manganese ore containing manganese silicate minerals. The method comprises the technological steps as follows: pretreatment: adding concentrated sulfuric acid to high-silicon manganese ore powder containing 30%-50% of the manganese silicate minerals for aging treatment; leaching: a, adding a pretreated product to water for leaching and separation to obtain a manganese leachate 1 and leached residues; b, adding high-silicon manganese ore to the manganese leached liquid 1, and performing separation to obtain a manganese leached liquid 2 and a solid-phase leached product; treatment of the solid-phase leached product: mixing the solid-phase leached product with concentrated sulfuric acid for aging treatment, and performing separation to obtain a manganese leached liquid 3 and leached residues, and returning the leached liquid 3 to the step b to be used as a leaching agent for leaching high-silicon manganese ore. Under milder conditions, rhodochrosite minerals in the ore can be fully extracted, manganese silicate can be converted into manganese sulfate, the leaching rate of manganese can reach about 90%, and accordingly, the recovery rate of manganese is greatly increased, industrial implementation is easier and the method is environment-friendly.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy and inorganic chemical industry, and in particular relates to a method for extracting manganese from low-grade high-silicomanganese ore containing manganese silicate minerals. Background technique [0002] In 2013, the proven resources of manganese ore in my country were more than 1.03 billion tons, ranking sixth in the world. my country's manganese ore resource reserves are mainly concentrated in Guangxi, Hunan, Yunnan, Guizhou, Liaoning, and Chongqing. The combined manganese resource reserves of the six provinces (regions) account for 87.6% of the total manganese ore proven resource reserves in the country. Among them, manganese oxide ore accounts for about 25.0% of the total manganese ore resource reserves, manganese carbonate ore accounts for about 56.0%, and other types of manganese ore account for about 19.0%. However, my country's manganese resources are characterized by many lean ores, many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B47/00C22B1/00C22B3/04
CPCC22B1/00C22B3/04C22B47/00Y02P10/20
Inventor 刘述平廖祥文张小娅李超冯学茹曲欢欢唐湘平
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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