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Production method for manganese sulfate by using biological cellulose and low-grade manganese ores

A bio-cellulose, low-grade manganese ore technology, applied in manganese sulfate and other directions, can solve the problems of slow reaction speed, large energy consumption, poor production conditions, etc., and achieve the effects of low production cost, no dust pollution, and stable reaction.

Inactive Publication Date: 2012-04-25
陈昆先 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal reduction roasting-sulfuric acid leaching has a history of nearly one hundred years, and is a traditional and practical method, but due to its large energy (coal) consumption and serious environmental pollution (SO 2 , dust) and other factors have basically been eliminated
Two-mine reduction roasting-leaching method Although this method is mature, its obvious disadvantages are high equipment investment, complicated reaction control, poor production conditions, serious pollution, etc., and it has been gradually eliminated.
The main advantages of the direct reduction-leaching method are small equipment investment, convenient operation, and light environmental pollution. However, at the current technical level, the reaction speed is slow (the leaching reaction time is generally more than 8 hours), and the conversion rate of pyrolusite and reducing agent Not advanced is its main disadvantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 1000kg of pyrolusite from a certain company in Hunan, and its chemical composition analysis is (in terms of mass fraction): Mn: 18.52, Fe 2 o 3 : 8.25, CaO: 16.52, Cu: 0.003, P: 0.022, Mg: 1.58. Get 250kg of local rice straw, its component is (by mass fraction): H 2 O: 6.23, volatile matter: 72.93, ash content: 8.21, fixed carbon: 15.32. Grind the pyrolusite to 150 mesh with a Raymond mill, and crush the straw to 30 mesh with a pulverizer; put it into a mixer for mixing, and then transfer it to a simple reaction tank built with anti-corrosion materials and cement for aging reaction 30min.

[0022] After the aging reaction is completed, the reactants are cooled by spraying with water to prevent secondary oxidation of the product MnO. join w(H 2 SO 4 )=15% dilute sulfuric acid, the addition of sulfuric acid is n(Mn 2+ ):n(H 2 SO 4 )=1:1.1, stirring constantly, leaching reaction for 35min.

[0023] After the above leaching reaction is completed, add industria...

Embodiment 2

[0026] Get 1000kg of manganese tailings from a company in Laibin City, Guangxi Zhuang Autonomous Region, and its chemical composition analysis is (in terms of mass fraction): Mn: 13.28, Fe 2 o 3 : 8.9, CaO: 8.56, Al 2 o 3 : 5.0, Cu: 420ppm, Zn: 1000ppm, Ni: 3000. Take 200kg of sawdust produced by local timber, and then add 5kg of industrial sodium nitrate. Grind the pyrolusite to 100 mesh with a Raymond mill, and crush the straw to 50 mesh with a pulverizer; put it into a mixer for mixing, and then transfer it to a reactor for aging reaction for 45 minutes.

[0027] After the aging reaction is completed, start the reactor jacket cooling water to cool the reactants to prevent the secondary oxidation of the product MnO. join w(H 2 SO 4 )=25% dilute sulfuric acid, the addition of sulfuric acid is n(Mn 2+ ):n(H 2 SO 4 )=1:1.05, stirring constantly, leaching reaction for 125min.

[0028] After the above leaching reaction is completed, industrial sodium hydroxide is added ...

Embodiment 3

[0031] Get 1000kg of manganese-poor tailings from a company in Jingxi County, Guangxi Zhuang Autonomous Region, and its chemical composition analysis is (in terms of mass fraction): Mn: 15.2, Fe 2 o 3: 6.7, CaO: 0.5, Cu: 620ppm, Zn: 870ppm, Ni: 4000. Take 350kg of bagasse produced by a local sugar brewing enterprise. Grind the pyrolusite to 120 mesh with a Raymond mill, and crush the straw to 30 mesh with a pulverizer; put it into a mixer for mixing, and then transfer it to a reactor for aging reaction for 35 minutes.

[0032] After the aging reaction is completed, start the reactor jacket cooling water to cool the reactants to prevent the secondary oxidation of the product MnO. join w(H 2 SO 4 )=35% dilute sulfuric acid, the addition of sulfuric acid is n(Mn 2+ ):n(H 2 SO 4 )=1:1.25, stirring continuously, leaching reaction for 100min.

[0033] After the above leaching reaction is completed, industrial rhodochrosite powder is added to neutralize the leaching solution ...

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Abstract

The invention discloses a production method for manganese sulfate by using low-grade manganese ores. According to the method, manganese sulfate with high purity can be produced by using waste low-grade manganese ores with manganese content of 10% to 20%, manganese tailing or manganese-containing solid waste residue. The method comprises the steps of preparation of raw materials, a slaking reaction, a leaching reaction, neutralization and purification of leachate, etc. According to the invention, production of manganese sulfate is not restricted by the grade of manganese ores, and low-grade manganese oxide ores with a grade greater than 10%, manganese tailing or manganese-containing solid waste residue can be fully utilized; produced manganese sulfate has high yield and high purity and is a very important industrial fundamental product; almost no external heat supply is needed, low energy consumption is achieved, production cost is low, it does not need to turn over and mix materials in the process of the reactions, the reactions are smooth, no toxic gas is generated, and no environmental pollution is produced; discharge of three wastes (waste gas, waste water and industrial residue) reaches national discharge standards for environmental protection, and there is no dust pollution in a workshop.

Description

technical field [0001] The invention relates to a method for producing manganese sulfate. Tebi is a method for producing manganese sulfate by using biological cellulose and low-grade manganese ore. The method can use the discarded low-grade manganese ore or tailing ore and various low manganese slags to produce manganese sulfate. Background technique [0002] my country's manganese ore has economically recoverable reserves of 127 million tons, with an average grade of 22%, equivalent to 27.94 million tons of manganese metal. Currently, 10 kg of manganese is required to produce 1 ton of steel. my country produced 700 million tons of steel in 2010 and needed 7 million tons of manganese. According to this calculation, my country's manganese ore reserves are only enough for 5 years. Manganese ore containing more than 16% manganese can be exploited in large quantities and has economic value. Manganese ore reserves containing more than 16% manganese are economically recoverable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
Inventor 李灿华陈昆先
Owner 陈昆先
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