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Method for extracting vanadium from high-silicon stone coal with MnO2 collaborative heaping process

A high-silicon and stone-coal technology, applied in the field of vanadium extraction by hydrometallurgy, can solve the problems of large investment, low leaching rate, and high energy consumption, and achieve the effects of reducing labor costs, increasing leaching rate, and speeding up the reaction

Inactive Publication Date: 2017-05-31
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To sum up, among the current methods for extracting vanadium from high-silica coal stone coal, some of them require high-temperature roasting, some of which require special equipment, especially the leaching solution needs to be heated to above 90°C, and the theory is carried out in the laboratory. It is more suitable for research, but when large-scale extraction of vanadium is carried out in industry, there are disadvantages of large investment, high energy consumption and low leaching rate

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  • Method for extracting vanadium from high-silicon stone coal with MnO2 collaborative heaping process

Examples

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example 1

[0051] Example 1 A kind of 800 tons of MnO 2 Method for Extracting Vanadium from High Silica Coal by Co-stacking Process.

[0052] When the patent of the present invention is used, 10 tons of high-silica coal is crushed to 150 mesh, and 0.2 tons of MnO are added 2 , 0.3 tons of cotton stalk powder, stirring and mixing for 60 minutes; then add 4 tons of concentrated sulfuric acid from the sulfuric acid tank to the mixer, and stir for 60 minutes; then add 1.5 tons of resin barrel effluent, and stir for 45 minutes. Send the stirred wet sandy mixture to the stacking tank with a belt conveyor for stacking, operate according to the above method, continuously stir and transport, stack up to 800 tons, and cover with thermal insulation asbestos cloth. After stacking for 72 hours, shovel out 10 tons of compost with a forklift, pour it into the leaching tank, add 25 tons of water for a stage of leaching, and separate the solid and liquid after leaching for 3 hours. 2 o 5 .

[0053] A...

example 2

[0055] Example 2 A kind of 600 tons of MnO 2 Method for Extracting Vanadium from High Silica Coal by Co-stacking Process.

[0056] When the patent of the present invention is used, 10 tons of high-silica coal is crushed to 75 mesh, and 0.05 tons of MnO 2 , 0.2 tons of cotton stalk powder, stir and mix for 30 minutes; then add 3 tons of concentrated sulfuric acid from the sulfuric acid tank to the mixer, and stir for 40 minutes; then add 1.2 tons of resin barrel effluent, and stir for 30 minutes. Send the stirred mixture to the stacking tank with a belt conveyor for stacking, operate according to the above method, continuously stir and transport, and when stacked to 600 tons, cover with insulation foam. After stacking for 48 hours, use a forklift to shovel out 10 tons of compost, pour it into the leaching tank, add 15 tons of water for a stage of leaching, and perform solid-liquid separation after leaching for 2 hours. .

[0057] Add 15 tons of water to the leaching slag of ...

example 3

[0058] Example 3 A kind of 1000 tons of MnO 2 Method for Extracting Vanadium from High Silica Coal by Co-stacking Process.

[0059] When the patent of the present invention is used, 10 tons of high-silica coal is crushed to 100 mesh, and 0.15 tons of MnO are added 2, 0.1 tons of cotton stalk powder, stirring and mixing for 45 minutes; then add 2 tons of concentrated sulfuric acid from the sulfuric acid tank to the mixer, and stir for 30 minutes; then add 1 ton of resin barrel effluent, and stir for 45 minutes. Send the stirred mixture to the stacking pool with a belt conveyor for stacking, operate according to the above method, continuously stir and transport, and when stacked to 1,000 tons, then cover with thermal insulation asbestos cloth, and after stacking for 36 hours, use a forklift to shovel out the 10-ton stack Put it in the leaching tank, add 20 tons of water for one-stage leaching, stir and leaching for 1 hour, then carry out solid-liquid separation, and the one-sta...

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Abstract

The invention relates to a method for extracting vanadium from high-silicon stone coal with a MnO2 collaborative heaping procedure. According to the technical scheme, the method comprises the steps that firstly, high-silicon stone coal powder, MnO2 powder and cotton straw powder are stirred and then added with concentrated sulfuric acid and liquid flowing out of a macroporous anion exchange resin bucket to be sufficiently mixed, and a stirred mixture is obtained; secondly, the stirred mixture is conveyed into a specially-made large heaping pool to be heaped for 36-72 h in the sealed environment, and then a carbonization-oxidation reaction is conducted to obtain a heaped material; and finally, in the follow-up procedures, the heaped material is shoveled out and added with water to leach vanadium, and V2O5 with the purity being 99.5% or higher is prepared through the processes including solid-liquid separation, leaching liquid pH value adjusting, vanadium adsorption through macroporous anion resin, vanadium elution through strong base and precipitated vanadium roasting. The method has the main characteristics that the metal heap leaching mode is adopted, and the high-silicon stone coal is subjected to large-scale heaping pretreatment and then subjected to vanadium leaching with water. According to the method, ore does not need to be subjected to decarburization roasting, no waste gas is produced, the leaching rate of the vanadium is high, and the method is a novel environment-friendly vanadium extracting method.

Description

technical field [0001] The patent of this invention relates to hydrometallurgical vanadium extraction technology, especially a kind of MnO 2 Method for Extracting Vanadium from High Silica Coal by Co-stacking Process. Background technique [0002] Stone coal is a kind of carbon-bearing sedimentary rock (also known as black shale) that is distributed all over the world and is very rich in reserves. It is associated with a variety of valuable metal elements such as vanadium, silver, copper, nickel, etc. As for metal ore, vanadium-containing stone coal is mostly used as a resource for vanadium development in my country. Vanadium-containing stone coal is divided into high-silicon, high-calcium, high-iron, and high-carbon stone coal according to the content of silicon, calcium, iron, and carbon. The organic carbon content in stone coal is usually about 5%, and the vanadium-containing silicate is wrapped in the form of porphyrin compounds, so that the vanadium in the mineral crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22
CPCC22B34/22
Inventor 程先忠张瑞华李建芬
Owner WUHAN POLYTECHNIC UNIVERSITY