Process for clearly extracting vanadium form vanadium-containing carbonaceous shale

A carbonaceous shale, clean technology, applied in the direction of vanadium oxide, process efficiency improvement, etc., to achieve the effect of high leaching rate, reduced effect, and reduced cost of vanadium extraction

Inactive Publication Date: 2010-02-03
贵州省地质矿产中心实验室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the pollution of the existing vanadium extraction technology to the environment, improve the leaching rate and recovery rate of vanadium, reduce production costs, and provide a method for cleanly extracting vanadium from vanadium-containing carbonaceous shale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, get 100 kilograms of vanadium-containing carbonaceous shale, crush and grind until the ore particles with a particle size of -0.15mm account for 75% of the whole ore, add 100 kilograms of concentration and be 15% hydrochloric acid solution, heat to 80 ° C, Stir, leach for 2 hours, filter, and extract the filtrate through purification, extraction, back extraction, ammonium salt vanadium precipitation and other processes 2 o 5 . Add 80 kg of 15% fluosilicic acid solution to the filter residue, heat to 75°C, gradually add 5 kg of sodium chlorate, stir, leach for 6 hours, filter, and the filtrate is purified, extracted, back-extracted, and vanadium precipitated with ammonium salt and other processes to extract V 2 o 5 .

Embodiment 2

[0027] Embodiment 2, get 100 kilograms of vanadium-containing carbonaceous shale, crush and grind until the ore grains with a particle size of -0.15 mm account for 60 to 70 percent of the total ore, add 50 kilograms of a concentration of 22% hydrochloric acid solution, and heat to 60 ℃, stirred, leached for 5 hours, filtered, and the filtrate was extracted by purification, extraction, back extraction, ammonium salt vanadium precipitation and other processes. 2 o 5. Add 150 kg of 10% fluosilicic acid solution to the filter residue, heat to 100°C, gradually add 1 kg of sodium chlorate, stir, leach for 2 hours, filter, and the filtrate is purified, extracted, back-extracted, and vanadium precipitated with ammonium salt, etc. Process extraction V 2 o 5 .

Embodiment 3

[0028] Embodiment 3, get 100 kilograms of vanadium-containing carbonaceous shale, crush and grind until the ore particles with a particle size of -0.15mm account for 90% of all ores, add 200 kilograms of concentration of hydrochloric acid solution that is 5%, and heat to 100 ° C. Stir, leach for 1 hour, filter, and extract the filtrate through purification, extraction, back extraction, ammonium salt vanadium precipitation and other processes 2 o 5 . Add 60 kg of 25% fluosilicic acid solution to the filter residue, heat to 60°C, gradually add 8 kg of sodium chlorate, stir, leach for 8 hours, filter, and the filtrate is purified, extracted, back-extracted, ammonium salt, vanadium, etc. Process extraction V 2 o 5 .

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Abstract

The invention provides a method for cleaning vanadium extraction from vanadium-containing carbonaceous shale, comprising the following steps of: pulverizing the vanadium-containing carbonaceous shale,adding hydrochloric acid solution, heating, stirring, filtering and making the filter liquid into V2O5 according to the conventional process; and adding fluosilicic acid solution in filter slag, heating, adding gradually oxidizing agent, stirring, filtering and making the filter liquid into V2O5 according to the conventional process. The invention uses the vanadium-containing ore which is unnecessary to roast so as to eliminate the pollution of the vanadium extraction process to atmospheric environment, uses the hydrochloric acid and the fluosilicic acid as main leaching medicament to leach selectively out the vanadium in the vanadium-containing carbonaceous shale without generating new precipitate, reduces the medicament dosage and lowers the cost of the vanadium extraction. The aim of cleaning the vanadium extraction is realized by oxidizing trivalent vanadium undissolvable in the water and diluted acid of the ore into tetravalent vanadium or quinquevalence vanadium dissolvable in the water and diluted acid through wet oxidation. The method has the advantages of mild vanadium extraction condition, high leaching rate of the vanadium, low energy consumption, low demand for equipment, high production safety, investment economization and operating expenses economization.

Description

technical field [0001] The invention relates to the technical field of extracting vanadium from vanadium-containing ores, in particular to a method for cleanly extracting vanadium from vanadium-containing carbonaceous shale Background technique [0002] Vanadium is an important raw material for the preparation of high-tech industries such as special steel, vanadium-titanium alloys, catalysts, and vanadium flow energy storage batteries, and is widely used in modern industrial technology. Vanadium ore resources mainly include vanadium-titanium magnetite and vanadium-bearing carbonaceous shale. Vanadium-bearing carbonaceous shale accounts for 87% of the total vanadium reserves in my country and is an important resource of vanadium. The controlled vanadium resources in Guizhou Province have exceeded 600,000 tons, and the prospective reserves are more than one million tons, and most of them are associated with valuable components such as nickel and molybdenum. They are potential ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B3/10C01G31/02
CPCY02P10/20
Inventor 陈文祥何建炼胡万明
Owner 贵州省地质矿产中心实验室
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