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A method for extracting vanadium from high-calcium stone coal

A technology of stone coal and high calcium, applied in the field of hydrometallurgy, can solve the problems of easy damage of mixer, low grinding output, environmental pollution, etc., and achieve the effects of simplifying production process, environmental protection and saving, and low pollution.

Active Publication Date: 2020-09-08
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the deficiencies of the existing sulfuric acid aging method, and aims to solve the problems of low grinding output, cumbersome procedures, easy damage to the mixer, environmental pollution, etc.

Method used

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  • A method for extracting vanadium from high-calcium stone coal
  • A method for extracting vanadium from high-calcium stone coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) get the massive high-calcium stone coal (V 2 o 5 The mass content of CaO is 1.28%, the mass content of CaO is 8.14%) 105 tons, adds 29.4 tons of circulating water in ball mill 17 and carries out wet grinding 10min, the grinding output of high-calcium stone coal is 25 tons / hour, obtains particle size It is 80 mesh pulp.

[0057] (2) Open the pulp control valve 301, continuously flow the pulp into the closed pool 1 through the PVC mixture delivery pipeline 1701, and open the sulfuric acid control valve 302 at the same time to add 42 tons of concentrated sulfuric acid to the closed pool 1 (approved by the sulfuric acid metering pump 11) , the two are mixed by themselves to obtain a thin muddy mixture; when importing ore pulp and concentrated sulfuric acid, close the suction port 2 of the airtight pool 1, open the exhaust control valve 501 and the exhaust fan 16, and the waste gas in the airtight pool 1 is transported to The washing tower 7 performs absorption treatme...

Embodiment 2

[0064] (1) get the massive high-calcium stone coal (V 2 o 5 The mass content of CaO is 1.57%, the mass content of CaO is 10.46%) 110 tons, in ball mill 17, add 41.8 tons of circulating water and carry out wet grinding 10min, the grinding output of high-calcium stone coal is 25 tons / hour, obtain particle size It is 100 mesh pulp.

[0065] (2) Open the pulp control valve 301, continuously flow the pulp into the closed pool 1 through the PVC mixture delivery pipeline 1701, and open the sulfuric acid control valve 302 at the same time to add 49.5 tons of concentrated sulfuric acid to the closed pool 1 (approved by the sulfuric acid metering pump 11) , the two are mixed by themselves to obtain a thin muddy mixture; when importing ore pulp and concentrated sulfuric acid, close the suction port 2 of the airtight pool 1, open the exhaust control valve 501 and the exhaust fan 16, and the waste gas in the airtight pool 1 is transported to The washing tower 7 performs absorption treatm...

Embodiment 3

[0072] (1) get the massive high-calcium stone coal (V 2 o 5 The mass content of CaO is 1.18%, the mass content of CaO is 9.47%) 115 tons, adds 38.5 tons of circulating water in ball mill 17 and carries out wet grinding 10min, the grinding output of high-calcium stone coal is 25 tons / hour, obtains particle size It is 120 mesh pulp.

[0073] (2) Open the pulp control valve 301, continuously flow the pulp into the closed pool 1 through the PVC mixture delivery pipeline 1701, and open the sulfuric acid control valve 302 at the same time to add 48.3 tons of concentrated sulfuric acid to the closed pool 1 (approved by the sulfuric acid metering pump 11) , the two are mixed by themselves to obtain a thin muddy mixture; when importing ore pulp and concentrated sulfuric acid, close the suction port 2 of the airtight pool 1, open the exhaust control valve 501 and the exhaust fan 16, and the waste gas in the airtight pool 1 is transported to The washing tower 7 performs absorption trea...

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Abstract

The invention discloses a method for extracting vanadium from high-calcium stone coal, which comprises the following steps: directly transport the ore slurry obtained by wet grinding the raw ore in a ball mill to a closed pool, and directly mix it with concentrated sulfuric acid, and use concentrated sulfuric acid to The heat of dilution and the heat of chemical reaction are used to mature the high-calcium stone coal; then add water in the closed pool, blow air and stir to leach vanadium, and obtain a blue vanadium leaching solution after solid-liquid separation, which is used to prepare V 2 o 5 product. The invention adopts wet grinding method, directly grinds ore without drying, and has high grinding output, low noise, and no dust; the matured slag is in the form of thin mud without crushing, and can directly add water to leach vanadium; the aging process adopts a heat-insulating airtight The pool is conducive to the aging efficiency; the combination of the aging pool and the leaching tower effectively prevents the pollution of the environment by the exhaust gas during the aging process. The invention preferably overcomes the problems of cumbersome process, high cost and environmental pollution existing in the existing concentrated sulfuric acid ripening vanadium extraction technology.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and more specifically relates to a method for extracting vanadium from high-calcium stone coal. Background technique [0002] High-calcium stone coal is a kind of vanadium-containing stone coal, and its CaO content is usually above 5%, which is one of the important resources for vanadium extraction. However, high-calcium stone coal is a type of ore that is difficult to process in the vanadium extraction industry because it is rich in a large amount of dolomite, calcite, and limestone minerals. If the traditional roasting-acid leaching method is used, calcium vanadate will be generated during the leaching process, resulting in a low vanadium leaching rate. In order to improve the vanadium leaching rate, many invention patents disclose the flotation method to remove calcium-containing minerals . The published Chinese invention patents (publication numbers CN103706465A, CN102274795A, CN103...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B3/02C22B34/22
CPCC22B3/02C22B3/08C22B34/22Y02P10/20
Inventor 程先忠胡廷平张瑞华周国庆彭新宇
Owner WUHAN POLYTECHNIC UNIVERSITY
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