A method for extracting vanadium pentoxide and carbon from low-carbon stone coal mines

A technology of vanadium pentoxide and stone coal mines, applied in the field of extracting vanadium pentoxide and carbon, can solve the problems of resource waste and high cost, achieve the effects of protecting the natural environment, fully utilizing mineral resources, and realizing three-dimensional development and overall governance

Active Publication Date: 2016-10-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of high cost and serious waste of resources in the existing technology, the present invention provides a method for extracting vanadium pentoxide and carbon from low-carbon stone coal mines

Method used

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  • A method for extracting vanadium pentoxide and carbon from low-carbon stone coal mines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Taking a stone coal vanadium mine in Shaanxi as the original ore, the grade of V2O5 is 0.65%, and the mass content of carbon is 14.4%.

[0052] Step 1 Mixing

[0053] Crushing the raw ore with a particle size of less than 3mm until the particles with a fineness of -0.074mm account for 38% of the total mass of the raw ore, adding water to adjust the slurry to obtain a slurry with a concentration of 25% by mass of the raw ore;

[0054] Step 2 Flotation to obtain carbon rough concentrate

[0055] Add water glass as a dispersant to the slurry obtained in step 1, stir evenly to fully disperse the mineral particles in the slurry, then add carbon collectors and foaming agents, and carry out carbon roughing to obtain carbon rough concentrate and carbon rough Select ore; the dispersant, carbon collector and foaming agent are added to the slurry in the ratio of 800g dispersant, 1000g carbon collector, and 80g foaming agent per ton of raw ore; the carbon collector is made of kero...

Embodiment 2

[0072] Taking a stone coal vanadium mine in Xinjiang as the original ore, its average V2O5 content is 0.88%, and its carbon content is 13.2%.

[0073] Step 1 Mixing

[0074] Crushing the raw ore with a particle size of less than 3mm until the particles with a fineness of -0.074mm account for 40% of the total mass of the raw ore, adding water to adjust the slurry to obtain a slurry with a concentration of 33% of the mass of the raw ore;

[0075] Step 2 Flotation to obtain carbon rough concentrate

[0076] Add a dispersant (composed of sodium hexametaphosphate and sodium fluorosilicate in a mass ratio of 1:1) to the slurry obtained in step 1, stir evenly to fully disperse the mineral particles in the slurry, then add carbon collector and Foaming agent, carry out carbon coarse separation, obtain carbon rough concentrate and carbon rough ore separation; Described dispersant, carbon collector and foaming agent add 850g dispersant, 1200g carbon collector, 80g minimum per ton of raw...

Embodiment 3

[0092] Taking a stone coal vanadium mine in Guizhou as the original ore, its average V2O5 content is 0.72%, and its carbon content is 11.5%.

[0093] Step 1 Mixing

[0094] Crushing the raw ore with a particle size of less than 3mm until the particles with a fineness of -0.074mm account for 35% of the total mass of the raw ore, adding water to adjust the slurry to obtain a slurry with a concentration of 30% of the mass of the raw ore;

[0095] Step 2 Flotation to obtain carbon rough concentrate

[0096] Add a dispersant (composed of sodium hexametaphosphate and sodium fluorosilicate in a mass ratio of 1:1) to the slurry obtained in step 1, stir evenly to fully disperse the mineral particles in the slurry, then add carbon collector and Foaming agent, carry out carbon coarse separation, obtain carbon coarse concentrate and carbon rough ore separation; Described dispersant, carbon collector and foaming agent add 820g dispersant, 1200g carbon collector, 80g min per ton of raw ore...

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Abstract

The invention relates to a method for extracting V2O5 and carbon from a low-carbon stone coal mine, and belongs to the field of beneficiation and metallurgy united technology. According to the method, the low-carbon stone coal mine with the grade of V2O5 larger than or equal to 0.65% and the mass percentage of carbon smaller than or equal to 18% is taken as the raw material, flotation enrichment is performed on carbon and vanadium respectively, industrial fuel with the combustion value of 2,400-3,100 cal / g as well as a vanadium-rich solution is obtained through leaching, and V2O5 is obtained by subjecting the vanadium-rich solution to purification, dissolving, vanadium precipitation and calcination. According to the technology, a pollution-free smelting process is performed through flotation enrichment of carbon and vanadium in stone coal, the smelting treatment quantity is reduced, carbon resources in the stone coal are used sufficiently, the production cost and investment cost are reduced, the total V2O5 recovery rate can reach 78%-82%, the utilization rate of carbon can reach 70%-85%, the low-carbon stone coal mine with low V2O5 grade can be treated, and the method has the advantages of low production cost, environment friendliness and the like and facilitates industrial application.

Description

Technical field: [0001] The invention relates to a method for extracting vanadium pentoxide and carbon from low-carbon stone coal mines, belonging to the technical field of dressing and metallurgy. technical background: [0002] Most of the stone coal vanadium ores in my country are polymetallic associated minerals with low grade and complex composition, which not only contain vanadium, but also contain a large amount of carbon, aluminum, potassium, zinc, magnesium, iron, barium, calcium and other elements. The traditional vanadium extraction process of sodium roasting only extracts the vanadium, and the recovery rate of vanadium is less than 50%, which not only wastes the carbon element in the stone coal, but also cannot recover other valuable elements in the stone coal vanadium ore, and the impurity elements are harmful to the The recovery of vanadium has a great impact, and a large amount of toxic gases such as chlorine gas and hydrogen chloride will be produced during th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00C22B34/22C22B3/08
CPCY02P10/20
Inventor 孙伟王丽胡岳华刘润清张庆鹏
Owner CENT SOUTH UNIV
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