Method of vanadium slag pretreatment desilication and medium circulation

A medium circulation and pretreatment technology, applied in the fields of chemical industry and metallurgy, can solve the problems of low desiliconization efficiency, high cost, complicated process, etc., and achieve the effect of good desiliconization effect, low cost and simple process

Inactive Publication Date: 2018-06-08
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved in the present invention are: complex process, high cost, low desiliconization efficiency and other problems during the desiliconization of vanadium slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 adopts the inventive method to process vanadium slag

[0036] Take 20 tons of crude vanadium slag with a particle size of 2-3 cm, add 100 cubic meters of water, 10 tons of sodium hydroxide, 10 tons of calcium oxide and 30 tons of steel balls, including 20 tons of 60-80 mm steel balls and 100-120 mm steel balls. 7.5 tons of balls, 2.5 tons of 300-350mm steel balls, ball milled at 800rpm for 5 hours, and the obtained slurry was separated by a roller sieve with an aperture of 0.5 cm and a length of 5 meters to obtain iron particles and coarsely divided slurry. The particles are returned to the ball mill for secondary ball milling to recover vanadium slag. The slurry is further passed through a 120-mesh vibrating sieve, and the fine iron particles on the sieve are washed with clean water and then returned to the converter as a coolant for vanadium extraction. The selected slurry enters a 300-cubic settling tank and settles for 4 hours to obtain lye and refined...

Embodiment 2

[0037] Embodiment 2 adopts the inventive method to process vanadium slag

[0038] Take 20 tons of crude vanadium slag with a particle size of 3-5 cm, add 120 cubic meters of water, 10 tons of potassium hydroxide, 15 tons of calcium oxide and 40 tons of steel balls, including 30 tons of 60-80 mm steel balls and 100-120 mm steel balls. 8 tons of balls, 2 tons of 300-350mm steel balls, ball milled at 900rpm for 2 hours, and the obtained slurry was separated by a roller sieve with an aperture of 0.5 cm and a length of 5 meters to obtain iron particles and coarsely divided slurry. The particles are returned to the ball mill for secondary ball milling to recover vanadium slag. The slurry is further passed through a 120-mesh vibrating sieve, and the fine iron particles on the sieve are washed with clean water and then returned to the converter as a coolant for vanadium extraction. The selected slurry enters a 300 cubic sedimentation tank and settles for 3 hours to obtain lye and ref...

Embodiment 3

[0039] Embodiment 3 adopts the inventive method to process vanadium slag

[0040]Take 20 tons of crude vanadium slag with a particle size of 4-5 cm, add 150 cubic meters of water, 30 tons of sodium carbonate, 5 tons of calcium oxide and 50 tons of steel balls, including 30 tons of 60-80 mm steel balls and 100-120 mm steel balls 15 tons, 5 tons of 300-350mm steel balls, ball milling at 600rpm for 7 hours, the obtained slurry is separated by a roller sieve with a hole diameter of 0.5 cm and a length of 5 meters to obtain iron particles and coarsely divided slurry, large iron particles Return to the ball mill for secondary ball milling to recover vanadium slag. The slurry is further passed through a 120-mesh vibrating sieve, and the fine iron particles on the sieve are washed with clean water and then returned to the converter as a coolant for vanadium extraction. The selected slurry enters a 300 cubic sedimentation tank and settles for 4 hours to obtain lye and refined vanadium...

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Abstract

The invention belongs to the field of chemical engineering and metallurgy, and specifically relates to a method of vanadium slag pretreatment desilication and medium circulation. The method of the vanadium slag pretreatment desilication and the medium circulation aims at solving the problems of complicated process, high cost and low desilication efficiency in removing silicon from the vanadium slag. The method comprises the following steps that a, coarse vanadium slag is mixed with calcium material and alkaline medium to wet ball milling, and then the vanadium slag and iron particles are separated after the ball milling; b, a flotation desilicication treatment is carried out to the slurry containing vanadium slag separated from the step a, and the slurry after desilicication is obtained; and c, desilicated slurry after the step b is naturally settled and the alkaline medium and fine vanadium slag are obtained by separation. The silicon in the vanadium slag can be removed to less than 0.5%, the desiliconization effect is good, the technology is simple, the cost is low, and the method is suitable for popularization and application

Description

technical field [0001] The invention belongs to the fields of chemical industry and metallurgy, and in particular relates to a method for vanadium slag pretreatment desiliconization and medium circulation. Background technique [0002] Vanadium slag is the most important raw material for vanadium extraction, and more than 85% of vanadium products are extracted from vanadium slag. Since a certain amount of quartz sand is often added as a coolant during the vanadium extraction process of the converter, the vanadium slag obtained by blowing contains 5-10% silicon. However, in the extraction of vanadium from vanadium slag by the existing sodium roasting, calcification roasting or sub-molten salt technology, the presence of silicon will lead to problems such as high consumption of sodium salt additives, difficulty in stabilizing the roasting process, and low vanadium transfer leaching rate. . Therefore, it is easier to obtain better technical and economic indicators by desilico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/00C22B34/22
CPCC22B1/005C22B7/04C22B34/22Y02P10/20
Inventor 刘景景
Owner PANZHIHUA UNIV
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