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High-efficiency method of extracting vanadium through sodium treatment

A high-efficiency technology for sodium vanadium extraction, applied in the direction of improving process efficiency, can solve the problems of high moisture content in wet pellets, difficulty in effective drying, poor stability of pelletizing equipment, poor thermal stability of pellets, etc., to achieve good viscosity Excellent junction performance, reduced production cost, and good stability

Active Publication Date: 2019-10-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has problems such as poor stability of pelletizing equipment, high moisture content of wet pellets, difficulty in effective drying, poor thermal stability of pellets, etc., making industrial implementation difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] a. Mix vanadium slag fine powder and sodium carbonate according to the mass ratio of elemental sodium and vanadium in the mixture to 1.4, and uniformly mix in a forced mixer for 20 minutes;

[0046] b. Prepare the bonding solution according to the mass ratio of sodium hydroxide, humic acid and water at 0.1:1.0:7.0, raise the temperature to 75°C, and stir for 6 hours to obtain the bonding solution. The amount of bonding solution added is 6-7% of the mass of the mixture, uniformly mixed in the double-roller mixer for 10-20 minutes;

[0047] c. Enter the pelletizing machine to make pellets, control the roller pressure of the briquetting machine to 0.5-0.8MPa, and control the particle size of the wet pellets to 5-8mm;

[0048] d. Wet bulb drying temperature system: 80℃~100℃, drying for 30min, 200℃~220℃, drying for 30min;

[0049] e. After drying, dry balls are roasted at 750°C for 100 minutes, and the roasted clinker is crushed to a particle size of -120 mesh with an avera...

Embodiment 2

[0052] a. Mix vanadium slag fine powder and sodium carbonate according to the mass ratio of elemental sodium and vanadium in the mixture to 1.9, and uniformly mix in a forced mixer for 20 minutes;

[0053] b. Prepare the bonding solution according to the mass ratio of sodium hydroxide, humic acid and water at 0.1:1.0:13.0, raise the temperature to 75°C, and stir for 8 hours to obtain the bonding solution. The amount of bonding solution added is 9-10% of the mass of the mixture, uniformly mixed in the double-roller mixer for 10-20 minutes;

[0054] c. Enter the pelletizing machine to make pellets, control the roller pressure of the briquetting machine to 0.8-1.0MPa, and control the particle size of the wet pellets to 10-15mm;

[0055] d. Wet bulb drying temperature system: 100℃~130℃, drying for 30min, 250℃~300℃, drying for 30min;

[0056] e. After drying, dry balls are roasted at 790°C for 120 minutes, and the roasted clinker is crushed to a particle size of -120 mesh with an ...

Embodiment 3

[0059] a. Mix vanadium slag fine powder and sodium carbonate according to the mass ratio of elemental sodium and vanadium in the mixture to 2.0, and uniformly mix in a forced mixer for 20 minutes;

[0060] b. Carry out the preparation of bonding solution according to the mass ratio of sodium hydroxide, (humic acid+starch) and water three: 0.1:1.0:14.0, wherein, the mass ratio of humic acid and starch is 50:1, heat up to Stir and react at 95°C for 10 hours to obtain a bonding solution. The amount of bonding solution added is 8-9% of the mass of the mixture, and uniformly mixed in a double-roller mixer for 10-20 minutes;

[0061] c. Enter the pelletizing machine to make pellets, control the roller pressure of the briquetting machine to 1.5-1.9MPa, and control the particle size of the wet pellets to 15-20mm;

[0062] d. Wet bulb drying temperature system: 130℃~150℃, drying for 30min, 270℃~300℃, drying for 30min;

[0063] e. After drying, dry balls are roasted at 830°C for 120 mi...

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Abstract

The invention relates to a high-efficiency method of extracting vanadium through sodium treatment, and belongs to the technical field of vanadium extraction of chemical engineering. The method comprises the following steps of uniformly mixing a vanadium-containing material and sodium salt to obtain a mixed material, and then preparing a bonding solution from sodium hydroxide, a binder and water; furthermore, adding the bonding solution into the above mixed material, and carrying out pelletizing to obtain wet pellets; and finally, conducting drying to obtain dry pellets, roasting the dry pellets at a high temperature, and then adding water and leaching. The method has the advantages that the stability of pelletizing and drying process is good, the equipment malfunction rate is low, the water content of the wet pellets is low so the wet pellets are easy to dry, thus achieving low drying cost; and meanwhile, the roasting process is conducted without adding tail slag, clinker and the like,thus improving the capacity of single roasting equipment by one time or more so as to reduce the production cost.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction chemical industry, and in particular relates to a method for extracting vanadium by high-efficiency sodiumization. Background technique [0002] At present, the use of "vanadium-containing materials-sodium roasting-water leaching to extract vanadium-leach solution purification-acid ammonium salt method to precipitate vanadium-vanadium oxide products" is still the traditional and mainstream vanadium slag industrial production process for vanadium extraction. When the vanadium-containing material is roasted by the sodium process, it is easy to form a low melting point eutectic phase, resulting in the sticking of the roasted material, serious sticking of the roasting equipment, deterioration of the furnace condition, and poor production ability. In order to avoid this industrial production The high frequency of problems occurs, by adding the tailings after vanadium extraction to dilute th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244C22B1/02C22B3/04C22B34/22C22B7/02C22B7/04
CPCC22B1/02C22B1/2406C22B1/244C22B3/04C22B7/006C22B7/02C22B7/04C22B34/22Y02P10/20
Inventor 郭继科付自碧蒋霖伍珍秀李明
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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