Method for producing high-purity ammonium vanadate through low-temperature precipitation

A technology of pure ammonium vanadate and low temperature, applied in chemical instruments and methods, vanadium oxide, vanadium compounds, etc., can solve the problems that the quality of ammonium vanadate cannot be guaranteed, the effect of impurity removal in the leaching process is not obvious, and achieve temperature control The effect of wide range, saving heating steam and reducing production cost

Active Publication Date: 2017-12-22
锦州集信实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can meet the zero discharge of wastewater, in the production process, the circulating water with high sodium salt participates in the leaching process, which makes the impurity removal effect of the leaching process not obvious
As a result, the quality of ammonium vanadate cannot be guaranteed in the precipitation stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 takes Jinzhou vanadium-containing material and vanadium slag sodium roasting as an example, the concrete process of this method is as follows:

[0038] a) Mixing of raw materials: the mixture of vanadium-containing material, vanadium slag and vanadium-precipitated bottom slag is used as vanadium-containing raw material, mixed with sodium salt and precipitated mother liquor evenly, the water content after mixing is 10%, and the dry basis is fed according to the vanadium-containing material : vanadium slag: sodium salt: the mass ratio of the vanadium bottom slag is=51:34:10:15, and the trapped material enters the kiln after 36 hours; the sodium salt is a mixture of soda ash and industrial salt with a mass ratio of 3:1, The vanadium-containing material is high-purity vanadium impurity removal waste produced by wet process, and the mass percentage of total vanadium (TV) in the vanadium-containing material is 2.5%; the mass percentage of total vanadium (TV) in th...

Embodiment 2

[0045] Embodiment 2 takes Jinzhou vanadium-containing material and vanadium slag sodium roasting as an example, the concrete process of this method is as follows:

[0046] a) Mixing of raw materials: the mixture of vanadium-containing material, vanadium slag and vanadium-precipitated bottom slag is used as vanadium-containing raw material, mixed evenly with sodium salt and precipitation mother liquor, the water content after mixing is 20%, and the dry basis is fed according to the vanadium-containing material : vanadium slag: sodium salt: the mass ratio of the vanadium bottom slag is=40:40:8:10, and the trapped material enters the kiln after 48 hours; the sodium salt is a mixture of soda ash and industrial salt with a mass ratio of 3:1, The vanadium-containing material is high-purity vanadium impurity removal waste produced by wet process, and the mass percentage of total vanadium (TV) in the vanadium-containing material is 2.0%; the mass percentage of total vanadium (TV) in th...

Embodiment 3

[0053] Embodiment 3 takes Jinzhou vanadium-containing material and vanadium slag sodium roasting as an example, the specific process of this method is as follows:

[0054] a) Mixing of raw materials: the mixture of vanadium-containing material, vanadium slag and vanadium-precipitated bottom slag is used as vanadium-containing raw material, mixed with sodium salt and precipitated mother liquor evenly, the water content after mixing is 15%, and the dry basis is fed according to the vanadium-containing material : vanadium slag: sodium salt: the mass ratio of the vanadium bottom slag is=35:48:9:12, and the trapped material enters the kiln after 36 hours; the sodium salt is a mixture of soda ash and industrial salt with a mass ratio of 3:1, The vanadium-containing material is high-purity vanadium impurity removal waste produced by wet process, and the mass percentage of total vanadium (TV) in the vanadium-containing material is 1.5%; the mass percentage of total vanadium (TV) in the...

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PUM

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Abstract

The invention relates to a method for producing high-purity ammonium vanadate through low-temperature precipitation. A mixture of vanadium-containing materials, vanadium residues and vanadium precipitation bottom residues is taken as a vanadium-containing raw material and mixed with sodium salt and precipitation mother liquor uniformly for aging, and a clinker is obtained through sodium roasting; the clinker is treated at a leaching stage and leached, and a vanadium solution is obtained; calcium chloride is added to the vanadium solution for phosphorus removal, ammonium polyvanadate crystals are obtained after precipitation, filtration and washing and then calcined, and vanadium pentoxide is obtained. The method has the advantages as follows: the process is simple, reasonable and easy to operate, vanadium-containing waste residues are taken as the raw material, the cost is low, and waste recycling is realized; no industrial wastewater is drained in the whole production process, environmental protection requirements are met, and the produced product has high purity and good yield.

Description

technical field [0001] The invention relates to the field of vanadium slag hydrometallurgy, in particular to a method for producing high-purity ammonium vanadate by low-temperature precipitation. Background technique [0002] Vanadium slag is a vanadium-enriched material produced by blowing vanadium-containing molten iron in the presence of oxygen-containing gas. In the iron and steel industry, vanadium slag produced from vanadium-titanium magnetite is the main raw material for vanadium extraction. At present, the main method for extracting vanadium from vanadium slag is water leaching to extract vanadium after roasting vanadium slag. First, the vanadium slag is ground to -200 mesh, -160 mesh or -120 mesh, mixed with a sodium salt additive, and oxidized and sodium roasted in a rotary kiln. Then the roasted vanadium slag is immersed in water to remove impurities, and acid and ammonium salt are added to precipitate ammonium polyvanadate. After calcining or melting to make va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00C01G31/02
CPCC01G31/00C01G31/02C01P2006/80
Inventor 袁安会赵丽田刚赵思为邱栋
Owner 锦州集信实业有限公司
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