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Calcium sulphate removal method of acid-leaching vanadium-extracted residues

A calcium sulfate and acid leaching technology, applied in the direction of improving process efficiency, can solve problems such as increased sulfur content, environmental pollution, and waste of resources

Inactive Publication Date: 2012-05-23
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acid leaching residue contains a large amount of calcium sulfate, which increases the sulfur content in the residue, which makes it difficult to use the acid leaching residue, and the acid leaching residue can only be directly piled up or landfilled as waste residue. Caused a huge waste of resources, and some elements in the residue caused serious pollution to the environment
[0004] At present, the removal of calcium sulfate in acid leaching vanadium extraction residue has always been a difficult problem, which greatly limits the recovery and utilization of acid leaching vanadium extraction residue.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take 1kg of acid leaching vanadium residue obtained by washing with clean water and filtering, wherein the sulfur content is 3.13%, add 1kg of water for stirring and beating, and use a shaking table to separate the residue slurry after beating to obtain 822.36g of concentrate and 822.36g of tailings. 145.24g. After testing, the sulfur content of the concentrate was 0.013%, the sulfur content of the tailings was 19.17%, and the calcium sulfate in the acid leaching residue was effectively removed.

Embodiment 2

[0014] Take 1kg of acid leaching vanadium residue obtained by washing with clean water and filtering, wherein the sulfur content is 3.26%, add 2kg of water for stirring and beating, and use a shaking table to separate the residue slurry after beating to obtain 805.25g of concentrate and 805.25g of tailings. 151.15g. After testing, the sulfur content of the concentrate was 0.020%, the sulfur content of the tailings was 18.57%, and the calcium sulfate in the acid leaching residue was effectively removed.

Embodiment 3

[0016] Take 1kg of acid leaching vanadium residue obtained by washing with clean water and filtering, which contains 1.53% sulfur, add 3kg of water for stirring and beating, and use a shaking table to separate the residue slurry after beating to obtain 860.42g of concentrate and 860.42g of tailings. 76.02g. After testing, the sulfur content of the concentrate was 0.007%, the sulfur content of the tailings was 17.43%, and the calcium sulfate in the acid leaching residue was effectively removed.

[0017] It can be seen from the description of Examples 1 to 3 that after the acid leaching vanadium residue is processed by gravity beneficiation equipment, the sulfur content in the residue is controlled within the range of 0.007% to 0.020%, which shows that calcium sulfate is extracted from acid leaching. Vanadium residues are effectively removed.

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PUM

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Abstract

The invention discloses a calcium sulphate removal method of acid-leaching vanadium-extracted residues. The method comprises the following steps: washing residues obtained after calcification roasting and sulphuric acid-leaching vanadium extraction, filtering, adding water to prepare into slurry, and sorting the residue slurry by using a gravity concentration device to remove calcium sulphates from the residues. The method can effectively separate the calcium sulphates from the acid-leaching vanadium-extracted residues, there by realizing the reutilization of the acid-leaching vanadium-extracted residues.

Description

technical field [0001] The present invention relates to a method for treating vanadium slag, in particular to a method for removing calcium sulfate from acid leaching vanadium residue by utilizing gravity beneficiation equipment. Background technique [0002] In vanadium production, 88% of the world's annual vanadium is obtained from vanadium titanomagnetite. Vanadium is extracted by smelting vanadium titanomagnetite, using rotary kiln-electric furnace or blast furnace to smelt vanadium-containing molten iron, and then blow vanadium slag from vanadium-containing molten iron to enrich vanadium in vanadium slag, so as to extract vanadium. . [0003] The vanadium extraction process using vanadium slag mainly adopts the water leaching process and the acid leaching process. Among them, the acid leaching process of vanadium is mainly used in the process of producing vanadium pentoxide by vanadium slag lime roasting method. In this process, lime or limestone are added to the vana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B3/08
CPCY02P10/20
Inventor 张林彭毅孙朝晖付自碧高官金陈海军邓杰博孟伟巍顾计勇
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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