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Comprehensive recovery technology of valuable components in corundum smelting smoke ash containing gallium and potassium

A soot and corundum technology, applied in aluminum hydroxide and potassium sulfate waste, treatment of corundum smelting soot, and low-cost recovery of gallium metal

Active Publication Date: 2013-04-24
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art in the comprehensive recovery of valuable components in corundum soot, the present invention provides a brand-new process for processing corundum soot. The high-efficiency extraction of gallium in soot and the comprehensive recovery of valuable components such as potassium and aluminum in soot have been realized effectively, and the process will not emit secondary pollutants

Method used

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  • Comprehensive recovery technology of valuable components in corundum smelting smoke ash containing gallium and potassium
  • Comprehensive recovery technology of valuable components in corundum smelting smoke ash containing gallium and potassium
  • Comprehensive recovery technology of valuable components in corundum smelting smoke ash containing gallium and potassium

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Embodiment 1

[0032] A full-process process for efficiently recovering gallium metal from corundum soot and extracting aluminum hydroxide and potash fertilizer.

[0033] The first step is to pretreat the soot, the process flow is shown in the attached figure 1 . The specific implementation method of pretreatment is: according to the liquid-solid ratio of 5:1~2:1, add soot and ash to the potassium hydroxide solution with a concentration of 10%~40%, and react at a temperature of 100~200°C for 1~3h , and then pass carbon dioxide into the reacted solution at a temperature of 75-95° C. to make the pH of the solution <9, and then filter to obtain the carbonated mother liquor and carbonated slag.

[0034] The second step is to use the carbonated mother liquor obtained in the first step as a raw material to produce potassium sulfate fertilizer. The process flow is shown in the attached figure 2 . The specific implementation of this step is as follows: add sulfuric acid to the carbonation mother...

Embodiment 2

[0045] Example 2: Efficient leaching of gallium in corundum soot

[0046] The concrete steps of this embodiment are as follows:

[0047] ① Prepare a potassium hydroxide solution with a concentration of 10%, add corundum soot at a liquid-solid ratio of 5:1, react at 200°C for 1 hour, and then pass carbon dioxide into the reacted solution at a temperature of 95°C to make the pH of the solution reach After 8.5, filter to obtain carbonated slag;

[0048] ②At room temperature, treat the carbonated slag with 1M sulfuric acid at a liquid-solid ratio of 3:1 for 0.5 hours and then filter to obtain high-silicon slag and pickling solution.

[0049] Through analysis, it is found that the process of this embodiment can realize 92% gallium in the corundum soot.

Embodiment 3

[0050] Example 3: Efficient comprehensive recovery of gallium, aluminum and potassium in corundum soot

[0051] The concrete steps of this embodiment are as follows:

[0052] The first step is to prepare a potassium hydroxide solution with a concentration of 40%, add corundum soot according to the liquid-solid ratio of 2:1, react at 100°C for 3 hours, and then pass carbon dioxide into the reacted solution at 75°C to make After the pH of the solution reached 8.8, it was filtered to obtain carbonated slag and carbonated slag. ;

[0053] In the second step, sulfuric acid is added to the carbonation mother liquor to make the pH value of the filtrate reach 6, and then evaporate and crystallize to obtain potassium sulfate fertilizer.

[0054] The third step is to reclaim gallium and aluminum from the carbonated slag obtained in the first step, and the specific implementation of this step is as follows:

[0055] 1. At room temperature, according to the liquid-solid ratio of 5:1, u...

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Abstract

The invention discloses a comprehensive recovery technology of valuable components in corundum smelting smoke ash containing gallium and potassium. The technology comprises pretreatment of the corundum smoke ash, acid dipping, neutralization, alkali dissolution, precipitation, electrolysis, etc., wherein the pretreatment of the corundum smoke ash is a treating method of damaging smoke dust structure and combining carbon components through alkali, and the pretreatment successfully solves problems of difficult filtering of the smoke dust through direct acid dipping and low extraction efficiency of the gallium in the smoke ash. In addition, the technology does not use ion exchange or extraction to enrich the gallium. The technology can comprehensively recover metal gallium, potassium sulfate fertilizer, aluminium hydroxide and other valuable components from the smoke ash with a low cost and a high efficiency, and is suitable for industrial application.

Description

technical field [0001] The present invention relates to a treatment method for corundum smelting soot, in particular to a process for comprehensively recovering valuable components from gallium and potassium-containing corundum smelting soot, specifically referring to the low-cost processing method from gallium-containing high-potassium corundum smelting soot The invention discloses a process for recovering gallium metal, aluminum hydroxide and potassium sulfate waste materials, belonging to the technical field of recycling waste resources. Background technique [0002] Corundum soot is a solid waste produced in the production of brown corundum arc smelting with bauxite as raw material. The soot ash contains relatively high content of gallium and aluminum, especially, the corundum soot ash from Henan and Shanxi also contains relatively high potassium (the highest content can reach more than 8%), which makes it have a greater recovery The use of value has also derived more e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B3/04C22B3/44C22B26/10C22B58/00
CPCY02P10/20
Inventor 杨娟周向阳邵建荣王松灿王辉龙波刘宏专
Owner CENT SOUTH UNIV
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