Application of calcium sulfate and/or calcium phosphate to removing TOC in wet-method metallurgical raffinate

A technology of hydrometallurgy and raffinate, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of many equipments, incomplete oxidation, high cost, etc. The effect of low reliability, high utilization rate and low price

Inactive Publication Date: 2019-07-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the new impurity metal Fe existing in the TOC process of the existing hydrometallurgical industry raffinate 2+ Ion introduction, incomplete oxidation, use of many equipment, high cost and other problems, the purpose of the present invention is to provide the application of calcium sulfate and / or calcium phosphate in the removal of TOC in hydrometallurgical raffinate, as a solid adsorbent can significantly Reduce the residual phosphorus-containing organic extractant in the raffinate to remove TOC, and the final residual concentration of TOC is lower than 10mg / L

Method used

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  • Application of calcium sulfate and/or calcium phosphate to removing TOC in wet-method metallurgical raffinate

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Effect test

Embodiment 1

[0034] The solid adsorbent is calcium sulfate and calcium phosphate, and the mass ratio of the two is 1:3.

[0035] The solid adsorbent of the present invention is applied to the raffinate obtained from the nickel-removing process of wet zinc smelting of Mengzi Mining and Metallurgical Environmental Protection Technology Branch. The nickel ion concentration in the iron removal preliquid is 1.03g / L, and the nickel is removed by extraction. The extractant is phosphorus-containing organic P204, and the dispersant is kerosene. The TOC of the raffinate obtained after the iron removal is completed and the liquid separation is 1300 mg / L.

[0036] The action mode of the solid adsorbent is as follows: the slurry prepared by the solid adsorbent is uniformly and continuously added to the leachate, and after the magnetic stirring and the adsorption reaction are completed, the adsorbent reaction product enters the underflow solid phase. The initial pH of the extract is 2.5 and the final pH is ...

Embodiment 2

[0038] The solid adsorbent is calcium sulfate.

[0039] The solid adsorbent of the present invention is applied to the raffinate obtained from the cobalt removal process of the hydrometallurgical zinc smelting of Chihong Zinc and Germanium Huize Smelting Branch. The cobalt ion concentration in the iron removal preliquid is 4.54g / L, and the cobalt is removed by extraction. , The extractant is phosphorus-containing organic P507, and the dispersant is kerosene. The TOC of the raffinate obtained after the iron removal is completed and the liquid separation is 660 mg / L.

[0040] The action mode of the solid adsorbent is as follows: the slurry prepared by the solid adsorbent is uniformly and continuously added to the leachate, and after the magnetic stirring and the adsorption reaction are completed, the adsorbent reaction product enters the underflow solid phase. The initial pH of the extract is 3.2 and the final pH is 3.4, which basically does not change the acid-base balance of the s...

Embodiment 3

[0042] The solid adsorbent is calcium sulfate and calcium phosphate with crystal water, the mass ratio of the two is 1:5.

[0043] The solid adsorbent of the present invention is applied to the raffinate obtained from the copper-removing process of wet zinc smelting in the third workshop of the electric nickel smelter of Jinchuan Nickel Smelter. The copper ion concentration in the pressurized oxygen leaching solution is 1.83g / L, and the copper is removed by extraction. , The extractant is phosphorus-containing organic P204, and the dispersant is kerosene. The TOC of the raffinate obtained after the iron removal is completed and the liquid separation is 980 mg / L.

[0044] The action mode of the solid adsorbent is as follows: the slurry prepared by the solid adsorbent is uniformly and continuously added to the leachate, and after the magnetic stirring and the adsorption reaction are completed, the adsorbent reaction product enters the underflow solid phase. The initial pH of the ext...

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Abstract

The invention discloses an application of calcium sulfate and / or calcium phosphate to removing TOC in wet-method metallurgical raffinate. The calcium sulfate and / or calcium phosphate as a solid adsorbent is added to the raffinate and used for reducing the content of the TOC in the raffinate. The solid adsorbent has the unique selective adsorbability on phosphorus-containing organic matter, the concentration of the residual TOC in the system is lower than 10 mg / L, and the problems that emission or reuse cannot be conducted when the value of the TOC in the residual raffinate does not reach the national standard and the subsequent electro-deposition process is affected when the concentration of the TOC in the surplus raffinate exceeds the standard are effectively solved.

Description

Technical field [0001] The invention relates to the application of calcium sulfate and / or calcium phosphate to remove TOC in hydrometallurgical raffinate, and belongs to the field of purification and impurity removal at the intersection of hydrometallurgy and environment. Background technique [0002] Extraction, also known as solvent extraction or liquid-liquid extraction, also known as extraction, is a unit operation that uses the different solubility of the components in the system to separate the mixture. That is, it is a method to transfer the solute substance from one solvent to the other by using the difference in solubility or partition coefficient of the substance in two incompatible (or slightly soluble) solvents. It is widely used in chemistry, metallurgy, food and other industries. Compared with other methods of separating solution components, extraction has the advantages of normal temperature operation, energy saving, no solids, gas, and convenient operation. Extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F103/10
CPCC02F1/281C02F2103/10
Inventor 孙伟卢承龙岳彤韩海生胡岳华杨越
Owner CENT SOUTH UNIV
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