Method for treating vanadium extracting industrial acid wastewater and comprehensively recycling valuable metal

A technology for acidic wastewater and valuable metals, applied in cement production, improvement of process efficiency, calcium/strontium/barium sulfate and other directions, can solve the problem of generating a large amount of slag as mixed slag, affecting the quality of vanadium-enriched products, affecting the Process operation and other problems, to achieve the effects of easy filtration, reduced addition and processing costs, and low requirements for process equipment

Active Publication Date: 2016-05-11
SHENGTONG YIHE TIANJIN ENTERPRISE MANAGEMENT CONSULTING CO LTD
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AI Technical Summary

Problems solved by technology

[0003] However, during the acid leaching process of vanadium ore, impurities such as iron, aluminum, zinc, copper, nickel, cobalt and other heavy metals will enter the acid leaching solution in large quantities, and after the vanadium is enriched by ion resin exchange, extraction or chemical precipitation , various impurity elements remain in the waste water after enrichment of vanadium. If the waste water is not treated, various impurities will gradually circulate and accumulate in the water system, which will affect the operation of the process, cause environmental pollution problems, and seriously affect the vanadium. enrichment and product quality
[0004] The conventional technology for the treatment of acid wastewater in the vanadium extraction industry is neutralization and precipitation, but this method has disadvantages such as high cost of alkali consumption, large consumption of reagents, large amount of generated slag, and mixed slag that is difficult to comprehensively recover valuable metals.

Method used

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  • Method for treating vanadium extracting industrial acid wastewater and comprehensively recycling valuable metal

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Embodiment 1

[0034] A method for the treatment of acidic wastewater in the vanadium extraction industry and the comprehensive recovery of valuable metals. The acidic wastewater to be treated is the sulfuric acid leaching solution that is absorbed and enriched in vanadium by an anion adsorption resin. It contains [V 2 o 5 ]0.05g / L, [P]0.29g / L, [SiO 2 ]0.16g / L, [Fe 3+ ]1.55g / L, [Fe 2+ ]0.009g / L, [Al 3+ ]4.16g / L, [Zn 2+ ]2.16g / L, [Cu 2+ ]0.15g / L, [Cr 3+ ]0.19g / L, [Ni 2+ ]0.095g / L, [Co 2+ ]0.025g / L, [Cd 2+ ] 0.085g / L, pH is 1.8. The method specifically includes the following steps:

[0035] (1) Add 3L of the above-mentioned acidic waste liquid into a 5L mixing tank, which has been oxidized before ion adsorption, and contains Fe 2+ Very low, no need to oxidize.

[0036] (2) Stir and slowly add limestone powder (-200 mesh), control the reaction pH=4.8, make it fully react at room temperature for 2 hours, consume 86.5g of limestone powder, vacuum filter the resulting reaction solution...

Embodiment 2

[0040] A method for the treatment of acidic wastewater in the vanadium extraction industry and the comprehensive recovery of valuable metals. The acidic wastewater to be treated is the raffinate obtained by extracting and enriching vanadium from the sulfuric acid leaching solution, which contains [V 2 o 5 ]0.05g / L, [P]0.29g / L, [SiO 2 ]0.16g / L, [Fe 3+ ]0.005g / L, [Fe 2+ ]4.19g / L, [Al 3+ ]4.16g / L, [Zn 2+ ]2.16g / L, [Cu 2+ ]0.15g / L, [Cr 3+ ]0.19g / L, [Ni 2+ ]0.095g / L, [Co 2+ ]0.025g / L, [Cd 2+ ] 0.085g / L, pH is 2.0. The method specifically includes the following steps:

[0041] (1) Add 3L of the above-mentioned acidic waste liquid into a 5L mixing tank. Due to the reduction before extraction, it contains Fe 2+ The concentration is higher, and the drum air aeration is used for oxidation for 6 hours.

[0042] (2) Stir while blowing in air, slowly add limestone powder (-200 mesh), control the reaction pH=4.8, make it fully react at room temperature for 4 hours, consume 105.5...

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Abstract

The invention discloses a method for treating vanadium extracting industrial acid wastewater and comprehensively recycling valuable metal. The method comprises the following steps that aeration and oxidation are carried out on the acid wastewater, and then a purifying agent A is added and is at least one of limestone, unslaked lime, slaked lime and lime milk; stirring is carried out for reacting, and the pH of the reaction endpoint is controlled to be equal to 4.5 to 5.0; filtering and washing are carried out, and primary purifying liquid and primary purifying residues are obtained; a purifying agent B is added to the primary purifying liquid, and is at least one of unslaked lime, slaked lime and lime milk; stirring is carried out for reacting, and the pH of the reaction endpoint is controlled to be equal to 6.5 to 7.5; filtering and washing are carried out, and secondary purifying liquid and secondary purifying residues are obtained; and a purifying agent C is added to the secondary purifying liquid and is at least one of sodium dimethyldithiocarbamate (SDD), sodium sulfide and barium sulfide, stirring is carried out for reacting, filtering is carried out, and third purifying liquid and third purifying residues are obtained. The method has the beneficial effects of being simple in process step, low in treatment cost, good in valuable metal comprehensive recovery effect and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to a method for the treatment of vanadium-extracting industrial acidic wastewater and comprehensive recovery of valuable metals, in particular to a method for step-by-step and comprehensive recovery of valuable metals from the vanadium-extracting industrial acidic wastewater. Background technique [0002] The sodium chlorination roasting process of vanadium ore has the advantages of simple operation, less impurity content, and easy handling, but it has a great impact on the environment and is not supported by national policies. In contrast, acid leaching processes such as blank roasting or calcified roasting of vanadium ore, full wet leaching and other acid leaching processes will become the future development direction of the vanadium industry. [0003] However, during the acid leaching process of vanadium ore, impurities such as iron, aluminum, zinc, copper, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B21/00C22B23/00C22B19/30C01F11/46C04B7/24
CPCC01F11/46C04B7/24C22B7/006C22B19/30C22B21/0015C22B23/04Y02P10/20Y02P40/10
Inventor 封志敏郭友谦宁顺明徐辉佘宗华任建国万洪强梁保平邢积光王喜昌徐永先刘国政韩其磊
Owner SHENGTONG YIHE TIANJIN ENTERPRISE MANAGEMENT CONSULTING CO LTD
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