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Acidic ammonium salt vanadium precipitation waste water comprehensive utilization method

A technology for precipitation of vanadium with acid ammonium salt and waste water, applied in the field of vanadium metallurgy, can solve the problems of loss and waste of vanadium and excess alkali, long technical process, difficult industrial implementation, etc., and achieves reduction of waste of new water, simple operation, and easy industrialization. applied effect

Inactive Publication Date: 2019-09-17
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] It can be seen that the technical ideas for the comprehensive utilization of vanadium precipitation wastewater in the prior art all have common problems such as long technical process flow, high treatment cost, and difficult industrial implementation, and black water generally enters the wastewater treatment system directly, resulting in Loss and waste of part of vanadium and excess alkali

Method used

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  • Acidic ammonium salt vanadium precipitation waste water comprehensive utilization method

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Comparison scheme
Effect test

Embodiment 1

[0042] Take 230g of APV filter cake with a moisture content of 35%, put it into a Buchner funnel; take 1mL solution A (TV content is 0.25g / L), 99mL solution B (TV content is 0.03g / L), 50mL solution C (TV content is 0.21g / L), after mixing evenly, heat up to 55°C to obtain APV detergent, the pH of the detergent is 4.61; take 50mL of detergent for washing each time, soak for 30s, and wash 3 times in total. After washing, the TV in the APV product is 49.86%, Na 2 O is 0.31%, K 2 O is 0.13%, S is 0.14%, and the product quality meets the requirements. The liquid volume after washing is 146mL, and the TV content is 0.08g / L, then the recovery rate of vanadium in the detergent is 85.51%.

Embodiment 2

[0044] Take 221g of APV filter cake with a water content of 32%, put it into a Buchner funnel; take 1mL solution A (TV content is 0.29g / L), 66mL solution B (TV content is 0.03g / L), 33mL solution C (TV content is 0.34g / L), mix evenly, and heat up to 65°C to obtain APV detergent. After washing, the TV in the APV product is 49.71%, Na 2 O is 0.38%, K 2 O is 0.13%, S is 0.14%, and the product quality meets the requirements. The liquid volume after washing is 95mL, and the TV content is 0.08g / L, then the recovery rate of vanadium in the detergent is 86.59%.

Embodiment 3

[0046] Take 227g of APV filter cake with a moisture content of 34%, put it into a Buchner funnel; take 1mL solution A (TV content is 0.22g / L), 168mL solution B (TV content is 0.04g / L), 101mL solution C (TV content is 0.35g / L), mix evenly, and heat up to 70°C to obtain APV detergent, the pH of which is 6.86; take 90mL of detergent for washing each time, soak for 30s, and wash 3 times in total. After washing, the TV in the APV product is 50.06%, Na 2 O is 0.35%, K 2 O is 0.13%, S is 0.13%, and the product quality meets the requirements. The liquid volume after washing is 261mL, and the TV content is 0.14g / L, then the recovery rate of vanadium in the detergent is 86.53%.

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Abstract

The invention discloses an acidic ammonium salt vanadium precipitation waste water comprehensive utilization method, and belongs to the technical field of vanadium metallurgy. The acidic ammonium salt vanadium precipitation waste water comprehensive utilization method is used for solving problems in the prior art that vanadium precipitation waste water recycling cost is high, and process is long. The acidic ammonium salt vanadium precipitation waste water comprehensive utilization method comprises following steps: a solution A, a solution B, and a solution C are mixed to be uniform so as to obtain a mixed solution; the mixed solution is heated to 50 to 90 DEG C, the system pH value is controlled to be 3.0 to 7.0, and the mixed solution is used for washing of APV filter cake obtained through precipitation slurry filtering. According to the method, high temperature pH value of the APV washing agent, the washing agent temperature, and the washing liquid ratio are controlled, so that vanadium precipitation waste water utilization and recovery of vanadium and ammonium ions are realized, high quality APV products can be obtained, and a new approach is provided for vanadium precipitation waste water comprehensive utilization.

Description

technical field [0001] The invention belongs to the technical field of vanadium metallurgy, and in particular relates to a method for comprehensive utilization of acidic ammonium salt vanadium precipitation wastewater. Background technique [0002] At present, the production of ammonium polyvanadate (hereinafter collectively referred to as APV) by vanadium slag-sodium roasting-water leaching for vanadium extraction-leach solution purification-acid ammonium salt method is the traditional and mainstream vanadium slag industrial production process for vanadium extraction. Sodium, potassium, sulfur and other chemical impurity elements enter the APV slurry, and after washing with a belt vacuum filter-beating tank beating-plate and frame filter press to separate the solution, the impurity content in the produced APV solid phase is still high, K 2 O+Na 2 O ≈ 0.80%, S ≈ 0.50% (in industrial production, the ingredients in APV products are required to be, TV ≥ 49.50%, Na 2 O ≤ 0.40%...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/13C22B7/00C22B34/22C02F103/16
CPCC02F11/00C02F2103/16C22B7/006C22B34/22C02F11/13Y02P10/20
Inventor 郭继科付自碧蒋霖伍珍秀
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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