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Utilization method of vanadium precipitation wastewater

A technology for vanadium precipitation wastewater and vanadium slag is applied in the improvement of process efficiency, instruments, optics and other directions, which can solve the problems of non-vanadium and manganese resource recovery and utilization, achieve significant economic value and realize the effect of rational utilization.

Active Publication Date: 2019-11-12
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] None of the above patents recycle the vanadium and manganese resources in the vanadium precipitation wastewater

Method used

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  • Utilization method of vanadium precipitation wastewater

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Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 adopts the inventive method to reclaim vanadium and manganese in the vanadium precipitation wastewater

[0042] Take 10L of vanadium precipitation wastewater (containing 12.2g / L of manganese and 0.15g / L of vanadium), add 35mL of sulfurous acid, stir and react at 40°C for 1.5h, adjust the pH of the solution to 8.0 with 25% ammonia water, and filter to obtain The first filter residue and the first filtrate; add 1.5L acidic anolyte (pH=1.1, containing manganese 5.2g / L) in the filter residue for leaching, adopt sulfuric acid control system pH to be 2.5, carry out solid-liquid separation to obtain the second after the reaction is completed Filter residue and second filtrate (containing manganese 48.7g / L); dry the second filter residue at 80°C, grind it to 120-200 mesh after drying, add 3.0g of CaO and mix it, then roast it at 650°C for 2h, The roasted clinker is obtained, and the clinker is leached with an aqueous solution of pH=3.0, the liquid-solid ratio is 2....

Embodiment 2

[0043] Embodiment 2 adopts the inventive method to reclaim vanadium and manganese in the vanadium precipitation wastewater

[0044]Take 10L of vanadium extraction wastewater (containing 5.4g / L manganese and 0.45g / L vanadium), add 60g of ferrous sulfate, stir and react at 60°C for 1h, adjust the pH of the solution to 8.5 with 25% ammonia water, and filter to obtain The first filter residue and the first filtrate; add 1.0L acidic anolyte (pH=1.2, manganese-containing 6.3g / L) to the filter residue for leaching, adopt sulfuric acid to control the pH of the system to be 3.0, carry out solid-liquid separation after the reaction is completed to obtain the second Filter residue and second filtrate (containing manganese 36.2g / L); dry the second filter residue at 80°C, grind it to 120-200 mesh after drying, add 8.5g of CaO and mix it, then roast it at 880°C for 1h, The roasted clinker is obtained, and the clinker is leached with an aqueous solution of pH=3.0, the liquid-solid ratio is 2...

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Abstract

The invention relates to a utilization method of vanadium precipitation waste water, and belongs to the technical field of metallurgy chemical engineering. The technical problem to be solved by the invention is to provide the utilization method of the vanadium precipitation waste water. the method comprises the following steps: (a) a reducing agent is added in the vanadium precipitation waste water; after the reduction reaction is finished, the pH of solution is adjusted to 8.0-9.0; and first filter residues and first filtrates are obtained through filtration; and (b) manganese in the first filter residues is leached out by using acid water solution for filtration; second filter residues are collected to obtain vanadium-contained residues; and the vanadium precipitation waste water contains manganese. The utilization method of the vanadium precipitation waste water is prominent in economical value, enables the treatment of the vanadium precipitation waste water to be not single negative investment, and realizes reasonable utilization of waste resources in the production process of vanadium oxide.

Description

technical field [0001] The invention relates to a utilization method of vanadium precipitation wastewater, belonging to the technical field of metallurgy and chemical industry. Background technique [0002] In the production of vanadium oxide, the converter vanadium slag is crushed, ball milled, mixed with a certain amount of sodium salt or calcium salt, and then put into the reduction kiln for roasting, and the low-priced vanadium in the vanadium slag is oxidized to pentavalent vanadium which is soluble in water. Vanadium oxide products are obtained through leaching, precipitation, drying and reduction. Among them, the precipitation process will produce a large amount of vanadium precipitation wastewater, which mainly contains vanadium and manganese. At present, the treatment methods of vanadium precipitation wastewater mainly include lime milk neutralization method, reduction neutralization-evaporation concentration method, and there are common problems such as large amou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B47/00C22B34/22C25C1/10
CPCC22B7/00C22B7/007C22B34/22C22B47/00C25C1/10Y02P10/20
Inventor 陈燕何文艺申彪叶露
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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