Dephosphorizing method for acid vanadium leached solution

A leachate and acid technology, applied in the field of dephosphorization treatment, can solve the problems of complex process and insufficient phosphorus removal rate, and achieve the effects of simple process, high phosphorus removal rate and mild reaction conditions

Inactive Publication Date: 2015-04-01
CHONGQING UNIV
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Problems solved by technology

However, in the existing phosphorus removal methods, in addition to comparing single forms of phosphorus (H 2 PO 4 － 、HPO 4 2－ or PO 4 3－ ) in addition to the acidic vanadium leaching solution that exists, for the acidic vanadium leaching solution containing complex forms of phosphorus salts (tripolyphosphate, phosphorus-containing heteropolysalt, etc.) with a pH value not greater than 4, there are complex processes, or The phosphorus removal rate is not high enough

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  • Dephosphorizing method for acid vanadium leached solution

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[0009] A method for removing phosphorus in acidic vanadium leaching solution. In the present invention, the pH value of the acidic vanadium leaching solution is 2.5 to 4.0, and the concentration of phosphorus is 0.6g / L to 1.5g / L; the phosphorus removal agent used during phosphorus removal is composed of A component and B component Composite dephosphorization agent, A component is Al 2 (SO 4 ) 3 (aluminum sulfate), MgSO 4 (magnesium sulfate), CaSO 4 (calcium sulfate), SrSO 4 (strontium sulfate) and ZnSO 4 (Zinc sulfate), the B component is [Fe(OH) n (SO 4 ) m ] q (polyferric sulfate), in [Fe(OH) n (SO 4 ) m ] q Among them, 0.5≤n≤2, 1≤m≤3, 10≤q≤100000; the steps of the phosphorus removal method are as follows:

[0010] (1) Add a composite dephosphorization agent to the acidic vanadium leaching solution, and control the temperature between 20°C and 80°C to fully stir to carry out the phosphorus removal reaction; The molar ratio of phosphorus in the leaching solutio...

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Abstract

The invention provides a dephosphorizing method for an acid vanadium leached solution. The pH value of the acid vanadium leached solution involved in the dephosphorizing method ranges from 2.5 to 4.0, and the phosphorus concentration ranges from 0.6 g/L to 1.5 g/L; the phosphate removing agent adopted in the method is a composite phosphate removing agent composed of a component A and a component B, wherein the component A is one of Al2(SO4)3, MgSO4, CaSO4, SrSO4 and ZnSO4; the component B is [Fe(OH)n(SO4)m]q; in [Fe(OH)n(SO4)m]q, n is greater than or equal to 0.5 and less than or equal to 2, m is greater than or equal to 1 and less than or equal to 3, and q is greater than or equal to 10 and less than or equal to 100000; the molar ratio of the component A to phosphorus in the acid vanadium leached solution and the molar ratio of the component B to the phosphorus in the acid vanadium leached solution are both 0.1-5:1. According to the method, firstly, the composite phosphate removing agent is added into the acid vanadium leached solution for direct phosphorous removal; secondly, reaction liquid is subjected to aging and filtration, and then a dephosphorized vanadium leached solution is obtained. Compared with the prior art, the method has the advantages that the process is simple, and the dephosphorizing rate is high.

Description

technical field [0001] The invention relates to a method for dephosphorizing the acidic vanadium leaching solution produced from converter vanadium slag. Background technique [0002] Vanadium has many uses and is an important strategic resource. At present, most of the converter vanadium slag is used as raw material to extract vanadium from it. The process of extracting vanadium is to obtain clinker after calcification and roasting of converter vanadium slag, and use sulfuric acid as a leaching agent for leaching to obtain an acidic vanadium-containing leaching solution (acid vanadium leaching solution). Then carry out hydrolysis to precipitate vanadium to obtain the precipitate ammonium polyvanadate [(NH 4 ) 2 V 6 o 16 ], and finally obtained vanadium pentoxide (V 2 o 5 ). Because some impurity elements contained in the acidic vanadium leaching solution will have an adverse effect on the vanadium extraction process; especially when the phosphorus content is too larg...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/46C22B34/22
CPCY02P10/20
Inventor 刘作华陈嫚丽陶长元范兴杜军刘仁龙周小霞谢昭明孙大贵左赵宏孔令峰彭浩黄国平刘敏张兴然
Owner CHONGQING UNIV
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