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Method for removing silicon and phosphorus from blank roasting-ammonia leaching vanadium extracting solution

A blank roasting and ammonia leaching technology, applied in the direction of improving process efficiency, can solve the problems of incomplete silicon removal by silicon remover, increase vanadium loss, difficult to clarify vanadium liquid, etc., and achieve good environmental and economic benefits and vanadium loss. The effect of lowering and lowering production costs

Pending Publication Date: 2020-12-18
承德钒钛新材料有限公司 +2
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Problems solved by technology

[0004] Aiming at the technical problems that the method for purifying vanadium liquid in the prior art will increase vanadium loss, it is difficult to obtain clarified vanadium liquid, and silicon removal agent is not thorough, the present invention provides a method for removing silicon and phosphorus by blank roasting-ammonia leaching vanadium liquid

Method used

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  • Method for removing silicon and phosphorus from blank roasting-ammonia leaching vanadium extracting solution
  • Method for removing silicon and phosphorus from blank roasting-ammonia leaching vanadium extracting solution
  • Method for removing silicon and phosphorus from blank roasting-ammonia leaching vanadium extracting solution

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Embodiment

[0018] The embodiment of the present invention provides a method for removing silicon and phosphorus by blank roasting-ammonia leaching vanadium solution:

[0019] Mix polyacrylamide and water at a mass ratio of 1:3000-5000, heat to 35-45°C, and stir at a stirring speed of 350-400r / min for 40-80min to obtain an aqueous solution of polyacrylamide.

[0020] Control the vanadium concentration of blank roasting-ammonia leaching vanadium solution (silicon content is 131ppm, phosphorus content is 36ppm) to 8-10g / L, pH value is 7-7.3, and the prepared polyacrylamide aqueous solution is added to the blank roasting -In the ammonia leaching vanadium solution, the volume ratio of the flocculant solution to the blank roasting-ammonia leaching vanadium solution is 1:320~400, flocculate and settle at 60~70°C for 20~40min, and then use a fine filter Solid-liquid separation. The specific numerical values ​​of each embodiment are shown in Table 1.

[0021] Table 1

[0022]

[0023]

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Abstract

The invention relates to the field of vanadium liquid purification, in particular to a method for removing silicon and phosphorus from a blank roasting-ammonia leaching vanadium extracting solution. The method comprises the following steps: regulating the pH value of the blank roasting-ammonia leaching vanadium extracting solution to 7-7.3, adding a polyacrylamide water solution, carrying out flocculating settling at 60-70 DEG C, and carrying out solid-liquid separation. The method has the advantages that new ionic impurities are not introduced in the silicon and phosphorus removal process, the vanadium loss is reduced by 40% compared with that of a traditional process, efficient silicon and phosphorus removal is achieved, the process is simple, operation is easy, the production cost is low, and good environmental benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the field of vanadium liquid purification, in particular to a method for removing silicon and phosphorus from a vanadium liquid by blank roasting-ammonia leaching. Background technique [0002] Vanadium is an important strategic material. With the development of science and technology, the application fields of vanadium continue to expand, and the requirements for the purity of vanadium products are also getting higher and higher. At present, the vanadium extraction process generally includes raw material preparation, roasting, leaching, vanadium liquid purification, vanadium precipitation, APV calcination and casting. The effect of vanadium liquid purification in the above process directly affects the subsequent process of vanadium precipitation and calcination process. And the quality of other subsequent vanadium products plays a decisive role, so the choice of vanadium liquid purification method is particularly important. ...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/44C22B3/14
CPCC22B34/22C22B3/44C22B3/14Y02P10/20
Inventor 王海旭李兰杰赵备备朱立杰白丽
Owner 承德钒钛新材料有限公司
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