Method for extracting vanadium again from tailing after extracting vanadium from vanadium tailing of converter
A converter vanadium slag and tailing slag technology, applied in the field of vanadium extraction, can solve the problems of waste, high cost, vanadium residue and the like
Inactive Publication Date: 2011-08-31
CHONGQING UNIV
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However, in the existing methods of extracting vanadium including the "Method for Leaching Converter Vanadium Slag by Electrocatalytic Oxidation", there is still a small amount of but not negligible in the tailings of the converter vanadium slag after vanadium extraction Vanadium Residues
Because these vanadium residues cannot be proposed by the methods of the prior art, and because of their low content, there is a problem that the cost is higher when wanting to extract vanadium again from the converter vanadium slag tailings after vanadium extraction, so, So far, these tailings have basically been disposed of as waste
Obviously, from the perspective of resource utilization, this is still a waste
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[0014] A method for extracting vanadium again from tailings after vanadium extraction from converter vanadium slag, the method comprises the following steps:
[0015] (1) Mix the tailings of converter vanadium slag after vanadium extraction, lixiviating agent sulfuric acid and oxidant to prepare ore slurry;
[0016] (2) The ore slurry obtained in step (1) is placed in a leaching tank without a diaphragm, and the power is turned on to carry out an electrocatalytic oxidation reaction;
[0017] (3) performing solid-liquid separation on the ore slurry after the electrocatalytic oxidation reaction in step (2) to obtain a filtrate containing vanadyl sulfate;
[0018] In the present invention, in step (1), the tailings are in the form of powder after passing through a 100-mesh sieve, the percentage concentration of the sulfuric acid is 10-30%, and the oxidant is ferrous sulfate;
[0019] Wherein, the vanadium contained in the tailings: sulfuric acid: ferrous sulfate = 0.208g: 80mL: ...
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The invention discloses a method for extracting vanadium again from tailing after extracting vanadium from vanadium tailing of a converter. The method comprises the following steps: mixing the tailing of vanadium tailing of the converter after vanadium extraction, sulfuric acid leaching agent and ferrous sulfate oxidant so as to prepare ore pulp; putting the ore pulp in a non-diaphragm leaching tank so as to carry out electrocatalysis and oxidizing reaction; and carrying out solid and liquid separation on the ore pulp after electrocatalysis and oxidizing reaction, thus obtaining filtrate containing vanadyl sulfate. After the filtrate containing vannadyl sulfate is obtained, vanadyl sulfate or hydrate thereof can be alternatively prepared through the conventional prior art; and vanadium pentoxide also can be prepared, or vanadium is further reduced. The method provided by the invention can be used for extracting more vanadium which can not be extracted from the tailing basically in the prior art, thus being a better method which ensures lower cost and better recourse utilization.
Description
technical field [0001] The invention relates to a method for extracting vanadium from converter vanadium slag, in particular to a method for extracting vanadium again from tailings after vanadium extraction from converter vanadium slag. Background technique [0002] Vanadium (V) is an important industrial raw material; converter vanadium slag is a by-product of vanadium iron ore raw material, which is produced by converter steelmaking, and it is also the main raw material for extracting vanadium. Vanadium pentoxide (V 2 o 5 ) can not only obtain the oxides of vanadium available in related industries, but also can conveniently reduce vanadium. Among the methods for extracting vanadium from converter vanadium slag, the direct acid leaching method is a less polluting vanadium extraction method. Its specific steps include: ① using sulfuric acid (H 2 SO 4 ) mixed with converter vanadium slag to prepare ore slurry; ②Stir and stand to leach vanadyl sulfate (VOSO 4 ); ③ filter...
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IPC IPC(8): C22B7/00C22B3/08C22B34/22
CPCY02P10/20
Inventor 刘作华李艳陶长元刘仁龙彭浩牟天明周小霞杜军范兴孙大贵左赵宏宁伟征孙瑞祥曾启琴
Owner CHONGQING UNIV