Preparation method of raw extraction fluid in wet vanadium extraction process and implementation equipment of preparation method

Abstract

The invention belongs to the technical field of a wet vanadium extraction process, and particularly relates to a preparation method of raw extraction fluid in the wet vanadium extraction process and implementation equipment of the preparation method. The preparation method comprises the following steps that sulfuric acid is added into stone coal raw ore, solid-liquid separation is carried out after acid leaching pulp is obtained, and leached fluid is obtained; the leached fluid is delivered to a scrap iron reduction pool, pentavalent vanadium ions and ferric ions are subjected to reduction, and reduction fluid is obtained; emulsion is obtained after pH value of the reduction fluid is adjusted with lime milk, then solid-liquid separation is carried out, and neutralized supernatant fluid is obtained; and sodium thiosulfate is added into the neutral supernatant fluid, the rest of the pentavalent vanadium ions and ferric ions are subjected to reduction, and the raw extraction fluid is obtained after pH value is adjusted. The implementation equipment comprises the scrap iron reduction pool, a neutralizing tank, a solid-liquid separation pool, a reduction stirring tank and a delivery pump. The material properties can be ensured through a combined reduction method, the extraction requirements are met, and due to the fact that compared with the mode of using sodium thiosulfate as a reduction agent, the mode of using scrap iron as the reduction agent has the advantages of low consumption and low price, the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of wet vanadium extraction process, and in particular relates to a method for preparing raw liquid in the wet vanadium extraction process and equipment for its implementation. Background technique [0002] At present, the known all-wet extraction of vanadium requires several processes such as strong acid leaching, solid-liquid separation, solvent extraction, and ammonium salt vanadium precipitation. Among them, stone coal is subjected to strong acid leaching and solid-liquid separation process to obtain leaching solution. Most vanadium ions are dissolved in the leaching solution in the form of pentavalent vanadate, and the leaching solution also contains a certain amount of ferric ions. However, in the solvent extraction process, the extraction agent used is a mixture of TBP, P204 and solvent oil, which has certain requirements on the properties of the extraction stock solution, so the leachate must first me...

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Problems solved by technology

[0004] But the used reductant of traditional reduction process is generally sodium thiosulfate, there are following problems, the first, its consumption is bigger in the whole reduction process, and because the unit price of sodium thiosulfate is higher, cause whole production cost higher Second, when using sodium thiosulfate for reduction, a sulfur precipitate will be formed during the reduction process, which will easily form a three-phase substance after being brought into the extraction, which is difficult to separate and will easily affect the extraction efficiency; third, after the reduction is completed, it is necessary to use The liquid ammonia is neutralized to make it meet the requirements of the extraction stock solution, and the consumption of liquid ammonia in this process is also relatively large, resulting in a further increase in production costs

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