Method for separating ferrum and vanadium in vanadium pickle liquor

A technology of soaking solution and vanadic acid, which is applied in the field of separating iron and vanadium in vanadic acid soaking solution, can solve the problems of poor separation effect of iron and vanadium, and achieve the effects of small consumption of chemicals, efficient separation and simple process flow

Active Publication Date: 2016-11-09
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of poor separation effect of iron and vanadium in the prior art, and provide a technology with simple process flow, low reagent consumption, and efficient separation of iron and vanadium in vanadic acid leaching solution

Method used

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  • Method for separating ferrum and vanadium in vanadium pickle liquor
  • Method for separating ferrum and vanadium in vanadium pickle liquor

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Effect test

Embodiment 1

[0023] A method for separating iron and vanadium in vanadic acid leaching solution, its concrete steps are:

[0024] Add Na to the vanadic acid immersion solution 2 SO 3 , stirred, and carried out a reduction reaction at 75°C for 20 minutes to obtain a reduced solution;

[0025] Add milk of lime to adjust the pH of the reduced solution to 1.7 to obtain the adjusted emulsion; then separate the solid and liquid of the adjusted emulsion to obtain the original solution and the pH-adjusted slag;

[0026] 15% 2-ethylhexyl phosphoric acid-mono-2-ethylhexyl ester, 35% trialkyl tertiary amine and 50% sulfonated kerosene by volume are mixed with the extraction stock solution at a volume ratio of 0.2:1, and stirred After 3 minutes, the mixed phase was obtained; the mixed phase was separated after standing, and after 4 stages of extraction, the vanadium-loaded organic phase and the iron-containing raffinate were obtained. The ion concentrations of vanadic acid soaking solution and raff...

Embodiment 2

[0035] A method for separating iron and vanadium in vanadic acid leaching solution, its concrete steps are:

[0036] Add Na to the vanadic acid immersion solution 2 SO 3 , stirred, and carried out a reduction reaction at 30°C for 120 minutes to obtain a reduced solution;

[0037] Adding ammonia water to adjust the pH of the reduced solution to 2.5 to obtain the adjusted emulsion; then separating the solid and liquid of the adjusted emulsion to obtain the original solution and the pH-adjusted slag;

[0038] The mixed extractant prepared by volume ratio of 30% bis(2-ethylhexyl) phosphate, 5% secondary carbon primary amine and 65% sulfonated kerosene is mixed with the extraction stock solution by volume ratio of 1:1, and stirred for 15min to obtain the mixed phase ; After the mixed phase is left to stand, the phases are separated, and after a first-stage extraction, a vanadium-loaded organic phase and an iron-containing raffinate are obtained. The ion concentrations of vanadic...

Embodiment 3

[0043] A method for separating iron and vanadium in vanadic acid leaching solution, its concrete steps are:

[0044] Add Na to the vanadic acid immersion solution 2 SO 3 , stirred, and carried out a reduction reaction at 60°C for 70 minutes to obtain a reduced solution;

[0045] Add NaOH solution to adjust the pH of the reduced solution to 1.0 to obtain the adjusted emulsion; then separate the solid and liquid of the adjusted emulsion to obtain the original solution and the pH-adjusted slag;

[0046] The mixed extraction agent prepared by volume ratio of 10% bis(2-ethylhexyl) phosphate, 10% trialkyl tertiary amine and 80% sulfonated kerosene is mixed with the extraction stock solution by volume ratio of 0.5:1, stirred for 8 minutes, and mixed phase; after the mixed phase is left to stand, the phases are separated, and after five stages of extraction, the vanadium-loaded organic phase and the iron-containing raffinate are obtained. The ion concentrations of vanadic acid soak...

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Abstract

The invention discloses a method for separating ferrum and vanadium in vanadium pickle liquor. The method comprises the following steps that Na2SO3 is added into the vanadium pickle liquor, stirring is conducted, and a reduction reaction is conducted at the temperature of 30-75 DEG C for 20-120 min, so that reduction liquor is obtained; the pH value of the reduction liquor is regulated to 1.0-2.5 by adding alkali liquor, so that emulsion is obtained; solid-liquid separation is conducted on the emulsion, so that an extracted stock solution and slag are obtained; a mixed extraction agent and the extracted stock solution are mixed according to the volume ratio of (0.2-1):1, and stirring is conducted, so that a mixed phase is obtained; and standing phase splitting is conducted on the mixed phase, so that a vanadium-carrying organic phase and ferrum-containing raffinate are obtained, wherein the mixed extraction agent is prepared by mixing an acid phosphorous extraction agent, an alkaline amine extraction agent and sulfonated kerosene. According to the method for separating the ferrum and the vanadium in the vanadium pickle liquor, different extraction agents are selected to form a mixed system, and through the characteristics of the different extraction agents, the mixed system can have better extraction capacity and selectivity. The technological process is simple, agent consumption is low, and the ferrum and the vanadium in the vanadium pickle liquor can be separated efficiently.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for separating iron and vanadium in a vanadic acid immersion solution. Background technique [0002] Stone coal is the vanadium-containing resource with the largest vanadium reserves in my country, and the research on extracting vanadium from stone coal is increasing day by day. Acid leaching is widely used in vanadium extraction from stone coal due to its high vanadium leaching rate, less polluting gas emissions, and less environmental pollution. However, due to the use of high-concentration sulfuric acid for acid leaching, the leaching selectivity is poor, and a large amount of impurities such as iron and aluminum are leached together with vanadium. In order to obtain high-quality vanadium-precipitated products, it is necessary to purify and enrich the vanadium acid leaching solution. At present, ion exchange and solvent extraction are mainly used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B3/40C22B34/22
CPCC22B3/44C22B34/22C22B3/26Y02P10/20
Inventor 张一敏熊璞包申旭黄晶刘涛
Owner WUHAN UNIV OF TECH
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