Method for extracting vanadium from acid-leaching vanadium solution

A technology of vanadium liquid and acid leaching, which is applied in the field of vanadium extraction by acid leaching vanadium liquid, can solve problems such as wall sticking, complex synthesis process of phosphorus removal agent and impurity removal process, and no one-time removal problem, so as to achieve small vanadium loss, The effect of eliminating the calcination deamination process, easy subsequent treatment or resource utilization

Active Publication Date: 2016-10-12
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before the precipitation of vanadium, it is necessary to remove impurities in the acid leaching vanadium solution in two steps, namely (NH4) 2 CO 3 In addition to Ca, Mg, by SiO 2 、TiO 2 , CaO, MgO, Al 2 o 3 The glass phase synthesized at high temperature removes Si and P, and the synthesis process and impurity removal process of phosphorus removal agent are relatively complicated
[0007] So far, for the calcification vanadium extraction process, there is no one-time removal of impurities Ca, Mg, Al, and Si in the acid leaching vanadium solution, while avoiding the wall sticking during the vanadium precipitation process, and obtaining a grade higher than 98% of V 2 o 5 Product-related research reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 100ml of acid leaching vanadium solution, wherein c(V)=10.15g / L, c(P)=0.69g / L, pH=4.89.

[0027] First, adopt the disclosed technical scheme of CN104831069A to carry out impurity removal to acid leaching vanadium liquid, remove Ca, Mg, Al, Si impurity in acid leaching vanadium liquid, its specific operation method is: get 5ml impurity removal agent (purchased from Taixing City Dayu The water agent of DY598 polycarboxylate superplasticizer of Building Material Technology Development Co., Ltd., the content is 40wt.%, the density is 1.05g / mL), and 100ml of acid immersion vanadium solution is added to the constant temperature water bath, and stirred at room temperature for 60min , the stirring speed is 300r / min. Leave standstill 2h after stirring finishes, filter, wash filter residue 2 times with a little tap water, obtain the pickling vanadium solution after impurity removal, wherein c(Ca)=0.05g / L, c(Mg)=0.008g / L, c( Al)=0.002g / L, c(Si)=0.011g / L, and the vanadium loss is ...

Embodiment 2

[0031] Pickling vanadium solution 500ml, wherein c(V)=30.45g / L, c(P)=0.02g / L, pH=3.52.

[0032] First, adopt the disclosed technical scheme of CN104831069A to carry out impurity removal to acid leaching vanadium liquid, remove Ca, Mg, Al, Si impurity in acid leaching vanadium liquid, its specific operation method is: get 3.8ml impurity removal agent (purchased from Suzhou City Xingbang Chemical Building Materials Co., Ltd. SM-1 type polycarboxylate water reducer water agent, the content is 30wt.%, the density is 1.02g / mL), and 500ml acid immersion vanadium solution is added to the constant temperature water bath, 40 ℃ Stir for 30min at a stirring speed of 500r / min. Leave standstill 6h after stirring finishes, filter, wash filter residue 2 times with a little tap water, obtain the pickling vanadium solution after impurity removal, wherein c(Ca)=0.039g / L, c(Mg)=0.007g / L, c( Al)=0.005g / L, c(Si)=0.013g / L, vanadium loss is 0.15%.

[0033] Then carry out ammonia-free vanadium prec...

Embodiment 3

[0036] Pickling vanadium solution 2000ml, wherein c(V)=49.65g / L, c(P)=0.30g / L, pH=2.68.

[0037] First, adopt the disclosed technical scheme of CN104831069A to carry out impurity removal to acid leaching vanadium liquid, remove Ca, Mg, Al, Si impurity in acid leaching vanadium liquid, its specific operation method is: take 18.8ml impurity removal agent (purchased from Xiangyang State The water agent of GH-1 polycarboxylate superplasticizer produced by Hong Fine Chemical Co., Ltd., with a content of 20wt.%, and a density of 1g / mL), was added to a constant temperature water bath together with 2000ml of acid dipping vanadium solution, and the Stir for 15min, the stirring speed is 150r / min. Leave standstill 1h after stirring finishes, filter, wash filter residue 2 times with a little tap water, obtain the acid leaching vanadium solution after impurity removal, wherein c(Ca)=0.015g / L, c(Mg)=0.017g / L, c( Al)=0.003g / L, c(Si)=0.016g / L, vanadium loss is 0.12%.

[0038] Then carry out...

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Abstract

The invention discloses a method for extracting vanadium from an acid-leaching vanadium solution. The method comprises the following steps: firstly, carrying out dust removal on the acid-leaching vanadium solution by adopting the technical scheme disclosed in CN104831069A; then, carrying out ammonia-free vanadium precipitation on the acid-leaching vanadium solution subjected to dust removal by utilizing sulfuric acid to obtain polyvanadate precipitates; and dehydrating and drying the polyvanadate precipitates to obtain powdered V2O5. According to the method, for the acid-leaching vanadium solution obtained by vanadium slag calcifying-roasting and diluted acid leaching, after Ca, Mg, Al and Si are removed by a single impurity removal agent, an ammonia-free vanadium precipitation method is adopted to obtain the polyvanadate precipitates; and roasting is not needed after filtering, and powdered V2O5 with grade higher than 98% can be obtained by simple drying. Vanadium loss of an impurity removal process is lower than 0.3%; a vanadium extracting process is simple, an ammonium salt is not introduced, a follow-up roasting and ammonia-removal process is avoided, wall sticking is avoided in a vanadium precipitation process, and a vanadium precipitation rate can be as high as 99%.

Description

technical field [0001] Embodiments of the present invention relate to the field of vanadium oxide extraction, and more specifically, embodiments of the present invention relate to a method for extracting vanadium by acid leaching vanadium solution. Background technique [0002] Vanadium slag is the main raw material for extracting vanadium. The current industrialized processes mainly include sodium roasting-water leaching vanadium extraction and calcification roasting-acid leaching vanadium extraction. The additives used in sodium roasting are NaCl, Na 2 SO 4 、Na 2 CO 3 and NaNO 3 One or a combination of several in the roasting process produces HCl, Cl 2 , SO 2 and other harmful gases; the process has strict requirements on the content of CaO in the raw materials and the content of impurities mainly P in the vanadium precipitation solution; the Na content in the vanadium precipitation wastewater and vanadium extraction tailings is high, and subsequent wastewater treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/46C22B34/22
CPCC22B3/46C22B34/22Y02P10/20
Inventor 蒋霖
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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