Removing method for phosphorus in acid vanadium leaching liquid

A leachate and acidic technology, applied in the field of dephosphorization treatment, can solve the problems of complex process, unstable phosphorus removal effect, low phosphorus removal efficiency, etc., and achieve the effect of simple process, stable phosphorus removal effect and high phosphorus removal efficiency

Inactive Publication Date: 2018-06-29
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing phosphorus removal methods for acidic vanadium leachate have disadvantages such as complicated process, low phosphorus removal efficiency and unstable phosphorus removal effect.

Method used

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  • Removing method for phosphorus in acid vanadium leaching liquid

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Comparison scheme
Effect test

Embodiment 1

[0033] A method for removing phosphorus in an acidic vanadium leaching solution, characterized in that it comprises the following steps:

[0034] 1) placing the acidic vanadium leaching solution in a container;

[0035] The pH value of described acidic vanadium leaching solution is 2.5, and wherein the concentration of phosphorus is 0.723g / L;

[0036] 2) Add oxidant A to the acidic vanadium leaching solution at 30°C, stir, and obtain mixed liquid A after 0.1 hour;

[0037] The oxidizing agent A is NaClO;

[0038] The mol ratio of described oxidizing agent A and phosphorus in the acidic vanadium leaching solution is 1: 1;

[0039] 3) Add a composite dephosphorization agent to the mixed liquid A obtained in step 2) at 30°C, stir, and obtain mixed liquid B after 0.1 hour;

[0040] The composite phosphorus removal agent includes component B and component C;

[0041] The molar ratio of the B component to phosphorus in the acidic vanadium leaching solution is 0.1:1;

[0042] Th...

Embodiment 2

[0050] A method for removing phosphorus in an acidic vanadium leaching solution, characterized in that it comprises the following steps:

[0051] 1) placing the acidic vanadium leaching solution in a container;

[0052] The pH value of described acidic vanadium leaching solution is 2.5, and wherein the concentration of phosphorus is 1.294g / L;

[0053] 2) At 20°C, use 0.1M NaOH solution to adjust the pH value of the acidic vanadium leaching solution to 3.0, add oxidant A to the acidic vanadium leaching solution, stir, and obtain mixed liquid A after 0.5 hours;

[0054] The oxidizing agent A is HClO;

[0055] The mol ratio of described oxidant A and phosphorus in the acid vanadium leaching solution is 5: 1;

[0056] 3) Add a composite dephosphorization agent to the mixed liquid A obtained in step 2) at 50°C, stir, and obtain mixed liquid B after 0.5 hours;

[0057] The composite phosphorus removal agent includes component B and component C;

[0058] The molar ratio of the phos...

Embodiment 3

[0066] A method for removing phosphorus in an acidic vanadium leaching solution, characterized in that it comprises the following steps:

[0067] 1) placing the acidic vanadium leaching solution in a container;

[0068] The pH value of described acidic vanadium leaching solution is 3.0, and wherein the concentration of phosphorus is 0.821g / L;

[0069] 2) At 60°C, use 0.1M NaOH solution to adjust the pH value of the acid vanadium leach solution to 4.5, add oxidant A to the acid vanadium leach solution, stir, and obtain mixed liquid A after 1 hour;

[0070] The oxidizing agent A is H 2 o 2 ;

[0071] The mol ratio of described oxidizing agent A and phosphorus in the acidic vanadium leaching solution is 10: 1;

[0072] 3) Add the composite dephosphorization agent to the mixed liquid A obtained in step 2) at 20°C, stir, and obtain the mixed liquid B after 1 hour;

[0073] The composite phosphorus removal agent includes component B and component C;

[0074] The molar ratio of...

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Abstract

The invention discloses a removing method for phosphorus in acid vanadium leaching liquid. The pH value of the acid vanadium leaching liquid is 2.5-4.0; and the concentration of phosphorus is 0.3-1.5g/L. In the method, an oxidizing agent A is used for oxidizing the acid vanadium leaching liquid; A is one of NaClO, HClO, H2O2, KMnO4 or (NH4)2S2O8; a phosphorus removing agent is a composite phosphorus removing agent, and mainly consists of B and C components; the B component is one of [Fe(OH)n(SO4)m]q, FeSO4 and Fe2(SO4)3, wherein n is not more than 2 and not less than 0.5, m is not more than 3and not less than 1, and q is not more than 100000 and not less than 10; the C component is one of Al2(SO4)3, MgO, CaO, ZrSO4 and PbSO4; the mole ratio of the B component and the C component to phosphorus in the acid vanadium leaching liquid is 0.1-3: 1; and the mole ratio of the C component to phosphorus in the acid vanadium leaching liquid is 0.1-3: 1. The method removes phosphorus through adding of the composite phosphorus removing agent after oxidation by adding the oxidizing agent in the acid vanadium leaching liquid. Compared with the prior art, the removing method has the advantages ofsimple process, high phosphorus removing efficiency and stable phosphorus removing effect.

Description

technical field [0001] The invention relates to the field of dephosphorization treatment, in particular to a method for removing phosphorus in an acidic vanadium leaching solution. Background technique [0002] Vanadium is a strategic resource, widely used in various fields, of which more than 90% of vanadium is used in steel smelting, it can significantly improve the hardness, strength, wear resistance and ductility of steel, and improve the cutting of steel performance. But there is no vanadium-enriched ore in the world, so converter vanadium slag is mostly used as raw material to extract vanadium. [0003] The "calcification roasting-acid leaching-precipitation-calcination" process is a new type of clean vanadium extraction process. However, during the acid leaching process, other impurities also enter the acidic vanadium leach solution while the vanadium is being leached. Under acidic conditions, especially phosphorus will combine with vanadium in the pickling solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B34/22
CPCC22B3/44C22B34/22Y02P10/20
Inventor 谢昭明张也可刘作华陶长元杜军范兴刘仁龙吴丙山孔令峰唐金晶何文艺邓丽邓容锐
Owner CHONGQING UNIV
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