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Method for preparing crystal form ferric vanadate from vanadium-containing acid solution through pH slow release method

A technology of iron vanadate and vanadic acid, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problems of complex composition of iron vanadate, inability to realize the separation of iron vanadium, etc., and achieve easy industrialization promotion, easy control, Easy to filter and wash

Pending Publication Date: 2021-11-19
QINGDAO HUICHENG PETROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can obtain ferric vanadate precipitation, but for the acid solution with complex composition, the composition of ferric vanadate obtained by this method is complex, and the separation of other impurities of ferrovanadium cannot be realized

Method used

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  • Method for preparing crystal form ferric vanadate from vanadium-containing acid solution through pH slow release method
  • Method for preparing crystal form ferric vanadate from vanadium-containing acid solution through pH slow release method
  • Method for preparing crystal form ferric vanadate from vanadium-containing acid solution through pH slow release method

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Effect test

Embodiment 1

[0048] This embodiment provides a method for preparing crystalline ferric vanadate by a pH slow-release method in a vanadium-containing acid solution, wherein the vanadium-containing acid solution is a stone coal acid leaching solution, wherein the main element concentration is V1.89g / L, Fe 6.97 g / L, Al 12g / L, described method comprises the steps:

[0049] (1) Control the temperature of the pickling solution at 40°C, put 100mL of petroleum coke gasification ash acid solution in the reactor, add sodium chlorate and stir for oxidation for 15 minutes, wherein the amount of sodium chlorate is 1.0 times the theoretical amount of oxidant, The resulting solution was yellow;

[0050] (2) Add sodium hydroxide solution to the above-mentioned oxidized solution to quickly adjust the pH to 1.4, and the adjustment time is 5 minutes;

[0051] (3) adding a crystal form control agent, 0.02% magnesium sulfate solution, to the above solution;

[0052] (4) Slowly adjust the pH to 2.5 with magne...

Embodiment 2

[0057] This embodiment provides a kind of method that contains vanadium acid solution pH sustained release method to prepare crystalline form ferric vanadate, described vanadium-containing acid solution is vanadium-containing tailings acid dipping solution, wherein main element concentration is V 2.45g / L, Fe 2.57g / L, Al 1g / L, described method comprises the steps:

[0058] (1) Control the temperature of the acid dipping solution at 20°C, put 100mL of petroleum coke gasification ash acid solution in the reactor, add sodium chlorate and stir for oxidation for 60 minutes, wherein the amount of sodium chlorate is 1.1 times the theoretical amount of oxidant, The resulting solution was yellow;

[0059] (2) Add sodium hydroxide solution to the above-mentioned oxidized solution to quickly adjust the pH to 1.0, and the adjustment time is 25 minutes;

[0060] (3) Add crystal form control agent, 0.05% magnesium chloride solution to the above solution;

[0061] (4) Slowly adjust the pH t...

Embodiment 3

[0066] The present embodiment provides a kind of method that contains vanadium acid liquid pH sustained release method to prepare crystalline form ferric vanadate, described containing vanadium acid liquid is petroleum coke hydrogen ash slag pickling liquid, and wherein main element concentration is V 3.25g / L, Fe 8.31g / L, Al 10g / L, described method comprises the steps:

[0067] (1) Control the temperature of the acid dipping solution at 50°C, put 100mL of petroleum coke gasification ash acid solution in the reactor, add sodium chlorate and stir for oxidation for 10 minutes, wherein the amount of sodium chlorate is 1.2 times the theoretical amount of oxidant, The resulting solution was yellow;

[0068] (2) Add sodium hydroxide solution to the above-mentioned oxidized solution to quickly adjust the pH to 1.6, and the adjustment time is 20 minutes;

[0069] (3) Add crystal form control agent, 0.04% magnesium nitrate solution to the above solution;

[0070] (4) Slowly adjust th...

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Abstract

The invention discloses a method for preparing crystal-form ferric vanadate from a vanadium-containing acid solution through a pH slow release method, and relates to the technical field of wet-process vanadium extraction metallurgy. The method comprises the following steps: carrying out oxidation treatment on a vanadium-containing acid solution, adopting a segmented pH adjustment method, rapidly adjusting the pH value to 0.8-1.8, adding a crystal form control agent into the solution, then slowly adjusting the pH value to 2-3 by using a pH slow-release agent, placing the slurry with the adjusted pH value into a water bath of 80-100 DEG C, carrying out constant-temperature slow-speed stirring aging, carrying out solid-liquid separation on the aged slurry, and drying the solid to obtain the crystal form ferric vanadate. The method can realize treatment of the vanadium-containing acid liquid and recovery of vanadium, and has the advantages of short production flow, high vanadium precipitation rate and easiness in filtering and washing of precipitates.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and vanadium chemical industry, and relates to a method for preparing crystalline ferric vanadate by a pH slow-release method of a vanadium-containing acid solution. Background technique [0002] For the resource utilization of vanadium-containing tailings and vanadium in minerals, acid leaching process is often used to leach the vanadium into the solution, and then carry out subsequent treatment. During the acid leaching process, a large number of accompanying elements including vanadium are also leached into the solution, among which iron is the most important impurity ion. [0003] At present, the recovery methods of vanadium in acidic vanadium-containing solution mainly include solvent extraction method, ammonium salt precipitation method and calcium salt precipitation method, iron salt vanadium precipitation method and ion exchange method. Due to the complex composition of vanadium-c...

Claims

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Application Information

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IPC IPC(8): C01G49/00
CPCC01G49/00
Inventor 张立萍张贝贝李大鹏赵洁郭明于晓倩张新功
Owner QINGDAO HUICHENG PETROCHEM TECH
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