Method for extracting vanadium from vanadium-titanium magnetite concentrates

A vanadium-titanium magnetite concentrate and iron-vanadium technology, applied in the field of hydrometallurgy, can solve the problems of low vanadium recovery rate, high energy consumption, environmental pollution, etc., and achieve the effect of high vanadium recovery rate, low energy consumption and high efficiency

Active Publication Date: 2013-09-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a clean and efficient method for extracting vanadium from vanadium-titanium magnetite concentrate, which has the disadvantages of low vanadium recovery rate, high energy consumpti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] (1) The main components of raw material vanadium-titanium magnetite concentrate: the mass content of TFe is 42.97%, TiO 2 The mass content of 28.74%, V 2 O 5 The mass content is 1.23%, the vanadium-titanium magnetite concentrate is ground to -200 mesh 80%;

[0028] (2) Mix the ground vanadium-titanium magnetite concentrate with 10% hydrochloric acid, with a liquid-to-solid ratio of 10:1, and leaching at 150°C for 5 hours to obtain an acid leaching solution;

[0029] (3) The acid leaching solution obtained in step (2) is calcined at 300°C to obtain iron-vanadium solid material and hydrochloric acid, and the hydrochloric acid is returned to the leaching of vanadium-titanium magnetite concentrate;

[0030] (4) Put the iron-vanadium solid material obtained in step (3) into a sodium hydroxide solution with a mass concentration of 20%, with a liquid-to-solid ratio of 20:1, keep it warm and stir for 5 hours at a temperature of 150°C, filter and wash To obtain the ma...

Example Embodiment

[0033] Example 2

[0034] (1) The main components of raw material vanadium-titanium magnetite concentrate: the mass content of TFe is 43.15%, TiO 2 The mass content is 25.14%, V 2 O 5 The mass content is 1.05%, and the vanadium-titanium magnetite concentrate is ground to -200 mesh 80%;

[0035] (2) Mix the finely ground vanadium-titanium magnetite concentrate with 25% hydrochloric acid with a liquid-to-solid ratio of 5:1 and leaching at 120°C for 3 hours to obtain an acid leaching solution;

[0036] (3) The acid leaching solution obtained in step (2) is calcined at 500°C to obtain iron-vanadium solid material and hydrochloric acid, and the hydrochloric acid is returned to the leaching of vanadium-titanium magnetite concentrate;

[0037] (4) Put the iron-vanadium solid material obtained in step (3) into a sodium hydroxide solution with a mass concentration of 50%, with a liquid-to-solid ratio of 10:1, keep it warm and stir for 3 hours at a temperature of 130°C, filter and wash To obtai...

Example Embodiment

[0040] Example 3

[0041] (1) The main components of raw material vanadium-titanium magnetite concentrate: the mass content of TFe is 40.15%, TiO 2 The mass content is 24.35%, V 2 O 5 The mass content is 0.95%, and the vanadium-titanium magnetite concentrate is ground to -200 mesh 80%;

[0042] (2) Mix the ground vanadium-titanium magnetite concentrate with 36% hydrochloric acid with a liquid-to-solid ratio of 1:1 and leaching at 100°C for 1 hour to obtain an acid leaching solution;

[0043] (3) The acid leaching solution obtained in step (2) is calcined at 800°C to obtain iron-vanadium solid material and hydrochloric acid, and the hydrochloric acid is returned to the leaching of vanadium-titanium magnetite concentrate;

[0044] (4) Put the iron-vanadium solid material obtained in step (3) into a sodium hydroxide solution with a mass concentration of 80%, with a liquid-to-solid ratio of 0.5:1, keep it warm and stir for 0.5 hours at a temperature of 160°C, filter and wash To obtain the...

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Abstract

The invention belongs to the field of hydrometallurgy and in particular relates to a method for extracting vanadium from vanadium-titanium magnetite concentrates. The method comprises the following steps of: 1) carrying out acid dissolution and leaching on vanadium-titanium magnetite concentrates and hydrochloric acid at 100-150 DEG C, and filtering the solution to obtain an acid leaching solution; 2) calcining the acid leaching solution obtained in the step 1) to obtain an iron-vanadium solid material and hydrochloric acid; 3) putting the iron-vanadium solid material obtained in the step 2) in an alkali solution, and stirring, filtering and washing to obtain an iron-containing solid material and a vanadium-containing alkali solution; and 4) evaporating and concentrating the vanadium-containing alkali solution obtained in the step 3), then repeating the step 3), and carrying out cooling crystallization to extract a vanadate crystal when the concentration of vanadate in the alkali solution is 10-30g/L. The method has the advantages that the problems of high energy consumption caused by multiple high-temperature roasting in a method for extracting vanadium through sodium (calcium) roasting, three-waste pollution caused in the roasting processes and the like are avoided; and the recovery rate of vanadium is greatly increased.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, in particular, the invention relates to a method for extracting vanadium from vanadium-titanium magnetite concentrate. Background technique [0002] Vanadium-titanium magnetite is a major characteristic polymetallic mineral resource in my country, with huge reserves, and multi-metal symbiosis such as vanadium, titanium, iron, chromium, etc., and the comprehensive utilization value of resources is very high. my country has proven reserves of more than 10 billion tons, and prospective reserves of more than 30 billion tons, mainly distributed in Panxi area of ​​Sichuan, Chengde of Hebei and Chaoyang area of ​​Liaoning. Panxi is the most abundant area of ​​vanadium and titanium resources in my country. The proven reserves of vanadium-titanium magnetite are more than 10 billion tons, and the reserved reserves are 6.73 billion tons, of which vanadium (V 2 o 5 ) 14.75 million tons, titanium (TiO 2 ) 59...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/10C22B3/20C22B3/44
Inventor 王丽娜陈德胜齐涛胡国平赵宏欣仲斌年赵龙胜
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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