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Method of recovering vanadium from non-blast furnace titanium slag

A non-blast furnace, titanium slag technology, applied in the field of direct reduction of titanium slag to recover vanadium, can solve the problems of waste of vanadium resources, low recovery rate of vanadium, limited exploration, and no substantial breakthrough has been achieved, and achieves improvement of recovery rate, inhibition of dissolution, Achieve high-efficiency dissolution effect

Inactive Publication Date: 2017-06-23
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

30% of vanadium enters blast furnace iron-making slag, which is a serious waste of vanadium resources
In recent years, a lot of research work has been carried out in the field of comprehensive recovery of vanadium-titanium magnetite, including the direct reduction technology of vanadium-titanium magnetite, etc., and the focus is on the comprehensive recovery of iron and titanium. Substantial breakthroughs have been made, but the problem of low vanadium recovery rate in the current industrial development process of vanadium-titanium magnetite cannot be effectively solved

Method used

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  • Method of recovering vanadium from non-blast furnace titanium slag

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Effect test

Embodiment 1

[0033] Get a certain direct reduction titanium slag, its main components are shown in Table 1, the proportion of the particles below 45 μm (325 mesh sieve) is finely ground to ≥90%; the finely ground titanium slag and a certain amount of titanium white waste acid Mixing and leaching, the leaching solid-to-liquid ratio (mass volume ratio) is 1:5kg / L, the leaching temperature is 130°C, the leaching time is 3h, and the oxygen partial pressure is 3atm; the mass concentration of sulfuric acid in the leaching process is 20%, and the obtained prepreg residue Send the titanium dioxide production process to produce titanium dioxide, and get the titanium dioxide waste liquid to return to use, and the obtained leaching solution uses iron powder to convert Fe 3+ Reduction; use the kerosene mixed solvent of P204 and TBP to extract, and the stripping agent is H 2 SO 4 ; Obtain vanadium-containing solution and prepare it into ammonium vanadate or vanadium pentoxide. The recovery rate of va...

Embodiment 2

[0035] Get a certain direct reduction titanium slag, its main components are shown in Table 1, the proportion of the particles below 45 μm (325 mesh sieve) is finely ground to ≥90%; the finely ground titanium slag and a certain amount of titanium white waste acid Mixing for leaching, the leaching solid-to-liquid ratio (mass volume ratio) is 1:4kg / L, the leaching temperature is 140°C, the leaching time is 3h, and the oxygen partial pressure is 3atm; the mass concentration of sulfuric acid in the leaching process is 22%, and the leaching aid is 20% Calcium fluoride; the obtained prepreg slag is sent to the titanium dioxide production process to produce titanium dioxide, and the titanium dioxide waste liquid is obtained for return use, and the obtained leachate is used to dilute Fe 3+ Reduction; use P507 and TBP kerosene mixed solvent for extraction, the stripping agent is HCl; obtain a vanadium-containing solution and prepare it into ammonium vanadate or vanadium pentoxide. The ...

Embodiment 3

[0037] Get a certain direct reduction titanium slag, its main components are shown in Table 1, the proportion of the particles below 45 μm (325 mesh sieve) is finely ground to ≥90%; the finely ground titanium slag and a certain amount of titanium white waste acid Mixing and leaching, the leaching solid-to-liquid ratio (mass volume ratio) is 1:3kg / L, leaching temperature is 150°C, leaching time is 3h, oxygen partial pressure is 3atm; the mass concentration of sulfuric acid in the leaching process is 25%; the obtained prepreg slag is sent to The titanium dioxide production process produces titanium dioxide, and the obtained titanium dioxide waste liquid is returned to use, and the obtained leaching solution uses sodium sulfite to dilute Fe 3+ Reduction; use the kerosene mixed solvent of P204 and TBP to extract, and the stripping agent is H 2 SO 4 ; Obtain vanadium-containing solution and prepare it into ammonium vanadate or vanadium pentoxide. The recovery rate of vanadium in ...

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Abstract

The invention discloses a method of recovering vanadium from non-blast furnace titanium slag, and belongs to the technical field of vanadium recovery. According to the method, non-blast furnace titanium slag of vanadium-titanium-iron concentrate is taken as the raw material; the non-blast furnace titanium slag is pre-soaked in waste acids generated during the titanium dioxide production process; during the pre-soaking process, the behavior of vanadium and titanium is effectively controlled; the leaching of vanadium in magnesium aluminum silicate is enhanced; the dissolution of TiO2 in non-blast furnace titanium slag and hydrolysis of TiO2 in titanium dioxide waste acids are inhibited, and the stability of vanadium in waste acids is maintained. Titanium dioxide is prepared from pre-soaked titanium slag through a conventional sulfuric acid method. The pre-soaking solution is reduced and then subjected to an extraction-reverse extraction technology to obtain a vanadium-containing solution so as to prepare a vanadium product. The characteristics of non-blast furnace titanium slag are deeply studied, the titanium dioxide production method (sulfuric acid) is used, the vanadium is comprehensively recovered on the basis that the titanium dioxide waste acids are cyclically utilized, the vanadium (impurity in titanium dioxide production) is recovered and purified, the technology is simple and easy, the vanadium recovery rate is high, high quality titanium dioxide is produced at the same time, and thus the method has a good popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of vanadium resource recovery, and relates to a process for recovering vanadium from slag, in particular to a new method for recovering vanadium by directly reducing titanium slag in a non-blast furnace smelting process of vanadium-titanium magnetite. Background technique [0002] Vanadium is widely used, and it is an indispensable and important element in industrial fields such as steel, non-ferrous metals, chemicals, alloys, superconducting materials, and automobiles. Adding a certain amount of vanadium to steel, non-ferrous metals and alloys can change their microstructure, greatly improve the wear resistance and red hardness of steel, reduce the weight of materials, and prolong the service life; in the chemical industry, vanadium catalysts are manufactured with low price and high performance. Stable and strong anti-poisoning performance; at the same time, the colorful colors of vanadium compounds can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22C01G23/053
CPCC01G23/053C22B7/007C22B34/22Y02P10/20
Inventor 赵磊蒋训雄王政林江顺王爱平冯爱玲尹一男谢铿
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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