Method for reducing titanium content in vanadium-titanium magnetite concentrate

A vanadium-titanium magnetite concentrate and titanium content technology, applied in the field of metallurgy, can solve the problems of low utilization rate of smelting blast furnaces, waste of titanium resources, and inability to economically recycle, and achieve the goal of improving the utilization factor of blast furnaces, reducing operating costs, and reducing environmental pollution Effect

Active Publication Date: 2021-09-03
四川省有色矿冶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, about 57% of titanium in ilmenite exists in titanomagnetite (nFeTiO 3 ·mFe 3 o 4 ), about 40% occur in ilmenite (FeTiO 3 ), the characteristics of mineral occurrence state determine that the separation of titanium and iron cannot be realized from the source
Due to the complex composition and special properties of vanadium-titanium magnetite ore, the comprehensive utilization of this kind of ore is a difficult problem that has not been completely solved in the world. High-efficiency separation of titanium and iron at the source of vanadium-titanium magnetite, resulting in low iron concentrate grade after physical beneficiation of vanadium-titanium magnetite ore, and TiO in iron concentrate 2 Almost all of it enters the blast furnace slag to form a glass body (TiO 2 content of about 20 to 24%), resulting in the loss of activity of titanium dioxide and cannot be economically recovered
In addition, due to the high content of S, Si, Al and other impurities in the iron concentrate, the utilization rate of the smelting blast furnace is low, the energy consumption is large, the titanium resource is wasted, and the amount of slag is large and the environment is polluted seriously.
[0003] Traditional beneficiation technology is difficult to remove titanium and other impurities in vanadium-titanium magnetite concentrate with complex occurrence state. Therefore, a large amount of rich ore resources from abroad are imported domestically, and the impurity content in the blast furnace is reduced by ore blending before smelting, especially TiO 2 content of
Although this method temporarily solves the TiO 2 The problem of excessive content finally increases the production cost virtually, and at the same time causes some titanium resources not to be rationally utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for reducing titanium content in vanadium-titanium magnetite concentrate, comprising the steps of:

[0031] S1, preparing mixed acid composite leaching agent;

[0032] 2 parts by weight of formic acid, 1.6 parts by weight of acetic acid, 5 parts by weight of phthalic acid and 5 parts by weight of iminooxalic acid were mixed and heated and stirred at a heating temperature of 40°C and a stirring time of 10 minutes to obtain an organic acid Mixed acid; then keep warm at 40°C. During the heat preservation process, add 45 parts by weight of sulfuric acid and 5 parts by weight of ammonium bifluoride to the organic acid mixed acid to obtain the mixed acid composite leaching agent after 30 minutes of heat preservation.

[0033] S2. Mix the mineral with the mixed acid composite leaching agent obtained in step S1 in a weight ratio of 1:5, and perform a selective leaching reaction. The time for the selective leaching reaction is 17 hours, and the temperature is 80° C.;

...

Embodiment 2

[0037] A method for reducing titanium content in vanadium-titanium magnetite concentrate, comprising the steps of:

[0038] S1, preparing mixed acid composite leaching agent;

[0039] 1.8 parts by weight of formic acid, 1 part by weight of acetic acid, 3.6 parts by weight of phthalic acid and 3.6 parts by weight of iminooxalic acid were mixed and heated and stirred at a heating temperature of 40°C and a stirring time of 10 minutes to obtain an organic acid Mixed acid; then keep warm at 40°C. During the heat preservation process, add 40 parts by weight of sulfuric acid and 2.7 parts by weight of ammonium bifluoride to the organic acid mixed acid, and obtain the mixed acid composite leaching agent after being kept warm for 30 minutes.

[0040] S2. Mix the mineral with the mixed acid composite leaching agent obtained in step S1 in a weight ratio of 1:1, and perform a selective leaching reaction. The time of the selective leaching reaction is 0.5h, and the temperature is 70°C;

...

Embodiment 3

[0044]A method for reducing titanium content in vanadium-titanium magnetite concentrate, comprising the steps of:

[0045] S1, preparing mixed acid composite leaching agent;

[0046] 2 parts by weight of formic acid, 2 parts by weight of acetic acid, 6 parts by weight of phthalic acid and 6 parts by weight of iminooxalic acid were mixed and heated and stirred at a heating temperature of 40°C and a stirring time of 10 minutes to obtain an organic acid Mixed acid; then keep warm at 40°C. During the heat preservation process, add 50 parts by weight of sulfuric acid and 7.3 parts by weight of ammonium bifluoride to the organic acid mixed acid, and obtain the mixed acid composite leaching agent after 30 minutes of heat preservation.

[0047] S2. Mix the mineral with the mixed acid composite leaching agent obtained in step S1 at a weight ratio of 1:10, and perform a selective leaching reaction. The time for the selective leaching reaction is 720 hours, and the temperature is 90° C.;...

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Abstract

The invention provides a method for reducing the titanium content in vanadium-titanium magnetite concentrate. The method comprises the following steps: S1, preparing a mixed acid composite leaching agent, S2, mixing minerals with the mixed acid composite leaching agent obtained in the step S1, and carrying out selective leaching reaction, S3, carrying out magnetic separation on the mixture obtained in the step S2 to obtain the vanadium-titanium magnetite concentrate, carrying out solid-liquid separation on residual tailing pulp, and returning the obtained filtrate to the mixed acid composite leaching agent in the step S2 for cyclic utilization. According to the method for reducing the titanium content in the vanadium-titanium magnetite concentrate, the mixed acid composite leaching agent is prepared and used for the leaching reaction of the vanadium-titanium magnetite concentrate, so that efficient separation of impurities such as titanium, silicon and aluminum in the vanadium-titanium magnetite concentrate from iron can be effectively achieved, the utilization coefficient of a blast furnace is increased, the discharge amount of blast furnace slag is reduced, the blast furnace operation cost is reduced, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for reducing the titanium content in vanadium-titanium magnetite concentrate. Background technique [0002] Vanadium-titanium magnetite is a compound ore of multi-metal elements, mainly symbiotic magnetite containing iron, vanadium and titanium as the main elements. Vanadium-titanium magnetite concentrate is one of the main products obtained after beneficiation of vanadium-titanium-magnetite, in which vanadium exists in titanium-magnetite in the form of isomorphism to replace high-valent ions. Ilmenite forms a complex with ilmenite spar, ilmenite, and aluminum-magnesium spinel. Generally, about 57% of titanium in ilmenite exists in titanomagnetite (nFeTiO 3 ·mFe 3 o 4 ), about 40% occur in ilmenite (FeTiO 3 ), the characteristics of mineral occurrence state determine that the separation of titanium and iron cannot be realized from the source. Due to the complex ...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B34/12B03C1/30
CPCC22B3/04C22B34/124C22B34/1245C22B34/125Y02P10/20
Inventor 殷志刚曾伟康陈忠华林一明官长平
Owner 四川省有色矿冶科技有限公司
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