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Method for selectively reducing vanadium-titanium content in vanadium-titanium magnetite concentrate by ammonium ammonia oxidation leaching system

A vanadium-titanium-magnetite concentrate and oxidation system technology, applied in the metallurgical field, can solve the problems of high cost, difficult filtration, environmental pollution, etc., and achieve the effects of increasing iron content, good treatment effect, and low raw material requirements

Active Publication Date: 2022-04-05
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

[0003] For the current conventional alkaline leaching process, the sodium / potassium silicate and sodium / potassium aluminate formed in the alkaline leaching process are relatively viscous, which makes filtration very difficult, and the process also involves acid washing and desliming of the filter cake. etc., acid-base neutralization will generate a large amount of salt. It can be seen that this process still has the disadvantages of high energy consumption and high cost, and it is difficult to popularize and apply it in industrial production; for the roasting-alkali leaching process, there are still high production costs. , process plant, difficulty in industrialization and other disadvantages, especially the use of a large amount of sodium hydroxide or potassium hydroxide as alkali, the resulting soluble silicate solution has high viscosity and low rate, and it is difficult to carry out industrial tests; for physical separation process is a method to gradually increase the grade of iron ore concentrate, which has the disadvantage of taking a long time; for the roasting-magnetic separation process, this method can effectively reduce the impurity content in the vanadium-titanium magnetite concentrate without ore blending, but there are roasting High energy consumption, long process, environmental pollution and other issues make it difficult to further develop industrial production
[0004] In summary, although a lot of research has been done on the impurity removal methods of vanadium-titanium magnetite concentrate, there are still problems such as high energy consumption, high cost, and unfriendly to the environment.

Method used

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  • Method for selectively reducing vanadium-titanium content in vanadium-titanium magnetite concentrate by ammonium ammonia oxidation leaching system
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Embodiment 1

[0033] A method for selectively reducing vanadium-titanium content in vanadium-titanium magnetite concentrate by ammonium ammonia oxidation leaching system, comprising the steps of:

[0034] S1, preparing ammonium ammonia system composite leaching agent;

[0035] Based on 100 parts by weight of water, first heat the water to 35°C and keep it warm, then add 25 parts by weight of ammonium polymethacrylate to the water, stir until the ammonium polymethacrylate is completely dissolved, then add 55 parts by weight A concentration of 30 wt% of ammonia and 5 parts by weight of hydrogen peroxide of 20 wt% were stirred and naturally cooled.

[0036] S2. After the mineral is ground, it is mixed with the ammonium ammonia system composite leaching agent obtained in step S1 at a weight ratio of 1:5 to carry out a selective alkaline hydrolysis leaching reaction. The reaction temperature is 80° C., and the reaction time is 5.5 hours to obtain a reacted mixture;

[0037] Mineral TFe content ...

Embodiment 2

[0040] A method for selectively reducing vanadium-titanium content in vanadium-titanium magnetite concentrate by ammonium ammonia oxidation leaching system, comprising the steps of:

[0041] S1, preparing ammonium ammonia system composite leaching agent;

[0042] Based on 100 parts by weight of water, first heat the water to 30°C and keep it warm, then add 20 parts by weight of ammonium polymethacrylate to the water, stir until the ammonium polymethacrylate is completely dissolved, then add 50 parts by weight A concentration of 25wt% ammonia and 0.5 parts by weight of 20wt% hydrogen peroxide were stirred and naturally cooled.

[0043] S2. Grinding the minerals and mixing them with the ammonium ammonia system composite leaching agent obtained in step S1 in a weight ratio of 1:1 to carry out selective alkaline hydrolysis leaching reaction, the reaction temperature is 70° C., and the reaction time is 5 hours to obtain the reacted mixture;

[0044] The mineral has a TFe content o...

Embodiment 3

[0047] A method for selectively reducing vanadium-titanium content in vanadium-titanium magnetite concentrate by ammonium ammonia oxidation leaching system, comprising the steps of:

[0048] S1, preparing ammonium ammonia system composite leaching agent;

[0049]Based on 100 parts by weight of water, first heat the water to 40°C and keep it warm, then add 30 parts by weight of ammonium polymethacrylate to the water, stir until the ammonium polymethacrylate is completely dissolved, then add 60 parts by weight A concentration of 35 wt% ammonia water and 10 parts by weight of hydrogen peroxide with a concentration of 20 wt% were stirred and cooled naturally.

[0050] S2. Grinding the minerals and mixing them with the ammonium ammonia system composite leaching agent obtained in step S1 at a weight ratio of 1:10 to carry out selective alkaline hydrolysis leaching reaction, the reaction temperature is 90° C., and the reaction time is 6 hours to obtain the reacted mixture;

[0051] ...

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Abstract

The invention provides a method for selectively reducing the content of vanadium and titanium in vanadium-titanium magnetite concentrate with ammonium ammonia oxidative leaching system, comprising the following steps: S1, preparing a compound leaching agent of ammonium ammonia system; S2, grinding the minerals and step S1 The obtained ammonium ammonia system composite leaching agent is mixed for selective alkaline hydrolysis leaching reaction to obtain the reacted mixture; S3, the mixture obtained in step S2 is subjected to magnetic separation to obtain vanadium-titanium magnetite concentrate and tailings pulp, and the tailings pulp is solid-liquid The filtrate is separated, and the filtrate is returned to step S2 for recycling; the method provided by the present invention can effectively transfer impurities such as vanadium and titanium in the ore to the liquid phase, while iron is retained in the solid phase, thereby realizing iron and titanium. High-efficiency separation of impurities such as vanadium and titanium; finally, the separation of them and gangue minerals is achieved by magnetic separation. The invention has simple operation, low requirements for raw materials, low operating costs, and good treatment effect, and can fully improve the concentration of iron in vanadium-titanium magnetite concentrate. content, to provide high-quality iron concentrate for blast furnace smelting.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for selectively reducing the content of vanadium and titanium in a vanadium-titanium magnetite concentrate by an ammonium ammonia oxidation leaching system. Background technique [0002] Vanadium-titanium magnetite is a compound ore of multi-metal elements. It mainly contains iron, vanadium and titanium as the main elements of symbiotic magnetite. There are many kinds of impurities in the mineral, which are not easy to remove. At present, there are several methods for removing impurities from vanadium-titanium magnetite: alkaline leaching process, roasting-alkali leaching process, physical separation process and roasting-magnetic separation process. [0003] For the current conventional alkaline leaching process, the sodium / potassium silicate and sodium / potassium aluminate formed in the alkaline leaching process are relatively viscous, which makes filtration very diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/14C22B34/12C22B34/22
CPCC22B3/14C22B34/1254C22B34/22Y02P10/20
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