Method for extracting titanium from titanium-containing blast furnace slag by aluminothermy

A technology of blast furnace slag and process, which is applied in the field of titanium extraction from titanium-containing blast furnace slag, can solve the problems that acid leaching is difficult to complete and titanium minerals cannot be obtained, and achieves the effect of improving resource recovery and utilization rate

Inactive Publication Date: 2014-08-06
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical problem to be solved is that due to the existence of perovskite and other minerals in the tradi

Method used

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  • Method for extracting titanium from titanium-containing blast furnace slag by aluminothermy

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Experimental program
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Effect test

Embodiment approach 1

[0028] 1) Crush and grind titanium-containing blast furnace slag to 180 mesh ± 10 mesh, and mix well.

[0029] 2) According to the mass ratio of slag: C=100:6.53, weigh 10 grams of titanium-containing blast furnace slag and 0.653 grams of carbon powder.

[0030] 3) Under an argon protective atmosphere, the temperature of the tube electric furnace was raised to 1600°C. Put the mixed ingredients into an alumina crucible, heat it into a tube electric furnace, and keep it warm for 2 hours.

[0031] 4) After the heat preservation is over, take it out at 1600°C, put it directly into water to cool it, and then put it into a drying oven for drying.

[0032] 5) Under the temperature condition of 95 DEG C, use HCl to carry out acid leaching treatment on the carbonized blast furnace slag, the HCl concentration is 36% ± 1%, and the addition amount of HCl is based on the liquid-solid ratio of HCl and carbonized blast furnace slag being 8: The ratio of 1 is added, and the time required fo...

Embodiment approach 2

[0036] 1) Crush and grind titanium-containing blast furnace slag to 180 mesh ± 10 mesh, and mix well.

[0037] 2) According to the mass ratio of slag: C=100:6.53, weigh 10 grams of titanium-containing blast furnace slag and 0.653 grams of carbon powder.

[0038] 3) Under an argon protective atmosphere, the temperature of the tube electric furnace was raised to 1600°C. Put the mixed ingredients into an alumina crucible, heat it into a tube electric furnace, and keep it warm for 2 hours.

[0039] 4) After the heat preservation is over, take it out at 1600°C, put it directly into water to cool it, and then put it into a drying oven for drying.

[0040] 5) Under the temperature condition of 85 DEG C, use HCl to carry out acid leaching treatment on the carbonized blast furnace slag, the HCl concentration is 36% ± 1%, and the addition amount of HCl is based on the liquid-solid ratio of HCl and carbonized blast furnace slag being 8: 1, the time required for acid leaching is 6h. Af...

Embodiment approach 3

[0044] 1) Crush and grind titanium-containing blast furnace slag to 180 mesh ± 10 mesh, and mix well.

[0045] 2) According to the mass ratio of slag: C=100:7.62, weigh 10 grams of titanium-containing blast furnace slag and 0.762 grams of carbon powder.

[0046] 3) Under an argon protective atmosphere, the temperature of the tube electric furnace was raised to 1600°C. Put the mixed ingredients into an alumina crucible, heat it into a tube electric furnace, and keep it warm for 2 hours.

[0047] 4) After the heat preservation is over, take it out at 1600°C, put it directly into water to cool it, and then put it into a drying oven for drying.

[0048] 5) Under the temperature condition of 95 ℃, utilize HCl to carry out acid leaching treatment to the blast furnace slag after carbonization, this HCl concentration is 36% ± 1%, the addition amount of HCl is based on HCl and carbonized blast furnace slag liquid-solid ratio is 6: 1, the time required for acid leaching is 8h. After ...

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Abstract

The invention provides a method for extracting titanium from titanium-containing blast furnace slag, and belongs to the fields of metallurgy and chemistry. The method comprises the steps of preprocessing, mixing materials, reducing by the carbothermy, cooling with water, pickling, and roasting with alkali. The method specifically comprises the following steps: crushing and grinding titanium-containing blast furnace slag into 180+/-10 meshes; mixing slag and carbon powder based on a certain mass ratio; heating an electric tube furnace to reach a given temperature under the argon protective atmosphere; feeding the mixed material into an alumina crucible; transferring into the electric tube furnace under a high temperature; maintaining the temperature for a certain time; taking out under a high temperature; cooling with water; filtering the slag subjected to HCl pickling and carbonizing, and separating filter residue and filtrate; processing the filter residue through NaOH (or Na2CO3) by roasting with alkali after pickling in order to generate Na2SiO3 through an Si-containing component in the filter residue; washing with water and filtering to separate Na2SiO3 and TiC to obtain TiC filter residue; and drying the filter residue to obtain relatively pure TiC. The method is simple in process, stable in process parameters, and effectively realizes separating and enriching extracting of titanium and other elements in the blast furnace slag.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to a process for extracting titanium from titanium-containing blast furnace slag. Background technique [0002] my country is rich in titanium resources, ranking first in the world, but the utilization rate of titanium resources is very low. At present, the blast furnace process is mainly used to smelt vanadium-titanium magnetite (such as Panzhihua Iron and Steel and Chengde Iron and Steel), and iron and vanadium are recovered, while titanium is produced as TiO 2 Form into blast furnace slag (mass fraction about 25%), due to the complex mineral phase structure, it is difficult to recycle. A large amount of titanium-containing blast furnace slag not only occupies valuable land resources, but also is a serious waste of titanium resources. Therefore, how to better deal with titanium-containing blast furnace slag is of great significance to the comprehensive u...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B34/12
CPCY02P10/20
Inventor 张国华甄玉兰周国治
Owner UNIV OF SCI & TECH BEIJING
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