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Method for preparing reduced titanium powder by multi-stage deep reduction

A deep and titanium powder technology, which is applied in the field of multi-stage deep reduction to prepare reduced titanium powder, can solve the problems of great influence on the performance of titanium powder and high cost, and achieve controllable particle size distribution, low equipment requirements, process conditions and equipment requirements low effect

Active Publication Date: 2017-10-10
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Traditionally, the cost of preparing titanium powder from titanium sponge is high, and the impurities in sponge titanium have a great impact on the performance of titanium powder. Therefore, there is greater room for development in the preparation of titanium powder from titanium oxides.

Method used

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  • Method for preparing reduced titanium powder by multi-stage deep reduction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for preparing reduced titanium powder through multi-stage deep reduction is carried out in the following steps:

[0055] Step 1, self-propagating reaction

[0056] Put the titanium dioxide powder in an oven and dry at 100-150°C for 24 hours to obtain the dried titanium dioxide powder; mix the dried titanium dioxide powder and magnesium powder evenly to obtain a mixed material; press the mixed material at 20MPa to obtain Block billet, put the block billet of the mixed material into the self-propagating reaction furnace, and initiate the self-propagating reaction by partial ignition. The temperature is controlled at 500 ° C. After the reaction material is cooled, the low-valent titanium oxide Ti is obtained. x The intermediate product of O dispersed in the MgO matrix; where, by molar ratio, TiO 2 : Mg=1:1, low-valent titanium oxide Ti x The intermediate product of O dispersed in the MgO matrix is ​​a mixture of non-stoichiometric low-valent titanium oxides, and...

Embodiment 2

[0070] A method for preparing reduced titanium powder through multi-stage deep reduction is carried out in the following steps:

[0071] Step 1, self-propagating reaction

[0072] Put the titanium dioxide powder in an oven and dry at 100-150°C for 24 hours to obtain the dried titanium dioxide powder; mix the dried titanium dioxide powder and magnesium powder evenly to obtain a mixed material; press the mixed material at 40MPa to obtain Block billet, put the block billet of the mixed material into the self-propagating reaction furnace, and initiate the self-propagating reaction by means of partial ignition. The temperature is controlled at 600 ° C. After the reaction material is cooled, the low-valent titanium oxide Ti is obtained. x The intermediate product of O dispersed in the MgO matrix; where, by molar ratio, TiO 2 : Mg=1:1.2, low-valent titanium oxide Ti x The intermediate product of O dispersed in the MgO matrix is ​​a mixture of non-stoichiometric low-valent titanium ...

Embodiment 3

[0086] A method for preparing reduced titanium powder through multi-stage deep reduction is carried out in the following steps:

[0087] Step 1, self-propagating reaction

[0088]Put the titanium dioxide powder in an oven and dry at 100-150°C for 24 hours to obtain the dried titanium dioxide powder; mix the dried titanium dioxide powder and magnesium powder evenly to obtain a mixed material; press the mixed material at 60MPa to obtain Block billet, put the block billet of the mixed material into the self-propagating reaction furnace, and initiate the self-propagating reaction by partial ignition. The temperature is controlled at 500 ° C. After the reaction material is cooled, the low-valent titanium oxide Ti is obtained. x The intermediate product of O dispersed in the MgO matrix; where, by molar ratio, TiO 2 :Mg=1:0.8, low-valent titanium oxide Ti x The intermediate product of O dispersed in the MgO matrix is ​​a mixture of non-stoichiometric low-valent titanium oxides, and...

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Abstract

The invention provides a method for preparing reduced titanium powder by multi-stage deep reduction and belongs to the technical field of powder preparation. The method comprises the steps as follows: mixing dried titanium dioxide powder and magnesium powder evenly, adding the mixture to a self-propagating reaction furnace and initiating a self-propagating reaction to obtain an intermediate product, dispersed in a MgO matrix, of low-valent titanic oxide TixO; leaching the intermediate product with hydrochloric acid as a leaching solution, and performing filtering, washing and vacuum drying to obtain a low-valent titanium oxide TixO precursor; mixing the low-valent titanium oxide TixO precursor with calcium powder, pressing the mixture, and placing the mixture in a vacuum reduction furnace for secondary deep reduction; leaching a deep reduction product with the hydrochloric acid as the leaching solution to obtain the reduced titanium powder. According to the method, the cost of raw materials is low, operation is simple, requirements for technological conditions and equipment are low, a basis is laid for industrial production, and the obtained reduced titanium powder has the advantages of high purity, fine particle size, controllable particle size distribution, high powder activity and the like.

Description

technical field [0001] The invention belongs to the technical field of powder making in the powder metallurgy process, and in particular relates to a method for preparing reduced titanium powder through multi-stage deep reduction. Background technique [0002] Titanium is a new structural and functional material that appeared in the 20th century and has epoch-making significance in human history. Compared with other metals, titanium metal has a series of special physical and chemical properties, such as low density, high specific strength, Excellent corrosion resistance and good high temperature performance. Titanium powder is an important titanium material. Titanium powder is mainly used as a grain refiner for aluminum alloys and a deflagration agent for special pyrotechnics and fireworks. Titanium powder can also be used as electric vacuum getter, surface coating additive, powder metallurgy and raw material for 3D printing. my country's titanium powder manufacturing ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12B22F9/20
CPCB22F9/20C22B34/1245C22B34/1277C22B5/18C22B34/1268C22B34/1295C22B34/12B22F2301/205Y02P10/20
Inventor 张廷安豆志河刘燕范世钢吕国志赵秋月牛丽萍傅大学张伟光
Owner NORTHEASTERN UNIV LIAONING
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