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Method and device for preparing high-purity low-oxygen titanium powder by metal vapor reduction

A technology for metal vapor and titanium powder, which is applied in the field of metal vapor reduction to prepare high-purity and low-oxygen titanium powder, can solve the problems such as the difficulty of achieving the ideal degree of purity and particle size of titanium powder, restricting the development of powder metallurgy titanium industry, and failing to meet industrial requirements. , to achieve the effect of fine particle size, simple structure and low cost

Active Publication Date: 2017-12-01
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the most commonly used method for preparing high-purity titanium powder is mainly hydrogenation dehydrogenation or atomization method, but the high-purity titanium powder obtained by hydrogenation dehydrogenation or atomization method has a high oxygen content, and the titanium powder obtained by hydrogenation dehydrogenation Irregular shape; and the titanium powder obtained by the atomization method is spherical, but the powder particles are prone to sticking during the atomization process, the powder particle size is too large and the particle size distribution is very wide, so further purification is required to obtain high-purity and low-oxygen titanium powder. Titanium powder
For example, take titanium sponge as a raw material to prepare high-purity titanium powder by hydrogenation dehydrogenation as an example. Due to the high impurity content of titanium sponge, it is easy to oxidize with high temperature to form TiO 2 The main impurity O element is introduced, and the impurity content (especially the oxygen content) of the final titanium powder is relatively high, which seriously affects the performance of the final titanium powder and cannot meet the industrial requirements; at the same time, the powder is also It is easy to grow and agglomerate, so the purity and particle size of titanium powder are difficult to reach the ideal level, which seriously restricts the development of powder metallurgy titanium industry

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  • Method and device for preparing high-purity low-oxygen titanium powder by metal vapor reduction

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Effect test

Embodiment 1

[0030] Select high-purity molten salt electrolytic titanium as raw material, and use hydrogenation dehydrogenation method to process molten salt electrolysis titanium to obtain titanium powder; put 50g of titanium powder obtained by hydrogenation dehydrogenation into the screen of the material frame in the vacuum-sealed heating furnace, select Ca As a reduced metal, add 50g Ca at the bottom of the vacuum-sealed heating furnace material frame, and draw a vacuum until the vacuum degree in the vacuum-sealed heating furnace reaches 8.2×10 -3 Seal after Pa, and then heat up to 1278K in a vacuum environment and keep it warm for 2 hours. After the reaction is completed, high-purity titanium powder is obtained. CaO on titanium powder to obtain high-purity low-oxygen titanium powder.

Embodiment 2

[0032] Select high-purity molten salt electrolytic titanium as the raw material, and use the atomization method to process the molten salt electrolytic titanium to obtain titanium powder; put 60g of titanium powder obtained by the inert gas atomization method into the screen of the inner material frame of the vacuum-sealed heating furnace, and select Na is used as a reducing metal, and 60gNa is added to the bottom of the vacuum-sealed heating furnace material frame, and the vacuum is drawn until the vacuum degree in the vacuum-sealed heating furnace reaches 8.2×10 -3 Seal after Pa, then heat up to 1285K in a vacuum environment and keep it warm for 3 hours. After the reaction is completed, high-purity titanium powder is obtained. After cooling to room temperature, the high-purity titanium powder is washed, pickled and dried to remove the high-purity titanium powder. Na on titanium powder 2 O, to obtain high-purity low-oxygen titanium powder.

Embodiment 3

[0034] Select high-purity molten salt electrolytic titanium as the raw material, and use the atomization method to process the molten salt electrolytic titanium to obtain titanium powder; put 60g of titanium powder obtained by the rotating electrode atomization method into the screen of the inner material frame of the vacuum-sealed heating furnace, and select K is used as a reducing metal, and 60g K is added to the bottom of the vacuum-sealed heating furnace material frame, and the vacuum is drawn until the vacuum degree in the vacuum-sealed heating furnace reaches 8.2×10 -3 Seal after Pa, then heat up to 1273K in a vacuum environment and keep it warm for 2 hours. After the reaction is completed, high-purity titanium powder is obtained. After cooling to room temperature, the high-purity titanium powder is washed with water, pickled and dried to remove the high-purity titanium K on powder 2 O, to obtain high-purity low-oxygen titanium powder.

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Abstract

The invention discloses a method and a device for preparing high-purity low-oxygen titanium powder by metal vapor reduction. The method comprises a method and a device for preparing high-purity low-oxygen titanium powder by metal vapor reduction. Carry out metal vapor reduction in a vacuum-sealed heating furnace to obtain high-purity titanium powder, and then wash, pickle and dry the high-purity titanium powder to obtain high-purity low-oxygen titanium powder; the device includes a furnace body with a furnace cavity, a furnace There is a furnace in the middle of the cavity, and a furnace tank is arranged in the furnace tank, and a material frame is placed in the furnace tank, and a screen is installed on the material frame. There is a distance between the screen screen and the bottom of the furnace tank, and the top open end of the furnace tank is sealed There is a detachable furnace cover, which is equipped with an exhaust valve, a pressure gauge and a vacuum pipe, and the furnace tank is also connected with an air inlet pipe. The invention has the advantages of low cost, high efficiency, environmental protection and cleaning.

Description

technical field [0001] The invention relates to the technical field of powder preparation, in particular to a method and a device for preparing high-purity low-oxygen titanium powder by metal vapor reduction. Background technique [0002] As a member of emerging metals, titanium has many excellent properties, such as high specific strength, small specific gravity, corrosion resistance, etc., and pure titanium generally refers to titanium materials with a purity greater than 99%. High-purity titanium has many excellent properties, such as low density, high melting point, low strength, and good plasticity. In recent years, with the rapid development of high-tech industries such as aerospace and electronic information, the amount of high-purity titanium is also increasing. How to better prepare high-purity titanium is an important direction for the development of today's titanium industry. [0003] At present, the most commonly used method for preparing high-purity titanium po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04B22F9/08B22F9/22
Inventor 袁铁锤李瑞迪蒋明祥邱子力周立波
Owner CENT SOUTH UNIV