Title:
多段階の強還元による還元チタン粉末の製造方法
Document Type and Number:
Japanese Patent JP6788097
Kind Code:
B2
Abstract:
The invention relates to a method for preparing reduced titanium powder by multistage deep reduction, and belongs to the technical field of powder preparation. The method comprises the following steps of uniformly mixing dried titanium dioxide powder with magnesium powder to obtain a mixture, adding the mixture in a self-propagating reaction furnace, triggering a self-propagating reaction, obtaining an intermediate product of which low-valence titanium oxides TiO are dispersed in an MgO matrix, leaching the intermediate product with hydrochloric acid as a leaching solution, performing filtering, washing and vacuum drying to obtain a low-valence titanium oxide TiO precursor, uniformly mixing the low-valence titanium oxide TiO precursor with calcium powder, performing pressing to obtain semi-finished products, placing the semi-finished products in a vacuum reduction furnace for second-time deep reduction, and leaching the deep reduction product with the hydrochloric acid as a leaching solution so as to obtain the reduced titanium powder. The method has the advanges of being low in cost of raw materials, simple to operate, and low in requirements for process conditions and instruments and equipment, lays the foundations for industrial production. The resultant reduced titanium powder has the advantages of being high in purity, fine in particle size, controllable in particle size distribution, high in powder activity and the like.
Inventors:
Chang'an
Mameshi River
Liu Yan
Lu Guo
Zhao Akizuki
Ushirei
Fu University
Zhang Weiwang
Mameshi River
Liu Yan
Lu Guo
Zhao Akizuki
Ushirei
Fu University
Zhang Weiwang
Application Number:
JP2019504911A
Publication Date:
November 18, 2020
Filing Date:
May 21, 2018
Export Citation:
Assignee:
Northeastern University
International Classes:
C22B34/12; B22F9/20; C22B1/24; C22B3/10; C22B5/04; C22B9/04
Domestic Patent References:
| JP2015536384A | ||||
| JP2009544840A | ||||
| JP57002806A |
Foreign References:
| GB664061A |
Attorney, Agent or Firm:
sk patent corporation
Akihiko Okuno
Hiroyuki Ito
Akihiko Okuno
Hiroyuki Ito