发明名称 |
Process for the production of crystalline titanium powder |
摘要 |
The invention provides a process for the production of crystalline titanium powder containing single crystals or agglomerates of single crystals having an average crystal size (by volume) greater than 1 μm, said process including reacting a titanium chloride species, preferably titanium dichloride, and reducing metal in a continuous back-mix reactor to produce a free flowing suspension of titanium powder in molten chloride salt wherein: i. both the titanium chloride species and the reducing metal are dissolved in a molten chloride salt and fed to the reactor containing a chloride salt of the reducing metal; ii. the average feed ratio of the titanium chloride species and reducing metal to the continuous back-mix reactor is within 1%, preferably within 0.1%, of the stoichiometric ratio required to fully reduce the titanium chloride salt to titanium metal; iii. the concentration of titanium powder in the fluid suspension of titanium powder in molten salt in the continuous back-mix reactor is between 2 and 23 mass %; and iv. The reducing metal is lithium, sodium, magnesium, or calcium. |
申请公布号 |
US9567690(B2) |
申请公布日期 |
2017.02.14 |
申请号 |
US201314406166 |
申请日期 |
2013.05.29 |
申请人 |
CSIR |
发明人 |
Van Vuuren David Steyn;Oosthuizen Salomon Johannes;Swanepoel Jaco Johannes |
分类号 |
C30B9/04;C30B9/00;B22F1/00;B22F3/24;C30B29/02 |
主分类号 |
C30B9/04 |
代理机构 |
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代理人 |
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主权项 |
1. A process for the production of crystalline titanium powder containing single crystals or agglomerates of single crystals having an average crystal size (by volume) greater than 1 μm, said process including reacting a titanium chloride species, and reducing metal in a continuous back-mix reactor to produce a free flowing suspension of titanium powder in molten chloride salt wherein:
i. both the titanium chloride species and the reducing metal are dissolved in a molten chloride salt including suspended titanium powder and fed to the reactor containing a chloride salt of the reducing metal; ii. the average feed ratio of the titanium chloride species and reducing metal to the continuous back-mix reactor is within 1% of the stoichiometric ratio required to fully reduce the titanium chloride salt to titanium metal; iii. the concentration of titanium powder in the fluid suspension of titanium powder in molten salt in the continuous back-mix reactor is between 2 and 23 mass %; and iv. the reducing metal is lithium, sodium, magnesium, or calcium. |
地址 |
Pretoria ZA |