发明名称 |
METHOD FOR REDUCING ALUMINA OR MAGNESIA BY UTILIZING SUPERSONIC GAS FLOW |
摘要 |
An alumina- or magnesia-reducing process in which a greenhouse gas or substance harmful to the human body is not emitted, which can achieve improved energy efficiency in comparison with the Hall-Heroult or Pidgeon methods. The process includes: introducing an alumina or magnesia powder with a carrier gas to the upstream side of a throat provided on a reducing unit; pressure-transferring the powder and carrier gas to the throat by an operative gas introduced to the upstream side of the throat; irradiating the throat with a laser beam to convert the alumina or magnesia into a plasma state and dissociate the alumina or magnesia thermally; jetting the thermally dissociated product through a nozzle provided on the downstream side of the throat at a supersonic speed to form a frozen flow; and isolating aluminum or magnesium. Hydrogen may be added to the operative gas to accelerate the reduction of alumina or magnesia. |
申请公布号 |
US2015203937(A1) |
申请公布日期 |
2015.07.23 |
申请号 |
US201314421181 |
申请日期 |
2013.03.08 |
申请人 |
Japan Expert Clone Corporation ;The University of Tokyo ;Tokyo Metropolitan University, Municipal University Corporartion |
发明人 |
Arakawa Yoshihiro;Nakano Masakatsu;Matsui Makoto;Goto Tetsuya |
分类号 |
C22B26/22;C22B21/02;C22B4/02 |
主分类号 |
C22B26/22 |
代理机构 |
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代理人 |
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主权项 |
1. A method for reducing alumina or magnesia, the method comprising:
heating alumina powders or magnesia powders by heating means for putting it in a plasma state so as to thermally dissociate aluminum or magnesium from oxygen, and ejecting gas in the plasma state in a form of supersonic jet steam from a nozzle so as to make it in frozen flow, to thereby isolate aluminum or magnesium. |
地址 |
Tokyo JP |