发明授权
- 专利标题: Process for preparing metallic cadmium powder
- 专利标题(中): 制备金属镉粉的工艺
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申请号: US185849申请日: 1994-01-25
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公开(公告)号: US5505761A公开(公告)日: 1996-04-09
- 发明人: Yoshimi Hata , Masamoto Sasaki , Junichirou Tanaka , Hirohisa Senzaki , Morimasa Sumida , Masaharu Onoue
- 申请人: Yoshimi Hata , Masamoto Sasaki , Junichirou Tanaka , Hirohisa Senzaki , Morimasa Sumida , Masaharu Onoue
- 申请人地址: JPX Tokyo
- 专利权人: Mitsui Mining & Smelting Co., Ltd.
- 当前专利权人: Mitsui Mining & Smelting Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX4-161885 19920529
- 主分类号: B22F9/12
- IPC分类号: B22F9/12 ; H01M4/38 ; H01M4/44
摘要:
A process for preparing a metallic cadmium powder for use in a nickel-cadmium by heat melting metallic cadmium in an evaporator, introducing an inert gas into the evaporator to discharge cadmium vapor along with the inert gas into a cooler, and collecting the resulting metallic cadmium powder, wherein the process condition is regulated such that at least one of the following conditions (1) and (2) can be satisfied:(1) the amount of the inert gas flow introduced into the evaporator is at least 30 Nl/g of cadmium vapor while the direction of introducing the inert gas into the evaporator is set against the surface of the molten cadmium; and(2) the temperature of the molten cadmium in the evaporator and the amount of the inert gas flow introduced into the evaporator are set such that the following formulae can be satisfied:log y.gtoreq.8.8.times.10.sup.-3 x-5.3 (600.ltoreq.x.ltoreq.900), andlog y.gtoreq.1.8.times.10.sup.-3 x-0.96 (330.ltoreq.x.ltoreq.600),wherein x is the temperature (.degree.C.) of the molten cadmium, and y is the flow rate (cm/sec) of the inert gas over the surface of said molten cadmium.
公开/授权文献
- US4871199A Double bead tube fitting 公开/授权日:1989-10-03