C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 4/04 (2006.01) C22B 5/16 (2006.01) C22B 7/02 (2006.01) C22B 13/02 (2006.01) C22B 13/06 (2006.01) C22B 19/30 (2006.01)
Patent
CA 2177766
Dusts containing zinc and/or lead in the form of oxides and one or more reducing agents are mixed with each other before or after being introduced into a heat treatment furnace. The mixture is heated to a given temperature range under a substantial vacuum so that the zinc and/or lead in the form of oxides are reduced to zinc and/or lead in the state of pure metals and evaporated in the furnace. The evaporated zinc and/or lead are introduced into a retrieving container also under a substantial vacuum and at a given temperature where the evaporated zinc and/or lead pure metals are condensed and retrieved.
Hara Toshikatsu
Okada Masamichi
Okada Yuji
Sasamoto Hirohiko
Shirakawa Hirokazu
Aichi Steel Works Ltd.
Borden Ladner Gervais Llp
Toyokin Kabushiki Kaisha
Toyota Jidosha Kabushiki Kaisha
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