Abstract: The present invention provides a method for producing high-purity calcium, the method being characterized by the following: performing first sublimation purification by introducing calcium starting material having a purity, excluding the gas components, of 4N or less into a crucible of a sublimation vessel, subjecting the starting material to sublimation by heating at 750° C. to 800° C., and causing the product to deposit (evaporate) onto the inside walls of the sublimation vessel; and then, once the calcium that has been subjected to first sublimation purification is recovered, performing second sublimation purification by introducing the recovered calcium again to the crucible to the sublimation vessel, heating the recovered calcium at 750° C. to 800° C.
Abstract: Liquid metal is continuously recovered by condensing metal vapour in a sealed system, more or less at atmospheric pressure, and collecting liquid metal in a crucible. The contents of the crucible are agitated and the temperature is controlled to prevent the liquid metal from solidifying. Liquid metal and dross are tapped from the crucible.
Type:
Grant
Filed:
January 24, 2006
Date of Patent:
January 5, 2010
Assignee:
Mintek
Inventors:
Albert Francois Simon Schoukens, Thomas Robert Curr, Masud Abdellatif, Rodney Murison Whyte
Abstract: Liquid metal is continuously recovered by condensing metal vapour in a sealed system, more or less at atmospheric pressure, and collecting liquid metal in a crucible. The contents of the crucible are agitated and the temperature is controlled to prevent the liquid metal from solidifying. Liquid metal and dross are tapped from the crucible.
Type:
Application
Filed:
January 24, 2006
Publication date:
May 22, 2008
Applicant:
MINTEK
Inventors:
Albert Francois Simon Schoukens, Thomas Robert Curr, Masud Abdellatif, Rodney Murison Whyte