A device for induction-heat melting treatment of metal-oxide-powders includes a closed hopper, a heat-resistant piping, for supplying a powder to an induction heating pipe which is made of dielectric material and comes in contact with the lower end part of the heat-resistant pipe in a vertically sliding...http://www.google.com/patents/US6478839?utm_source=gb-gplus-sharePatent US6478839 - Method of induction-heat melting treatment of metal-oxide-containing powders and device therefor
