Patent · US Expired

Method and apparatus for rapidly freezing molten metals and metalloids in particulate form

US4347199A · kind A · utility

15Cited by
4References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 2, 1981
Grant dateAug 31, 1982
Priority date—
Expiry dateMar 2, 2001

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB22F9/10
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

Described are a method and apparatus for freezing molten metals and metalloids in particulate or flake form at very rapid cooling rates. A volatile coolant liquid is fed to the center of a rapidly rotating disc-like member to create an outwardly flowing film of coolant across the surface of the member. The material to be processed is fed to the coolant film at a location spaced from the center and is thrown outwardly by centrifugal forces while being cooled by vaporization of the liquid. The rotating member may include upwardly projecting vanes for collision with the outwardly flowing material to produce a higher surface area product.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.