Patents Assigned to Alcoa of Australia Ltd.
  • Patent number: 5596816
    Abstract: A method is disclosed for drying particulate material, particularly alumina, which comprises the steps of subjecting a first portion of a wet particulate material feed to pre-drying to produce at least partially dried particular material and moisture, heating the at least partially dried particulate material to a temperature higher than the temperature of the pre-drying to produce hot particulate material, water vapour and products of combustion, passing the water vapour and products of combustion to the pre-drier, mixing the hot particulate material with a second portion of the wet particulate material feed to cool the hot particulate material and further cooling the cooled particulate material and subsequent separation to produce a low temperature particular material product.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: January 28, 1997
    Assignee: Alcoa of Australia Ltd.
    Inventors: Gregory J. Mills, William S. Maley