Patents Assigned to Ziegler Coal Holding Company
  • Coal blends having improved ash viscosity
    Patent number: 5364421
    Abstract: Coal blends suitable for combustion in a slagging-type combustion apparatus comprise blends of (1) a bituminous coal which forms ash slag having unacceptably high viscosity with (2) a lignitic coal which forms ash slag having marginal viscosity characteristics or T.sub.cv whereupon combustion of the blends results in formation of ash slag having viscosity which is synergistically lowered and acceptable for slagging.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: November 15, 1994
    Assignee: Ziegler Coal Holding Company
    Inventors: Timothy S. Westby, Thomas G. McCord, Lynton W. R. Dicks