Patents Assigned to Zeigler Coal Holding Company
  • Pelletizing coal or coke with starch particles
    Patent number: 5242470
    Abstract: Coal or other fine particles are pelletized by mixing relatively moist particles of them with fine particles of a waste product collected during grain transport and storage and extruding or pelletizing the mixture without extensive heating or steaming.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: September 7, 1993
    Assignee: Zeigler Coal Holding Company
    Inventors: James A. Salter, James P. Frederick, Edward C. Sumner, IV
  • Scrubber for dispersing dust generated by longwall shearers
    Patent number: 5219208
    Abstract: An air scrubbing system for removing dust produced by longwall shearers from the operator's work area. The system uses a plurality of small scrubbing units mounted on the shearer. Each of the scrubbing units utilizes a series of twin fluid atomizers located at the inlet of the unit to produce a fine water mist for capturing the respirable dust. The scrubbing units return the dust-laden mist to the coal face.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: June 15, 1993
    Assignee: Zeigler Coal Holding Company
    Inventors: Chung F. Liao, George W. Graham