HOPPER POPPER

Experience in developing drilling equipment for drilling into the frozen coal (either in railway cars or stockpiles) and then loosening the coal by an air shot of about 400 cubic inches at 2000 to 8000 psi is described. It was difficult to drill into the frozen coal and to mount the drilling equipment so that it was stable. Previous methods of loosening frozen coal are discussed briefly.

• Supplemental Notes:
  • From 71, Annual Conference of the International District Heating Association; Harbor Springs, Michigan, June 23, 1980; Section 22 of Proceedings of the International District Heating Association.
• Corporate Authors:

  Long-Airdox Company

  Oak Hill, West VA,   United States  25901
• Authors:
  • Hastings, M R
• Conference:
  • From 71, Annual Conference of the International District Heating Association; Harbor Springs, Michigan, June 23, 1980; Section 22 of Proceedings of the International District Heating Association.
• Publication Date: 1980

Media Info

• Pagination: p. 9

Subject/Index Terms

• TRT Terms: Coal; Compressed air; Freezing; Loading and unloading; Low temperature; Open top cars
• Old TRIS Terms: Unloading processes
• Subject Areas: Freight Transportation; Materials; Railroads;

Filing Info

• Accession Number: 00335866
• Record Type: Publication
• Source Agency: Energy Research Abstracts
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Aug 15 1981 12:00AM