Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Effect of Energy and Impact Direction on Coal Fragmentation.

Authors
Voltz-JI
Source
MISSING :16 pages
Link
NIOSHTIC No.
10007302
Abstract
Ths U.S. Bureau of Mines has conducted fundamental coal fragmentation studies to evaluate the effects of impact energy and direction of bedding plans on dust generation, size distribution, and impact-output energy relationships. Product size distributions were obtained for the fragmented samples by screening to minus 150 mesh. The minus 150-mesh fines were analyzed with a light- scattering photometer with a measurement range of 176 to 1.9 Um. Increased input energy produced a significant increase in the weight of plus 3/8-in material for impact perpendicular to the bedding planes. No significant trend was observed for parallel impact. Impact direction had little influence on dust size distribution, and input versus output energy relationships. As expected, total airborne dust measured at time of impact and percent particulates below 11 um in size generally increased wtih increased input energy for both directions of impact. Energy used for sample fragmentation increased with increased energy input.
Publication Date
19890101
Document Type
IH; Report of Investigations;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
RI 9260
NIOSH Division
TCRC;
Source Name
MISSING
TOP