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Primary Gas Toxicities and Smoke Particle Characteristics During a Two-stage Combustion of Mine Conveyor Belts: Development of a Test Parameter.

Authors
Derosa-MI; Derosa-MI
Source
MISSING :13 pages
Link
NIOSHTIC No.
10007253
Abstract
The U.S. Bureau of Mines performed experiments to determine if the primary gas toxicities evolved during the early (approx. 300 Deg c) and later (> or = to 400 deg c) combustion stages of mine conveyor belts could be predicted by a smoke particle characteristic. The experiments were conducted in an approximately 20-l furnace at set furnace temperatures of 150 deg, 250 deg, and 1,000 deg c, with a furnace airflow of 10 l/min. The variables studied, as a function of time, included hydrogen chloride and carbon monoxide concentrations, the average smoke particle diameter (dg) and number concentration (no), and the product of the average smoke particle diameter and concentration (dgno). Other variables included the sample and furnace temperatures and the sample mass weight loss. Results show that the inverse of the smoke particle diameter- concentration product (l/dgno) correlates directly with the hydrogen chloride and carbon monoxide toxicities released in large quantities during the early and later stages of combustion.
Publication Date
19890101
Document Type
IH; Report of Investigations;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
RI 9250
NIOSH Division
PRC;
Source Name
MISSING
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