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Sources and Characteristics of Quartz Dust in Coal Mines.

PB91160911

Publication Date	1990
Personal Author	Organiscak, J. A.; Page, S. J.; Jankowski, R. A.
Page Count	29
Abstract	Quartz dust is one of the most significant on going health concerns in coal mining today. Since the early 1980's the U.S. Bureau of Mines has conducted numerous studies in underground and surface coal mines to identify the sources of quartz dust and its fundamental characteristics. The report presents data and conclusions obtained from these studies. The two most significant quartz dust sources were found to be the continuous miner excavating rock and the highwall drill operating in a rock overburden. The percentage of quartz was found to be higher in the smaller size fractions of dust when significant amounts of rock were mined by the continuous miner. Another factor theorized to affect quartz dust generation and size characteristics is the morphology of the quartz-bearing rock. Several laboratory studies were conducted to investigate capture efficiency of water spray technology and flooded-bed scrubbers with respect to the particle size of the dust. Water sprays and flooded-bed scrubbers were both found to be less efficient on smaller dust particles, and the scrubber was particularly less efficient on quartz dust. These results indicate that quartz control technology should be directed at controlling smaller sized dust particles.
Keywords	Coal mines Air pollution control equipment Quartz Dust control Pollution sources Scrubbers Indoor air pollution Particle size Silicon dioxide Spraying Sprinkling Performance evaluation
Source Agency	Bureau of Mines
NTIS Subject Category	68A - Air Pollution & Control 48A - Mineral Industries 99B - Industrial Chemistry & Chemical Process Engineering
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 90-2409.
Document Type	Technical Report
Title Note	Information circular/1990.
NTIS Issue Number	199111

Sources and Characteristics of Quartz Dust in Coal Mines.

Sources and Characteristics of Quartz Dust in Coal Mines.
PB91160911

Publication Date	1990
Personal Author	Organiscak, J. A.; Page, S. J.; Jankowski, R. A.
Page Count	29
Abstract	Quartz dust is one of the most significant on going health concerns in coal mining today. Since the early 1980's the U.S. Bureau of Mines has conducted numerous studies in underground and surface coal mines to identify the sources of quartz dust and its fundamental characteristics. The report presents data and conclusions obtained from these studies. The two most significant quartz dust sources were found to be the continuous miner excavating rock and the highwall drill operating in a rock overburden. The percentage of quartz was found to be higher in the smaller size fractions of dust when significant amounts of rock were mined by the continuous miner. Another factor theorized to affect quartz dust generation and size characteristics is the morphology of the quartz-bearing rock. Several laboratory studies were conducted to investigate capture efficiency of water spray technology and flooded-bed scrubbers with respect to the particle size of the dust. Water sprays and flooded-bed scrubbers were both found to be less efficient on smaller dust particles, and the scrubber was particularly less efficient on quartz dust. These results indicate that quartz control technology should be directed at controlling smaller sized dust particles.
Keywords	Coal mines Air pollution control equipment Quartz Dust control Pollution sources Scrubbers Indoor air pollution Particle size Silicon dioxide Spraying Sprinkling Performance evaluation
Source Agency	Bureau of Mines
NTIS Subject Category	68A - Air Pollution & Control 48A - Mineral Industries 99B - Industrial Chemistry & Chemical Process Engineering
Corporate Authors	Bureau of Mines, Pittsburgh, PA. Pittsburgh Research Center.
Supplemental Notes	Library of Congress catalog card no. 90-2409.
Document Type	Technical Report
Title Note	Information circular/1990.
NTIS Issue Number	199111