National Technical Reports Library - NTRL

National Technical Reports Library


Details
Actions:
Download PDFDownload XML
Download

Mining Environmental Target Surveillance Investigation: Kyanite 'Sillimanite' Group Minerals.


PB84240217

Publication Date 1981
Personal Author Cocalis, J.
Page Count 22
Abstract Potential health hazards of miner exposures to kyanite (1302767) dust were investigated. Potential toxicity of four minerals in the kyanite group was estimated on the basis of physical appearance and free silica (14808607) content. The four minerals of the group were andalusite (12183801), sillimanite (12141456), mullite (1302938) and kyanite. Bulk samples and breathing zone air samples were taken and analyzed by light microscopy and transmission electron microscopy. Quartz (14808607) was commonly found around kyanite deposits and cristobalite (14464461) was formed when the minerals were calcined. Free silica in respirable dust samples reached as high as 48 percent. Andalusite, kyanite, and sillimanite decomposed at about 1550 degrees-C to form mullite and cristobalite. Cristobalite was present in the minerals produced in two facilities. Breathing zone air samples of free silica exceeded NIOSH recommended standards in 8 of 17 samples, with respiratory protection worn by five of the eight workers. The author concludes that potential exposure to dusts containing free silica exists for about 175 kyanite ore miners.
Keywords
  • Environmental surveys
  • Industrial medicine
  • Mines(Excavations)
  • Dust control
  • Exposure
  • Toxicity
  • Inspection
  • Hazardous materials
  • Silicon dioxide
  • Quartz
  • Toxic substances
  • Occupational safety and health
  • Kyanite
  • Andalusite
  • Sillimanite
  • Mullite
  • Cristobalite
  • CAS 14808-60-7
  • CAS 1302-76-7
  • CAS 14464-46-1
  • CAS 12183-80-1
  • CAS 12141-45-6
  • CAS 1302-93-8
Source Agency
  • National Institute for Occupational Safety and Health
NTIS Subject Category
  • 57U - Public Health & Industrial Medicine
  • 57Y - Toxicology
  • 68G - Environmental Health & Safety
  • 48A - Mineral Industries
  • 68A - Air Pollution & Control
Corporate Authors National Inst. for Occupational Safety and Health, Cincinnati, OH.
Document Type Technical Report
NTIS Issue Number 198426
Mining Environmental Target Surveillance Investigation: Kyanite 'Sillimanite' Group Minerals.
Mining Environmental Target Surveillance Investigation: Kyanite 'Sillimanite' Group Minerals.
PB84240217

  • Environmental surveys
  • Industrial medicine
  • Mines(Excavations)
  • Dust control
  • Exposure
  • Toxicity
  • Inspection
  • Hazardous materials
  • Silicon dioxide
  • Quartz
  • Toxic substances
  • Occupational safety and health
  • Kyanite
  • Andalusite
  • Sillimanite
  • Mullite
  • Cristobalite
  • CAS 14808-60-7
  • CAS 1302-76-7
  • CAS 14464-46-1
  • CAS 12183-80-1
  • CAS 12141-45-6
  • CAS 1302-93-8
  • National Institute for Occupational Safety and Health
  • 57U - Public Health & Industrial Medicine
  • 57Y - Toxicology
  • 68G - Environmental Health & Safety
  • 48A - Mineral Industries
  • 68A - Air Pollution & Control
Loading