Optical Rock Dust Meter Field Evaluation

摘要

The Bureau of Mines Pittsburgh Research Center has developed a portable meter formeasuring the concentration of binary dust mixtures whose constituents have different optical reflectivities. The meter has been successfully tested with coal dust-rock dust mixtures taken from coal mines in Europe and USA and fluorinated-carbon mixtures that change from carbon black to pure white during fluorination. Additional study has also substantiated the theoretical expressions used in the design of the meter.