Fast, on-site determination of incombustible matter in coal and rock-dust mixtures
This nonfiction guide explains a rapid method for measuring the noncombustible content in mine dust. It describes a portable setup that can be carried to surface or convenient mine stations to help ensure the right mix of rock dust for safety.
In this edition, you’ll learn how the modified volumeter works with a 20-gram sample and 50 c. c. of alcohol, how to calibrate for different dust types, and how to apply the method to road and rib dust used in coal mines. The text also covers handling moisture, correcting readings, and interpreting results for practical safety planning.
- How the volumeter determines the percentage of dry incombustible matter in coal and rock-dust blends
- Step-by-step calibration routines for Pittsburgh coal dust, shale, limestone, and mixed road dusts
- Corrections needed when dust samples contain water or moisture
- Accuracy expectations and practical applications for mine safety and dust explosion prevention
Ideal for mining engineers, safety officers, and laboratory technicians seeking a quick, field-friendly testing method for rock-dust effectiveness in coal mines.