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- W204952223 abstract "The early and reliable detection of the self-heating of combustible substances in mines is of considerable importance to the mining community. This Bureau of Mines report describes the results of a variety of studies of incipient combustion and its detection. Heated samples of coal, wood, and various polymers were used to evaluate the relative sensitivities of several types of detectors. The laboratory results indicate that submicron particulate detection is the most universal and sensitive method. Carbon monoxide detection was as sensitive for pyrolyzing coal, but was relatively insensitive to pyrolyzing wood or plastics. The conventional type of ionization smoke detector was the least sensitive for coal and of intermediate sensitivity for wood and plastics. Self-heating experiments with Pittsburgh Seam coal piles of varying particle sizes gave ignition temperatures of 170C for 4-7micrometers dust, which increased monotonically with particle size. The measured heating rates were compared with data from an adiabatic calorimeter to obtain preexponential rate constants. These varied linearly with the surface area per unit mass of sample." @default.
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- W204952223 date "1976-01-01" @default.
- W204952223 modified "2023-09-27" @default.
- W204952223 title "Studies of incipient combustion and its detection. Report of investigations 1976" @default.
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