A correlation between composition and explosibility index for coal dust

Abstract

A composition index for coal and an explosibility index for coal dust are defined. The first is based on the proximate and ultimate analysis of different types of coals, ranging from lignites to anthracites. The second index depends on the explosibility parameters of coal dust determined by means of laboratory tests, such as the Hartmann Tube and the Godbert-Greenwald Furnace. Through a canonical correlation analysis, three regions of danger for coal dust are established; these represent safe coals, dangerous coals and very dangerous coals. The theoretical percentage of incombustible dust required to make the coal dust inert is determined. © 1988.