Determination of Dustiness of Bulk Materials
A risk of dust explosions exists wherever combustible dusts are handled and is depending not only on the established safety characteristics, but also on a parameter describing the tendency to form a dust cloud, called dustiness. A system for use in laboratories is developed and presented to measure the dustiness. The principle is that the dust concentration of the free falling bulk material is determined by a dust concentration meter, which based on light absorption and light scattering according Lambert-Beers Law. Therefore, the dust is moved by a screw with a defined variable-speed into the measuring chamber. To avoid bonding of the particles the electrical charges are removed by a ring ionizer. The determination of a dust concentration a calibration curve is necessary to remove the extinguishing coefficient in Lambert-Beer s Law. This is realised with a special calibration system, where the dust collected subsequently on small glass plates is weighted and analyzed with the dust concentration meter. At least a dimensionless dustiness coefficient S is introduced, which allows the characterization and classification of different types of dust. The dustiness coefficient for different dust types used in process industries is presented.
Dustiness Bulk material Safety characteristics Dust ezplosion
Frank Hauert S.Radandt
FSA (Research Centre for Applied System Safety and Industrial Medicine) Dynamostr.7- 11, 68165 Mannheim, Germany
国际会议
沈阳
英文
28-31
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）