Ohrožení potrubních rozvodů spalin průmyslových sléváren deflagrací kovových prachových částic

Abstract

The aim of the work was to carry out laboratory tests of a collected sample of settled dust in the flue gas pipelines of recycling facilities and preheating of aluminum chips, using the heat recovery of flue gas from industrial foundries. The device is located within industrial plant of Maxion Wheels Czech s.r.o. located in Ostrava. The goal was to find out the characteristics of the dust and to determine its danger, because this dust was not included among the tested samples as part of the anti-explosion documentation. The test methods used were sieve analysis, due to the separation of the portion of the sample with a particle size of less than 0,5 mm and to determine the average grain size of the separated portion, determination of bulk density for approximate calculation of the thickness of the dangerous layer of dust and determination of the maximum explosion pressure and the lowest explosive concentration of dust.