DBPapers
DOI: 10.5593/SGEM2016/B13/S06.116

IDENTIFICATION OF THE PYROPHORIC SULFIDES COLLECTED FROM THE WASTES OF THE EQUIPMENTS AFFECTED BY FIRE OR EXPLOSION

A. Szollosi-Mota, C. Lupu , M. Prodan, I. Nalboc
Tuesday 6 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-57-5 / ISSN 1314-2704, June 28 - July 6, 2016, Book1 Vol. 3, 921-926 pp

ABSTRACT
The iron sulfide is a pyrophoric material, that can ignite spontaneously in contact with air. It may be formed when iron oxide (rust) is converted into iron sulfide in an environment where no oxygen is present where the concentration of hydrogen sulfide (H2S) is greater than the concentration of oxygen. When the iron sulfide is exposed to air, it is oxidized to form iron oxide or carbon dioxide or sulfur. This chemical reaction between iron sulfide and oxygen generates a considerable amount of heat. In fact, so much heat is released, that the individual particles of iron sulphide become incandescent and burn. This amount of heat can become a source of initiation both to explosions or fire.
For this work direct and indirect identification tests have been performed for the pyrophoric sulphides composition from unknown samples collected from the place where an explosion or fire was produced.

Keywords: pyrophoric sulphides, fire, explosion