Feasibility of thermal treatment of high sulfur coal wastes

Zilberchmidt, M; Shpirt, M; Komnitsas, K; Paspaliaris, I

dc.contributor.author	Zilberchmidt, M	en
dc.contributor.author	Shpirt, M	en
dc.contributor.author	Komnitsas, K	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T02:42:47Z
dc.date.available	2014-03-01T02:42:47Z
dc.date.issued	2004	en
dc.identifier.issn	0892-6875	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31076
dc.subject	Calcium Carbonate	en
dc.subject	Climatic Condition	en
dc.subject	Coal Mining	en
dc.subject	Environmental Risk	en
dc.subject	Fuel Consumption	en
dc.subject	Heavy Metal	en
dc.subject	Iron	en
dc.subject	Laboratory Experiment	en
dc.subject	Magnetic Susceptibility	en
dc.subject	Phase Transformation	en
dc.subject	Secondary Production	en
dc.subject	Sulfuric Acid	en
dc.subject	Thermal Treatment	en
dc.subject	Thermodynamics	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Coal byproducts	en
dc.subject.other	Contamination	en
dc.subject.other	Drainage	en
dc.subject.other	Ecosystems	en
dc.subject.other	Environmental protection	en
dc.subject.other	Groundwater pollution	en
dc.subject.other	Hazardous materials	en
dc.subject.other	Health hazards	en
dc.subject.other	Heat treatment	en
dc.subject.other	Heavy metals	en
dc.subject.other	Leaching	en
dc.subject.other	pH effects	en
dc.subject.other	Phase transitions	en
dc.subject.other	Sulfur	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Wastes	en
dc.subject.other	Coal wastes	en
dc.subject.other	Mine drainage	en
dc.subject.other	Coal mines	en
dc.title	Feasibility of thermal treatment of high sulfur coal wastes	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.mineng.2003.10.026	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2003.10.026	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Coal mining and processing activities in Russia result in the generation of huge quantities of wastes containing elevated concentrations of residual S (S-t(d) = 2.1-9%), C (C-o(d) > 12%), heavy metals and other hazardous elements. These wastes which are usually piled or dumped without specific care close to mining sites and processing plants are subjected to adverse climatic conditions and in most cases cause severe impacts to various receptors. The worst impacts, in Russian mining and disposal areas, are due to the oxidation of the residual sulfide phases and the generation of coal mine drainage, with pH often ranging between 2.5 and 4. These acidic leachates contaminate severely soils, surface- and groundwater; therefore the risk for humans and ecosystems in these sites is considered as extremely high. The present paper examines the feasibility of thermal treatment of high sulfur coal wastes, in particular those containing elevated content of carbon, kaolin and iron, in order to reduce environmental risk at the disposal sites and produce saleable by-products. Carbon reduces substantially fuel consumption while kaolin and iron assist the formation of secondary products. Parameters studied include temperature and air excess ratios, up to 1400 degreesC and 1.4 respectively. Coal wastes were subjected to thermal treatment (a) as such, in order to study the removal of sulfur and the production of saleable products (sulfuric acid, various construction materials, products with high magnetic susceptibility, aluminum sulfate) and (b) after mixing with calcium carbonate in order to study the fixation of sulfur in multi-mineral phases possessing binding properties. Prior to implementation of laboratory experiments in order to assess the potential of thermal treatment, thermodynamic calculations were performed to determine optimum operating parameters and possible phase transformations. (C) 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Minerals Engineering	en
dc.identifier.doi	10.1016/j.mineng.2003.10.026	en
dc.identifier.isi	ISI:000189090900009	en
dc.identifier.volume	17	en
dc.identifier.issue	2	en
dc.identifier.spage	175	en
dc.identifier.epage	182	en