The Effects on the Mined Lignite Quality Characteristics by the Intercalated Thin Layers of Carbonates in Ptolemais Mines, Northern Greece

Autor:	Nestoras Kolovos, Anestis Filippidis, Andreas Georgakopoulos, Constantinos Kavouridis
Rok vydání:	2002
Předmět:	Thin layers General Chemical Engineering Energy Engineering and Power Technology Mineralogy Tailings chemistry.chemical_compound Fuel Technology chemistry Clastic rock Marl Carbonate Sedimentary rock Quality characteristics Geology
Zdroj:	Energy Sources. 24:761-772
ISSN:	1521-0510 0090-8312
DOI:	10.1080/00908310290086699
Popis:	The role of the thin intercalated carbonate sterile layers (marly limestones and carbonaceous marls) coexcavated with lignite in the Southern Field Mine, Ptolemais Basin, Northern Greece is investigated. For this purpose, laboratory mixtures of lignite-marly limestone and lignite-carbonaceous marl in different proportions are prepared and the quality characteristics of these mixtures are compared with those of the geological, the recoverable, and the mined lignite. The quality characteristics investigated are the ash content (db), the gross caloriec value (db), and the CaO.free/ content of the ash. The addition of marly limestone and carbonaceous marl to lignite by 10% increases the ash content (db) up to 33.7% and 21.1%, respectively, and the CaO.free/ content of the ash up to 79% and 57.3%, respectively, while reducing the gross caloriec value (db) by 12.9% and 8.4%, respectively. Marly limestones must be avoided as soon as possible in order to minimize the contamination impacts.
Databáze:	OpenAIRE
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