Technique to Investigate Pulverizing and Abrasive Performance of Coals in Mineral Processing Systems

Wojciech Grzegorzek, Daniel Adamecki, Grzegorz Głuszek, Aleksander Lutyński and Daniel Kowol
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Wojciech Grzegorzek: Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology, 44-100 Gliwice, Poland
Daniel Adamecki: Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology, 44-100 Gliwice, Poland
Grzegorz Głuszek: Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology, 44-100 Gliwice, Poland
Aleksander Lutyński: KOMAG Institute of Mining Technology, 44-100 Gliwice, Poland
Daniel Kowol: KOMAG Institute of Mining Technology, 44-100 Gliwice, Poland

Energies, 2021, vol. 14, issue 21, 1-15

Abstract: The operating costs of breaking coal particles into fine powder, to achieve optimum combustion for the boilers in a power plant, are made up of power input to carry on an energy intensive comminution mechanism and to overcome friction losses within pulverising machines. The operating costs also include the cost of the replacement of the processing system’s components due to wear. This study presents the development and application of an attrition test machine that enables an investigation of the factors that influence pulverizing efficiency. The attrition tester simulates grinding conditions in real vertical spindle mills. In this kind of mill, as with the tester, the size reduction process results from a shearing action during the redistribution of the coal particles. The redistribution and attrition within the coal bed are forced by movement of the rollers (or by a disc rotation, in the case of the tester). The testing method was oriented toward mechanical properties, i.e., internal friction shear strength, abrasiveness and grindability. This method enables facilitated testing procedures and a more exact simulation of grinding in vertical spindle coal mills. Ball-race mills and Loesche roller mills were used.

Keywords: attrition test machine; coal mechanical properties; abrasiveness and grindability; internal friction; coal bed breakage test (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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