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- W958007410 abstract "Publisher Summary This chapter explains that mining is designed to first liberate the coal from the host clastic rock and beneficiation to liberate higher grade coal and discard stone and poorer quality coal through a process of comminution, density separation, and flotation that is controlled by particle size and surface chemistry. For mines producing thermal coals, keeping rank and grade to specification is the prime task, along with tracking deleterious trace elements in product and reject. For mines producing metallurgical coal products, coal type or vitrinite content is an added factor as are element distributions such as phosphorus and sulphur. The chapter also highlights the different ways of estimating coal strength and hardness—compressive strength, fracture toughness, or grindability—but all will show a trend relative to rank, type, and grade of the coal. The measurement of coal strength is affected by the size of the test specimen, the orientation of stress relative to banding, and the confining pressure of the test." @default.
- W958007410 created "2016-06-24" @default.
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- W958007410 date "2008-01-01" @default.
- W958007410 modified "2023-09-25" @default.
- W958007410 title "Mining and Beneficiation" @default.
- W958007410 doi "https://doi.org/10.1016/b978-0-08-045051-3.00003-8" @default.
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