Precombustion desulfurization using Microcel{trademark} and multi-gravity separator
- Virginia Polytechnic Institute and State Univ., Blacksburg, VA (United States)
Studies conducted at the Center for Coal and Minerals Processing (CCMP) indicate that surface-based processes such as froth flotation are inefficient in removing pyrite from fine coal. This shortcoming has been attributed to the fact that pyrite can become hydrophobic under certain conditions and to the inability of flotation to reject middling particles. To overcome these deficiencies, a new processing scheme has been developed at CCMP which involved the use of the Microcel{trademark} flotation column in combination with a centrifugal flowing-film separator, called a Multi-Gravity Separator (MGS). The flotation column removes ash-forming minerals such as clay, while the MGS is effective in removing pyrite. Preliminary test data obtained with high-sulfur coals shows that this processing scheme can nearly double the pyritic sulfur rejection with little loss in clean coal yield. This article discusses the underlying principles of the new circuit and provides test results obtained using eastern U.S. coals.
- Research Organization:
- USDOE, Washington, DC (United States); Korea Electric Power Corp. (KEPCO), Seoul (Korea, Republic of)
- OSTI ID:
- 81460
- Report Number(s):
- CONF-941089--Vol.2; ON: DE95011613
- Country of Publication:
- United States
- Language:
- English
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