Development of enhanced sulfur rejection processes. Second quarterly technical progress report, January 1, 1993--March 31, 1993
Research at Virginia Tech led to the development of two complementary concepts for improving the removal of inorganic sulfur from many eastern US coals. These concepts are referred to as Electrochemically Enhanced Sulfur Rejection (EESR) and Polymer Enhanced Sulfur Rejection (PESR). The EESR process uses electrochemical techniques to suppress the formation of hydrophobic oxidation products believed to be responsible for the floatability of coal pyrite. The PESR process uses polymeric reagents that react with pyrite and convert floatable middlings, i.e., composite particles composed of pyrite with coal inclusions, into hydrophilic particles. These new pyritic-sulfur rejection processes do not require significant modifications to existing coal preparation facilities, thereby enhancing their adoptability by the coal industry. It is believed that these processes can be used simultaneously to maximize the rejection of both well-liberated pyrite and composite coal-pyrite particles. The technical research was initiated on October 1, 1992, and a detailed work plan and work schedule were developed. During this reporting period, research was conducted to evaluate the liberation characteristics of various pyrite samples, to determine the electrochemical reactions that influence the hydrophobicity of pyrite, and to examine the potential use of electrochemical methods for controlling the flotation and depression of pyrite.
- Research Organization:
- Virginia Center for Coal and Minerals Processing, Blacksburg, VA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-92PC92246
- OSTI ID:
- 10171834
- Report Number(s):
- DOE/PC/92246--T2; ON: DE93018899
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of enhanced sulfur rejection processes. Final technical progress report, July 1--September 30, 1993
Development of enhanced sulfur rejection processes. Final technical progress report: Seventh quarter, April 1, 1994--June 30, 1994