New technology and equipment for coal slime recovery in China
- China Mining and Technology Univ., Beijing (China)
Yearly output of the medium and small coal mines in China has reached 7.7 hundred million tons. Most coal slime from these coal preparation plants are abandoned, and thence the environment is seriously polluted. Recently, a new technology and equipment for coal slime recovery has been developed. The key equipment of the technology is the cyclone-column flotator. To recover the coal slime, a system consisting of cyclone-column flotator and plate frame filter is used. The cyclone-column flotator is a short body flotator specially designed for flotation of coal with difficult floatability. It consists of a flotation segment on the top and a cyclone segment at the bottom, the later being a supplement of flotation processing. As a result, the separation and recovery are enhanced. Compared with traditional flotation machine--vacuum filter system, this technology has the following advantages: (1) suitable for most types of coal; (2) higher selectivity (the ash content in clean coal dropped by 1--2%); and (3) the system is simple and reliable with lower operation cost. The investment dropped by 40--50%, and power consumption, by 30--40% under the same processing capacity. This technology system, featuring convenience, easy operability, high efficiency and high quality is specially suitable for medium and small coal preparation plants. There are over ten coal preparation plants employing this technology system with success.
- OSTI ID:
- 349122
- Report Number(s):
- CONF-980985-; ISBN 1-890977-15-2; TRN: IM9924%%122
- Resource Relation:
- Conference: 15. annual international Pittsburgh coal conference, Pittsburgh, PA (United States), 14-18 Sep 1998; Other Information: PBD: 1998; Related Information: Is Part Of Fifteenth annual international Pittsburgh coal conference: Proceedings; PB: [1500] p.
- Country of Publication:
- United States
- Language:
- English
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