The effect of coal desulfurization on flotation through ultrasonic treatment

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:324835

Jun, Hu; Jianqi, Chen ^[1]

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1. China Univ. of Mining and Technology (China)

This paper carries out a study on the influence of ultrasonic treatment upon the changes of these aspects: pulp particle granularity, dissolving oxygen, pulp pH, surface potential (x), pulp potential (Eh) and conductivity rate, through the introduction of primary application and functional mechanism of ultrasonic wave such as ultrasonic comminution, ultrasonic cleaning and ultrasonic atomization. The effect of ultrasonic pretreatment on the size composition of the feeds and the floatability of coal and pyrite is examined. The tests affected the size composition of raw coal distinctively and caused the removal of sulfur from coals. It has been found that ultrasonic pretreatment of slurry enhances the differences in physico-chemical surface properties of coal and pyrite. In this case it is possible to obtain low-sulfur coals from high-sulfur coals. This may be explained by the different effects of ultrasonic vibrations on coal and pyrite which cause some improvement of the selectivity of their flotation separation. According to the authors` research, it explores the feasibility of flotation desulfurization by means of ultrasonic reinforcement, and puts forward that ultrasonic treatment of a slurry under the appropriate period of time, sonic frequency and energy density, along with appropriate flotation process and coal pyrite depression method, can achieve the best effect of flotation desulfurization. It offers a new method or means to gain abstraction of the clean coal.

• OSTI ID: 324835
• Report Number(s): CONF-970931--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AUGMENTATION
COAL PREPARATION
DESULFURIZATION
EFFICIENCY
FLOTATION
PYRITE
REMOVAL
ULTRASONIC WAVES