Process for improving the quality of upgraded brown coal

Details Process for improving the quality of upgraded brown coal Process for improving the quality of upgraded brown coal

C - Chemistry, Metallurgy

10

L

44/39, 44/50

C10L 5/12 (2006.01)

Patent

CA 1281185

A B S T R A c T Densified coal pellets of improved physical properties and enhanced calorific value are produced by a process which includes subjecting coal to a shearing-attritioning step followed by extrusion and drying steps, characterised by incorporating an additive into the coal that is subject to the said shearing-attritioning step, said additive being chosen from one or more of the group consisting of: alkali metal hydroxides, alkaline earth metal hydroxides, ammonium hydroxide, alkali metal carbonates:, alkaline earth carbonates, oxides of base metals, oxides of transition metals, and small molecule carbonyl compounds.

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