Abstract:

The conventional process of sending filter liquor of pressure filter back to flotation system brought about some problems to the flotation system: the flotation system is under greater pressure when flotation feed quantity increase; flotation effect is worse with the vicious circle of fine slime in flotation system. To recover clean coal in filter liquor and improve coal slurry treating process, a new “flotation column + quick-operating pressure filter” filter liquor independent recovery process is put out. Feasibility of this process is proved through experiments, according to the results, implementation of this process can get qualified clean coal , reduce flotation feed quantity greatly and relieve flotation pressure, improve flotation effect and increase clean coal recovery.

Key words: filter liquor, independent recovery, flotation column, quick-operating pressure filter