Method of separating carbonaceous coal from an aqueous slurry

B - Operations – Transporting – 03 – D

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361/2

B03D 1/02 (2006.01) B03B 1/04 (2006.01) B03B 9/00 (2006.01)

Patent

CA 1321038

TITLE "A Method of Separating Carbonaceous Coal From An Aqueous Coal Slurry" INVENTORS Charles E. Capes Kevin A. Jonasson William L. Thayer ABSTRACT OF THE DISCLOSURE : In a method of agglomerating carbonaceous coal comprising first agglomerating impurity liberated carbonaceous coal, from an impurity liberated coal slurry, with agglomerating oil to form open structured, chain-like, micro-agglomerates and then forming relatively larger, less open structured more robust agglomerates from a portion of the slurry to provide a mixture of micro-agglomerates, relatively larger, more robust agglomerates, water and any inorganic impurities that may be present. The relatively larger, more robust agglomerates are screened and then the micro-agglomerates are separated using an aerating, skimmer tank leaving an inorganic impurity laden waste water. The micro-agglomerates are rendered buoyant by the aeration and are thus rendered separable from the inorganic laden waste water which may be further treated to remove the inorganic waste to provide water for recirculation.

543310

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