METHOD OF PREPARING BROWN-COAL ALKALINE REAGENT Russian patent published in 1997 - IPC

Abstract RU 2071969 C1

FIELD: drilling fluids. SUBSTANCE: reagent for treating drilling muds is prepared as follows. Crushed coal with particle size up to 13 mm, prior to be mixed with alkali, is simultaneously dried, oxidized, and classified in gas-air flow containing 16-20% oxygen. Velocity of gas-air flow is adjusted in such a way that dry coal transferred from the vertical part of classifier to be combined with alkali has particle size up to 3 mm and dustlike fraction with particle size up to 0.2 mm was entrained by gas flow. EFFECT: simplified process. 2 cl, 5 tbl

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RU 2 071 969 C1

Authors

Gavrilov B.M.

Golovin G.S.

Gorlov E.G.

Mojsa Ju.N.

Dates

1997-01-20—Published

1994-07-22—Filed