Method of removing carbonaceous particles, essentially free of p

Details Method of removing carbonaceous particles, essentially free of p Method of removing carbonaceous particles, essentially free of p

1989-03-21

1990-11-27

Lacey, David L.

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Selective differentiation

209166, B03D 102, B03D 110

Patent

active

049729560

ABSTRACT:
Carbonaceous coal particles, essentially free of pyritic sulphur, are removed from an aqueous coal slurry in two steps. In the first step the carbonaceous particles of the slurry, with the pyritic sulphur essentially free of surface conditioning agent, are micro-agglomerated with agglomerating oil added in an amount varying from about 0.5 wt % (dry basis), when the coal particle average size is about 100 microns, to about 10 wt % (dry basis) when the average coal particle size is about 4 microns to remove relatively coarser particles of pyritic sulphur. Then, without adding any further agglomerating oil, relatively finer pyritic sulphur particles trapped with water in the micro-agglomerates are removed.

REFERENCES:
patent: 4249910 (1981-02-01), Masologites
patent: 4272250 (1981-06-01), Burk
patent: 4564369 (1986-01-01), Burgess
patent: 4593859 (1986-06-01), Nakaoji

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