Process for removing ash from coal

Details Process for removing ash from coal Process for removing ash from coal

1981-11-10

1984-06-26

Chiesa, Richard L.

Classifying, separating, and assorting solids

Adhesion

Coated surface or mass

209170, 209171, 210704, B07B 1300

Patent

active

044565283

ABSTRACT:
Mineral impurities can be effectively removed from coal by introducing oil droplets into an aqueous slurry of pulverized coal. Coal, which is lipophilic, attaches to the surface of the oil droplets and floats upwardly along with the oil droplets utilizing their buoyancy. On the other hand, mineral impurities, which are hydrophilic, are left in the aqueous slurry.

REFERENCES:
patent: 787814 (1905-04-01), Wolf
patent: 2744626 (1956-05-01), Reerink et al.
patent: 3045818 (1962-07-01), Muschenborn et al.
patent: 4089776 (1978-05-01), McMurray
patent: 4272250 (1981-06-01), Burk, Jr. et al.
patent: 4288231 (1981-09-01), Taylor
patent: 4332593 (1982-06-01), Burgess et al.

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