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Flocculation; graft copolymer; mineral industry effluent; chromite ore fines; settling velocity.

Graft copolymers are being experimented at the laboratory scale as flocculants. All the four graft copolymers, viz. starch-𝑔-polyacrylamide, amylopectin-𝑔-polyacrylamide, sodium alginate-𝑔-polyacylamide and carboxymethyl cellulose-𝑔-polyacrylamide performed well as flocculants on chromite ore fines suspension. Amylopectin-𝑔-polyacrylamide, in particular, performed superior to the rest of the series from the point of view of settling velocity of flocs which is the most important aspect in solid–liquid separation.

N C Karmakar¹ B S Sastry² R P Singh³

1. Department of Mining Engineering, Indian School of Mines, Dhanbad 826 004, India
2. Department of Mining Engineering, Indian Institute of Technology, Kharagpur 721 302, India
3. Materials Science Centre, Indian Institute of Technology, Kharagpur 721 302, India

Published

November 2002