|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(5) [September 2005] >
| Title: | Effect of some commercial flocculating agents on settling and filtration rates of low grade, fragile manganese ores of Andhra Pradesh |
| Authors: | Kanungo, S B |
| Keywords: | Manganese ore fines
flocculation
polymeric flocculants
settling and filtration rates
specific cake resistance |
| Issue Date: | Sep-2005 |
| Publisher: | CSIR |
| IPC Code: | C02F1/52 |
| Abstract: |
The highly
weathered, fragile and low grade manganese ores of Visakhapatnam district of Andhra Pradesh are
subjected to wet high intensity magnetic separation (WHIMS) to give
beneficiated magnetic fraction. However, the original ore and its non-magnetic
fraction contain large quantities of slimy particles which are difficult to
separate from their aqueous suspensions. Three different commercial
flocculating agents with anionic, cationic and non-ionic characters have been
used to improve settling and filtration behaviour of the suspensions. While a
small dose of anionic flocculant has been found to be very effective, cationic
flocculant is poorly effective even at high dosage. The behaviour of non-ionic
flocculant is intermediate between the two. Since extremely fine particles
constitute the non-magnetic fraction, it needs higher dosage of anionic
flocculant to form large or aggregated flocs which make the filter cake porous
even with increasing slurry concentration.
|
| Page(s): | 550-558 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(5) [September 2005]
|
|
