Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Effect of oxidation on the flotation of chromite and associated minerals.

Authors
Kotlyar-DG; Tolley-WK; Rice-DA
Source
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9575, 1995 Jan; :1-10
Link
NIOSHTIC No.
10005881
Abstract
The effects of oxidation on the floation of chromite and olivine were studied in an effort to improve chromite recovery from domestic sources. The flotation behavior of pure chromite, pure olivine, and a chromite gravity concentrate were investigated. Freshly prepared chromite floated well between pH 2.2 and pH 4.5, but floated poorly at pH greater than 5. Oxidation at 150 deg. C increased chromite floatability above pH 5 to about 30%. In contrast, oxidation did not measurably affect olivine flotation. This suggested that controlled oxidation may improve selectivity in the flotation of chromite from olivine. This concept was tested using a chromite gravity concentrate. Both flotation recovery and Cr2O3 grade increased slightly following oxidation of the concentrate. Although the benefit from oxidation was small, this result shows some promise for improving flotation selectivity using oxidation.
Keywords
Oxide-minerals; Olivine; Silicate-minerals; Separation; Concentration-composition; pH; Electrical-potential; Surface-chemistry; Flotation; Oxidation; Materials-recovery; Chromites
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB96-107099
NTIS Price
A02
Identifying No.
RI-9575
NIOSH Division
SLRC
Source Name
Salt Lake City, UT: U.S. Department of the Interior, Bureau of Mines, RI 9575
State
UT
TOP