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

Beneficiation of a Hematitic Taconite by Reduction Roasting, Magnetic Separation, and Flotation.

Authors
Peterson-RE; Colombo-AF
Source
MISSING :13 pages
Link
NIOSHTIC No.
10006713
Abstract
The Bureau of Mines has undertaken beneficiation investigations on samples representing large tonnages of oxidized taconites in order to develop and evaluate applicable technologies for producing iron oxide concentrates from these materials. Information derived from the investigations can be used to expand the domestic iron raw- materials base and to establish the impact these taconite deposits may have on future national iron ore requirements. This report describes a process that includes reduction roasting, magnetic separation, and flotation, applied to a Western Mesabi Range sample taken near Coleraine, Minnesota. The sample contained 36.8 pct iron and 46.0 pct silica, and represented 0.5 to 1 billion tons of crude materials. An average of 962 lb/hr of oxidized taconite was roasted with 33 lb/hr of lignite in a 35-foot-long rotary kiln. Pulverized lignite and natural gas maintained the kiln operating temperature at 850 deg. C. The roasted taconite was beneficiated by magnetic separation and cationic flotation in a 900-lb/hr pilot plant and yielded a product analyzing 68.1 pct iron and 4.6 pct silica, and containing 82.4 pct of the iron in the kiln feed.
Publication Date
19810101
Document Type
IH; Report of Investigation;
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
RI 8572
NIOSH Division
TCRC;
Source Name
MISSING
State
MN;
TOP