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Reduction Roasting and Beneficiation of a Hematitic-geothitic Taconite.

Authors
Peterson-RE; Colombo-AF
Source
MISSING :20 pages
Link
NIOSHTIC No.
10006681
Abstract
A reduction roasting-magnetic separation-flotation process for beneficiating oxidized taconite from the Western Mesabi Iron Range in Minnesota was evaluated in a Bureau of Mines research program to insure an adequate supply of raw materials for future ironmaking and steelmaking needs. The research was performed on a sample containing 35.4 pct iron and representing a deposit of approximately 2 billion tons of raw materials. An average of 1,419 lb of oxidized taconite and 37 lb of lignite reductant per hour were fed to a 35- foot rotary kiln in which the iron oxides were converted to artificial magnetite. The kiln was heated with pulverized lignite and natural gas. Most of the dust collected from the kiln exhaust was pelletized and recycled to the kiln. Magnetic separation and cationic flotation of the roasted material in a 900-lb/ft pilot plant produced a concentrate analyzing 67.9 pct iron and 4.9 pct silica and containing 69.2 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 8549
NIOSH Division
TCRC;
Source Name
MISSING
State
MN;
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