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Improved grindability of taconite ores by microwave heating.

Authors
Walkiewicz-JW; Lindroth-DP; Clark-AE
Source
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9559, 1995 Jan; :1-16
Link
NIOSHTIC No.
20039277
Abstract
The U.S. Bureau of Mines has conducted studies to utilize rapid microwave heating to stress fracture ore samples. Iron ores containing hematite, magnetite, and geothite were subjected to microwave energy in batch operations at 3 kW and heated to average maximum temperatures between 840 and 940 deg C. Standard Bond grindability tests showed that microwave heating reduced the work index of iron ores by 10 to 24 pct.
Keywords
High-temperature-tests; Hematite; Magnetite; Taconite; Microwaves; Fracturing; Grindability; Microwave-radiation; Temperature-effects; Temperature-measurement
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB95-242152
NTIS Price
A03
Identifying No.
RI-9559
NIOSH Division
RERC
Source Name
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9559
State
NV
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