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Preconcentration of Native Copper Ore by Electronic Sorting.

PB285204

Publication Date	1978
Personal Author	Miller, V. R.; Nash, R. W.; Schwaneke, A. E.
Page Count	20
Abstract	The Bureau of Mines developed and evaluated a detector-sorting device to separate the copper-bearing portion from the barren portion of Michigan native copper ore in the minus 4-inch plus 1-inch size range. The research was part of an effort by the Bureau to develop new and improved technology to aid in the restoration of mining in the Michigan native copper district. Small scale sorting tests were also conducted on minus 1-inch plus 1/2-inch size material from the Centennial mine using a previously developed system that was modified to increase sensitivity. Results showed that with the added sensitivity, 85 to 90 pct of the copper in the minus 1-inch plus 1/2-inch size material could be recovered in about 50 to 60 pct of the fraction. Sorting tests on minus 4-inch plus 2-inch and minus 2-inch plus 1-inch size fractions from the Centennial mine were conducted with the large sorting system. Results showed that 86 to 93 pct of the copper was recovered in 43 to 64 wt-pct of the sorted fractions. Combining of concentrates from the two fractions resulted in a recovery of 90 pct of the copper in 55 pct of the weight.
Keywords	Copper ores Electrostatic separators Electric concentrators Detectors Process charting Particle size Beneficiation Keweenaw Peninsula Michigan
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Rolla, MO. Rolla Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197825

Preconcentration of Native Copper Ore by Electronic Sorting.

Preconcentration of Native Copper Ore by Electronic Sorting.
PB285204

Publication Date	1978
Personal Author	Miller, V. R.; Nash, R. W.; Schwaneke, A. E.
Page Count	20
Abstract	The Bureau of Mines developed and evaluated a detector-sorting device to separate the copper-bearing portion from the barren portion of Michigan native copper ore in the minus 4-inch plus 1-inch size range. The research was part of an effort by the Bureau to develop new and improved technology to aid in the restoration of mining in the Michigan native copper district. Small scale sorting tests were also conducted on minus 1-inch plus 1/2-inch size material from the Centennial mine using a previously developed system that was modified to increase sensitivity. Results showed that with the added sensitivity, 85 to 90 pct of the copper in the minus 1-inch plus 1/2-inch size material could be recovered in about 50 to 60 pct of the fraction. Sorting tests on minus 4-inch plus 2-inch and minus 2-inch plus 1-inch size fractions from the Centennial mine were conducted with the large sorting system. Results showed that 86 to 93 pct of the copper was recovered in 43 to 64 wt-pct of the sorted fractions. Combining of concentrates from the two fractions resulted in a recovery of 90 pct of the copper in 55 pct of the weight.
Keywords	Copper ores Electrostatic separators Electric concentrators Detectors Process charting Particle size Beneficiation Keweenaw Peninsula Michigan
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Rolla, MO. Rolla Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197825