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The Iron Age 1885-01-01: Vol 35 Iss 1

1885 Reed Business Information US

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The Iron Ao’ TO MATTE INDEX READING PAGE A R Review of the Hardware, Iron and Metal Trades. Published every Thursday Morning by Davip Wriuiams, No. 83 Reade Street, New York. Entered at the Post Office, New York, as Second-Ulass Matter. METALLURGICAL NOTES. Magnetic Ore Dressing. According to a paper read by Herr O. Heberle, at a meeting of German engineers of the Central Rhenisch district, says Engi neering, a large amount of ore is treated by magnetic dressing and separating at the Friedrichsegen Mine. The ore in question is a mixture of zinc blende and spathic iron Sore, the two minerals being so nearly of the same specific gravity that their separation by ;sual methods cannot be carried out, so that! for the past ‘three years recourse has been Shad to the magnetic process. The material | io be treated comes partly as hand-picked | lumps and partly as a product of hydraulic | dressing of the ores from the mine. The hand-picked portion is in pieces from 40| mm. to 120 mm. (1.6 inches to § inches) diameter, while that from the hydraulic iressing is in bits of 6 mm. (.24 inch) diam- Geter and less. The treatment of this mate rial comes under three heads: 1, the cal- cination of the…

Citation

The Iron Age 1885-01-01: Vol 35 Iss 1. Reed Business Information US. 1885.