Magnetic Separation of Weakly Magnatic Copper Minerals

High Gradient Magnetic Separation of small (5-38 µm) weakly magnetic copper mineral particles from a copper concentrate and ore has been performed. In previous work coarser fractions of these minerals, bornite and chalcopyrite, were separated successfully. The recovery of the smaller particles in the magnetic fraction decreases but their grade increases compared to the results obtained on the larger particles. At a magnetic background field of 1.3 T the concentrate was upgraded from 72% bornite and chalcopyrite to 86% with a recovery of 82% and the ore from 16% magnetic minerals to 44% with a recovery of 72%.

Development of H.G.M.S. Techniques for Biological Cell Separation

High Gradient Magnetic Separation (HGMS) for biological specimens is reviewed. Selective tagging for the enhancement of cell capture is discussed. A detailed survey of major improvements in HGMS techniques -- filter matrix designs and magnet designs aimed specifically at bench-top experiments in bioseparation -- is also given.

Treatment of Drinking and Irrigation Water in Animal and Plant Husbandry by Electromagnetic Technology

A survey is given of recent preliminary results of a broadbased investigation in Israel of the potentially beneficial effects of the magnetic treatment of water on plant and animal husbandry.

Magnetic Field Effect in the Process of Rinsing a Magnetic Separator Matrix

This paper surveys fundamental aspects of the problem of rinsing matrices in high gradient magnetic separators. This is done, for the first time, in terms of the magnetic circuit design. Equations have been constructed to describe the effects of spurious remanent magnetic fields on the rinsing process.