磁選法の研究 (第1報)

常, 反磁性鉱物から成る単体粒子に作用する磁力

抄録

In magnetic separation, an exact relation between magnetic force acting on a mineral particle under a given field conditions and its definite magnetic susceptibility have a fundamental importance for practical applications of the process.
The writer theoretically induced the above mentioned relation concerning a spherical cubic and cylindrical mineral particles. These relations were formulated in the equation of (20), (32) and (36).
In the case of paramagnetic or diamagnetic mineral particles, the value of their susceptibility remains constant for a fairly wide range of magnetic field so their theoretical analysis of the relation is not so difficult. While in the case of ferromagnetics their susceptibility depends on the field strength furthermore the induced demagnetizing field make the relation more complex.
In this article, the writer reported the magnetic forces of paramagnetic and diamagnetic mineral particles of quartz, calcite, epidote, chalcopyrite, pyrite, rutile, ilmenite and zircon and determined the field intensities to attract these paramagnetics. These were calculated by the above equation. The results were illustrated in Table 1.