鉱山の粉じん抑制に関する基礎的研究 (第1報)

粉じんの帯電性について

抄録

We have studied on the attempt to apply the electrostatic charge of dust particles to their suppression and collection.
In order to find out the dust suppressing properties of electrical neutralization, experiments were carried out with many powdered coal and rock materials and two-component mixtures of airborne dusts.
The results are summarized as follows:
1) The electrification of dust is affected by not only only its chemical composition, but also particle size, water content and velocity in a moment of injection or air pressure for thet action, e.t.c., .
2) Many silicates which caused silicosis are negatively charged, on the other hand, harmless dusts are generally electrified with positive charge.
3) The floatability of airborne dusts is suppressed by mixing with them the charged-dusts which have polarities opposite.