Principles of gravity separation
All gravity separators utilize the same principles to effect a separation. Once these principles are understood, it is usually a simple step to adjust a gravity separator to produce optimum separation. The term "Gravity Separator" is a contraction of the proper name "Specific Gravity Separator" which means, a separator of particles differing in their specific gravities. About 250 B.C., Archimedes discovered the law of specific gravity which is ALL BODIES FLOATING IN OR SUB4E1ED IN A LIQUID ARE BUOYED UP BY A FORCE EXACTLY EQUAL TO THE WEIGHT OF THE LIQUID THEY DISPLACE. The specific gravity of a particle is the ratio of its density to some standard substance, the standard usually employed being water with a unit of 1. Particles having a specific gravity of less than 1 will float and particles with a specific gravity greater than 1 will sink. Gravity separators use air as a standard rather than water. Since air is lighter than water, the relative difference between particles of differing weights is widened. For this reason, the gravity separator is a very sensitive machine and when operated correctly can produce a very precise separation.
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| Publication | Forest Nursery Proceedings |
|---|---|
| Event | Eureka, CA - 1978 |
| Author | Jim Thomas |
| Published | 1978/10/01 |
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