Advanced gravity separation

Gravity separation methods which exploit the difference in
densities of minerals to bring about a separation are the
oldest beneficiation techniques known to mankind.
Although with the advent of froth flotation, the relative
importance of gravity separation in twentieth century has
gone down, substantially higher tonnage of material is
treated by gravity concentration than by flotation. Gravity
separation is by far the most utilized concentration
technique and is an integral part of most mineral processing
flowsheets including the processing of coal, beach sands,
iron, gold, platinum, tin, tungsten and chromium ores.
Gravity based processes are comparatively more
economical and environment friendly.