Heavy media works well where there is typcially a good break between the high density and low density with a small amount of middlings. It does not matter if it is coal, zinc, tungsten, etc. The needs to be a god break. The Tennessee mines ran a heavy media separation at 5 to 10,000 tons per day.
Heavy Media Gravity Separation Heavy media gravity separation involves using a mixture of fine media material, such as magnetite or ferrosilicon , suspended in a slurry of water, to produce a media slurry with a specific gravity that will allow low density material to float, and other high density material to sink.
The heavy media separation process, or HMS, employing ferrous media, usually ferrosilicon and/or magnetite, is the most generally used process for sink float separations. A stable medium over the range of specific gravities from 1.25 to 3.40 can be maintained within close limits and is cleaned and recovered by magnetic means.
Introduction Heavy media separation , also called dense media or float¬sink separation, is one of the newer forms of gravity concentration. Though the concept can be traced to the last century, the process has enjoyed its major growth since 1940. Heavy liquid separation is a mutation.
The role of Ferrosilicon in heavy media gravity separation in mineral processing. The mineral processing industry widely makes use of heavy media gravity separation, as this offers an effective en economical method to process minerals, separating minerals from other material.