On the Beneficiation of Gravel and Crushed Stone

Recntly in Japan, the demand of aggregate for concrete and road construction has increased enormously and it has therefore been necessary to use crushed stone in place of river gravel. Here arises an importance of the preparation technique of high quality crushed stone.Among the various processes of Benef iciating gravel and crushed stone, jigging process such as Remer jig and heavy media separation process has been carried out successfully in some foreign countries.