PROCEDIMIENTO DE FLOTACION ESPUMANTE PARA BENEFICIAR VALORESMINERALES ORGANICOS FOSILIZADOS

摘要

In a method for beneficiating coal or kerogen-containing oil shale values by froth flotation, improved recoveries and improved grades of the organic mineral values are obtained by first treating the ores containing them in an attrition milling apparatus to liberate the organic values from associated inorganic impurities. Attrition milling also provides special surface characteristics to the liberated organic values rendering them specially adapted for beneficiation by fine particle flotation. In accordance with the process, liberation is achieved by attrition milling for a time sufficient to provide particles of from about 1 to about 10 microns.