Show TREATMENT OF LOW GRADE ORES possibly no branch of metallurgy has received more attention during the past few years than that pertaining to the concentration cent ration and leaching of low grade ores research and and the success attending experimental work has resulted in the evolving of new processes which can successfully cess fully handle ores which formerly were thrown over the dump or stored away awaiting the day when science would find a way for their profitable treatment the almost complete success of several new methods for the recovery of values from ores heretofore not susceptible to treatment by any known process has had the effect of stimulating activity and endeavor in many of the mining camps of the west the result being that many plants are being installed throughout this intermountain region which are utilizing leaching and flotation practices both of which have been demonstrated to be all that has been claimed for them As a matter of fact the treatment of low grade copper ores by either acid leaching or oil flotation is beginning to assume great proportions and any literature pertaining to either or both of these methods is being eagerly sought for by mining men throughout the west and south hoovers concentration cent ration ores by flotation is one of the latest works on this interesting subject while the technical press is publishing many valuable and instructive articles on copper leaching owing to the time and study that is now being given to the subjects of leaching and concentration by flotation the day cannot be far distant when almost any ore even if very low in its metallic content can be successfully and profitably treated 0 |