The flotation process . June 1911 on the exhaustion of the dumps. In connection with the Minerals Separation plant, it is importantto note that the fact of the circuit being no longer acid, but neutral,has been taken advantage of, inasmuch as there is only one circuitthrough iron grinding-pans, agitators, and spitz-boxes. The original FLOTATIOX AT THE CENTRAL MINE, BROKEN HILL 123 granulation plant, being designed for an acid circuit, was equippedoriginally with wood throughout where liquor circulated, and withdry-crushing ball-mills for the same reason. Later, wet crushingwas adopted, but wit
The flotation process . June 1911 on the exhaustion of the dumps. In connection with the Minerals Separation plant, it is importantto note that the fact of the circuit being no longer acid, but neutral,has been taken advantage of, inasmuch as there is only one circuitthrough iron grinding-pans, agitators, and spitz-boxes. The original FLOTATIOX AT THE CENTRAL MINE, BROKEN HILL 123 granulation plant, being designed for an acid circuit, was equippedoriginally with wood throughout where liquor circulated, and withdry-crushing ball-mills for the same reason. Later, wet crushingwas adopted, but with a fresh-water circuit, kept carefully separatefrom the acid circuit in which the actual separation took place. Thesuccessful development of the flotation process, however, has enabledboth crushing and separation to be conducted in one and the samecircuit, and has thus greatly simplified operations. The liquor that was circulated through the Minerals Separationplant was approximately 25,000 gallons per hour. During the. Fig. 23. the plant at the central mine. course of operation, therefore, over 600,000,000 gal.—equal to nearly3,000,000 tons—has passed through the 12 iron grinding-pans of thisplant without detrimental effect. No stronger evidence could beproduced as to the freedom of the circuit-liquor from maintenance charges on these iron pans are no heavier thancorresponding charges on exactly similar grinding-pans in the lead-mill crusher-section, where fresh water only is used. Following exhaustive experiments in the laboratory, various mediahave from time to time been used for long periods on the commercialscale, both in substitution for and in combination with oleic among such media are amyl alcohol, resin-oil, camphor-oil,pine-oil, and eucalj^ptus, with all of which ingredients good workhas been obtained. Thus Nature, in close proximity to the vastbodies of complex ore, has provided the means for the concentrationof such ores, for the essenti
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Keywords: ., bookcentury1900, bookdecade1910, bookidflotationpro, bookyear1916
