and engineering journal . s often taken for granted that the initial steps beginafter the ore has been hoisted to the surface and deliveredto the reduction department. On some mines this can beaccepted us the starting point for the beneficiation of the dilution, cannoi be ignored withoul the payment of thescale in pipes, or the purchase of an The precise eh mica! control appi als to thiand mineownei as a mi ana E saving 1 material used und< rground i mention tb I cyanide af the surface planl \- an i - imple th\ coming in contact with an accumu-. Modern Rand Metallurgy— A View at S


and engineering journal . s often taken for granted that the initial steps beginafter the ore has been hoisted to the surface and deliveredto the reduction department. On some mines this can beaccepted us the starting point for the beneficiation of the dilution, cannoi be ignored withoul the payment of thescale in pipes, or the purchase of an The precise eh mica! control appi als to thiand mineownei as a mi ana E saving 1 material used und< rground i mention tb I cyanide af the surface planl \- an i - imple th\ coming in contact with an accumu-. Modern Rand Metallurgy— A View at Springs Mines. ore. On others, however, natural chemical processes, whichaffect the subsequent treatment, begin in the stope, the orepass and the pump sump, and it is due to the recognition oithis fundamental fact that one large gfoup has begun oretreatment underground and has extended the responsibilityand usefulness of the chemist and mdtiallurgist. I alludeto the chemical control of neutralisation of acid mine waterby means of lime, the settlement of sludge, its subsequentdisposal, and the maintenance of a favourable composition>i water for re-use in dust allaying, in which there are pitfalls unseen except by the trained chemist. The precipita-tion, from a super-saturated mine water, of the calciumsulphate formed in neutralising or its prevention by adequate lation of milk of lime in some back water undergri und. Theone points to the moral of the usefulness oi information onthe degree of acidity; the other, oi wastefulness limewhen not applied


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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries