Gold South African

Virnig, M. J. Mackenzie, J. M. W. Adamson, C. The use of guanidine-based extractants for the recovery of gold. Symposium Series—South African Institute of Mining and Metallurgy 1996, S16, 151-156. 

Sour natural gas, 23 597 Sour syngas defined, 6 829 Sour taste, 11 566 South Africa, platinum-group metal deposits in, 19 604, 612 South African gold mines, 12 686 South African manganese mining, 15 555 South America... 

Meyer, F.M., Robb, L.J., OberthOr, T., Saager, R. Stupp, H.D., 1990. Cobalt, nickel, and gold in pyrite from primary gold deposits and Witwatersrand reefs. South African Journal of Geology, 93, 70-82. 

South African gold mining became big business in 1890, thanks to a process called cyanidation that separated the metal from its ore. Invented by Scottish chemist John Stewart MacArthur (who profited from it until his patent was declared invalid in 1896), this involved treatment of the ore slurry with cyanide to form a soluble... 

Filmer, A.O. (1982). The dissolution of gold from roasted pyrite concentrates. Journal of the South African Institute of Mining and Metallurgy, 90-94. 

McDougall, G.J., Hancock, R.D., Nicol, M.J., et al. (1980). The mechanism of adsorption of gold cyanide on activated carbon. J. South African Inst. Mining MetalL, 80, 344-56. 

ERASMUS, L.D. (1957) Scleroderma in gold miners on the Witwatersrand with particular reference to pulmonary manifestations. South African Journal of Clinical Laboratories, 3, 209-231. 

Tailings from many South African gold mines contain sufficient uranium to permit its recovery at competitive costs, because the cost of mining and crushing the ore has been paid for by the gold previously extracted. Most South African uranium is produced in this way. 

P100715S S. Petersen, H. Striegler, H. Gold, and A. Haberkorn, South African... 

White South African miners who had spent at least 85% of their working life in gold mines... 

Cluver E.H. 1932. An analysis of ninety-two fatal heat stress cases on Witwatersrand gold mines. South African Medical Journal, 615—23. 

In stark contrast, however, the mechanical portion of a mine winder often seems to have an almost unlimited life when considering the major components in general. A classic example of this was a winder which remained in service in its original location and largely in its original state, on a South African gold mine for some 96 years before the mine was finally closed and the winder was cut up for scrap (See Figure 1.)... 

One of the resin poisons of considerable importance in the South African uranium plants is the very stable cobalti-cyanide complex, or series of complexes, which form as a result of leaching the ore with cyanide solutions. These are used for the extraction of gold before the final leach with sulphuric acid for uranium extraction. The cobalti-cyanide complex can sometimes be removed from the resin by treatment with 2M potassium thiocyanate solution. This is expensive and not always satisfactory under plant conditions since it is beheved that several different compounds are responsible, some of them polymeric complexes and some are retained by the resin to a greater extent than others. The most satisfactory procedure is to prevent the absorption of cobalti-cyanide by removing it from the ore. This is accomplished by means of a water wash of the ore between cyanida-tion and sulphuric add leaching. However, cobalt poisoning remains a problem at some of the South African refineries, particularly that at West Rand. The resin is in fact usually replaced when its cobalt content reaches 2-5 per cent. ... 

FIGURE 5.6 Effect of temperature of water on the elution of gold. (From Davidson, R.J., J. South African Inst. Min. MetalL, 75, 67, 1974. With permission.)... 

Mixed dust fibrotic nodules are stellate. Microscopically they are composed of a central zone of collagen with a periphery of linearly and radially arranged collagen admixed with dust laden macrophages. In a series of 13,296 deceased South African mine workers from gold, coal, asbestos and other mines, approximately 1 % showed lesions of the mixed dust pneumoconiosis type in their lungs, but there was no obvious relationship to the type of mine (Goldstein and Webster 1971). In 234 North Wales and 11 Vermont slate workers the pa-... 

Feather, A., Bouwer, W., O Connell, R., and Roux, J. 2002b. Commissioning of the new Harmony gold refinery. In Proceedings international solvent extraetion eonferenee, eds. K. C. Sole, P. M. Cole, J. S. Preston, and D. J. Robinson, vol. 2, 922-927. Johannesburg South African Institute of Mining and Metallurgy. 

---