Vibro assisted cementation of gold onto zinc granules

in Proceedings of the 14-th Mining Congress of Turkey (1995)

Cementation of gold aqueous complexes onto zinc granules instead of zinc dust was studied in a column subjected to vibrations. Two type of lab csale cementing reactors were tested and their efficiency ... [more ▼]

Cementation of gold aqueous complexes onto zinc granules instead of zinc dust was studied in a column subjected to vibrations. Two type of lab csale cementing reactors were tested and their efficiency compared a column and a bed-type one. The influence of foreign ions addition upon the degree of gold cementation was investigated as well. [less ▲]

Opportunities for fine gold recovery from a copper flotation circuit using Knelson concentrator

in Minerals Engineering (1994), 7(2/3), 405-408

Experiments aimed at determination of the character of the gold observed in a copper ore processed by flotation, and also to evaluate the possibilities of improvement of the total gold recovery have been ... [more ▼]

Experiments aimed at determination of the character of the gold observed in a copper ore processed by flotation, and also to evaluate the possibilities of improvement of the total gold recovery have been carried out. The gravity equipment used was a 7.5" Knelson screen hydrostatic concentrator, reported of being capable of treatment and upgrading of up to 1000 times raw material with about 30% hypothetical concentration of heavy flotation sized particles. The gold-to-sulfides ratio obtained during the various runs was chosen as a general criterion for the type of gold presented (free or locked) and for the gravity approach feasibility. [less ▲]

Perspectives for treatment of precious metals containing flotation wastes

in Rao, S.; Amaratunga, L. (Eds.) Waste Processing and Recycling in Mining and Metallurgical Industries (1992, August)

Four groups of precious metals containing mineral resources occuring in Bulgaria are described. The precious metals which they contain are often lost in the tailings during flotation since the exisitng ... [more ▼]

Four groups of precious metals containing mineral resources occuring in Bulgaria are described. The precious metals which they contain are often lost in the tailings during flotation since the exisitng schemes are targeting the recovery of non-ferrous metals mainly. Options for recovery of the thus remaining precious metals by cyanidation and thiourea leaching are discussed and preliminary results presented. [less ▲]

Advantages of natural brown coal application for sorption treatment and cleaning of pregnant solutions after thiourea leaching

in Chalkley, M.; Oliver, A. (Eds.) Proceedings of the International Symposium of Environmental Controls in Metallurgical Industries and Scrap Metal Recycling (1991, August)

The possibility for metals sorption on native brown coal has been tested using pregnant solutions obtained aftet thiourea leaching of flotation wastes. Two stage sorption flowsheet has been designed ... [more ▼]

The possibility for metals sorption on native brown coal has been tested using pregnant solutions obtained aftet thiourea leaching of flotation wastes. Two stage sorption flowsheet has been designed. Precious metals could be recovered from the loaded sorbents by burning them. Sorbent amount, sorption capacity and contact time have been investigated in terms of influence on process feasibility. [less ▲]