会议专题

Complex-forming Reactants for Effective Flotation of Pt-Cu-Ni and Au-sulfide Ores of Russia

In Pt- and Au-keeping complex ores processing, about 10%~15% of noble metals are lost with true tailings that are due to low floatability of Pt- and Au-keeping minerals by the conventional collectors. With the aim to achieve the effective recovery of noble metals at flotation of Pt-Cu-Ni and Au-keeping ores organic complex reagents keeping electron-donating atoms of nitrogen, oxygen,sulfur or phosphorus may be offered as selective collectors for the indicated minerals. These reagents tend to form complex compounds with PGM. Besides this, Cu-Ni-Pt and complex Pt and Au carbonated mica ores are characterized by finely disseminated (up to nanometer size) mineral forms of Pt in multivalent states. In this connection, the use of a combination of the strong ionic collectors with nonionic reactants that are capable to derivate complex compounds with multivalent PGM seems to be expedient for this type of ores.In the research new complex reactants were tested such as cyclic alkylene-trithiocarbonates,oxyalkyl butylxanthogen acid ethers, a combination of the collectors mercaptobenzothiazole (MBT) and dialkyldithiophosphates (DTP). Sorption and flotation tests were made with monomineralic samples of chalcopyrite, pentlandite, pyrrhotite, pyrite, and Pt-Cu-Ni sulfide ore samples.Sorption properties were examined by the extractive UV spectrophotometric method and potentiometric measurements.To indicate a structure of modified xanthate solutions the method of a thin-layer chromatography (TLC) was applied. The chromatographic behavior of the basic components of modified xanthate solution ButX, cyclic propylene-trithiocarbonate (PTTC), diethyi-dithiocarbamate (DEDC) and the product of its modification oxypropyl-S-ether of dithiocarbamatic acid was studied on plates Silufol UV- 254. The composition of organic solvents and its ratio in a mobile phase was determined for simultaneous chromatography of the main components of a reaction mixture.It was found that operating selectivity of MBT, DTP and cyclic alkylene-trithiocarbonates incorporated in modified xanthate in relation to Pt-Cu-Ni and Au-containing sulfide minerals might be explained by an electoral sorption of this nonionic collector on a surface of the minerals studied. It was demonstrated that the application new reagent modes with the use of a combination of designed complex reactants helped to increase the extraction index of Pt- and Au-keeping minerals from complicated ores.

Complex-forming reactants Cyclic propylene-trithiocarbonate Oxypropyl-S-ether Sorption Flotation Pt-Cu-Ni and Au-keeping minerals

V. A. Chanturiya T. N. Matveyeva T. A. Ivanova N. K. Gromova

Institute of Complex Exploitation of Mineral Resources (IPKON), Russian Academy of Sciences, Moscow, Russia

国际会议

XXIV International Mineral Processing Congress(第24届国际矿物加工大会)

北京

英文

1615-1621

2008-09-24(万方平台首次上网日期,不代表论文的发表时间)