Chalcopyrite is an important ore to obtain copper where in Brazil we have several mines located all regions. The process of separation known as flotation efficient that allows the use bubbles and a foaming material with help collectors are able conduct chalcopyrite well other ores for through appropriate equipment. Currently this used PH modifiers allow pneumatic method. Chitosan biotechnologic...

First-principles total-energy calculations reveal a novel local atomic reconstruction mode around anion vacancies in II-VI and chalcopyrite compounds resulting from the formation of metal dimers. As a consequence, the neutral Se vacancy has an unexpected low symmetry in ZnSe and becomes a deep donor in both ZnSe and CuGaSe2, contrary to the common belief regarding chalcopyrites. The calculated ...

The interface formation between epitaxial CuInSe2(112) films and ZnO deposited by metal-organic MBE is investigated by photoelectron spectroscopy. Reaction of diethyl-zinc with CuInSe2 leads to the formation of an intrinsic ZnSe layer and copper-depletion of the interface. This is associated with Zn doping of the chalcopyrite surface and a Fermi level shift towards the conduction band. The impl...

A typical South Crofty ore containing minor amounts of arsenopyrite and chalcopyrite (ore A) gives 65% overall recovery of cassiterite in the spiral circuit, overall enrichment ratios being about 25-35. Maximum recovery occurs in the size range 53-110 /Lm(Fig. 2). However, recently treated ore types (ore B) have been much richer in sulphides, yielding up to 30°" As in the recleaner table concen...

qaleh-zari is a fe-oxide cu-ag-au vein type deposit located 180 km south of birjand, in eastern iran. host rocks are mainly tertiary calc-alkaline to k-rich calc-alkaline with transition to shoshonitic andesite and andesitic basalts, but in the central part shale and sandstone of jurassic age. andesitic rocks from the western region of qaleh-zari were dated to 40.5 ± 2 ma. four trends of faults...

Abstract The ca. 1,500 to 1,325 Ma Mesoproterozoic Belt-Purcell Basin is an exceptionally preserved archive of Earth and its paleoenvironmental conditions. also host world-class base metal sediment-hosted mineralization produced in a variety settings from the rift stage basin evolution through subsequent influence East Kootenay Grenvillian orogenies. mineral potential this has not been fully re...

Abstract The ca. 1,500 to 1,325 Ma Mesoproterozoic Belt-Purcell Basin is an exceptionally preserved archive of Earth and its paleoenvironmental conditions. also host world-class base metal sediment-hosted mineralization produced in a variety settings from the rift stage basin evolution through subsequent influence East Kootenay Grenvillian orogenies. mineral potential this has not been fully re...

In order to extract copper metal from the waste dump of Dexing copper mine and resolve the environmental problems caused by acidic water and heavy metals, a dump bioleaching plant was designed based on a series of experimental investigations. The investigation shown that the low-grade of the dump, refractoriness of chalcopyrite, leakage of pad, small Acidithiobacillus population and low dump pe...