·The procedure followed for flotation tests is a standard optimised method at Boliden laboratory in the treatment of complex sulphide ores For each flotation test 1 kg of ore of − 3 mm is wet ground with l of water for 20 min
·Desliming preceding flotation is an industrial practice established over 60 years ago introduced in the USBM process for the iron ores cationic reverse flotation Clemmer 1947 A high dispersion degree of the particles in the pulp is essential for effective desliming a requisite for the selectivity in most non sulphide flotation systems
·There have been only a few studies on the effects of sulphate addition on the flotation of sulphide ores For example sulphate addition 63 mg/L to a complex sulphide ore showed mixed results on the flotation of the major minerals Pb recovery increased but Zn recovery decreased while Cu recovery slightly decreased
·sulphide ore flotation practices in brief and processes adopted in HZL s plants It also highlights R&D efforts made and new technologies adopted in one of the most complex sulphide ore beneficiation plants to solve metallurgical problems in flotation process Key Words Froth flotation Sulphide flotation Control system Flotation
A Sulfide Ore refers to ores containing minerals like chalcopyrite sphalerite and galena which are difficult to separate selectively due to their fine grained and complex composition These ores require specific collectors such as xanthates or chelating reagents for effective recovery Flotation of sulphide concentrate as described
·The sulfide ore flotation process can be studied by both chemical and electrochemical phenomena considering the interfacial energies A broad application of this process in industrial field is the
·According to the electrochemical theory of flotation in sulfide ore flotation system anode reaction is that the collector xanthate reacts with sulfide ore minerals to form the metallic salt collector or dimer of collector dixanthogen while the cathode reaction is that the oxygen in the pulp is reduced by receiving the electrons given by the anode reaction
·With the continuous development of mineral resources to high altitude areas the study of sulfide ore flotation in unconventional systems has been emphasized There is a consensus that moderate oxidation of sulfide ore is beneficial to flotation but the specific suitable dissolved oxygen value is inconclusive and there are few studies on sulfide ore flotation under
·xanthate are involved in chalcopyrite flotation it would be expected that chalcopyrite is as sensitive to cyanide additions as pyrite is 3 Sulphide as depressant Very stable cupric sulphide CuS will occur due to chemisorption of sulphide ions Oxidation potential of the solution will be lowered when sulphide ion is added
·In fact in sulfide ore flotation concentrates silica is usually the most common impurity Accordingly increasing the concentration makes it difficult to reduce the content of silica in the concentrate indicating that in addition to quartz entrained by foam and useful minerals in the form of symbiosis in the concentrate the sulfide mineral
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