ABSTRACTPotential–pH diagrams for a chalcopyrite–xanthate–H2O and chalcopyrite–NaCN–H2O systems at 298 K were constructed to predict depressing components in the flotation of depressed chalcopyrite in cyanidation tailings using xanthate as a collector.
Biohydrometallurgy: From the Single Cell to the Environment: Development of a Biotechnological Process for Reprocessing Flotation Tailings from Almalyk Mining and Metallurgical Complex, Rep. of Uzbekistan
suggested that chalcopyrite was depressed because of the chemical adsorption of cyanide on the chalcopyrite surfaces. Sodium hypochlorite, hydrogen per-oxide and sodium metabisulﬁte can destroy Cu-C bond on the deep-depressing chalcopyrite surface by chemical reaction. Copper sulfate can activate deep-depressing chalcopyrite by …
Request PDF on ResearchGate | Cooperative bioleaching of chalcopyrite and silver-bearing tailing by mixed moderately thermophilic culture: An emphasis on the chalcopyrite dissolution with XPS and electrochemical analysis | In this work, the interactions between one sample of silver-bearing tailing (223 g/t silver) and chalcopyrite …
(enargite + chalcopyrite) ﬂotation, 97% of enargite was ﬁrst removed at pH 4 followed by chalcopyrite ﬂotation at pH 8, and over 95% recovery was achieved in 15min ﬂotation time. The As content in the ﬁnal tailings was reduced to 0.1mass%.
Flotation Hydrophobic Chalcopyrite Tests. To determine the hydrophobic characteristics of chalcopyrite, a mixture of sized pure chalcopyrite and porphyry copper tailings sample B was floated. The chalcopyrite was sized into three fractions, 20 by 10 µm, 10 by 5 …
Flotation separation of chalcopyrite from talc using carboxymethyl chitosan as depressant 1259 The effect of carboxymethyl chitosan dosage on flotation of chalcopyrite and talc at pH 7 was studied and the results are shown in Fig. 4.
Waste rock particles do not adhere to the bubbles and drop to the bottom of the tank. The waste material that comes out of the bottom of the tanks at the tail end of this process is called "tailings." It is nothing more than ground-up rock with the copper minerals removed.
Jun 09, 2016· Flotation separation of such refractory chalcopyrite ore can be achieved by treating ores with conventional sulfide collectors and depressors, and treating ores in fine size fraction with kerosene and diesel oil, employed as collector either alone or in combination with each other. Therefore, the cost of flotation reagents is cut down greatly.
Flotation (historically spelled floatation) involves phenomena related to the relative . of buoyancy objects. Flotation process (flotation separation) is a method of separation widely used in the wastewater treatment and industries. mineral processing Schematic presentation of flotation method is presented in Fig. 1. Fig. 1.
By comparing the FTIR spectra of activated chalcopyrite by sodium hypochlorite, hydrogen peroxide and copper sulfate, respectively, with that of depressed chalcopyrite in Fig. 8, the adsorption peaks at ~2175 cm −1, ~2083 cm −1 and ~424 cm −1 disappeared, which indicates that sodium hypochlorite, hydrogen peroxide and sodium metabisulfite …
Selected Proceedings of the Eighth International Conference on Waste Management and Technology: Experimental Study on Comprehensive Recovery of Valuable Minerals from Flotation Tailings in Copper-Molybdenum Mine
sulfur flotation tests. The tailings from the sulfur flotation were subjected to halcopyrite c flotation to recover copper value. (a) Effect of collector. Sulfur is known for its hydrophobicity in nature. Discrete sulfur particles can be expected to possess excellent flotability with a small amount of flotation reagent.
Hence, the best estimate of the total copper content in the old flotation tailings of the Copper Mine Bor ranges between 54000 and 81000 t. Previous detailed analyses of the mineral and chemical composition of samples of the old flotation tailings5,6 showed that the copper content in the dump could reach 0.5 %.
Rougher flotation of the unleached ore recovered 79% of the copper to rougher concentrate and lost 21% of the copper to flotation tailings. Seven points of copper recovery were gained by leaching prior to flotation.
chalcopyrite flotation tailing - gatewaypreschool.org In this study, the differences between the separation of chalcopyrite and chalcocite from pyrite in cleaner flotation after regrinding were investigated.
containing groups at their polar end, such as xanthates, are used as collectors in the flotation process. Additionally, modifiers like hydroxyl ions (pH adjustment) are used to select different sulfide minerals, for example, chalcopyrite and pyrite. Alcohols are used to stabilize the froth.
selectively with depression of zinc and iron, followed by reflotation of the copper-lead tailing for recovery of zinc. The polymetallic separation flowsheet of copper/lead bulk flotation–copper lead separation–priority floating zinc and pyrite from the bulk flotation tailings was used based on the ore properties.
Copper tailings can serve as the source materials for the residual minerals, such as pyrite, chalcopyrite, chalocite . Besides, the discarding of copper tailings could bring severe environmental problems because the residual sulphide minerals may go though enormous oxidation to produce acid drainage .