· In the flotation experiments, better results were obtained in terms of chalcopyrite grade at a low airflow rate and a high froth height. With increasing froth …

Seawater has been increasingly used as an alternative to freshwater in mineral flotation. Although previous studies suggest that Mg2+ ions in seawater have the primary negative roles in chalcopyrite flotation, insufficient work has been conducted to understand the effects of kerosene as a collector in chalcopyrite flotation. In this study, the influence of kerosene …

 · The paper investigated the effect of CuSO4 on the depressant performance of sodium thioglycolate towards chalcopyrite through flotation tests, Zeta potential measurements, X-ray photoelectron ...

 · Sea water has been used in flotation plants, showing a promising way to save fresh water usage. Previous studies indicated that divalent salts in sea water played negative roles in chalcopyrite flotation, but not much work have been conducted to understand the eliminating mechanisms. This study systematically investigated the …

 · At pH = 9, the lower limit of potential for the collectorless flotation of chalcopyrite is determined by equation (3): CuFeS2 + 3H2O = …

 · Flotation of Chalcopyrite (CuFeS 2) Complete flotation of chalcopyrite is possible from pH 3 to pH 12 with ethyl xanthate. Both electrochemical oxidation of xanthate to dixanthogen as well as chemisorption of xanthate on chalcopyrite are responsible for flotation when xanthate is added as collector. Depression of chalcopyrite 1. Hydroxyl as ...

 · The full priority flotation process is suitable for ores with simple composition, few useful minerals to be recovered, large differences in flotation between useful minerals, or …

 · Hetero-difunctional Reagent with Superior Flotation Performance to Chalcopyrite and the Associated Surface Interaction Mechanism Langmuir. 2019 Mar 26;35 (12):4353-4363. doi: 10.1021/acs.langmuir.9b00156. Epub 2019 Mar 12. Authors Sheng Liu 1 2, Lei Xie 2, Guangyi Liu 1, Hong Zhong 1, Yixiang Wang 3, Hongbo Zeng 2 Affiliations

The recoveries of chalcopyrite and magnesium silicate minerals as a function of the pH obtained using single-mineral flotation tests were shown in Fig. 6. The recoveries of chalcopyrite, serpentine and talc were 79%, 10% and 60%, respectively, when the pH was controlled at the vicinity of 9.2 with 80 mg/L PBX and 24.7 mg/L PAAS.

 · Copper 3.78%. Sulphur 42.38%. Zinc 12.45%. Gold 0.01 oz/ton. Iron 32.84%. Silver 1.50 oz/ton. Insoluble 8.50%. In order to meet smelter requirements it is desired to produce at least a 20% copper concentrate with not over 8% zinc. The copper is present principally as chalcopyrite in extremely close association with both the sphalerite and pyrite.

 · Flotation of chalcopyrite As shown in Fig. 2, about 91% chalcopyrite recovery in 8 min of flotation was achieved in the rougher stage. The rougher flotation concentrate was …

 · The most significant factor increasing pyrite recovery was the amount of clay. Although illite is considered to be the least problematic clay mineral for flotation, as …

 · In the flotation experiments, better results were obtained in terms of chalcopyrite grade at a low airflow rate and a high froth height. With increasing froth height there was a decline in the gangue mineral recovery as the residence time of the froth increased. The most significant factor increasing pyrite recovery was the amount of clay.

The flotation of chalcopyrite and talc remained above 90% (pH = 2–12), but adding xanthan gum, the chalcopyrite depressed in acid conditions, recovering 10% at pH = 2. This effect …

 · improved the flotation of cyanide chalcopyrite, and the flotation recovery was increased to 92.28% and 84.35%, respectively. The micro-thermodynamics results indicated that the adsorption heat of butyl xanthate on cyanide chalcopyrite surface increased after the addition of CuSO 4 and H 2 O 2, as well as the reaction order. CuSO 4 and H 2 O 2

 · The flotation results indicate that micas depress chalcopyrite and molybdenite, and that the use of dispersants SHMP and SS restore the flotation of these metal sulfides. Table 3 shows the effect of SHMP and SS on the zeta potential of chalcopyrite in aqueous solutions of magnesium and calcium, at pH 9 and 11.

： The flotabilities of chalcopyrite and galena with sodium humate (HA) and ammonium persulfate (APS) as the depressant were studied by flotation test, adsorption measurement and infrared spectroscopic analysis.

In industry, chalcopyrite is usually concentrated by a flotation process, which is a water-intensive process consuming vast amounts of freshwater. However, freshwater is limited due to the increasing scarcity of freshwater resources and stringent environmental regulations [ …

 · The recoveries of chalcopyrite and magnesium silicate minerals as a function of the pH obtained using single-mineral flotation tests were shown in Fig. 6. The recoveries …

 · mechanisms are suggested for the selectivity of chalcopyrite/marmatite by mbt: the hydrophilic hydroxides (zn(oh)2and fe(oh)3) are formed on the marmatite surface, which renders the marmatite surface hydrophilic and hampers the reaction between mbt and marmatite-activated products, while the hydrophobic compounds (mbt)2and …

Separation effects of sodium polyacrylate (PAAS) and gum Arabic (GA) on flotation of chalcopyrite and magnesium silicate minerals using potassium butyl xanthate (PBX) as collector were investigated by micro-flotation experiments, zeta potential, Infrared spectral (IR), SEM–EDS, XPS analysis and copper sulphide ore beneficiation test.

the closed-circuit flotation test of copper/lead bulk concentrate shows that the grade and recovery of cu reach 30.47% and 89.16% respectively and those of pb reach 2.06% and1.58% respectively in copper concentrate, and the grade and recovery of pb reach 50.34% and 98.42% and those of cu reach 1.45% and 10.84% respectively in lead …

 · It was observed that the flotation of chalcopyrite is not depressed completely when the pulp potential is low, even at high concentrations of sodium sulfide, i.e., 10 −1 –10 −2 mol/L. However, a partial and controlled oxidation of pulp does enhance the effectiveness of sodium sulfide on the depression of chalcopyrite.

 · Chalcopyrite is a widely distributed copper-iron sulfide mineral, often containing trace amounts of gold, silver and other minerals, and is the main copper-containing mineral. With the deepening of mining, low grade polymetallic refractory chalcopyrite has become an important source of copper ore. Now, let's know the common chalcopyrite flotation …

 · The chalcopyrite sample used in all the experiments was obtained from Chitradurga Copper Mines (Karnataka, India). It was subjected to a series of concentration procedures such as froth flotation, heavy media separation and isodynamic separation and only the -72+100 BSSmesh portion from dry screening was selected.

 · in the flotation of chalcopyrite and molybdenite, these two minerals are generally floated together into the cu/mo concentrate in the presence of diesel or selective ester collectors due to their relatively good natural floatability [4], and then to separate from each other with the help of na 2 s/nahs [5], [6], cyanide [7], nokes' reagents [8] …

 · The influence factors lie in the grinding condition, pH value of flotation and the pulp potential. On conditions of grinding with ceramic ball mill and pH = 9, the lower limit of pulp potential was 50-100 mV and the …

 · Hetero-difunctional Reagent with Superior Flotation Performance to Chalcopyrite and the Associated Surface Interaction Mechanism Langmuir. 2019 Mar 26;35 (12):4353 …

 · Furthermore, the addition of diesel oil or kerosene could significantly improve the separation efficiency of selective flotation of chalcopyrite and molybdenite using MBS treatment. A mechanism based on X-ray photoelectron spectroscopy analysis results is proposed in this study to explain the selective depressing effect of MBS on the flotation ...

 · The flotation experiment results showed that at pH 3–8, TG had a significant selective depressive effect on chalcopyrite flotation and it was enhanced with increasing TG concentration, but ...

 · A fundamental study was conducted at the Tuscaloosa Research Center, U.S. Bureau of Mines to (1) determine if ultrafine chalcopyrite is floatable (hydrophobic), (2) establish the physical and chemical …

 · ATT with analytical grade and chalcopyrite particles with size of -74 + 38 μm were directly used to measure their FTIR spectra. For treated chalcopyrite with ATT, 0.5 g chalcopyrite particles for micro-flotation tests were put into a 100 mL beaker, after that, 30 mL ATT solutions with a concentration of 3.0 mg/L and pulp pH 9.0 were added.