The invention provides a kind of flotation-acidleach process integration processing low-grade mixed copper ore.Flotation process comprises three steps first select new and effective collecting agent MA as Copper sulfide ore collector direct flotation copper-sulphide ores cupric oxide ore is reclaimed again respectively by sulfide flotation and direct flotation select new and effective
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· Copper recoveries obtained in laboratory batch flotation tests from hydrocyclone overflow and un-derflow are 90.77 and 7.94 respectively. Calculated in relation to total copper in the feed of hydrocyclone 17.30 Cu can be valorized from hydrocyclone overflow by flotation process with the
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· tion of copper. In a stage of flotation with recirculation recoveries of 58 and 66 were obtained with the flat and the cylindrical spargers respectively. The dispersion parameters and bubble surface area flux (S b) show a good relation with the apparent flotation rate constant (k)
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· Copper recoveries obtained in laboratory batch flotation tests from hydrocyclone overflow and un-derflow are 90.77 and 7.94 respectively. Calculated in relation to total copper in the feed of hydrocyclone 17.30 Cu can be valorized from hydrocyclone overflow by flotation process with the
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· Figure 1Schematic flow sheet of the batch flotation tests Table I Conditions for the bench-scale flotation and micro-flotation tests Experimental conditions Constants Cell type XF-D Cell volume 1.5 L 0.5 L Solid feed mass 0.5 kg Impeller speed 800 rpm Air flow-rate 4 L/min Ore Yunnan mine Feed size 90 passing 37µm
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· In this study the effects of these parameters on the C a were investigated in column flotation using copper sulfide ore. It was found that when the feed solid rate increased the concentrate solid rate increased to a certain point whereafter it started to decrease. When the air flow rate increased the C a first increased then drastically
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· Figure 1Schematic flow sheet of the batch flotation tests Table I Conditions for the bench-scale flotation and micro-flotation tests Experimental conditions Constants Cell type XF-D Cell volume 1.5 L 0.5 L Solid feed mass 0.5 kg Impeller speed 800 rpm Air flow-rate 4 L/min Ore Yunnan mine Feed size 90 passing 37µm
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· equation (Eq.7) for the first order flotation kinetics. The modified rate equation is =1.(1—e 4 -4")) (8) The changes in flotation variables such as air flow rate and collector dosage change the numerical values of and/or k. The effect of the variable on flotation is interpreted from the trend in the change of these parameters.
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· 1 Froth Flotation Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air bubbles are then carried to the surface and
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· Dewatering of Copper Flotation Tailings Effect of Feed Dilution on the Thickener Performance The results indicated that reducing eductor discharge solid loading increased thickener underflow solid loading. Higher thickener feed flow rate also affected eductor performance reducing its discharge solid loading by 4 wt. . Finally a smart
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· The results show that the gas hold-up rises with the gas flowrate and slurry feed rate whereas it decreases with solid concentration for both hydrophilic and hydrophobic solid particles. In oxidized coal particle experiments the gas hold-up varies to 34.7 at 0.6 cm/s gas flowrate for a change in the solids of 5–15 whereas it increases to 38.93 at 1.8 cm/s.
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In mineral flotation rheological problems have limited the efficient upgrading of low-grade and complex ores. Since pulp and froth rheology are deemed to play different roles in influencing the separation performance in this paper a brief review on pulp and froth rheology in flotation is provided with an objective of developing a basic understanding of rheology in flotation.
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· The development of flotation column is the most significant achievement in the area of mineral processing in Key words Flotation column axial mixing counter current flow superficial flow rate baffle entrainment in . fines sulphide minerals limestone magnesite chromite and sillimanite. The flow sheet for beneficiation
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· produced by flotation (International Copper Study Group 2012). In 2011 about 60 percent of primary copper produced in the United States originated from flotation (Daniel E. Edelstein Copper Commodity Specialist U.S. Geological Survey written commun. March 20 2012).
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· the individual flotation cell s solution. Copper flotation instrumentation solutions The InPro 4260i or 4501 series solid polymer pH electrodes are especially recommended for control in the pH 12.5 range that is characteristic of flotation cell lime slurries. These electrodes fea-ture the Xerolyt® solid polymer reference system which
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· In this study the effects of these parameters on the C a were investigated in column flotation using copper sulfide ore. It was found that when the feed solid rate increased the concentrate solid rate increased to a certain point whereafter it started to decrease. When the air flow rate increased the C a first increased then drastically
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The flotation rate con- Copper ore Flotation stant decreased with increasing the solids content while ultimate recovery increased to certain value Kinetics model and thereafter reduced. . the effect of factors such as chemical factors (pH solid content water chemistry and reagent type) air flow rate and impeller 3. Results and
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· Froth Flotation process flow back to top. The froth flotation process mainly includes grinding slurry adding froth flotation separation and dehydration of foam products and tailing products after froth flotation. Before the flotation operation the ore needs to be ground to an optional size range by the grinding mill generally less than 0.1 mm.
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· flotation rate particle size recovery air flow pulp density etc.) As a result it is difficult to Table 1 Grade/recovery performance of a hypothetical copper ore flotation process. Product Weight Cu Assay Feed 100 2.09 solid/vapor interface
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· The flotation tests were carried out in a Hallimond tube and Denver type flotation machine. In Hallimond tube tests 1 g sample was used having –210 38 µm. In the study of the oeffect of particle size different sizes were used. Air flow rate of 6 ml/min was maintained. In all tests potassium amyl xanthate (2x10-5 M KAX) and methyl
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· N 2 at an average flow rate of 25 cm 3 for 20 seconds. The final pH was measured to ensure that no appreciable change had occurred during flotation. 6.4. Results and Discussion 6.4.a. Effect of pH on the activation kinetics Figure 6-2 shows the copper uptake by
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· Froth Flotation process flow back to top. The froth flotation process mainly includes grinding slurry adding froth flotation separation and dehydration of foam products and tailing products after froth flotation. Before the flotation operation the ore needs to be ground to an optional size range by the grinding mill generally less than 0.1 mm.
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· Flotation rate evaluation was carried out by the short-cut method (Yianatos and Henríquez 2006) using a Gamma distribution for describing F(k). Table 6 shows the results of the mass balance adjustments where the measured grade data were corrected to satisfy the overall and component mass balance. It was observed that recovery of the first cell of line B was higher than recovery of the first
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· Influence of frother type and dose on collectorless flotation of copper-bearing shale 549 minutes and after this time only the aqueous solution of frother was pumped to the column. In each flotation tests the feed and aqueous solution flow rates were controlled 3by a peristaltic pump. The feed flow rate was 18 dm /h and the aqueous
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· Solid Flow Rate t/h 5 765 Mass Balance Solid Flow Rate (Each Line) t/h 1441 Mass Balance Pulp Flow Rate m3/h 11 876 Mass Balance Pulp Flow Rate (Each Line) 2 969 Mass Balance Batch Retention Time min 7.0 Testwork Reports Scale-up Factor 2.1 Engineering Design Plant Retention Time min 14.7 Calculations Pulp pH 10.0 Engineering Design/Reports
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This paper discusses the methods used in the design of flotation plants including benchscale batch and locked cycle tests and pilot plant trials. Two case studies are presented one for the Cadia Hill Gold Mine and the other for the Hellyer copper zinc and lead plant. These case
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· the individual flotation cell s solution. Copper flotation instrumentation solutions The InPro 4260i or 4501 series solid polymer pH electrodes are especially recommended for control in the pH 12.5 range that is characteristic of flotation cell lime slurries. These electrodes fea-ture the Xerolyt® solid polymer reference system which
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The air-solids ratio A/S is typically calculated with the following equation Where sa is the air solubility f is an efficiency factor P is the recycle pressure R is the recycle flow rate Sa is the influent suspended solids concentration and Q is the influent flow rate. The required DAF area can be calculated based on a design value for
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· tion of copper. In a stage of flotation with recirculation recoveries of 58 and 66 were obtained with the flat and the cylindrical spargers respectively. The dispersion parameters and bubble surface area flux (S b) show a good relation with the apparent flotation rate constant (k)
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· A high rate constant indicates that certain species floats quickly while a low rate constant indicates slow flotation. Knowing the rate constants of two (or more) species within a separation process reveals the efficiency of the process. The greater the difference between the two rate constants the better the separation is. The recoveries of each
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· The flotation of native copper ores is nearly always preceded by gravity concentration in jigs and tables not only because the combined process is more economical as regards costs but also because the copper often occurs as large grains which flatten out during grinding and cannot be broken to a size small enough for flotation. The flow
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· N 2 at an average flow rate of 25 cm 3 for 20 seconds. The final pH was measured to ensure that no appreciable change had occurred during flotation. 6.4. Results and Discussion 6.4.a. Effect of pH on the activation kinetics Figure 6-2 shows the copper uptake by
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· solid concentration flow rate and recycle rate is given by the following equation Coagulation and flocculation are the mechanisms by which the suspended particles and colloidal materials are removed fromthewater during the flotation process. Optimization of coagulation and flocculation is necessary for optimum performance of flotation system.
Chat Online· A high rate constant indicates that certain species floats quickly while a low rate constant indicates slow flotation. Knowing the rate constants of two (or more) species within a separation process reveals the efficiency of the process. The greater the difference between the two rate constants the better the separation is. The recoveries of each
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· The development of flotation column is the most significant achievement in the area of mineral processing in Key words Flotation column axial mixing counter current flow superficial flow rate baffle entrainment in . fines sulphide minerals limestone magnesite chromite and sillimanite. The flow sheet for beneficiation
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The flotation rate con- Copper ore Flotation stant decreased with increasing the solids content while ultimate recovery increased to certain value Kinetics model and thereafter reduced. . the effect of factors such as chemical factors (pH solid content water chemistry and reagent type) air flow rate and impeller 3. Results and
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· produced by flotation (International Copper Study Group 2012). In 2011 about 60 percent of primary copper produced in the United States originated from flotation (Daniel E. Edelstein Copper Commodity Specialist U.S. Geological Survey written commun. March 20 2012).
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· The above flowsheet is designed for the treatment by flotation of copper as chalcopyrite with gold and silver values. The ore ranging from 60-65 silica with pyrite arsenopyrite and calcite with 3 to 4
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· flotation rate particle size recovery air flow pulp density etc.) As a result it is difficult to Table 1 Grade/recovery performance of a hypothetical copper ore flotation process. Product Weight Cu Assay Feed 100 2.09 solid/vapor interface
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· equation (Eq.7) for the first order flotation kinetics. The modified rate equation is =1.(1—e 4 -4")) (8) The changes in flotation variables such as air flow rate and collector dosage change the numerical values of and/or k. The effect of the variable on flotation is interpreted from the trend in the change of these parameters.
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· grades and their recoveries of flotation concentrate based on operational parameters of the industrial flotation process. In this work operational parameters were pH collector frother and F-Oil concentration size percentage of feed passing 75 microns moisture content in the feed solid percentage and grade of copper molybdenum and
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