Effect of Ammonium Sulfide on Sulfidization …
Recently, several studies have shown the positive effect of sulfidization flotation on malachite surfaces and its enhancing methods. Therefore, this paper was focused on the effect of ammonium sulfide …
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Evolution of sulfur species on malachite surfaces in the …
Because Ca 2+ and Mg 2+ are often present during malachite flotation, we sought to thoroughly investigate the influences of these ions on the process and products of malachite sulfidization. ... In a typical experiment, 2 g of the powder sample and an appropriate amount of DI water were placed in a 40 mL flotation cell. The flotation …
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Ammonia modification for enhancing adsorption of …
The flotation behavior of the ammonia-modified and bare malachite as a function of Na 2 S concentration was evaluated, and the result is shown in Fig. 1.When low-concentration NaAX served as the collector, the flotation recovery of malachite significantly differed between the ammonia-modified and bare malachite surfaces prior …
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A novel method for improving sulfidization xanthate flotation …
This test was performed using the XFG–II flotation machine at an available cell of 40 mL and the rotation speed of 1600 r/min was used in the malachite flotation test. Before the experiment, a malachite sample (2 g) was placed in a flotation tank, and 35 mL of ultrapure water was added for slurry mixing.
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Adsorption of cupferron on malachite (−2 0 1) surface and …
Microflotation experiments were conducted in an XFG laboratory flotation cell (Jilin Exploration Machinery Plant, China) with a volume capacity of 40 mL and a stirring speed of 1992 rpm. First, 40 mL of deionized water and 2.0 g of malachite samples were placed in the flotation cell. Then, the cupferron was added after stirring the pulp.
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Sulfidization mechanism in malachite flotation: A …
Sulfidization followed by xanthate flotation is an effective technique to recover copper oxide minerals.However, the sulfidization mechanism of malachite has not been determined. In this work, the sulfidization mechanism was investigated by …
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N1,N10-dihydroxydecanediamide: Its separation
Commonly, xanthate used as collector in malachite flotation must be combined with sulfurizing reagent (Na 2 S, NaHS or (NH 4) 2 S), ... the cut-off energy of primitive cells and surfaces were set to 570 eV and 440 eV, respectively. The k-points sampling of primitive cells and surfaces were set to 2 × 2 × 6 and 2 × 3 × 1, respectively. ...
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A New Collector for Effectively Increasing Recovery in Copper …
A new method, staged flotation for effectively increasing the recovery of ultra-fine copper oxide ore with a new type of collector (ZH-1, C3-5 carbon chain xanthate) is proposed for the first time. The flotation process and mechanism were examined by flotation tests, entrainment rate analysis, laser particle size experiments and …
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Adsorption behavior and mechanism of copper ions in the …
Microflotation tests were performed using an XFGII flotation machine with a microflotation cell (40 mL). The speed of the flotation machine was set to 1640 r/min. The particle size range of the malachite test minerals was 37–74 µm. ... Malachite flotation recovery as a function of xanthate concentrations in the absence and presence of Cu 2 ...
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The Denver cell flotation tests. | Download Table
Download Table | The Denver cell flotation tests. from publication: Effect of bacterial conditioning and the flotation of copper ore and concentrate | In this paper, the effect of bacterial ...
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High-turbulence fine particle flotation cell optimization …
High-turbulence fine particle flotation cell optimization and verification QianDe Xu1,2, Wentao Hu1,2,3 & Ming Zhang2,4 Microfine mineral particles have a small size, light weight, and low inertia ...
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Selective modification of malachite with ammonium …
The malachite and calcite surfaces treated with CH 6 N 2 O 2 and Na 2 S·9H 2 O featured a flotation recovery rates of 82.51% and ∼ 20%, respectively, and achieved a satisfactory selective flotation separation of malachite from calcite. CH 6 N 2 O 2 could promote the formation of Cu-S on the malachite surface. A large number of Cu-S on the …
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Malachite unit cell of the optimized structural …
Download scientific diagram | Malachite unit cell of the optimized structural model: (a) top view; (b) lateral view. from publication: Flotation Behavior and Synergistic Mechanism of ...
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Interface adsorption mechanism of 5-nonyl
These findings are of great help in promoting malachite flotation and its effective flotation separation from gangue minerals. ... The micro-flotation test was carried out by using an XFGC flotation machine with a fixed speed of 1758 r/min and a flotation cell volume of 30 mL. Before conducting the test, 2.0 g of malachite or quartz (calcite ...
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Enhanced sulfidation xanthate flotation of …
With NaBX as the collector, malachite floatability was weak without sulfidation prior to flotation, and the flotation recoveries of malachite were 20.42% at 2 × 10 −5 mol/L concentration of ...
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Bench-scale flotation of chrysocolla with n …
The same bench-scale flotation cell has been used previously to investigate hydroxamate flotation of blended copper ores of malachite and sulfides from Minto (Lee et al., 2009). In this paper we report the results obtained from bench-scale flotation testing of a chrysocolla–sand mixture as a function of copper content, pH, collector and ...
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A new perspective on copper oxide flotation: Synthesis and …
Micro-flotation tests were employed to explore flotation performance of malachite with BEHA under various pH values and were carried out by XFG flotation machine (flotation cell of 40 mL) at a rotating speed of 1300r/min. In each micro-flotation test, 2.00 g samples of malachite were added into flotation cell of 38.00 mL deionized …
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Influence of Bacterial Detachment on the Bioflotation of Malachite
The effects of the bacterial growth phase on the malachite flotation were investigated in a well-controlled Hallimond tube system. Rhodococcus opacus, which is one of representative hydrophobic ...
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Influence of ferrous ions on surface properties of malachite …
Micro-flotation studies. Malachite sulfidization flotation was tested with an XFGII microflotation facility with a 40-mL microflotation cell. In the single-mineral flotation test, the malachite sample and deionised water were placed in the cell and stirred for 1 min. The samples were sulfidized using sodium sulfide (Na 2 S·9H 2 O).
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Copper sulfide species formed on malachite surfaces in relation to
The flotation experiment was conducted at room temperature in a small-scale flotation machine, and 2.0 g of pure malachite samples were added into a 40 mL flotation cell. A fresh Na 2 S·9H 2 O stock solution …
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Flotation separation mechanism of malachite from calcite …
As shown in Fig. 2 a, the flotation recovery of malachite was first increased and then decreased with the improvement of slurry pH value. When the slurry pH was ∼ 9.3, the flotation recovery of malachite reached the maximum value of 31.25 %. The flotation recovery of calcite had little relationship with the change in pH value, which …
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Effect of Ammonium Sulfide on Sulfidization Flotation of Malachite …
Recently, several studies have shown the positive effect of sulfidization flotation on malachite surfaces and its enhancing methods. Therefore, this paper was focused on the effect of ammonium sulfide and sodium sulfide on the sulfidization of malachite, respectively; this was investigated using different devices such as the micro …
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The flotation of chrysocolla by mercaptan
No flotation occurred with the addition!of 7 mg 1-1 (6 10-s mol 1-1) of mercaptan but after a total of 25 mg1-1 (2.1 TABLEI ['-D Flotation tests on chrysocolla and synthetic chrysocolla ore in a laboratory flotation cell Charge Flotation steps Results 2 g 65 150 mesh chrysocolla 2 g 35 48 mesh chrysocolla and 100 g 48 65 mesh quartz.
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Effects of copper ions on malachite sulfidization flotation
The flotation of a single mineral was carried out using an XFGCII laboratory flotation cell (Jilin Exploration Machinery Plant, China) with a volume capacity of 40 cm3 at a spindle speed of 1992 rpm. For each flotation test, 2 g of malachite sample was first placed into the flotation cell. HCl and NaOH
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Flotation performance and adsorption mechanism of malachite …
In this research, the flotation performance and adsorption mechanism of tert-butylsalicylaldoxime (TBSA) to malachite were studied by micro-flotation, contact angle, zeta potential, FTIR and XPS analysis.The result of micro-flotation tests indicated TBSA yielded high malachite recovery and satisfied selectivity against calcite or silica at …
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Effective flotation separation of malachite from quartz with …
An XFG-type flotation equipment with a 30-mL flotation cell was employed to explore flotation performances of malachite and quartz with or without SDA under various pH values. In each typical experiment, in a flotation cell, the pulp was prepared via adding single mineral of 2.0 g or binary minerals of 1 g quartz and 1 g malachite to 25 …
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Efficiently separating malachite from talc using new collector
In single mineral flotation test, 40 mL of deionized water and 2.0 g of malachite or talc samples were placed in the flotation cell. Then, NaOH or HCl solution was used to adjust the pH to an expected value, after which the desired amount of famciclovir was added and allowed to react for 3 min, and then 2# oil was added and …
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Effects of common ions on adsorption and flotation of malachite …
The natural malachite sample used in the study was obtained from Lupe mine, Puebla, Mexico. The sample was crushed, hand-sorted to get lump of malachite for contact angle measurement, and wet ground to obtain the size fraction −75 + 38 μm for the micro-flotation experiments and finer particles for the solubility, zeta potential, FTIR, …
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Flotation separation mechanism of malachite from calcite …
As shown in Fig. 2 a, the flotation recovery of malachite was first increased and then decreased with the improvement of slurry pH value. When the slurry pH was ∼ …
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Bioflotation of malachite using different growth phases of Rhodococcus
Overall, malachite flotation efficiency tends to increase with increasing bacteria concentration for both growth phases. ... The number of attached cell to malachite was measured as described in the Experimental Section 2.4. (B) Both types of bacteria were adsorbed on the mineral within 5 ...
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