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 ...

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 ∼ …

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 ...

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 …

Bench-scale selective bioflotation tests were carried out in a 1 L Denver cell using Rhodococcus opacus (R. opacus) cells as a collector in malachite–silica binary mixture and copper (Cu) oxide ore systems.Through the first set of tests carried out on the binary mixture, cell concentration and malachite fraction in the feed were optimized, …

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 …

Sulfuration flotation is the most widely used technology in malachite beneficiation. However, the inhomogeneity of malachite surfaces usually results in a non-uniform sulfuration surface. The …

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 …

A natural malachite sample was obtained from the Lupe mine, Puebla, Mexico. The sample was crushed, hand-sorted and dry-ground to obtain different fractions for different applications, namely, lumps for contact angle measurements, particles of −75 + 38 µm for micro-flotation tests, and fine particles for zeta potential measurements.

Sulfidization xanthate flotation remains the most promising method for the beneficiation of malachite. In this study, L-arginine (LA) was first used to modify the malachite surface and improve the efficiency of sulfidization flotation. The performance of LA was evaluated by the flotation experiments. The mechanism of interaction between …

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 ...

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.

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 ...

After that, the flotation was conducted for 4 min. The floated and unfloated minerals were separately filtered, dried and weighed to calculate the flotation recovery of malachite. The batch-flotation tests were carried out using an XFG-IV flotation machine with a 500 mL flotation cell.

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.

The flotation was carried out in a 0.5-L flotation cell (XFDIV; Jilin Mine Exploration Machinery Factory, Jilin, China). Tap water, with a pH of approximately 7.4, was used in the flotation. After the pulp was agitated for 2 min, TEA (3000 g/t) was introduced and the mixture was further agitated for an additional 5 min.

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 ...

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 …

Ammonium sulfate [(NH 4) 2 SO 4] is an effective activator of malachite sulfidization flotation.In this work, we explored the effects of ammonium ion (NH 4 +) and copper ion (Cu 2+) on malachite sulfidization flotation and investigated the underlying mechanism.Flotation experiments demonstrated that NH 4 + can not only eliminate the …

The relationship between the structure of bis (2,4,4-trimethylpentyl) phosphinic acid (BTPA), diethyl phosphinic acid (DEPA), and diphenyl phosphinic acid (DPPA) on the flotation performance of …

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 …

The flotation performances of malachite and calcite as a function of pH with 1.0 × 10 −4 mol/L CMDTP as the collector were displayed in Fig. 3, in which, it is clear that the recovery of malachite decreases sharply when the pulp pH is greater than 9.0, while within pH 6.0–9.0, malachite could float out with a good flotation recovery of ...

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 …

Malachite is one of the most important copper-bearing oxide minerals; however, it shows poor floatability prior to sulfidization under the thiol collector system. …

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 …

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 …

Sulfidization flotation tests were conducted using an XFGII micro-flotation machine containing a flotation cell with an effective volume of 40 mL. For the single …

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 …

Malachite is one of the most important copper-bearing oxide minerals; however, it shows poor floatability prior to sulfidization under the thiol collector system. This study investigated the reasons for the low …

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 ...