Sodium sulfide is one of the most widely used alkali metal sulfides in the flotation of copper, lead, and zinc minerals in their oxidized form. The sulfidization process, developed in the U.S.A. in 1915-20 for oxide copper minerals flotation, is especially suitable for oxidized lead ores in which the gangue is usually basic.

Understanding flotation kinetics and selectivity is essential for manipulating copper flotation process involving amorphous silica. Flotation kinetics refers to the rate …

In this study, the flotation performances of ethoxycarbonyl thionocarbamate (ECTC), dialkyl thionocarbamate (DATC) and xanthate copper sulfide collectors are compared by the structure-reactivity relationship using generalized perturbation theory and density functional calculation at the B3PW91/6-31G(D) level. The electron-donating …

Wet milling in ball mills followed by flotation is the general practice employed in the beneficiation of copper sulphide ores in which the major minerals of commercial significance typically are chalcopyrite (CuFeS 2), bornite (Cu 5 FeS 4), covellite (CuS) and chalcocite (Cu 2 S). The flotation response of ground minerals can be influenced by the …

As can be seen from Fig. 8 (a), in the copper-lead separation flotation, the values of SE present an initial increase and then a decreasing tendency with the continuous increase of particle size, and the maximum value of SE was obtained with the size fraction −74 + 58 μm, followed by the −43 + 20 μm size fraction and − 58 + 43 μm size ...

The flotation of copper from copper-tin alloy was also conducted in an XFD flotation machine with 0.5 L cell volume, under following conditions: natural pH, the pulp concentration is 30%, 300 g/t of ADD and 50 g/t of terpineol for copper rougher; and 100 g/t of ADD for copper cleaner, as shown in Fig. 2. Finally, a rich copper …

A maximum recovery of copper was 88,58% while the grade was 2,88 with 32,29 copper oxide on the total massive copper under the flotation conditions: 1,15 pulp density, 10 g/t dosage collector, 10 g/t dosage frother, and 50 g/t dosage dispersant and the maximum grade 12,24 while the recovery was 47,02% under the flotation conditions: …

A maximum flotation rate of pyrite at pH 9.0 was obtained at copper sulphate and SIPX concentrations of 1000 and 120 g/t, respectively. Higher copper sulphate concentrations produced a lower rate of pyrite flotation as a result of copper hydroxide precipitation on the pyrite surface as detected by XPS (Boulton et al., 2003).

In previous years, numerous methods have been developed on the recovery and utilization of valuable metals in copper smelting slags, which can be summarized as pyrometallurgy [26], hydrometallurgy [27] and flotation [28].Through pyrometallurgy of copper slags, the precipitation of suspended matte (Cu 2 S) droplets is promoted into …

The focus of this research was to compile fundamental information on the flotation of silver-bearing minerals. The data reported in this paper represent a preliminary effort to understand the fundamental flotation behavior of silver minerals. Tests were conducted in a microcell flotation apparatus to observe trends in flotation response.

Sulphidising flotation of oxide copper–cobalt ores with sodium hydrosulphide used as sulphidising agent is common practice in Katanga, Democratic Republic of Congo.From laboratory investigations ...

A laboratory scale, unstirred flotation column (Fig. 2) was used for the dynamic froth stability experiments in a modified Bikerman test.This set up is similar to the systems used in a variety of other studies (Ip et al., 1999, Cilek and Karaca, 2015, Li et al., 2017).The column was 157 cm tall with graduations on the front wall and a square cross …

Response surface methodology is used to optimize the leaching process for refractory flotation copper tailings. The proportion of the refractory combination oxide copper (chrysocolla) is 64.84%. At present, few studies have examined the leaching of chrysocolla. In this study, we examine the effects of several variables, including the …

These iron oxides and hydroxides are particularly prejudicial for flotation if they precipitate on the surface of the copper minerals because they are not collectable with xanthates (Woods, 2003). Table I. Copper minerals present at the Kansanshi Mine. Mineral Mineral formula Mineral Mineral formula Chalcopyrite Bornite Covellite Digenite

Flotation is widely used to concentrate copper, lead, and zinc minerals, which commonly accompany one another in their ores. Many complex ore mixtures formerly of little value have become major sources of certain metals by means of the flotation process. This article was most recently revised and updated by

The XFGⅡ laboratory flotation cell (Wuhan Prospecting Machinery Factory, China) was used for microflotation experiments. Three solid mineral samples including CuO, SiO 2 and artificial mixture of CuO and SiO 2 were prepared. For each flotation experiment, 45 mL of DI water and 5 g of the solid mineral samples were mixed in the …

The standard technique for processing the copper sulphide ores is by flotation, which is both economical and suitable as per the environmental standards. The most important factor in flotation of sulphides is the choice of reagents. In the past, industrial flotation experiments with the various copper minerals were generally …

Flotation testing indicated that an increase in copper recovery of approximately 1% could be achieved, or that a grind size increase of approximately 30 μm may potentially yield equivalent copper recovery due to the microwave-enhanced liberation observed. However, statistical analyses demonstrated that it is difficult to attain …

Ackerman et al. (2000) evaluated the influence of different substituent structures on the flotation of copper sulfide minerals and pyrite and demonstrated a relation between them does exist. Liu et al. (2008) found the relation of efficiencies of N-substituent thionocarbamates with the properties such as energies and compositions of …

A maximum recovery of copper was 88,58% while the grade was 2,88 with 32,29 copper oxide on the total massive copper under the flotation conditions: 1,15 …

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% copper. This flowsheet, though simple, is adequate for tonnages of 100 to 500 tons or more per day, depending on the size of equipment ...

Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are …

The copper flotation section produces a copper concentrate through two stages of flotation as shown in Fig. 1. Flotation reagents are added through the conditioning tank, TKF2. Cytec's Aerofloat, a dithiophosphate, is used as a collector and Interfroth 63 is added as a frother. Sodium meta-bi-sulphite (SMBS) is added to control …

Understanding flotation kinetics and selectivity is essential for manipulating copper flotation process involving amorphous silica. Flotation kinetics refers to the rate at which valuable mineral particles attach to air bubbles and report to the concentrate during the flotation process, and it is typically described by mathematical kinetics models [13, 14].

The separation efficiency of flotation copper is 85.45%, indicating that this copper sulfide ore can be effectively recovered using this separation process. In …

Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are ...

Ammonium sulfate is considered to be a good activator of copper oxide ore, and thus is widely used in industrial practice. Industrial practice in Dongchuan, Yunnan, showed that when (NH 4) 2 SO 4 is added prior to sulfurization, the recovery of copper oxide minerals can be increased by 3–7 percentage points, and the amount of sodium …

AMA Style. Geng Q, Han G, Wen S. Flotation of Copper Sulfide Ore Using Ultra-Low Dosage of Combined Collectors.

1. Introduction. Flotation is an important and versatile mineral processing step used to achieve selective separation of minerals and gangue. It utilises the hydrophobic (aerophilic) nature of mineral surfaces and their propensity to attach to rising air bubbles in a water–ore pulp as the basis for separation [1].Metal sulfide minerals, for …

The mass recovery (a), copper recovery (b) and copper grade of flotation concentrates (c) after 10 min flotation as a function of the percentage of amorphous silica. Fig. 4 (a) indicates that the mass recovery increased with the percentage of amorphous silica until the percentage reached 30 vol%, and then started to decrease …