Treating high-pyrite-containing ores has been problematic in copper flotation plants where selective separation of copper minerals from pyrite is challenging to achieve. Raising pulp pH is common for pyrite depression when pyrite feed grade is low. Whether raising pulp pH can equally depress pyrite in copper flotation when pyrite feed grade is high remains …
The ways to obtain successful Separation of Copper and Lead into individual Concentrates, several process approaches can be examined; bulk copper-lead flotation with a reverse flotation stage depressing copper, the same bulk flotation with a reverse flotation to depress lead and a sequential copper-lead-zinc flotation circuit as well as …
One particularly significant and recently studied waste stream is mine tailings, a byproduct of sulfide ore concentration procedure [].These tailings are transported to tailings deposits [] with a focus on achieving chemical and physical stability [2,6].To meet these objectives, it is imperative to remove toxic agents and potential …
Download Citation | On Nov 15, 2023, Richard Li Jie Lee and others published Evaluate the Depression of High-Concentration Pyrite in Copper Flotation by High-Chromium Grinding Media | Find, read ...
Froth flotation is a physicochemical process that has been used for more than a century in the concentration of copper sulfide minerals . This process is based on the wettability of copper mineral particles to recover the mineral species of interest and depress unwanted gangue. ... Although copper flotation and the effect of key …
1.1 The Flotation Process. Flotation with is one of the most important and widespread concentration methods, which is based on exploitation of the differential properties of valuable minerals and gangue, also known as wettability [].The flotation circuit generally involves a number of stages or subcircuits.
The fresh copper oxide mineral surfaces exposed during crushing and grinding have a significant effect on subsequent flotation [23], [24], [25], [26].Many dangling bonds exist on fresh mineral surfaces because of destruction of the original lattice bonds, and the copper oxide mineral surface often shows strong polarity because of the …
In the selective flotation test (2), the concentration contained 3.02 ounces gold and 6.00 ounces silver per ton and 17.00 percent copper in 9.1 percent of the original weight of ore. The reagents need were in pounds per ton of ore: lime, 8.0, and sodium cyanide, 0.6, ground with the ore; and potassium ethyl xanthatc Z-3, 0.05, with cresylic ...
At the Mount Isa copper deposit, framboidal or 'carbonaceous' pyrite has been an ongoing challenge to the copper concentration operation, reducing the flotation circuit's efficiency. Previous work by Yenial-Arslan et al. showed that high pyrite recoveries could be strongly linked to the prevalence of fine-grained pyrite.
This report provides a perspective on the amount of water used by a conventional copper flotation plant, including the makeup water required to compensate for water losses. Much of the global supply of copper originates from mines that also produce byproduct molybdenum, but for simplicity, a single copper concentrate has been modeled for this ...
To verify the phenomenon, the flotation of copper slags was optimized through the process flow of primary roughing and tertiary scavenging. ... the change of mineral concentration in the flotation cell with time can be described by the following ordinary differential equation: (12) dC dt = K 1 C where C is the concentration of …
This study examines the effects of simultaneously changing the operating variables of: (1) frother concentration and air flow rate, and (2) frother concentration …
Copper almost completely (94.4%) dissolved from the concentrate of flotation tailings under the optimal HPL conditions in H 2 O for 60 min and the copper concentration of PLS reached 2.9 g/L. Under the optimized extraction conditions, extractant LIX‒84I in kerosene extracted over 93.7% copper from PLS obtained from …
The roughing-table concentrate carries about 4 1/2 per cent. copper and 38 per cent. iron. Flotation and table concentrate mixed, forming the mill concentrate, assay 9 per cent. copper, 30 per cent. iron and 16 per cent. insoluble. Flotation tailing assays about 0.4 per cent, copper. The recovery by flotation is about 82 per cent.
The Flotation Process. Until quite recently copper ore had to be hand-picked if the extraction of the metal was to be economical. In fact, in the last century, ores of 4 percent grade were regarded as almost valueless. Today such ores (which would be regarded as relatively rich in copper) are scarce; the great majority of mines contain the ...
The bulk flotation of copper-lead sulfide ore in the first stage is easy because both chalcopyrite and galena have better natural floatability than other sulfide ores, and this is also an important reason for saving reagents. ... When the sulfuric acid concentration increased from 2.0 mol/L to 2.5 mol/L, the galena recovery decreased …
Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for …
The results showed that when the initial pH was 3, the initial copper concentration was 5000 mg/L, and the final pH value was controlled above 6.72, the copper in the wastewater was almost completely removed, and the final copper concentration was 0.27 ± 0.03 mg/L, which meets the Chinese electroplating discharge …
This study is focused on the froth flotation reprocessing of a copper mineral from flotation tailings. The effects of flotation parameters including pulp density, …
Sphalerite flotation and separation from other sulphide minerals are strongly dependent on pulp solution conditions such as pH and copper concentration but also temperature. The surface of sphalerite needs to be activated with copper ions to enable collector adsorption and therefore sphalerite flotation. It was found that the …
Froth flotation is an important concentration process that can be used to selectively separate hydrophobic materials from hydrophilic waste gangue. In a more simple context, froth flotation is one of the most popular operational processes for mineral beneficiation. ... The ores containing multiple metals, such as lead, copper and zinc, can be ...
Several attempts have been made to recover copper and cobalt from these ores via the hydrometallurgy route, including concentration by flotation [17]. Some have succeeded in satisfying the ...
It has been determined by flotation, zeta potential, and settling tests, that increasing calcium concentrations promote starch adsorption and reduce entrainment of hematite, whereas increasing ...
Fig. 2 shows that with increasing copper concentration, there is an increase in the collectorless flotation recovery of sphalerite from 2% without copper up to a maximum of 80–83% at copper concentrations of 1 to 1.5 × 10 − 5 M, followed by a decrease in recovery at higher copper concentrations. These changes in recovery with …
The basic factors, principles and variables affecting froth flotation are enumerated in condensed form below: Ore. (a) Mineralogical character. (b) Fineness of grinding. (c) Method of grinding. Agents. (a) Principal flotation agent. ("Oil") α Character. β Quantity. (b) Minor agent. α Character. β Quantity. Water. (a) Quantity with respect to …
The impact of fine size fraction, pH, polymer, and collector concentration on the compressibility and yield stress of copper flotation tailings was examined by Garmsiri and Hosseini Nasab . It was found that while yield stress increased with pH, compressibility decreased with polymer concentration.
The increasing complexity of ore deposits, declining ore grades and higher global demand for copper has resulted in increased ore processing by flotation plants around the world.
Copper flotation and sulfide mineral froth flotation share many of the same principles. To extract the valuable minerals from the gangue minerals, the sulfide ore is crushed and pulverized. ... For the concentration of sulfide ores, such as copper, lead, zinc, nickel, and molybdenum ores, it is especially useful. By separating precious …
It not only concentrates given minerals but also separates minerals which previously were inseparable by gravity concentration. This new process, flotation, whose basic principles were not understood in the early days, was given to metallurgists and mill men to operate. ... The copper concentrate from a copper lead zinc flotation circuit. …
According to previous reports, most of the copper is lost virtually in all operating concentration plants in particle sizes below 20 µm (50%) and above 15 µm (30–40%) fractions.[16–19] It is noted that the main …
The beneficiation of high talc-containing copper–cobalt flotation tailings was studied by centrifugal gravity concentration. It was found that copper and cobalt minerals were finely disseminated in the gangue matrix so that conventional gravity concentration using spirals and shaking tables would be ineffective.
Contact angle testing is the most intuitive test for determining the hydrophobicity of a mineral surface [22], [23].The effect of copper ions on mineral hydrophobicity was assessed by performing a contact angle test at copper ion concentrations of 2.5×10 −4 and 1×10 −3 mol/L, and the concentrations of sodium …
Ion flotation is an efficient separation technique for the recovery of metal ions from dilute aqueous solutions. Provided that both the collected metal and the surfactant are recovered from the phase, it could be considered as an alternative to ion exchange, adsorption or solvent extraction in hydrometallurgy. However, most studies …
A concentration of 25–30% is suitable for economical smelting of copper. The froth flotation technique was originally developed in about 1910 to raise the copper concentrations of the strip-mined ores of Bingham Canyon, near Salt Lake City [9], and was further perfected for the differential separation of lead, zinc, and iron sulfides at Trail ...
The flotation process may be considered an interactive system consisting of many chemical, operational, and equipment variables. Changing any one of these variables causes an overall system response change. This study examines the effects of simultaneously changing the operating variables of: (1) frother concentration and air …