mental results from single-stage batch flotation of the Morenci copper/molybdenum concentrate are presented in Fig. 1, which describes the effect of ozone conditioning time on flotation recovery and concentrate grade. Chalcocite is quickly depressed upon contact with ozone, as is evident by the significant drop in copper recovery during theWeb

As ore grades constantly decline, more copper tailings, which still contain a considerable amount of unrecovered copper, are expected to be produced as a byproduct of froth flotation. This research reveals the occurrence mechanism of copper minerals in typical copper sulfide tailings using quantitative mineral liberation analysis (MLA) …Web

Flotation kinetic fitting results of cumulative copper recovery of various size fractions as a function of flotation time are shown in Fig. 5 and Table 6. The maximum recovery ( R ∞ ) increased gradually from model 1 to model 6, while the R ∞ values of models 3–5 are basically equivalent.Web

Rate parameters obtained in laboratory study To investigate the effect of feed fines on the flotation performance, two different samples (d80= +312 µm and d80= -312 µm) were prepared and used in laboratory flotation …Web

The average grade of copper in the flotation concentrate was 25.42% Cu at a recovery of 75.8%. These days attempts are being made to replace chemical reagents with bio-based products. The microbial flotation process involves the application of microbes and microbial metabolites as alternatives to commercial reagents [ 30, 51, 83 ].Web

Many copper flotation plants around the world, and particularly those in the Americas, have enough gold in the ore to ensure that special attention is given to maximize the recovery of gold into the copper concentrate. There has been a significant increase in the availability of selective flotation collectors for gold, and these are now widely ...Web

Solutions containing copper ions are produced at copper mines due to its dissolution from ores and dumps. It is important to recover these ions to prevent this toxic element from entering the environment and because it could be economical. We investigated the use of ion flotation for extracting Cu ions from diluted mine water from …Web

Even though these minerals occur in relatively small amounts they can often be economically recovered as by-products for the expense of mining, crushing, and grinding is absorbed in recovery of the …Web

The predictive flotation models for blended ores in this paper will focus on copper content and recovery using four types of complex copper–gold ores of Madneuli mines. 1.1 . Geometallurgical modelsWeb

This reagent was developed especially for the flotation of oxidized copper ores. The amount of these promoters varies considerably. If the ore is partly oxidized, it may be necessary to use as much as 0.30 …Web

Bulut G (2006) Recovery of copper and cobalt from ancient slag. Waste Manag Res 24(2):118–124. Article Google Scholar Bulut G, Perek KT, Gül A, Arslan F, Önal G (2007) Recovery of metal values from copper slags by flotation and roasting with pyrite. Min Metall Explor 24(1):13–18. Google ScholarWeb

The results showed that about 90% copper recovery with 10% copper grade could be achieved by using a 1.5 kg/t oleic acid collector at pH = 10, 7 dm 3 /min air flow rate and 5 min flotation time. The …Web

After lead flotation at optimum pH 8, the flotation of zinc at a different pH (5–11.5), with two collector types, was performed to study the recovery and grade of zinc in the zinc concentrate. Figure 8 shows the grade and recovery of zinc in the zinc concentrate using PAX or Aero 3477 collectors at pH 5–11.5.Web

Flotation conditional tests were carried out to find out the optimum dosage for flotation kinetic study with various size fractions. Six flotation kinetic models were adopted for fitting the test data of copper, lead and gold recovery. The origin 8.0 software was employed for calculation of the flotation rate. AcknowledgementsWeb

Misreported copper into tailing dramatically declines copper recovery. This study aims to find the possible reasons of copper loss to tailing and present the methods to improve the performance of ...Web

Chen et al. (2017) reported the decrease in copper flotation recovery from 95 to 63.6% with an increase in pulp viscosity from 0.109 to 0.147 Pa s in the presence of 30 and 50 vol.% of amorphous silica (in amorphous silica and quartz suspension), respectively. In flotation, pH control is a vital method to control selective mineral separation. ...Web

The capacity of the flotation system is 33,000 t/d. The ore grade fed to the third plant is 0.25–0.45%. The copper recovery of flotation plants is higher than 90% with particle size of P80–200 mesh. Table 5 shows the composition of concentrates.Web

For all three metals, significant ion recovery is observed with surfactin flotation, with 75% of Cu 2+, 95% of Ni 2+, and 98% of Co 2+ recovered into the overflow after 50 min of flotation, concentrating the ions up to 225 M (mu), 267 M (mu), and 259 M (mu) respectively. This compares well to other surfactants reported in the ...Web

Misreported copper into tailing dramatically declines copper recovery. This study aims to find the possible reasons of copper loss to tailing and present the methods to improve …Web

The flotation results show that the recovery of copper and molybdenum decreased with the increasing copper oxidization degree. In addition, the recovery of blended ore can be predicted via the flotation rate equation, using the maximum recovery (Rmax) and flotation rate coefficient (k) determined from the flotation rate analysis of …Web

Figures 9 and 10 show clearly that there was a marked increase in the overall recovery of copper after the tailings of the 1 st stage flotation were milled to 90% passing 45 microns and floated. In the case of conventer and mixed slag, increases of over 10% in the recovery were recorded when both FC4146 and FC7245 were used as secondary ...Web

Mass VS Copper Recovery | Copper Recovery VS Total Sulfur Recovery | Copper Grade VS Copper Recovery. PS: in case you need help evaluating a grade/recovery curve… Flotation assays do provide much information which can and need be analized in details. For example a piece of data often overlooked is a the creation of a …Web

Asghari et al. investigated the improvement of copper recovery in an industrial flotation circuit (Sarcheshmeh copper mine), and stated that about 95% of overall copper lost in final tailing was in the rougher circuit while the rougher flotation recovery of mixed copper ore was 8% less than the sulfide ore. Additionally, the increase of ...Web

Recovery of copper in concentrates from slags cooled in the induction furnace and ground for 30 minutes ranged from 87.1 to 96.2 percent with the best recovery obtained on the highest grade slag sample. Copper content of the flotation tailings, which is the most important indicator, ranged from 0.26 to 0.39 percent.Web

With the industrial depletion of high-grade copper sulfide resources increasing, the recovery and utilization of copper oxide ore have gradually become a substitute for copper resources [1,2].Froth flotation is an economic separation technique which has been widely used in the copper mining industry to recover copper minerals from gangue …Web

The total copper recovered from its ore through flotation process is about 56% [ 6, 18 ], which indicates that the flotation tailings still contain valuable copper components such as chalcopyrite. In addition, old flotation tailings sometimes have a …Web

Research works done have shown that recovery is optimum at particle sizes ranging from 15 to 150 µm, evident in the recovery to particle size plots. The effect of particle size on flotation ...Web

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 …Web

The recovery of these copper minerals by flotation or hydrometallurgy from ores, typically containing 0.5%TCu (open pit …Web

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 ...Web

In copper recovery from such low-grade sulphide ores, it is customary to use hydrometallurgical processes (leaching, solvent extraction and electrowinning) or beneficiation is performed by froth flotation (including crushing, grinding, flotation, thickening and drying of the concentrate), which is followed by pyrometallurgical …Web

The zinc recovery was higher than the copper recovery during the entire flotation test. Better Cu–Zn selectivity was obtained in the initial stages of flotation at 1 kg/t Na 2 S, but it could not be maintained …Web

Prediction of metallurgical responses during the flotation process is extremely vital to increase the process efficiency using a proper modeling approach. In this study, two new variants of the recurrent neural network (RNN) method were used to predict the copper ore flotation indices, i.e., grade and recovery within different operating …Web

Predicting Flotation Recovery. Unfortunately, many milling engineers rely rather heavily on percent recovery as a strict measure of a concentrator's relative performance. The fallacy of this reasoning is not …Web

According to the plant experience, the quality of the process water in copper flotation circuit does not impact much on copper recovery, but for the nickel flotation circuit, the increase in impurities in the nickel circuit process water decreases the nickel recoveries. Recycled water from nickel thickener overflow accounts for less than 10% of ...Web

Flotation Results. Figure 2 shows the effect of grinding fineness on recovery rate of copper. It is observed that a rise of the proportion of the grinding fineness of −0.074 mm from 60 to 80% obviously increased the copper recovery, then decreased when it exceeded 80%. This is because the initial appearance was dissociation fragmentation ...Web

Molybdenite in porphyry ores is a byproduct of copper concentrate, therefore it is more reasonable to establish both the grinding size and the flotation scheme for copper minerals. [8] Fig. 19 (a) [13] displays the average size by size recovery of molybdenum and copper for 18 months in the Bingham Canyon mine. The highest …Web

A brief statistical analysis has shown that froth flotation is a reliable process to recover copper from flotation tailings. • Collector dosage remains the main parameter …Web