The overall flotation process is composed of various workflow units including grinding, grading, rougher, cleaning, and scavenging, etc. and thus is a complex non-linear multivariable process (Gui et al., 2013). ... (2005). At the same time, the process parameters including copper ore grade, feeding rate, pulp level, and pulp concentration …
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Under the current operating strategies i.e. relatively fine primary grind size, copper/pyrite sequential flotation and allowance of partial pyrite recovery into the copper …
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Several authors have demonstrated improved liberation on copper sulphide, iron sulphide and native gold-containing ores after microwave treatment and subsequent grinding (Amankwah et al., 2005, Andriese et al., 2012, Wang and Forssberg, 2005).Other studies have also demonstrated increased flotation recovery and concentrate grade …
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Black Butte copper project reserves. The Black Butte copper mine is estimated to contain 15.7 million tonnes (Mt) of measured and indicated mineral resources grading 3.4% Cu, and containing …
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Here, rougher flotation is most Selective at a pH of 9.5 as pH levels in the 9 to 10 range yielded 1% to 2% better recoveries. Mineralogy data also supports this and shows between 3% and 10% of the copper …
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The parameters that were significant are the six shown in Table 1. It should be noted that the law variables of copper concentrate and metallurgical recovery …
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The major challenges to the copper-gold flotation process are a wide size distribution of chalcopyrite mineralisation and poor primary grind liberation, a high pyrite content in skarn ore requiring aggressive pyrite depression conditions, clay-rich gangue and non-sulfide copper mineralisation in weathered zones, and a significant association of ...
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The amount of copper in copper sandstones and slates varies from 1 to 6%, in sulfide copper-nickel ores from 1.1 to 4.9%, in copper-pyrite ores from 0.1 to 3%, and in copper-porphyry ores from 0.4 to 1.2%. Up-to-date technological solutions, effective reagent flotation schemes, high-performance equipment, and integrated approaches …
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WEBAn example of a copper metallurgy study where the effect of primary grind on rougher flotation each of the GeoMetallurgical samples was investigated. A simple economic …
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The mean P 80 of the primary grind for the data in Table 1 was 167 μm, though a clear trend to increasing grind size was evident almost from the time milling commenced. For some ore types, a clear deterioration in recovery was evident for P 80 values above 160 μm.
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Our ore is chalcopyrite with very minor traces of oxide copper.We are grinding between 150um and 200um.Our flotation feed grind size is P80 @ 150um (design criteria) at densities between 25 and 35. Reagents we are using are Aero 3894 and/or MX965 as collectors and W22 as frother. We are not using any depressant as the pyrite in the ore …
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Porphyry copper ores, usually medium to medium hard, require grinding to about 65-mesh to economically liberate the copper minerals from the gangue. Although a clean rougher tailing can often be achieved at 65-mesh the copper mineral is not liberated ...
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primary crushing . Crushing is usually a dry process and carried out on ROM ore in succession of two or three stages namely by (1) primary (2) secondary and (3) tertiary crushers. Primary Crusher. Primary crushers are heavyduty rugged machines used to crush ROM ore of (−) m size. These largesized ores are reduced at the primary …
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Fig. 2 shows the P 80 of different mineral species in an ore for a major copper operation. These values vary significantly, with the P 80 of total solids, sulfide minerals, iron minerals, copper minerals and molybdenum are ∼ 200, 105, 125, 94 and 85, respectively. Flotation optimization of complex ores often requires a better understanding …
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Whiteman et al. [21] investigated a copper sulfide ore with the disseminated particle size of 10-27 . μm in average from a deposit of Congo. The three best performance grinding ... process parameters of coarsegrained bulk flotation after primary grinding were opti--mized. It may provide a new view and method to utilize the connection between ...
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An example of a copper metallurgy study where the effect of primary grind on rougher flotation each of the GeoMetallurgical samples was investigated. A simple economic study was conducted on these copper flotation results, using typical power costs and a net smelter revenue value for copper of 90 cents. This indicated that the optimum grind was …
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Optimizing Regrinding Capacity. The justification, for including regrinding of a concentrate or middling in the design of any new copper flotation plant, should be that a …
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In order to represent the pyrite flotation behaviour in the rougher stage at Telfer, 90 wt.% flotation recovery was achieved by increasing the reagent dosage and adding copper ions as the activator. Fig. 2 shows pyrite flotation recovery as a function of flotation time with stainless steel grinding media. In the absence of copper ions, pyrite …
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Ball consumption would, therefore, be 1.22÷5.693 = 0.214 lbs. balls per KWH input to the mill. For the Pinto Valley concentrator ball consumption should, therefore, be 0.214 x 8.39 = 1.80 pounds per ton. Ballmill liner consumption was again estimated from Copper Cities experience as 0.015 pound per KWH of primary grinding energy.
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Copper recoveries of 88.3%, at a concentrate grade of 39.0% copper, were achieved using a composite sample - an improvement on the previously published 85.9% life-of-mine average copper recovery ...
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Effect Of Primary Grind Size On Mineral Liberation. The extrapolated ore fragmentation and copper sulphide liberation plots reveal that the liberation levels and hence the flotation responses of the minerals would be essentially constant across a broad range of flotation feed sizing. This observation would indicate that flotation feed sizing ...
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Example Locked Cycle Test Results. Locked cycle tests were conducted on each of the super composites, using the flowsheet shown below. The flowsheet consisted of a primary grind to a P80 of 150 µm, followed by rougher flotation at pH 9.5 to produce a bulk sulphide concentrate. The rougher concentrate was reground to a P80 of ~30 µm …
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The copper grade/recovery curve produced for tests where the plant copper rougher concentrate was split into its two size fractions, the coarse fraction (+20 microns) ground and then recombined ...
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Both copper and gold values in the ore were readily recoverable by froth flotation (87.1 07o copper rougher recovery and 86.8*^ gold rougher recovery). However, the high concentrate weight (2607o) and low concentrate grade (2.607o Cu and 37.0 g/t Au) indicate that extensive cleaning with regrinding would be required to produce a
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A low grade graphite ore from eastern India was beneficiated by flotation to improve its quality. The ore was composed of 87.80% ash and 8.59% fixed carbon. Primary coarse wet grinding ( d80: 186 μm) followed by rougher flotation in Denver flotation cell using diesel as collector and pine oil as frother yielded a rougher concentrate.
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28 million t of porphyry copper ore per year, where the initial content of copper in the ores is 0.4%. The rougher flotation feed is the tertiary grinding overflow of 80% passing –65 …
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All screens are fitted with 5/16″ square mesh screen cloths. Screen undersize is conveyed to the 6,600 ton capacity fine ore bins ahead of the grinding plant. CHINGOLA OPEN-PIT ORE RECEPTION AND CRUSHING—Ore from the pit, delivered by rail, is dumped into a ground storage bin of 1,800 ton live capacity. A D4 reclaims this ore ...
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The major challenges to the copper-gold flotation process are a wide size distribution of chalcopyrite mineralisation and poor primary grind liberation, a high pyrite content in skarn ore requiring aggressive pyrite depression conditions, clay-rich gangue and non-sulfide copper mineralisation in weathered zones, and a significant association of ...
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Masdarian, M.; Azizi, A.; Bahri, Z. Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency. Chin. J. Chem. Eng. 2020, 8, 743–748. [Google Scholar] Azizi, A. Optimization of rougher flotation parameters of the Sarcheshmeh copper ore using a statistical technique.
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The amount of copper in copper sandstones and slates varies from 1 to 6%, in sulfide copper-nickel ores from 1.1 to 4.9%, in copper-pyrite ores from 0.1 to 3%, and …
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