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• Rougher concentrate recovery of 95% and 92% of copper from Composite and No.2, respectively. • The first two minutes of rougher flotation recovered over 85% of copper at a concentrate grade of 29% to 30% Cu. • The rougher concentrate analysis showed very low levels of any deleterious elements such as arsenic, lead, phosphorus etc.
treat copper porphyry ores. The application of coarse particle flotation techniques has the potential to achieve comparable metallurgical performance at significantly coarser primary grind sizings. ALS Metallurgy has been conducting both internal research and commercial test programs to investigate the
In order to overcome the difficulty of extracting gold from gold-bearing sulfide ore by cyanide process, flotation was adopted based on mineralogical analysis. Mineralogy shows that gold particles are of superfine structure and mainly enclosed by sulfide ores. Primary gold-bearing sulfide ore is fine-grained pyrite and arsenopyrite. The paper describes the effects of ratios and dosage of ...
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 ...
A sequential flotation process for the recovery of high-grade concentrates of copper, lead and cobalt-nickel from sulfide ores is provided. A primary grind ore pulp is conditioned with SO 2 as H 2 SO 3 under intense aeration, and the conditioned pulp subjected to sequential flotation, with regrinding and conditioning of a copper rougher concentrate obtained in the first flotation step for copper.
On the other hand, the effect of the input values, i.e. the Cu content in the flotation feed (input function) and the level of pulp in the flotation machine is relatively small and the mass flow rate of ore to the rougher flotation has no significant effect on …
These ore variability programs often test hundreds of samples in standardized batch rougher and cleaner tests to ensure that the orebody is well understood.This article describes the development of a copper-molybdenum flotation process, but the concepts discussed can be applied to most sulfide flotation systems and many industrial minerals ...
1. Changes in mining and processing. The dramatically increasing cost in mining owing to rising water, power, reagent and steel prices, less favorable ore characteristics, lesser oxide ores and dominance of primary sulfide feeds coupled with economic aspects of sustainability require a large re-focus of operations on process mineralogy.
2 Mineralogical investigation and chemical assays showed that Ore A had a relatively simpler ore texture and low Zn content. The test performed at the Base Condition (BC) produced a copper rougher concentrate at 71% copper recovery . Pyrite flotation was applied on the copper rougher tail using TomAmine at pH 10.5–11.
In this case, the hypogene ore carried a range of copper sulphides including chalcopyrite (26.3%), bornite (50.9%), and chalcocite (17.1%), with minor covellite, occurring at a very small mean grain size of 7-27 μm. It would be uneconomical to grind the ore down to these sizes to deliver good liberation before flotation.
One Locked-cycle Test conducted on a sample of the master composite using a primary grind of 75 microns and several stages of regrind achieved a final copper …
Copper concentrators typically treat up to 100 000 t of ore per day. They are located directly at the mines to achieve low transport costs. The copper recovery efficiency is over 90 %. About 95 % of the ore input goes into the tailings, which are stored in large dams near the mine and are used for water recycling to the flotation stages.
Copper sulphide liberation for the Lab Composite measured about 48 percent when measured in two dimensions, which would be considered slightly low for good rougher circuit recovery. Typically, liberation values of about 50 to 55 percent are targeted in the primary grind for good sulphide rougher circuit performance. Unliberated copper sulphides ...
Figure 5. Copper flotation recovery by size (P. D Munro and S.E Munro (2015) derived from public data presented by Rio Tinto staff with Cadia East data added) The recovery of coarse copper sulphide composite particles via flotation is a function of inherent ore body mineralogical properties, surface chemistry and hydrodynamic conditions such as:
For example, a copper ore grade of 1% means that in 100 tons of the ore, we have 1 ton of copper. If the copper ore contains 40 tons of calcite gangue, we can also say 40% of calcite in the ore. A gold deposit with a grade equal to 5 g/t (gram per ton) means that in one ton of the ore, we have 5 …
The laboratory grinding and flotation procedure for this ore, as shown in Fig. 3, consisted of primary grinding followed by a rougher flotation stage; the rougher concentrate was then subjected to either no regrinding, low level regrinding or medium level regrinding before a stage of cleaner flotation to generate a bulk Ni–Cu concentrate. In ...
For more than a century now, flotation has been at the heart of the mineral processing industry. In this month's SPOTLIGHT FEATURE ARTICLE, direct from the November issue of INTERNATIONAL MINING magazine, John Chadwick examines new technologies and applications from some of the key players in mineral flotation, a technique that is so important to the global industry.
At Cadia, composite particles are the principal carrier of gold and copper in the rougher tailings making up 50–60 percent of the contained value in 2–5 percent of the mass. Over 50 percent of the composite particles in rougher scavenger tailings are in the lowest sulphide exposure range <10 percent, where recovery via the existing ...
Copper recovery tends to reduce with increasing grind size – the difference is marginal between 38um (96.9% Cu recovery) and 53um (97.2% Cu recovery); In overall terms the Cu grade recovery response and ability to recycle cleaner tailings streams during Rougher Cleaner flotation indicate we could adopt a coarser primary grind (P 80
Particle Flotation Techniques on Copper Sulphide Ores Canadian Mineral Processors Conference 2017 Peter Mehrfert - ALS Metallurgy ... Grind to P 80 values finer than 200μm 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 40 45 50 ... coarse primary grind, separate rougher recovery of coarse and fine portions 400µm P 80 HydroFloat Tails ...
in the concentrate, while minimizing the energy input. 5. Stages of Flotation a) Roughing The first stage is called roughing, which produces a rougher concentrate. The objective is to remove the maximum amount of copper as coarse a particle size as practical. The finer an ore is ground, the greater the energy that is required,
The ore used in this test series generally produced a good grade of rougher concentrate. EXAMPLE 3. Polyglycerol (HL-80) was again added to tap water and was used to float copper sulfide ore which tends to make a higher weight of rougher concentrate and was a difficult to float ore…
Oxidative weathering of a copper sulphide ore and its influence on pulp chemistry and flotation S. Jacquesa,⇑, C.J. Greetb, D. Bastinc a Magotteaux Andino SA, Panamericana Norte Km. 37 S/N, Til-Til, Santiago, Chile bMinerals Processing Research, Magotteaux Australia Pty Ltd, PO Box 54, Mansfield Park, SA 5012, Australia cUniversity of Liège, Laboratory of Minerals Engineering and ...
Trains deliver ore from the open pit to the Coarse Crusher Dump Pocket. A remotely controlled jack empties each ore car sequentially into the Primary Crusher (60"gyratory) that is capable of crushing ore at an average rate of 1852 short tons/hr, with peak loadings up to 2150 short ton/hr.
the rougher circuit while the rougher flotation recovery of mixed copper ore was 8% less than the sulfide ore. Additionally, the incr ease of collector and …
from each other. For this, crushing and grinding steps are performed before the actual concentration is done. However, overgrinding is unwanted because it increases ... tons/day of a copper-zinc ore. The ore is a volcanogenic base metal sulfide averaging ~2.7% Cu and ~3.6% Zn. The ... and the primary rougher tail (PRT) were further ...
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.
In 2011, about 60 percent of primary copper produced in the United States originated from flotation (Daniel E. Edelstein, Copper Commodity Specialist, U.S. Geological Survey, written commun., March 20, 2012). Copper sulfide ores must be concentrated before they can be economically transported to …
At a blend of 70% sulphide ore and 30% oxide ore, the rougher scavenger copper recovery was as high as 95.5%. The copper recovery from the blended ore using a mixture of collectors was shown
Froth flotation is a process for selectively separating of hydrophobic materials from hydrophilic.This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.
by flotation technique. The petrography studies indicate that the ore primarily consists of quartz and graphite with minor quantity of mica. It analyzed 89.89% ash and 8.59% fixed carbon. The ore was crushed in stages followed by primary coarse wet grinding to 212 µm (d80). Rougher flotation was carried out in Denver flotation cell to eliminate
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 sufficiently to make a high grade copper concentrate, thus some form of regrinding is necessary ...
This invention relates to a process for recovering valuable metals from ore with significantly reduced water consumption through the discrete treatment and storage of coarse tailings. Ore is ground to produce a coarse particulate ore. The coarse particulate ore is treated in a coarse flotation stage to produce a low grade concentrate fraction and a coarse tailings fraction.
