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 …
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 …
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 …
There are several flow sheets (listed in Fig. 1 a and b) used in the flotation recovery of copper and molybdenum from their porphyry sulfide ores. Fig. 1 a is a typical flow sheet that consists of two stages (Raghavan and Hsu, 1984, Bulatovic, 2007, Liu et al., 2011).The first stage, commonly known as the copper circuit, produces a bulk copper …
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 ...
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 influence the tons of fine copper as follows: Fine copper ton = % entry copper grade *% metallurgical recovery * tons of ore processed.
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 …
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 ...
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 …
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
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 …
Primary ore copper mineralisation is mainly chalcopyrite with minor bornite. The major challenges to the copper-gold fl otation 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-
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 ...
A Copper Flotation Flowsheet. Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper operations must be relatively large in order to be commercial. The flowsheet in this study illustrates a typical 3,000 ton per day operation. In general most operations of this type have two or more …
Conventional ball mills, adequate for primary grinding, usually bring about low energy efficiency with products below 50 µm. Vale is using the vertical mill on its copper …
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 …
Grinding and Classification. Collecting conveyors supply 2,000 t.p.d. of ore to the feed belts of three independent primary grinding circuits. The No. 2 grinding circuit comprises a 8′ x 72″ Hardinge conical ball mill in closed circuit with a 6′ x 14′ Hardinge counter-current classifier.
At the 125µm P80 primary grind size sphalerite is well liberated at about 60%. This level of liberation is, in our experience adequate to ensure successful flotation in the zinc rougher circuit. Flotation Process Development and Assessment; Mineral Composition and Fragmentation; Evaluating Copper Rougher-Scavenger Flotation …
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 …
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 …
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
Primary ore copper mineralisation is mainly chalcopyrite with minor bornite. The major challenges to the copper-gold fl otation process are a wide size distribution of …
In this work, the performance of Gaussian Process Regression (GPR) models in predicting rougher copper recovery, following development with and without model-selected, relevant rougher flotation variables has been investigated. Randomly selected training and validation data sets as well as an independent testing data set …
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.
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 …
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 ...
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 …
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 …
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 …