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Minto Mine is a highgrade copper and gold mine that is located 240 km north of Whitehorse, Yukon. Operations are ongoing at this time and began in October 2007. Minto processes both openpit and underground ore using conventional crushing, grinding, and flotation to produce copper concentrates with significant gold and silver credits.
the copper mineralogy remaining diverse and varying from native, oxide, secondary, and primary copper species within short time periods. The development of the Phu Kham fl ow sheet was driven by the poor recovery in comparison to other lowgrade coppergold ores, and a need to counter decreasing ore grades from 2013.
Mine development plan increases processing capacity to 85,000 t/d Project Gibraltar Copper Mine. ... The project incorporated additional primary grinding, secondary grinding, regrind, rougher flotation, cleaner flotation, concentrate filtration and tailings pumping capacity as well as various ancillary systems and upgrades. ...
Primary Grinding Primary Cyclones HydroFloat CrossFlow Classifier Cleaner Mechanical Rougher/Scavenger Regrind Mill Regrind Classifiers Fine Tails Final Conc. Secondary Cyclones Traditional Copper Sulfide Circuit Future Circuit with the HydroFloat™ Separator A traditional circuit requires grinding of the ore to sufficient liberation ...
The Effect of Regrinding Chemistry and Particle Breakage Mechanisms on Subsequent Cleaner Flotation ... rougher flotation after primary grinding, it is usually more challenging to achieve a satisfactory ... 4. Effect of particle breakage mechanisms on subsequent flotation. In this study, it was found that copper activation of pyrite and its ...
Froth flotation is a process for selectively separating hydrophobic materials from is used in mineral processing, paper recycling and wastewater treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century.
The flotation experiments for the various blends were repeated several times in order to assess reproducibility of the results. As an example, values of chalcopyrite (Cp) and pyrite (Py) recovery after 10 min of flotation, and the first order flotation rate constant (k) for three tests with 20% pyrite content are summarised in Table 2.
The primary ore zones were comprised of more competent ore, resulting in lower grinding circuit throughputs and better copper and gold recoveries in flotation. The flow sheet selection was typical of a large copper concentrator except for the inclusion of a third stage of cleaning and the use of sand mill based regrind. The flow sheet is ...
excellent copper recoveries up to % into high grade copper concentrates (up to % Cu).'' and ''Cu/Ag concentrates are low in impurities and generally well below smelter penalty levels.'' and ''low Bond Ball Mill Work Indices suggest low power requirements for grinding ore.'' and ''They indicate it
Both copper and gold values in the ore were readily recoverable by froth flotation ( 07o copper rougher recovery and *^ gold rougher recovery). However, the high concentrate weight (2607o) and low concentrate grade ( Cu and g/t Au) indicate that extensive cleaning with regrinding would be required to produce a
a nominal 80 000 tpd of porphyry gold/copper ore. It is located in ... SAG and primary ball mill grinding circuits, rougher flotation, ball mill regrinding, gravity recovery ... primary grinding ...
Jul 17, 1984· A sequential flotation process for the recovery of highgrade concentrates of copper, lead and cobaltnickel 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.
the rougher stage in comparison to the rougher stage of a copper concentrator mill (santos, Gonçalves and Andrade, 2003). ... for an ore type, copper grade and feed rate different from those that ... the primary grinding was done in a cylindrical rod mill ( × ...
Even though these minerals occur in relatively small amounts they can often be economically recovered as byproducts for the expense of mining, crushing, and grinding is absorbed in recovery of the copper. A Copper Flotation Flowsheet Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper ...
Copper production About 80 % of primary copper production comes from lowgrade or poor sulfide ores. After enrichment steps, the copper concentrates are usually treated by pyrometallurgical methods. Generally, copper extraction follows the sequence (see Figure below): 1. Beneficiation by froth flotation of ore to give copper concentrate
In the flotation of copper ores several processing plants report that copper recovery is affected by the proportion and type of pyrite in the ore, with the effect becoming more intense when the feed ore particles are fine, in fine regrinding. In this work, a model
Effect of pyrite content of feed and configuration of locked particles on rougher flotation of copper in low and high pyritic ore types ... comes from an elevatedpyritic copper ore. In this ...
82% Au by 6stage rougher flotation. Although finer grinding improved the copper recovery, primary grinding to a 80% passing size (P80) of 150μm was the indied optimum target with regarding the energy consumption in the comminution processes. The tests reveal that .
Copper/Molybdenum Ore. The figure above is a simplified flow sheet showing the basic steps involved in a copper mill producing the byproduct molybdenum. The crushed copper ore (containing, for example, % Cu and % Mo) is fed to the grinding circuit where water is added and the ore is .
The present work deals with the results of investigations carried out at different stages in the grinding and flotation circuits of a plant, treating a low grade copper ore. Conventional and autogenous grinding methods are compared, to evaluate the effects of different grinding environments and consequently the pulp chemical conditions.
Copper Ore Grinding. Porphyry copper ores usually are medium to medium hard and require grinding to about 65 mesh to economically liberate the copper minerals from the siliceous gangue. Sometimes a regrinding circuit is advantageous on the rougher concentrate and on the scavenger concentrate.
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Estimated Water Requirements for the Conventional Flotation of Copper Ores . By Donald I. Bleiwas . Introduction . 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
Hence, leaching did not improve the comminution properties of the ore. In terms of copper recovery, the flotation response of the chalcopyrite ore was also not affected by atmospheric leaching. This is apparent from the plots in Fig. 12, which compares copper recovery in rougher flotation for the ore .
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