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This paper describes investigations to increase the flotation recovery of copper from ores containing both primary and secondary copper minerals. An increase in the flotation recovery of copper is obtained by conducting controlled potential …
Plant survey of bulk and copper selective flotation circuits was realised by collecting representative samples from purposely determined points. The obtained samples were subsequently split for chemical ... while nitrogen was continuously purged throughout. The slurry was then filtered through a 0.45 µm Millipore filter. Atomic adsorption ...
Separation of chalcopyrite from molybdenite is currently mainly carried out by flotation, but this process is costly because of the extensive use of inhibitors. This study briefly describes a 7.0T/100CGC low-temperature superconducting magnetic separator and discusses its separation principle as well as the effect of magnetic induction on …
The global market has announced copper as a modern energy metal and finds its extensive utilization in the construction industry, electrical wiring, power transmission lines, alloying, anticorrosive coating, heat exchangers, refrigeration tubing, etc. Copper ore is primarily beneficiated from sulphide mineral deposits. Due to high-grade …
Sodium hydrogen sulfide (NaHS) is commonly used as a copper depressant in the selective flotation of copper and molybdenum ores. However, the process is facing health and safety issues because NaHS readily yields toxic hydrogen sulfide gas (H2S) under acidic conditions. In this study, Na2SO3 was proposed as an alternative copper …
Flotation Reagents. mixtures of chemicals, commonly known as reagents, is presented for the purpose of acquainting those interested in froth flotation with some of the more common reagents and their various uses. Flotation as a concentration process has been extensively used for a number of years. However, little is known of it as an exact ...
The flotation separation of enargite from copper sulfide minerals is difficult owing to the similar floatability and reagent adsorption characteristics of these minerals. In this study, the effect of oxidation treatment using NaClO flow with FeCl3 on the flotation separation of covellite and enargite was systematically investigated. Micro-flotation tests …
Studies on the flotation of copper-bearing minerals have shown that nitrile-based collectors were selectively adsorbed on chalcopyrite and could therefore be used as a primary or a supplementary ...
and chemicals that facilitate flotation. Compressed air and the flotation chemicals separate the ground slag into various fractions of minerals. Additives cause the copper to float in a of air bubbles for subsequent removal, dewatering, and concentration. Leaching is used to recover copper from slime, a byproduct of electrolytic refining ...
Furthermore, other actions, such as applying nitrogen [72] as a flotation gas and creating a reductive pulp potential through an electrolysis [51] method were reported to be helpful for depressing copper sulfide flotation in plant or lab scale tests.
The flotation chemistry is more complex due to the need to depress the majority of copper minerals in the bulk concentrate feed. This paper will mainly focus on the byproduct molybdenum circuit. In a typical byproduct molybdenum plant, the feed is the bulk concentrate generated from the copper flotation circuits.
expected to be more effective for bulk sulfide mineral flotation. One of the objectives of this paper was to examine the fundamental aspects of thiocarbonate flotation of pyrite, with both air and nitrogen, as revealed from electrochemically controlled contact angle measurements and from infrared surface spectroscopy.
Jeldres et al., 2019 reviewed the negative effects caused by different clay minerals in the flotation of copper ores. They found that in the presence of fine clay minerals, their pulps tend to behave as a non-Newtonian fluid, and properties such as viscosity and yield stress begin to have a dominant role in the hydrodynamics of the …
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 …
Copper oxide minerals are important copper resources, which include malachite, azurite, chrysocolla, cuprite, etc. Flotation is the most widely used method for the enrichment of copper oxide minerals in the mineral processing industry. In this paper, the surface properties of copper oxide minerals and their effects on the mineral flotation ...
DISCUSSION An important finding from these investigations is the significant influence of nitrogen in the selective flotation of minerals from pyritic ores. Specifically, nitrogen used instead of air affects the …
Pulp potential after the addition of Na 2 S dosage with different flotation gas (air and nitrogen), (b) pulp ORP change with the addition of Na 2 S [72]. ... An investigation of the factors affecting the recovery of molybdenite in the Kennecott Utah Copper bulk flotation circuit. Miner Eng, 21 (2008), pp. 832-840, 10.1016/j.mineng.2008.03.003.
and/or thermal treatment to depress copper sulfide minerals. The bulk copper/molybdenum feed generally varies from 0.2% Mo to l.Oo/o Mo, and with traditional reagents the single-stage rougher flotation recovery of molybdenite varies between 40% and 90% at a concentrate grade of5o/o to 10% Mo. With ozone conditioning for copper depression, …
Nitrogen was proposed as the flotation gas in stages 1 and 2; potential changes can be made through aeration where possible, but some chemical additions may be required. ... The bulk copper–arsenic product from stage 2 has low volume, so pulp potential should be easier to control in the subsequent stages (Smith and Bruckard, 2007).
1. Introduction. Chalcopyrite (CuFeS 2) is one of the primary copper sulphide minerals and it accounts for 70–80% of the global copper (Cu) reserves (Baba et al., 2012, Nyembwe et al., 2019, Schlesinger et al., 2011).Froth flotation is usually applied to concentrate copper ores and separate copper minerals from the gangue. Currently, …
A triple-bonded carbon-nitrogen ... with a sized fraction of concentrates and tails obtained by flotation of a copper sulfide ore (Northparkes Mine, Australia) in a mechanically agitated batch ...
In this paper, the flotation behaviour of nickel-copper ores processed in the Sudbury area is discusse~ with emphasis on the effect of oxidation on individual minerals, pnmarily pyrrhOlite. In general, moderate oxidation of a freshly ground ore promotes the flotability of all principal sulphides in the ore leading to a bulk flotation concentrate.
All reagents were analytically pure. The selected collector was added at different concentrations and conditioned during 5 min, at pH around 6.5. The frother was then conditioned for 1 min, before the air or nitrogen (as flotation gas) being introduced in the pulp. The flotation was carried out for 6 min with a gas flow rate of 3.6 l/min.
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 ...
Figure 9 (a) Recovery of copper (as chalcopyrite) and molybdenum (as molybdenite) as a function of potential (vs SHE) on hydrogen scale [22], and (b) The effect of NaHS addition on the flotation ...
flotation of molybdenite from the bulk copper–molyb-. The use of nitrogen in this case is mainly to reduce the denite concentrate of the Sarcheshmeh copper complex. oxidation of a polysulphide compound (Nokes reagent) used as a depressant for chalcopyrite. From processing viewpoint nitrogen has two effects 3.
sulfide flotation; whilst notable success has been reported in the copper industry, the potential value of these in the PGM industry has not yet been evaluated. This study employed batch rougher flotation tests coupled with mineralogical analysis of tailings samples to investigate the application of Tecflote