2021-3-29 · • Copper concentrates widely traded - The occurrence of arsenic in copper concentrates is a major target for effective treatment. • Why Hydrometallurgy • Hydrometallurgical technologies for arsenic fixation or extraction of metals from arsenical resources are effective. • First, hydrometallurgy avoids the high temperatures inherent in
2001-12-11 · 1. A method for leaching sulfidic, iron-bearing copper concentrate in a chloride milieu to obtain an essentially iron-free, alkali chloride-copper chloride solution, and recovering iron and elemental sulfur as a solid matter precipitate, the method comprising: leaching continuously and countercurrently in several stages, wherein each stage has at least one reactor, with bivalent copper and ...
2015-7-3 · Keywords: Autoclave leaching, flotation concentrate, recovery of copper and zinc 1 Introduction The aim of this work is the determination of the parameters of autoclave leaching of «Maykain B» flotation concentrate, at which the maximum extraction of copper and zinc in the solution can be achieved [1, 2].
2016-6-8 · worth noting, firstly the acid generated in the oxidation of the sulphides in the concentrate pressure leaching step and that produced in the extraction of copper from the pregnant leach solution (PLS) is available for use in a copper heap leaching unit process. In this way, an acid credit to the operating cost is derived (Dreisinger, 2006).
solution, conventional Cu SX/EW and recycling of the copper raffinate to the autoclave. The concentrate tested was a NorthMet bulk flotation concentrate assaying 14.7% Cu, 3.05% Ni, 0.14% Co, 26.7% S, 1.4 g/t Au, 2.2 g/t Pt and 9.9 g/t Pd. Laboratory results were …
2018-1-24 · The authors present the data on the substance analysis of gold–copper–arsenic flotation concentrate. Gold and copper recovery by autoclave leaching of the concentrate has been studied. It is found that maximum gold and copper recovery under optimum conditions reaches 96 and 92%, respectively. The profitability of the proposed process flowsheet is proved by the technical-and …
PDF | A chemical-mineralogical investigation of the behaviour of ore and rock-forming minerals of low grade nickel-bearing concentrates in sulphuric... | Find, read and cite all the research you ...
2016-9-14 · higher-copper-grade ore deposits containing arsenic. This requires costly cleaning, as arsenic is a health and safety risk for copper smelters with smelters limiting arsenic content to a maximum of 0.5% arsenic in the concentrate. The ALTA Short Course ''A-Z of Copper Ore Leaching'' includes hydromet processes for copper sulphide concentrates:
Every autoclave and preleach circuit is a custom design, based on the experience and expertise of the design team. With the right innovative and proprietary equipment designs, your pressure-oxidation needs can be effectively met. Our services are unique to your needs. We operate through the entire range of activities: feed-stock testing ...
2021-3-12 · :: New Copper Leach Technology Initiatives by Bateman Engineering. An update on the news item published February 12th.. Bateman Engineering has acquired the exclusive rights to two complementary, novel copper-leaching technologies with the potential to significantly enhance the company''s position in winning major copper processing projects globally.
: A finely-ground, highgrade nickel sulphide concentrate slurry is pumped into an - autoclave, at relatively low temperature and pressure, where oxygen injection is used to partially oxidise the sulphide concentrate into soluble metal sulphate species (nickel, cobalt, copper…
2019-6-28 · GEHO® Experience Autoclave feed GEHO® Heatbarrier pumps: proven track record up to 240°C GEHO® pumps have a long standing reputation for safety and reliability in autoclave feed in the minerals processing industry. The particularly high temperature and abrasiveness of some slurries, for example gold and nickel
A method of refining the "ordinary" (sweet) pyrrhotite concentrates containing up to 2.5% Nickel, not more than 0.5% copper and ~66-68% pyrrhotite, including autoclave oxidative leaching of the concentrate with the transfer of sulfur in elemental, non-ferrous metals in solution and iron oxides at temperatures above the melting point of ...
2020-8-20 · 2 October 25th, 2004 Presentation Outline Safety share Introduction Global copper reserves/resources Phelps Dodge production & reserves profile Commercial drivers for copper concentrate leaching The copper concentrate market and TC/RCs Phelps Dodge copper pressure leaching developments High temperature Medium temperature Critical success factors for …
Formed copper product is separated in autoclave from nickel, cobalt and iron with copper sulfate solution at elevated temperature and excessive water steam pressure to produce pulp used in isolating copper by common methods sulfide concentrate collecting platinum group metals and reversible copper-containing solution for atmospheric leaching of ...
2015-11-20 · followed by a bornite concentrate after successful start-up. PROCESS DESCRIPTION The CESL Process (Figure 1) involves oxidation of sulphide concentrates at elevated pressure and temperature in the presence of catalytic chloride ions. This is performed within an autoclave. The oxidized copper forms basic copper sulphate (BCS)
2017-8-21 · With CESL Cu-As Technology (operated at 150ºC), the precipitation of arsenic, while dissolving copper from concentrate feed, occurs under conditions that differ somewhat from the idealized studies referred to above. Instantaneous ferric and arsenic solution levels may be lower because leaching and precipitation occur simultaneously. Free acid is also perhaps lower because it is consumed in …
At present, arsenic content in copper concentrates is increasing, which leads to an increase in its content in all smelting products, the largest amount of arsenic is transferred in fine dust (dust composition,%: 10-12 Zn, 11-13 Pb, 8-15 Cu, 12-14 Fe, 5-10 As). Autoclaved leaching of dusts (temperature 160-200 °C, oxygen pressure 0.4-0.8 MPa, molar ratio H2SO4 /(Cu + Zn) = 0.75-2.25) to ...
2019-1-7 · into an autoclave (steam-pressured heating chamber) to increase the recovery of cobalt. Copper, nickel and cobalt are precipitated from the resulting solution using hydrogen sulphide. The copper sulphide is roasted to give an o xide concentrate, while the nickel-cobalt concentrate is …
2015-5-25 · an aqueous slurry of the sulphides concentrate in an air or enriched oxygen atmosphere in a pressure vessel (autoclave) at temperatures ranging from 120 to 230 0C. In the present work the experimental results on acid autoclave dissolution of the Ni-Co sulfide deposit was presented. The effect of …
2017-5-1 · Nevada production. Copper smelting and concentrate leaching are listed as alternative processing technologies. Autoclave leaching of concentrates is a lower capital cost alternative, which could increase the economic attractiveness of a copper concentrate processing facility.
after autoclave dissolving of the copper sulphide concentrate ... a sulphide copper concentrate (54.9 % Cu and 30.9 % S) and high degree (> 99 %) of Ni, Co, Fe and Mn …
2008-1-25 · The rights to the Galvanox technology — awarded by the University of British Columbia (UBC) – will enable Bateman Engineering to market this technology exclusively in about 20 countries. In addition, Oxiana Limited has granted the company exclusive rights to sublicense the leach process used at the award-winning Sepon copper project in Laos to other potential users in about 15 high ...
1995-10-1 · The effect of acid preleaching on the subsequent nickel and copper extractions achieved by autoclave oxidation is presented in Fig. 4. A short-term preleach (15-45 min) of the concentrate with a H2SO4 solution in the autoclave resulted in 95% nickel and 80% copper autoclave extraction within I h.
2021-1-21 · It would surprise most people, even those involved in the technology of copper mining, that many of today''s mining methods were introduced as early as 1865. In fact, if the originators of these technologies were to visit today''s operations, they would be surprised that their ideas are still used.
EP1346070B1 EP01271456A EP01271456A EP1346070B1 EP 1346070 B1 EP1346070 B1 EP 1346070B1 EP 01271456 A EP01271456 A EP 01271456A EP 01271456 A EP01271456 A EP 01271456A EP 1346070 B1 EP1346070 B1 EP 1346070B1 Authority EP European Patent Office Prior art keywords solid matter stage leaching reactor recycled Prior art date 2000-12-20 Legal status (The …
2013-7-29 · autoclave, hence reducing the required retention time by increasing the rate of autoclave chemical reactions (Western Minerals Technology, 2004). The extraction of Ni, Cu, and Co in solution is achieved through the oxidation of the sulphide within a five-compartment autoclave operating at temperatures of 105°C to 110 °C
2020-1-22 · oxidation of copper concentrates is shown below in Figure 3. Figure 3: General flowsheet of copper concentrate pressure oxidisation Conclusions Pressure leaching is not a new technology and indeed conventional with over 100 plants constructed and successfully operated over the previous 75 years. The process has proven
2009-10-15 · Autoclave The first stage leach residue typically contains nickel in the form of millerite, NiS, and polydymite, Ni 3 S 4, and copper in the form of the original Djurlite, Cu 1.96 S, and the precipitated digenite, Cu 1.8 S.These sulphides undergo total oxidation to the …
2015-11-20 · The effect of concentrate grind size feeding the autoclave was investigated during operations to determine if a finer grind would increase copper extraction. As shown in the following table, a finer grind had no measurable effect on copper extraction with concentrate A.
2020-1-15 · reduce impurities from copper sulphide concentrates while significantly upgrading the copper content. Chalcopyrite and bornite minerals are reacted with copper sulphate which displaces iron and produces chalcocite/digenite. Covellite also reacts to form chalcocite/digenite. The result is a copper in concentrate of 50-60% together with the gold.
2018-6-13 · outside the reaction chamber, a Teflon® liner with the reaction mixture was introduced into the autoclave. Table 1. The content of copper and accompanying metals in final flotation concentrate produced by the Lubin Concentrator from 2009 to 2015 Year Cu, % Zn, % Ni, g/Mg Co, g/Mg Ag, g/Mg Pb, % As, % C org, %