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Autoclave leaching copper

  • Autoclave Leaching of Copper Nickel MatteInfluence of Pressure, Temperature, and Lixiviant Composition The initial tests were conducted with finely ground matte II and 100 g/l H2SO4 made from reagentgrade su

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pressure leaching of decopperized coppersecondary autoclave leaching was performed in a strong acid medium with oxygen purging in order to dissolve residual copper, nickel and bismuth as well as other elements in a controlled way. leaching tests showed that cu, ni, bi, as, te and se were partially dissolved during the secondary autoclave leaching.copper ore hydrometallurgy and pressure leachingcoppercopper hydrometallurgy is a branch of metallurgy method to extract copper directly from those difficulttoconcentrate copper oxide ore. traditional copper hydrometallurgy process typically consists of atmospheric leaching, solvent extraction (sx) and electrowinning (ew). it can produce either copper cathode or copper sulphate crystal.autoclave leaching of copper nickel matteinfluence of pressure, temperature, and lixiviant composition the initial tests were conducted with finely ground matte ii and 100 g/l h5so4 made from reagentgrade sulfuric acid. the results in tests (table 2) indicated that 95 pct of the iron and nickel were extracted when the autoclave was heated to 0° c and pressurized with air to 250 psagitator speed and leaching time studieseffect of airflowextraction dependence on particle sizegas composition influence on extractionleaching behaviour of matte residuesummarythe influence of the agitator speed was investigated at 0° c with a spent copper electrolyte containing 40 g/l h5so4 because at these conditions, incomplete extraction was expected at 1,700 rpm. however, at 1,300 and 1,700 rpm, over 95 pct of the copper and nickel (tests ) was extracted, but only 88 and 93 pct of the copper and nickel, respectively, were extracted at 700 rpm (test 10). at 100 rpm (test 9), the copper extraction further decreased to 24 pct but the iron extraction increased. the extraction dependuniversity of nevadaautoclave pressure leach system. copper(ii) proved to be the most effective catalyst for the thiosulfate pressure leach process, on the battle mountain ore, with extractions averaging around 80%, compared to cobalt(ll), manganese(ii), vanadium(iv) and iron(h iii) which yielded g values between and 35%.cu leaching using regenerated ferric sulphateies, regenerated ferric sulphate leach processes were proposed for copper sulphide minerals and for zinc sulphide minerals, whereby so. 2 /o. 2. mixtures were used to regenerate ferric sulphate, either insitu (during the leach) or exsitu (in a separate reactor). initial results have been presented for copper and zinc sulphide minerals (,).leaching of copper sulphides saimmrequired in the leach. the autoclave oxidation step provides virtually all acid and ferric sulphate required for the copper leaching process (dreisinger, 06). leach reactors are operated at atmospheric pressure near the boiling point of the slurry. the leachfile size 274kb

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Advantages of autoclave leaching copper

oxidation sulfuric acid autoclave leaching of coppermar , · up to10%cash back· autoclave leaching of cake after atmospheric leaching of fine dust makes it possible to break down copper and zinc sulfides and ferrites at 0°c, h 2 so 4 / (pb + zn + cu) = 2.1, {p}_ { {\mathrm {o}}_2} = 0.3 mpa, τ = 2 h. the overall extraction achieved into solution for the atmospheric and autoclave stages is 93% cu, 96% zn, and 99% cd.cited by 8hydrometallurgy leaching. leaching involves the use of aqueous solutions to extract metal from metal bearing materials which is brought into contact with a material containing a valuable metal. the first examples come from th century germany and spain where it was applied to extraction of copper. the lixiviant solution conditions vary in terms of ph, oxidationreduction potential, presence of chelatinga novel process for recovery of te and se from copperin pressure oxidation leaching of copper anode slimes, more than 65% of the tellurium is coextracted during decopperizing. about 10 % of the selenium is also dissolved imultaneously by severe leach conditions. current operation for the treatment of the leachate is to constantly recirculate the leach solution through a bed of copper turnings.leaching of a copper flotation concentrate with ammoniumthe leaching behavior of a copper flotation concentrate was investigated using ammonium persulfate (aps) in an autoclave system. the decomposition products of aps, active oxygen, and acidic medium were used to extract metals from the concentrate. leaching experiments were performed to compare the availability of aps as an oxidizing agent for leaching of the concentrate under atmosphericpressure leaching of copper concentrates2 october 25th, 04 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 commercialization leaching of polymetallic cuznpb concentrate withaug , · atmospheric ferric leach for copper fro m chalcocite. pper sulfide ores by autoclave leaching followed by . extraction and elect trowinning, australian patent. 749257, 02.pressure leaching rpmglobalsunshine mine process plant at kellogg, idaho (80), but copper concentrate leaching was advanced to larger scales with the commissioning of the bagdad, arizona, concentrate leach plant (03) and then the morenci, arizona, concentrate leach plant (06). copper concentrate leaching has been driven by two principal opportunities

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The case of autoclave leaching copper

us52709a method of tellurium separation from coppera method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 0 psi and at an elevated temperature between about 100° and 0° c. until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting thecesl publication copper pyrite leaching behaviour understandard batch leach tests were performed in a 2 l, titanium body parr autoclave using 30 g/l of the ground pyrite and 1.1 l of a feed solution assaying g/l cu, g/l cland zero acid. the procedure involved charging the autoclave with the appropriate materials, clamping the head of the autoclave including internals ontothe investigation of hightemperature autoclave leachingduring autoclave leaching 96,8398,% copper recovery was achieved with residual content of copper in the cake 0,280,81% and the recovery of zinc 98,8399,52% with residual content of zinc in the cake 0,0,48%.perumin 31 the hydrometallurgical treatment of copperpressure leach pilot plant 30 l titanium autoclave hazen research marsden et al 36. marsden et al copper extraction and sulfide oxidation from pilot plant compartment samples 37. process design criteria parameter value copper extraction in pressure leaching 99.0% overall copper recovery 98.0% operating temperature 225 c (235 c max.)hydrometallurgical considerations in processing arsenicrecovery from leach residue, arsenic capture to residue within the leaching vessel, and, particularly, stability of the final residue. optimal copper extraction results exceeded 98% in bench work with parallel pilot results achieving >97% copper recovery to lme grade a

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