Nioshtic-2 publications search-10009018-leach
Testing established that the high clay and gypsum content of typical ore prevented effective flotation of the oxide mineral using sulfidizing, fatty-acid, or oil emulsion techniques. a modified leach-precipitation-flotation (l-p-f) procedure recovered over 90 percent of the copper, compared to a recovery of 77 percent obtained by conventional
jun 15, 2018 to achieve an excellent copper dissolution from the concentrate of flotation tailings, which consist of chalcopyrite as the major copper component, high‒pressure leaching (hpl) was conducted using an autoclave under a variety of sulfuric acid concentration (0–0.5 m), total pressure (0.8‒2.0 mpa), temperature (140‒180 c) and pulp density (100‒400 g/l).
the smelter for sulfide ores produces sulfur dioxide gas. this is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. scrubbing sulfur dioxide also protects the environment. a by-product of the smelting and converting furnaces is sulfuric acid. in what looks like a lucky coincidence, sulfuric acid is needed
prejudicial for flotation if they precipitate on the surface of the copper minerals because they are not collectable with xanthates (woods, 2003). the traditional method applied for the flotation of copper oxide or mixed ores is sulphidization, which was first developed with industrial success on pb–zn oxide ores in review, evolution, and optimization of the treatment of kansanshi mixed copper ore
V116n6a11 review, evolution, and optimization of the
Leaching of low-grade copper ores: a case
Oxide copper ore, mixed oxide-sulphide ores and low-grade copper sulphide ore, which, for economic reasons, cannot be enriched by flotation, may be processed by leaching methods. agents for leaching copper can be acid, base, or salt solutions. of all of these agents, sulphuric acid has been given the
apr 14, 2016 copper agitated leaching and cementation process of copper problem: the treatment of copper ores, both oxides and sulfides by means of flotation, hydrometallurgy or other processes has been well established for many years. flotation has been applied generally to the treatment of sulfide ores, both in small and large scale operations.
apr 01, 2020 an interesting process to treat mixed copper sulfides-oxide is the leaching-precipitation-flotation (lpf) sequence. the treatment begins with an acid leaching amidst a ph 1–2, followed by precipitation at ph 3–3.5, which is fixed with lime to avoid unnecessary iron consumption.
chemical beneficiation of copper oxide ore acid leaching—precipitation—flotation. scope of application: malachite, cuprite, tenorite, copper mine tailings, etc., except copper ore containing calcium magnesium carbonate gangue. the ore is first leached with a 0.5% to 3% sulfuric acid dilute solution after being ground.
How to process copper ore: beneficiation methods and
applicable copper ores: copper sulfide ores, such as chalcopyrite, bornite and chalcocite, as well as common copper oxide ores, such as azurite, etc. five common flotation methods: sulphidizing flotation, fatty acid flotation, amine flotation, emulsion flotation and chelating agent—neutral oil flotation. flotation is the main method of copper
Us6726889b2-production of zinc oxide from acid soluble
The present invention relates to an apparatus and a process for producing zinc oxide from an acid soluble zinc-bearing material. the process according to the present invention comprises the steps of leaching the zinc oxide material with sulphuric acid; precipitating iron and silica from the leach solution using calcium oxide; removing copper, cadmium and cobalt from the leach solution by
response surface methodology is used to optimize the leaching process for refractory flotation copper tailings. the proportion of the refractory combination oxide copper (chrysocolla) is 64.84%. at present, few studies have examined the leaching of chrysocolla. in this study, we examine the effects of several variables, including the amount of concentrated sulfuric acid, leaching temperature
apr 18, 2018 copper oxide is more difﬁcult to recover than copper sulﬁde. presently, the three main treatment methods of copper oxide are ﬂotation [2,3], leaching , and beneﬁciation-metallurgy combination processes . the ﬂotation method can be divided into the two following types: direct ﬂotation and sulﬁdation–xanthate ﬂotation.
sep 03, 2020 abstract in the present work, the leaching behavior of copper from an oxide/sulfide ore was assessed in two work phases including process optimization and kinetics modeling. in the first phase, the individual and synergistic impacts of the influential parameters such as sulfuric acid concentration, liquid/solid ratio, pulp mixing rate, temperature, and contact time were investigated on
Experimental and kinetic modeling investigation of copper
aug 03, 2021 although ammonia leaching avoids some of shortcomings of acid leaching, it is accompanied by problems such as higher cost, low leaching efficiency and environmental pollution. therefore, for copper oxide ore recovery, the most common and effective technique is sulfurization flotation . since the 1960s, it has been generally considered that the
The leaching and adsorption behaviour of gold ores
4.4 the effect of copper cyanide on gold leaching from oxide and sulphide ores 110 4.5 summary 114 chapters preg-robbing phenomena in the cyanidation of gold ores 116 5.1 objectives of this chapter 116 5.2 background information 116 5.3 preg-robbing behaviour by the ores
jun 15, 2018 a new flotation tailings treatment process was developed for efficient cu recovery. • an efficient cu dissolution was achieved in an h 2 o media in presence of pyrite.. the dissolution mechanism of cufes 2 has been confirmed to be a multistage reaction.. fe was always co-dissolved with cu following a linear relation of c fe = 38.393 c cu.. over 91% cu was extracted from pregnant leach
treatment of low grade acidic waste solutions, multi-metal leach solutions and gold cyanidation solutions (8). it has also been used in the leach-precipitation-float process for treating mixed copper oxide/sulphide ores. advantages include small footprint suitable for mountainous site s, low power consumption and low capex. the
prejudicial for flotation if they precipitate on the surface of the copper minerals because they are not collectable with xanthates (woods, 2003). the traditional method applied for the flotation of copper oxide or mixed ores is sulphidization, which was first developed with industrial success on pb–zn oxide ores in review, evolution, and
V116n6a11 review, evolution, and optimization of the
followed by acid leaching of the oxides. the traditional method applied for the flotation of copper oxide or mixed ores is sulphidization, which was first developed with industrial success on pb-zn oxide ores in australia (crozier, 1991). the method involves multistage addition of sodium sulphide (na2s), sodium hydrosulphide (nahs), or ammonium
Us3403020a-leaching of copper from ores with cyanide
Us3403020a us418324a us41832464a us3403020a us 3403020 a us3403020 a us 3403020a us 418324 a us418324 a us 418324a us 41832464 a us41832464 a us 41832464a us 3403020 a us3403020 a us 3403020a authority us united states prior art keywords copper cyanide ore hcn recovery prior art date 1964-12-14 legal status (the legal status is an assumption and is not a legal
a metallurgical process for treatment of the ore. the ore is dominated by clay (typically 40- 50% montmorillonite clay). the presence of clay controls the pulp rheology and settling and filtration properties for the ore. there is also some carbonate mineralization in the ore which has a major impact on acid consumption during whole-ore leaching.
Metallurgical development of the el boleo copper
jan 15, 2021 the optimum alkaline leaching conditions of 5% naoh, temperature 90 to 95 c in 90 min was obtained for leaching zinc from an oxide ore 17. the column leaching of low grade zinc oxide ore
Five flotation methods, help you processing lead-zinc
Aug 23, 2021 sulfide-ammonium salt flotation method. this method is also one of the main methods for flotation of lead-zinc oxide ore. its principle is similar to the sulfide-xanthate flotation method. after surface vulcanization of lead-zinc oxide ore, amine collectors are used to flotate lead-zinc oxide. this method requires attention to the influence of
jan 15, 2021 the optimum alkaline leaching conditions of 5% naoh, temperature 90 to 95 c in 90 min was obtained for leaching zinc from an oxide ore 17. the column leaching of low grade zinc oxide ore containing 5.2% zinc using ammonium sulphate was carried out and 92.2% of zinc was dissolved 6.
aug 03, 2017 we compared the results of extraction of various metals from samples (leaching of ore and waste with sulfuric acid) for different concentrations of d2ehpa. the copper was recovered from leaching liquor approximately in 100% (table 2). the results of extraction of vanadium, molybdenum and uranium are shown in figs. 2, 3 and 4.
jul 17, 2013 orvana minerals corp. through its wholly-owned subsidiary, empresa minera paititi , advises that, due to certain factors and market conditions, it has suspended the operations of its leach
Orvana reports suspension of its leach-precipitation
a much quoted direct leaching method of late is the platsol process developed by lakefield research. this method involves high temperature leaching in sulphuric acid/sodium chloride under oxygen. comprehensive development work was carried out on a copper/nickel float concentrate from northmet containing pgm10, with