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The results show that the optimum sulphation roasting temperature range is 600 700 °C The leach extraction efficiencies of Ni Co and Cu exceeded 60% when about 10 wt% sodium sulphate was added during roasting The role of sodium sulphate as a sulphation promoter is attributed to an intermediate phase that acts as a reservoir of SO 2 Keywords
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Results of roasting of cupric sulphide with and without additive 10% Fe 3 O 3 at different temperatures for 60 min duration at an oxygen flow of l/s are depicted in Fig 3 At 573 K the maximum yield of % copper sulphate was obtained without ferric oxide whereas it was % with 10% Fe 2 O 3 up to a temperature of 623 K
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Pre existing iron sulphates decompose to haematite while a substantial decomposition of copper sulphates starts only at 700°C At 680°C 93 per cent of the copper exists as sulphate while at 720°C this proportion drops below 50 per cent Cobalt is less sensitive Even at 720°C more than 90 per cent remains in the sulphate form
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These are heated by combusted fuel or electric current to a temperature of 1 230 1 300 °C 2 250 2 370 °F producing an artificial copper iron sulfide that settles in a molten pool at the bottom of the furnace The sulfide material known as matte contains from 45 to 70 percent copper depending on the particular process
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secondary copper smelting dust sulphating roasting halogen removal heavy metal recovery phase transformation 2 Engineering Unsaturated Sulfur Site in Three Dimension Mos2 Rgo Nanohybrids with Expanded Interlayer Spacing and Disordered Structure for Gaseous Elemental Mercury Trap
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Sulphating roasting is a unit operation in the production process for copper and cobalt from sulphidic ores The simplified block diagram in Figure 1 shows that roasting is the first stage in the process flow sheet The objective of roasting is a selective sulphation of copper and cobalt while ferrous minerals and components are oxidized to
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Sulphating roasting of copper cobalt SAIMM Extraction of copper and cobalt is carried out by solvent extraction with subsequent electrowinning SX EW The roasting off gas is used for sulphuric acid production This production process has been in operation for several decades It is partic ularly suitable for cobalt containing copper ores
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Sulphating roasting a new way to solubilize uranium in refractory minerals In Proceedings International Atomic Energy Agency IAEA SM 135/10 Asmund G Lundgaard T Sørensen Emil / Sulphating roasting a new way to solubilize uranium in refractory minerals Proceedings International Atomic Energy Agency 1970
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Our 2 year old husky Copper we love him to death but he keeps stealing food from the counters even a whole dang roast last night😂😂😭
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In late 2024 Hatch was awarded a contract to supply fluid bed technology for the Katanga Mining Limited KML copper cobalt processing project in Congo DRC
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Sulfating roasting is generally used for processing copperconcentrates in combination with electrowinning The copper sulfide is transformed into water soluble copper sulfate and the iron sulfide into insoluble iron oxide Standard sulfating roasters run with a slurry feed and do not require a waste heat boiler system in the off gas stream
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Roasting is a process of heating a sulfide ore to a high temperature in the presence of air It is a step in the processing of certain specifically roasting is often a metallurgical process involving gas solid reactions at elevated temperatures with the goal of purifying the metal component s Often before roasting the ore has already been partially purified by froth
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Heating a mixture of roasted 70 80% desulfurization sulfide copper ore with nickeliferrous saprolite ore calcium oxide and carbon in a weight ratio of 60 100 10 provides matte wt % Ni wt % Cu wt % Co g/ton Au and g/ton Ag concentrating % nickel % copper % cobalt and up to % of precious metals
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Sulphate roasting was applied on a laboratory and small pilot plant scale to a copper zinc sulphide concentrate After sulphate roasting in open hearth or fluidized bed furnaces the calcine was leached in mild sulphuric acid solutions Recoveries of 99% and 95% were achieved for copper and zinc respectively with little iron contamination
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It was also observed that the mixture of copper iron sulphides yielded a higher amount of copper sulphate % than that obtained % from copper sulphide alone in the presence of
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This analysis allows the estimation of the degree of solubility of copper rich minerals in sulfuric acid and cyanide The sulfuric acid leaching enables the dissolution of soluble copper oxides The copper contained in the secondary sulfides and bornite was dissolved using a cyanide solution CNsCu
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In the case of roasting of sulfide ore done in metallurgy of copper Due to partial roasting the copper sulfide becomes copper oxide which further reacts with unreacted copper sulfide and gives auto reduction The reaction is shown below 2 C u 2 S 3 O 2 → 2 C u 2 O S O 2 2 C u 2 O C u 2 S → 6 C u S O 2 So the correct option is A
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Sulphating is a derived term of sulfate As verbs the difference between sulphating and sulfate is that sulphating is while sulfate is chemistry to treat something with sulfuric acid a sulfate or with sulfur dioxide As a noun sulfate is organic chemistry any ester of sulfuric acid
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Sulphating roasting of copper cobalt concentrates Author s Guentner J Hammerschmidt J Year 2024 Volume 112 Issue 6 Page Numbers 455 460 Web of Science Id WOS Outotec has developed roasting solutions for copper gold zinc lead molybdenum and pyrite ores The continuously expanded and upgraded research facilities provide an
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The process is particularly useful in separating copper and zinc from sulphide ores of those metals in particular when the ore has been subjected to a dead roast or to a sulphation roastand the roasted ore contains then metal ferrites which otherwise require high acid concentrations and high leach temperatures for metal recovery therefrom
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Cu Co Sulphating roasting of copper J o u r n a l P a p e r Introduction Sulphating roasting is a unit operation in the production process for copper and cobalt from sulphidic ores The simplified block diagram in Figure 1 shows that roasting is the first stage in the process flow sheet The objective of roasting is a
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fSulphating roasting of copper cobalt concentrates Slurry feeding Air Calcine Off gas 720C this proportion drops below 50 per cent Cobalt is less sensitive Even at 720C more than 90 per cent remains in the sulphate form More than 95 per cent of the iron sulphates are decomposed at 680C
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The Old Copper Complex in North America has been radiometrically dated to 9500 BP— about 7480 BCE—making it one of the oldest known examples of copper extraction in the world The earliest evidence of cold hammering of native copper comes from the excavation at Çayönü Tepesi in eastern Anatolia which dates between 7200 to 6600 BCE Among the various items considered to be votive
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At 680°C 93 per cent of the copper exists as sulphate while at 720°C this proportion drops below 50 per cent Cobalt is less sensitive Even at 720°C more than 90 per cent remains in the sulphate form More than 95 per cent of the iron sulphates are decomposed at 680°C
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A method of recovering copper and nickel from sulphidic minerals containing copper nickel and iron comprises the steps of roasting the mineral preferably to provide magnetite sulphating for example with sulphuric acid sulphur trioxide metal sulphate and/or sulphur dioxide together with oxygen and a subsequent leaching of the sulphated material and recovery of copper from the leaching
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Process for the sulphating roasting of zinc containing ores mining or the like Info furnace roasting gases oxygen Prior art date 1949 07 19 Legal status The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed Expired
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for copper sulphides Three copper sulphide leaching and refining processes are discussed total pressure oxidation ferric sulphate leaching and copper chloride leaching Ferric sulphate leaching and copper chloride leaching are carried out at atmospheric pressure while total pressure oxidation takes place at elevated pressures
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May 23 2022Sulphating roasting of copper cobalt concentrates J South Afr Inst Min Metall 112 455 460 in English Vlasov O A Mechev V V Method of processing pyrite stubs Patent 2394924 RU Publ 20 07 10 Litvinenko L G Litvinenko V G Shchelkonogov M A Morozov A A Method of complex processing of pyrite stubs
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