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Jan 01, 1997· A study of the recovery of copper, cobalt, nickel and zinc from copper converter slag by roasting with ferric sulphate is reported. Roasting of converter slag with ferric sulphate, followed by leaching with water, was carried out in order to bring the metal values into solution.
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Temperature ranges of sulphatizing roasting and necessary amounts of Fe2(SO4)3 and FeSO4 for sulphation of zinc and copper were calculated by thermodynamic software HSC Chemistry 9.9.
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Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done by giving the sulphide ore an oxidizing-sulphatizing roast.
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Mar 30, 2013· Feed = Concentrate A Roasting air 32 000°C at 50°C Nm3/h . PALPERI, M. and AALTONEN, O. Sulphatizing roasting and leaching of cobalt ores at Outokumpu Oy.
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Outotec built it first sulphatizing roaster in Zambia about 30 years ago. At that time, the roasting of metal sulphides was already one of the main technologies in the company. Outotec has...
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The principal ore of copper is copper pyrite and copper is extracted from this ore. The different steps in extraction of copper are: Crushing and Concentration: The ore obtained from mines are broken down into small piece by jaw crusher and then pulverized. The ore being sulphide ore is concentrated by froth floatation process.
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Abstract Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done by giving the sulphide ore an oxidizing-sulphatizing roast.
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Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the sulphide into the oxide form. This can be done
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Jul 26, 2013· Sinter Roasting OR Blast Roasting • Fine ore & concentrate have been agglomerated before charging • Use for Sulphides ore • Charge = (fine ore+ moisture) as layer of 15-50 cm thick on revolving belt • Combustion is done by burner • Speed is adjusted - roasting should be completed before it discharge • Produce porous cinder called sinter • Cooled sinter is sized ti give uniform product
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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 .
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Gold ore roasters that treat the whole ore instead of a concentrate are endothermic owing to the low sulphur contents of 2-5 per cent. Conventional sulphatizing roasting. Feedstock examples are shown in Table I. Concentrate A is typical for most realized projects so far. The copper content is usually less than the sulphur content.
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Jul 26, 2013· Sulphatizing Roasting - Sulphide sulphates prior to leaching Magnetic Roasting - Controlled reduction of hematite (Fe2O3 ) magnetite (Fe3O4) Reduction Roasting - Partial reduction of an oxide ore prior to actual reduction smelting Blast Roasting or Sinter Roasting - Partial oxidized as well as physical conditioned ore is charge. 4. Roasting ...
view moreof copper slag flotation tailings of JSC "SUMZ" (Sredneuralsk Copper Smelter) with high content of silica. Temperature ranges of sulphatizing roasting and necessary amounts of Fe 2 (SO 4) 3 and FeSO 4 for sulphation of zinc and copper were calculated by thermodynamic software HSC Chemistry 9.9.
view moreJan 01, 1997· A study of the recovery of copper, cobalt, nickel and zinc from copper converter slag by roasting with ferric sulphate is reported. Roasting of converter slag with ferric sulphate, followed by leaching with water, was carried out in order to bring the metal values into solution.
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lecture discusses roasting. Roasting Roasting is the oxidation of metal sulphides to give metal oxides and sulphur dioxide. Typical examples are: 2 ZnS E3 O 6. L2 ZnO E2 SO 6 eS 6. 5.5 O 6. Fe 6. O 7. 4 SO 6 2 PbS E3 O 6. L2 PbO E2 SO 6 7. ZnO.Fe 6. O 7. Typically,sulphide ores of copper, zinc and lead are roasted either partially or completely ...
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Jan 01, 1990· Sulphation roasting of primary and secondary copper slags has been carried out to facilitate the dissolution of copper, nickel, cobalt, zinc and iron. The process comprised preroasting of the ground slag followed by roasting with pyrite and then leaching with water.
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Gold concentrate roasting, most commonly known as dead roasting, uses Outotec's circulating fluidized bed technology. When using a dead roasting process for concentrates, the sulfides are completely transformed into oxides. The gas temperature in this type of plant is typically between 600 and 700°C.
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Metallurgical ContentRecover Gold by Roasting Pyrite OreRoasting of flotation concentratesRoasting Arsenopyrite Ore for GoldRoasting and leaching a sulphide concentrateRoasting and Processing Sulpho-telluride ore to recover goldFluoSolids Roasting SystemRoasting with a FluoSolids reactorWhy use Salts in the roasting processROASTING WITH SODA ASHGOLD LOSSES IN ROASTINGCalcination & Roasting ...
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The content of residual S in the copper slag was determined by the combustion neutralization method [], and the sulfur release rate (n) was calculated as the following formula: where M 1 and M 2 are the masses of samples before and after roasting, respectively, g and S 1 is the initial sulfur content of the copper tailings, while S 2 represents the residual sulfur content of the roasted slag, %.
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Sulphatizing Roasting - Sulphide ores to sulphates prior to leaching. Magnetic Roasting - Controlled reduction of hematite (Fe2O3 ) magnetite (Fe3O4) Reduction Roasting - Partial reduction of an oxide ore prior to actual reduction smelting. Blast Roasting or Sinter Roasting - Partial oxidization as well as physical condition ore is changed.
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A method for recovering copper and/or other non-ferrous metals from sulphidic raw material by roasting the material to a substantially sulphur-free state and then in a separate furnace sulphatize the roasted material into a form of a readily soluble sulphate and/or basic sulphate and then leaching the sulphatized material with an aqueous sulphuric acid solution.
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The kinetics of sulphatizing roasting of cobalt sulfide using sulphuric acid as acidifier was studied. The influence of temperature andparticle size on extraction of cobalt was investigated. The results show that the sulphatizing roasting rate is controlled by diffusion through solid layers.
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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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