The oxidative roasting method (Hoffmann, 1989, Kanari et al., 2019, ... The copper anode slime leaching experiments were conducted in 250 mL round-bottom flasks. The reaction solution was prepared according to a certain ratio of H 2 SO 4, HCl and NaCl, and the copper anode slime is added to the reaction solution according to a certain …
The sulphide ore fed to the roasting plant is treated under sulphating roast conditions, followed by hydrometallurgical extraction. Equipment for the first roasting line has been installed and the plant commissioning completed. ... K. Adham et al., Design of Copper-Cobalt Sulphating Roasters for Katanga Mining Limited in D.R. Congo, …
case for sulphating roasting. Copper and cobalt recoveries are usually above 90 per cent. Adaptation to different feed materials The sulphur distribution between calcine and off-gas is determined mainly by the temperature, which in turn should be between 650 and 700 °C to promote formation of iron
Standard sulfating roasters run with a slurry feed and do not require a waste-heat boiler system in the off-gas stream. • Proven technology for cobalt and copper production. • Optimized for small and medium-size …
copper producers in the world. The sulphide ore fed to the roasting plant is treated under sulphating roast conditions, followed by hydrometallurgical extraction. Equipment for the first roasting line has been installed and the plant commissioning completed. Hatch's
Roasting the copper-containing residue under air and oxygen flow convert sulfides into sulfate, followed by water and acid leaching to extract copper. ... of sulphating roasting to perform a ...
At the optimum conditions set by the cobalt selective sulphating roast, for example at 700°C, the copper recovery as sulphate is not complete, and inevitably results in some sulphur dioxide release_ Figure 2 shows the copper-oxygen-sulphur equilibrium at 700°C, for different oxygen levels and sulphur dioxide partial pressures.
In the process of sulphating roasting, ... During the roasting process, copper-cobalt ore underwent the removal of free water successively; Removal of water of crystal; sulphide minerals oxidize to sulfate; the decomposition of sulfate into oxide; the reaction processes such as the formation of Spine phase by oxide reaction and the …
The ancient flotation tailings from Lefke, Cyprus, have a potential for non-ferrous metals such as cobalt and copper from more than 9.5 million tons of reserves containing 0.38% Cu, 0.032% Co, and ...
The present study focuses on the experimental investigation of sulphatizing roasting of flotation tailings from copper slag processing using iron (II) and (III) sulfates followed by water leaching. The effect of temperature, duration of sulphatizing roasting, as well as the amount of iron sulfates on the conversion of zinc, copper, iron and ...
In late 2006, Hatch was awarded a contract to supply fluid bed technology for the Katanga Mining Limited (KML) copper-cobalt processing project in D.R. Congo (DRC). The new roasting facility is part of the revitalization of an existing facility in the Katanga Province of the DRC being undertaken by ...
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 selective sulphation of copper and cobalt, while ferrous minerals and components are …
v112n06p455 Sulfating Roasting - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Roasting provides the possibility to transfer the valuable components into leachable compounds. Concentrates from recent projects on the Copperbelt have lower sulphur contents, and frequently higher copper contents, than those from older projects.
Leaching and cementation of the sulphating roasted low grade ergani copper ore 139 0.5 0.0 - 2.0 2,20 Slept • A-11 • 3.10 1/ I K iol ) • 3.50 Fig. 6. Arrhenius plot for cementation of copper with iron ( mixing device mild disc) Better results of cementation of copper for the leach solutions were obtained at lower concentrations of ...
Most copper/cobalt ores from the Central African Copperbelt contain sulphidic compounds, which are not extractable in direct leaching. Roasting provides the possibility to transfer the valuable components into leachable compounds. In an operation window defined by temperature and off-gas composition it is possible to selectively oxidize iron …
Fluidized bed roasting of micropelletized zinc concentrate: Part I- Pellet strength and roasting kinetics. Fire and brimstone: The roasting of a Merensky PGM concentrate Fire and brimstone: The roasting of a Merensky PGM concentrate. Sulphating roasting of copper-cobalt concentrates Sulphating roasting of copper-cobalt concentrates
Roasting of copper converter slag containing 4.03% copper, 1.98% nickel and 0.48% cobalt with ammonium sulphate open to atmosphere has been carried out in order to achieve sulphation of copper, nickel and cobalt followed by leaching of the metal values as soluble sulphates with water. ... In an earlier study [6], the effectiveness of …
Corpus ID: 54191970; Sulphating roasting of copper-cobalt concentrates @article{Gntner2012SulphatingRO, title={Sulphating roasting of copper-cobalt concentrates}, author={Jochen H. F. G{"u}ntner and J{"o}rg Hammerschmidt}, journal={Journal of The South African Institute of Mining and Metallurgy}, year={2012}, …
A study of reactions in the fluid-bed roasting of Union Minière's chalcocite concentrates has made it possible to achieve optimum recovery of copper and cobalt during the acid leaching of roaster calcines. ... Cobalt Recovery Through Sulphating Roast of Cu/Co Concentrate of Katanga Mining ... R. Fluid-bed roasting reactions of copper …
Figure 1 demonstrates the influence of roasting duration on the extraction of zinc, copper, iron, cadmium and arsenic at the roasting with addition of 81,5% Fe 2 (SO 4 ) 3 •9H 2 O at 600 and 625°C.
(i) Given below are the steps for extraction of copper from its ore. Write the reaction involved. (a) Roasting of copper (I) sulphide. (b) Reduction of copper (I) oxide with copper (I) sulphide. (c) Electrolytic refining. (ii) Draw a neat and well-labelled diagram for electrolytic refining of copper.
The wastes were characterized by X-ray fluorescence (XRF), particle size distribution and water contents. The chemical characterization showed sludges with high copper concentration, with more than 14% (dry base). In the roasting step, the galvanic sludge was mixed with pyritic waste and the parameters evaluated were galvanic …
Sulphating roasting of copper-cobalt concentrates. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.6, pp.455-460. ISSN 2411-9717. ... Outotec has developed roasting solutions for copper, gold, zinc, lead, molybdenum, and pyrite ores. The continuously expanded and upgraded research facilities provide an excellent basis for developing ...
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 developed roasting solutions for copper, …
The utility model relates to a copper anode slime sulphating roasting rotary kiln. The copper anode slime sulphating roasting rotary kiln comprises a charging device, a rotary kiln heating furnace, an absorbing treatment device and a control system, wherein the charging device comprises a sulphuric acid metering groove, a primary stirring groove …
Laboratory-scale sulphation roasting testwork for copper and cobalt production. P. Sithole X. Goso H. Lagendijk. Materials Science, Chemistry. 2017. TLDR. The results showed that the sulphation of cobalt and copper oxides is fairly feasible, and the kinetics of copper oxide are superior to those of their sulphide counterparts. Expand. 3.
The sulphide ore fed to the roasting plant is treated under sulphating roast conditions, followed by hydrometallurgical extraction. Equipment for the first roasting line has been installed and the plant commissioning completed. ... K. Adham et al., Design of Copper-Cobalt Sulphating Roasters for Katanga Mining Limited in D.R. Congo, Copper …
The oxidative roasting method (Hoffmann, 1989, Kanari et al., 2019, Xi, 2009, Zhang et al., 2017) ... The slag can use water or dilute acid to leach copper, and at the same time can use the generated SO 2 to reduce SeO 2 to recover selenium, the selenium recovery rate reaches more than 93 %(Cha, 2021), but it is still difficult to …
Design of Copper-Cobalt Sulphating Roasters for Katanga Mining Limited, DR Congo Roaster off-gas is treated in two parallel, high efficiency cyclones for dust capture before being sent
The investigation on the mechanism of sulfating roasting using pure zinc and copper ferrites has pointed out that the process occurs through an interaction of the ferrites with SO 3(g), which are generated through decomposition of iron sulfates, to form appropriate sulfates. Therefore, it can be inferred that the reversible gas-phase reaction ...
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