Phase transformation and roasting kinetics of cobalt …
In the roasting process of copper and cobalt ore with sodium sulfate added, sodium sulfate will react with iron sulfate which is the first oxidized in copper and …
Chapter 2 Roasting of Sulfide Minerals
Roasting of Sulfide Minerals. In addition to common metals like copper, lead, zinc, and nickel a number of other metals such as antimony, bismuth, cadmium, cobalt, mercury, and molybdenum occur as sulfide minerals. Suldes are not reduced with the most widely used. lesser stability of CS2 and H2S, compared to most sul des. Reduction of suldes.
Design of Copper-Cobalt Sulphating Roasters for …
Abstract. 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 ...
Sulphation Roasting Studies on Synthetic Copper-Iron Sulphides with
It was also observed that the mixture of copper–iron sulphides yielded a higher amount of copper sulphate (92.7%) than that obtained (40.0%) from copper sulphide alone in the presence of 10 wt ...
Galvanic sludge metals recovery by pyrometallurgical and
This paper reports a study, on laboratory scale, of sulphating roasting to perform a treatment for a selective recovery of valuable metals from galvanic sludge. The target metals were copper, zinc and nickel and the sulphating agent used was pyrite, from coal wastes. The particularity of this treatment is the use of two hazardous wastes as raw ...
LEACHING OF A ROASTED COPPER SULFIDE ORE
In roasting, copper was mainly formed to soluble sulfate by water or dilute acid after roasting. Mostly this method is applied to pretreatment of copper concentrate with high percentage of sulfur. A sulfate promoter can change the roasting atmosphere from oxidation to reduction, with releasing sulfur dioxide, turning metal oxides and sulfides ...
Research on the Process of Sulphatizing Roasting 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.
Selective separation and recovery of selenium from copper …
In view of the difficulty of arsenic-antimony-bismuth recovery of Se and other valuable elements in the process of copper anode slime treatment, this paper adopts one-stage composite leaching of arsenic-antimony-bismuth and two-stage sulfation roasting for high arsenic-antimony-bismuth copper anode slime to recover selenium to realize …
Isothermal Sulphation Roasting of Nickel Sulphide …
These findings indicate that the sulphating reaction temperatures of Ni and Mg were higher than that of Fe, ... Lin Z (1994) Experimental studies on roasting of copper-cobalt complex sulphides. Chin J Process Eng 1:57–60. Google Scholar Yu Y, Tian Y, Zhu C, Sun C, Xu Q (2016) Reaction behaviour of CuS during ammonium roasting. …
The roasting of copper sulphides. II. Natural copper sulphides
The roasting of precipitated copper sulphide in a current of air has been investigated by thermogravimetric analysis in the temperature range 150–800° under isothermal conditions. Chemical ...
Copper Cobalt Sulfating Roasting
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 plants (annual copper production of 30,000–50,000 metric tons) • Autothermic process operating at medium temperatures ...
(PDF) Thermodynamic Investigation of the Sulphation Roasting …
Additionally, copper and nickel were inputted as Cu2S and NiS, respectively. (a) Predominance area diagram for the Fe-Zn-O-S system at 600 °C. (b) Predominance area diagram for the Fe-Zn-O-S ...
Cobalt Recovery Through Sulphating Roast of Cu/Co …
The new roaster and the associated solids and off-gas treatment plants are part of the revitalization of an existing facility, which was historically one of the largest cobalt and copper producers in the world. The sulphide ore fed to the roasting plant is treated under sulphating roast conditions, followed by hydrometallurgical extraction.
The recovery of copper and zinc from a sulphide …
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.
Sulphating roasting of copper-cobalt concentrates | Health
Sulphating roasting of copper-cobalt concentrates Author(s) Guentner, J; Hammerschmidt, J Year. 2012 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 …
Given below are the steps extraction of copper from its ore.
(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.
Cobalt Recovery Through Sulphating Roast of Cu/Co …
The new roaster and the associated solids and off-gas treatment plants are part of the revitalization of an existing facility, which was historically one of the largest …
Application of Sulfide Copper Ores Oxidizing Roasting
The technology of joint reduction and sulfiding smelting of roasted copper ores and calcined saprolite ores is a promising way to use poor and mineral raw materials that are hard to enrich and to reduce SO2 emissions into the atmosphere. ... "Sulphating roasting of copper-cobalt concentrates," J. of the Southern African Institute of Mining ...
The Sulphating Roasting of Copper Sulphide Concentrates
The Sulphating Roasting of Copper Sulphide Concentrates. It is shown that factors associated with conditions whIch are thermodynamically favourable for the formation of …
Sulphating roasting of copper-cobalt concentrates
In this study, oxidizing roasting, segregation roasting, and magnetic separation are used to extract cobalt and iron from refractory Co-bearing sulfur …
Selective separation and recovery of selenium from copper …
From the analysis of the XRD pattern of the residue shown in Fig. 1, it can be clearly seen that the physical phases of copper anode slime are relatively complex, and the main phases included sulfate, oxide, sulfide, intermetallic compounds, and metal elements.The sulfates included barium sulfate and lead sulfate, and the oxides include …
Sulphating roasting of copper-cobalt concentrates
Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.6, pp.455-460. ISSN 2411-9717. Most copper/cobalt ores from the Central African Copperbelt contain sulphidic compounds, …
(PDF) Design of Copper-Cobalt Sulphating Roasters …
The sulphide ore fed to the roasting plant is treated under the "sulphating roast" conditions, followed by hydrometallurgical processing. Equipment for the first …
Sulphating roasting of copper-cobalt concentrates
Laboratory-scale sulphation roasting testwork for copper and cobalt production. The results showed that the sulphation of cobalt and copper oxides is fairly …
Sulfatizing Roasting and Leaching of Cobalt Ores at …
The Outokumpu Oy Cobalt Plant processes nickel, copper, and zinc bearing cobaltiferrous pyrite concentrate. Main operations: sulfatizing roasting, leaching, solution purification and recovery of cobalt metal. Roasting is done in fluidized beds, most of the material being fed as calcine. Green concentrate is used only for the heat requirements, …
Fluid-bed roasting reactions of copper and cobalt sulfide
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 …
Sulphating roasting of copper-cobalt concentrates
Selective sulphating of the valuable minerals is an important condition for the subsequent leaching stage. The dissolved copper and cobalt are recovered by solvent extraction and electrowinning. This technology has been part of an established process for many decades. The concentrates from recent projects on the Copperbelt have lower sulphur ...
Sulphating roasting of copper-cobalt concentrates
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.
Roasting (metallurgy)
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 ores. More specifically, roasting is often a metallurgical process involving gas–solid …
Sulphation roasting studies on synthetic copper–iron …
When the sulphide mixture was roasted with steam–oxygen in the absence of ferric oxide, the copper sulphate formation was up to 83.5% (Fig. 14), whereas with the catalytic addition of 10% Fe 2 O 3, optimum copper sulphate formation (92.7%) was attained. The effect of temperature on roasting of the sulphide mixture was studied with …