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 ...
Apr 24, 2019· Hg is obtained from its sulphide ore cinnabar directly in the roasting step. REDUCTION BY CARBON. Sn from oxide ore cassiterite SnO 2 is obtained by heating with coke. Zn from sulphide ore Zinc blende (ZnS). ... The latter reduces any oxide present in the metal eg CuO in the blister copper is reduced to copper. ELECTROLYTIC REFINING.
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.
A: I. Roasting: The process of heating the mineral to high temperature in presence of air (or) oxygen is called roasting. During roasting the mineral gets oxidized. E.g.: 23 2 2ZnS O ZnO SO+→ + 22 Different types of roasting are a. oxidizing roasting b. sulphatizing roasting and c. chloridizing roasting II.
Nov 07, 2019· Copper Solvent Extraction. The separation of copper from nickel is based on the fact that there is an appreciable difference in the pH at which the two metals are extracted. Copper can be extracted, with very small amounts of nickel, at pH 6.0 to 6.5, while nickel is extracted from the copper raffinate at pH 8.0 to 8.2.
Jun 04, 2018· Ores of metals like zinc, lead, copper and nickel, when roasted in air, are converted to their oxides. Ores of some metals like lead may get partially oxidized and converted to sulphate. In such case, it is called sulphating roasting or partial roasting. Ores of metals like silver and gold are mixed with common salt and are heated in air.
Küre Copper Flotation Concentrator whose annual capacity is 1.2 million tons of ore. Earlier studies on these ores, focused on recovering other metallic values in addition to thc major metais by lhe application of a proccss including sulphatizing roasting + acidic lcaching + cyanidation
Mar 25, 2017· The process used by the Rio Tinto Co. is in its essential character a sulphatizing roasting process. The ore is piled up in heaps 30 ft. deep, which are called terreras, and the ore is allowed to heat by chemical action until a sulphatizing roasting condition is produced and sulphates of copper are formed, which are leached out.
KAZ Minerals presentsCopper is one of the top seven metals known since the ancient time. Actually, humankind knows over 170 copper-containing minerals. Coppe...
Lead, zinc, and copper ores often contain it, ... Extraction Processes. ... The chlorination of the metal is effected by roasting the ore with salt as described later. Inquire Now; extraction metal roasting of the ore. extraction metal roasting of the ore. ... The copper is extracted by roasting the ore in air.
Subsequently, an attempt was made to recover the copper from a secondary smelting slag by roasting the material together with the pyritic waste from a copper ore bene- fication plant. Using this technique it may be possible to leach valuable met- als from the calcines and simultaneously to produce H2SO4 from the gaseous product.
LEACHING OF A ROASTED COPPER SULFIDE ORE. Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY. 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.
Roasting is a process of heating a sulfide ore to a high temperature in presence of air. It is a step of the processing of certain ores.More specifically, roasting is 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, e.g. by froth flotation.
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 ...
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.
FIELD: metallurgy; complex processing of copper concentrate. SUBSTANCE: proposed method includes sulphatizing roasting of starting concentrate and leaching-out of cinder at separation of metals; sulphatizing roasting of starting copper concentrate is performed in air at temperature of 500-600°C continued for 980-180 min; cinder thus obtained is leached-out with sulfuric acid solution or water ...
The article presents the results of the study of sulphating roasting of tailings of copper slag processing (sands) of the Sredneuralsk copper-smelting plant (SCSP) using iron sulfates (II) and (III). The elemental and phase composition, as well as the microstructure of SCSP sands were studied. Based on the thermodynamic calculation, the temperature ranges of the sulphating roasting and the ...
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 ...
urates the ore to be leached,gives a better,or as gpod an extraction,as one whose volume is ten times as great. This means a conservation of water,as well as an estimate on the size of a leaching tank req uired. Sulphatizing Roast. Temperature at beginning of roast . 15ifc. Temperature at completion of roast …
Dec 01, 1977· Recovery of arsenic in copper globules (based on 500p.p.m. in ore) Weight (g) Smelt in charge in copper recovery B10 1-77 0-85 48 B12 0-96 0-54 56 B13 1-40 0-79 57 phases present in the metal resulting from smelts B4, 10 and 12, all made with Timna oxide ores were: alpha copper solid solution, alpha iron, cuprous oxide and sulphide, and slag.
Corpus ID: 54191970. Sulphating roasting of copper-cobalt concentrates @article{Guentner2012SulphatingRO, title={Sulphating roasting of copper-cobalt concentrates}, author={J. Guentner and J. Hammerschmidt}, journal={Journal of The South African Institute of Mining and Metallurgy}, year={2012}, volume={112}, pages={455-460} }
Outotec built it first sulphatizing roaster in Zambia about 30 years ago. ... The products of oxidation roasting of sulfide copper ores can be considered as an effective sulfiding agent and ...
these complex ores [Project, 1994]. Researches were conducted on recovering the metallic values by the application of a process including sulphatizing roasting, acidic leaching and cyanidation. so2 gases produced during roasting are harmful to the environment. …
Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.. As in all mining operations, the ore must usually be beneficiated (concentrated).
Jan 01, 1990· Hydrometallurgy, 25 (1990) 317-328 317 Elsevier Science Publishers B.V., Amsterdam Recovery of metal values from copper smelter slags by roasting with pyrite F. Tiimen* and N.T. Bailey Department of Chemical Engineering, University of Birmingham, P, O. Box 363, Edgbaston, Birmingham B15 2TT (U.K.) (Received May 28, 1989; revision accepted February 24, 1990) …
Roasting. It is a process wherein the ore is heated either alone or with some other material in excess of air below the fusion point of the ore. Usually, this method is used for sulphide ores. In roasting, definite chemical changes take place to form oxide or chloride of the metal. Ores of metals like zinc, lead, copper and nickel, when roasted ...
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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.