OneTunnel | Deep roasting of nickel concentrate
Deep roasting in fluid bed roasters is the first unit operation in Inco's "roast-reduction smelting" process for the treatment of nickel sulphide concentrates. The roaster product, a low sulphur calcine, is reduction smelted with coke in an electric furnace to yield a sulphur-deficient matte which is then converted to low (<1%) iron matte in Peirce-Smith converters. …
CONROAST: DC ARC SMELTING OF DEAD-ROASTED …
process for the treatment of nickel-copper and PGM (platinwn group metal) sulphide concentrates. The ConRoast process is based on the removal of sulphur by roasting, followed by smelting of …
(PDF) The Direct Leaching of Nickel Sulfide Flotation Concentrates …
The extraction of nickel (Ni) from sulfide resources commences with flotation to produce a concentrate which is then smelted to produce a nickel-enriched phase called matte, and further refined to ...
Roasting of Sulfide Minerals
Nickel is precipitated by blowing hydrogen at 30 atm in the purified leach liquor at 170 °C. ... the only alternative seems to be the conversion of sulfide concentrates into oxides by dead ...
Lecture 14: Pyro metallurgical extraction (Roasting) …
In dead roasting all sulphides are converted in to oxide. This is done to extract Zn from its sulphide ore. In sulphatising roasting, sulphide is converted into sulphate as sulphatecan be …
Lecture 15: Thermodynamics of roasting Contents
A copper concentrate may be roasted autogenously in a multiple hearth furnace provided sulphur is not eliminated completely. Dead roasting would require additional thermal energy.
[PDF] 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. Sulfides are not reduced with the most widely used reducing agents, carbon and hydrogen, because the free energy change for the reactions 2MS + C = 2M + CS2 and MS + H2 = M + …
Sulfation Roasting of Nickel Oxide–Sulfide Mixed …
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate was roasted with the addition of …
ConRoast:
Dead roasting of copper concentrates, to a sulphur content of less than 1.5%, achieves an immediate removal of 96 to 98% of the original sulphur. ... Deep roasting of nickel concentrate, CIM Bulletin, Vol.87, No.981, June 1994, pp.72-78. 30. DGE Kerfoot, Nickel, Ullmann's Encyclopedia of Industrial Chemistry, Fifth Edition, Vol.A17, VCH ...
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. Sulfides are not reduced with the most widely used redu- ... example, dead roasting of sphalerite concentrate to an all oxide product is the pre-
Recovery of Copper from Copper Sulfide Concentrate by Sulfation Roasting
The ConRoast process is based on the removal of sulphur by roasting, followed by smelting ofthe dead-roasted concentrate in a DC arc furnace using an iron-based alloy as a collector for nickel, copper, cobalt, and PGMs.
Lecture 14: Pyro metallurgical extraction (Roasting) …
Keywords: roasting, dead roasting, sulphatizing roasting Introduction: In Pyro metallurgicalextraction of metal, thermal energy is one of the important inputs. Different unit processeslike roasting, smelting, converting and refining require large amount of thermal energy. This lecture discusses roasting. Roasting
Roasting of Nickel Concentrates
Roasting of Nickel Concentrates R. PANDHER and T. UTIGARD The oxidation of three nickel concentrates from two Canadian smelters was studied by thermogravimetric analysis. Concentrate samples were heated to 1223 K (950 C) in inert or oxidizing atmospheres to determine the reaction behavior. By recording the mass change as well as the SO
Filtre standard Dorr-Oliver FluoSolids® Systems
arseno-pyrite concentrates for arsenic provided basic and detailed engineering, construction, and sulfur removal y Partial roasting of copper and nickel sulfides for sulfur control in smelting y Dead roasting of pyrite, pyrrhotite, zinc, nickel and other sulfides y Sulfation roasting of Cu and Cu/Co sulfides (RLE processes)
Selective sulphidation and flotation of nickel from a nickeliferous
It was found that the nickel sulphides responded to flotation at pH 9 with PAX and TETA additions and that maximum grades of between 6 to 8% were achieved with the average cumulative grade of the nickel concentrates having values of between 4 and 5 wt.% nickel. Cumulative recoveries were low, with values between 50% and 60% on a sulphide basis ...
(PDF) Sulfide Mineral Roasting for Metal Extraction
For example, dead roasting of sphalerite concentrate to an all-oxide product is the prerequisite for the pyrometallurgical smelting processes. For copper and nickel extraction, only partial roasting is practiced. In order to produce a mixed oxide– sulfate product sulfation roast is preferred. The most outstanding example of this is found in ...
Simultaneous extraction of metals from nickel concentrate …
The transformation evolution of nickel concentrate in the roasting process using NH4HSO4 is shown in Fig. 6. The main product at a roasting temperature below 400 °C is metalâˆ'ammonium complex. When the temperature is higher than 400 °C, some metalâˆ'ammonium complexes are transformed into metal sulfates [27]. ...
OneMine | Dead Roasting of Dumont Nickel Concentrate
The absence of copper and precious metals in the ore renders this concentrate amenable to processing by dead roasting in a fluid-bed roaster and smelting in an electric …
Roasting of Nickel Concentrates | Metallurgical and Materials
roasted nickel calcine, aiming to maximize the metal :entrate are: pentlandite pynhotite Fel S, Is. The main species that the roasted calcine may el oxide (NiO), nickel fen-ite (NiFe204), cupñc …
Inco roast-reduction smelting of nickel concentrate
Semantic Scholar extracted view of "Inco roast-reduction smelting of nickel concentrate" by C. Diaz et al. Skip to search form Skip to main content Skip to account ... {Diaz1994IncoRS, title={Inco roast-reduction smelting of nickel concentrate}, author={Carlos Manuel Diaz and Bruce Randolph Conard and Charles E. O'neill and A. D. Dalvi ...
OneTunnel | Dead Roasting of Dumont Nickel Concentrate
Royal Nickel Corporation is developing the Dumont Nickel Project, a large nickel sulphide deposit located near the town of Amos, Québec. The nickel occurs as pentlandite, heazlewoodite, and awaruite. The relatively low grade ore can be processed to a very high grade nickel concentrate, containing 29% Ni. The absence of copper and precious metals in the ore …
Fluid bed roasting of metal sulphides at high temperatures
Definitions. the invention relates in general to the roasting of metal sulphides, more specifically to fluid bed roasting of iron-bearing sulphides and particularly to agglomerative roasting of pyrrhotite-bearing concentrates at temperatures sufficient to cause fusion during roasting. It is well known that government restrictions which are now being placed on SO 2 emissions to the atmosphere ...
(PDF) Sulfation Roasting of Nickel Oxide–Sulfide …
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate ...
Smelting of Nickel Sulfide Concentrates by Roasting and …
DOI: 10.1016/B978-0-08-096809-4.10017-6 Corpus ID: 135415080; Smelting of Nickel Sulfide Concentrates by Roasting and Electric Furnace Smelting @inproceedings{Crundwell2011SmeltingON, title={Smelting of Nickel Sulfide Concentrates by Roasting and Electric Furnace Smelting}, author={F. K. Crundwell and Michael S. Moats and …
Fluidized Bed Selective Oxidation-Sulfation Roasting …
fluidized bed oxidation roasting of nickel concentrates. DAWEI YU, Ph.D. Candidate,is with the Department of Materials Science and Engineering, University of Toronto, 184 College Street,
OneMine | Dead Roasting of Dumont Nickel Concentrate
Royal Nickel Corporation is developing the Dumont Nickel Project, a large nickel sulphide deposit located near the town of Amos, Québec. The nickel occurs as pentlandite, heazlewoodite, and awaruite. The relatively low grade ore can be processed to a very high grade nickel concentrate, containing 29% Ni. The absence of copper and precious metals in the ore …
Treatment of metal sulphide concentrates by roasting and …
Total, or dead, roasting involves the complete oxidation of all sulphides, usually for a subsequent reduction process. ... Inco's roast-reduction smelting process 25-29 involves deep roasting of nickel concentrate in fluidized-bed roasters. The roaster off-gas is treated in a sulphuric acid plant. The low-sulphur calcine is reduction smelted ...
Roasting of Nickel Concentrates
This study aims to identify the interaction products of sulphide nickel concentrate components with sodium chloride at temperatures of 400–450 °C.
Roasting of Nickel Concentrates
The oxidation of three nickel concentrates from two Canadian smelters was studied by thermogravimetric analysis. Concentrate samples were heated to 1223K (950°C) in inert or oxidizing atmospheres ...
Dorr-Oliver FluoSolids® Systems
arseno-pyrite concentrates for arsenic and sulfur removal y Partial roasting of copper and nickel sulfides for sulfur control in smelting y Dead roasting of pyrite, pyrrhotite, zinc, nickel and other sulfides y Sulfation roasting of Cu and Cu/Co sulfides (RLE processes) y Reduction roasting of iron ores and nickel laterite ores