roasting nickel concentrates

V ale Inco's smelter in Thompson, Manitoba and Xstrata Nickel's smelter in Falconbridge, Ontario produce nickel mattes from nickel sulfide concentrates. The first step in their processes is fluid bed roasting where a significant portion of the sulfur in the feed is oxidized to SO 2.The resulting, partially oxidized concentrate, which is also called calcine, is collected …

The dependence of the roasting characteristics (fluidized bed temperature, specific productivity of the furnace, specific blasting expenditure, etc.) of nickel sulfide concentrates on various factors (blasting surplus factor, concentrate humidity, oxygen content in blasting, etc.) was studied using the method of the design simulation experiment. Software in the form of a mathematical model …

Mechanism of Na 2 SO 4 promoting nickel extraction from sulfide concentrates by sulfation roasting–water leaching. Metallurgical and Materials Transactions B 49, …

Pandher and Utigard [31] studied roasting of three nickel concentrates, consisting of pentlandite, pyrrhotite, silica and chalcopyrite by TGA analysis in …

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 ...

The roasting of PGM-ore concentrates in a circulating fluidized bed. … tin and nickel. In particular, Indonesia remains among the world's largest exporters of … Royal Nickel Confirms Economic and Technical Feasibility of …

A third phenomenon is the possible melting of some of the sulfide phases as the roasting temperature exceeds approximately 1073 K (800 °C). Experimental Samples of nickel concentrate were obtained from the two nickel smelters.

Mechanism of Na 2 SO 4 promoting nickel extraction from sulfide concentrates by sulfation roasting–water leaching. Metallurgical and Materials Transactions B 49, 1136–1148 (2018).

The extensive testwork conducted during the two experimental RRS campaigns demonstrated thot deep fluid bed roasting of nickel concentrate at high oxygen efficiency is a technically viable operation. Keywords: Metallurgy, Nickel concentrate, Roasters, Fluid bed roasters. $20.00

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 ammonium sulfate under a static air atmosphere, and the roasted products were leached by water, in order to evaluate the extraction of metals.

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 SO₂ content in the outlet gas, the oxidation behaviors were quantified. …

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 ammonium sulfate under a static air atmosphere, and the roasted products were leached by water, in order to evaluate the extraction of metals. The …

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 SO2 content in the outlet gas, the oxidation behaviors were quantified. Isothermal …

Roasting of Nickel Concentrates. 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 SO2 content in the outlet gas, the ...