Sulfide Ore
During partial roasting in the temperature range 550–600°C (1022–1112°F), approximately 40% of the sulfur is oxidized and enough heat is generated to make the roasting. ... nickel ore concentrate containing less than 1% moisture is fed to the furnace along with preheated air, oxygen-enriched air (30–40% oxygen), or pure oxygen ...
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Extraction of Metals from Nickel Concentrate by Low
Nickel sulfide ore is an important raw material for nickel production. It is a complex mineral containing nickel, copper, cobalt and platinum group elements, which can provide 60% of the world's nickel products. 1,2,3 China's Jinchuan Nickel Mine is one of the well-known and super-large polymetallic associated magmatic nickel sulfide …
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Nickel Ore
The sources of sulfur in the charge are carbon reductant and heavy fuel oil (1.8% S) and phosphorus, mainly carbon reductant and nickel ore. The smelting of ferronickel using lean nickel ores usually starts with roasting (calcining) of the ore mixture with limestone (~one third of the ore), anthracite (~1/10 of the ore amount), and recycled ...
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Copper–Nickel Ore Processing by Low-Temperature …
Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel …
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Roasting and Leaching Behavior of Nickel Laterite Ore
Abstract Nickel is mostly extracted from sulfide ores, however, laterite ores account for over 60 pct of all nickel resources in the world, and despite its …
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Extraction of Metals from Nickel Concentrate by Low
sulfide ore. This ore has the characteristics of low nickel content, complex production process and high gangue content,5 which has caused many obstacles to using the pyrometallurgical process.6 In recent years, many studies have been carried out on the direct and simultaneous extraction of valuable metals such as nickel, copper and cobalt ...
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Roasting | SpringerLink
Roasting. Called also calcination, it is the reaction process of solid materials such as ore, concentrate, or metal compound without melting at a high temperature. It is used in chemical or metallurgical production to obtain chemical constituents required for the next process of either smelting or leaching. It can also be seen as a process of ...
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Synchronous extraction of nickel and copper from a mixed …
Mixed oxide-sulfide nickel ore is becoming the major source of nickel produced in the nickel smelting enterprise due to the increasing global demand of nickel and the depletion of high-grade nickel sulfide ore.Low temperature roasting technique by ammonium sulfate is a potential cleaner production process with high metal recovery, …
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Extraction of metals from complex sulfide nickel concentrates …
The results demonstrate that this process provides an effective approach for extracting multiple metals from complex concentrates or ores. ... The bioleaching of nickel−copper sulfides, Hydrometallurgy, 91(2008), No. 1-4, p. 70. ... M. Shamsuddin, and P.M. Prasad, Salt roasting of an off-grade copper concentrate, Hydrometallurgy, …
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Extraction of Copper and Nickel from Low-Grade …
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Synchronous extraction of nickel and copper from a
Sulfide Ore
13.5 Heap Leaching of Nickel Sulfide Ore. An alternative to intensifying the rate of leaching of concentrates is to heap leach the whole ore. This has the significant advantage of eliminating the concentration of the sulfides, which is the step that has the lowest recovery on route from ore to metal. Nickel sulfide ores are processed by heap ...
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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 …
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Copper–Nickel Ore Processing by Low-Temperature Roasting …
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 ...
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Sulfate roasting copper-cobalt sulfide concentrates
Sulfate roasting copper-cobalt sulfide concentrates. L. Theys, L. Lee. Published 1 February 1958. Engineering, Chemistry, Materials Science. JOM. This is the story of the successful application of fluidized bed technique to a series of reactions taking place within narrow ranges of operating conditions, and the steps by which Union Miniere ...
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Roasting | metallurgy | Britannica
Roasting, or heating in air without fusion, transforms sulfide ores into oxides, the sulfur escaping as sulfur dioxide, a gas. Smelting ( q.v.) is the process used in blast furnaces to reduce iron ores. Tin, copper, and lead ores are also smelted. This article was most recently revised and updated by Robert Curley.
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Copper extraction
The Chino open-pit copper mine in New Mexico Chalcopyrite specimen from Huarón mine, Peru. Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper ores consists of a series of physical, chemical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, …
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Roasting Solutions
in developing processing technologies for concentrates and ores. Safe, easy, and cost-efficient to operate, they offer low waste generation and high ... pyrite, gold, copper, …
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A Study of the Feasibility of Using Ammonium Sulfate in Copper—Nickel …
The possibility of applying a combined concentration and metallurgical method for processing low-grade and refractory copper–nickel ores was considered. The resulting rougher and scavenger flotation concentrate contained 2.07% nickel and 0.881% copper at a recovery of 85.44% and 89.91%, respectively. The concentrate was then roasted …
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Direct leach approaches to Platinum Group Metal (PGM) ores …
The major portion of platinum and palladium produced today from primary sources originates from the Bushveld Igneous Complex in South Africa. The most important reefs mined are the Merensky, Upper Group Two (UG-2) and Platreef (Cramer, 2001).Ore grades range from 3 to 8 g/t PGM, with associated nickel and copper in the 0.1–0.2% …
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Cobalt extraction
The ores are treated by a sulfatizing roast in a fluidized bed furnace to convert copper and cobalt sulfides ... based on the older Forward process developed by Dr. Frank Forward for the recovery of copper and nickel from those same mines. Nickel sulfide concentrates can be treated by either roasting or flash smelting to produce matte from ...
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Sodium sulfate activation mechanism on co-sulfating roasting to nickel
In addition, nickel and copper are dispersed in different minerals including sulfide ore and oxide ore, a fraction of nickel is present as crystalline substitution in iron lattices or silicates ...
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A Study of the Feasibility of Using Ammonium Sulfate in …
Keywords: copper–nickel ore; flotation; rougher concentrate; ammonium sulfate; roasting; aque-ous leaching 1. Introduction To date, more than 400 copper–nickel ore deposits have been discovered worldwide, and the combined global reserves of copper and nickel are currently estimated at 1.6 billion tons and 210 million tons, respectively.
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Copper–Nickel Ore Processing by Low-Temperature …
Abstract The phase transitions of sulfide minerals—pentlandite and chalcopyrite—are tested in roasting with mixture with ammonium sulfate. The behavior of the mixture during roasting is assessed via the synchronous thermal and X-ray phase …
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RECOVERY OF NICKEL AND COPPER FROM …
The X-ray diffraction of nickel sulfide concentrate ore Fig. 2. The X-ray diffractions of the sulfide concentrate after oxidation roasting at 400 oC, 500 C ... interesting to note abnormal leaching behaviour of copper for a roasting temperature of 600 oC. This might be caused by the decomposition of copper sulfate and accelerated the ...
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Production of Nickel Concentrate from Ground Sulfide Ore
This chapter explains the process of nickel concentration from ground sulfide ore, the starting material. This is necessary because mined nickel sulfide ores contain between 1% and 3% Ni only and ...
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Solid State Extraction of Nickel from Nickel Sulfide Concentrates
The conventional smelting and refining of Ni sulfide concentrates is an effective strategy for extracting Ni from sulfide ores. However, during the smelting process, sulfur is oxidized to sulfur dioxide (SO 2), which poses a significant environmental hazard.The present work investigates the feasibility of an alternative process to recover …
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FLUID BED ROASTING OF METAL ORES AND CONCENTRATES …
Abstract. The main features of fluid bed roasters are described. The key process requirements for arsenic removal from metal concentrates (copper and nickel) and ores (gold) by roasting are ...
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Synchronous extraction of nickel and copper from a …
The mineralogical phase identification of the ore samples was carried out using XRD (Rint-2000, Rigaku), and the results in Fig. 1 indicate that the major …
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Current Status of Copper-Ore Processing: A Review
The ores of sulfide copper-nickel, copper-pyrite deposits, and ores of copper sandstones and slates are primarily pro-cessed abroad. The amount of copper in copper sand- ... The copper content in the original ores is 0.29%. The final copper concentrate produced contains 25.1% copper with 86% recovery. The Mikheevskii MPE, producing 18 million t of
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Roasting of Nickel Concentrates | Metallurgical and …
Samples of nickel concentrate were obtained from the two nickel smelters. In addition to the Strathcona concentrate mined in Sudbury and the A2 concentrate produced from ore mined in Thompson, nickel concentrate from the Voisey's Bay Concentrator (VBN) was also tested, as this is currently processed along with A2 …
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