The roasting process of ZnS concentrate makes use of four Lurgi fluidized bed roasters to produce calcine (which contains ZnO and ZnFe2O4 as zinc products) and SO2 gas. The roasting plant consists of two small roasters and two big roasters, with cross-sectional areas of 18 m 2and 35 m respectively. A
While the invention can be applied to the roasting of metal sulphide concentrates in general, it is particularly applicable to concentrates containing iron sulphides, such as, for example, the nickel-copper sulphide concentrates and the nickeliferous pyrrhotite concentrates derived from the sulphide ores of the Sudbury Basin.
Other articles where Roasting is discussed: history of Europe: Control over resources: …mining techniques and needed initial roasting before smelting. At the same time, they were more widely available than surface deposits, and there were sources in both central and western Europe—ores in Germany, Austria, and the Czech and Slovak Republics were exploited from the early 3rd millennium …
Two-stage oxidation-sulfation roasting of nickel sulfide concentrate in fluidized bed was investigated to generate water-soluble metal sulfates as an alternative process to smelting of the sulfide concentrate for the recovery of valuable metals. The first stage, i.e., oxidation roasting, was employed to preferentially oxidize the iron before performing sulfation roasting.
The fluidized bed sulfation roasting process followed by water leaching was investigated as an alternative process to treat nickel sulfide concentrate for nickel production. The effects of several roasting parameters, such as the sulfation gas flow rate, roasting temperature, the addition of Na 2 SO 4, and the roasting time, were studied. 79 pct Ni, 91 pct Cu, and 95 pct Co could be recovered ...
Nickel Refining Various processes are used to refine nickel matte. Fluid bed roasting and chlorine-hydrogen reduc-tion produce high-grade nickel oxides (more than 95% nickel). Vapor processes such as the carbo-nyl process can be used to produce high-purity nickel pellets. In this process, copper and precious metals remain as a pyrophoric ...
The objectives of this chapter are to describe the principles involved in the roasting and smelting of nickel sulfide concentrates and industrial practice of fluidized–bed roasting and electric ...
Aug 23, 2018· Alternate Roasting Approach RNC's alternate roasting approach allows for the use of nickel concentrate by a wide range of nickel consumers, including large scale integrated NPI/stainless plants converting feed into finished product at higher recoveries and significantly lower processing costs, resulting in expected payabilities that are much higher than traditional smelting and refining.
Apr 05, 2018· As a more environmentally friendly and energy-efficient route, the sulfation roasting–water leaching technique has been developed for highly effective extraction of non-ferrous metals from nickel sulfide concentrate in the presence of a Na 2 SO 4 additive. The effects of several important roasting parameters—the roasting temperature, the addition of Na 2 SO 4, the holding …
ing and converting processes, for example, flash smelting by the International Nickel Company and Outokumpu, submerged tuyere smelting by Noranda and Teniente, Ausmelt/Isasmelt matte smelting, continuous converting by Outokumpu and Mitsu- ... dead roasting of sphalerite concentrate to an all oxide product is the pre ...
Nickel: smelting; Extraction and purification; Nickel is recovered through extractive metallurgy: it is extracted from its ores by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on the composition of the impurities.
The recovery of valuable metals from complex sulfide concentrates was investigated via chlorination roasting followed by water leaching. A reaction process is proposed on the basis of previous studies and the results of our preliminary experiments. During the process, various process parameters were studied, including the roasting temperature, the addition of NH4Cl, the roasting time, the ...
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 ...
Studied the reason for the formation of chlorine and sulfur during roasting concentrate. Abstract. The low-temperature calcination of nickel sulphide concentrates with sodium chloride and subsequent hydrometallurgical processing is a promising alternative methods. This study aims to identify the interaction products of sulphide nickel ...
concentrate roasting copper Prior art date 1999-02-26 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number EP00912235A Other languages German (de) French (fr) Other versions
Nickel concentrate as received is Raglan cc Ontario, Canada. It is mainly composed of pentland and small amount of siliceous flux and gangue mate Roasting of the nickel concentrate was conducted in t roasting test, Raglan concentrate of 5 grams was put 1 mass transfer rate between the …
Nov 01, 2019· The relationships between the NaCl content of the mixture and the subsequent Ni, Cu, and Fe recoveries from the roast residue from the calcination of Concentrate 1 and water leaching are shown in Fig. 1.The calcination was performed at 400 °C for 90 min, and the salt content was 10–400% of the concentrate weight.
Apr 11, 2017· The recovery of valuable metals from complex sulfide concentrates was investigated via chlorination roasting followed by water leaching. A reaction process is proposed on the basis of previous studies and the results of our preliminary experiments. During the process, various process parameters were studied, including the roasting temperature, the addition of NH4Cl, the roasting time, the ...
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.
May 04, 2010· 10%· Isothermal Roasting of Nickel Concentrates. To assess the roasting behavior of the nickel concentrates, separate tests were carried out in the TGA in which 100 mg concentrate samples were heated in argon at 15 K/min to a set-point temperature between 673 K (400 °C) and 1123 K (850 °C), and then oxidized isothermally in air for 1 to 2 hours.
alternative process to treat nickel sulfide concentrate for nickel production. The effects of several roasting parameters, such as the sulfation gas flow rate, roasting temperature, the addition of
The recovery of valuable metals from complex sulfide concentrates was investigated via chlorination roasting followed by water leaching. A reaction process is proposed on the basis of previous studies and the results of our preliminary experiments. During the process, various process parameters were studied, including the roasting temperature, the addition of NH4Cl, the roasting ...
Apr 01, 2019· Roasting of nickel concentrates. Mater. Trans. B Process Metall. Mater. Process. Sci Metall (2010), 10.1007/s11663-010-9373-5. Google Scholar. Rajic and Zlatanovic, 1988. S. Rajic, D. Zlatanovic. Chemical reactions between molybdenum disulfide and sodium chloride in a stream of oxygen in the temperature range 470–900 K.
The ferronickel concentrate with Ni of 16.16%, Fe 73.67%, and nickel recovery of 90.33% was obtained under the conditions used: A segregation roasting temperature of 1100 °C, a segregation roasting time of 90 min, a calcium chloride dosage of 15%, an iron concentrate dosage of 30%, a coke dosage of 15%, a coke size of −1 + 0.5 mm, a magnetic ...
Download Citation | Roasting of Nickel Concentrates | The oxidation of three nickel concentrates from two Canadian smelters was studied by thermogravimetric analysis. Concentrate samples were ...
such as arsenic, antimony, cobalt, germanium, nickel, and thallium. Insoluble zinc ferrite, formed during concentrate roasting by the reaction of iron with zinc, remains in the leach residue, along with lead and silver. Lead and silver typically are shipped to a lead smelter for recovery, while the zinc is
Jun 28, 2009· 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 of ...
process used for nickel. Chloride electrolytes are used although sulfuric acid solutions are used more often. Waste Characteristics Air emissions Sulfur dioxide (SO2) is a major air pollutant emitted in the roasting, smelting and converting of sulfide ores (nickel sulfide concentrates contain 6-20% nickel and up to 30% sulfur).