from low-grade mixed oxide–sulfide nickel concentrate. The feasible roasting conditions were discussed by Table I. Chemical Composition of Nickel Concentrate (Weight Percent) Element Ni Cu Co Fe S MgO SiO 2 CaO Al 2O 3 Low-Grade Nickel Concentrate 4.32 2.54 0.1 30.5 23.0 9.63 13.12 1.08 0.86
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 …
This paper describes a minimum-pollution process for smelting dead-roasted chalcopyrite concentrate directly to blister copper in a blast furnace. The process depends on converting the preponderant portion of the iron in the concentrate to its highest-valence oxide during dead roasting and on minimizing residence time of the …
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 components with sodium chloride at temperatures of 400–450 °C.
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 ...
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 with coke in an electric furnace to yield a sulphur ... Dead roasting of zinc concentrates is practised at industrial scale at ...
The concentrate, oxygen and nitrogen create a dispersion in the burners. The products of flash smelting are molten sulfide matte with richer content of nickel, molten slag that is lean in nickel ...
A series of chlorination roasting experiments were carried out between 200 and 325°C with the addition of NH4Cl and with the reaction time kept constant. The extraction of met-als was determined by the methods described in section 2.2. The effect of roasting temperature on the extraction of met-als is shown in Fig. 5.
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 ...
1. Introduction. Nickel is an important strategic metal produced at over 2 million tonnes annually [1].Approximately 60% of all Ni is consumed in the production of stainless steel [2, 3].Currently, Ni is primarily extracted from two types of ores: laterites and sulfides [[4], [5], [6], [7]].Although sulfide ores account for a smaller fraction of global Ni …
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 Na2SO4 additive. The effects of several important roasting parameters—the roasting temperature, the …
A method is proposed for processing nickel sulfide concentrates based on low-temperature roasting with sodium chloride. In the course of research, the dependence of valuable component extraction on … Expand
A method is proposed for processing nickel sulfide concentrates based on low-temperature roasting with sodium chloride. In the course of research, the dependence of valuable component extraction on excess sodium chloride and roasting temperature and duration is determined, and also cinder water and sulphuric acid leaching regimes are …
The low-temperature roasting of nickel-copper sulfide concentrates with sodium chloride (at 400–450 °С) and subsequent hydrometallurgical processing is a promising alternative method. An ...
The roasting process with chloride salts, namely KCl, NaCl, CaCl 2, and NH 4 Cl, is one of the alternative pyrometallurgical techniques for extracting metals from sulphidic ores/concentrates ...
nickel processing, and as an alternative process to treat nickel sulfide concentrate, a two-stage oxidation-sulfa-tion roasting process followed by leaching was proposed and investigated. Sulfation roasting to treat nickelifer-ous sulfide ores or low grade concentrates was investi-gated in the period from 1960s to 1990s.[7–16] In general,
nickel Two-stage roasting (partial roast-ing + dead roasting) BFB Removal of As (partial roasting), Removal of S and C (dead roasting) Temp: same as partial/dead roasting, Oxygen: same as partial/dead roasting As containing Au concen-trate "As-free" Au- concentrate, Sulfuric acid, Steam Gold roaster Sulfating roasting (exothermic ) BFB
A method is proposed for processing nickel sulfide concentrates based on low-temperature roasting with sodium chloride. In the course of research, the dependence of valuable component extraction on excess sodium chloride and roasting temperature and duration is determined, and also cinder water and sulphuric acid …
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 …
The success of the sulfation-roasting-leaching process depends on iron behavior. Due to its higher amount, it is sulfated before nickel. However, the stability of iron sulfates is lower than the nickel sulfate and during the decomposition of iron sulfate, the sulfur xide (SO 3) is liberated and reacts with nickel to form nickel sulfate.This …
Engineering, Environmental Science. 2006. The paper describes the development of furnace designs by Hatch in conjunction with the smelting plants in Africa to meet the intense process requirements in certain applications; continued…. Expand. 8. PDF. Semantic Scholar extracted view of "Deep roasting of nickel concentrate" by C. Diaz …
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 2SO
This paper describes a chloridizing roasting process applied to two types of nickel and copper-bearing sulfide concentrates. One was copper rich and the other nickel rich. The paper gives a full account of the process as investigated in various batch roasters, and in multiple hearth and rotary roasters. For commercial viability, the paper finally examines …
KGHM Glogow - 2017. e: FluoSolids® Roaster SystemFacilities: One Fluidized Bed Dead Roaster for reduction of carbon and sulfur of copper concentrate and in-bed steam coils for cogenerati. n of electricity, 480 dry tpd. KGHM Glogow is one of the world's largest smelting complexes and the FluoSolids roasting system will reduce carbon and ...
He found that the loss was greatly reduced by diminishing the quantity of salt, and by reserving it until the dead roasting was nearly complete. In the chloridising roasting of a Mexican ore, consisting mainly of magnetite and pyrites with 3.5 to 7 per cent, of chalcopyrite, C. A. Stetefeldt found the losses of gold to be from 42.8 to 93 per ...
@article{Zhong2024EfficientEO, title={Efficient Extraction of Ni, Cu and Co from Mixed Oxide–Sulfide Nickel Concentrate by Sodium Chloride Roasting: Behavior, Mechanism and Kinetics}, author={Peng Zhong and Wenning Mu and Weisong Sun and Yuanhang Zhou and Ruimin Yang and Qing Wang and Xuefei Lei and Shaohua Luo}, …
The roasting of nickel-bearing sulfides is a complex but important process which has not been adequately characterized. Combination of X-ray diffraction and scanning electron microscopy has been proved to be useful for such experiments. The leaching results of nickel, copper, iron and cobalt was analyzed by ICP methods. Process possibility of …
y Two-stage roasting of gold-bearing roaster system installed in the 1960s. Technip Energies 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,
In this study, a low-temperature chlorination roasting and water leaching process was used to co-extract Ni, Cu and Co from low-grade nickel sulfide concentrate. When the concentrate particle size is 75–88 μm, roasting temperature is 225 °C, roasting time is 2.5 h and chlorination agent dosage is 180 %, 93.5 % Ni, 90.7 % Cu and 88.7 % …
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@article{Cui2018SodiumSA, title={Sodium sulfate activation mechanism on co-sulfating roasting to nickel-copper sulfide concentrate in metal extractions, microtopography and kinetics}, author={Fuhui Cui and Wenning Mu and Shuai Wang and Hai-xia Xin and Qian Xu and Yuchun Zhai and Shao‐hua Luo}, journal={Minerals …
