2022年5月16日 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 produce pure Ni products
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2024年4月17日 A low temperature NaCl roasting-water leaching process is used to extract Ni, Cu and Co from low-grade mixed oxide–sulfide nickel concentrate. The thermodynamics of
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2022年2月11日 McDonald et al. treated a high iron–low nickel concentrate by pressure oxidation at 250 °C, and the extraction of base metals from such nickel sulfide concentrates
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2022年6月7日 Although largely studied, contradictory results on nickel oxide (NiO) properties can be found in the literature. We herein propose a comprehensive study that aims at leveling
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2020年6月18日 Extraction of metals from complex sulfide nickel concentrates by low–temperature chlorination roasting and water leaching.
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2020年5月29日 In this study, we investigate the effect of K 2 FeO 4, as a new and soluble Fe salt at alkaline conditions, on oxygen-evolution reaction (OER) of Ni oxide. Both oxidation and
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2018年9月17日 This review summarizes the latest advances in composites of NiO with graphene or graphene derivatives. The synthetic strategies, morphologies, and electrochemical performance of these composites are
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2020年5月5日 Pyrometallurgical smelting and refining is the dominant method of extracting Ni from sulfide concentrates [14,15]. Prior to refining, the concentrate is smelted in an oxidizing atmosphere to yield a Ni-rich matte while simultaneously oxidizing the iron to iron oxide; the iron oxide is fluxed with silica to form an iron silicate slag that is immiscible with the matte [[16],
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2019年11月25日 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, ...
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The so-called "Mond Process" involves the conversion of nickel oxides to pure nickel metal. The oxide is obtained from nickel ores by a series of treatments including concentration, roasting and smelting of the minerals. In the first step of the process, nickel oxide is reacted with water gas, a mixture of H 2 and CO, at atmospheric pressure ...
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2021年2月18日 The conventional nickel smelting and refining is the dominant strategy for nickel production from the sulfide nickel ores. The main disadvantages are the significant amount of SO 2 emissions during smelting and complex refining processes. In this paper, the authors investigated a solid-state nickel extraction method that recovered nickel values into
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2018年3月10日 Because of the rapid rise at the rate of approximately 4.7% per year in stainless steel demand (Norgate and Jahanshahi, 2011), nickel sulfide ore has been rapidly exploited in recent years, accelerating the depletion of nickel sulfide ore, so that mixed oxide-sulfide nickel ore is becoming the major source of the nickel product in nickel smelting enterprise.
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2019年1月10日 Nickel extraction from primary resources such as ores/minerals (sulfides, arsenides, silicates, and oxides) including the unconventional one viz., the polymetallic sea nodules, and various ...
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2010年8月1日 Download Citation Roasting of Nickel Concentrates ... However, when NaCl is added, nickel oxide formation is favourable at temperatures as low as 300°C, ...
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The leaching results of nickel, copper, iron and cobalt was analyzed by ICP methods. Process possibility of polymetallic sulfide concentrates through a three-step procedure (oxidation roasting — chlorination — water leaching) was suggested. Ammonium chloride could react with nickel/copper oxides to produce intermediate complexes.
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2023年10月20日 Nickel concentrates typically are smelted and refined to produce Class 1 nickel products which ... This process produces a slag containing iron oxide along with fluxing agents such as calcium and silicon oxide, an off-gas containing sulfur dioxide that can be used to manufacture sulfuric acid for sale, nickel metal, a cobalt ...
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2019年11月13日 To detect the adaptability when the CaO-modified slag for treating high-magnesia nickel sulfide concentrate in flash smelting, the synergistic effect of MgO and other oxides on the microstructure ...
More2019年11月25日 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, ...
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2015年10月15日 The chloridization and reduction roasting of high-magnesium, low-nickel oxide ore containing 0.82 pct Ni and 31.49 pct MgO were investigated in this study. Mineralogical investigation indicated that 84.6 pct of
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2019年11月13日 To detect the adaptability when the CaO-modified slag for treating high-magnesia nickel sulfide concentrate in flash smelting, the synergistic effect of MgO and other oxides on the microstructure ...
MoreThe leaching results of nickel, copper, iron and cobalt was analyzed by ICP methods. Process possibility of polymetallic sulfide concentrates through a three-step procedure (oxidation roasting — chlorination — water leaching) was suggested. Ammonium chloride could react with nickel/copper oxides to produce intermediate complexes.
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2011年1月5日 Nickel sulfide concentrates from two Canadian nickel concentrators were investigated to improve the understanding of SO2 formation and release during processing. The concentrates were heated in gases of various oxygen concentrations up to 1573 K (1300 °C) in a thermal gravimetric analysis unit to simulate what may take place during calcine collection and
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2022年2月11日 McDonald et al. treated a high iron–low nickel concentrate by pressure oxidation at 250 °C, and the extraction of base metals from such nickel sulfide concentrates is rapid. The ... the production of nickel increasingly depends on low-grade and refractory nickel oxide ore and nickel mixed ore.
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Nickel(II) oxide is the chemical compound with the formula NiO.It is the principal oxide of nickel. [4] It is classified as a basic metal oxide. Several million kilograms are produced annually of varying quality, mainly as an intermediate in the production of nickel alloys. [5] The mineralogical form of NiO, bunsenite, is very rare.Other nickel(III) oxides have been claimed, for example: Ni
More2013年11月8日 In the oxidation roasting stage, the iron species in the nickel concentrate was preferentially oxidized to form iron oxides, leaving non-ferrous metals (Ni, Cu, Co) as sulfides.
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2010年10月26日 This paper lists the 47 pyrometallurgical operations worldwide which are mainly dedicated to the production of class II nickel products (nickel oxide products and utility nickel), nickel matte, and granules. The theme of the nickel biography is to provide a full extractive metallurgy synopsis rather than the reader reviewing numerous authors.
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Sherritt Gordon Nickel Concentrate Treatment The Ni-Cu-Co flotation concentrate produced at Lynn Lake" contains 12 to 16 pct Ni, 1 to 2 pct Cu, 0.2 to 0.5 pct Co, 33 to 40 pct Fe, 28 to 34 pct S, 8 to 20 pct insoluble, and less than 0.02 oz per ton precious metals. The nickel is present chiefly as pentlandite, the
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