— The investigated carbothermic reduction roasting followed by NH 4 OH–(NH 4) 2 CO 3 leaching of a nickeliferous laterite ore from Bajaur reserves has shown good …

 — 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 …

 — Nickel oxides are converted into easily leached metallic nickel by reduction roasting. • Over 98% Ni and 96% Co can be extracted from nickel alloy after reduction roasting. • Nickel oxide passivation films limit extraction of nickel from secondary resources. • The reduction roasting process is optimized by response surface methodology (RSM)

 — Preparation of LiFePO 4 /C cathode material by extracting Fe 2 O 3 from laterite nickel ore by ammonium jarosite method. Author links open overlay panel Longjiao Chang a b c, Anlu Wei a b, Shaohua Luo c d, ... Kinetics study on non-isothermal carbothermic reduction of nickel laterite ore in presence of Na 2 SO 4. Powder …

 — The reduction in the serpentine content from 66 pct (wt pct) to 1 wt pct in NCP ore indicates that nearly all of the nickel associated with this phase was extracted. There was also no unreacted NiO, CoO or MgO as their oxides or associated with unreacted serpentine detected in the solid residue after the sulfation-roasting-leaching …

In general, nickel can be extracted from its ores using smelting, high pressure acid leaching (HPAL) and Caron roast/leach processes. The Caron process, which involves reduction roasting of the ore followed by ammonia leaching of reduced ore, is one of the ways in which nickel laterite can be treated.

 — Nickel and cobalt were extracted from low-grade nickeliferous laterite ore using a reduction roasting-ammonia leaching method. The reduction roasting-ammonia leaching experimental tests were chiefly introduced, by which fine coal was used as a reductant. The results show that the optimum process conditions are confirmed as …

 — The process consists of reducing the ore with hydrogen, extracting of iron and nickel in the form of volatile metal carbonyls, separating the metal carbonyls and …

 — Nickel can be extracted directly from its ore by reduction by hydrogen or carbon monoxide at elevated temperature at $600 mat{^circ C}$ to $650 …

Metal ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them. The method used to extract a given metal from its ore ...

 — Introduction. Nickel is one of the metals with extremely high strategic value in the development of national economy. Nickel has attracted continuous attentions owing to its superior performances such as good ductility, corrosion resistance, high-temperature resistance, and high strength, which have been considered as an essential basic …

 — Hydrometallurgical processes involve the use of aqueous solutions and chemical reactions to extract nickel from the ore. The two primary hydrometallurgical methods used for nickel extraction are: 1) High-Pressure Acid Leaching (HPAL): HPAL is a widely used method for extracting nickel from laterite ores, which are low-grade and high …

 — However, extracting nickel from laterite ores differs from sulfides because nickel contained minerals are generally disseminated throughout the ore. Laterites cannot be concentrated using classic mineral processing techniques such as flotation. ... Mechanism of sodium sulfate in promoting selective reduction of nickel laterite ore during ...

 — 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...

 — 1. Introduction. Over the past 30 years laterite ores have become increasingly more important as a source of nickel metal (Dalvi et al., 2004).Several methods of nickel extraction from laterite ores have been piloted and some were put into full operation, including acid leach with sulphuric, nitric and hydrochloric acids, ammonia leach and the …

 — The volume of leaching residues generated exceeds 1 ton per ton of treated nickel ore (on a dry basis), due to the extraction of small quantities of nickel and cobalt as well as the addition of lime to neutralize the tailings [7]. Consequently, the amount of tailings to be managed is comparable to that of the mined nickel ore, necessitating a ...

 — Laterite ores account for >60% of the world's nickel resources. This ore contains considerable amount of scandium, a strategic material in increasingly high demand in various industries.Here, an innovative two-step process was developed in which scandium is first concentrated in a slag phase using carbothermic reduction and then is …

Selective reduction · Fractional factorial design 1 Introduction Nickel laterites ore is commonly found and mined in tropical countries like Indonesia, the Philippines, and Cuba. These ore deposits account for 73% of the world's nickel resources and 40% of nickel production. Such ore deposits occur in three layers: limo-

 — High-pressure acid leach (HPAL) residue from laterite nickel ore is a potentially valuable resource for ironmaking; however, its efficient utilization is hindered by its high sulfur content. In this study, an effective and straightforward method is proposed for sulfur removal from HPAL residue. The process involves sieving and sodium carbonate …

Ask the Chatbot a Question Ask the Chatbot a Question zinc processing, the extraction of zinc from its ores and the preparation of zinc metal or chemical compounds for use in various products.. Zinc (Zn) is a metallic element of hexagonal close-packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate …

 — Nickel can be extracted directly from its ore by reduction by hydrogen or carbon monoxide at elevated temperature at $600 mat{^circ C}$ to $650 mat{^circ C}$: $$ce{NiO + H2 -> Ni + H2O}$$ $$ce{NiO + CO -> Ni + CO2}$$ Also, it can be extracted by treatment with dilute sulfuric acid following by precipitation:

 — 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 …

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 …

 — The total nickel reserves in the world are estimated to be approximately 89 million tons, of which 60% corresponds to laterites ore deposits and 40% to sulphide ore deposits (Alvial-Hein et al., 2021, Meshram et al., 2019).In recent years, high grade nickel sulfide ore is gradually exhausted due to excessive mining, while low grade laterite …

Nickel extraction from hazardous waste by sulphuric acid leaching has been investigated. This study was performed to assess the effects of different parameters such as reaction time, acid concentrations, solid-liquid ratio, particle size, stirring speed and reaction temperature on nickel extraction from zinc plant residue, with the aim of recycling this …

 — Reduction roasting–magnetic separation technology has been extensively applied to the extraction of nickel from laterite nickel ores with low nickel content due to its short process flow, low energy consumption, and minimal influence on the environment (Zhang et al., 2020, Zhu et al., 2019).

 — This page looks at the various factors which influence the choice of method for extracting metals from their ores, including reduction by carbon, reduction by a …

DOI: 10.1016/j.mineng.2023.108194 Corpus ID: 259620999; Extraction of ferronickel concentrate from laterite nickel ore by reduction roasting-magnetic separation using spent cathode carbon

 — A characteristic feature of serpentine oxidized nickel ores (ONO) of the Serov deposit (≈ 1 wt.% Ni) is the increased content of iron and magnesium. The main nickel-containing phases are lizardite, antigorite, clinochlore and iron oxides with the nickel content varying from 1.6 to 9.2 wt.%.Heap (percolation) leaching with aqueous H2SO4 …

 — The extraction of Ni from sulfide ores is much simpler relative to laterites and is dominated by pyrometallurgical processing. This typically involves comminution and flotation to produce a nickel ...