direct reduction of nickel

  • Direct Observation of Ni–Mo Bimetallic Catalyst Formation ...

    Direct Observation of Ni–Mo Bimetallic Catalyst Formation via Thermal Reduction of Nickel Molybdate Nanorods Rituja B. Patil Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh Pennsylvania 15261, United States

  • Direct photoactivation of a nickel-based, water-reduction ...

     · Direct photoactivation of a nickel-based, water-reduction photocathode by a highly conjugated supramolecular chromophore ... direct activation of the catalyst by the long-lived, RS excited state that minimizes the energy loss along the photoinduced electron transfer steps towards water reduction.

  • Pelletizing of nickel residue from laterite for direct ...

    Abstract Pelletizing and reduction tests for direct reduction process using nickel leaching residue were carried out. Green pellet showed sufficient compressive strength and drop resistance for handling without addition of bentonite. The compressive strength of fired pellet was greatly increased when a small amount of limestone was added and the maximum strength was achieved at a CaO/SiO2 ...

  • Nickel allergy

    In the workplace, exposure reduction includes personal protection equipment and other risk management measures. Effects. Nickel allergy results in a skin response (rash) after the skin comes in direct and sustained contact with any item that releases a large amount of free nickel from its surface.

  • Direct reduction of nickel catalyst with model bio ...

     · The direct reduction of 18 wt% nickel oxide steam reforming catalyst supported on α-alumina by reforming fuel acetic acid during a steam reforming process was investigated in . Steam reforming of acetic acid took place as soon as metallic Ni was produced from NiO reduction by the acetic acid. There are several materials-related parameters that ...

  • direct reduction of nickel ores in rotary kiln

    direct reduction of nickel ores in rotary kiln As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including quarry, aggregate, and different kinds of minerals.

  • E. coli Nickel‐Iron Hydrogenase 1 Catalyses Non‐native ...

     · A new activity for the [NiFe] uptake hydrogenase 1 of Escherichia coli (Hyd1) is presented. Direct reduction of biological flavin cofactors FMN and FAD is achieved using H 2 as a simple, completely atom-economical reductant. The robust nature of Hyd1 is exploited for flavin reduction across a broad range of temperatures (25–70 °C) and extended reaction times.

  • Mechanism of nickel-catalyzed direct carbonyl-Heck ...

    We present a detailed DFT mechanistic study on the first Ni-catalyzed direct carbonyl-Heck coupling of aryl triflates and aldehydes to afford ketones. The precatalyst Ni(COD)2 is activated with the phosphine (phos) ligand, followed by coordination of the substrate PhOTf, to form [Ni(phos)(PhOTf)] for intramo

  • Direct reduction and extraction of iron from nickel ...

    Aiming at the properties of Fe and SiO 2 in nickel slag, the process of preparing DRI by direct reduction nickel slag from coal base was proposed, and the component of gangue is used as raw material to prepare C 2 S(belite) and C 3...

  • Growth Characteristics of Metallic Iron Particles in the ...

     · The direct reduction method can extract metallic iron from the nickel slag effectively. When the reduction temperature is 1573 K and the reduction time is 60 minutes, the degree of metallization of the product can reach 91.89 pct. (2) Large quantities of metallic iron particles are produced in the direct reduction process of nickel slag.

  • Selective Reduction of Laterite Nickel Ore

    In laterite nickel processing by direct reduction, the challenges are to conduct selective reduction of nickel and to let iron unreduced. The addition of additive in the direct reduction process is needed to achieve this selective reduction. Additives used for the selective reduction includes Na 2 SO 4, MgCl 2, CaSO 4, NaCl and CaCl 2 ·H 2 O ...

  • Cyclohexyl Bromide and Iodide: Direct Reduction at ...

     · Direct reduction of 1 is a one-step process that affords a carbanion intermediate, ... Catalytic reduction of 1 and 2 by nickel(I) salen and cobalt(I) salen electrogenerated at glassy carbon cathodes in DMF-TMABF 4 has been investigated with the …

  • Recovery of iron and nickel from nickel laterite ore by ...

    By adding a flux and using a direct reduction roasting and magnetic separation method,iron and nickel enrichment from refractory low-grade nickel laterite ore,in which nickel is mainly contained in silicates,was studied tter technical indicators were obtained by adding the flux.The optimal conditions are coal as the reducer with a dosage of 15%,KD-2 as the flux with a dosage of 20%,and ...

  • Nickel processing

    Various processes are used to treat nickel matte. One process is the ammonia pressure leach, in which nickel is recovered from solution using hydrogen reduction, and the sulfur is recovered as ammonium sulfate for use as fertilizer another, the matte may be roasted to produce high-grade nickel oxides; these are subjected to a pressure leach, and the solution is electro- and carbonyl refined.

  • Direct Reduction of Limonitic Laterite Nickel Ore with ...

    The increasing demand for stainless steel and the scarcity of sulfide nickel ore affect the increase of laterite nickel ore processing. One of the processes that has been proven can be applied to process laterite nickel ore is direct reduction. In the direct reduction, the reduction atmosphere was adjusted by controlling the volume of CO and CO2 from carbon source materials, such as coal ...

  • Evolution of ferronickel particles during the reduction of ...

     · The method of producing ferronickel at low temperature (1250–1400°C) has been applied since the 1950s at Nippon Yakin Kogyo, Oheyama Works, Japan. Limestone was used as an additive to adjust the slag composition for lowering the slag melting point. The ferronickel product was recovered by means of a magnetic separator from semi-molten slag and metal after water quenching.

  • Direct Reduction of Nickel Laterites – Malachite Consult

     · Direct Reduction of Nickel Laterites. Malachite Consulting has undertaken testwork and engineering studies for the direct reduction of nickel laterites, followed by hydrometallurgical processing, in order to produce high value products for sale, such as battery grade nickel …

  • Direct Reduction of Aldoses and Ketoses by Raney Nickel ...

    Reactions of dinuclear metal carbonyl .alpha.-diimine complexes with alkynes. 8. Reactions of the homo- and heterodinuclear iron and ruthenium complexes M2(CO)6(N,N''-diisopropyl-1,4-diaza-1,3-butadiene) [M2 = Fe2, FeRu, Ru2] with (N,N-diethylamino)-1-propyne

  • Direct-Liquid-Injection Chemical Vapor Deposition of ...

    Smooth and continuous films of nickel nitride (NiNx) with excellent step coverage were deposited from a novel nickel amidinate precursor, Ni(MeC(NtBu)2)2, and either ammonia (NH3) or a mixture of NH3 and hydrogen (H2) gases as co-reactants. The reactants were injected together in direct-liquid-injection chemical vapor deposition (DLI-CVD) processes at substrate temperatures of 160−200 °C ...

  • Effects of direct reduction process on the microstructure ...

     · A coal-based direct reduction process was used to reduce the nickel laterite ore under a constant C: O ratio (1.2: 1) and reduction time (90 min). The effect of basicity and reduction temperature on microstructure and reduction characteristics and of carbon-bearing nickel laterite ore pellets was investigated.

  • Direct reduction of low grade nickel laterite ore to ...

     · In this study, low grade nickel laterite ore was processed by means of isothermal-temperature gradient method to produce ferronickel nugget. The ore and coal as reductant were ground to obtain the grain size of less than 0.25 mm and 0.425 mm, respectively. Both ground laterite ore and coal were mixed, agglomerated in the form of cylindrical pellet by using press machine and then reduced …

  • DIRECT REDUCTION AND EXTRACTION OF IRON FROM …

    The reduction roasting products of nickel slag with iron, C 3 S and C 2 S as the main phase were obtained by reasonable batching and tem-perature control technology of reduction roasting reaction. Keywords: direct reduction iron, extraction, nickel slag, calcium silicate, x-ray analysis INTRODUCTION Nickel slag is the industrial waste residue ...

  • Selective Reduction of Laterite Nickel Ore

    Keywords: laterite nickel ore, selective reduction, direct reduction, additives 1. Nickel ­ General Nickel is an important alloying metal with widerange application in the industry.1) Nickel is one of the most important strategic metals which is widely applied to stainless …

  • Atomic Layer Deposition of Nickel by the Reduction of ...

     · ALD of elementary metal by other than direct reduction was reported by Utriainen et al. for nickel deposition. 15 NiO films were formed by ALD, and then the deposited nickel oxide films were converted to metallic nickel film by heat-treatment at 230°C in 5/95% atmosphere. But the reduction step induced structural collapse, thus pinhole ...

  • Nickel

    Nickel is a silvery-white metal with a slight golden tinge that takes a high polish. It is one of only four elements that are magnetic at or near room temperature, the others being iron, cobalt and gadolinium s Curie temperature is 355 °C (671 °F), meaning that bulk nickel is non-magnetic above this temperature. The unit cell of nickel is a face-centered cube with the lattice parameter of ...

  • Synthesis of Nickel Nanoparticles Supported on Boehmite ...

     · Nickel nanoparticles supported on boehmite were prepared by a modified electroless nickel-plating method and a direct reduction method. We mainly studied the catalyst synthesized by the direct reduction method. The as-prepared nickel catalyst was characterized by X-ray diffraction and high-resolution transmission electron microscopy. The catalytic behavior in selective hydrogenation of …

  • Direct-Liquid-Injection Chemical Vapor Deposition of ...

     · Smooth and continuous films of nickel nitride (NiNx) with excellent step coverage were deposited from a novel nickel amidinate precursor, Ni(MeC(NtBu)2)2, and either ammonia (NH3) or a mixture of NH3 and hydrogen (H2) gases as co-reactants at 160−200 °C. The NiNx films could be reduced to pure nickel films by annealing in H2 at 160 °C or by hydrogen plasma treatment at room …

  • direct reduction of nickel ores in rotary kiln

    direct reduction nickel ore – Grinding Mill China. In the direct reduction of lateritic nickel ore by Rotary Kiln, we made great successes and have already done ... Request Quotation. Direct reduction of garnierite ore for production of ferro-nickel with a rotary kiln at Nippon Yakin Kogyo Co., Ltd., Oheyama Works. Tetsuya Watanabe, Request ...

  • Growth Characteristics of Metallic Iron Particles in the ...

    Abstract Coal-based direct reduction of nickel slag and magnetic separation of iron are effective methods of secondary resource utilization. The growth characteristics of metallic iron particles in this process are of great significance for subsequent grinding and magnetic separation process. The nickel slag is mixed with coal powder and other additives in a certain proportion, and then ...

  • Welcome to Altilium Group Ltd (formerly Direct Nickel ...

    The DNi Process TM. The global demand for nickel is rapidly increasing. The DNi Process TM is the only proven method of maximising mine revenue whilst also protecting the environment.. Our revolutionary process doubles the world''s nickel reserves sourced from lateric ore, and almost doubles the annual revenue of a laterite mine when compared to the ferro-nickel process.

  • Direct reduction of nickel catalyst with model bio ...

    The effects of temperature and S/C on the reduction extent and kinetics of a steam reforming NiO/α-Al₂O₃ catalyst were systematically investigated using five bio-compounds commonly produced during the fermentation, pyrolysis and gasification processes of biomass (acetic acid, ethanol, acetone, furfural and glucose). Reduction was also performed with methane and hydrogen for comparison.

  • The Reduction of Nickel Oxide by Hydrogen | Journal of the ...

    Direct and Highly Efficient Reduction of NiO into Ni with Cellulose under Hydrothermal Conditions. Industrial & Engineering Chemistry Research 2012, 51 (23) ... Kinetics of reduction of nickel oxide with helium–hydrogen gas mixtures in the range 300–400°C.

  • X-ray diffraction study of nickel oxide reduction by ...

     · 1.. IntroductionReduction of nickel oxide by H 2 (1) NiO + H 2 → Ni + H 2 O is irreversible, since the equilibrium constant, K p, varies from 10 3 to 10 2 in the temperature range 0–1000 °C, and the reaction is only slightly exothermic. Extensive studies on reaction (1) have appeared in the literature, due to its practical importance in the reduction of nickel ores and catalysts .

  • Direct Nickel Process – Breakthrough Technology

    Company among the lowest cash cost nickel producers in the next 5 years that are able to meet the growing global demand. Direct Nickel has developed a game changing pro cess for extracting nickel from laterite deposits. It will position Direct Nickel as one of the lowest cash cost producers in the global nickel industry in the next 5 years.

  • Reduction process of low-grade nickel laterite ...

    In direct reduction processes of iron ore and nickel, the Boudouard reaction is important because the gaseous reducing agent that is formed is CO (g). This can be seen in Figure 4, in which the formation of CO (g) and its stability is shown to occur above 1000 °C.

  • Direct Reduction of Limonitic Laterite Nickel Ore with ...

    Direct Reduction of Limonitic Laterite Nickel Ore with ...