pressure oxidation of nickel

    pressure oxidation of nickel

    On the high-temperature oxidation of nickel - ScienceDirect

    In this the high-temperature oxidation of Ni has been revisited. The experiments have been performed as a function of temperature in the range 5001300 °C and oxygen pressure from 1×10 −4 to 1 atm. The surface kinetics and oxidation kinetics have been investigated by mass spectroscopy and thermogravimetry and the oxide scales have

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    Sherritt International - Operations - Technologies

    High pressure acid leaching (HPAL) of nickel laterite Hydrogen reduction for the recovery of nickel and cobalt and for the production of specialty metal powders Pressure oxidation of refractory gold ores and concentrates Leaching of nickel-copper matte, including the concentration of

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    A study of oxidation kinetics of nickel metal in flowing

    A STUDY OF OXIDATION KINIQICS OF NICKEL METAL IN FLOWING AIR AND OXYGEN-NITROGEN MI-S By D. J. Progar and B. W. Lewis Langley Research Center A study was made of the oxidation kinetics of nickel metal sheet in flowing air and in oxygen-nitrogen mixtures of varying composition.The study covered the temperatures 1500° F, 17>0° F, 2000° F, 2250° F, and 2500° F and covered

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    Nickel Mining - Fluor Engineering, Procurement

    Pressure oxidation leaching; Reduction roast-ammonia leach; Smelting; and storage methods of nickel ore and nickel laterite ore. Skip to main content Turn on more accessible mode Search Query. Nickel. Home > Client Markets > Mining Metals > Mining > Nickel Nickel Fluor Mining Expertise. Fluor has considerable experience in the mining

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    The oxidation kinetics of thin nickel films between 250

    IntroductionExperimental MethodsResults and DiscussionAcknowledgementsThis manuscript is organized in the following way. First the defect chemical models of undoped and donor-doped NiO are described, and the oxidation theories are summarized. Then the experimental results on the oxidation of Ni films are presented, and the importance of grain boundary diffusion is shown. Attempts to accelerate the oxidation rate constant by Cr-doping and the difficulties of this approach are discussed.

    Nickel - Wikipedia

    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.Its 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 latt parameter of

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    Group: group 10

    Oxidation of nickel and transport properties of nickel oxide

    Oxidation kinetics of high purity nickel, as well as the nonstoichiometry and chemical diffusion in nickel oxide have been studied as a function of temperature (13731673 K) and oxygen pressure (1010 5 Pa) using microthermogravimetric techniques. In order to eliminate the possible participation of grain boundary diffusion in scale growth at lower temperatures, the oxidation rate

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    (PDF) On the high-temperature oxidation of nickel

    On the high-temperature oxidation of nickel. and water vapor pressure. Oxidation of metals in water vapor‐containing atmospheres at high temperature is accompanied by the formation of

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    pressure oxidation of nickel - jeveuxduvin

    Benefits of Using the Albion Process for a North Queensland Project pressure oxidation, bacterial oxidation and the Albion Process. Metals such as copper, nickel, zinc and gold may be recovered from ores or concentrates.

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    Analysis of Pressure Variations in a Low-Pressure Nickel

    May 15, 2012  A low pressure nickel-hydrogen battery using either a metal hydride or gaseous hydrogen for H 2 storage has been developed for use in implantable neuroprosthetic devs. In this , pressure variations inside the cell for the gaseous hydrogen version are analyzed and correlated with oxygen evolution side reaction at the end of charging, the recombination of oxygen with hydrogen

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    High Pressure Acid Leach Pressure Oxidation

    Uranium Nickel Gold Copper Cobalt Rare earths Zinc High Pressure Acid Leach (HPAL) and Pressure Oxidation (POX) testing servs provide a unique opportunity to evaluate and optimise the most economically viable process routes for the recovery of most metals such as nickel from lateritic ores and gold from refractory ores.

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    THE APPLICATION OF THE CESL NICKEL PROCESS TO

    Acid pressure leaching of laterite ores is quite different from oxidative pressure leaching of sulphide concentrates; autoclave conditions, oxidation requirements, solids handling and impurity levels vary considerably. In both cases, however, nickel and cobalt report to an impure solution, and must be recovered separately in purified forms.

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    High Pressure Acid Leach - calderaengineering

    High Pressure Acid Leach (HPAL) is a process used to extract nickel and cobalt from laterite ore bodies. The HPAL process utilizes elevated temperatures (roughly 255 degrees Celsius), elevated pressures (roughly 50 bar or 725 psi), and sulfuric acid to separate nickel and cobalt from the laterite ore.

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    Effect of Oxygen Pressure on Internal Oxidation of Nickel

    Abstract. The oxidation behavior of solid-solution nickel-aluminum alloys was studied at four levels of oxygen pressure ranging from a partial pressure of 10 −4 atmosphere to a total pressure of 10 atmospheres. Three such alloys containing 1.04, 3.90, and 6.40 atomic percent (a/o) Al were oxidized at 1000 C for times of 6.25, 25, and 100 hours.

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    Copper Pressure Leaching Process - Outotec

    Outotec® Copper Pressure Leaching Process. Get sustainable and economical copper recovery from copper sulfides with very high copper leach extractions. The Outotec copper pressure leaching process combines our highly effective pressure oxidation and leaching technology with world-renowned VSF solvent extraction and electrowinning technology.

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    Autoclave and Pressure Oxidation Mining and Minerals

    Pressure oxidation was developed for processing refractory ores where gold is occluded in the sulfide minerals, typically pyrite or arsenopyrite. Oxidation of the sulfides at elevated temperatures and pressures liberates the gold, allowing it to be economically recovered by conventional circuits.

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    Nickel - Element information, properties and uses

    Nickel resists corrosion and is used to plate other metals to protect them. It is, however, mainly used in making alloys such as stainless steel. Values are given for typical oxidation number and coordination. Electron affinity It is given by the ratio of the pressure on a body to the fractional decrease in volume. Vapour pressure.

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    41 SULFIDES FROM THE DULUTH GABBRO LEACHING OF

    THE PRESSURE OXIDATION LEACHING OF BULK COPPER-NICKEL SULFIDES FROM THE DULUTH GABBRO INTRODUCTION The copper-nickel bearing material in the Duluth Gabbro represent a potentially significant reserve of copper and nickel with lesser amounts of cobalt and platinum group elements (PGEs).

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    Characterization of oxide structures formed on nickel

    Abstract. Low pressure oxidation studies of Ni-18%Cr alloy were carried out at temperatures of 500600°C for very brief periods. Detailed XPS, AES, SEM, and TEM studies identified four stages in the initial oxidation.

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    Room-temerature oxidation of Ni(110) at low - SpringerLink

    Abstract. Oxidation of atomically clean (110) nickel single crystals has been studied at room temperature and in pure oxygen or air at pressures from 1×10 −9 torr to atmospheric. X-ray photoelectron (XPS) and Auger electron spectroscopic (AES) data indicate that the standard regimes of dissociative chemisorption, oxide nucleation, and oxide lateral growth to coalescence were observed at low

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    Nickel - Element information, properties and uses

    Nickel resists corrosion and is used to plate other metals to protect them. It is, however, mainly used in making alloys such as stainless steel. Values are given for typical oxidation number and coordination. Electron affinity It is given by the ratio of the pressure on a body to the fractional decrease in volume. Vapour pressure.

    More

    41 SULFIDES FROM THE DULUTH GABBRO LEACHING OF

    THE PRESSURE OXIDATION LEACHING OF BULK COPPER-NICKEL SULFIDES FROM THE DULUTH GABBRO INTRODUCTION The copper-nickel bearing material in the Duluth Gabbro represent a potentially significant reserve of copper and nickel with lesser amounts of cobalt and platinum group elements (PGEs).

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    Characterization of oxide structures formed on nickel

    Abstract. Low pressure oxidation studies of Ni-18%Cr alloy were carried out at temperatures of 500600°C for very brief periods. Detailed XPS, AES, SEM, and TEM studies identified four stages in the initial oxidation.

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    PLATSOLTM TREATMENT OF THE NORTHMET COPPER

    pressure oxidation (T ³200ºC) could dissolve copper and nickel. The fundamental difference between the PLATSOLTM process and conventional high temperature pressure oxidation is the addition of chloride ions to the autoclave feed. It was discovered that the addition of chloride at concentrations as low as ~3 g/L (5 g/L NaCl) resulted in

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    Autoclave Leaching of Copper Nickel Matte

    The matte was preleached at atmospheric pressure to selectively extract 20 pct of the nickel, and the undissolved solids were referred to as the matte residue. Autoclave leaching of the matte residue extracted over 95 pct of the nickel, copper, and iron. The remaining leach residue in the autoclave contained over 100 oz of precious metals per ton.

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    High-Pressure Leaching Hazen Research

    Examples of this include pressure oxidation (POX) of sulfide ores and concentrates, high-pressure acid leaching (HPAL) of nickel laterites, and wet-air oxidation of organics. Both batch and continuous reactors are availe at Hazen for developing high-temperature processes.

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    Lateritic nickel ore deposits - Wikipedia

    Nickel is extracted from the ore by a variety of process routes. Hydrometallurgical processes include high-pressure acid leach (HPAL) and heap leach, both of which are generally followed by solvent extraction - electrowinning for recovery of nickel. Another hydrometallurgical routes is the Caron process, which consists of roasting followed by

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    SGS MINERALS SERVICES T3 SGS 174 09-2013

    Pressure leaching is a well established hydrometallurgical processing alternative for gold, nickel, PGE and base metal ores. SGS has been active in this area since 1985, developing flowsheets and running integrated pilot plants in support of bankable fe asibility studies.

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    Room-temerature oxidation of Ni(110) at low - SpringerLink

    Abstract. Oxidation of atomically clean (110) nickel single crystals has been studied at room temperature and in pure oxygen or air at pressures from 1×10 −9 torr to atmospheric. X-ray photoelectron (XPS) and Auger electron spectroscopic (AES) data indicate that the standard regimes of dissociative chemisorption, oxide nucleation, and oxide lateral growth to coalescence were observed at low

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    Pressure Oxidation Process - Outotec

    Pressure Oxidation Process; Outotec® Pressure Oxidation Process. Get a comprehensive solution for refractory gold sulfide oxidation from one reliable supplier. The Outotec pressure oxidation process solution offers a sustainable and economical process in a complete pressure oxidation plant with a high level of automation and process control.

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    Oxidation of Copper Nickel alloy

    The air oxidation of a CuNi alloy wire has been shown to fit an Antione Vapor Pressure equation.The derived equation correctly predicts the lower limit for oxidation of Cu55Ni45 alloys is air (650 °C) and is an excellent predictor for the rate of oxidation of this alloy wire in air.

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    HIGH-TEMPERATURE CHARACTERISTICS OF STAINLESS STEELS

    is exposed. Generally, if oxidation or other forms of scaling are expected to be severe, a greater cross-sectional area beyond that indicated by mechanical-property requirements is usually specified. Problems like this cannot be solved by oratory analysis. It requires observation of

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    Nickel

    Nickel Compounds Nickel is known primarily for its divalent compounds since the most important oxidation state of the element is +2. There do exist however certain compounds in which the oxidation state of the metal is between -1 to +4. Blue and green are the characteristic colours of nickel compounds and they are often hydrated.

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    Characterization of Residue from the Pressure Oxidation

    To help promote the development of this resource, the Coleraine Minerals Research Laboratory (CMRL) has conducted a series of investigations into methods of processing the material. A bulk sulfide flotation process followed by oxidation pressure leaching resulted in high extractions (>98 %) of the copper and nickel in the flotation concentrate.

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    Oxidation of Copper Nickel alloy

    The air oxidation of a CuNi alloy wire has been shown to fit an Antione Vapor Pressure equation.The derived equation correctly predicts the lower limit for oxidation of Cu55Ni45 alloys is air (650 °C) and is an excellent predictor for the rate of oxidation of this alloy wire in air.

    More

    HIGH-TEMPERATURE CHARACTERISTICS OF STAINLESS STEELS

    is exposed. Generally, if oxidation or other forms of scaling are expected to be severe, a greater cross-sectional area beyond that indicated by mechanical-property requirements is usually specified. Problems like this cannot be solved by oratory analysis. It requires observation of

    More

    Nickel

    Nickel Compounds Nickel is known primarily for its divalent compounds since the most important oxidation state of the element is +2. There do exist however certain compounds in which the oxidation state of the metal is between -1 to +4. Blue and green are the characteristic colours of nickel compounds and they are often hydrated.

    More

    Characterization of Residue from the Pressure Oxidation

    To help promote the development of this resource, the Coleraine Minerals Research Laboratory (CMRL) has conducted a series of investigations into methods of processing the material. A bulk sulfide flotation process followed by oxidation pressure leaching resulted in high extractions (>98 %) of the copper and nickel in the flotation concentrate.

    More

    Contents Copper-nickel alloys, properties and applications

    nickel” refers in fact to copper-nickel-iron alloys. Chromium can be used to replace some of the iron content and at one per cent or more provides higher strength. It is used in a newly-developed 30% nickel casting alloy (IN-768).* A low-chromium 16% nickel wrought alloy (C72200)† has been developed in

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    US6171564B1 - Process for extraction of metal from an ore

    A process for the extraction of metal from an ore or concentrate which contains nickel and/or cobalt values and other metals, comprises subjecting the ore or concentrate to acid leaching under pressure at pH≦2 to obtain a liquor containing nickel and/or cobalt values, subjecting the liquor to a first precipitation stage at pH of about 5 to 6 to produce a solid containing non nickel and non

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    High Temperature Alloys, NITRONIC, INCONEL, HASTELLOY

    800H/HT is an iron-nickel-chromium alloy having the same basic composition as Alloy 800 but with significantly higher creep rupture strength. Exhibits excellent resistance to carburization, oxidation and nitriding atmospheres. The alloy is dual certified and combines

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    Nickel: smelting, producing-Metalpedia

    Nickel matte with a 70% nickel grade, procured from mines and smelters that we have a stake in, and mixed sulfide with a 60% nickel grade produced in Coral Bay, using the HPAL (High Pressure Acid Leach) process is used as raw material. Production Process of Electrolytic Nickel

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    Pressure Oxidation of Molybdenum Concentrates

    • Pressure oxidation uses either an acidic or alkaline leaching system with elevated temperatures and oxygen in order to create a reaction • Process used by Rio Tinto, ASARCO, and Freeport McMoRan

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    A History of Sherritt Fifty Years of Pressure

    Jan 14, 2009  Pressure oxidation of refractory gold ores finally came into its own in the 1980s as a healthy gold p encouraged the exploitation of refractory gold ore deposits (21). Sherritt has played a significant part in the commercialization of pressure oxidation for refractory gold ores.

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    HIGH TEMPERATURE OXIDATION OF METALS AND ALLOYS

    HIGH TEMPERATURE OXIDATION OF METALS AND ALLOYS 329 layers of the base metal oxide (Figure 6). The metal surface remains bright and clean while oxidation is occurring, in fact, within the base metal. The border of the Internal Oxidation Zone (IOZ) presents the reaction (oxidation) front. This is the position of the

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    发布:Metalurgija 2007:Ivan Anžel

    Self-Discharge Model of a Nickel-Hydrogen Cell

    equations for the self-discharge pressure profile of a nickel-hydro-gen cell and proposed that the hydrogen oxidation is a direct chem-ical reaction by measuring the heat generation rate of a nickel elec-trode in the hydrogen environment. Mao and White5 developed a mathematical model of a flooded nickel electrode in the hydrogen

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    发布:Journal of The Electrochemical Society 2000:B Wu Ralph E White从属关系: University of South Carolina关于:Self-discharge Energy storage Electrochemistry Chemical reaction Hydrogen Cur

    of Nickel - LibreTexts

    Nickel is known primarily for its divalent compounds since the most important oxidation state of the element is +2. There do exist however certain compounds in which the oxidation state of the metal is between -1 to +4. Blue and green are the characteristic colors of nickel

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    Pressure oxidation leaching of chalcopyrite

    May 01, 2007  Pressure oxidation leaching of chalcopyrite Pressure oxidation leaching of chalcopyrite McDonald, R.G.; Muir, D.M. 2007-05-01 00:00:00 Pressure oxidation reaction kinetics and products are compared for the recovery of copper from a chalcopyrite concentrate under medium temperature conditions at 125150 °C, as patented and promoted by various commercial operations,

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    发布:Hydrometallurgy 2007:R G Mcdonald D M Muir从属关系: Commonwealth Scientific and Industrial Research Organisation关于:Copper Nitrogen Partial oxidation X-ray crystallography Pressure oxidation Pulm