• Laterite Ore

    The laterite ore is dried and reduction roasted in multihearth roasters in an atmosphere containing hydrogen and carbon monoxide in the absence of air. Nickel and cobalt are selectively reduced to the metallic form and thus rendered amenable to ammoniacal leaching, while iron remains as insoluble oxides and silicates.

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  • 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.

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  • Ring Formation in the Smelting of Saprolite Ni-ore in a ...

    nickel, which is mostly used as a nickel source for stainless steel. The calcination to around 1000°C by the rotary kiln provides drying and pre-reduction of ores, the calcinated product being subsequently charged into the electric furnace to be melt reduced. The slag and metal are tapped at around 1600 and 1400°C, respectively. On the other ...

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  • Nickel Furnace, Rotary Kiln Incinator Furnace In Nickel ...

    Following the Fujian Ding Nickel Roasting and Reduction Project, four sets of new nickel Roasting and Reducing Rotary Kilns were signed, with a total contract of more than 70 million yuan. The Rotary Kiln was used to smelt laterite nickel ore to produce nickel pig iron.

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  • Modelling and optimization of a rotary kiln direct ...

    ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables covering, amongst others: feed properties and rates, combustion options, kiln

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  • Lateriate-nickel ore rotary kiln

    Lateriate-nickel ore rotary kiln- cement production Rotary Kilns

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  • Selective reduction of nickel laterite ores

    The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. A process for extracting nonferrous metals from nickel laterite ore by a selective reduction treatment that causes the nonferrous metal oxide components of the ore to be reduced but effects substantially only partial reduction of the iron oxide components, and a subsequent ...

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  • Major Mines & Projects | Sorowako Mine

    The pyrometallurgy nickel processing involves in initial mineralisation drying process, followed by reduction, smelting and converting to produce the final dried product. Drying - Wet mineralisation from the Wet Ore Stockpile is fed to three rotary kiln dryers.

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  • Separation and recovery of iron and nickel from low-grade ...

     · The current pyrometallurgical methods have been exploited for processing nickel metal from low-grade laterite ore, such as in the metallic reduction roasting-magnetic separation process (Krupp-Renn Process),,,,,,, rotary kiln-electric furnace (RKEF) process,,,, and sintering-blast furnace . The RKEF process is characterized by ...

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  • Carbothermic Reduction of Nickeliferous Laterite Ores for ...

     · The RKEF process is a two-stage pyrometallurgical process that involves the calcination and the partial reduction of the saprolite ore in a rotary kiln, followed by high-temperature smelting in an electric arc furnace.26 The final product is a ferronickel alloy containing 20 wt.% to 40 wt.% nickel. It is uneconomic to process laterite ore with ...

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  • Preparation of ferronickel from nickel laterite via coal ...

     · The sticking phenomenon between molten slag and refractory is one of the crucial problems when preparing ferronickel from laterite ore using rotary hearth furnace or rotary kiln processes. This study aims to ameliorate sticking problems by using silicon dioxide (SiO2) to adjust the melting degree of the briquette during reduction roasting.

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  • The Best Mining Equipment for Philippines Nickel Ore You ...

     · From a global perspective, the Pre-reduction of Rotary Kiln &Electric Furnace Reduction is still in a dominant position in the development of laterite nickel mines. Get Latest Price of ALL Machines In which fields nickel ore is widely used?

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  • 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 ...

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  • Selective Reduction of Laterite Nickel Ore

    to 1300°C, the phase of saprolitic nickel ore changes into a complex mineral. The mineral is dominated by olivine (Mg 0.5Fe 0.5) 2SiO 4. 29) 2.3 Direct reduction of laterite nickel ore in industrial scale Most laterite nickel ore processing is carried out using Elkem process. The Elkem process uses Rotary Kiln …

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  • Reduction roasting and bioleaching of a limonite ore ...

     · The experimental set-up comprised the reduction of a nickel limonitic ore with hydrogen gas in a rotary kiln, at 900 °C, until all the goethite was converted to metallic iron. Subsequently, the reduced sample was bioleached by mesophilic microorganisms grown on Fe 2+ ( Acidithiobacillus ferrooxidans ) at 5% solids, 32 °C, and pH < 3.

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  • (PDF) Mathematical Modeling of Nickel Ores Pre-Reduction ...

    Mathematical Modeling of Nickel Ores Pre-Reduction Simulations in Laboratory Rotary Kiln ''''Linder" Zarife Gashi, Ibrahim Gashi & Mursel Rama, 2013 Iaset Us

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  • nickel and iron ore processing kiln smelter

    nickel and iron ore processing kiln smelter. This process can produce any nickel content in any nickel iron nickel grade ore, iron reduction rate control technology is in the stage of rotary kiln to achieve nickel all reduced to metal and iron partially reduced into metal and low oxide, this is the biggest feature of this process, but also its vitality the reason, but because of the

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  • The Effect of Sulfur in Rotary Kiln Fuels on Nickel ...

    The calcination-partial reduction experiments were conducted in a furnace at 900 oC for a 2-hour residence time. Various reducing gas mixtures representing combustion product of rotary kiln fuels (i.e., coal) were contacted with the ore. The sulfur content of the resulting calcines were measured by ICP-AES analysis. At constant P CO

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  • CN101701275B

    The invention relates to a method for preparing nickel iron by using a rotary kiln for directly reducing nickel silicate ores. The method comprises the steps of breaking the raw ores, placing in a drying kiln for drying, grinding into powder, adding 1-5% of fluoride, 5-20% of calcium oxide or 10-30% of limestone, 0.1%-0.5% of copper chloride, 10-25% of iron oxide and 5-20% of coke with the ...

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  • MATHEMATICAL MODELING OF NICKEL ORES PRE …

    problem in the process of obtaining nickel. In order to determine the factors that affect the pre-reduction degree''s increase of Smelter''s nickel ores, we have realized simulations of industrial cases for some temperatures in rotary kiln laboratory "Linder" in Macedonia.

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  • Sulphur Emission Reduction

    Nickel production process consists of several steps. It starts from ore mining, ore drying; ore reduction (kiln); smelting process; and converting process. Sulphur is required for the chemical reaction in the smelting process to get nickel with 26% purity which is then delivered to …

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  • Modelling and optimization of a rotary kiln direct ...

    In the case of a generic iron-ore reduction kiln, Table I provides an overview of the parameters (and ranges) that are considered. Table I. Model inputs used in the evaluation of kiln performance Design parameters Values Kiln internal diameter 4.34 m Kiln length 80 m Kiln …

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  • Metallurgical and Market Acceptance Test Work

    Blending Decar concentrate with saprolite ore in a kiln reduction/calcine smelting processing sequence. This is a process configuration currently in use in a variety of ferronickel plants around the world. ... Nickel recoveries, ranging from 94% to more than 99%, met or exceeded targets in all but one test, and iron recoveries at 31% to 46% ...

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  • ROTARY KILN REDUCTION OF LIMONITIC ORES

    Directed to the reduction of nickel-containing lateritic ores in a rotary kiln at high production rates to achieve selective reduction of nickel contained in the ore wherein the ore is preheated to at least about 1,000° F. in a preheating zone in the kiln and is maintained at at least this temperature while it travels through the reduction zone and wherein within the reduction zone the ...

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  • CN102168157B

    The invention relates to a method for reducing nickel ore by using a reducing rotary kiln and producing ferronickel by rusting an electric furnace. The production method comprises the processes of: preparing raw materials, directly reducing via the rotary kiln, cooling via a cooling kiln, selecting, rusting, and smelting by the electric furnace.

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  • Kinetic Studies of the Reduction of Limonitic Nickel Ore ...

     · Reduction Tests. Reduction tests were carried out in a rotary kiln (20 rpm). The tests were run at different temperatures (400 °C < T < 800 °C) using 5 g of sample. The gas-phase flow rate was fixed using a mass flowmeter and the reducing gas used was H 2 at a flow rate of 10 L/min. After the reduction tests the samples were naturally cooled in the oven for 3 h using N 2 at a flow rate of ...

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  • Direct reduction of garnierite ore for production of ferro ...

     · Direct reduction of garnierits ore for production of ferro-nickel with a rotary kiln at Nippon Yakin Kogyo Co., Ltd., Oheyama Works. Int. J. Miner. Process., 19: 173-187. During World War II, the Nippon Yakin Kogyo Co., Ltd. produced sponge iron with the Krupp- Renn process at the OheyAmA Works from laterite ore mined at the nearby OheyRma Mine.

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  • (PDF) Mathematical Modeling of Nickel Ores Pre-Reduction ...

    In the context of this paper are presented the results of the research dependence of mineralogical and metallurgical parameters determining the degree of pre-reduction of nickel ores, during simulation laboratory furnace "Linder", according to the

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  • Nickel Ore Rotary Kiln Calcination

    THE PRE-REDUCTION AND CALCINATION PROCESS OF LATERITE ORE ... Title: THE PRE-REDUCTION AND CALCINATION PROCESS OF LATERITE ORE IN ROTARY KILN, Summary: There has been a major breakthrough in the nickel ...

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  • direct reduction of nickel ores in rotary kiln

    Direct reduction of iron ore from tunnel kiln process ... reduction in tunel kin and rotary kiln ... laterite nickel ore sponge iron) tunnel kiln ... Request Quotation. direct reduction of iron ore from tunnel kiln process. Page Total Visitors:42365 Resolved Problem:2819 ... Direct reduction ... tunnel kiln, rotary kiln…

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  • Behavior of Reduction and Growth of Metal in Smelting of ...

    Behavior of Reduction and Growth of Metal in Smelting of Saprolite Ni-ore in a Rotary Kiln for Production of Ferro-nickel Alloy Hitoshi TSUJI Previous Manufacturing Department, Nippon Yakin Kogyo Co., Ltd., Oheyama Works, 606-1 Shimoyamada, Yosano-cho, Yoza-gun, Kyoto, 629-2302 Japan. E-mail: [email protected]

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  • Separation and Recovery of Iron and Nickel from Low-Grade ...

     · The low-grade nickel laterite ore used in this study was successfully upgraded through selective reduction by industrialized rotary kilns followed by magnetic separation. The results indicated that both iron metallization extent and nickel metallization extent showed obvious linear correlation. In addition, rational roasting temperature and prolonged grinding time could enhance the overall ...

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  • Processing of Nickel Laterite Ores on the Rise

    Preliminary Reduction. Once ore has been dried, it is processed in a large-scale rotary kiln to remove chemically bound moisture, as well as the oxide component of the ore. This step is often referred to as pre-reduction. Reduction & Smelting. Nickel is further reduced and smelted in an electric furnace.

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  • Behavior of Reduction and Growth of Metal in Smelting of ...

    The sampling of raw materials in the rotary kiln, firing experiment by the experimental kiln, and water quenching experiment have been performed, and the clarification of behavior of the reduction and the growth of metal has been attempted by SEM-EDS. In the amorphous serpentine region, NiO has very high reducibility than FeO. The increase in heating temperature above 1 273 K allows the fine ...

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  • A brief discussion on the smelting process of nickel iron ...

    (2) technology of ore, limestone, reducing agent in the field, to raw material preparation between screening and crushing, mixing the ingredients into the rotary kiln, rotary kiln, raw material drying, roasting and reduction of nickel slag, made about 1000 DEG C, the rotary kiln flue gas waste heat boiler, dust removal, devulcanization after ...

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