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Direct Reduction of Limonitic Laterite Nickel Ore

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 CO 2 from carbon source materials, such as coal, charcoal, and green cokes. This research aims to analyze the effect of reducing agents type on nickel limonitic nickel briquettes on Ni and Fe content

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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 at ...

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The Direct Nickel Process :: Total Materia Article

Using nitric acid as a leaching agent the direct nickel process can treat all types of nickel ore and produces a single flow sheet for a number of final saleable products. As an atmospheric hydrometallurgical process the direct nickel process has an impressive recycle and return statistic meaning 95%+ of the nitric acid is re-used, therefore providing good environmental incentive.

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The Direct Nickel Process :: Total Materia Article

The Direct Nickel Process DNi is an atmospheric hydrometallurgical processing route designed to treat all types of nickel laterite ores, in a single flow sheet to produce a number of final saleable products. The key to the Process is the use of nitric acid as the leaching agent and the subsequent use of a patented recovery and recycling process returning +95% of the nitric acid for re-use. See ...

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Effects of direct reduction process on the

Abstract A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated. The results show that the metallization rate of iron and the compressive strength of ...

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Direct reduction of garnierite ore for production

01.05.1987  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. In 1952, we switched the raw

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Study of selective reduction in lateritic nickel ore ...

21.01.2021  The selective reduction process in lateritic nickel ore is carried out to generate high nickel grade in concentrate by inhibiting the metallization of iron. Temperature reduction has a very important role in the reduction process of lateritic nickel ore, which will affect the reduction rate of metal oxide, both for nickel and iron .

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Enhanced methods for nickel recovery from low

Concentrating the nickel ores usually takes place close to the mine site, and involves chemical and physical processes to crush the ore and separate the nickel-bearing and gangue minerals. Mining nickel directly is the obvious route to obtaining pure nickel, however, nickel can also be recovered as a byproduct of other metals.

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Welcome to Altilium Group Ltd (formerly Direct

The DNi Process™ involves the leaching of ore at atmospheric pressure and a temperature of around 110°C. It produces the same two core products as an HPAL plant (nickel hydroxide and cobalt hydroxide in an MHP) but does not involve the high pressures nor temperatures that HPAL requires.

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Direct reduced iron - Wikipedia

The direct reduction process uses pelletized iron ore or natural "lump" ore. One exception is the fluidized bed process which requires sized iron ore particles. The direct reduction process can use natural gas contaminated with inert gases, avoiding the need to remove these gases for other use. However, any inert gas contamination of the reducing gas lowers the effect (quality) of that gas stream and the

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Direct reduction of low grade nickel laterite

Direct reduction of low grade nickel laterite ore to produce ferronickel using isothermal – temperature gradient

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Direct reduction of low grade nickel laterite ore

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 at temperature

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Direct Reduction of Limonitic Laterite Nickel

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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Effects of direct reduction process on the

Abstract A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated. The results show that the metallization rate of iron and the compressive strength of ...

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DRI, nickel and iron ores - Gard

The dangers of carrying Direct Reduced Iron (DRI)..... 11 Information required when offered a shipment of Iron fines that may contain DRI (C) ................ 12 Liquefaction of unprocessed mineral ores - Iron ore fines and nickel ore...................................... 14

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Two-stage reduction for the preparation of ferronickel ...

nickel laterite ores, and many approaches have been pre-sented. Pyrometallurgical processes include pre-reduction– smelting [1], direct reduction [2–3], semi-molten state re-duction [4], and coal-based self-reduction [5], whereas hy-drometallurgical processes include the Caron process [6], reduction roast leaching [7–8], atmospheric and high

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Enhanced methods for nickel recovery from low

Concentrating the nickel ores usually takes place close to the mine site, and involves chemical and physical processes to crush the ore and separate the nickel-bearing and gangue minerals. Mining nickel directly is the obvious route to obtaining pure nickel, however, nickel can also be recovered as a byproduct of other metals.

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direct reduction of garnierite ore for production

Direct reduction of garnierite ore for production of ferro-nickel with a rotary kiln at Nippon Yakin Kogyo Co., Ltd., Oheyama Works Original Research Article » More detailed T.

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Modelling and optimization of a rotary kiln direct ...

applications including 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, among others: feed

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Operational results of the Circored fine ore

They can be used in the direct reduction of iron ores to produce a feed for steelmaking, in the reduction of manganese dioxide to produce a lesser oxide for feeding to smelters, in the preheating ...

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Effects of direct reduction process on the

Abstract A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated. The results show that the metallization rate of iron and the compressive strength of ...

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Reductive roasting of nickel laterite ore with

The selective reduction of nickel and adequate growth of ferronickel grains are imperative for efficient preparation of ferronickel from nickeliferous laterite ore via the process of direct reduction followed by magnetic separation. In Part I, reduction/sulfidation behaviors of a saprolitic laterite ore in the presence of sodium sulfate were investigated, with an emphasis on thermodynamic ...

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Nickel - Wikipedia

Nickel is obtained through extractive metallurgy: it is extracted from the ore by conventional roasting and reduction processes that yield a metal of greater than 75% purity. In many stainless steel applications, 75% pure nickel can be used without further purification, depending on the impurities.

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Nickel Outlook 2021: Strong Demand Recovery

Nickel started the year trading at US$14,070 per tonne, but plummeted to US$11,055 by March, when markets started to feel the impact of coronavirus containment measures and lockdowns.

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Experimental Study on Reduction-Magnetic

Download Citation Experimental Study on Reduction-Magnetic Separation Process of Low-Grade Nickel Laterite Ore The reduction and magnetic separation of low-grade nickel

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Production of ferro-nickel granules from nickel

Ferro-nickel granules were produced from nickel laterite ore/coal composite briquettes by high-temperature direct reduction.The effects of roasting temperature,roasting time,C/O(carbon/oxygen) molar ratio and flux amount on the grades and recovery rates of nickel and iron as well as on the quality of ferro-nickel granules were studied.The grades of nickel and total iron in the granules are 9.4 ...

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Lateritic nickel ore deposits - Wikipedia

The ore is stacked on impermeable plastic membranes and acid is percolated over the heap, generally for 3 to 4 months, at which stage 60% to 70% of the nickel-cobalt content is liberated into acid solution, which is then neutralised with limestone and a nickel-cobalt hydroxide intermediate product is generated, generally then sent to a smelter for refining.

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Operational results of the Circored fine ore

They can be used in the direct reduction of iron ores to produce a feed for steelmaking, in the reduction of manganese dioxide to produce a lesser oxide for feeding to smelters, in the preheating...

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Hot Briquetted Iron (HBI) International Iron

Ore-based metallics - merchant pig iron (MPI), direct reduced iron (DRI), hot briquetted iron (HBI), granulated pig iron (GPI) - are value-adding feedstock materials for the iron steel and ferrous casting industries and IIMA has as its principal objective their promotion through product and market support, innovation, education and regulatory support.

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Home - Midrex Technologies, Inc.

The MIDREX® Process – The world’s most reliable and productive direct reduction ironmaking technology. Midrex Process . Project Development. Your partner for contracting to commissioning direct reduced iron plants. Project Development . Midrex Global Solutions. Aftermarket group dedicated to continual support of your MIDREX® Plant . Global Solutions . Direct From Midrex. ArcelorMittal ...

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Nickel processing - Extraction and refining

Nickel processing - Nickel processing - Extraction and refining: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel ...

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Nickel: smelting, producing-Metalpedia

Nickel: smelting; 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 many stainless steel applications, 75% pure nickel can be used without further purification, depending on the composition of the impurities.

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Study of Nickeliferrous Laterite Reduction

Laterite is an important resource for the production of nickel. Pre-reduction of laterite is a critical step for all laterite based nickel production processes. The main kinds oflaterite, limonitic and serpentinic ore, behave differently upon reduction. Inthis study, general knowledge of laterites and nickel production were introduced. Research on laterite pre-reductionwas reviewed. Using the ...

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Experiment Research on Desulphurization during

Ferro-nickel nuggets were produced by high temperature reduction and melting of composite pellets prepared with laterite nickel ore as raw material and addition of reductant,flux and additive.The desulfuration mechanism in the process of ferro-nickel nuggets production was investigated.Simultaneously,the influences of experimental temperature and time as well as dosages

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Production of Direct Reduced Iron in Rotary

Current State in Iron ProductionThe world’s first commercial RHF, with a diameter of 16.7 m, was built by the company INMETCO in Elwood (in the U.S.) for recycling wastes containing nickel, chromium, and iron. The Direct Reduced Iron unit has a capacity of 200,000 tons a year and was built in 1997.[5]The company Iron Dynamics Inc ...

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Home - Midrex Technologies, Inc.

The MIDREX® Process – The world’s most reliable and productive direct reduction ironmaking technology. Midrex Process . Project Development. Your partner for contracting to commissioning direct reduced iron plants. Project Development . Midrex Global Solutions. Aftermarket group dedicated to continual support of your MIDREX® Plant . Global Solutions . Direct From Midrex. ArcelorMittal ...

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Liberty Steel to install EAFs, DRI module to make

Liberty Steel plans to replace the basic oxygen furnace (BOF) at its Galati plant in Romania with two electric-arc furnaces (EAFs), with the aim of becoming carbon-neutral by

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PLASMA SMELTING OF UNCONVENTIONAL ORES AND MINE RESIDUES ...

ore that do not fit easily into a traditional processing flowsheet, e.g. because the refractory nature of their minerology or the combination of valuable metals is less suitable for traditional processes. Nevertheless, these potential sources of valuable metals remain unexploited resources that have attracted growing interest in the metals and mining industries over recent years. The challenge ...

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A Pilot‐Plant Scale Test of Coal‐Based Rotary Kiln

A Pilot‐Plant Scale Test of Coal‐Based Rotary Kiln Direct Reduction of Laterite Ore for Fe‐Ni Production. Guanghui Li. Search for more papers by this author. Junhao Liu. Search for more papers by this author. Mingjun Rao. E-mail address: [email protected] Search for more papers by this author. Jun Luo . Search for more papers by this author. Changgen Wang. Search for more papers by ...

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Nickel Laterites: The World’s Largest Source of

30.03.2021  Middle grade Ni deposits contain more than 1.5% Ni and high grade Ni deposits are greater than 1.8%. Ore Minerals A sample of Garnierite, a mixture of nickel bearing minerals. CC. As the original nickel bearing rock weathers into a soil, the nickel finds its way into multiple minerals throughout the weathered profile. The source of the nickel is typically from the mineral olivine (Iron ...

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