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Based on a brief introduction of properties of metallic nickel, it summarizes the applications of nickel, demand of nickel, resources of nickel, and metallurgical …
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The utility model provides a rotary kiln for producing ferronickel from Indonesia Sulawesi nickel laterite ore through RKEF technical processing. The rotary kiln comprises a kiln body and a bracket provided with riding wheels to support the kiln body, wherein a drive and transmission device enabling the kiln body to rotate on the riding wheels is …
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The treatment of laterites has been a research hotspot in extractive metallurgy over the past decades. Industrially, the pyrometallurgical treatment of laterites is mostly accomplished with a well-established method, namely, the rotary kiln–electric arc furnace (RKEF) process, which includes three main operations—calcination, prereduction, and …
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Primary world nickel production in 2020 was 2430.7 kt Ni; 69% (1677.7 kt) of them came from oxidized nickel ores (laterites) and 31% from sulfides. Production-wise, 87.7% of the 1677.7 kt came from pyrometallurgical …
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The primary pyrometallurgical route to produce ferronickel from laterite nickel ores is the Rotary Kiln-Electric Furnace (RKEF) process. In the RKEF process, …
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Rotary Kiln - Electric Furnace (RKEF) process is the most commonly used pyrometallurgical technique for processing nickel laterite ores and is mainly suited for saprolite deposits.
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The low-grade nickel laterite ore used in this study was successfully upgraded through selective reduction by industrialized rotary kilns followed by magnetic separation.
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DOI: 10.1016/J.JMRT.2020.08.036 Corpus ID: 225020166; Separation and recovery of iron and nickel from low-grade laterite nickel ore by microwave carbothermic reduction roasting
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Nickel laterite ore with 7.88 wt% coal, 12 wt% calcium sulphate reduced at 1200 °C for 30 min, a ferronickel concentrate of Ni 8.08 wt%, and Fe 79.98 wt% was obtained at a nickel and iron ...
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The laterite nickel rotary kiln cylinder is a heated rotating part, which is made of high-quality carbon steel plate, and the cylinder is supported on the rotating device by the kiln tyre, and is provided Mechanical or hydraulic thrust wheel on one or several gear supporting devices to control the axial swaying of the cylinder. 3. The ...
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The primary pyrometallurgical route to produce ferronickel from laterite nickel ores is the Rotary Kiln-Electric Furnace (RKEF) process. In the RKEF process, minerals undergo...
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Low-grade saprolite nickel laterite, characterized by complicated minerals composition and fine-grained and complex dissemination, was commonly treated with a low recovery efficiency of Ni and Fe by conventional methods. Hence, an improved direct reduction and magnetic separation process was proposed. ... At present, rotary kiln …
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The primary pyrometallurgical route to produce ferronickel from laterite nickel ores is the Rotary Kiln-Electric Furnace (RKEF) process. In the RKEF process, minerals undergo calcination and ...
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Rotary Kiln - Electric Furnace (RKEF) process is the most commonly used pyrometallurgical technique for processing nickel laterite ores and is mainly suited for …
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Rotary kiln-electric furnace (RKEF) technology accounts for 95 pct of the lateritic nickel ore processing. Coal is commonly used as fuel and reducing agent in the rotary kiln to produce solid reduction product which is then melted in the electric furnace. The use of coal in the process leads to the emission of approximately 70 tons of CO2 for …
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The rotary kiln was 5.27 m long, with an internal diameter of 410 mm, and two different feeds of inert standard commercial gravel were used in the runs, with the kiln operating in counter-current operation. ... Large- and Particle-Scale energy assessment of reduction roasting of nickel laterite ore for Ferronickel production via the rotary Kiln ...
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The magnetic separation efficiency of nickel from the laterite ore was evaluated using the recovery ratio of nickel R ni using the formula: (1) R Ni = m Ni × β Ni M Ni × γ Ni × 100 % where m Ni is the mass of the magnetic product, g; β Ni is the nickel content in the magnetic product, wt.%; M Ni is the mass of the reduction product, g ...
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How to reduce the energy consumption of the rotary kiln-electric furnace (RKEF) process has become an important issue for the stainless steel industry. The aim of this study is to reduce the energy consumption of ferronickel production from saprolite nickel laterite in the RKEF process. The effects of the slag binary basicity, FeO content, …
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With continuous consumption of high-grade sulfide resources, the use of nickel laterite has drawn increasingly attention [6,7,8]. Up to now, the pyrometallurgical method, namely the rotary kiln-electric furnace (RKEF) process, has been applied to produce ferronickel from nickel laterite ore [9, 10].
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The RKEF process first adopts a rotary drying kiln to decrease the water content to 20–22%, then the mix of partially dried nickel laterite with a certain amount of pulverized coal added as reductant is fed into another rotary kiln for reduction-roasting.
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Nickel rotary kiln is the key equipment used in the laterite nickel production line. Laterite nickel rotary kiln is used for nickel-iron reduction. The main raw material is laterite nickel ore. The reducing agent can be cheap coal, peat …
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The situation has become so dire, in fact, that some producers have even begun investigating ways to produce class 1 nickel from laterite ores, which historically have served only as an economically viable source of …
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Rotary kiln-electric furnace (RK-EF) process is the main pyrometallurgical route for ferronickel production from nickel laterite ores.Coal is used as a common fuel for calcination of nickel laterites in rotary kiln. Due to the depletion of high-quality coal with low impurity content, high-sulfur coal has been used as fuel in nickel laterite rotary kilns.
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High production quality: nickel iron produced by laterite nickel ore Rotary kiln is of high quality, containing about 20% Ni, and can be directly used as raw material for stainless steel production. 4. Diversified uses: The nickel products produced have a wider range of uses and can also be used as a coolant for molten steel melting. ...
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An innovative duplex process between DRMS (direct reduction-magnetic separation) and RKEF (rotary kiln-electric furnace) for treatment of low-grade nickel …
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Industrially, the pyrometallurgical treatment of laterites is mostly accomplished with a well-established method, namely, the rotary …
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upgrading of low-grade nickel laterite ore. In this paper, by collaborating with anenterprise, its aim is to validate and promote a practical and efficient pretreatment technology to upgrading of low-grade nickel laterite ore by reduction roasting in rotary kiln followed by magnetic sepa-ration. The effect of roasting temperature of rotary kiln ...
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Request PDF | On Jan 1, 2009, C. Walker and others published Nickel laterite rotary kiln-electric furnace plant of the future | Find, read and cite all the research you need on ResearchGate
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Primary world nickel production in 2020 was 2430.7 kt Ni; 69% (1677.7 kt) of them came from oxidized nickel ores (laterites) and 31% from sulfides. Production-wise, 87.7% of the 1677.7 kt came from pyrometallurgical …
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The production of ferronickel from laterite nickel ores is mainly carried out via the Rotary Kiln-Electric Furnace (RKEF) process [3], [4]. One of the main concerns in the RKEF process is the dust entrained in flue gases from the rotary kiln, which amounts to around 7.0 wt% of the incoming fresh mineral [5] .
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The rotary kiln-electric furnace process is the most common method for ferronickel production from laterite ore. Since sulfur deteriorates the mechanical properties of ferronickel, it is essential to examine the routes through which sulfur is transferred to the nickel-containing product during the extraction process.
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Both hydrometallurgical and pyrometallurgical approaches are used to process nickel laterite ores, with the best approach depending on the ore composition. ... The RKEF, or Rotary Kiln Electric Furnace method, is a pyrometallurgical approach to producing ferronickel. As a pyrometallurgical technique, this method is best suited for ores that are ...
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