The primary pyrometallurgical route to produce ferronickel from laterite nickel ores is the Rotary Kiln-Electric Furnace (RKEF) process.
Industrially, the pyrometallurgical treatment of laterites is mostly accomplished with a well-established method, namely, the rotary kiln–electric arc furnace (RKEF) process, which …
Large- and Particle-Scale Energy Assessment of Reduction Roasting of Nickel Laterite Ore for Ferronickel Production via the Rotary Kiln-Electric Furnace Process
A study has been carried out to understand the melting behavior of pelletized siliceous nickel ore samples. blended with limestone and anthracite heating up to 1 300°C. Microscopic observation ...
Since the 1950's, production of ferronickel from laterites has predominantly been achieved using the Rotary Kiln -Electric Furnace (RKEF) process. The productivities of kilns and furnaces have increased steadily over the years and metallurgical smelters can now rely on a smaller number of high-powered, reliable units to meet …
The treatment of laterites has been a research hotspot in extractive metallurgy over the past decades. Industrially, the pyrometallurgical treatment of laterites is mostly …
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.
Coprocessing of Stainless-Steel Pickling Sludge with Laterite Ore via Rotary Kiln-Electric Furnace Route: Enhanced Desulfurization and Metal Recovery
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 smelting—followed by further refining for the removal of impurities from the raw ferro-nickel.
At present, rotary kiln-electric furnace (RKEF) characterized by large scale of production and good quality of product is still the main pyrometallurgical process to produce crude ferronickel from saprolite laterite ore [ 12, 13 ]. However, affected by supply–demand relationship and export policy of nickel-rich country in reserves, with the …
The factory has five rotary kiln production lines with an annual output of 13,000 tons of nickel in ferronickel. After drying, crushing, and screening, the laterite-nickel ore of …
The current process approach for enriching ferronickel from laterite nickel ore is a pyrometallurgical process, such as the rotary kiln electric furnace process and blast …
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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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 …
The rotary kiln-electric furnace process is the most common method for ferronickel production from laterite ore. Since sulfur deteriorates the mechanical properties of …
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The current process approach for enriching ferronickel from laterite nickel ore is a pyrometallurgical process, such as the rotary kiln electric furnace process and blast furnace process [ 17 ].
Rotary Kiln - Electric Furnace (RKEF) process is the most commonly used pyrometallurgical technique for processing nickel laterite ores and is mainly suited for …
This paper presents a detailed large- and particle-scale energy anal-ysis of a 180 t h 1 rotary kiln furnace for Ferronickel Production via the Rotary Kiln-Electric Furnace (RKEF) process.
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 …
The existing commercial NPI production processes such as blast furnace smelting, rotary kiln-electric furnace smelting, and Krupp-Renn (Nipon Yakin Oheyama) processes are discussed.
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 …
Among these methods, the rotary kiln-electric furnace (RKEF) process is widely used in China due to its advantages of good adaptability for various nickel laterite, less harmful elements, high production efficiency and mature process [10].
In this work, the metallurgical treatment methods of nickeliferous laterites are examined and among them the Greek ferronickel (Fe-Ni) production process. Nickel laterites …
In the recent years, ferronickel has been used as a substitute for electrolytic nickel for alleviating the cost of stainless steel production. Rotary kiln-electric furnace (RKEF) …
An innovative technical route has been proposed to improve recycling efficiency of Ni and Fe from low-grade nickel laterite via the duplex process between direct reduction-magnetic separation and rotary kiln-electric furnace.
The rotary kiln-electric furnace (RKEF) process is the main method for producing ferronickel from nickel laterite ore . However, this process is energy intensive as it involves several high temperature steps. Therefore, a novel process is proposed to directly produce ferronickel from nickel laterite ore by semi-molten reduction, which is …
It mainly includes blast furnace method, rotary kiln direct reduction method, and rotary kiln-submerged arc furnace combined method. Raw materials include laterite nickel …
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
In summary, no technology can be used to treat all types of laterite nickel ore in an economical way, the process technology is selected largely considering chemical components and mineral constituents of different ores. As a result, the mineral composition, embedding characteristics, and elemental state of target elements in limonitic laterite …
The factory has five rotary kiln production lines with an annual output of 13,000 tons of nickel in ferronickel. After drying, crushing, and screening, the laterite-nickel ore of humus soil type is mixed with a fusing agent …
Proses kalsinasi merupakan proses pengeringan lanjutan pada tanur reduksi rotary kiln untuk mengilangkan kandungan air sisa dari 20 – 15% menjadi 0%.
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. Sulfur is one of the harmful elements in crude ferronickel obtained via the RKEF process. Typically, laterite ores contain insubstantial sulfur content; hence, it is …
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.
Rotary kiln-electric furnace (RKEF) smelting is currently the world-wide mainstreaming process for ferronickel production from nickeliferous laterite ore, in spite of the high power consumption.
Rotary Dryers Serve Critical First Step in Nickel Laterite Ore Preparation. As demand for nickel skyrockets in the quest for a clean-energy future, laterite ores are becoming an increasingly important source of nickel. One of the major challenges presented by laterite ores, however, is their high moisture content, which, depending on the method ...
Large- and Particle-Scale energy assessment of reduction roasting of nickel laterite ore for Ferronickel production via the rotary Kiln-Electric furnace process
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.
