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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. In this study, aiming to provide some meaningful guidance for ferronickel production of RKEF smelting, reductive roasting followed by smelting process was carried out
exergy assessment of arotary kiln-electric furnace. Nov 01, 2017 · 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
The RKEF Method. 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 predominantly saprolite. The RKEF method involves a variety of steps and is summarized below. Drying
Oct 25, 2016 · The rotary kiln-electric furnace process is the one of the most widely adopted technological process for ferronickel smelting production. A schematic of the RKEF process with rotary dryer, rotary kiln and electric furnace is shown in Fig. 1.As depicted, the RKFF process involves three main processes: the dehydration process in rotary dryer; the roasting and pre-reduction process in rotary kiln …
May 25, 2021 · Tsingshan now claims to have the capability to supply high-grade nickel matte on a regular basis and some future rotary kiln electric furnace (RKEF) …
Mar 10, 2021 · Two-thirds of the global nickel output can be attributed to the rotary kiln-electric furnace process. Due to the high contents of MgO and SiO 2 in laterite, a high temperature (∼1600 °C) and corresponding energy (approximately 14 GJ/t-ferronickel) are required during the electric furnace smelting. This work verifies the feasibility of decreasing the smelting temperature by controlling the …
It is estimated to produce approximately 14,500 tonnes per annum (tpa) of nickel, during the initial phase, through rotary kiln electric furnace (RKEF), for which Horizonte conducted a pilot test during April-May 2015. The project also includes the Glencore Araguaia nickel project (GAP), the acquisition of which was completed in August 2016
Jun 22, 2013 · Future of Rotary Kiln – Electric Furnace (RKEF) Processing of Nickel … Future of Rotary Kiln – Electric Furnace (RKEF) Processing of Nickel Laterites Authors: C. Walker, S. Kashani-Nejad, Dalvi, N. Voermann, Candy and B . »More detailed
The invention discloses an elevated short-process energy-saving novel RKEF (Rotary Kiln Electric Furnace) ferro-nickel alloy production process, comprising the following steps: (1) drying; (2) burdening; (3) roasting-prereduction; (4) electric furnace smelting; and (5) casting molding. The invention also discloses elevated short-process energy-saving novel RKEF ferro-nickel alloy production
Tsingshan now claims to have the capability to supply high-grade nickel matte on a regular basis and some future rotary kiln electric furnace (RKEF) lines are being constructed with matte converters to provide the optionality to target either stainless steel or battery markets, depending on demand
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Globally, nickel producers are conducting increased researches regarding methods of decreasing environmental pollution . The process of using a rotary kiln-electric furnace (RKEF) is the main technology used globally for the treatment of lateritic nickel ores for the production of ferronickel . In this process, ore fines are generated and emitted into the atmosphere
Aug 19, 2018 · 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... Preparation of Ferronickel from Nickel Laterite Ore via Semi-molten Reduction Followed by Magnetic Separation | SpringerLink
Oct 29, 2018 · The process plant has been designed to allow for a Stage 2 expansion with the addition of a second (RKEF) process line in the future after the first line is fully commissioned, providing flexibility to double the nickel output. A PEA study is underway for this Stage 2 …
Dust insufflation has not been a common process in nickel laterite processing through the rotary kiln-electric furnace (RKEF) flowsheet. This is the first time that a plant has invested this level of technology to have precise control of the feed rates, as well as a flexible design that allows finding the optimal way to incorporate the dust
Rotary kiln & Electric furnace; Mine Life: 28 years (as of Jan 1, 2018) ... Features of nickel laterites include: ... The Project will utilise a single rotary kiln electric furnace (RKEF) processing line from ore receipts through to shotting of the FeNi product. The product is a FeNi alloy having a 30% Ni content
The Ni/Co ratio in the smelter feed is generally ~ 40. These ores are smelted to produce either ferro-nickel or matte. In conventional pyrometallurgical processing the ore is dried, calcined (and sometimes reduced) in a rotary kiln and smelted in an electric furnace in the presence of carbon
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