Material and energy flows in rotary kiln-electric furnace smelting …
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 ...
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Improving the rotary kiln-electric furnace process for …
ronickel from laterite nickel ores is the Rotary Kiln-Electric Furnace (RKEF) process. In the RKEF process, minerals undergo calcination and partial reduction in a rotary kiln. Large amounts
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Separation and recovery of iron and nickel from low-grade laterite
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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LCA EVALUATION FOR DIFFERENT TREATMENT …
OF NICKEL LATERITE ORE Shuai Wang1,2, Hongxu Li*1,2, Chao Li1,2, Xiangxin Hao1,2, Qinghua Bao, Lifeng ... calcination rotary kiln, calcine was got and then add the calcine with volatile coal (10~30mm)into electric furnace, getting nickel-iron after reduction smelting at …
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The Effect of Sulfur in Rotary Kiln Fuels on Nickel Laterite
Rotary Kiln - Electric Furnace (RKEF) process is a pyrometallurgical technique to extract nickel from laterite ores. It is essentially a two-step process where the ore is first calcined in a rotary kiln and then smelted in an electric furnace. The product of the RKEF process is crude
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The effect of sulfur content of rotary kiln fuel on the …
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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Separation and Recovery of Iron and Nickel from Low-Grade Laterite
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 …
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Method for producing ferronickel by adopting rotary kiln …
The invention provides a method for producing ferronickel by adopting a rotary kiln direct reduction-RKEF (Rotary Kiln-Electric Furnace) combination method. The method comprises the following steps: drying a laterite nickel ore for later use; crushing and screening an appropriate amount of the dried laterite nickel ore, and then mixing the screened laterite nickel ore with a …
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A Review of Direct Reduction–Magnetic Separation Process …
Nickel laterite ores (mainly saprolite, low Fe content) typically undergo pre-calcination in a rotary kiln at temperatures > 800 °C for extended periods to remove the free water and hydroxyl water (around 35–47 wt.%) absorbed from the tropical weather before further pyrometallurgical treatment [12, 23, 24].
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Ferronickel Preparation from Nickeliferous Laterite by Rotary Kiln …
Request PDF | Ferronickel Preparation from Nickeliferous Laterite by Rotary Kiln-Electric Furnace Process | Nickel is an important strategic metal, which is mainly used for stainless steel production.
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Nickel industry
Laterites make up over 70 % of both nickel production and known terrestrial resources today and have been the fastest growing source of nickel for some time. In Part 2 of this series on 'Processing nickel' we dig deeper into the specifics of laterites, one of the two main nickel ore types and look at smelting, the most common processing technique.
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Material and energy flows in rotary kiln-electric furnace smelting …
For improving the resource utilization, the slag is reutilized as construction material and the nickel is recycled from dust into rotary kiln. Moreover, the flue gas and furnace gas are recycled as energy supply to increase efficiency. ... The outlet temperature of semi-dry laterite ores, °C: 85: Rotary kiln: The inlet temperature of semi-dry ...
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Processing of Nickel Laterite Ores on the Rise
Learn about the rising demand for nickel laterite ore processing and the technologies and equipment shaping its extraction and refining. ... 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 ...
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Laterite Nickel Ore Rotary Kiln
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 …
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Effective and economical treatment of low-grade nickel …
An innovative duplex process between DRMS (direct reduction-magnetic separation) and RKEF (rotary kiln-electric furnace) for treatment of low-grade nickel laterite in …
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The Impacts of Temperature, Gas Composition and Reaction …
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 every 1 ton of nickel in …
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Nickel Laterite Smelting Processes and Some Examples of …
Alternative Nickel Laterite Smelting Processes to the Rotary Kiln-Electric Furnace (RKEF) Process 2.1. The Vaniukov Process The Vaniukov process is a well-established technology for pyrometallurgical treatments, especially for the smelting of copper ores [11,12].
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Rotary Dryers in Nickel Laterite Ore Preparation
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 class 2 nickel, due to the highly complex nature of converting them to class 1. The Need for Nickel Laterite Dryers
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What Is Rotary Kiln-Electric Furnace Process?
The production of ferronickel by the rotary kiln-electric furnace(RKEF) process is a rapidly developing nickel laterite ore treatment process. Because the RKEF process technology is mature and reliable, and the project investment risk is low, it is widely used in nickel smelting plants around the world. The main processes of t…See more on rotarykilnfactory
Nickel Laterite Smelting Processes and Some …
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, …
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Nickel laterite rotary kiln-electric furnace plant of the future
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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RKEF Lateritic Nickel Rotary Kiln
The nickel laterite ore rotary kiln can produce nickel iron by direct reduction method, and it is also one of the key pieces of equipment in the rotary kiln electric furnace (RKEF) smelting process.
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rotary kiln for nickel
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 coal, or medium coal. About laterite nickel. The main minerals of nickel ore include pyrrhotite, serpentine nickel ore, garnierite or nickeliferous pyrite, and red nickel ore. Nickel-iron is ...
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Large- and Particle-Scale energy assessment of reduction …
Fig. 1 shows a simplified flow diagram of the RKEF process for FeNi production. First, the laterite mineral enters the process with an average nickel content of 1.8–3.0% wt and a moisture content of 17–34% wt. The rotary dryer reduces the moisture content to around 10.0% wt [10].Next, fresh minerals and reductant coal enter the rotary kiln furnace to undergo drying, …
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Laterite Nickel Ore Rotary Kiln
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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How to Process the Laterite Nickel Ore?
The nickel content and mineral composition of different deposits vary widely. Therefore, it is difficult to enrich by traditional beneficiation processes. At present, the beneficiation processes of laterite nickel ore include nickel-sulfur process, rotary kiln-submerged arc furnace process (RKEF), sintering-blast furnace reduction process, direct reduction …
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Ferronickel Preparation from Nickeliferous Laterite by Rotary …
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.
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Process Of Smelting Laterite Nickel Ore By Rotary Kiln …
(1) Drying: Nickel ore uses a rotary drying cylinder to remove moisture; (2) Ingredients: Mix and mix laterite ore with anthracite and limestone; (3) Pre-reduction: reduction …
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Thermal Science and Engineering Progress
laterite ore for Ferronickel production via the rotary Kiln-Electric furnace process Daniel A. Quintero-Coronel a, b, Wilson D. Guillin-Estrada a, Jorge L. Echeverri-Roman a,
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Method for producing ferronickel by processing laterite nickel …
China smelts with laterite-type nickel ore in the world to produce ferronickel (comprising nickel-contained pig iron) first big country, has the hundreds of smeltery of size.Wherein, smelting process used has the smelting of blast-furnace smelting, local method sintering-electric furnace reduction respectively, sinter machine sintering-electric furnace reduction smelts and rotary kiln …
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(PDF) Large- and Particle-Scale Energy Assessment of
Large- and Particle-Scale Energy Assessment of Reduction Roasting of Nickel Laterite Ore for Ferronickel Production via the Rotary Kiln-Electric Furnace Process May 2022 Thermal Science and ...
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