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].
→ WhatsApp: +86 18221755073
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, …
→ WhatsApp: +86 18221755073
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.
→ WhatsApp: +86 18221755073
The increasing consumption of stainless steel immensely promotes the demand of nickel [1].As sulfide nickel ore has been depleted gradually, the effective utilization of laterite nickel ore, accounting for approximately 72 percent of global nickel resources, becomes extremely urgent [2].Based on consideration of the economic efficiency and environmental factors, two …
→ WhatsApp: +86 18221755073
(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 …
→ WhatsApp: +86 18221755073
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
→ WhatsApp: +86 18221755073
Electric furnace, rotary kiln and smelting is currently the world-wide integration process for the production of ferronickel from nickel laterite ore, despite its high energy …
→ WhatsApp: +86 18221755073
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.
→ WhatsApp: +86 18221755073
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
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, …
→ WhatsApp: +86 18221755073
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. ... Coal consumption in nickel laterite rotary kilns in these plants is reported to be in the range of 80 to 115 kg/ton [29].
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
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.
→ WhatsApp: +86 18221755073
Metals. 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 smelting—followed by further ...
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
The dried laterite ore is reduced in a rotary kiln and the calcine is further smelted in the electric arc furnace to produce crude ferronickel alloy [17, 91]. The reductive roasting in rotary kiln can provide hot feeds for electric arc …
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
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. The …
→ WhatsApp: +86 18221755073
The rotary kiln-electric furnace (RKEF) process is the primary method for extracting nickel from saprolite ores. In this technique, the ore is first calcined and pre-reduced at 850–1000 °C in a rotary kiln followed by smelting in an electric …
→ WhatsApp: +86 18221755073
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
→ WhatsApp: +86 18221755073
An innovative duplex process between DRMS (direct reduction-magnetic separation) and RKEF (rotary kiln-electric furnace) for treatment of low-grade nickel laterite in …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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].
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
The reduction in the capital and operating costs of a single-line, 2 million tonne of ore per year nickel laterite facility, and accompanying improvement in energy efficiency and …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
The schematic diagram of the reduction process of nickel laterite ore in a rotary kiln is shown in Fig. 13. The RK-EF process is mainly suitable for treating saprolite type nickel laterite ore to obtain high-Ni content ferronickel. However, there are relatively few studies on the reduction smelting of limonite type nickel laterite ore using ...
→ WhatsApp: +86 18221755073
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
→ WhatsApp: +86 18221755073
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.
→ WhatsApp: +86 18221755073
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, and Cr2O3 content on the …
→ WhatsApp: +86 18221755073
كسارة الحجارة - تباع من قبل الموردين المعتمدين، مثل كسارة الفك / المخروط / التأثير / الكسارة المتنقلة، وما إلى ذلك.
احصل على عرض أسعار
