iron laterite in direct reduction
Welcome to the broken dawn

iron laterite in direct reduction

Upgrade of nickel and iron from low-grade nickel laterite ...

Aug 23, 2021 · 高达10%返现 · Undoubtedly, the suitable reduction atmosphere is essential to recycle the nickel and iron from nickel laterite in the direct reduction and magnetic separation process. The effect of C/Fe mass ratio on recycling efficiency of Ni and Fe was investigated and the results are presented in Fig. 7. It is implied that with an increase in C/Fe from 0 ...

Recovery of iron and nickel from nickel laterite ore by ...

By adding a flux and using a direct reduction roasting and magnetic separation method, iron and nickel enrichment from refractory low-grade nickel laterite ore, in which nickel is mainly contained ...

Efficient enrichment of nickel and iron in laterite nickel ...

Mar 01, 2020 · The process of deep reduction and magnetic separation was proposed to enrich nickel and iron from laterite nickel ores. Results show that nickel–iron concentrates with nickel grade of 6.96%, nickel recovery of 94.06%, iron grade of 34.74%, and iron recovery of 80.44% could be obtained after magnetic separation under the conditions of reduction temperature of 1275 °C, reduction time of 50 ...

(PDF) Direct reduction of low grade nickel laterite ore to ...

Jan 20, 2017 · Direct reduction of low grade nickel laterite ore to produce ferronickel using isothermal – temperature gradient ... Ltd. produced sponge iron with the

Effect of Carbon Content in Direct Reduction Process of ...

This research conducted to see the effects of carbon content in producing iron nugget. Limonite iron ores used in this research are part of laterite rocks taken from Sebuku Island in South Kalimantan, Indonesia. Variation made to weight of carbon mixed with laterite. Heating temperatures of direct reduction process are 700°C, 900°C, and 1000°C.

Beneficiation of nickeliferous laterite by reduction ...

May 01, 2012 · Highlights Ni beneficiation of laterite ore by using direct reduction process is proposed. Sodium sulfate is capable of intensifying the reduction roasting of laterite. Average particle size of ferronickel grows up to 50 μm when reduced with Na 2 SO 4. Selective enrichment of Ni can be realized by suppressing the metallization of Fe. New-born troilite (FeS) facilitates the aggregation of ...

Modelling and optimization of a rotary kiln direct ...

applications including ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables, covering, among others: feed properties and rates, combustion

Direct reduced iron - Wikipedia

Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal. Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below the melting point of iron. Reduced iron derives its name from these processes, one example bein

Open Access proceedings Journal of Physics: Conference series

The effect of iron content on the reduction of nickel laterite by direct reduction method . I Setiawan. 1, E Febrina. 1, A B Prasetyo. 1, R Subagja. 1, and F Firdiyono. 1. Research Center For Metallurgy and Materials, Indonesian Institute of Sciences, Serpong, Tangsel, Indonesia .

Direct Reduction of Limonitic Laterite Nickel Ore with ...

The increasing demand for stainless steel and the scarcity of sulfide nickel ore affect the increase of laterite nickel ore processing. One of the processes that has been proven can be applied to process laterite nickel ore is direct reduction. In the direct reduction, the reduction atmosphere was adjusted by controlling the volume of CO and CO2 from carbon source materials, such as coal ...

(PDF) The effect of iron content on the reduction of ...

The effect of iron content on the reduction of nickel laterite by direct reduction method July 2019 IOP Conference Series Materials Science and Engineering 541:012039

Effect of Carbon Content in Direct Reduction Process of ...

This research conducted to see the effects of carbon content in producing iron nugget. Limonite iron ores used in this research are part of laterite rocks taken from Sebuku Island in South Kalimantan, Indonesia. Variation made to weight of carbon mixed with laterite. Heating temperatures of direct reduction process are 700°C, 900°C, and 1000°C.

(PDF) Direct reduction of low grade nickel laterite ore to ...

Jan 20, 2017 · Direct reduction of low grade nickel laterite ore to produce ferronickel using isothermal – temperature gradient ... Ltd. produced sponge iron with the Krupp-Renn process at the Oheyama Works ...

Engineering properties, phase evolution and microstructure ...

Laterites with disordered kaolinite undergo direct transformation to iron-rich Gismondine and Stratlingite. ... and many of the requirements relating to the reduction of greenhouse gas emissions, waste minimization, and environmental protection. ... Laterites are iron-rich aluminosilicates generally presenting SiO 2 /Al 2 O 3 and SiO 2 /R 2 O 3 ...

Modelling and optimization of a rotary kiln direct ...

laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables covering, amongst others: feed properties and rates, combustion options, kiln operating information (speed and fill level),

Smelting process of direct reduction iron bearing Ni and ...

suitable for direct use in ferroalloy production, so a beneficiation step is indispensable. If the Ni and Cu elements can directly access the iron with the reduction of Fe minerals, it may be an effective solution to this problem. Hence, co-reduction followed by the magnetic separation of copper slag and nickel laterite to prepare the direct ...

Modelling and optimization of a rotary kiln direct ...

applications including ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables, covering, among others: feed properties and rates, combustion

Effects of Na 2 SO 4 on iron and nickel reduction in a ...

Jul 19, 2017 · Reduction reactions of Na 2 SO 4 resulted in weakening of the reduction atmosphere, and the main product of Na 2 SO 4 changed and delayed the reduction of iron. Eventually, iron metallization was effectively controlled during laterite ore reduction roasting, leading to iron mainly being found in wustite and high iron-containing olivine.

Generation process of FeS and its inhibition mechanism on ...

Dec 16, 2014 · Numerous studies have demonstrated that Na2SO4 can significantly inhibit the reduction of iron oxide in the selective reduction process of laterite nickel ore. FeS generated in the process plays an important role in selective reduction, but the generation process of FeS and its inhibition mechanism on iron reduction are not clear. To figure this out, X-ray

Effect of reduction process parameter in direct reduction ...

/ Effect of reduction process parameter in direct reduction process of laterite to produce substitute pig iron for thin wall ductile iron material. Advanced Materials and Engineering Materials III. Trans Tech Publications, 2014. pp. 95-99 (Advanced Materials Research).

Recovery of iron and nickel from nickel laterite ore by ...

By adding a flux and using a direct reduction roasting and magnetic separation method,iron and nickel enrichment from refractory low-grade nickel laterite ore,in which nickel is mainly contained in silicates,was studied.Better technical indicators were obtained by adding the flux.The optimal conditions are coal as the reducer with a dosage of 15%,KD-2 as the flux with a dosage of 20%,and ...

direct reduction nickel ore

Selective Reduction of Laterite Nickel Ore. Keywords: laterite nickel ore, selective reduction, direct reduction, additives 1. Nickel ­ General Nickel is an important alloying metal with widerange application in the industry.1) Nickel is one of the most important strategic metals which is widely applied to stainless

Sodium Thiosulfate and Natural Sulfur: Novel Potential ...

Mar 23, 2021 · Increasing concentrations of Na 2 S 2 O 3 additives and natural sulfur used in direct reduction of limonitic laterite ore resulted in an increase in the recovery of nickel-metal products up to 93.22% and 97.91% on using 10 wt% additives, respectively, but at the same time, iron

(PDF) Effect of Carbon Content in Direct Reduction Process ...

This paper discusses the effect of carbon content in direct reduction process of limonite iron oxide to produced iron nuggets. The limonite iron ores used were taken from laterite rocks from Sebuku Island. Experimental Method This research is done in laboratory scale. Limonite iron ores which are top part of laterite rocks used as iron source.

Upgrade of nickel and iron from low-grade nickel laterite ...

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. Meanwhile, the mechanisms on the enhanced growth of the Ni–Fe particles and the phase ...

Engineering properties, phase evolution and microstructure ...

Laterites with disordered kaolinite undergo direct transformation to iron-rich Gismondine and Stratlingite. ... and many of the requirements relating to the reduction of greenhouse gas emissions, waste minimization, and environmental protection. ... Laterites are iron-rich aluminosilicates generally presenting SiO 2 /Al 2 O 3 and SiO 2 /R 2 O 3 ...

Effect of Carbon Content in Direct Reduction Process of ...

Limonite iron ores used in this research are part of laterite rocks taken from Sebuku Island in South Kalimantan, Indonesia. Variation made to weight of carbon mixed with laterite. Heating temperatures of direct reduction process are 700°C, 900°C, and 1000°C.

Materials | Free Full-Text | Coupled Preparation of ...

In this study, while preparing nickel iron from carbon base of laterite nickel ore by direct reduction, the gelling materials with silicate tricalcium silicate (C 3 S) and aluminate tricalcium (C 3 A) as main components were prepared from coal gangue. The coupling of these two reaction processes was investigated experimentally.

Modelling and optimization of a rotary kiln direct ...

laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables covering, amongst others: feed properties and rates, combustion options, kiln operating information (speed and fill level),

Effect of Reduction Process Parameter in Direct Reduction ...

This research used lateritic rocks from Sebuku Island as the iron source and coal as carbon source. Particle size with the highest Fe content is used for reduction process. Variations in reduction process made in mass ratio, process temperature, and process time. The mass ratios are 1:4 and 1:5. The process temperatures are 900OC and 1000OC.

direct reduction nickel ore

Selective Reduction of Laterite Nickel Ore. Keywords: laterite nickel ore, selective reduction, direct reduction, additives 1. Nickel ­ General Nickel is an important alloying metal with widerange application in the industry.1) Nickel is one of the most important strategic metals which is widely applied to stainless

MAGNETIZING ROASTING OF IRON LATERITE ORE BY SUB ...

iron recovery, at 650 deg. C iron recovery, at 750 deg. C iron recovery, at 950 deg. C Figure 2. Effect of coal concentration on reduction performances The transformations of limonite ore to magnetiz-ing roast product is shown in Figure 3. It is pre-sented the fresh limonite before reduction (Figure 3 A), limonite ore appear in earth color and ...

(PDF) Engineering properties, phase evolution and ...

This paper investigates the direct transformation of laterites (natural iron‐rich aluminosilicates) to cementi- tious composites with principal mineral phases being Gismondine and Stratlingite.

Influence of laterite nickel ore on extracting iron from ...

Toward this, the influences of laterite nickel ore on thermodynamic reaction, slagging and smelting reduction of extracting iron from red mud were studied. The results indicated that the product of extracting iron from red mud (R100) was changed with the addition of laterite nickel ore (R70L30).

Additives in Selective Reduction of Lateritic Nickel Ores ...

Jul 07, 2021 · In this work, the selective reduction of lateritic nickel ore was carried out using sodium sulfate, sodium carbonate, and sodium chloride as additives. The 5 wt% of anthracite coal, which contains 60.35% of fixed carbon and 1.9% of sulfur, was used as a reductant. All raw materials were mixed homogenously prior to the pelletization process into 10–15 mm of diameter. The reduction

Impacts of Laterite Mining of Nickel and Iron Ores on ...

The major operation in laterite mining is stripping of upper soil which includes removal of forest cover or vegetal cover. The effects on overland flow processes after stripping the soil are as follows: Reduced interception capacity of forest and vegetal thus increasing direct runoff.

Bioleaching of Transition Metals From Limonitic Laterite ...

Jul 26, 2021 · The implication that ferric iron was being reduced in the presence of bio-ZVS helps explain this observation, as the ferrous iron generated would have had a direct role in mediating the reductive dissolution of Mn (IV) minerals (Johnson and Pakostova, 2021) and the release of associated cobalt and nickel. Many lateritic-limonites contain ...

Frontiers | Indirect Redox Transformations of Iron, Copper ...

Feb 10, 2017 · Experiments were carried out to examine redox transformations of copper and chromium by acidophilic bacteria (Acidithiobacillus, Leptospirillum, and Acidiphilium), and also of iron (III) reduction by Acidithiobacillus spp. under aerobic conditions. Reduction of iron (III) was found with all five species of Acidithiobacillus tested, grown aerobically on elemental sulfur.

Copyright © 2021.Company name All rights reserved.Dawn Broken
E-mail: