##tihuan2##Ferro-nickel granules were produced from nickel laterite ore/coal composite briquettes by high-temperature direct reduction.The effects of roasting temperature,roasting time,C/O(carbon/oxygen) molar ratio and flux amount on the grades and recovery rates of nickel and iron as well as on the quality of ferro-nickel granules were studied.The …
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##tihuan2##Caron method is the combination of pyro- and hydrometallurgical processing of laterite. That is, reduction roasting and then calcine leaching with ammonia, for NiO production. Direct ammonia, (NH 3), leaching of …
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##tihuan2##Thus, microwave irradiation may be a promising route in the processing of low-grade laterite ore to recover nickel and iron. In this study, rapid reduction using …
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##tihuan2##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 …
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##tihuan2##Abstract. The process of deep reduction and magnetic separation was proposed to enrich nickel and iron from laterite nickel ores. Results show that …
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##tihuan2##In this paper, the process of solid-state metalized reduction and magnetic separation was investigated for preparation of nickel–iron concentrate from a low-grade laterite nickel ore. The effects of reduction temperature, reduction time, amount of dosages, and magnetic field strength on grades and recoveries of nickel and iron were …
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##tihuan2##The reduced products of HPAL residue through carbothermic reduction using PKS charcoal were sponge iron or direct reduced iron and iron nuggets. Sponge iron with an average apparent density of 5.8 ± 0.1 g/cm 3 and a 90.8 ± 0.4% metallization degree was obtained when reduced up to 1400 °C for 45 min.
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##tihuan2##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 …
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##tihuan2##As is well known, the process of direct reduction and magnetic separation is effective route to deal with low-grade saprolite laterite, but generally limited by the reduction of nickel (iron ...
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##tihuan2##Semantic Scholar extracted view of "Separation and recovery of iron and nickel from low-grade laterite nickel ore by microwave carbothermic reduction roasting" by Junhong Zhang et al. ... Upgrade of nickel and iron from low-grade nickel laterite by improving direct reduction-magnetic separation process. Hongyu Tian Zheng-qi Guo +5 authors ...
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##tihuan2##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),
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##tihuan2##Degradation of Direct Reduced Iron (DRI) feedstock greatly influences storage, handling, risk of reoxidation, and following melting operations. The focus of this …
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##tihuan2##As is well known, the process of direct reduction and magnetic separation is effective route to deal with low-grade saprolite laterite, but generally limited by the reduction of nickel (iron)-bearing minerals and growth of Fe-Ni alloy particles in the reduction process, causing the low recovery of nickel and iron.
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##tihuan2##Based on the metallization test, it is known that the laterite nickel ore containing high iron will produce a higher nickel reduction than the laterite nickel ore containing low iron. …
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##tihuan2##By adding a flux and using a direct reduction roasting and magnetic separation method, iron and nickel enrichment from refractory low-grade nickel laterite …
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##tihuan2##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 …
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##tihuan2##To improve beneficiation of nickel and iron from low-grade saprolite laterite with 1.29 wt.%Ni and 16.31 wt.%Fe, co-reduction with limonitic laterite ore and basicity …
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##tihuan2##DOI: 10.1016/J.MINENG.2012.03.012 Corpus ID: 93636673; Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate @article{Li2012BeneficiationON, title={Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate}, author={Guanghui Li and Tangming Shi and …
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##tihuan2##Semantic Scholar extracted view of "Improved beneficiation of nickel and iron from a low-grade saprolite laterite by addition of limonitic laterite ore and CaCO3" by Hongyu Tian et al. Skip to ... Effective and economical treatment of low-grade nickel laterite by a duplex process of direct reduction-magnetic separation & rotary kiln-electric ...
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##tihuan2##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% ...
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##tihuan2##Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex …
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##tihuan2##Iron oxide is rarely present in laterites in pure form because of the substitution of iron ions.22) In nature, the majority of limonite has dominant compound of 2Fe 2O ... 2.3 Direct reduction of laterite nickel ore in industrial scale Most laterite nickel ore processing is carried out using Elkem process. The Elkem process uses Rotary Kiln and
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##tihuan2##Download Citation | Generation process of FeS and its inhibition mechanism on iron mineral reduction in selective direct reduction of laterite nickel ore | Numerous studies have demonstrated that ...
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##tihuan2##In order to take advantage of the benefit that the Ni and Cr elements in cast iron and improve their wear and corrosion resistance [10], [11], [12], the synthetic process of low Ni-Cr alloy cast iron from red mud and laterite nickel ore was designed by a combination between high-temperature direct carbothermal reduction and subsequent …
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##tihuan2##As shown in Fig. 2.2, the higher the direct reduction temperature, the smaller ΔG Ө, indicating that the reduction reaction is more likely.Fe 3 O 4 in copper slag can be easily reduced to metallic iron, and Fe 2 SiO 4 can also be reduced to metallic iron when the direct reduction temperature is higher than 1036.7 K. If CaO is added in the …
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##tihuan2##In addition, Fe 3 O 4 can be directly reduced to metallic iron by CO, as shown in Reaction (12) in Table 5. The metalized reduction of laterite is completed under normal pressure. The gas phase composition of the system changes with temperature when the total pressure is constant. The Boudouard reaction is greatly affected by temperature.
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##tihuan2##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 …
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##tihuan2##Laterite ores especially the saprolitic laterite ore are one refractory nickel resource, the nickel and iron of which can be effectively recovered by direct reduction and magnetic separation.
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##tihuan2##Nickel, a valued metal, mainly exists as nickel oxide in laterite nickel ore. Furthermore, a large part of the laterite nickel ore is low-grade saprolitic ore. In this paper, a research on preparing ferro …
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