However, the RKEF process is mainly suited to treating nontronite and saprolite laterite ores to achieve ferronickel with a high Ni content, whereas relatively few studies have reported on this process to upgrade limonitic laterite ore.
An innovative technology, nitric acid pressure leaching of limonitic laterite ores, was proposed by our research team. The HNO3 regeneration is considerable significance for the improvement of the…
The diminution of sulfide ore deposit as the main source of nickel extraction initiates the development of alternative methods to maximize the processing of low-grade nickel ore including limonitic laterites. Aiming to produce ferronickel with high nickel content and recovery, the study used sodium thiosulfate and natural sulfur as novel additives to be …
This chapter introduces the principle of how low-grade iron ores are upgraded to high-quality iron ore concentrates by magnetic separation. Magnetite is the most magnetic of all the naturally occurring minerals on earth, so low-intensity magnetic separators are used to upgrade magnetite ores. On the other hand, because oxidized …
Abstract. We investigated four catalysts for the dry reforming of methane: three Ni-containing natural iron ores (LN, SN, and NN ores) and one Ni-supported ore (Ni-supported NN ore) to solve the problems about unused high-temperature waste heat and CO 2 emission in the steel industry.
Semantic Scholar extracted view of "Atmospheric acid leaching of powdery Ni-Co-Fe alloy derived from reductive roasting of limonitic laterite ore and recovery of battery grade iron phosphate" by Ming-jun Rao et al.
These studies show selective grinding can upgrade nickel in siliceous goethite and saprolite ores, but the low nickel recovery compared to other methods of …
Ironsing is the fastest Attunement to obtain a Legendary Weapon, with the Ignition Deepcrusher released in the exact same update as Ironsing itself. Ironsing is the only Attunement that does not have a Hero Blade. (It'd probably just be a literal sword, anyways.) Ironsing is called 'Element' in the game's code.
In order to obtain good sintering performance, it is important to understand sintering properties of iron ores. Sintering properties including chemical composition, granulation and high-temperature behaviors of ores from China, Brazil and Australia. Furthermore, several indices were defined to evaluate sintering properties of iron ores. …
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.
During the reduction of laterite ores to prepare ferronickel product, sodium or calcium salt usually needs to be added, but it would increase the raw material cost. Thus, the feasibility of co-reduction followed by magnetic separation of strong alkaline waste red mud and a limonitic laterite ore to prepare ferronickel was investigated.
The limonitic ores are primarily treated by hydrometallurgical techniques, such as high pressure acid leaching (HPAL), due to their low nickel (1 to 1.6 %), high iron (>40 %) and high water contents.
The limonitic laterite is rich in iron in the form of goethite, while the content of valuable metals such as nickel, cobalt, and scandium is relatively low [11,12].
Laterite nickel ores are generally divided into limonitic, saprolitic, and transition layers with significant varied components in each layer [ 22 ]. In general, the limonitic laterite ores have high iron (> 40%) but low nickel (~ 1%), which are generally adopted to treat by hydrometallurgical processes such as high-pressure acid leaching [ …
Some researchers have tried to use high iron-bearing mineral powders (such as iron ore concentrates and limonitic laterite ore) as nucleating agents for the growth of ferronickel particles, which can contribute to the recycling of nickel from low-grade nickel laterite [ 29, 30 ], but it is difficult to obtain the products with high-grade nickel ...
The SAL process enables the selective and efficient enrichment of scandium from low-grade limonitic laterites with lower costs for equipment and operation compared to high-pressure acid leaching ...
These studies show selective grinding can upgrade nickel in siliceous goethite and saprolite ores, but the low nickel recovery compared to other methods of beneficiation may be prohibitive. ...
The oxidic nickeliferous laterite ore deposits are composed of two major nickel-containing layers: an upper limonitic layer and a lower saprolitic layer. The limonitic layer occurs below the overburden and primarily consists of goethite ( (Fe,Ni)O·OH), with the nickel substituting for iron in the crystal lattice.
Nitric acid pressure leaching was used to treat Fe (II)-rich limonitic laterite ores. Ni, Co and Fe can be extracted selectively under milder pressure leaching conditions. Major parameters affecting extractions of target elements were determined. Behavior of iron as well as nickel and cobalt in the leaching process was clarified. A certain amount …
This is because the high Fe/Ni ratio of limonitic laterite ore results in an un-selective reduction effect and ultimately results in low-grade Ni ferronickel product. This paper describes an investigation conducted to upgrade limonite nickel laterites for the preparation of ferronickel by selective reduction smelting technology.
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 …
Another problem of limonitic ores is their strong tendency to present impurities; in fact, a typical case is the presence of phosphorous, which is a deleterious element, very difficult to control during the reduction and steelmaking stage. This feature strongly limits the use of phosphorous limonite ores to produce iron and steel.
The recovery of nickel from laterite ore with sulphuric acid under the effect of microwave irradiation was studied. The experimental results indicated that the extraction rate of nickel was…. Expand. 13. Save. Separation and recovery of iron and nickel from low-grade laterite nickel ore by microwave carbothermic reduction roasting.
Improved beneficiation of nickel and iron from a low-grade saprolite laterite by addition of limonitic laterite ore and CaCO3
Kinetic study in selective reduction of limonitic and saprolitic nickel ore: Étude cinétique de la réduction sélective de minerai de nickel limonitique et saprolitique
One possible solution is to selectively reduce the nickel oxide in the ore, which could then be upgraded by, for example, magnetic concentration. In this article, a thermodynamic study was performed on the reduction of a …
The limonitic laterite is a kind of rich nickel-cobalt-scandium resource. At present, there are few reviews on the extraction of limonitic laterite. This paper reviews the hydrometallurgical processes for limonitic laterite ores and the methods of recovering valuable elements.
This chapter introduces the principle of how low-grade iron ores are upgraded to high quality iron ore concentrates by magnetic separation. Magnetite is the …
The waste of iron resources in the hydrometallurgical processes of limonitic laterite ores is a problem that needs attention at present. The valuable metal elements …
Blacksmiths can refine Iron Ore into Iron, Iron and Coal into Steel, and Elemental Ores into Elemental Stones. For material requirements, see Iron Tempering, Steel Tempering and Enchantedstone Craft. Each attempt to …
Semantic Scholar extracted view of "Selective pressure leaching of Fe (II)-rich limonitic laterite ores from Indonesia using nitric acid" by Bao-zhong Ma et al.
Abstract. This chapter describes the iron oxide compound known as Limonite (abbrv. lim), as seen with optical, reflected light microscopy. The presentation, including a discussion of composition, types and meaning of limonite for exploration, follows a systematic scheme to facilitate consultation and comparison with other ores.
Limonitic laterite contains low iron and nickel grades and much high smelting minerals and loss on ignition (LOI), identified as refractory iron ore for sintering.
DTA shows that limonite has a phase transition in the low temperature (200 – 300 °C) with the goethite transformation to hematite. This phase is good optimalization for nickel diffusion in the ...
The separation of high levels of iron from acid leaching liquor is a difficult task, especially in the atmosphere acid leaching process for laterite ore. In this paper the removal of iron by goethite precipitation from the leach liquor of …
At present, the primary technology to treat limonitic laterite ores is high-pressure acid leaching (HPAL) with sulfuric acid, which produces 0.9 t leach residue from 1 t laterite ore.
Improved beneficiation of nickel and iron from a low-grade saprolite laterite by addition of limonitic laterite ore and CaCO3
The fluidity of melt formed in the sintering process of iron ores is an important factor for producing a high-strength sinter. When using a large amount usage of limonitic ores as core ore of the quasi-particle of sinter mix, it is predicted that the fluidity of formed melt decreases, because the solid ratio in the melt increases by an acceleration of the …
The sulfation-roasting-leaching process holds promise as an environmentally friendly method of production but has low recovery efficiency and poor selectivity for Ni and Co in ores containing impurity metals, including Fe, Al, and Cr. In this study, the transformation mechanism and leaching behavior of metals in a limonitic laterite ore during the …
