Many researches on the thermal analysis of laterite nickel ore reported that the free water was removed at temperatures between 333 K and 383 K, dehydration …
Stainless steel crude alloy recovery from direct smelting of low-grade chromite, nickel laterite and manganese ores was investigated. The mixed low-grade ores were directly smelted in an elevator furnace at smelting temperatures ranging from 1550 to 1600 °C. Smelting experiments were conducted in a laboratory elevator furnace …
The Ramu nickel-cobalt laterite, of 25km², is the largest of the wet tropical nickel laterite deposits in Papua New Guinea. Recent drilling, mapping and geophysical data significantly improves ...
Nickel laterite ore is used to produce nickel metal, predominantly to manufacture stainless steel as well as nickel sulfate, a key ingredient in the batteries that drive electric vehicles. Nickel laterite production is on the rise and surpassing conventional sulfide deposits. The efficiency of mining and processing nickel laterites is defined by …
the metal contents of the crude alloy increase with the increase in the amount of manganese ore. Compared to the recoveries of Fe, Cr, and Ni when CaO was added, …
Part 1 – Geology of nickel laterite deposits Geology of laterite profiles on ultramafic rocks The process referred to as "lateritisation" is essentially chemical weathering taking place in
The morphological and chemical composition of chromite in the partially-serpentinized harzburgite and oxide zone of two laterite profiles at the Goro lateritic nickel deposit, New Caledonia, were investigated to: (1) establish the melt conditions at the mantle-crust boundary during ophiolite formation, and (2) characterize the weathering of …
Ferrochrom is produced in submerged arc furnace (SAF) by carbothermic smelting reduction process. Chromite ore fines (0–25 mm) are commonly used to produce sintered pellets to use in ferrochrome production process. In the chrome ore pelletisation process chromite ore along with 4–5% coke is milled in the wet ball mill and filtered ore …
Feasibility analysis and experimental studies for the production of a stainless steel master alloy by direct smelting reduction have been investigated in this work, showing that the master alloy with proper compositions and satisfactory metal recoveries can be obtained at 1600°C. When the temperature was increased from 1450 to 1600°C, the grades for Fe, …
To acquire understanding of Ni enrichment from laterite ore, the mineralogy and crystal chemistry of a low grade limonite type nickel laterite ore sample assaying 0.97% Ni from Indonesia were studied using optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA).
The smelting experiments were carried out in a high-temperature electric furnace. Fig. 1 shows the schematic diagram of the experimental process. The raw materials used in the study included nickel laterite sinters, iron ores, coke, CaCO 3, and SiO 2.The nickel laterite sinters, iron ores, and coke were dried in a drying oven at 110 …
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. Thus, sinter pot tests of limonitic laterite via pressurized densification sintering and its intensification mechanism were conducted, and the industrial application prospect was …
The ore has a high content of iron and low content of nickel, with quartz, goethite, and dolomite being the major crystalline phases; the nickel-ferrous laterite ore was of the goethite type. The results of their study showed that goethite and hematite were the main minerals of the sample and nickel are scattered throughout the ore area.
The smelting behavior of waste chromite ore fines containing Cr and Ni to produce crude Fe–Cr–Ni–N alloy was investigated in this study. In the experiments, for each heat, liquid steel melt (metal pool 1 kg) was prepared in a 3--capacity laboratory-scale electric arc furnace for the absorption of reduced metals like chromium, nickel, etc., …
The rotary kiln-electric furnace process accounts for two-thirds of the global nickel output. The raw laterite nickel ore contains approximately 1–5 wt.% Cr2O3, but …
Limonitic laterite ore assaying 0.86% Ni and 3.45% Cr 2 O 3 is characterized by high iron grade of 45.09% and high gangue ... Technical situation and prospect of lateritic ore smelting in blast furnace at home and abroad. ... Value-added utilization of waste silica powder into high-quality chromite pellets preparation process. Powder …
Balango et al. [65] smelted calcinated chromite ore and nickel laterite in a vertical resistance heated furnace. The aim was to investigate the simultaneous …
Experiments on the smelting reduction of chromite ore in a 1-kg middle frequency induction furnace showed that the reduction is controlled by the mass transfer of chromium oxide dissolved in the slag. The dissolution of chromite particles into the liquid slag has little effect on the reduction rate. A decrease in the initial slag basicity (CaO/SiO 2 ) from …
Chromite and laterite ores from local sources were smelted in a vertical tube furnace with activated carbon as reducing agent at 1400°C to 1550°C using graphite crucible under argon atmosphere. It is shown that the grade and composition of the ore are the main factors determining the feasibility of smelting a mixture of chromite and …
The preliminary study of smelting of Indonesian laterite nickel ore using PKSC as reductant shows that the best Ni extraction is 89,35%. Recommended articles. References (10) J. Kim et al ... It is found that CaF 2 would react with iron olivine and chromite to release iron and chromium. In addition, the addition of CaF 2 avails the …
Stainless steel crude alloy recovery from direct smelting of low-grade chromite, nickel laterite and manganese ores was investigated. The mixed low-grade ores were directly smelted in an elevator furnace at smelting temperatures ranging from 1550 to 1600 °C. Smelting experiments were …
study aimed at assessing isothermal reduction smelting of additional mixed samples of chromite/laterite ores to produce directly Fe-Cr-Ni metal alloys in a single route manner. Chromite and laterite ores were obtained at Zambales and Surigao del Norte provinces, Philippines. Isothermal smelting was conducted to samples, 6/94 and 35/65
The authors have since published more detailed case studies for the application of ESS technology to iron ore, titaniferous magnetite, and chromite, as well as to saprolite and ... New method of laterite ore processing: Smelting in two-zone Vaniukov furnace to ferro-nickel. In Proceedings of the Sustainable Industrial Processing Summit, …
Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite, serpentine and chromite was studied on the basis of process mineralogy. The results show that the low-grade laterite nickel ore is a typical weathering sedimentary …
There is considerable interest in the development of new processes to extract the nickel from the oxidic nickeliferous laterite deposits, as the global nickel sulphide resources are rapidly becoming more difficult to access. In comparison to sulphide ores, where the nickel-containing mineral can be readily concentrated by flotation, nickel …
Keywords Direct smelting Flux Nickel laterite ore Chromite ore Manganese ore Reductant Low-grade coal Stainless steel crude alloy 1 Introduction Stainless steel, which contains iron, chromium, and often …
Stainless steel crude alloy recovery from direct smelting of low-grade chromite, nickel laterite and manganese ores was investigated. The mixed low-grade ores were directly smelted in an elevator ...
A pyrometallurgical process was developed for the recycling of Ni bearing dusts and laterite ore fines by direct reduction smelting in DC (direct current) arc furnace. In the course of the performed industrial trials, besides the Ni-recovery in the liquid bath, slag composition was deliberately adjusted in order to produce a series of metallurgical slags …
The feasibility of producing Fe-Ni-Cr crude alloy by direct smelting of chromite and laterite ores from local sources with activated carbon as reducing agent at 1400o to 1550oC using graphite crucible under argon atmosphere were con-ducted in a vertical tube furnace . ... The smelting of 10-13% SCO chromite ore and 87 – 90% LIM …
XRD pattern of the chromite ore is shown in Figure 2. The XRD analysis illustrated that spinel The XRD result of saprolite type nickel laterite ore in Figure 3 revealed that the dominant minerals ...
W.G. Pei, and O. Wijk, "A kinetic study on chromite ore smelting reduction", Scandinavian Journal of Metallurgy, 22 (1993), 38-44. 3. E.O. Yape, and N.M. Anacleto, "Direct Smelting of Chromite and Laterite Ores with Carbon Under Argon Atmos pher", Advanced Materials Research, 849 (2014), 170-176.
Chromite and laterite ores from local sources were smelted in a vertical tube furnace with activated carbon as reducing agent at 1400°C to 1550°C using graphite crucible under argon atmosphere. It is shown that the grade and composition of the ore are the main factors determining the feasibility of smelting a mixture of chromite and laterite ores to …
mineral phases of laterite nickel ore are limonite, serpentine, chlorite, quartz, chromite and magnetite. In order to further study the beneficiability of laterite nickel ore, it is necessary to analyze the mineralogical characteristics of its main minerals by modern analytical means such as Table 1 Chemical composition of laterite nickel ore ...
A pyrometallurgical process was developed for the recycling of Ni bearing dusts and laterite ore fines by direct reduction smelting in DC (direct current) arc furnace.
Reduction–sulfurization smelting is an effective method for treating solid hazardous waste and recovering valuable components from them. In this work, a waste hydrogenation catalyst (WHC), an automotive exhaust purifier waste catalyst (AEPWC), a vulcanizer, and laterite nickel ore were mixed, and the reduction smelting behavior of …
Abstract The mineralogical characterization and occurrence of target elements in limonitic laterite from Africa was comprehensively studied by X-ray diffraction (XRD), scanning electron microscopy energy spectrum (SEM–EDS), and optical microscope (OM) measurements. The results suggest that laterite ore has a complex internal …
Metals 2019, 9, 974 2 of 16 a significant expansion in the treatment of oxide-type ores could be expected [4].For a historical perspective, a comparison of sulfide and laterite nickel mining can be found in the detailed review published by Mudd [5].According to 2003 data, the share of laterites in primary nickel production was reported to be 42%, or ~510 …
GRADE CHROMITE, NICKEL LATERITE AND MANGANESE ORES WITH LOW- ... The metallic alloy produced at 1600 0C and three hours of smelting with constant reductant/charged ore of 5% and 8% manganese ore ...