[16][17] [18] [19][20] Many studies on the thermal analysis of laterite nickel ore report that the free water is removed at temperatures between 333 K and 383 K, dehydration occurs at 553 K, the ...
ادامه مطلبPart 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
ادامه مطلبgrade and composition of chromite and laterite ores are the main factors to produce the alloy. The smelting of 10-13% SCO chromite ore and 87 – 90% LIM laterite ore …
ادامه مطلبThe 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 …
ادامه مطلبThere is no point smelting a chromite ore if breakeven cannot be achieved. During chromite smelting, energy requirement and its cost depend to a large extent on the technology used in smelting the ore. New process technologies have been developed to reduce energy required for smelting chromite to ferrochrome.
ادامه مطلبTo 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).
ادامه مطلبA 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.
ادامه مطلبThe demand for alternative low-grade iron ores is on the rise due to the rapid depletion of high-grade natural iron ore resources and the increased need for steel usage in daily life. However, the use of low-grade iron ores is a constant clinical task for industry metallurgists. Direct smelting of low-grade ores consumes a substantial amount of …
ادامه مطلبthe technology used in smelting the ore. New process technologies have been developed to reduce energy required for smelting chromite to ferrochrome. These technologies, …
ادامه مطلبAbstract 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 …
ادامه مطلبThe 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, …
ادامه مطلبChromite reduction by carbon dissolved in a high carbon ferrochromium alloy melt has been investigated in the temperature range 1580-1640°C using a slag system based on CaO2-FeO-Cr2O3-SiO2-Al2O3. Although the reduction is essentially first order with respect to Cr2O3 concentration, it exhibits both zero order and first order reaction …
ادامه مطلبNickel 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 …
ادامه مطلبTherefore, the optimum charge combination chosen in the study was 85% of saprolite type nickel laterite ore (N2) and 15% chromite ore (COZ) with metallic alloy which was produced in three hours of smelting with 5% coal addition as 56.22% Fe, 17.71% Cr, 5.16% Ni, 0.27% Mn and 10.84% Si.
ادامه مطلبFerrochrom 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 …
ادامه مطلبChromite 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 …
ادامه مطلبstudy 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
ادامه مطلبLimonitic 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 …
ادامه مطلبThe 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.
ادامه مطلبMetals 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 …
ادامه مطلبFeasibility 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, …
ادامه مطلبBalango et al. [65] smelted calcinated chromite ore and nickel laterite in a vertical resistance heated furnace. The aim was to investigate the simultaneous …
ادامه مطلبProcess 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 …
ادامه مطلبReduction–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 …
ادامه مطلبSemantic Scholar extracted view of "Development of ferro-nickel smelting from laterite in Japan" by K. Ishii. ... The enrichment of Ni from a low-grade saprolitic laterite ore, which has been pre-treated by high pressure grinding roller ... The management of huge volumes of overburden at chromite mines is a concern, and there is a need to make ...
ادامه مطلبChromite 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 …
ادامه مطلبThe 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 …
ادامه مطلب2.5 Smelting Processes Different chromite and laterite mixtures for reduction smelting were selected on the bases of possibly obtaining higher amounts of chromium and nickel in the metal and Figure 1. Point locations of the ore compositions in the MgO-Al2O3-SiO2 Ternary phase diagram at 1 atmospheric pressure.
ادامه مطلبmineral 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 ...
ادامه مطلبA 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 …
ادامه مطلب