Penelitian ini dilakukan untuk mengidentifikasi karakteristik endapan laterit pada Blok Barat dan Blok Timur Pulau Sebuku, Kabupaten Kotabaru, Kalimantan Selatan dengan menggunakan metode ...
The TG-DSC-DTA of nickel laterite, chromite and manganese ore were analyzed and the results are illustrated in Fig. 4. As shown in Fig. 4 (a), the weight loss process of nickel laterite can be basically completed at nearly 1000 °C with weight loss ratio of 12.42%. Therein, the desorption of absorbed water started around at 123.4 °C with the ...
Despite their relatively high Mn, Zn and Co contents in the whole Ni-laterite ore, only chromite dispersed within the Kastoria deposit exhibits a significant Mn, Zn or Co-enrichment in the ferroan chromite zone, in contrast to the Palaiochori deposit. Assuming that the Mn 2+ Zn 2+ Co 2+ -enrichment has taken place after re-deposition of the ...
The XRD pattern of the laterite ore sample as received (Figure 2), permits the identification of actinolite, quartz, hematite, goethite, chromite, lizardite, chlorite, and talc. The main nickel carrier in this ore was chlorite (nickel distribution in the range from 70 to 80 pct), followed by goethite (9 to 25 pct), and lizardite (5 to 10 pct).
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 ...
Therefore, 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. Figure 5: Metal Concentration of the Alloy with Varied Ore ...
chromite, and hydrous Mg- and Ni-rich silicates. At the top of the saprolite is a transition into a clay-rich layer. Above the clays is a limonite layer with goethite, maghemite, hematite, gibbsite, and Mn- ... silicate minerals in the hydrous Mg-silicate type Ni laterite ore, which include the poorly crystalline garnierite group, sepiolite ...
The results show that the low-grade laterite nickel ore is a typical weathering sedimentary metamorphic oxidized ore, with the main valuable elements of Ni, Co and Cr and the main …
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 studied. The results …
The case of the perlite of the island of Kos C.I. Panagopoulos, D.A. Labrakis & A.A. Mavrikos 49 Preliminary results of the study of toxic elements in soils and crop plants in areas of Ni-Mo black shale-hosted deposits (Zunyi region, south China) J. Pašava, B. Kříbek, K. Žák, L. Chaoyang, H. Deng & Z. Mingguo 53 Metallic resources status ...
The association of metals such as Mg, Ni, Mn and Co with goethite has been rigorously studied by previous researchers [10], but fewer studies have been completed on the metals association within low grade laterite ore. In this work, low grade nickel laterite sample from Indonesia for a subsequent Ni enrichment mechanism was studied to ...
Objective: To investigate the reduction of mixed chromite and laterite ores which were obtained from Zambales and Surigao Del Norte provinces to produce iron (Fe)-chromium (Cr)-nickel (Ni) metal alloys.Methods: Raw ores were mixed according to eutectic point of MgO-Al2 O3 -SiO2 ternary phase diagram for which samples are melted at 1600ºC.. Isothermal reduction of …
In addition, nickel laterite ore also contains trace amounts of chromite, which is mainly produced in idiomorphic or semi-idiomorphic granules. The particle size of chromite is …
The nickel laterite ore from the Southeast Ophiolite Belt, Sulawesi Island, Indonesia, was used in these experiments. ... In addition, nickel laterite ore also contains trace amounts of chromite, which is mainly produced in idiomorphic or semi-idiomorphic granules. The particle size of chromite is about 400 μm and shown in Fig. 11 b.
different varieties of chromite ore present in the area are massive, banded and spotted, laminated and friable. The grain size of chromite varies between 0.25 and 4 mm, and ... profile of nickeliferous limonite and laterite. Their oc- currence at various places and depths could only be located and exposed by geophysical prospecting and pitting ...
In recent years, the major nickel source of stainless steel has been converted from nickel sulfide ore into nickel laterite ore due to the massive consumption of the former [1, 2].In addition, limonitic nickel laterite accounts for about 60% of the total nickel laterite resources [].The abundant nickel laterite ore is generally used for ferronickel preparation through …
The mineralogy of the laterite ore indicates that due to the complicated association of the various phases and the variable distribution of Ni, this refractory laterite ore can not be upgraded by traditional physical beneficiation processes. Recommended articles ... Based on the complementary advantages of limonitic nickel laterite and chromite ...
Chromite is found in beach sands derived from the weathering of chromite-bearing rocks and laterite soils that developed over peridotite. Beach sand rich in chromite and other heavy minerals is sometimes mined, processed to remove …
Nickel laterite minerals are very complex, yet the ore demand is very high due to India's only source of nickel and cobalt. Chromite overburden is waste heaped at mines and consisting of laterite ore with < 1 wt% of nickel concentration. Due to the depletion of high-grade sulfidic ore, there is a rise in demand for low-grade laterite ore and ...
Chromite morphology indicate formation in a supersaturated parent melt under changing cooling conditions. Chromite geochemistry indicate a highly depleted and reduced melt of boninite-type affinity. Dissolution of chromite occurred by abiotic and biogenic means.
Chromite overburden is waste heaped at mines and consisting of laterite ore with < 1 wt% of nickel concentration. Due to the depletion of high-grade sulfidic ore, there is a rise …
SCO chromite ore and 87 – 90% LIM laterite ore produced alloys with average iron, nickel and chromium content about 82%, 6.22% and 2.17%, respectively, at an average iron, nickel and chromium recovery of 98%, 97% and 87%, respectively. The high recovery of iron and nickel in the alloy indicates a high reducing condition in the smelting ...
The major chromite ore and concentrates producing countries are South Africa, India and Kazakhstan, representing 70% of 2008 world production as a whole. ... These are mainly associated with laterite, altered ultramafic rock, nickeliferrous limonite, goethite and talc serpentine schist. Based on physical characteristics, Orissa chrome ores are ...
Nickel laterite ore acid leaching residue is an excellent secondary resource, rich in valuable elements such as iron, magnesium, and silicon(Stamboliadis et al., 2004). By comprehensively …
The invention provides a kind of chromite fine ore sintering processing method produced for stainless steel, chromite powder is mainly carried out granulation sintering by the method after laterite, because the wettability of laterite and water is good, in pelletization, laterite just can adhere to as forming core particle and chromite fine ore mutually grows up, granulate …
The laterite ores are mainly classified into two types: limonitic ore and saprolitic ore, while raw laterite ores of hydrometallurgy mainly are limonitic ores, ... In the process, hematite and chromite were converted to metal iron in the non-molten metallization reduction. The final product, namely, high grade iron powder can be sold as a kind ...
Chromite ore is the essential raw materials of ferrochrome. Around 90% of mined chromite ore are used to producing ferrochrome by the metallurgical industry, ... Thus, nickel laterite ore processing has attracted much greater attention in recent years [9, 10]. Moreover, with the depletion of high grade lumpy chromite ores and nickel laterite ...
The smelting of 10-13% SCO chromite ore and 87 – 90% LIM laterite ore produced alloys with average iron, nickel and chromium content about 82%, 6.22% and 2.17%, respectively, at an average iron, nickel and chromium recovery of 98%, 97% and 87%, respectively. The high recovery of iron and nickel in the alloy indicates a high reducing condition ...
Balango et al. [65] smelted calcinated chromite ore and nickel laterite in a vertical resistance heated furnace. The aim was to investigate the simultaneous smelting of nickel and chromium-bearing ...
The raw nickel laterite ore in PT INCO ferronickel plant in Indonesia contains 15% - 25% water, which belongs to dry laterite ore. The deposit is divided into two parts: east area and west area. The ore preparation …
Throughout the Ni laterite profile, Cr(VI) was found to be lower in the upper laterite horizon likely due to the unit's acidic nature and higher amounts of organic matter and …
EMI is a Filipino mining company specializing in nickel laterite mining operations. EMI was established in 2002 and commenced production at its mine in Zambales Province in 2011. EMI focuses on the extraction of mineral commodities including nickel laterite ore, cobalt, chromite, and other associated minerals. Project Background
Chromite: Approximately 30 million metric tons of chromite ore are in Oman, according to the Oman Chromite Company. Oman is exporting metallurgical grade chromite ores in response to rising demand from China and shortages of ferrochrome worldwide.
The principal ore mineral present is chromite, which occurs as relatively large (0.1–3 mm) subhedral grains with minor overgrowths of ferritchromit and magnetite (Figure 4 A). The grains are commonly highly …
