IDENTIFIKASI LIMONITE, SAPROLITE, DAN BEDROCK …
1 Mengidentifikasi Limonite, Saprolite, dan Bedrock pada Nikel Laterit (Studi Kasus PT. Sulawesi Cahaya Mineral) Nikel Laterite memiliki beberapa lapisan yang mana masing-masing lapisan tersebut
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Study of selective reduction in lateritic nickel ore: Saprolite versus
Both for limonite and saprolite, without the addition of sodium sulfate, the high intensity of ferronickel was found higher than with the addition of additives, as shown in Fig. 7. Nevertheless, from Fig. 6, it has a lower nickel grade in concentrate. Sodium sulfate is acted as an inhibitor for iron metallization in the selective reduction process.
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Thermal Upgrading Effect: Saprolite versus Limonite
The mineralogical properties of saprolite and limonite from Indonesia were investigated by X-ray diffraction, X-ray fluorescence, atomic absorption spectro-photometer, field-emission scanning electron microscopy, and differential thermal analysis.
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Thermal Upgrading Effect: Saprolite versus Limonite
In this research, the thermal upgrading efect will be investigated on saprolite vs limonite by using material characterization to give information on the optimal process for extracting them. …
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A Study on Classification of Limonite and Saprolite …
Nickel laterite ore is classified into two principal ore types: saprolite (silicate ore) and limonite (oxide ore). Saprolite-type ore characterized by high magnesia and silica contents is treated by pyrometallurgy process. On the …
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Thermal Upgrading Effect: Saprolite versus Limonite
The mineralogical properties of saprolite and limonite from Indonesia were investigated by X-ray diffraction, X-ray fluorescence, atomic absorption spectro-photometer, …
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Nickel Laterites: The World's Largest Source of Nickel
The saprolite and limonite zones tend to contain the higher grades of Ni and can range from 1.5-3% and 1.2-1.7% respectively. How do they form? Many factors affect the formation of nickel laterites, including the original rock the soil develops from, the climate, the rate in which weathering occurs, drainage of groundwater and the tectonic setting.
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Studies of carbon percentage variation and mixing Saprolite-Limonite …
The optimum carbon percentage of saprolite and limonite is the concerned purpose for this research. The ratio of saprolite and limonite (solid: solid) are 1:4 and gave heat treatment at 1150 °C ...
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Geochemical and Physical Characteristics of Nickel …
Soil 3 meters, Limonite 14 meters, Saprolite 15 meters, and Bedrock 5 meters. Geochemical results were found in the Limonite and Saprolite zones are very interesting. Limonite has an average content of Ni 0.91%, Co 0.13%, Fe 45.03%, SiO 2 4.13%, MgO 1.08%, and Al 2 O 3 14.18%. The highest ore elemental content and ore elements
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Open Access proceedings Journal of Physics: Conference …
three composition of samples: limonite, saprolite, and mixed of them. The mixed samples are made by mixing saprolite with limonite with a ratio of 1: 1 (% by weight). The chemical composition listed in table 1. Table 1. Chemical composition of sampel limonite, saprolite and mix saprolite-limonite 1:1 (%w/w). Ore Ni Total Fe Total MgO SiO. 2. Al ...
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Identifikasi Limonite Saprolite Dan Bedrock Pada Nickel …
Dokumen tersebut memberikan panduan untuk mengidentifikasi tiga lapisan utama pada nikel laterit yaitu lapisan limonite, saprolite, dan bedrock berdasarkan ciri-ciri fisik dan mineralnya. Lapisan limonite ditandai dengan warna kuning dan merah serta mengandung mineral besi, manganese, dan hematite. Lapisan saprolite berwarna hijau dan mengandung mineral nikel …
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Difference value between limonite and saprolite depth from …
Besides that, the depth differences between limonite and saprolite bottom from borehole data and those interpreted by GPR and ERT data are summarized in Table 2. In the interpretation of limonite ...
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Our Business — Nickel Asia Corporation
Our saprolite ore comes in two types: high-grade and mid-grade, while our limonite ore are high-iron and low-grade. Most of our high-grade saprolite ore are sold to Pacific Metals Co., Ltd. …
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(PDF) Atmospheric acid leaching of nickel …
Rather than employing an appropriate limonite/ saprolite ore blend, pilot work on this process involved pugging of a limonite/acid mixture and subsequent grinding of the cured pug with crushed saprolite to prepare the leach slurry (Verbaan et …
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Study of selective reduction in lateritic nickel ore: Saprolite …
Saprolite has higher basicity than limonite. The difference between magnesium and silicon oxide in lateritic nickel ore plays an important role in the selective reduction process. Therefore, in this work, the selective reduction of saprolite and limonite was carried out to reveal the effect of lateritic nickel ore basicity (MgO/SiO 2 ratio) on phase transformation and …
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Ni(Co) Laterite Deposits of Southeast Asia: A Review and …
The saprolite and limonite layers of Ni laterites of SE Asia generally display an increase in Ni contents relative to those of the bedrock, which can be explained by ion exchange processes between the weathering solution and primary minerals [27,30,31,32,33,34,67].
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Kinetic study in selective reduction of limonitic and saprolitic …
Saprolite and limonite have different behaviour in the carbothermic reduction process due to the differences in their atomic structures. This work investigates the kinetic …
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Thermal Upgrading Effect: Saprolite versus Limonite
According to DTA, saprolite and limonite have the same phase transition from goethite to hematite at low temperatures (250 °C); at 900 °C the magnesioferrite crystallization for limonite and the crystallization of forsterite for saprolite, and the growth of ferronickel in 1150 °C; however, transformation of lizardite at 600–700 °C for ...
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IOP Conference Series: Earth and Environmental Science …
off) obtained by the boundary zone of limonite-saprolite and saprolite-bedrock boundary for each point of the drill. The entire drill data on the track then correlated to form a cross-section shown in Figure 2. The divisions own profile in accordance with that proposed by Waheed (2009). It was clear enough
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Studies of carbon percentage variation and mixing Saprolite-Limonite …
The ratio of saprolite and limonite (solid: solid) are 1:4 and gave heat treatment at 1150 °C with 1 h holding time and magnetic separation for getting to know the optimum nickel grade and recovery. All samples are analyzed with XRD, ICP, and SEM-EDS to get info on the phases, element percent, and morphology.
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KARAKTERISTIK PENGAYAAN LOGAM SKANDIUM (Sc) PADA …
Laterite nickel deposits are divided into several zones is overburden, limonite, saprolite and bedrock. The division of zones is based on physical and geochemical characteristics. The process of enrichment of nickel metal (Ni) in laterite nickel deposits is concentrated in the saprolite zone. During the weathering and enrichment process in ...
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Kinetic study in selective reduction of limonitic and saprolitic …
Saprolite and limonite have different behaviour in the carbothermic reduction process due to the differences in their atomic structures. This work investigates the kinetic study of these two ...
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Geochemical and Mineralogical Characteristics of Garnierite …
The limonite horizon is a reddish-brown soil consisting of clay minerals. It is 2–7 m thick with a undulating boundary between limonite and saprolite at some places. Two distinct zones are recognized in the limonite horizon, the lower yellow limonite and upper red limonite.
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Laterite-saprolite Au
SYNONYM: Eluvial gold placers (Boyle, 1979), Au-bearing saprolite (Becker, 1895). DESCRIPTION: Au disseminated in laterite and saprolite that developed under conditions of tropical weathering (fig. 32) over a wide variety of bedrock types but distal to known bedrock gold deposits. Figure 32. Idealized cross section of laterite-saprolite Au deposit.
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Study of selective reduction in lateritic nickel ore: Saprolite …
The nickel grade in saprolite's concentrate is higher than limonite due to its higher nickel content in saprolite ore. Nevertheless, the saprolite's recovery of nickel and iron is lower …
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Our Business — Nickel Asia Corporation
We produce two types of nickel ore, namely saprolite ore and limonite ore. Our saprolite ore comes in two types: high-grade and mid-grade, while our limonite ore are high-iron and low-grade. Most of our high-grade saprolite ore are sold …
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A Study on Classification of Limonite and Saprolite from …
In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% ...
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Are Days Numbered for Indonesia's Kilns?
Lateritic soil sequences are formed from the weathering of rocks in circumstances conducive to leaching and oxidation; limonite is formed higher up in the sequence, with saprolite lower in the orebody. Indonesian nickel ore grades for limonite are generally in the range of 0.8% to 1.5%; for saprolite they may exceed 1.8%.
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Comparative Analysis of Water Content in Laterite Nickel …
Comparative analysis of water content in limonite and saprolite zone laterite nickel deposits in the North Morowali Region needs to be known for mine planning needs. The presence of water in the limonite and saprolite zone samples is influenced by groundwater or water infiltration from the surface. Factors that affect the
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Analisis Perbandingan Pencampuran Bijih Nikel High Grade …
The aim of this research is to determine the Ni content of high grade limonite and low grade saprolite at the research location, and to determine the Ni content of high grade limonite and low ...
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