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Nickel and cobalt were extracted from low-grade nickeliferous laterite ore using a reduction roasting-ammonia leaching method. The reduction roasting-ammonia leaching experimental tests were chiefly introduced, by which fine coal was used as a reductant. The results show that the optimum process conditions are confirmed as …
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The results show reduction roasting followed by magnetic separation is effective for upgrading nickel ores, but challenges with this technology are the potentially high reagent usage and temperatures required.
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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 its recovery is limited during smelting. Due to the inefficient utilization, the accumulated Cr-containing slags are potential environmental risks. This work provides positive results …
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Therefore, numerous investigations in vogue on laterite enrichment performed spanning from 1964 to date were reviewed in this article, and the future directions were proposed through critical synthesis. ... Hence, in order to improve on the reported Ni yields from selective comminution-classification process, one of the ways …
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nickel/cobalt from laterite leach liquors and the collaborative development of the Direct Nickel process. Future opportunities and key research questions will be briefly examined. KEYWORDS
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A beneficiation process for enriching nickel and/or cobalt involves the steps of dividing nickel laterite into limonite type ore and serpentine type ore to beneficiate separately; classifying by screening at least one time after washing the ore; beneficiating separately the products of the various grades obtained; further classifying by gravity separation and …
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The preconcentration of nickel (Ni) laterite ores ahead of Ni recovery by hydrometallurgical processing makes good economic sense. Since Ni-bearing minerals are often finely disseminated through laterite ores, liberation of minerals either high and/or low in Ni content is a prerequisite prior to any form of separation process.
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Beneficiation of Arid-region Nickel Laterites For pre-concentration, a selective …
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The physical beneficiation of nickel (Ni) laterite ores is clearly a potential …
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Nickel laterite HPAL circuits are known for their complexity and have presented a large number of challenges to process engineers worldwide. An attitude commonly encountered by the author is that the beneficiation of the ore is relatively simple and that the difficult problems are in the realms of hydrometallurgy. On a number of occasions beneficiation …
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The sample is NAPL laterite residue from Sichuan province, China. The liquefaction method of laterite residue is as follows: The laterite residue was dissolved by mixed acid (the volume of hydrochloric acid: nitric acid: hydrofluoric acid is 3:1:3) at 120 °C for 30 min. After cooling to 25 °C, the beaker was washed by deionized water.
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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 ...
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goethite as principal iron minerals with laterite in vary-ing amounts. Alumina content of these ores, which was generally high, was mainly contributed by the presence of laterite, although clay and felspars were also present to some extent. In all the hematitic ore samples, the alumina content was generally higher than the silica
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Learn how nickel laterite ores, which contain both limonite and saprolite layers, are processed via hydrometallurgical (SX-EW) or …
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The hydrometallurgical process of nickel laterite leaves a residue that still contains valuable elements. Its utilization can improve overall process efficiency and reduce environmental damage. In ...
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This review summarizes the latest nickel laterite upgrading studies reported in the literature which use physical beneficiation – only studies reported after the most recent review in 2015 ...
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leaching (HPAL), Caron process, and direct nickel process (DNi) are the most common processes to treat lateritic ore [4]. HL process can be processed at ambient temperature, but it is a kinetically slow process, and the yield is low compared to AL and HPAL [5]. AL requires 1 bar pressure and tem-perature in the range of approximately (50–90 °C).
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Phosphate Beneficiation. Background. Definition of "Beneficiation": This is the second step in the mining process, after removal of the ore from the ground. Beneficiation is the technical term describing the industrial process of …
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The processing of nickel laterites has been a topic of major interest at CSIRO for almost twenty years. During this period CSIRO has collaborated with other researchers and industry in developing ...
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With the rising demand for nickel and cobalt, laterite residue containing chromium is extensively generated through the laterite hydrometallurgical process, posing a significant burden on environmental protection and the sustainable development of the nickel industry. This study presents a novel and environmentally friendly method for ...
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The Rio Tuba Ni laterite deposit (Fig. 1 b) is situated 800 km southwest of Manila and lies at the municipality of Bataraza at the southern tip of the narrow NE-SW trending Palawan province (Fig. 1 a).The deposit is characterized by a thick (~20 m) well-developed Ni laterite profile (Ogura et al., 1987) derived from the Late Cretaceous …
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This study investigated the recovery of nickel from tailings (0.2% Ni) obtained in a chromite beneficiation plant using H2SO4 leaching followed by oxalic acid precipitation.
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an environmentally friendly electrowinning process by significantly reducing nickel emissions and notably improving working conditions for operators. This technology also reduces operating costs and enables fully automated process and oxygen recovery from the electrowinning process. Nickel and cobalt sulfate production for battery
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1. Introduction. The increasing consumption of stainless steel immensely promotes the demand of nickel [1].As sulfide nickel ore has been depleted gradually, the effective utilization of laterite nickel ore, accounting for approximately 72 percent of global nickel resources, becomes extremely urgent [2].Based on consideration of the economic …
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International Laterite Nickel Symposium - 2004 m-nt for Pros- Edited bv W.P. Imrie. D. M Lone, S.C.C. Bamett. ... As part of the risk management process for the Ravensthorpe Nickel Project, BHP ...
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In the reduction roasting-ammonia leaching process, various metal oxide minerals within nickel laterite were reduced by coal at 600–900 °C first. Minerals always tend to undergo phase transformation …
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Approximately 80% of the hydrometallurgical process of low-grade laterite nickel ore is converted into residue. The handling of residues from processing is a significant challenge in this process According to the characterization test, each type of extraction process produces a different type of residue.
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DOI: 10.1016/J.MINENG.2012.03.012 Corpus ID: 93636673; Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate @article{Li2012BeneficiationON, title={Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate}, author={Guanghui Li and Tangming Shi and …
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Abstract A new process is developed for metallurgical beneficiation of iron laterite nickel-containing (limonite) ores with the formation of a metallic nickel–cobalt concentrate. This process includes reducing roasting of the ores with sulfur-containing additions in the temperature range 1100–1200°C, the fragmentation of the roasting …
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The incentive for the present research was to develop a new carbothermic reduction process for nickel laterite ore that would produce a higher grade of nickel than current industrial techniques ...
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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.
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The reduction roasting ammonia leaching process (RRAL) originally defined by Caron (1950) has been extensively applied to treat low grade nickel laterite and a large amount of slag-containing some valuable metals, has been generated and accumulated over the years since then. However, there are no reports on how to utilize it …
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The leaching process of pre-roasted laterite ore was found to be controlled by diffusion through the ash layer, with activation energy values of 20.97 and 18.97 kJ/mol for laterite roasted at 280 ...
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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 …
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Barite (barium sulphate) often occurs as large veins or beds, as gangue mineral in various mineral veins, in limestones, sandstones and like deposits. The ores are generally low grade and require concentration by flotation to meet market specifications. Barite, which has the ability to influence other materials with its basic characteristics, …
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