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  • Utilization of limonitic nickel laterite to produce

    2019-2-1 · The limonitic nickel laterite ore is beneficiated by the selective reduction roasting-magnetic separation process. • The mechanism of calcium sulfate and silica in promoting selective reduction of limonitic nickel laterite ore was revealed. • Growth behaviors of ferronickel particles in the reduction roasting process are clarified.

  • Kinetic Studies of the Reduction of Limonitic Nickel

    2020-4-21 · A sample of limonitic nickel ore was characterized by XRD, SEM-EDS, and ICP-OES techniques. The Rietveld refinement method showed that the main mineral constituent of this sample is goethite (55.8 pct).

  • Direct Reduction of Limonitic Laterite Nickel Ore with

    When laterite nickel ore was reduced by mixed gas with a CO 2 /H 2 ratio of 9/1 and a gas flow of 100mL/min at 800°C for 1h, a product with a Ni metallization rate over 95% and a Ni/Fe ratio as much as 2.6 was prepared. 814. SiO 2 /MgO Ratio Effect on Carbothermic Reaction of Synthetic Nickelliferrous Mixtures.

  • The sintering character of limonitic nickel laterite

    Chapter. 765Downloads. Abstract. The world’s proven nickel resources are about 113 million tons, less than 30% for sulfide, more than 70% for nickel laterite, while only approximately 40%) of current production is derived from laterites in both limonite and saprolite.

  • Selective Reduction of Laterite Nickel Ore

    Limonitic nickel ore contains iron oxide in the form of goethite (¡-FeO·OH). The limonitic nickel ore is also relatively rich in cobalt and chromium. Iron oxide from limonitic nickel ore has an amorphous crystal structure with a crystal size in a nanometer scale and a large surface area.

  • High pressure acid leaching of a refractory lateritic

    2011-9-1 · To test the ore sample, a slurry of 150 g of limonitic nickel laterite ore was prepared with deionized water according to a predetermined solid/liquid ratio of 30 wt.% solids. After the slurry was prepared in the autoclave, technical grade sulfuric acid (96–98 wt.%) was added and the lid of the autoclave was closed carefully in order to prevent any leakage during the high

  • Selective leaching of nickel from prereduced limonitic

    2016-10-31 · In this paper, the selective acid leaching of nickel from the pre-reduced limonitic laterite under moderate HPAL conditions was studied. For the calcine with reduction degree of 93.4%, about 88.2% nickel could be selectively extracted at 100°C with an acid/ore ratio of 0.164, leaving less then 5.0g/L iron in the solution.

  • Separation of iron-nickel alloy nugget from limonitic

    2018-12-27 · Nickel laterite ores generally consist of three main layers. The layer close to the surface is the limonitic ore body, the layer near to the bottom of the ore body is the saprolitic ore body, and the limonitic ore can be separated from the saprolitic ore by a transition zone.

  • Teck's CESL Nickel Process: Advancing Towards a

    2015-11-20 · Disseminated nickel ore bodies are widely distributed around the world and are found in most of the known nickel sulphide districts. Teck has developed a novel hydrometallurgical process for treating balance of nickel supply comes from limonitic and saprolitic laterite deposits which represent an abundant nickel resource. [1,15]

  • Atmospheric pressure leaching of nickel from a low-grade

    2018-6-27 · maximum recovery of nickel were determined under the following conditions: 5 M H2SO4, 25% (w/v), 90 ºC, and two hours. Pre-calcination, for increasing nickel extraction by converting goethite to hematite, was carried out on raw ores at different times (30-180 minutes) and temperatures (180-540 ºC). Recovery

  • (PDF) Reducibility of nickeliferous limonitic laterite

    Limonitic nickel laterite from Sivrihisar reserve in Turkey was reduced at 700–1100°C by the addition of 5·74, 8·61 and 11·48 wt-% coal under an argon atmosphere.

  • 镍:第三篇第一章《镍矿—镍矿概述》 知乎

    2018-9-30 · 第二层:Limonitic Nickel Ore(镍褐铁矿)Ni 1.4-1.9% Fe 20%-30% 第三层:Saprolite Nickel Ore(腐泥土镍矿)Ni 2.0-2.6% Fe15% 左右 图 1:红土镍矿成矿图 (3)开采方法 红土镍矿为露天开采,作业设备简单,通常包含如下几个步骤: ①推土机清理和剥离

  • Selective Reduction of Laterite Nickel Ore

    Limonitic nickel ore contains iron oxide in the form of goethite (¡-FeO·OH). The limonitic nickel ore is also relatively rich in cobalt and chromium. Iron oxide from limonitic nickel ore has an amorphous crystal structure with a crystal size in a nanometer scale and a large surface area.

  • Separation of iron-nickel alloy nugget from limonitic

    2018-12-27 · Nickel laterite ores generally consist of three main layers [3]. The layer close to the surface is the limonitic ore body, the layer near to the bottom of the ore body is the saprolitic ore body, and the limonitic ore can be separated from the saprolitic ore by a transition zone. Because of the low nickel content and

  • Recovery of nickel and cobalt as MHP from limonitic

    Recovery of nickel and cobalt as MHP from limonitic ore leaching solution: Kinetics. analysis and precipitate characterization. Nina Safitri, M. Zaki Mubarok, Ronny Winarko, and Zela T anlega.

  • Open Access proceedings Journal of Physics: Conference

    Limonitic ore consists of nickel oxide and cobalt oxide. Nickel and Cobalt in sulfate form are material sources for electric car battery. Therefore, the project will support the Indonesian government program in electric vehicle development. The Indonesian government has stated that fuel oil and air pollution can be reduced by increasing

  • Kinetic study on leaching of nickel from Turkish lateritic

    2016-1-6 · was a typical limonitic laterite ore with high iron content. It was ground to size less than 106 µm for acid leaching. The elemental composition of the sample is given in Table 1. Table 1 Elemental analysis of lateritic nickel ore sample [35] Element Ni Fe Mg Co Mass fraction/% 1.84 23.14 1.58 0.03 XRD pattern of the ore sample is given in Fig. 1.

  • Limonitic Laterite Ore as a Catalyst for the Dry

    2016-8-9 · We investigated four catalysts for the dry reforming of methane: three Ni-containing natural iron ores (LN, SN, and NN ores) and one Ni-supported ore (Ni-supported NN ore) to solve the problems about unused high-temperature waste heat and CO2 emission in the steel industry. The CO2 conversion ratio was highest for the LN ore (1.18 wt % Ni), followed by Ni-supported

  • Leaching behavior of metals from limonitic laterite ore by

    2011-1-26 · 125 kg/t ore to 400 kg/t ore at 250 °C with leaching time of 1 h and L/S ratio of 3:1(i.e. 3 L water and 1 kg ore). From the results shown in Fig.3, it can be found that the nickel extraction efficiency obviously increases with the increase of sulfuric acid added and reaches to 98% when the amount of acid added is up to 250 kg/t ore, and with

  • Atmospheric pressure leaching of nickel from a low-grade

    2018-6-27 · Keywords: nickel recovery, laterite ore, leaching, calcination, kinetics 1. Introduction Nickel is an important metal used for a wide variety of applications. The world’s various deposits of nickel are in the forms of sulfide and oxide (laterites) ores. Currently, the majority of nickel