olivine flotation flow - search results

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olivine flotation flow - search results

Effect of acid surface dissolution pretreatment on the ...

The microflotation experiments show that after surface dissolution, the flotation recovery of ilmenite improves from 73.5% to 92.1% at a pH of 6.3, while that of olivine-pyroxene decreases from 59 ...

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Quantifying rheological and fine particle attachment ...

This work studied the effect of two common magnesium-bearing silicate minerals in sulphide ores (i.e. pyroxene and olivine) on the flotation of pyrite which was used as a model sulphide mineral.

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Author's personal copy

liquidus olivine and pyroxene flotation can exist in the mantle of the Earth's Moon (Circone and Agee, 1996; Smith and Agee, 1997; Delano, 1990). Ohtani et al. (1995)were among the first to propose that the early martian mantle might be subject to crystal liquid density crossovers. Recent work (McSween et al.,

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Olivine Flotation in Mantle Melt | Lamont-Doherty Earth ...

Office of Marine Operations. R/V Marcus G. Langseth; Cruises; Cruise Planning; Marine Mammal Protection; LDEO Ship History

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MIDDLE AMERICA TRENCH AREA OFF MEXICO

Basaltic rocks recovered at the Middle America Trench area off Mexico are typical plagioclase-olivine phyric ... Flotation must have occurred at relatively high pressure. Large crystals of plagioclase and smaller crystals of olivine are xenocryst ... the flow, contains larger amounts of phenocrysts than Samples 487-93-95 and 487-118-120 (Fig. 1 ...

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Si and O diffusion in olivine and implications for ...

1. Introduction [2] Plastic flow in the upper mantle sustains tectonic activity on Earth and the rheology of ferromagnesian olivine, the overwhelmingly dominant mineral in this region has consequently been the subject of numerous theoretical and experimental investigations (e.g. see recent reviews in Poirier, Evans and Kohlstedt, Karato and Karato and Jung).

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Reactive flow as dominant evolution process in the ...

The Jurassic Pineto ophiolite from Corsica exposes a ~1-km-thick troctolite–olivine-gabbro sequence, interpreted to represent a lowermost sector of the gabbroic oceanic crust from a (ultra-)slow spreading system. To constrain the petrogenesis of the olivine-gabbros, minor and trace element analyses of olivine (forsterite = 84–82 mol%) were carried out. Olivine from the olivine-gabbros is ...

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SEPARATION OF CHROMITE FROM OLIVINE BY ANIONIC …

FROM OLIVINE BY ANIONIC COLLECTORS Chromite is concentrated mostly with shaking tables and spirals. Flotation can be considered as a leading process to beneficiate the fine chromite which cannot be enriched by gravity separation. Because of the complex nature of chromite and olivine which is the most abundant adjoininig

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The evolution of a global magma ocean with olivine flotation

We investigate the thermal evolution of a global magma ocean divided by a dunite septum into a shallow and a lower part with help of simple stability estimations and cooling time calculations. It comes out that the septum is not stable against thermal convection so that this mechanism for a separated chemical evolution of the two mantle regions does not work.

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Olivine - an overview | ScienceDirect Topics

G.V. Rao, in Encyclopedia of Separation Science, 2000 Lateritic Nickel Resources. Lateritic nickel resources are formed when peridotite, an igneous rock comprising predominantly the mineral olivine, which contains around 0.25% Ni, are exposed to prolonged and intense chemical weathering.During such prolonged weathering, the magnesium and silica are leached out of the rock to leave a residue ...

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A flow law for ilmenite in dislocation creep: Implications ...

Here we present a dislocation creep flow law for pure ilmenite deformed in axial compression. We use the new flow law to make predictions about the viscosity of ilmenite-olivine aggregates, the effect of low-viscosity ilmenite on lunar cumulate mantle overturn, and the fate of overturned IBC surrounding the lunar core. 2 Experimental Methods

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RHEOLOGY OF ILMENITE AND ILMENITE-OLIVINE …

predict a volume-weighted aggregate flow law based on end member flow laws. Predicted viscosities for ilmenite-olivine aggregates at the differential stress condition of experiment W1870 are shown in Figure 2. The dashed line is the isostrain bound and the dash-dotted line is the isostress bound which are robust upper and lower limits

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Olivine flotation and settling experiments on the join ...

Olivine flotation and settling are rapid in a time period of only a few hours because viscosities are a little greater than that of paraffin oil at room temperature. Some adcumulate textures with good triple junction grain boundaries are developed. General observations of differentiated magmatic systems on a number of scales and experimental ...

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The ascent of kimberlite: Insights from olivine - NASA/ADS

Olivine saturation is constrained to occur at pressures <1 GPa; an absence of decompression cracks within olivine overgrowths suggests depths <25 km. Late stage (<25 km) resurfacing and reshaping of olivine by particle-particle milling is indicative of turbulent flow conditions within a fully fluidized, gas-charged, crystal-rich magma.

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Static compression and olivine flotation in ultrabasic ...

Olivine flotation provides an important constraint upon Earth evolution models that include extensive melting during early differentiation. It also provides a mechanism for concentrating high Mg/Si olivine in the upper mantle without unduly perturbing other geochemical parameters. A full evaluation of the physical and geochemical consequences ...

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The Open Chemical Engineering Journal

chromite has been carried out prior to carbonation, by flotation in a lab-scale column. Method: Industrial-grade olivine and serpentine were tested. Flow conditions e.g. gas flow rate, stirring, particle diameter of …

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Minerals | Free Full-Text | Separation of Products from ...

Therefore, the separation of the unreacted olivine is an important step, also with regards to circulation of this mass flow back to the carbonation reactor. The flotation scheme consisted of monomineral flotation of olivine, magnesite and microsilica to determine the floatability of the single minerals, followed by flotation of an artificial ...

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Revision 2 Carbonate mineralization in percolated olivine ...

1 1 Revision 2 2 Carbonate mineralization in percolated olivine aggregates: Linking effects of 3 crystallographic orientation and fluid flow 4 Steve Peuble 1,*, Muriel Andreani 2, Marguerite Godard 1, Philippe Gouze 1, Fabrice Barou 1, 5 Bertrand Van de Moortele 2, David Mainprice 1, Bruno Reynard 2 6 1Géosciences Montpellier, Université Montpellier 2, CNRS, Place Eugène Bataillon cc060, F-

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Olivine: A rock-forming mineral. Used as the gemstone peridot.

Olivine in basalt: Lherzolite (a variety of peridotite) nodules in a xenolith collected from a basalt flow at Peridot Mesa, Arizona. These xenoliths often contain crystals of olivine with a color and clarity that is suitable for use as a peridot gemstone. This specimen is approximately 3 inches (7.6 centimeters) across.

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Influences of CO2 on the Microstructure in Sheared Olivine ...

Based on experiments of two-phase aggregates of olivine + basalt, a two-phase flow theory and a CPO formation model were established to explain these microstructures. Here, we investigate the microstructure in a two-phase aggregate with supercritical CO 2 as the fluid phase and examine the theory and model, to evaluate differences in ...

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Olivine flotation in mantle melt - ScienceDirect

Olivine flotation in the experimental komatiite commences at a pressure close to where the liquidus phase changes from olivine to denser garnet, leading to the possibility of density driven crystal sorting during fractionation. Molten peridotite (KLB-1) shows an isothermal compression (2000) of 0.065 g cm-j GPa-1 in the interval 105 Pa to 8.2 ...

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Olivine flotation and crystallization of a global magma ...

Olivine flotation and crystallization of a global magma ocean. Phys. Earth Planet. Inter., 74: 23—28. According to the so-called olivine flotation hypothesis, basic silicate liquids become denser than coexisting ultramafic crystalline peridotites at high pressures through their higher compressibility.

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Olivine flotation in mantle melt - ScienceDirect

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effect of oxidation on flotation of chromite olivine

Flotation of Chromite Ore. Jun 05, 2017 Effect of Pulp pH on Flotation of Chromite. The effect of pH on flotation response was originally performed on Benbow-1 ore (16.3 percent Cr2O3). The ore was ground to 88 percent minus 65 mesh and deslimed at a 30-micrometer particle size.

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Static compression and olivine flotation in ultrabasic ...

Piston-cylinder techniques have been used to observe static compressions of ultrabasic silicate liquids to 6 GPa and 2000°C. Compressions are measured by bracketing sinking and floating of olivine crystals of known density at run conditions. Komatiite, peridotite, and their liquid mixtures with Fe 2 SiO 4 all show constant density changes with pressure of ≅ 0.07 g/cm³/GPa along ...

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1 Froth Flotation – Fundamental Principles

Froth flotation is a good example of an engineering "system", in that the various important parameters are highly inter-related, as shown in Figure 1. It is therefore important to take all of Chemistry Components Collectors Frothers Activators Depressants pH Equipment Components Cell Design Agitation Air Flow Cell Bank Configuration

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Hard Creek Advances Development of the Turnagain Mill Flow ...

silicates such as serpentine and olivine. Preliminary flotation kinetic tests at XPS support a primary grind size between 75 and 80 µm. Future regrind work will be targeted to liberate the fine grained pentlandite in the flotation cleaner circuit. HNC and HPS are continuing the development of the mill process flow sheet with grindability

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Effect of type of modifier and pH value on chromite flotation.

On the other hand, flotation of chromite from olivine ... Method Industrial-grade olivine and serpentine were tested. Flow conditions e.g . gas flow rate, stirring, particle diameter of silicates ...

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Influence of aluminum–sodium silicate on olivine flotation ...

Olivine samples (0.9 Mg 2 [SiO 4]⋅0.1Fe 2 [SiO 4]) for the present study were supplied from Panzhihua (Sichuan province, China) and its purity is more than 98%.After being subjected to manual selection, crushing, grinding, and screening, the powder with particle sizes of 38–75 μm was used for flotation tests and microcalorimetry analyses (Xu et al., 2017a), whereas that with particle ...

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Major Mines & Projects | Nickel West Operation ( Cliffs ...

Flotation; Nickel West is a fully integrated nickel business located in Western Australia, with three streams of concentrate. ... (olivine cumulates and thin spinifex textured flows), basalts, volcanic and volcanoclastic rocks and sedimentary rocks The ultramafic sequence at Mt Keith is lenticular It faces W, dips 80- 85, and has undergone low ...

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