olivine flotation flow
olivine flotation flow
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olivine flotation flow

Selective flotation of ilmenite from olivine using the ...

Dec 10, 2016  The micro-flotation results indicate that the AWG at a molar ratio 1:3 of oxalic acid to water glass (WG) exhibits the maximum selective depression on olivine. The selective flotation of ilmenite from olivine can be better achieved using an AWG as depressant rather than WG in the artificially mixed minerals flotation experiments.

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Olivine flotation and crystallization of a global magma ...

Nov 01, 1992  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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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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Flotation of Chromite as Pre-Treatment of Olivine Before ...

Flotation using G30 Milled olivine and serpentine allows enrichment ratio of 1.25 to 1.5 only in the first half of the flotation test. Chromite separation from GL10 olivine, which is the finest mineral was observed to be of nil efficiency.

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Olivine flotation in mantle melt - ScienceDirect

Jan 01, 1993  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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Influence of aluminum–sodium silicate on olivine flotation ...

Nov 01, 2019  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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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 experiments on the join Mg2SiO4-Fe2SiO4 Results are presented of a study of some unusual density relations between olivine and coexisting liquid in the system fosterite-fayalite. At 1 atmosphere pressure it is found that olivine floats on its coexisting liquid for intermediate compositions on this binary because of extreme partitioning of Fe into the melt phase.

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Olivine flotation in mantle melt - NASA/ADS

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°C) of 0.065 g cm -3 GPa -1 in the interval 10 5 Pa to ...

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

Publication Status is "Submitted" Or "In Press ...

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Dislocation mechanisms in olivine and flow in the upper ...

Jul 01, 1972  EARTH AND PLANETARY SCIENCE LETTERS 15 (1972) 239-247. NORTH-HOLLAND PUBLISHING COMPANY DISLOCATION MECHANISMS IN OLIVINE AND FLOW IN THE UPPER MANTLE H.W. GREEN II Department of Geology, University of California, Davis. and S.V. RADCLIFFE Division of Metallurgy and Materials Science, Case Western Reserve University, Cleveland, Ohio.

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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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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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Flotation mechanism of sulphide melt on vapour bubbles in ...

Jul 15, 2020  Flotation mechanism of sulphide melt on vapour bubbles in partially molten magmatic systems ... which matches that of capped sulphide globules settled into the olivine cumulates of Noril'sk ... buoyancy and capillary forces. Due to the relative importance of those forces, the style of multiphase porous media flow has been categorized into three ...

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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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Influence of surface dissolution on sodium oleate ...

Jan 15, 2020  For raw titanaugite, with the increase in pH the recovery increased from 2.01% to 42.63%, then declined steadily. Interestingly, the flotation recoveries of ultrasonic-treated titanaugite were below 10% in the investigated pH range. The recovery of raw olivine increased rapidly from 20.65% at pH = 2.1 to 90.1% at pH = 11.0.

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Copper Nickel Flotation

Jun 15, 2017  The Bureau of Mines investigated the flotation responses of two copper nickel ore samples from the Duluth Complex with the objective of recovering bulk sulfide concentrates. One of the ores studied was taken from a test pit; the other was taken from a test shaft. The samples were quite similar except that the pit sample analyzed 0.35 pct Cu and 0.11 pct Ni and the shaft sample analyzed

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Laura TURRI Engineer PhD RD

Flotation of Chromite as Pre-Treatment of Olivine Before Carbonation for CO Sequestration. ... Method Industrial-grade olivine and serpentine were tested. Flow conditions e.g . gas flow rate ...

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A long-lived magma ocean on a young Moon Science Advances

A giant impact onto Earth led to the formation of the Moon, resulted in a lunar magma ocean (LMO), and initiated the last event of core segregation on Earth. However, the timing and temporal link of these events remain uncertain. Here, we demonstrate that the low thermal conductivity of the lunar crust combined with heat extraction by partial melting of deep cumulates undergoing convection ...

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Natural examples of olivine lattice preferred orientation ...

Tectonic plate motion is thought to cause solid-state plastic flow within the underlying upper mantle and accordingly lead to the development of a lattice preferred orientation of the constituent olivine crystals. The mechanical anisotropy that results from such preferred orientation typically produ

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Formation of Bushveld anorthosite by reactive porous flow ...

Dec 23, 2020  a Percolative reactive flow of acidic fluid through noritic cumulate. b The fluids have dissolved the orthopyroxenes and locally caused crystallisation of olivine enclosing partially resorbed, high-An plagioclase. The olivine is rimmed by peritectic reaction orthopyroxene and surrounded by a corona of high-An plagioclase.

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Olivine flotation and crystallization of a global magma ...

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. Therefore, the olivine, crystallizing from a global magma ocean, settles to a neutrally buoyant zone at about 250 km depth dividing the molten outer part of the Earth into two oceans separated by ...

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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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Serpentinization of Olivine by Seawater: A Flow-Through ...

The mantle exposed at slow spreading ridges is pervasively serpentinized, down to ca. 5km according to geophysical data. The onset and durability of this hydration process require efficient penetration and renewal of fluids at the mineral-fluid interface. However, the mechanisms of fluid penetration are still poorly understood. Moreover, serpentinization is exovolumic, if a mass-conservative ...

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(PDF) CO2 sequestration by carbonation of olivine: a new ...

Method Industrial-grade olivine and serpentine were tested. Flow conditions e.g . gas flow rate, stirring, particle diameter of silicates, and physicochemical considerations (composition if the ...

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

Dec 28, 2015  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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Laura TURRI Engineer PhD RD

Flotation of Chromite as Pre-Treatment of Olivine Before Carbonation for CO Sequestration. ... Method Industrial-grade olivine and serpentine were tested. Flow conditions e.g . gas flow rate ...

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A Review of Flotation Physical Froth Flow Modifiers

Over the past few decades, the need to process more minerals while lowering capital costs has led to an increase in the size of flotation cells, e.g., 0.03 m3 to 1000 m3. However, this increase has created new challenges in the operation and design of industrial flotation cells, particularly in terms of froth removal, because the distance the froth must travel increases with an increase in the ...

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FLOTATION CONTROL OPTIMISATION - Mintek

The mechanics of flotation shows that there is a direct impact on recovery as the residence time changes. It is possible with the FloatStar Flow Optimiser to control the inferred flow, and hence the residence time of a bank, to setpoint. The residence time (and re-circulating load in

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Copper Flotation - Mineral Processing Metallurgy

May 16, 2016  Ten or more “Free-Flow” Flotation Cells are used per bank and these cells are divided into groups of four or six cells with an intermediate step-down weir between groups. “Free-Flow” Flotation Cells are specified, as metallurgy is extremely good while both maintenance and operating expenses are traditionally low.

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Acidic medium flotation separation of chromite from ...

Nov 01, 1997  It was demonstrated that, when Na-oleate is used as collector, chromite, olivine and serpentine can be separated at pH 2.5 and/or pH 5.5 when employing ethylene-diamine tetraacetate (EDTA) on previously deslimed material. This approach ensures flotation concentrates with a Cr 2 O 3 content better than 50% with a recovery of more than 75%.

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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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Physical properties of magmas

where E* is the activation energy for viscous flow, R is the gas constant, and T is the temperature in ºK. A plot of ln ηvs. 1/T is a straight line. Some typical values of viscosity of magmas are shown in the next slide. Viscosity has a control on magma flow rates, volcano morphology, rates of gas escape, rates of

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VISCOUS FLOW OF ILMENITE-BEARING CUMULATES DURING

a magma ocean [17]). Taking the dislocation creep flow laws at face value, the viscosity contrast between the IBC and early LMO cumulates is largely determined by the LMO water content (Figs. 1a,b) The viscosity contrast is >4 orders of magnitude for a dry Moon; for a Moon with 10ppm H 2 O olivine it is >2 orders of magnitude. We

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