· 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. ... Bulk moduli of ultrabasic melts The primary target of this study has been to test the olivine flotation hypothesis ...
· Chemical heterogeneities in Apollo sample 76535 constrain the magmatic cooling history of the lunar Mg-suite to <~ 20 My. Such rapid cooling is inconsistent with a large intrusive magma body and ...
· The olivine ranged in color from green to yellowish-brown. The chromite is liberated essentially in the minus 100-mesh fraction; however, a small amount of chromite remains locked in the minus 325-mesh fraction. ... consisted of stage-grinding samples of millfeed to minus 20-mesh and separating the minus 100-mesh material for flotation testing ...
Section snippets Materials and reagents. 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 …
· flotation, where air and flotation reagents are added to the slurry to assist separation of the mineral (Wills, 2007). While conventional centrifugal slurry pumps will pump light frothy slurries, operational problems normally occur when the air content is increased. A thorough understanding of the Foskor Phalaborwa complex flotation circuit lead to
· relying upon olivine acidic leaching followed by carbonation and separation stages. Comparison of the two processes is made in terms of reaction yields and quality of the products obtained. 2. Direct carbonation of olivine 2.1. Feedstock The olivine used is produced in Norway and can be considered as a mixed Mg-Ni and Fe silicate. The
· StackCell concentrate in a conventional flotation cell may be somewhat reduced, as compared to concentrate produced via conventional flotation. Laboratory tests were therefore completed to address this concern. The partially successful Trial 2 tests were expanded in a final round of test work in January 2016,
· Rougher flotation of ore containing abundant olivine upgraded the chromite from 23.4 to 29.6 percent Cr2O3 at a recovery of 89.4 percent. ... The gravity concentrate for flotation testing was prepared from Benbow-2 ore using …
Olivine particles (120 μm) can be converted at 81% with a low excess of acid within 3 h at 95°C. The silica quantitatively recovered exhibits a BET area over 400 m ² g ⁻¹, allowing valuable ...
From the mineral flotation test results, Al–Na2SiO3 was found to exhibit an improved depression capacity as compared to the samples in the absence of …
· According to the so-called olivine flotation hypothesis, basic silicate liquids become denser than coexisting ultramafic crystalline peridotites at hi…
On the other hand, flotation of chromite from olivine ... Micro-flotation test results showed that GM depressed serpentine more stronger than that of the chalcopyrite at a wide pH range of 3–8 ...
· The results of the flotation test work can in the future be utilized to calculate a weighting function named "LCF" as reported by Buettner et al. The "LCF" was used to highlight regions in a cassiterite tailings dam, which were considered most suitable for the recovery of cassiterite in a geometallurgical 3D-model . The acronym "LCF ...
· Magnesium hydroxide is a sustainable material for CO2 sequestration, according to an acid digestion and electrolysis method using olivine-rich silicate rocks in a …
· 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. Batch flotation test results indicate that, compared with the depressant WG, the depressant AWG not only increases the recovery and grade of the Ti concentrates by 7.74% and ...
We present major and trace element data for olivines and rapidly quenched groundmass material separated. from eight samples of basaltic rock. From these data …
Part 1: The effect of composition on the elastic properties of silicate liquids - Herzberg, C.T. Magma density at high pressure. Part 2: A test of the olivine flotation hypothesis - Herzberg, C.T. Pressure dependence of the viscosity of silicate melts - Scarfe, C.M. et al. Physics of magma segregation processes - Turcotte, D.L.
On the other hand, flotation of chromite from olivine ... Micro-flotation test results showed that GM depressed serpentine more stronger than that of the chalcopyrite at a wide pH range of 3–8 ...
· 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), …
· The physico-chemical interactions among minerals such as olivine, chromite and serpentine; the most commonly present ions in solution such as Ca and Mg; and flotation reagents such as EDTA and oleic acid were investigated. The study was conducted via release tests, electro-phoretic measurements and microflotation of selected minerals coming from the …
· CLAUDE T. HERZBERG: Magma density at high pressure Part 2: A test of the olivine flotation hypothesis 47 CHRISTOPHER M. SCARFE, BJÖRN O. MYSEN and DAVID VIRGO: Pressure dependence of the viscosity of Silicate melts 59 DONALD L. TURCOTTE: Physics of magma segregation processes 69 Part B. Upper Mantle Partial Melting and Fractionation
We also conducted a buoyancy test for the pyrollite melt. Olivine with the Fo95 composition sinks in the melt at 8GPa. This result together with that of the FeO rich peridotite melt implies that the density crossover will exist at the pressure around 12GPa in the magma with the terrestrial mantle composition.
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. Flotation Behavior Of Sudanese Chromite Ores. The best flotation concentrate contained 36per centCrZO3bymass. Considerable beneficiation workwasconducted onthe chromites from Montana over several decades.
We also conducted a buoyancy test for the pyrollite melt. Olivine with the Fo 95 composition sinks in the melt at 8 GPa. This result together with that of the FeO rich peridotite melt implies that the density crossover will exist at the pressure around 12 GPa in the magma with the terrestrial mantle composition.
The selective flotation of ilmenite from olivine can be better achieved using an AWG as depressant rather than WG in the artificially mixed minerals …
· Figure 12 Laboratory mechanical flotation cell (extracted from Wills & Napier-Munn, 2006)..... 15 Figure 13 Denver Lab Cell D-1 flotation machine (extracted from McGill University, 2020). ..... 16 Figure 14 Trend in the flotation tank size over the last century (y-axis is on a logarithmic scale)
· eted settling and flotation experiments place im-portant constraints on the contradictory elastic models. Densities calculated with the law ofcor-responding states observed are in excellent agree-mentwiththeexperimental datawhichdemonstrate forsterite settling at 6.5 GPa and flotation at 8,5 GPa; neutral buoyancy is calculated at 7.5 GPa.
· Table 3. Flotation test results carried out with alkyl phosphate Products Yield [%] Content Cr2O3 [ %] RecoveryCr2O3 [ %] Concentrate 3.7 35.89 6.4 Middlings 63.1 22.97 69.6 Tailings 33.2 15.09 24.0 Total 100.0 20.83 100.0 Table 4. Flotation test results carried out with mixture of modified fatty acid and alkyl phosphates Products Yield ...