DOI: 10.1016/j.mineng.2022.107804 Corpus ID: 251698801; Agitation effect on particle dispersion and separation in an agitated reflux classifier @article{Chu2022AgitationEO, title={Agitation effect on particle dispersion and separation in an agitated reflux classifier}, author={Haoran Chu and Zhen-qiang Liu and Yu-hua Wang and Dongfang Lu and Xiayu …
Furthermore, the Reflux™ Classifier achieved an iron ore grade of 60% and the reverse flotation one of 47%. The Reflux™ Classifier in other words clearly performed better in this test.
Classification will be challenged by the emerging requirements for gravity concentration, comminution, and coarse/fine particle flotation circuits to ensure beneficiation can straddle two decades ...
This study addresses the response of high alumina iron ore slimes using combination of classification using hydrocyclone and flotation with amines and fatty acid, aiming at the production of ultrafine concentrate adequate for blending with traditional pellet feed fines. 1.2.1. Starch–kaolinite interactions.
RFC is in fact an inverted gravity separation system known as the Reflux™ Classifier (RC), which combines a conventional fluidized bed separator with a set of parallel inclined plates that form lamella channels. ... addressed favorable results for reverse iron ore flotation using a Pneuflot® pneumatic cell (MBE ), while the …
Previous studies have shown that the inclusion of ultrafine particles in the feed to reverse iron ore flotation results in poor ... and a final concentration stage using the Reflux Classifier was ...
The iron ore feed had a head grade of 35 wt-% Fe T. At a low feed solids mass flux of 1.5 t m −2 h −1, the REFLUX™ Classifier produced high-grade products at …
The REFLUX™ Classifier is a recently developed water-based gravity separation technology that is already being used worldwide to beneficiate particles above 0.100 mm in size. This paper reports ...
The VPHGMS appears to be more effective than the Reflux Classifier in rejecting coarse quartz particles, which is essential for achieving a low tailings grade, …
Amariei et al. (2014) used a Reflux Classifier to beneficiate an iron ore feed finer than 0.15 mm with an Fe grade of only 30%, achieving an Fe recovery of ∼ 81% and Fe grade of 68.4%. With a ...
@article{Rodrigues2024GravitySO, title={Gravity separation of fine itabirite iron ore using the Reflux Classifier – Part II – Establishing the underpinning partition surface}, author={Armando Fernandes da Veiga Rodrigues and Homero Delboni Junior and James Zhou and Kevin P. Galvin}, journal={Minerals Engineering}, year={2024}, url={https ...
Gravity separation of fine itabirite iron ore using the Reflux Classifier – Part I – Investigation of continuous steady state separations across a wide range of parameters ... a typical industrial itabirite concentration circuit includes desliming in hydrocyclones and concentration via reverse flotation, product thickening and filtration ...
A re-design of the technology was undertaken with Ludowici, and the Reflux Classifier was re-launched to the global market in 2009. Delivering commercial impact. The Reflux Classifier helps companies enhance their extraction efforts, allowing organisations to recover high-value product that would otherwise have been discarded as tailings waste.
and iron recovery of 72.9+/ 0.4 % at 9 t/m2/h. A second feed with 1 % goethite and 57 % hematite was upgraded from 41 % to 66.3+/ 0.4 % iron at an iron recovery of 84.7+/ 0.5 % at 10 t/m2/h. (The grade of pure hematite is 69.9 % iron). It was essential to run the Reflux Classifier at a sufficient volumetric rate to
Flotation, for example, has seen the emergence of new technologies that extend the coverage to both ultrafine particles, nominally finer than 0.020 mm, and to relatively coarse particles larger than 0.15 mm (Jameson, 2010, Jameson et al., 2020, Wang and Liu, 2021). ... Gravity separation of fine itabirite iron ore using the Reflux …
The Reflux Classifier is a new water-based gravity separation technology that consists of a set of parallel inclined channels positioned above a vertical fluidised section. This …
The REFLUX™ Classifier is a recently developed water-based gravity separation technology that is already being used worldwide to beneficiate particles above 0.100 mm in size. This paper reports tests performed on an ultra-fine iron ore with nominal top size of 0.106 mm, but with 59 wt-% being below 0.038 mm in size.
The REFLUX™ Classifier is a recently developed water-based gravity separation technology that is already being used worldwide to beneficiate particles …
The REFLUX™ Concentrating Classifier (RCC™) builds upon the success of our original REFLUX™ Classifier (RC), by optimising bed formation and split fluidisation utilising gravity-based separation techniques to tackle the recovery challenges associated with low-grade minerals. The RCC features several design improvements over the RC …
A laboratory-scale REFLUX™ Concentrating Classifier was operated in continuous mode to beneficiate a sub 0.100 mm tantalum ore with a head grade of 0.56 wt.% Ta. The unit incorporated a lower section …
A satisfactory 10 um classification efficiency of 67.89% could be obtained when the ore pulp concentration was 15%, the agitation speed was 350 r/min, and the underflow flux was 16 cm3/min.
Experiments were conducted using the Reflux Classifier to upgrade itabirite iron ore. The underpinning partition surface of the Reflux Classifier was established. …
The recovery and concentration of ultra-fine iron ore can provide significant economic benefits. Presently, there are limited options available given the low settling rates achieved by conventional gravity separation and the relatively poor performance of reverse flotation. The Reflux Classifier is a new water-based gravity separation technology that consists …
@article{Rodrigues2023GravitySO, title={Gravity separation of fine itabirite iron ore using the Reflux Classifier – Part I – Investigation of continuous steady state separations across a wide range of parameters}, author={Armando Fernandes da Veiga Rodrigues and Homero Delboni Junior and Ot{'a}via Martins Silva Rodrigues and …
Column flotation tests were performed with iron ore slimes. The column having 5.1 cm in diameter and a total height of 6.0 m was used. The %s in the conditioning phase and in the column feeding were kept at 35% and 25%, respectively. The pH adjustment was made with sodium hydroxide.
The flotation has been successfully applied to process the iron ore for the particle size (Ps) from 10 µm up to 150 µm. The presence of the slimes (Ps < 10 µm) is harmful on the reverse ...
This work describes the concentration of iron ore slimes on a pilot scale by using a 500-mm diameter flotation column and a novel collector, which renders the use of a depressant unnecessary.
The iron ore product from the reverse flotation, released via the underflow of the cells, is then sent to the product thickener to achieve a sufficient pulp density ahead of the final dewatering. ... Gravity separation of fine itabirite iron ore using the reflux classifier – part I - investigation of continuous steady state separations across ...
The REFLUX™ Classifier is a recently developed water-based gravity separation technology that is already being used worldwide to beneficiate particles above 0.100 mm in size. This paper reports tests performed on an ultra-fine iron ore with nominal top size of 0.106 mm, but with 59 wt-% being below 0.038 mm in size.
The FLS REFLUX Classifier is one of our most advanced fine particle, gravity-based separators, ofering significant advantages in capacity, adaptability and eficiency. Key …
The REFLUX™ Classifier is a relatively recent density-based separation technology that consists of a set of parallel inclined channels mounted above a fluidised bed (Galvin, 2012). ... Flotation cells have a wide range of applications in the field of particle separation as a traditional flotation unit. Due to the declining ore grades and the ...
This study provides a comprehensive investigation of the gravity separation of the fine iron ore feed achieved by the Reflux Classifier, covering the effects of changes …
The recovery of iron from the screw classifier overflow slimes by direct flotation was studied. The relative effectiveness of sodium silicates with different silica-to-soda mole ratios as depressants for silica and silicate bearing minerals was investigated. Silica-to-soda mole ratio and silicate dosage were found to have significant effect on the …
The REFLUX classifier incorporates the new 'laminar high shear rate' mechanism: the latest in fine particle gravity based separation technology. This, along with advancements in channel spacing and width mean that REFLUX classifiers are more …
This partnership has already seen the successful development and commercialisation of the REFLUX Classifier (RC™) with a similar commercialisation path being envisioned for the new REFLUX Flotation Cell. ... but not limited to, coal, gold tailings, graphite, iron ore, copper roughing, moly cleaning – where in every case the …
In principle, the Reflux Classifier offers the potential to achieve the required product grade in a single stage separation (Amariei, 2014), without the need for the desliming stage, …
