New challenges for gravity concentration and classification of fine particles

Galvin, K.P.; Iveson, S.M.

doi:10.1016/j.mineng.2022.107888

Cited by 9 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the losing recovery of ZrO 2 in the tailing (Middling III) reached 39.83%, which may be accounted by the fact that considerable amounts of zircon have small size in the sample. Their own gravity of the fine particles could not overcome other forces which were offered by viscous fluid and mechanical vibration [27], resulting in the zircon entering the tailing. It was proposed that some special gravity separators such as grooving shaking table [28], rotary cone separator [29] and centrifugal machine [30] were adopted in the subsequent tests.…”

Section: Size Distributionmentioning

confidence: 99%

Gravity Separation Tests of a Complex Rutile Ore

Wang,

Zheng,

Huang

et al. 2024

Minerals

View full text Add to dashboard Cite

The complex rutile ore containing TiO2 and ZrO2 exhibited a high economical value. To effectively recover TiO2 and ZrO2 from the raw sample, a complete gravity separation process including a spiral chute and a shaking table was proposed. Chemical constituents, phase, liberation degree and size distribution were firstly characterized by XRF, chemical analyses, XRD, EPMA-EDS and screening to understand the mineralogy. Then, two stages of spiral chute separation tests were performed to treat the complex rutile ore. A rough zircon concentrate containing 33.18% ZrO2 was obtained after the first-stage spiral chute and a rough rutile concentrate containing 56.77% TiO2 was obtained after the second-stage spiral chute. To further improve the grade and recovery of ZrO2 and TiO2 in the rough products obtained by spiral chutes, shaking table tests were performed. A zircon concentrate containing 42.65% ZrO2 and a rutile concentrate containing 61.75% TiO2 were obtained. For the tailing of the first-stage spiral chute, a rutile product assaying 57.50% TiO2 was obtained, and the tailing was directly discarded as waste after the shaking table tests. Moreover, the distribution regularities of ZrO2 and TiO2 in the products were further revealed by XRD analyses. Finally, a closed-circuit beneficiation process was proposed to treat the complex rutile ore for achieving comprehensive and effective utilization.

show abstract

Section: Size Distributionmentioning

confidence: 99%

Gravity Separation Tests of a Complex Rutile Ore

Wang,

Zheng,

Huang

et al. 2024

Minerals

View full text Add to dashboard Cite

show abstract

“…Therefore, the development and adoption of advanced technologies and methods suitable for processing fine minerals are of great importance to improve ore resource utilization, reduce waste generation, and protect the environment. In the gravity concentration, water is used as the fluid medium and the density difference between particles is the main driving force for separation 3,4 …”

Section: Introductionmentioning

confidence: 99%

“…In the gravity concentration, water is used as the fluid medium and the density difference between particles is the main driving force for separation. 3,4 However, the size distribution characteristics of the feed particles could exert a notable influence on the separation performance based on the difference in particles densities, especially when a water-only separator is used. As a result, the coarse but light particles would be lost to the underflow (heavy products), and the small but dense particles would contaminate the overflow (light products).…”

Section: Introductionmentioning

confidence: 99%

The separation of fine minerals in the synergy between the vertical fluidization section and inclined channels of the reflux classifier

Zhang,

Fang,

Jing

et al. 2023

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

In the gravity separation of fine minerals, the misfit phenomenon caused by particle size cannot be completely overcome, which makes it difficult to effectively recover useful minerals of a given density. In this paper, a novel reflux classifier (RC) experimental equipment was designed in which the cross‐sectional area of the inclined channel is smaller than that of the vertical portion. As the rising water entered the inclined channel, its velocity increases, leading to a higher shear rate. A series of particle fractionation experiments were conducted in this paper to examine the effect of synergy between the inclined and vertical sections of the RC on weakening the segregation arising from the particle size range. Sand, glass bead, and magnetite particles were used in separate investigations. An empirical equation for predicting the rising water fluidization flow rates that put the particles in a critical state was developed to describe the broad range of experimental data. The results show that the novel RC system creates a more suitable fluid environment through the synergy of vertical and inclined sections, allowing for the complete separation of sand and magnetite mixtures, as well as the separation of particles with different particle sizes but the same terminal settling velocity at the same flow rate. This indicates a reduced dependence on particle size for separation. The theoretical model can accurately predict the fluidization rate and the particle size composition of the separated product.

show abstract

Application of inclined channels in the hydrodynamic classification of minerals by particle size

Starrett

Galvin

2023

Minerals Engineering

View full text Add to dashboard Cite

New challenges for gravity concentration and classification of fine particles

Cited by 9 publications

References 22 publications

Gravity Separation Tests of a Complex Rutile Ore

Gravity Separation Tests of a Complex Rutile Ore

The separation of fine minerals in the synergy between the vertical fluidization section and inclined channels of the reflux classifier

Application of inclined channels in the hydrodynamic classification of minerals by particle size

Contact Info

Product

Resources

About