Simulation-aided studies of heavy-media separation in Angouran lead and zinc ore

Karami, Elahe; Harzanagh, Ahad Aghlmandi; Moradkhani, Davood; Mozaffari, Ezatollah

doi:10.1080/01496395.2019.1575416

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Since 1945, Dutch State Mines (DSM) has successfully developed the first DMC for separating fine coal, and the United States, Japan, Germany, Britain, France, the former Soviet Union, and other countries have developed DMC and applied it to industry. Nowadays, DMC has been proved to be an effective method that has been favourably applied in a variety of mineral plants for processing coal, iron ore, phosphate rock, lead-zinc ore, diamond, chromite, oil shale, and plastics, and so on (Aghlmandi Harzanagh et al, 2017;Chen et al, 2012;Dou et al, 2015;Ebtedaei and Farzanegan, 2020;Gent et al, 2018;Jian et al, 2019;Karami et al, 2019;Napier-Munn, 2017;Qi et al, 2015;Richard et al, 2011;Wang, 2009;Wei et al, 2011). However, to our knowledge, there is a little report of the application of DMCs in betafite beneficiation.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of a low-grade betafite ore by dense medium cyclone

Lv¹,

Wei²,

Zhao³

et al. 2021

Physicochem. Probl. Miner. Process.

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In order to find an economical and feasible short process for betafite preconcentrating and to provide a reference for the development of similar low-grade uranium deposits, preconcentration of the betafite ore was investigated based on mineralogical characterization study, float-sink tests, and dense medium cyclone (DMC) separation experiments. The float-sink test results revealed that the gravity separation of the betafite ore was feasible, and the expected particle size range was chosen to be 3~0.3 mm. The effect of important parameters of the DMC experiment such as particle size, grade of the feed, separation density, and inlet pressure on the separation performance of betafite ore was studied. Under the optimal experimental conditions, the expanded experiments were performed and the heavy minerals contained 4557 ppm U and 5200 ppm Nb2O5 with a recovery of 88.86% and 79.73%, respectively, were obtained. Besides, the enrichment ratio (E) values of U and Nb2O5 were 14.24 and 12.78 severally, and the tailings discarding ratio (R) value was 93.76%. The results demonstrate that the preconcentration of low-grade betafite by DMC can remove a large number of tailings and obtain a high-grade uranium concentrate.

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Section: Introductionmentioning

confidence: 99%

Preconcentration of a low-grade betafite ore by dense medium cyclone

Lv¹,

Wei²,

Zhao³

et al. 2021

Physicochem. Probl. Miner. Process.

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“…Particles with a specific gravity less than the dense-medium density will float, while particles with a specific gravity greater than the dense-medium density will sink during the separation process. This method presents a wide range of applications in mineral sorting. , Considering the particle size of the CHSC adsorbent used in this study, centrifugal sedimentation was employed, and the schematic of the process is shown in Figure . Settling of ultrafine particles is difficult in conventional gravitational fields.…”

Section: Resultsmentioning

confidence: 99%

“…This method presents a wide range of applications in mineral sorting. 41,42 Considering the particle size of the CHSC adsorbent used in this study, centrifugal sedimentation was employed, and the schematic of the process is shown in Figure 8. Settling of ultrafine particles is difficult in conventional gravitational fields.…”

Section: Effects Of the Reduction Potential On The Adsorption Of Au(s...mentioning

confidence: 99%

Calcined High-Sulfur Coal for Highly Efficient Adsorption of Au(S₂O₃)₂^3– from a Gold Thiosulfate Leaching Solution Using an External Reduction Potential

Nie

Chen

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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High-sulfur coal cannot be directly burned and used; moreover, its long-term stacking can easily pollute the surrounding soil and water. Previous studies have determined that high-sulfur coal calcined under an inert gas atmosphere is reducible and can be used to recover Au(S 2 O 3 ) 2 3− from thiosulfate solutions. However, calcined high-sulfur coal (CHSC) cannot effectively adsorb Au(S 2 O 3 ) 2 3− from gold thiosulfate leaching solutions containing copper and ammonia owing to the presence of oxidant Cu(NH 3 ) 4 2+ . In this study, we demonstrated that the adsorption capacity of CHSC can be increased from 5 to 92% after the conversion of Cu(NH 3 ) 4 2+ into Cu(S 2 O 3 ) 3 5− using an external reduction potential. After adsorption was completed, the Cu-(S 2 O 3 ) 3 5− in the solution was spontaneously converted into Cu(NH 3 ) 42+ under an air atmosphere to recycle the leachate. The reduction method using an external potential prevented the irreversible transformation of Cu(NH 3 ) 4 2+ caused by the addition of reducing agents. In addition, Au-loaded CHSC was subjected to a dense-medium separation method via centrifugal sedimentation to separate Au from other substances in CHSC. Au and carbon were enriched in the light products, facilitating the subsequent recovery of Au via roasting. It was determined that the optimal experimental conditions for the recovery of 96% of Au from Au-loaded CHSC were as follows: a density of the heavy medium of 2.3 g/cm 3 , rotation speed of 2000 rpm, and centrifugation time of 8 min. This work proposes a new method for recovering Au(S 2 O 3 ) 2 3− from thiosulfate leaching solution based on sorbents prepared from solid waste high-sulfur coal.

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Investigation of velocity and magnetic field effects in an improved electrostatic cyclone precipitator for removal of submicron particles

Wang,

Zhang

2025

Fuel

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Simulation-aided studies of heavy-media separation in Angouran lead and zinc ore

Cited by 5 publications

References 11 publications

Preconcentration of a low-grade betafite ore by dense medium cyclone

Preconcentration of a low-grade betafite ore by dense medium cyclone

Calcined High-Sulfur Coal for Highly Efficient Adsorption of Au(S₂O₃)₂^3– from a Gold Thiosulfate Leaching Solution Using an External Reduction Potential

Investigation of velocity and magnetic field effects in an improved electrostatic cyclone precipitator for removal of submicron particles

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Simulation-aided studies of heavy-media separation in Angouran lead and zinc ore

Cited by 5 publications

References 11 publications

Preconcentration of a low-grade betafite ore by dense medium cyclone

Preconcentration of a low-grade betafite ore by dense medium cyclone

Calcined High-Sulfur Coal for Highly Efficient Adsorption of Au(S2O3)23– from a Gold Thiosulfate Leaching Solution Using an External Reduction Potential

Investigation of velocity and magnetic field effects in an improved electrostatic cyclone precipitator for removal of submicron particles

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Product

Resources

About

Calcined High-Sulfur Coal for Highly Efficient Adsorption of Au(S₂O₃)₂^3– from a Gold Thiosulfate Leaching Solution Using an External Reduction Potential