Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)
Characterization of Leaching Feed and Residue of Mechanically Activated Sphalerite

R. Aram; M. Abdollahi; P. Pourghahramani; M. Mohseni; A. Khodadadi Darban

Volume 12, Issue 4 , October 2021, , Pages 1029-1040


  In this research work, the solubility of sphalerite concentrate due to mechanical activation in planetary ball mill in both the wet and dry modes is investigated, and the parameters of mean particle size, BET specific surface area, SEM, and XRD are analyzed. The results of the particle size analysis ...  Read More

A Proposed Biochemical Protocol to Isolate and Characterize Acidophilic Bacteria from Tailings Soil

Z. Piervandi; A. Khodadadi Darban; Seyed M. Mousavi; M. Abdollahi; Gh.R. Asadollahfardi; K. Akbari Noghabi

Volume 11, Issue 4 , October 2020, , Pages 1157-1171


  Indigenous acidophilic bacteria separated from mine-waste can be used in return for the addition of the reagents like sulfuric acid. Among the tailings bacteria, Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans are of the most-studied ones for the bioleaching and bioremediation of elements. ...  Read More

Comparison of Copper Dissolution in Chalcopyrite Concentrate Bioleaching with Acidianus Brierleyi in Different Initial pH Values

M. R. Samadzadeh Yazdi; M. Abdollahi; S. M. Mousavi; A. Khodadadi Darban

Volume 11, Issue 3 , July 2020, , Pages 753-764


  Although bioleaching of chalcopyrite by thermophilic microorganisms enhances the rate of copper recovery, a high temperature accelerates iron precipitation as jarosite, which can bring many operational problems in the industrial processes. In this research work, the bioleaching of chalcopyrite concentrate ...  Read More

Investigation of Mechanism of Adsorption of Xanthate and Hydroxamate on Malachite

M. Mohammadkhani; M. Abdollahy; M. R. Khalesi

Volume 11, Issue 3 , July 2020, , Pages 921-933


  Copper oxide minerals such as malachite do not respond well to the traditional copper sulfide collectors, and require alternative flotation schemes. In many copper ore mines, significant copper oxide minerals, especially malachite, are associated with sulfide minerals. Considering that xanthates are ...  Read More

Mineral Processing
Mechanical activation of phosphate concentrates to enhance dissolution efficiency of rare earth elements from a kinetic viewpoint

H. Shadi Naghadeh; M. Abdollahy; A. Khodadadi Darban; P. Pourghahramani

Volume 10, Issue 2 , April 2019, , Pages 373-388


  The Esfordi phosphate concentrate mainly contains fluorapatite, monazite, and xenotime as rare earth element (REE) minerals, accounting for 1.5% of rare earth metals. The monazite and xenotime minerals are refractory and their decomposition is only possible at high temperatures. Thus mechanical activation ...  Read More

Mineral Processing
Leaching of gold ores with high cyanicides: a physico-chemical modeling approach

Y. Kianinia; M. R. Khalesi; M. Abdollahy; A. Khodadadi Darban

Volume 10, Issue 1 , January 2019, , Pages 87-94


  Processing of gold ores with high sulfide minerals is problematic as they consume cyanide and reduce gold leaching. Optimization of gold leaching and cyanide consumption requires a methodology to estimate the amount of exposed cyanicides, their leaching kinetics, and speciation of cyanide complexes that ...  Read More

Mineral Processing
Effect of impeller speed on properties of quiescent zone and entrainment in mechanical flotation cells

S. Razmjooei; M. Abdollahy; M. R. Khalesi

Volume 9, Issue 4 , October 2018, , Pages 807-816


  Flotation process in mechanical cells is carried out in highly turbulent conditions. In this work, the impact of impeller speed on four characteristics of the quiescent zone, i.e. zone height, turbulence, solid percentage, and gas holdup, and their relationship with the entrainment is investigated, and ...  Read More

Investigation of effect of sulfate ion on xanthate consumption in galena flotation based on thermodynamic diagrams

M.R. Shahverdi; A. Khodadadi Darban; M. Abdollahy; Yadollah Yamini

Volume 9, Issue 4 , October 2018, , Pages 1035-1048


  Flotation is a common process in sulfide ore beneficiation. Due to the restrictions and lack of access to high-quality water sources for industrial purposes, recycled water plays an important role in the flotation processes. Due to the existence of various organic and inorganic substances in the process, ...  Read More

Mineral Processing
An insight into effect of surface functional groups on reactivity of Sphalerite (110) surface with Xanthate collector: a DFT study

M. Mohseni; M. Abdollahy; R. Poursalehi; M. R. Khalesi

Volume 9, Issue 2 , April 2018, , Pages 431-439


  The reactivity of the protonated and hydroxylated sphalerite (1 1 0) surface with xanthate was simulated using the density functional theory (DFT). The difference between the energy of the lowest unoccupied molecular orbital of the sphalerite surface and the energy of the highest occupied molecular orbital ...  Read More

Mineral Processing
Interactional effects of bubble size, particle size, and collector dosage on bubble loading in column flotation

A. Eskanlou; M. R. Khalesi; M. Abdollahy; M. Hemmati Chegeni

Volume 9, Issue 1 , January 2018, , Pages 107-116


  The success of flotation operation depends upon the thriving interactions of chemical and physical variables. In this work, the effects of particle size, bubble size, and collector dosage on the bubble loading in a continuous flotation column were investigated. In other words, this work was mainly concerned ...  Read More

Mineral Processing
Prediction of effect of fine particle removal on efficiency of a spiral circuit by size-by-size partition curves

F. Basirifar; M.R. Khalesi; M. Ramezanizadeh; M. Abdollahy; A. Hajizadeh

Volume 8, Issue 4 , October 2017, , Pages 567-571


  Partition curves are widely used to determine the spiral separator efficiency. In this work, the partition curves were used in order to investigate the particle transportation to concentrate and tailing streams. Simulation of fine particle removal using the size-by-size partition curves showed that the ...  Read More

An applied comparison between conventional pre-dispersed solvent extraction (PDSE) contactors and new dissolved nitrogen PDSE (DNPDSE) ones

M. R. Tavakoli Mohammadi; Seyed M. J. Koleini; M. Abdollahy

Volume 6, Issue 2 , July 2015, , Pages 159-168


  Efforts to increase the mass transfer coefficient, enhance the contact area, and decrease the power input of contractors have given risen to the development of the pre-dispersed solvent extraction (PDSE) contactor and the devise of the new dissolved nitrogen PDSE (DNPDSE) contactors. The studies conducted ...  Read More

Kinetics of chemical leaching of chalcocite from low-grade copper ore: size-distribution behavior

Hojat Naderi; Mahmoud Abdollahy; Navid Mostoufi

Volume 6, Issue 1 , January 2015, , Pages 109-118


  Kinetics of the chemical leaching of chalcocite from a low-grade copper ore in a ferric sulfate medium was investigated using the constrained least square optimization technique. The experiments were carried out for different particle sizes in both the reactor and column at constant Eh, pH, and temperature. ...  Read More

Prediction of recovery of gold thiosulfate on activated carbon using artificial neural networks

Saeed Alishahi; Ahmad Darban; Mahmood Abdollahi

Volume 5, Issue 1 , January 2014, , Pages 55-66


  Since a high toxicity of cyanide which use as a reagent in the gold processing plant, thiosulfate has been recognized as a environmental friendly reagent for leaching of gold from ore. After gold leaching process it's important for recovery of gold from solution using adsorption or extraction methods, ...  Read More

Collectorless flotation of Chalcocite by controlling redox potential

sima razmjouee; mahmood abdollahy; seyed mohammad javad koleini

Volume 3, Issue 2 , July 2012, , Pages 99-102


  Using microflotation method, this study explored the collectorless flotation of Chalcocite and its dependence on the redox potential of pulp . Electrochemical studies were performed by cyclic voltammetry  in specific potential ranges and at different pH values. The results show that significant ...  Read More