-
A study on the correlation between fractal dimension and particle breakage for tungsten ores under impact crushing Miner. Eng. (IF 4.9) Pub Date : 2024-09-18 Junquan Lai, Caibin Wu, Ningning Liao, Huiming Shen, Jiuxiang Zhong, Riqian Liu, Liangwei Li
Understanding the mechanical properties of ores is critical for optimizing the crushing and grinding processes. To investigate the breakage characteristics of tungsten ores with different particle sizes in different crushing sections during the comminution process, the breakage index (t10) and fractal dimension (D) of different particle sizes in different crushing sections were calculated using particle
-
Systematic investigation on bastnaesite flotation in the presence of dissolved calcium ions using organic acids as chelating agents Miner. Eng. (IF 4.9) Pub Date : 2024-09-17 Emmy Muhoza, Wencai Zhang, Seyed Hassan Amini
This study systematically investigated the potential of organic acids as Ca2+ ions chelating agents in bastnaesite flotation. Naturally, bastnaesite is associated with calcium-bearing gangue minerals, such as calcite (CaCO3) and fluorite (CaF2). The flotation beneficiation of bastnaesite in the presence of calcium-bearing minerals (e.g., calcite) is exceptionally complex due to the release of Ca2+
-
Identification and quantification of pyrrhotite superstructures in base metal sulfide ore samples: A critical review Miner. Eng. (IF 4.9) Pub Date : 2024-09-17 Alireza Rezvani, Foad Raji, Qi Liu, Yongjun Peng
Pyrrhotite, a ubiquitous gangue sulfide mineral in base metal sulfide ore deposits, has little to no economic value but can dilute base metal sulfide concentrates, reducing their quality and emitting SO₂ during downstream smelting. Therefore, effective rejection of pyrrhotite is crucial in the flotation of base metal sulfide ores. Pyrrhotite is characterized by various crystallographic superstructures
-
Remediation and improvement of abandoned iron mine soil bio-physicochemical properties by amendments and bioenergy plant Ricinus communis L Miner. Eng. (IF 4.9) Pub Date : 2024-09-16 Lala Saha, Kuldeep Bauddh
Abandoned iron mine soil (MS) contains elevated concentrations of heavy metals (HMs) with poor bio-physicochemical characteristics, causing significant risk to the environment including associated living organisms if not handled properly. Studies related to iron ore MS remediation and reclamation with commercially important bioenergy plants and economically viable amendments are still scarce and elusive
-
Amine-coated nanobubbles-assisted flotation of fine and coarse quartz Miner. Eng. (IF 4.9) Pub Date : 2024-09-14 J. Rubio, A. Azevedo, R.T. Rodrigues, G. Rojas Olivares
This study investigates the role of alkyl ether monoamine-coated nanobubbles (NBs) in assisting the flotation process of quartz across various particle sizes, on a bench scale. Experiments were conducted in a mini lab column utilizing a consortium of bubble sizes: D32 = 1200 μm for macrobubbles and D32 = 180–220 nm for amine-coated NBs. The study revealed that an increase in amine-coated NBs correlates
-
Study on the influence of the discharge end cover structure of SAG mill on the discharge capacity Miner. Eng. (IF 4.9) Pub Date : 2024-09-14 Guangtian Tian, Binghui Qiu, Wanrong Wu
The SAG mill’s discharge end cover, which comprises the slurry lifters, the grate liners, and other structures, significantly impacts the machine’s discharge capacity. The working performance of the current SAG mill when the radial structure and arc structure were adopted in the lifting bars of the grate liners and slurry lifters, respectively, was compared to investigate the influence of the discharge
-
Comparison of germanium recovery from copper(II) sulfate-based solution using tertiary amine and oxime extractant Miner. Eng. (IF 4.9) Pub Date : 2024-09-12 Michał Drzazga, Mateusz Ciszewski, Sylwia Kozłowicz, Sonia Kasierot
Germanium is considered by many world economies, including the USA and EU, as a critical raw material. One of the methods, which may be used in its recovery is solvent extraction. Using it application of more environmentally harmful processes like tannin concentrate precipitation or chlorination may be reduced. Solvent extraction of germanium from solution after oxidative leaching of copper cake by
-
Understanding the Energy-Saving mechanism of ceramic balls in tumbling mills Miner. Eng. (IF 4.9) Pub Date : 2024-09-11 Xin Fang, Caibin Wu, Ningning Liao, Chengfang Yuan, Jiuxiang Zhong, Shenglin Zhu, Aijun Liu, Ke Xiao
This study investigates why ceramic balls achieve superior grinding performance compared to steel balls at lower densities and lower energy consumption. Particle motion analysis shows that increasing the filling level significantly improves the velocity distribution of the grinding media. The energy input from the mill is mainly converted into the kinetic and potential energy of the media, with potential
-
Assessment of a bio-inspired frothing agent derived from Vitamin E in mineral processing Miner. Eng. (IF 4.9) Pub Date : 2024-09-11 Pouria Amani, Tina Hsia, San H. Thang, Mahshid Firouzi
Frothers play a key role in froth flotation by stabilising bubbles, which serve as a platform for separation of minerals of interest. This paper presents D-α-Tocopherol Polyethylene Glycol 6000 Succinate (VitE_PEG6000), an eco-friendly green frother. VitE_PEG6000′s frothing performance was evaluated and benchmarked against MIBC using metrics such as the dynamic and static foam stability index (DFI
-
Flotation of a copper-cobalt sulphide ore: Quantitative insights into the role of mineralogy Miner. Eng. (IF 4.9) Pub Date : 2024-09-11 Quentin Dehaine, Laurens T. Tijsseling, Gavyn K. Rollinson, Hylke J. Glass
Cobalt is mainly produced globally from Cu-Co sediment-hosted deposits in the Democratic Republic of Congo. As mining operations progress, oxidic supergene mineralisation gradually depletes, and many have been or are shifting towards extracting sulphide ore at depth. Overall, copper recovery is consistently higher than cobalt, but no in-depth investigation has been conducted to determine if this difference
-
Pressure oxidative leaching of chromite in the NaOH-NaNO3-H2O binary sub-molten reaction medium Miner. Eng. (IF 4.9) Pub Date : 2024-09-10 Chengzong Jian, Yankuo Zhou, Mengzhi Jiang, Ying Wei, Chunyu Yan, Gang Li, Xuejun Quan
The liquid-phase oxidation of chromite ore in sub-molten medium is regarded as a clean and efficient method for the preparation of chromate. However, its industrial application is limited by the need for specialized equipment, stringent reaction conditions, and complex chromate-alkali separation processes. To enhance the leaching of chromite and achieve milder reaction conditions, this study introduces
-
Steel mill solid waste transformation: Optimizing converter sludge recycling through RHF technology Miner. Eng. (IF 4.9) Pub Date : 2024-09-10 Dongjie Zhou, Weitong Du, Jiayong Qiu, Chuanbo Zheng, Dianchun Ju, Shui Yu, Haiwei Yao, Han Ma, Rui Mao
Current methods for treating converter sludge include reintroducing it into the sintering or pelletizing process. However, this method leads to the enrichment of zinc in the blast furnace, which affects the stability of the production operation. To solve this problem, a direct reduction process utilizing multi-solid waste collaborative rotary hearth furnace (RHF) has been implemented in steel plants
-
The relationship between protons and the aqueous oxidation of pyrite by molecular oxygen Miner. Eng. (IF 4.9) Pub Date : 2024-09-07 Cristina E. Cârstea, Paul Chiriță
The reaction of pyrite (FeS2) with dissolved oxygen (DO) in acidic media (pH 2.5, 3.0 and 4.0) was studied at 25 °C. In this regard, a series of experimental (potentiodynamic polarization, Electrochemical Impedance Spectroscopy (EIS) or cyclic voltammetry) and theoretical (quantum calculations) approaches were used. It was found that the proton concentration ([H+]) has not a significant influence on
-
Utilization of phosphorylated starch as a selective depressant for serpentine in the flotation of nickel sulfide ore Miner. Eng. (IF 4.9) Pub Date : 2024-09-06 Chenxu Zhang, Yiping Tan, Fengxiang Yin, Jian Zhao, Zhiyong Gao, Wei Sun, Belinda McFadzean, Jian Cao
Serpentine is the primary gangue for the flotation enrichment of pentlandite. In this study, phosphorylated starch (PS) was synthesized via the esterification reaction of sodium phosphate with starch and employed as the depressant in separating pentlandite and serpentine through flotation. Micro-flotation results indicated that PS exhibited superior selective depressing effects on serpentine compared
-
Study on selective depression of pullulan on specularite/chlorite flotation Miner. Eng. (IF 4.9) Pub Date : 2024-09-05 Xianren Dai, Cheng Yang, Jiandong He, Mingyang Li
The inherent similarities in the physicochemical properties and floatability of specularite and chlorite pose challenges in their effective flotation separation. Exploration and utilization of efficient depressants is vital to improve the flotation separation performance. In this study, pullulan gum (PG) was employed as a depressant in the flotation separation of specularite and chlorite, employing
-
Leaching strategies for the recovery of Co, Ni, Cu and Zn from historical tailings Miner. Eng. (IF 4.9) Pub Date : 2024-09-05 Julia Alajoki, Anssi Karppinen, Tommi Rinne, Rodrigo Serna-Guerrero, Mari Lundström
Energy transition from fossil- to a material-intensive energy system is highly dependent on the availability of Co and Ni. This has increased interest towards non-traditional raw material streams such as mining waste. In this work, leaching experiments were conducted on historical flotation tailings with low concentrations of Co (0.081 wt%), Ni (0.055 wt%), Cu (0.15 wt%) and Zn (0.17 wt%). This low
-
Hydrometallurgical recovery of vanadium and calcium from electric arc furnace slag in hydrogen based steelmaking Miner. Eng. (IF 4.9) Pub Date : 2024-09-05 Maria Kokko, Mikael Manninen, Tao Hu, Ulla Lassi, Tuomas Vielma, Janne Pesonen
A two-stage direct leaching method has been applied to selectively recover calcium (Ca) and vanadium (V) from electric arc furnace slag obtained from pilot-scale smelting of hydrogen-reduced iron. Nitric acid-ammonium nitrate-water (HNO3-NH4NO3-H2O) medium was used in the first stage to produce leachate in which Ca and magnesium (Mg) composed over 99 wt% of the dissolved elements. Sodium carbonate-sodium
-
Selective depression of galena in the galena and chalcopyrite system by the Fe(II)-activated persulfate process Miner. Eng. (IF 4.9) Pub Date : 2024-09-05 Qinbo Cao, Yan Yan, Heng Zou, Haiyu Zhang, Dianwen Liu, Shuming Wen, Yanjun Li
The separation of galena (PbS) from chalcopyrite (CuFeS2) requires strong oxidants for the depression of PbS, due to the excellent hydrophobicity of PbS. In this work, an advanced oxidation process, i.e., S2O82−/Fe2+ treatment, was employed to selectively depress PbS. The parameters of the S2O82−/Fe2+ process were determined via flotation tests as follows: pH 3, 1:1 S2O82−: Fe2+ molar ratio, and 10 min
-
Classifying iron ore with water or dust adhesion combining differential feature and random forest using hyperspectral imaging Miner. Eng. (IF 4.9) Pub Date : 2024-09-04 Jinbao Jiang, Cheng Nie, Jiushuai Deng, Kangning Li, Lixin Jia, Tiancheng Sun, Zezheng Li
Hyperspectral imaging (HSI), a promising technique integrating imaging and spectroscopy, can help sort iron ores with different total iron (TFe) contents. However, the adhesion of dust (caused by crushing) or water can affect the sorting process. Currently, the mechanisms underlying this influence and methods to conveniently mitigate it remain unclear, hindering the practical application of HSI-based
-
Mineral classification with X-ray absorption spectroscopy: A deep learning-based approach Miner. Eng. (IF 4.9) Pub Date : 2024-09-04 Zheng Fang, Shiliang Song, Hanbo Wang, Huangping Yan, Mingke Lu, Siyuan Chen, Shunren Li, Wei Liang
The current suite of algorithms used in intelligent mineral sorting equipment is largely generic, lacking the necessary adaptability and the capability for simultaneous non-destructive structural detection and quantitative analysis. To address this, we have developed two specialized algorithms based on X-ray absorption spectroscopy: the Trans-LSTM algorithm based on Transformer and Long Short-Term
-
Copper tailings filtration: Influence of filter cake desaturation Miner. Eng. (IF 4.9) Pub Date : 2024-09-03 Bernd Fränkle, Thien Sok, Marco Gleiß, Hermann Nirschl
Copper mining produces immense amounts of tailings due to low ore grades. These residues are increasingly dewatered by filtration in recessed plate filter presses to ensure safer storage and high recovery of water. The process parameters filtration pressure, desaturation time, desaturation pressure and cake thickness have a significant influence on achieving water content as well as bulk material stability
-
Rising dynamics of particle-laden bubbles in presence of surfactant and turbulence Miner. Eng. (IF 4.9) Pub Date : 2024-09-03 Syamsundar M. Murali Mohan, Zhengbiao Peng, Elham Doroodchi
In the minerals industry, froth flotation is a commonly used method for separating valuable minerals from gangue. The design and efficient operation of flotation cells require a knowledge of the interplay between the system hydrodynamics and its chemistry. These parameters however are often examined in isolation using bare bubbles due to the system complexity. This study aims at investigating the coupled
-
Microwave-assisted alkaline fusion followed by water-leaching for the selective extraction of the refractory metals tungsten, niobium and tantalum from low-grade ores and tailings Miner. Eng. (IF 4.9) Pub Date : 2024-09-02 Jeroen Spooren, Wendy Wouters, Bart Michielsen, Elena M. Seftel, Steven-Friso Koelewijn
The refractory metals tungsten, tantalum and niobium are considered critical raw materials in Europe. Diversifying the supply of such materials, for instance by recovering refractory metals from local low-grade ore materials could reduce their supply risks. However, the extraction processes require to be efficient with a low energy and material consumption and a minimal environmental impact. In this
-
Impact of mechanical activation and mechanochemical activation on microstructural changes, leaching rate and leachability of natural chalcopyrite Miner. Eng. (IF 4.9) Pub Date : 2024-08-31 B.N. Akhgar, M. Kavanlouei, S. Farhoudi, M.H. Rohzad
The influence of mechanical activation (MA) and mechanochemical activation (MCA) with Fe and Fe2O3 on the microstructural changes, leachability and leaching rate of natural chalcopyrite was investigated and compared. MCA pretreatments were carried out by chalcopyrite co-milling with Fe and Fe2O3 for 20 and 50 min. The XRD analysis indicated that even after 50 min MA and MCA, constituent phases of chalcopyrite
-
Intensified extraction of vanadium from vanadium-bearing titanomagnetite (VTM) concentrate via one-stage leaching and solvent extraction using acidic organophosphorus extractant Miner. Eng. (IF 4.9) Pub Date : 2024-08-31 Kurniawan Kurniawan, Hyunju Lee, Mooki Bae, Jong-Won Choi, Sookyung Kim
Vanadium-bearing titanomagnetite (VTM) is a crucial source for vanadium production. Conventional methods for recovering vanadium from VTM involving combined pyro- and hydrometallurgy (production of vanadium-rich slag, followed by leaching) or direct leaching encounter significant challenges, such as vanadium losses and complexities in metal separation stage. This study proposes an innovative approach
-
Quantitative evaluation of the difference in residual collectors in sulfide and non-sulfide flotation processes Miner. Eng. (IF 4.9) Pub Date : 2024-08-31 Wenxuan Huang, Wenbiao Liu, Yongming Zheng, Feng Rao, Lang Yang, Kaixi Jiang
In this study, three separate flotation systems were studied to define the residual collectors found in different recycled water for sulfide (xanthate-chalcopyrite), non-sulfide with anionic (NaOL-dolomite) and cationic (DTAB-quartz) collector processes. The adsorption/desorption of collectors and the adsorption morphology were studied by the zeta potential and atomic force microscopy (AFM) measurements
-
Flotation separation mechanism of rutile and chlorite using CMC as depressant Miner. Eng. (IF 4.9) Pub Date : 2024-08-31 Peng Gong, Liuyi Ren, Shenxu Bao, Yimin Zhang, Wenqing Qin, Anh V. Nguyen
In ores containing rutile, chlorite is the most common silicate gangue mineral. However, the flotation separation of rutile and chlorite has yet to be thoroughly studied. In this study, carboxymethyl cellulose (CMC) was used to depress chlorite when sodium oleate (NaOL) was used as the collector of rutile. The selective depression and its mechanism were investigated through micro-flotation experiments
-
Iron extraction from copper slag by additive-free activation roasting-magnetic separation Miner. Eng. (IF 4.9) Pub Date : 2024-08-31 Xiaoxue Zhang, Hongyang Wang, Yuqi Zhao, Liqun Luo
Iron grain growth during deep reduction roasting is important for iron enrichment from copper slag (CS) through magnetic separation. In this work, a novel method of additive-free activation roasting, including oxidation and subsequent reduction roasting, was proposed to increase the iron grain size, then the iron was extracted by magnetic separation. The phase transformation of CS during activation
-
Validation of a PGNAA sensor model for bulk material sorting Miner. Eng. (IF 4.9) Pub Date : 2024-08-31 Dylan Peukert, Chaoshui Xu, Peter Dowd
Global mineral demand is forecast to increase significantly to achieve the transition to renewable energy. Greater volumes of ore of lower grade will have to be mined to meet demand. Techniques to process large volumes of low-grade ore efficiently are being investigated to reduce the cost and impact of mining. One technique is to use sensor information to sort mined material, allowing waste to be discarded
-
A novel IoT sensor and evolution model for grinding mill liner wear monitoring Miner. Eng. (IF 4.9) Pub Date : 2024-08-30 Tao Ou, Jie Liu, Wei Chen, Zepei Ma, Youwei Xiong
Tracking mill liner wear is essential for improved plant reliability and grinding performance. This study developed a novel IoT wear sensor and a Discrete Element Modelling coupled methodology to predict and continuously evolve shell liner’s wear pattern. The IoT sensor was purposely developed to track and report the live thickness of a shell liner. Global wear pattern was then obtained by coupling
-
Enhancement of copper mobilization using acidic AlCl3 − rich lixiviant Miner. Eng. (IF 4.9) Pub Date : 2024-08-30 Eric O. Ansah, Jay R. Black, Ralf R. Haese
Copper (Cu) extraction from low-grade ores is limited by the formation of secondary minerals that can passivate the surfaces of Cu-sulphide minerals in these ores. Hence, a novel approach utilizing AlCl3 as a lixiviant was developed to modify coupled dissolution-reprecipitation processes at the mineral interface. The formation of Al-rich phases instead of Fe-hydroxysulphates enhanced Cu extraction
-
Research on carbon emission accounting and carbon emission reduction path of coal preparation plant Miner. Eng. (IF 4.9) Pub Date : 2024-08-29 Xu Hongxiang, Wu Wei, Shi Bin, Liu Iibo, Cao Yijun, Deng Jiushuai, Cui Jiahua, Wang Jingzheng, Kang Yuntao, Sun Xin
“Peak carbon dioxide emissions、Carbon neutrality” is the two stage goal of carbon emission reduction proposed by China. Carbon emission accounting is the basic premise for effectively carrying out various carbon emission reduction work and promoting the green transformation of the economy. The coal industry is one of the key objects of carbon emission reduction. Taking Zhenneng Coal Preparation Plant
-
The effects of multielement basicity on niobium-bearing phase reconstruction in low grade niobium rougher concentrate Miner. Eng. (IF 4.9) Pub Date : 2024-08-29 Wensheng Han, Mengjie Ran, Xiang Lu, Chuling Jiang, Wen Chen
The beneficiation and recovery of ores with complex nature, low abundance have become the main direction for the development of niobium resources. The niobium resources with large reserves in Bayan Obo have not been effectively developed due to their fine particles, low grade, and complex nature. A new method for the phase reconstruction of minerals through a reconstruction process was proposed. The
-
Upcycling spodumene tailings in the preparation of high alumina porcelain composition sintered at 1200–1400 ˚C Miner. Eng. (IF 4.9) Pub Date : 2024-08-29 Patrick N. Lemougna, Nahal Abie, Arnold Ismailov, Erkki Levanen, Pekka Tanskanen, Katja Kilpimaa, Mirja Illikainen, Priyadharshini Perumal
Concentration of spodumene from lithium pegmatite ore generates large amounts of tailings that need to be recycled for sustainability and circular economy concerns. This study investigated the preparation of high-alumina porcelain compositions incorporating spodumene tailings, i.e., quartz feldspar silt (QFS). The mix design closely matched the theoretical composition of 60.51-wt.% Al2O3, 34.34-wt
-
Iron recovery from bauxite residue (BR) through magnetic separation; Effect of endogenous properties and processing conditions Miner. Eng. (IF 4.9) Pub Date : 2024-08-28 Panagiotis M. Angelopoulos, Paschalis Oustadakis, Georgios Anastassakis, Michael Pissas, Maria Taxiarchou
Bauxite residue (BR) is major by-product of the Bayer process for aluminium production, and its accumulation confers environmental risk due to its high alkalinity and fineness. The high Fe content and the BR abundance render it an attractive secondary source of iron, with magnetic separation being the preferable beneficiation technique applied for quality upgrade.
-
A practical green methodology for metal extraction from electric arc furnace dust through Yarrowia lipolytica biolixiviant Miner. Eng. (IF 4.9) Pub Date : 2024-08-27 Seyedeh Neda Mousavi, Seyyed Mohammad Mousavi, Francesca Beolchini
The study addresses the management of electric arc furnace dust (EAFD) generated by steel manufacturers and the challenge of metal leaching from this waste. Recognizing the scarcity of rare earth elements (REEs) and the industrial importance of manganese, the study emphasizes the urgent need for their recovery from waste. The current study presents a green approach using a biolixiviant from Yarrowia
-
Flow-induced erosion modelling of cohesive material with coupled CFD-DEM approach Miner. Eng. (IF 4.9) Pub Date : 2024-08-27 Mohsen Rahimi-Larki, Sandra Vollmann, Shengli Jin
Erosion is one of the continuous wear mechanisms in cohesive materials caused by the shear stress applied by the fluid flow at the liquid–solid interface. The erosion resistance of cohesive materials is significantly influenced by the strength of the cohesive bonds that hold the particles together, increasing the complexity of the mechanism. The erosion rate of cohesive materials depends on the critical
-
Activation mechanism of CoFe2O4 nanocatalysts on different oxidants and degradation efficiency of butyl xanthate Miner. Eng. (IF 4.9) Pub Date : 2024-08-27 Xiaoqi Wu, Zhaoyang Song, Qiongqiong He, Yifei Li, Pengxu Xiang, Yuan Xu, Ping Ma
Owing to the technological limitations associated with beneficiation technology, large amounts of flotation reagents remain in mineral processing wastewater, which is extremely detrimental to humans and the environment. In addition, direct reuse of mineral processing wastewater will adversely affect the entire mine water system. Efficient treatment of residual butyl xanthate from tailing wastewater
-
High purity alumina production by leaching-ion exchange process: Design and flowchart proposal Miner. Eng. (IF 4.9) Pub Date : 2024-08-25 Luís Henrique do Nascimento dos Santos, Bárbara da Rocha Pereira, Morgana Rosset, Denise Crocce Romano Espinosa, Amilton Barbosa Botelho Junior
Growing demand for high-purity Al2O3 for the electronic market and green energy production, allied with the need to decrease waste generation and dam use, will impact the future of mining, and new processes should be developed. The present study aimed to develop a hydrometallurgical process to obtain high-purity Al2O3 from bauxite. Among the samples studied, BX03 had the highest Al2O3 (63.8 %) and
-
An investigation into the effect of Eh and pH on the adsorption of a xanthate collector on sperrylite (PtAs₂): A surface and solution characterization study Miner. Eng. (IF 4.9) Pub Date : 2024-08-24 A. Wali, L. Filippov, A.M. Fekry, C.T. O’Connor, B. McFadzean
There is evidence of a very weak interaction between sperrylite and xanthate collectors at pH 9, the typical pH used in PGM concentrators. This results in the mineral being hardly hydrophobic when exposed to such collectors. Xanthate collectors adsorb via an electrochemical mechanism which is dependent on pH and Eh. In this study, it was shown that potassium amyl xanthate (PAX) adsorption increases
-
Kinetics of regeneration of oxidative Cu(II) and Fe(III) species in aerated acid chloride leaching solutions at 75 °C Miner. Eng. (IF 4.9) Pub Date : 2024-08-24 Katherine Jaramillo, Simón Díaz-Quezada, Gonzalo Montes-Atenas, Humberto Estay, Tomás Vargas
In the leaching of copper sulfide ores or refractory gold ores in chloride solutions, the regeneration of oxidative agents such as Cu (II) and Fe (III) is a key aspect for a sustainable process over time. This regeneration is carried out from the oxidation of Cu (I) and Fe (II) with O2, which helps to maintain a conveniently high oxidative potential in solution and a high leaching efficiency. In this
-
-
Investigation on the flotation of a mixed collector and its mechanism for enhancing low-rank coal flotation: Effect of micro adsorption and its interaction with gangue particle Miner. Eng. (IF 4.9) Pub Date : 2024-08-23 Zhixuan Xie, Lei Zhang, Shengyu Liu
The flotation effect of the association formed by dodecyl trimethyl ammonium bromide (DTAB) and dodecyl alcohol polyoxyethylene ether sodium sulfate (AES), and nonpolar kerosene mixed collectors on low-rank coal (LRC) was investigated. The results show that the combustible matter recovery was significantly improved compared with a single kerosene from 49.88% to 74.97% when the the mixed collector was
-
Cyclic biomachining of copper: Maximum metal removal rate with minimum depleted solution Miner. Eng. (IF 4.9) Pub Date : 2024-08-23 Arrate Santaolalla, Naiara Rojo, Astrid Barona, Gorka Gallastegui
Bacterially assisted leaching has been proposed for many innovative applications, such as urban mining or micromachining, but many technical challenges including substrate toxicity and downstream processing of the leach liquor must be solved before its industrial implementation. This study was conducted with the final goal of improving the average specific metal removal rate (SMRR) and reducing the
-
Minimizing entrainment recovery of ultrafine silicate minerals in pentlandite flotation using carboxymethyl cellulose Miner. Eng. (IF 4.9) Pub Date : 2024-08-23 Linda D. Ayedzi, Massimiliano Zanin, William Skinner, George B. Abaka-Wood
The presence of silicate minerals is a common occurrence in various ore types, including nickel sulphide ores. These silicate minerals dilute the grade of flotation concentrates through recovery by entrainment which leads to poor flotation performance and subsequently loss of values. Flotation by entrainment is further enhanced as the particle size of the feed becomes finer. The present work investigates
-
A multivariable submersible sensor for monitoring in real-time industrial flotation cells Miner. Eng. (IF 4.9) Pub Date : 2024-08-23 M. Maldonado, I. Ramos, J. Martinez, A. Artigas, P. Bustos, M. Morales, N. Miranda
This paper describes the development and validation of a submersible sensing technology for industrial flotation cells. The sensor provides simultaneous real-time measurements of gas and solid holdups, as well as the density and viscosity of the slurry in the pulp zone of flotation machines. The submersible device comprises a gas exclusion cell, which resembles an inverted truncated cone assembled
-
Reinforced co-leaching of REEs/Nb/Ti from low-grade concentrate mixture: Decomposition behavior and co-leaching mechanism Miner. Eng. (IF 4.9) Pub Date : 2024-08-22 Yubo Ge, Xinbing Xia, Louyan Shen, Guiqing Zhang, Qinggang Li, Shengxi Wu, Zhiyong Gao
Baerzhe ore deposit is rich in such critical elements as rare earth elements (REEs), niobium (Nb), and titanium (Ti). However, in this ore, the REEs/Nb/Ti-bearing minerals are interlocked closely and thus not easily liberated and separated from each other by mineral processing methods. In order to achieve high recoveries of these critical elements, a concentrate mixture of REEs/Nb/Ti minerals can be
-
Selective extraction of lithium and solidified fluoride from overhaul slag by the calcium sulfate roasting and water leaching Miner. Eng. (IF 4.9) Pub Date : 2024-08-21 Liangmin Dong, Fen Jiao, Wei Liu, Chen Wang, Dakun Wang, Wenqing Qin
Overhaul slag is a hazardous waste which is from the process of aluminum electrolysis industry. In this work, a technology of calcium sulfate roasting and water leaching was developed to dispose of overhaul slag. The effects of roasting and leaching parameters were investigated in detail. Under the optimal roasting conditions, the fluorine could be stably solidified into CaF2, and lithium could be
-
Recovery of platinum group elements (PGEs) from wastewater: A case for the development of predictive adsorption numerical methods Miner. Eng. (IF 4.9) Pub Date : 2024-08-21 Alseno K. Mosai, Raymond H. Johnson, Hlanganani Tutu
Platinum group elements (PGEs) are very important for the modern world, and they are used in many applications due to their physical and chemical properties that cannot be found in other naturally occurring elements. This means that the availability of PGEs now and in the future is very crucial. However, research has indicated that PGEs are at the edge of becoming scarce due to gradually depleting
-
Quantitative study on the selective depressing effect of polysaccharides on some polar minerals Miner. Eng. (IF 4.9) Pub Date : 2024-08-21 Jizhen Wang, Jiahao Chen, Ronglu Yan, Jiaqi Zhang, Jiawei Li
This study presents a systematic summary on the depressing effect of polysaccharides on some polar minerals, revealing that the order of their depressing strength on some polar minerals was primarily associated with the surface properties of the minerals, showing a limited correlation with the structure of polysaccharides. Subsequently, the selective depressing mechanism of polysaccharides on polar
-
3D feature characterization of flotation froth based on a dual-attention encoding volume stereo matching model and binocular stereo vision extraction Miner. Eng. (IF 4.9) Pub Date : 2024-08-21 Fuyue Hu, Yuping Fan, Xiaomin Ma, Xianshu Dong, Zengchao Feng, Yujin Sun, Jian Niu
This study focuses on the parameters necessary for the successful deployment of intelligent control systems for flotation processes, focusing on froth surface characteristics. Depth information is not available for conventional 2D features extracted from single froth images, thereby constraining their capacity to fully capture froth surface characteristics. To overcome this limitation, this study proposes
-
Modelling breakage of steelmaking materials for simulation of mechanical degradation during handling Miner. Eng. (IF 4.9) Pub Date : 2024-08-20 Rodrigo M. de Carvalho, Luís Marcelo Tavares
Mechanical degradation of steelmaking materials can have significant economic and environmental implications. Such degradation typically occurs as result of impacts during transportation and handling from their production site to the steelmaking furnace, in operations that include transfers in chutes, ship loading, stockpiling, reclaiming, wagon loading and discharging, etc. Predicting the extent of
-
Experimental and theoretical investigations into the surface chemical properties and separation of serpentine from quartz using xanthomonas campestris as a selective flocculant Miner. Eng. (IF 4.9) Pub Date : 2024-08-19 Levie Mweene, Govinda P. Khanal, Jackson Kawala, Kennedy Chikontwe
Separation of fine serpentine (SPT) from quartz (QZ) both of d80 close to 20 µm using an eco-friendly microbial exo-polysaccharide, xanthomonas campestris (XCT), as a selective flocculant for SPT was conducted experimentally and substantiated theoretically. The adsorption of XCT onto SPT was observed to decrease with increase in pH, whereas that of QZ was nearly nil beyond pH 2.1. Zeta potential of
-
Selective aggregation of hematite from quartz using charged polyacrylamides: In-situ sizing Miner. Eng. (IF 4.9) Pub Date : 2024-08-18 Jackquline C. Eardley, Casey A. Thomas, George V. Franks
Recovering fine valuable material has been a significant challenge in minerals processing. This primarily stems from insufficient collision opportunities between fine particles and bubbles, specifically when utilising traditional recovery methods such as froth flotation. This research endeavours to address this challenge by exploring the use of various commercially available, high molecular weight
-
Performance comparison of laboratory scale air classifier and hydrocyclone at the same target size Miner. Eng. (IF 4.9) Pub Date : 2024-08-18 Vatan Tipici, Alper Toprak, Okay Altun
The research aimed at comparing the performances of two common centrifugal type classifiers, air classifier and hydrocyclone, operated dry and wet respectively. The reason for starting the study is the possible shifting to dry processing in the future as the water has limited availability. Such comprehensive research has not been undertaken in the literature although individual assessments were completed
-
Mesoscopic influence mechanism of particle fragmentation on compressive deformation of gangue aggregates with different gradations under load Miner. Eng. (IF 4.9) Pub Date : 2024-08-17 Laiwei Wu, Junmeng Li, Yanli Huang, Peng Huang, Changde Yang, Zizhao Ding, Hong Yu
The crushing and deformation behavior of gangue aggregate is a key factor affecting the stability of the overburden in goaf, and the particle size gradation has a significant impact on the particle fragmentation and compressive deformation of gangue aggregate. In this study, compression tests on crushed gangue aggregates with different particle size gradations were conducted, and the fragmentation
-
Modeling copper leaching from non-pulverized printed circuit boards at high concentrations of bioregenerated ferric sulfate Miner. Eng. (IF 4.9) Pub Date : 2024-08-16 Pablo Ramírez, Nieves Iglesias-González, Antonio D. Dorado
This work studies the leaching of copper contained in waste printed circuit boards (PCB) with ferric sulfate, with the aim of improving the results found in the literature for an industrial application of the process. For this purpose, temperatures and concentrations of ferric ion higher than those of previous works (up to 60 °C and 40 g/L) are used. Furthermore, ferric sulfate can be continuously
-
Oxidation of nickel concentrates in simulated reaction shaft conditions of the flash smelter Miner. Eng. (IF 4.9) Pub Date : 2024-08-15 Min Chen, Dmitry Sukhomlinov, Pekka Taskinen, David Grimsey, Anthony Rich, Ari Jokilaakso
The suspension oxidation of nickel sulfide concentrates in flash smelting conditions was studied using a laboratory-scale laminar flow furnace. The effects of temperature (800–1100 °C) and oxygen concentration (40–85 vol%) in the process gas were investigated. The surface morphology and mineralogical compositions of samples were examined using scanning electron microscopy equipped with energy-dispersive
-
Valorization of lithium containing slags from pyrometallurgical recycling route of spent lithium-ion batteries: The enrichment of γ-LiAlO2 phase from thermodynamic controlled and modified slags Miner. Eng. (IF 4.9) Pub Date : 2024-08-15 Hao Qiu, Haojie Li, Michael Fischlschweiger, Marko Ranneberg, Torsten Graupner, Hugo Lucas, Christin Stallmeister, Bernd Friedrich, Bengi Yagmurlu, Daniel Goldmann
Pyro-metallurgical processing technology is widely used in the spent lithium-ion batteries recycling to recover valuable metals such as cobalt, nickel and copper, while lithium primarily remains in the slag. The effective valorization of slag, especially lithium recovery, constitutes a significant issue in contemporary pyrometallurgical processes due to the paucity of studies. This paper proposes a
-
Flotation froth image enhancement based on region decomposition and guided filtering Miner. Eng. (IF 4.9) Pub Date : 2024-08-13 Yongfang Xie, Bin Zhang, Shiwen Xie, Zhaohui Tang
Extraction of information from froth images is important for automatic control of froth flotation. However, images captured by cameras often suffer from severe uneven lighting, which significantly reduces the quality of froth images. Low-quality images hinder the accurate extraction of froth information, thereby affecting the control of the froth flotation system. Hence, we propose an image enhancement