Minerals Engineering最新文献_第5页

Selective leaching of Ga and Ge from zinc powder replacement residue and determining influential role of magnetic field with an ultrasonic field

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-02-05 DOI: 10.1016/j.mineng.2025.109196

Tianxiang Zheng , Yuanxin Liang , Dewei Xun , Meng Sun , Biao Ding , Zhe Shen , Qiang Li , Peijian Shi , Bangfei Zhou , Chunmei Liu , Caigui Wu , Weili Ren , Yunbo Zhong

Gallium (Ga) and germanium (Ge) are rare metals crucial for national applications in semiconductor and military sector. The metals are usually leached from zinc powder replacement residue (ZPRR) produced in the wet zinc refining process. In this study, Ge and Ga were leached from sulfuric acid with the application of a strong magnetic field and an ultrasonic field. The leaching mechanism in the strong magnetic field and ultrasonic field was studied using various characterization techniques such as XRD, SEM, XPS, FT-IR, etc. Kinetic studies show that the leaching of Ga and Ge from ZPRR is influenced by a combination of surface chemical processes and diffusion of reactants. When under the influence of 10 T magnetic field, the apparent activation energy for Ga and Ge were 30.44 kJ/mol and 30.97 kJ/mol, respectively. When the 10 T strong magnetic field was compound with a 360 W ultrasonic field, the apparent activation energy for Ga and Ge fell to 24.70 kJ/mol and 20.43 kJ/mol, respectively. Through XPS, FT-IR, XRD, it was found that the strong magnetic field can influence and suppress the hydrolysis of Fe(OH)₃ during the reaction process and can also alter the existence form of Si(OH)₄. Moreover, the combined ultrasonic field can also break the ZPRR encapsulating structure, intensifying the boosting impact of the magnetic field. The optimal leaching parameters were discovered by one-factor experiments and response surface methodology (RSM). This investigation proposes a novel and effective leaching technique for the extraction of Ga and Ge from ZPRR, while concurrently mitigating the environmental risks associated with ZPRR processing.

{"title":"Selective leaching of Ga and Ge from zinc powder replacement residue and determining influential role of magnetic field with an ultrasonic field","authors":"Tianxiang Zheng , Yuanxin Liang , Dewei Xun , Meng Sun , Biao Ding , Zhe Shen , Qiang Li , Peijian Shi , Bangfei Zhou , Chunmei Liu , Caigui Wu , Weili Ren , Yunbo Zhong","doi":"10.1016/j.mineng.2025.109196","DOIUrl":"10.1016/j.mineng.2025.109196","url":null,"abstract":"<div><div>Gallium (Ga) and germanium (Ge) are rare metals crucial for national applications in semiconductor and military sector. The metals are usually leached from zinc powder replacement residue (ZPRR) produced in the wet zinc refining process. In this study, Ge and Ga were leached from sulfuric acid with the application of a strong magnetic field and an ultrasonic field. The leaching mechanism in the strong magnetic field and ultrasonic field was studied using various characterization techniques such as XRD, SEM, XPS, FT-IR, etc. Kinetic studies show that the leaching of Ga and Ge from ZPRR is influenced by a combination of surface chemical processes and diffusion of reactants. When under the influence of 10 T magnetic field, the apparent activation energy for Ga and Ge were 30.44 kJ/mol and 30.97 kJ/mol, respectively. When the 10 T strong magnetic field was compound with a 360 W ultrasonic field, the apparent activation energy for Ga and Ge fell to 24.70 kJ/mol and 20.43 kJ/mol, respectively. Through XPS, FT-IR, XRD, it was found that the strong magnetic field can influence and suppress the hydrolysis of Fe(OH)<sub>3</sub> during the reaction process and can also alter the existence form of Si(OH)<sub>4</sub>. Moreover, the combined ultrasonic field can also break the ZPRR encapsulating structure, intensifying the boosting impact of the magnetic field. The optimal leaching parameters were discovered by one-factor experiments and response surface methodology (RSM). This investigation proposes a novel and effective leaching technique for the extraction of Ga and Ge from ZPRR, while concurrently mitigating the environmental risks associated with ZPRR processing.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"224 ","pages":"Article 109196"},"PeriodicalIF":4.9,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular dynamics simulation of flotation of difficult-to-float oxidized coal slime enhanced by polar and non-polar mixed collectors

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-02-04 DOI: 10.1016/j.mineng.2025.109195

Dahu Li , Fangjia Yang , Peng Wang , Zhao Cao , Jieliang Wang

Aiming at the problem of poor flotation effect of oxidized coal slime, this study used a composite flotation collector compounded with diesel oil (DO) and an alcohol polar collector reagent (KD) in order to improve the flotation effect. Through the flotation test, combined with the molecular dynamics simulation method, the effect of the mixed collector on the flotation of oxidized coal was investigated, and the adsorption characteristics of the mixed collector with different ratios in the oxidized coal/water/reagent system were explored, including the parameters of the relative concentration distribution, the contact surface area and the interaction energy. The compatibility of six different components of DO with KD reagent was also investigated. The results showed that compared with the use of diesel fuel only, using the mixed collector with a DO:KD ratio of 4:1, the ash content of the cleaned coal did not change much, the cleaned coal yield could be increased by 20.07%, and the combustible matter recovery could be increased by 25.29%. The KD molecules in the mixed collector can adsorb with the hydrophilic parts on the surface of oxidized coal and cover the hydrophilic sites on the surface of oxidized coal, so that the DO/KD molecules can adsorb together on the surface of oxidized coal and enhance the hydrophobicity of the surface of oxidized coal. When the proportion of KD in the mixed collector exceeds 20%, some KD molecules undergo self-polymerization, forming semi-micellar adsorption through hydrophobic binding, which will reduce the effect of the mixed collector. In addition, carbazole and dibenzothiophene among the DO components have the closest Chi values to 0 and smaller ΔE values, which have the best compatibility with the polar reagent KD and better chemical reaction activity, and can better enhance the flotation effect of oxidized coal slime.

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引用次数: 0

Reverse flotation of iron ore by a new ternary collector-frother reagent: Applications through flotation experiments

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-30 DOI: 10.1016/j.mineng.2025.109181

Michelle Lacerda Sales Marques , Lucas Andrade Silva , Letícia Maia Prates , Alexandre Moni Pereira , Julio Cesar Guedes Correia , Inna V. Filippova , Lev O. Filippov

The reverse flotation of iron ore with etheramine collectors and starch as depressant is widely implemented industrially but has severe shortcomings in dealing with complex lithologies and reclamation of slimes and tailings. Previously, we explored the adsorption of a new ternary collector reagent based on a mixture of etheramine, amidoamine and a frother. FTIR band intensities point to favorable adsorption of reagent on quartz and kaolinite, lower on hematite and virtually null adsorption on goethite. Molecular dynamics simulation was also employed to reveal adsorption configurations and molecular orientations and density profiles. This paper aims to investigate the same ternary collector formulation for goethitic iron ore reverse flotation in absence of a depressant agent. Single minerals including quartz, kaolinite, hematite and goethite, and synthetic mixtures bench flotation kinetic experiments were performed, and kinetic flotation models were fitted to help rationalizing the results. The results indicate the new formulation as a more effective collector than the corresponding etheramine and amidoamine components under the studied conditions. The ternary collector allowed reaching high purity concentrates in hematite and goethite mixtures with quartz. A synthetic quaternary mixture also reproduced the performance of a real slimes sample, with even less iron loss to tailing due to particle size differences, which is a critical parameter for real slimes. Additionally, it is also suggested that goethite loss is driven by entrainment rather than true flotation, while hematite seems to be floated by both mechanisms. Quartz is well separated but kaolinite’s presence stems as the main shortcoming in these systems, since it is not well floated and also hinders the flotation of quartz. In cases of low content of kaolinite high purity concentrates were obtained, pointing the feasibility of a goethite desilication process without depressant.

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引用次数: 0

Ferronickel recovery from 2-stage thermally treated ultramafic nickel sulfide concentrate

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-28 DOI: 10.1016/j.mineng.2025.109178

Wei Lv , Brian Makuza , Samuel Marcuson , Manqiu Xu , Frederick D. Ford , Mansoor Barati

Nickel (Ni) is a critical metal facing a sharp increase in demand as it is a key ingredient in clean energy technologies such as lithium-ion batteries (LIBs) for electric vehicles (EVs). The gradual depletion in the active high-grade Ni sulfide deposits has garnered more attention toward Ni extraction from low-grade ultramafic Ni sulfides. Although the low-grade ultramafic sulfide deposits have the benefits of being amenable to surface mining and low sulfur content, which translates to fewer sulfur emissions, their high MgO content raises the slag liquidus temperature and viscosity pushing the need for higher smelting temperatures. Our previous work developed a novel 2-stage thermal treatment process for extracting nickel from low-grade ultramafic nickel concentrates. Although promising results were obtained, further work was required to understand and fully optimize the separation process of the magnetic FeNi alloy from the non-magnetic gangue. Thus, this study comprehensively assesses the feasibility and conditions needed for producing high-grade ferronickel products. An efficient magnetic separation process flowchart detailing the optimum conditions for each process stage was developed. The optimal conditions were grinding the thermal treatment product to below 38 μm followed by magnetic separation using a magnetic field intensity of 0.025T. Under these conditions, the nickel recovery reached 80 %, the nickel grade was 26 %, and the Ni separation efficiency was above 65 %, within the acceptable ranges. Lastly, the study systematically investigated the phase transformations, micromorphology, and Ni distribution in the alloy, magnetic concentrate, and tails, aiming to fully understand the effect of variable factors such as particle size of the ground product and magnetic field intensity.

{"title":"Ferronickel recovery from 2-stage thermally treated ultramafic nickel sulfide concentrate","authors":"Wei Lv , Brian Makuza , Samuel Marcuson , Manqiu Xu , Frederick D. Ford , Mansoor Barati","doi":"10.1016/j.mineng.2025.109178","DOIUrl":"10.1016/j.mineng.2025.109178","url":null,"abstract":"<div><div>Nickel (Ni) is a critical metal facing a sharp increase in demand as it is a key ingredient in clean energy technologies such as lithium-ion batteries (LIBs) for electric vehicles (EVs). The gradual depletion in the active high-grade Ni sulfide deposits has garnered more attention toward Ni extraction from low-grade ultramafic Ni sulfides. Although the low-grade ultramafic sulfide deposits have the benefits of being amenable to surface mining and low sulfur content, which translates to fewer sulfur emissions, their high MgO content raises the slag liquidus temperature and viscosity pushing the need for higher smelting temperatures. Our previous work developed a novel 2-stage thermal treatment process for extracting nickel from low-grade ultramafic nickel concentrates. Although promising results were obtained, further work was required to understand and fully optimize the separation process of the magnetic FeNi alloy from the non-magnetic gangue. Thus, this study comprehensively assesses the feasibility and conditions needed for producing high-grade ferronickel products. An efficient magnetic separation process flowchart detailing the optimum conditions for each process stage was developed. The optimal conditions were grinding the thermal treatment product to below 38 μm followed by magnetic separation using a magnetic field intensity of 0.025T. Under these conditions, the nickel recovery reached 80 %, the nickel grade was 26 %, and the Ni separation efficiency was above 65 %, within the acceptable ranges. Lastly, the study systematically investigated the phase transformations, micromorphology, and Ni distribution in the alloy, magnetic concentrate, and tails, aiming to fully understand the effect of variable factors such as particle size of the ground product and magnetic field intensity.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"223 ","pages":"Article 109178"},"PeriodicalIF":4.9,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review of phyllosilicate minerals in flotation: Mechanisms of deleterious effect and mitigation method

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-27 DOI: 10.1016/j.mineng.2025.109180

Guohua Gu, Jianyu Chen, Mengchi Guo, Yanhong Wang

High content of phyllosilicate minerals has a deleterious effect on the mineral flotation process. In clay science, with increasing the solid concentration, phyllosilicate mineral particles associate into different network structures, according to the relative potentials and positions of basal faces and edge faces, which plays a dominant role in the flow behaviour of pulp. In this paper, the effect of phyllosilicate minerals on flotation is reviewed through entrainment, slime coating and pulp rheology. The methods for mitigating the deleterious effect of phyllosilicate minerals in flotation are also discussed microscopically and macroscopically. However, merging phyllosilicate mineralogy to their metallurgical effects is an area with even less conclusive outcomes to date. Based on this, understanding the phyllosilicate mineralogy would fortifying the research from phyllosilicate mineralogy to the network structure, rheology and flotation. Thus, selective altering the network structure of phyllosilicate minerals would be a promising method in enhancing the overall flotation performance with high content of phyllosilicate minerals, since the network structures could be able to combine the microscopic surface potentials with macroscopic pulp rheology together.

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引用次数: 0

Evaluating cryogenic grinding variables to maximize valuable metal liberation from spent lithium-ion batteries

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-27 DOI: 10.1016/j.mineng.2025.109193

F. Mulet-Mery, Jorge Uribe, J. Valenzuela-Elgueta, Cristian Serrano

This study explores the liberation of valuable metals from spent Lithium Ion Batteries (LIBs) following cryogenic grinding with varying grinding times, frequencies, and particle sizes. We characterize the physicochemical changes in lithium metal oxide particles focusing on the mineral phases, semi-quantification, and liberation of Co, Ni, and Mn. A total of 18 cathodic material samples underwent cryogenic grinding. Additionally, one sample was processed through conventional grinding for comparison. Grinding variables included frequencies of 10, 20, and 30 Hz, and durations of 3, 5, and 7 min. Subsequently, all tests were analyzed to determine their D₈₀ value. The response surface methodology was used to ascertain the frequency and time variables with the greatest influence on D₈₀ values. A predictive regression model was then applied to find the best D₈₀ value. This statistical analysis was also used to choose the samples for X-ray Diffraction (XRD), Scanning Electronic Microscope − Energy Dispersive Spectroscopy (SEM-EDS), and Quantitative Evaluation of Minerals by Scanning Electron Microscopy (QEMSCAN) characterization. Characterization results revealed that LiCoO₂ and Co₃O₄ particles have distinct spatial distributions compared to (Li_0.65Ni_0.05)(NiO₂) and Li_1.27Mn_1.73O₄ particles, which exhibited similar spatial distributions. LiCoO₂ and Co₃O₄ particles achieved a high degree of liberation at 20 and 30 Hz frequencies and were liberated even at coarser particle size distributions of approximately < 450 μm when the frequency was equal to 10 Hz. In contrast, (Li_0.65Ni_0.05)(NiO₂) and Li_1.27Mn_1.73O₄ particles demonstrated a much lower degree of liberation tending to aggregate and be locked, but they were liberated at < 38 μm size distributions at all frequencies analyzed. Results show that cryogenic grinding is superior to the traditional grinding method. Furthermore, the specific results of the predictive regression model indicate the optimal D₈₀ value of 55.82 μm can be achieved with a grinding frequency of 39 Hz and 7 min of constant grinding, enhancing the overall recovery efficiency for all target metals.

{"title":"Evaluating cryogenic grinding variables to maximize valuable metal liberation from spent lithium-ion batteries","authors":"F. Mulet-Mery, Jorge Uribe, J. Valenzuela-Elgueta, Cristian Serrano","doi":"10.1016/j.mineng.2025.109193","DOIUrl":"10.1016/j.mineng.2025.109193","url":null,"abstract":"<div><div>This study explores the liberation of valuable metals from spent Lithium Ion Batteries (LIBs) following cryogenic grinding with varying grinding times, frequencies, and particle sizes. We characterize the physicochemical changes in lithium metal oxide particles focusing on the mineral phases, semi-quantification, and liberation of Co, Ni, and Mn. A total of 18 cathodic material samples underwent cryogenic grinding. Additionally, one sample was processed through conventional grinding for comparison. Grinding variables included frequencies of 10, 20, and 30 Hz, and durations of 3, 5, and 7 min. Subsequently, all tests were analyzed to determine their D<sub>80</sub> value. The response surface methodology was used to ascertain the frequency and time variables with the greatest influence on D<sub>80</sub> values. A predictive regression model was then applied to find the best D<sub>80</sub> value. This statistical analysis was also used to choose the samples for X-ray Diffraction (XRD), Scanning Electronic Microscope − Energy Dispersive Spectroscopy (SEM-EDS), and Quantitative Evaluation of Minerals by Scanning Electron Microscopy (QEMSCAN) characterization. Characterization results revealed that LiCoO<sub>2</sub> and Co<sub>3</sub>O<sub>4</sub> particles have distinct spatial distributions compared to (Li<sub>0.65</sub>Ni<sub>0.05</sub>)(NiO<sub>2</sub>) and Li<sub>1.27</sub>Mn<sub>1.73</sub>O<sub>4</sub> particles, which exhibited similar spatial distributions. LiCoO<sub>2</sub> and Co<sub>3</sub>O<sub>4</sub> particles achieved a high degree of liberation at 20 and 30 Hz frequencies and were liberated even at coarser particle size distributions of approximately < 450 μm when the frequency was equal to 10 Hz. In contrast, (Li<sub>0.65</sub>Ni<sub>0.05</sub>)(NiO<sub>2</sub>) and Li<sub>1.27</sub>Mn<sub>1.73</sub>O<sub>4</sub> particles demonstrated a much lower degree of liberation tending to aggregate and be locked, but they were liberated at < 38 μm size distributions at all frequencies analyzed. Results show that cryogenic grinding is superior to the traditional grinding method. Furthermore, the specific results of the predictive regression model indicate the optimal D<sub>80</sub> value of 55.82 μm can be achieved with a grinding frequency of 39 Hz and 7 min of constant grinding, enhancing the overall recovery efficiency for all target metals.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"223 ","pages":"Article 109193"},"PeriodicalIF":4.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced vibration dewatering to facilitate efficient disposal process for waste fine flotation tailings

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-24 DOI: 10.1016/j.mineng.2025.109177

Miao Pan , Tong Xu , Jiawang Lu , Chenlong Duan , Wei Shi , Long Huang , Yidong Shen , Jiale Yuan , Jinpeng Qiao , Haishen Jiang

Waste fine flotation tailings (WFFTs) constitute a type of ore slurry consisting of fine tailing particles and beneficiation wastewater produced in the mineral flotation process. It can lead to resource wastage and ecological pollution due to irrational disposal process. This study aimed at recovering the useful building materials and water resources via reprocessing WFFTs by classification, magnetic separation, and dewatering processes. Vibration dewatering is essential and first step during the dewatering of product, which can aid in recovering beneficiation wastewater and reduce the workload of the subsequent dewatering operations, significantly lowering the energy consumption. In this study, a screen surface structure with variable elasticity was proposed to enhance the dewatering performance. Further, the response laws of moisture content with respect to the factors such as vibration intensity gradient, solid concentration, feed rate, and screen aperture size were systematically explored, and the advantages of the vibration screen in industrial dewatering were verified. The average moisture contents of tailings sand, magnetic material, and non-magnetic material were 17.43 %, 19.36 %, and 17.23 %, respectively. The breakthrough of the vibration dewatering technology ensured efficient and stable operation of the tailing disposal process, and thus the transformation of WFFTs into useful resources such as building sand, dry-mixed mortar, and building ceramics was successfully achieved. Interestingly, the beneficiation plant was expected to generate economic benefits far exceeding $2.6 million per year. This study provides a possible innovative path for building an environmentally-friendly mining enterprise.

废细浮选尾矿（WFFTs）是由矿物浮选过程中产生的细小尾矿颗粒和选矿废水组成的一种矿浆。由于处理过程不合理，会造成资源浪费和生态污染。本研究旨在通过分级、磁选和脱水工艺对 WFFT 进行再处理，回收有用的建筑材料和水资源。振动脱水是产品脱水过程中必不可少的第一步，可帮助回收选矿废水，减少后续脱水操作的工作量，显著降低能耗。本研究提出了一种具有可变弹性的筛面结构，以提高脱水性能。此外，还系统探讨了含水率与振动强度梯度、固体浓度、进料速度和筛孔尺寸等因素的响应规律，验证了振动筛在工业脱水中的优势。尾砂、磁性材料和非磁性材料的平均含水率分别为 17.43 %、19.36 % 和 17.23 %。振动脱水技术的突破确保了尾矿处理工艺的高效稳定运行，从而成功实现了将水力浮选尾矿转化为建筑用砂、干混砂浆和建筑陶瓷等有用资源。有趣的是，选矿厂预计每年产生的经济效益远远超过 260 万美元。这项研究为建设环境友好型采矿企业提供了一条可能的创新之路。

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引用次数: 0

Review of beneficiation techniques and new thinking for comprehensive utilization of high-phosphorus iron ores

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-21 DOI: 10.1016/j.mineng.2025.109176

Guangheng Ji , Xu Gao , IL Sohn , Shigeru Ueda , Wanlin Wang

As the world faces the rapid depletion of high-grade iron ore reserves, the abundant high-phosphorus iron ore deposits present significant potential for future exploitation. These ores, rich in the valuable elements of iron and phosphorus, necessitate the development of practical processes for upgrading iron and recovering phosphorus. Consequently, to promote the foundation and application research of high-phosphorus iron ores, this review first describes the mineralogical characteristics of two typical high-phosphorus iron ores including oolitic hematite and other iron ores. Secondly, this paper comprehensively reviews various beneficiation techniques for high-phosphorus iron ores such as physical beneficiation, hydrometallurgy, pyrometallurgy, and their combined processes. Furthermore, technical challenges are summarized and discussed. Finally, to develop an eco-friendly method for treating ores on a large scale, a comprehensive direction of simultaneous concentration and separate recovery of iron and phosphorus from high-phosphorus iron ores is proposed. The process focuses on three topics: (1) Simultaneous concentration of iron and phosphorus during reduction roasting; (2) Dephosphorization for high-phosphorus hot metal using multi-phase slag; (3) Utilization of phosphorus from high-phosphorus slag. This strategy aims to enhance the value-added utilization of these resources and provide a guideline for the future development and utilization of high-phosphorus iron ores.

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引用次数: 0

Corrigendum to “Influence of calcination conditions on deep eutectic solvents (DES) leaching efficiency of light rare earth elements in bastnasite ore” [Miner. Eng. 220 (2025) 109087]

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-13 DOI: 10.1016/j.mineng.2025.109175

S. Samet Kaplan , Cisem Celik Kurtulan , Sebahattin Gurmen , Gokhan Orhan , M. Seref Sonmez

引用次数: 0

Preparation of cryolite from overhaul slag by low-temperature sulfuric acid roasting and water leaching 低温硫酸焙烧-水浸法制备冰晶石

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering

Pub Date : 2025-01-10 DOI: 10.1016/j.mineng.2025.109174

Liangmin Dong , Fen Jiao , Wei Liu , Hongbin Ling

Resource disposal of overhaul slag is an urgent problem in aluminum industry. This paper innovatively proposed the synthesis of cryolite by low temperature H₂SO₄ roasting and water leaching process. Low temperature H₂SO₄ roasting can effectively volatilize fluoride such as Na₃AlF₆, CaF₂ and NaF into the flue gas in the form of HF for recovery, and aluminum compounds (Al₂O₃, Na₃AlF₆) are converted into NaAl(SO₄)₂ (except corundum). The water leaching can effectively extraction the aluminum and sodium compounds from the roasting clinker into the solution. Under the optimal roasting and leaching conditions, the volatilization rate of fluorine, the leaching rate of aluminum and sodium were 99.21 %, 73.95 % and 95.01 %, respectively. Then, the purified HF is passed into the solution to synthesize cryolite. The recovery and grade of cryolite were 98.69 % and 99.34 %, respectively. The technique opens up a new way for the resource disposal of hazardous waste of electrolytic aluminum.

大修渣资源化处理是铝工业亟待解决的问题。创新性地提出了低温硫酸焙烧-水浸法制备冰晶石的工艺。低温H2SO4焙烧能有效地将Na3AlF6、CaF2、NaF等氟化物以HF的形式挥发到烟气中回收，铝化合物（Al2O3、Na3AlF6）转化为NaAl(SO4)2（刚玉除外）。水浸可以有效地将焙烧熟料中的铝和钠化合物萃取到溶液中。在最佳焙烧浸出条件下，氟挥发率为99.21%，铝浸出率为73.95%，钠浸出率为95.01%。然后，将纯化的HF传递到溶液中合成冰晶石。冰晶石的回收率为98.69%，品位为99.34%。该技术为电解铝危险废弃物资源化处理开辟了一条新的途径。

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引用次数: 0