Pub Date : 2023-02-14DOI: 10.1080/25726641.2023.2177243
Shaila Mir, N. Dhawan
ABSTRACT The generation of electronic waste generation has led to significant attention towards metal recovery from urban sources. Due to scarcity, finite resources, and geopolitical constraints, tantalum recycling from capacitors is essential. In this study, sequential separation involving the removal of tightly bound epoxy resin and metallic impurities is carried out. Pyrolysis as a pre-treatment and its response on phase transformation, resin decomposition and metal enrichment are investigated. Pyrolysis effectively liberates the tantalum–rich sintered core from outer resin which is followed by mild organic acid leaching. The manganese impurity was removed from the core to obtain Ta recovery of ∼94.8% with ∼96% purity in the leach residue. The separated resin component was subjected to conventional sink-float separation for the recovery of metallic values (silver, tantalum). It is found that 100 g (666 units) of Ta capacitors can yield 34 g of Ta, equivalent to 0.28 tons of primary ore.
{"title":"Recycling of metallic values from discarded tantalum capacitors","authors":"Shaila Mir, N. Dhawan","doi":"10.1080/25726641.2023.2177243","DOIUrl":"https://doi.org/10.1080/25726641.2023.2177243","url":null,"abstract":"ABSTRACT The generation of electronic waste generation has led to significant attention towards metal recovery from urban sources. Due to scarcity, finite resources, and geopolitical constraints, tantalum recycling from capacitors is essential. In this study, sequential separation involving the removal of tightly bound epoxy resin and metallic impurities is carried out. Pyrolysis as a pre-treatment and its response on phase transformation, resin decomposition and metal enrichment are investigated. Pyrolysis effectively liberates the tantalum–rich sintered core from outer resin which is followed by mild organic acid leaching. The manganese impurity was removed from the core to obtain Ta recovery of ∼94.8% with ∼96% purity in the leach residue. The separated resin component was subjected to conventional sink-float separation for the recovery of metallic values (silver, tantalum). It is found that 100 g (666 units) of Ta capacitors can yield 34 g of Ta, equivalent to 0.28 tons of primary ore.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41604907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-04DOI: 10.11648/j.ijmpem.20220704.11
J. Shehu, Usman Defyan Alhassan, Abdulwaheed Adewuyi Rafiu, A. Idris-Nda, A. Alkali
: Soil samples were analysed to determine the heavy metals (pH, Cd, Zn, Ar, Cr, Cu, Pb, Hg, Fe and Ni) at Kataeregi mining site, Niger State, Nigeria. Ten soil samples were collected from four soil pits and control site were collected 100 m away from mining site. The results of the analysed soil samples are as follows: Soil pH values of various locations ranged from 6.08 to 8.12 which is indicative of moderately alkaline, Ar values ranged from 4.23 mg/kg to 12.05 mg/kg, Ni values ranged between 4.00 mg/kg and 70.0 mg/kg and is above the standard set for agricultural and human health, Fe ranged from 0.72 mg/kg to 16.03 mg/kg, Hg values ranged between 0.11 and 1.01, Cd values ranged from 4.76 mg/kg to 9.32 mg/kg which is indicative of high concentration of chemical parameters and Cr ranged between 9.89 mg/kg and 27.00 mg/kg. Cu values ranged from 99.78 mg/kg to 111.9 mg/kg while Pb values ranged between 1.0 mg/kg and 6.07 mg/kg and Zn values ranged from 9.91 mg/kg to 13.0 mg/kg. It is observed that concentrations of Ar, Ni, Hg, Cd and Cr are above the CSQG standard while that of Fe is found to be below the standard set by CSQG & WHO and Cu, Pb, and Zn are within the permissible range.
{"title":"Assessment of Physiochemical Qualities of Soil at Kataeregi Mining Site, Niger State, Nigeria","authors":"J. Shehu, Usman Defyan Alhassan, Abdulwaheed Adewuyi Rafiu, A. Idris-Nda, A. Alkali","doi":"10.11648/j.ijmpem.20220704.11","DOIUrl":"https://doi.org/10.11648/j.ijmpem.20220704.11","url":null,"abstract":": Soil samples were analysed to determine the heavy metals (pH, Cd, Zn, Ar, Cr, Cu, Pb, Hg, Fe and Ni) at Kataeregi mining site, Niger State, Nigeria. Ten soil samples were collected from four soil pits and control site were collected 100 m away from mining site. The results of the analysed soil samples are as follows: Soil pH values of various locations ranged from 6.08 to 8.12 which is indicative of moderately alkaline, Ar values ranged from 4.23 mg/kg to 12.05 mg/kg, Ni values ranged between 4.00 mg/kg and 70.0 mg/kg and is above the standard set for agricultural and human health, Fe ranged from 0.72 mg/kg to 16.03 mg/kg, Hg values ranged between 0.11 and 1.01, Cd values ranged from 4.76 mg/kg to 9.32 mg/kg which is indicative of high concentration of chemical parameters and Cr ranged between 9.89 mg/kg and 27.00 mg/kg. Cu values ranged from 99.78 mg/kg to 111.9 mg/kg while Pb values ranged between 1.0 mg/kg and 6.07 mg/kg and Zn values ranged from 9.91 mg/kg to 13.0 mg/kg. It is observed that concentrations of Ar, Ni, Hg, Cd and Cr are above the CSQG standard while that of Fe is found to be below the standard set by CSQG & WHO and Cu, Pb, and Zn are within the permissible range.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73324088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-04DOI: 10.11648/j.ijmpem.20220704.12
Walaa Ali Hassan, Mohamed Abdel-Moneim Mohamed, Ezzat Abdalla Ahmed, Mohamed Said Shaban, Mostafa Ragab Abukhadra
{"title":"Removal of Fe<sup>2+</sup> and Mn<sup>2+</sup> from Water by Using Mining Rock Wastes and Their Synthesized Zeolites","authors":"Walaa Ali Hassan, Mohamed Abdel-Moneim Mohamed, Ezzat Abdalla Ahmed, Mohamed Said Shaban, Mostafa Ragab Abukhadra","doi":"10.11648/j.ijmpem.20220704.12","DOIUrl":"https://doi.org/10.11648/j.ijmpem.20220704.12","url":null,"abstract":"","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87587328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-28DOI: 10.1080/25726641.2023.2165292
Michael Peterson
ABSTRACT This study utilised Vickers and Knoop microindentation testing to characterise the physical and chemical properties of a range of iron ore material types and lump ore samples. Lump ore composite microhardness (CH) and fracture toughness (CFT) correlated best with Tumble and Abrasion Indices and with Fe-total, Al2O3 and LOI contents. General trends were evident between CH/CFT and other common metallurgical indices, e.g. higher Reduction Degradation Index with lower CH. Correlations between ore group CH/CFT and the metallurgical data were generally similar, but relatively stronger, than those for the lump ores. The chemistry of mineralogical-textural sub-sets of ore groups correlated with lump ore CH/CFT. Calculating ore group CH/CFT using a textural method is therefore capable of capturing differences in ore group chemistry that relate in part to texture. A textural database of microhardness and fracture toughness can be utilised with automated optical image analysis to provide geometallurgical characterisation of iron ores.
{"title":"Microindentation testing as a means of predicting lump iron ore physical properties","authors":"Michael Peterson","doi":"10.1080/25726641.2023.2165292","DOIUrl":"https://doi.org/10.1080/25726641.2023.2165292","url":null,"abstract":"ABSTRACT This study utilised Vickers and Knoop microindentation testing to characterise the physical and chemical properties of a range of iron ore material types and lump ore samples. Lump ore composite microhardness (CH) and fracture toughness (CFT) correlated best with Tumble and Abrasion Indices and with Fe-total, Al2O3 and LOI contents. General trends were evident between CH/CFT and other common metallurgical indices, e.g. higher Reduction Degradation Index with lower CH. Correlations between ore group CH/CFT and the metallurgical data were generally similar, but relatively stronger, than those for the lump ores. The chemistry of mineralogical-textural sub-sets of ore groups correlated with lump ore CH/CFT. Calculating ore group CH/CFT using a textural method is therefore capable of capturing differences in ore group chemistry that relate in part to texture. A textural database of microhardness and fracture toughness can be utilised with automated optical image analysis to provide geometallurgical characterisation of iron ores.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47685729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1007/978-3-031-22765-3
{"title":"New Directions in Mineral Processing, Extractive Metallurgy, Recycling and Waste Minimization: An EPD Symposium in Honor of Patrick R. Taylor","authors":"","doi":"10.1007/978-3-031-22765-3","DOIUrl":"https://doi.org/10.1007/978-3-031-22765-3","url":null,"abstract":"","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86953130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-28DOI: 10.1080/25726641.2022.2161736
H. Ali, M. El-Sadek, H. Ahmed
ABSTRACT The transformations of low-grade manganese ore were investigated during roasting in the air at different temperatures up to 1200°C. The transformations were followed up by XRD and TGA-DTA. Moreover, the morphology and magnetic properties were determined by SEM and VSM. It was observed that MnO2 transformed to the lower oxide Mn5O8 at 500°C and then to bixbyite (Mn2O3) at 600°C. Finally, the bixbyite decomposed to hausmannite (Mn3O4) at 800°C. Increasing the roasting temperature to 900°C induced a reaction between hematite and hausmannite and led to the formation of a small amount of solid solution of the ferrite spinel MnFe2O4. Further increase in temperature to 1000°C led to the formation of a solid solution of braunite (Mn7SiO12) which decomposed to rhodonite (MnSiO3) at 1200°C. The magnetic susceptibility of the original ore gradually increased with the roasting temperature, from 0.119 × 10−3 at ambient temperature to a maximum value of 80 × 10−3 at 1200°C.
{"title":"Investigation of transformations of low-grade manganese ore during the roasting process","authors":"H. Ali, M. El-Sadek, H. Ahmed","doi":"10.1080/25726641.2022.2161736","DOIUrl":"https://doi.org/10.1080/25726641.2022.2161736","url":null,"abstract":"ABSTRACT The transformations of low-grade manganese ore were investigated during roasting in the air at different temperatures up to 1200°C. The transformations were followed up by XRD and TGA-DTA. Moreover, the morphology and magnetic properties were determined by SEM and VSM. It was observed that MnO2 transformed to the lower oxide Mn5O8 at 500°C and then to bixbyite (Mn2O3) at 600°C. Finally, the bixbyite decomposed to hausmannite (Mn3O4) at 800°C. Increasing the roasting temperature to 900°C induced a reaction between hematite and hausmannite and led to the formation of a small amount of solid solution of the ferrite spinel MnFe2O4. Further increase in temperature to 1000°C led to the formation of a solid solution of braunite (Mn7SiO12) which decomposed to rhodonite (MnSiO3) at 1200°C. The magnetic susceptibility of the original ore gradually increased with the roasting temperature, from 0.119 × 10−3 at ambient temperature to a maximum value of 80 × 10−3 at 1200°C.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49266244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-28DOI: 10.1080/25726641.2022.2160081
S. Nirmal Kumar, B. Desai, V. Tathavadkar, Yogesh Patel, Jayesh Patel, Anil Singh, Ka Vakil, Sokkuraj Kanakanand
ABSTRACT Flash smelting furnace (FSF) technology by Outokumpu is one of the most widely employed methods for copper smelting. Developing an understanding of the impact of the process parameters on smelting operation through modelling is the key to improve the smelting efficiency. Though several numerical approaches for modelling the FSF have been reported, this paper focuses on a detailed approach of computational fluid dynamics (CFD) modelling which overcomes the limitations of the earlier models by incorporating feed mineralogy and smelting reaction kinetics. The FSF based at Birla Copper, Dahej was modelled considering the reaction shaft and settler freeboard as the domain, where most of the gas-solid phase reactions occur. This model provides an exhaustive information on the FSF operation which aids in visualizing the phenomena occurring inside the furnace. A parametric study was done to validate and demonstrate the impact of various process parameters on smelting.
Outokumpu公司的闪速熔炼炉(FSF)技术是目前应用最广泛的铜冶炼方法之一。通过建模来了解工艺参数对冶炼操作的影响是提高冶炼效率的关键。虽然已经报道了几种模拟FSF的数值方法，但本文重点介绍了计算流体动力学(CFD)建模的详细方法，该方法通过结合进料矿物学和冶炼反应动力学克服了早期模型的局限性。在Dahej Birla Copper的FSF模型中，考虑了反应轴和沉降器干舷作为主要发生气固相反应的区域。该模型提供了FSF操作的详尽信息，有助于可视化炉内发生的现象。进行了参数化研究，验证和论证了各工艺参数对冶炼的影响。
{"title":"CFD modelling of copper flash smelting furnace – reaction shaft","authors":"S. Nirmal Kumar, B. Desai, V. Tathavadkar, Yogesh Patel, Jayesh Patel, Anil Singh, Ka Vakil, Sokkuraj Kanakanand","doi":"10.1080/25726641.2022.2160081","DOIUrl":"https://doi.org/10.1080/25726641.2022.2160081","url":null,"abstract":"ABSTRACT Flash smelting furnace (FSF) technology by Outokumpu is one of the most widely employed methods for copper smelting. Developing an understanding of the impact of the process parameters on smelting operation through modelling is the key to improve the smelting efficiency. Though several numerical approaches for modelling the FSF have been reported, this paper focuses on a detailed approach of computational fluid dynamics (CFD) modelling which overcomes the limitations of the earlier models by incorporating feed mineralogy and smelting reaction kinetics. The FSF based at Birla Copper, Dahej was modelled considering the reaction shaft and settler freeboard as the domain, where most of the gas-solid phase reactions occur. This model provides an exhaustive information on the FSF operation which aids in visualizing the phenomena occurring inside the furnace. A parametric study was done to validate and demonstrate the impact of various process parameters on smelting.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44033170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-07DOI: 10.1080/25726641.2022.2153484
Jean Jacques Kalombo Mbayo, H. Simonsen, S. Ndlovu
ABSTRACT The cyanidation process for refractory gold ores has been the subject of numerous investigations aimed at improving gold recovery and leaching kinetics. From recent literature investigations, hydrodynamic cavitation has been found to be a promising new approach which may modify the cyanidation processes. In this study, this approach results in the enhancement of mass transfer kinetics in multiphase fluid streams due to impacting two pulps streams against one another in a vessel called the Jetleach reactor. In this work, the Jetleach reactor was applied to a flotation concentrate from a South African gold tailings processing plant (Ergo) where an improvement of almost 10% in gold recovery was obtained while decreasing cyanide and oxygen consumption by almost 8% and 50%, respectively. The main reason for the improvement is surmised to be due to the generation of micro-cavitation which improves the mass transfer of oxygen and cyanide within the slurry.
{"title":"Use of cavitation to enhance the leaching kinetics of refractory gold ores","authors":"Jean Jacques Kalombo Mbayo, H. Simonsen, S. Ndlovu","doi":"10.1080/25726641.2022.2153484","DOIUrl":"https://doi.org/10.1080/25726641.2022.2153484","url":null,"abstract":"ABSTRACT The cyanidation process for refractory gold ores has been the subject of numerous investigations aimed at improving gold recovery and leaching kinetics. From recent literature investigations, hydrodynamic cavitation has been found to be a promising new approach which may modify the cyanidation processes. In this study, this approach results in the enhancement of mass transfer kinetics in multiphase fluid streams due to impacting two pulps streams against one another in a vessel called the Jetleach reactor. In this work, the Jetleach reactor was applied to a flotation concentrate from a South African gold tailings processing plant (Ergo) where an improvement of almost 10% in gold recovery was obtained while decreasing cyanide and oxygen consumption by almost 8% and 50%, respectively. The main reason for the improvement is surmised to be due to the generation of micro-cavitation which improves the mass transfer of oxygen and cyanide within the slurry.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47589756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-08DOI: 10.1080/25726641.2022.2130522
M. Peterson, S. Hapugoda, J. Manuel
ABSTRACT Fe-Mn spinels are common bonding phases in ferromanganese sinter and play an important role in determining sinter strength. This study analysed spinel phases from ferromanganese sinter to determine the range of compositions present and examine the relationship between phase composition and microhardness. Spinels with α-vredenburgite and jacobsite compositions had notably increased mean Al content compared to that of end-member Fe- or Mn-spinels. There was a strong negative correlation between the Fe+Al content and the Mn/Fe ratio of sinter jacobsite and of α-vredenburgite, indicating the likely substitution of Al3+ for Mn3+ in the vredenburgite structure. Mixed Fe-Mn spinels had higher Vickers and Knoop microhardness and fracture toughness than end-member Fe- or Mn-spinels. It is likely that the presence of Al in the octahedral site in the α-vredenburgite structure is related to the increased microhardness and, therefore, should have a positive effect on sinter strength if vredenburgite is present in sufficient quantities.
{"title":"Microhardness-compositional relationship of Fe3O4-Mn3O4 series spinels from ferromanganese sinter and its relationship to sinter strength","authors":"M. Peterson, S. Hapugoda, J. Manuel","doi":"10.1080/25726641.2022.2130522","DOIUrl":"https://doi.org/10.1080/25726641.2022.2130522","url":null,"abstract":"ABSTRACT Fe-Mn spinels are common bonding phases in ferromanganese sinter and play an important role in determining sinter strength. This study analysed spinel phases from ferromanganese sinter to determine the range of compositions present and examine the relationship between phase composition and microhardness. Spinels with α-vredenburgite and jacobsite compositions had notably increased mean Al content compared to that of end-member Fe- or Mn-spinels. There was a strong negative correlation between the Fe+Al content and the Mn/Fe ratio of sinter jacobsite and of α-vredenburgite, indicating the likely substitution of Al3+ for Mn3+ in the vredenburgite structure. Mixed Fe-Mn spinels had higher Vickers and Knoop microhardness and fracture toughness than end-member Fe- or Mn-spinels. It is likely that the presence of Al in the octahedral site in the α-vredenburgite structure is related to the increased microhardness and, therefore, should have a positive effect on sinter strength if vredenburgite is present in sufficient quantities.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42768384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-30DOI: 10.1080/25726641.2022.2116363
Mohammad Hasan Golpayegani, B. Rezai
ABSTRACT This paper investigates grinding media's dynamic voidage to improve the Morrell-C model's accuracy in predicting the ball mills' power draw. Using a three-level factorial design, we provided an empirical model to determine the voidage of each ball size distribution proposed by Bond for ball mills' first filling in various ranges of fractional mill filling and mill rotating speed. Moreover, by employing the multiple regression method, a general model was developed to predict the balls' dynamic voidage by calculating the mean absolute deviation (MAD) of the balls' diameter. Results revealed that the balls' dynamic voidage increases with increasing the rotating speed and decreasing the fractional filling and MAD of the balls' diameter. The evaluation of the grinding media's voidage prediction models' performance in improving the Morrell-C model's accuracy indicated an increase in the model's predictive power by calculating the ball mills' load bulk density based on the dynamic voidage of grinding media.
{"title":"Improving the Morrell C-model's accuracy in predicting the ball mills’ power draw based on calculating the dynamic voidage of grinding media","authors":"Mohammad Hasan Golpayegani, B. Rezai","doi":"10.1080/25726641.2022.2116363","DOIUrl":"https://doi.org/10.1080/25726641.2022.2116363","url":null,"abstract":"ABSTRACT This paper investigates grinding media's dynamic voidage to improve the Morrell-C model's accuracy in predicting the ball mills' power draw. Using a three-level factorial design, we provided an empirical model to determine the voidage of each ball size distribution proposed by Bond for ball mills' first filling in various ranges of fractional mill filling and mill rotating speed. Moreover, by employing the multiple regression method, a general model was developed to predict the balls' dynamic voidage by calculating the mean absolute deviation (MAD) of the balls' diameter. Results revealed that the balls' dynamic voidage increases with increasing the rotating speed and decreasing the fractional filling and MAD of the balls' diameter. The evaluation of the grinding media's voidage prediction models' performance in improving the Morrell-C model's accuracy indicated an increase in the model's predictive power by calculating the ball mills' load bulk density based on the dynamic voidage of grinding media.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42037143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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