Pub Date : 2023-08-28DOI: 10.1080/25726641.2023.2249703
E. A. Agorhom, C. Owusu, Lilian Gyedu
ABSTRACT Cyanidation is the most widely used technique for gold extraction worldwide. However, its efficiency in gold extraction has decreased due to gold association with base metals such as copper. Copper is known to form different complexes with cyanide depending on the pulp pH. These Cu-CN complexes deplete the pulp of free cyanide, thereby decreasing gold leaching. The study examined the application of diethylenetriamine (DETA) in cyanidation to minimise copper ions effect on gold cyanidation. Leaching tests performed in the presence of copper ions reduced gold recovery from 93% to 15% at a copper sulphate concentration of 1% and increased cyanide consumption by 10%. The introduction of DETA (between 0.2% and 1%) however restored gold recovery back to normal as the baseline without copper ions and also enabled gold extraction at a reduced cyanide strength. Based on the study, DETA could be used during gold–copper cyanide leaching to minimise the copper ion effect and enhance gold extraction.
{"title":"Dissolution of gold in the presence of copper ion and diethylenetriamine (DETA)","authors":"E. A. Agorhom, C. Owusu, Lilian Gyedu","doi":"10.1080/25726641.2023.2249703","DOIUrl":"https://doi.org/10.1080/25726641.2023.2249703","url":null,"abstract":"ABSTRACT Cyanidation is the most widely used technique for gold extraction worldwide. However, its efficiency in gold extraction has decreased due to gold association with base metals such as copper. Copper is known to form different complexes with cyanide depending on the pulp pH. These Cu-CN complexes deplete the pulp of free cyanide, thereby decreasing gold leaching. The study examined the application of diethylenetriamine (DETA) in cyanidation to minimise copper ions effect on gold cyanidation. Leaching tests performed in the presence of copper ions reduced gold recovery from 93% to 15% at a copper sulphate concentration of 1% and increased cyanide consumption by 10%. The introduction of DETA (between 0.2% and 1%) however restored gold recovery back to normal as the baseline without copper ions and also enabled gold extraction at a reduced cyanide strength. Based on the study, DETA could be used during gold–copper cyanide leaching to minimise the copper ion effect and enhance gold extraction.","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":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49131675","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 : 2023-08-07DOI: 10.1080/25726641.2023.2243198
Chunlei Guo, Shaochun Hou, Hailong Jin, Weiwei Wang
ABSTRACT Fluorite, a strategic industrial mineral, was investigated for flotation separation from bastnaesite with tannic acid (TA) as depressant. In this study, the adsorption analysis indicates that the adsorption density of TA on bastnaesite was greater than that of fluorite. The zeta potential, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) provide the evidence that chemisorption and electrostatic attraction occurred simultaneously between TA and fluorite or bastnaesite at optimal pH, the latter also involving hydrogen bonding interactions. Furthermore, the micro-flotation and batch flotation results suggest that TA could effectively depress bastnaesite with a negligible effect on fluorite at low concentrations, and that TA attached to the surface of bastnaesite precluded the adsorption of phthalic acid (PA) as collector, whereas it could be adsorbed on the fluorite surface. These findings offer a robust theoretical foundation and valid guidance for the flotation separation of fluorite from bastnaesite in industrial processes.
{"title":"Adsorption of tannic acid as depressant in the flotation separation of fluorite and bastnaesite","authors":"Chunlei Guo, Shaochun Hou, Hailong Jin, Weiwei Wang","doi":"10.1080/25726641.2023.2243198","DOIUrl":"https://doi.org/10.1080/25726641.2023.2243198","url":null,"abstract":"ABSTRACT\u0000 Fluorite, a strategic industrial mineral, was investigated for flotation separation from bastnaesite with tannic acid (TA) as depressant. In this study, the adsorption analysis indicates that the adsorption density of TA on bastnaesite was greater than that of fluorite. The zeta potential, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) provide the evidence that chemisorption and electrostatic attraction occurred simultaneously between TA and fluorite or bastnaesite at optimal pH, the latter also involving hydrogen bonding interactions. Furthermore, the micro-flotation and batch flotation results suggest that TA could effectively depress bastnaesite with a negligible effect on fluorite at low concentrations, and that TA attached to the surface of bastnaesite precluded the adsorption of phthalic acid (PA) as collector, whereas it could be adsorbed on the fluorite surface. These findings offer a robust theoretical foundation and valid guidance for the flotation separation of fluorite from bastnaesite in industrial processes.","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":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45793229","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 : 2023-06-17DOI: 10.1080/25726641.2023.2222909
M. Peterson, R. Karadkal, V. Nunna, S. Hapugoda, P. Austin
ABSTRACT Sighter Induced Roll Magnetic Separation tests were conducted on a ferromanganese ore sample to determine the potential to significantly upgrade the Mn content and Mn:Fe ratio. The sample had a Mn:Fe ratio of 1.3 and was comprised of hematite, cryptomelane, pyrolusite, quartz, goethite and braunite. Tests at 4.7, 2.3 and 1 mm top sizes revealed better separation of Fe from Mn at the 2.3 and 1 mm top sizes. This reflected the better liberation and separation characteristics of Fe oxides at 2.3 mm and both Fe and Mn oxides at 1 mm. A test on the −2.3 + 0.6 mm size fraction improved the Mn:Fe ratio to 4.6, the Mn content to 41.5 wt% with 69.4% mass recovery and 84.2% Mn recovery. Particle magnetic susceptibility was influenced by particle microporosity, and its effect on apparent density, resulting in some Mn oxides reporting to the magnetic concentrate and Fe oxides to the tails.
{"title":"Demonstration of dry magnetic separation to upgrade the Mn:Fe ratio of a ferromanganese ore sample","authors":"M. Peterson, R. Karadkal, V. Nunna, S. Hapugoda, P. Austin","doi":"10.1080/25726641.2023.2222909","DOIUrl":"https://doi.org/10.1080/25726641.2023.2222909","url":null,"abstract":"ABSTRACT Sighter Induced Roll Magnetic Separation tests were conducted on a ferromanganese ore sample to determine the potential to significantly upgrade the Mn content and Mn:Fe ratio. The sample had a Mn:Fe ratio of 1.3 and was comprised of hematite, cryptomelane, pyrolusite, quartz, goethite and braunite. Tests at 4.7, 2.3 and 1 mm top sizes revealed better separation of Fe from Mn at the 2.3 and 1 mm top sizes. This reflected the better liberation and separation characteristics of Fe oxides at 2.3 mm and both Fe and Mn oxides at 1 mm. A test on the −2.3 + 0.6 mm size fraction improved the Mn:Fe ratio to 4.6, the Mn content to 41.5 wt% with 69.4% mass recovery and 84.2% Mn recovery. Particle magnetic susceptibility was influenced by particle microporosity, and its effect on apparent density, resulting in some Mn oxides reporting to the magnetic concentrate and Fe oxides to the tails.","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":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43244622","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 : 2023-06-05DOI: 10.1080/25726641.2023.2217403
Sujit A. Jagnade, Saurabh K. Nayak, J. M. Korath, N. Viswanathan, P. Abhale
ABSTRACT Lime is an important flux used in the iron and steel-making processes. Tata Steel Jamshedpur uses a twin-shaft Parallel Flow Regenerative type kiln to calcine limestone. Previously, the kiln was operated based on the temperature measurement at only three locations. This led to suboptimal kiln performance and difficulty in maintaining lime quality. A thermal digital twin was developed using first principles to address these issues. A set of unsteady-state partial-differential equations representing the thermophysical phenomena is solved numerically using the finite volume method. The model was validated with the measured flue gas temperature and lime temperatures. The model is implemented online with the real-time operating parameters to estimate the temperature profile of solid and gas and the degree of conversion of limestone. This real-time visibility enables the operators to optimize the process and achieve lime conversion up to 94%, resulting in energy savings of 31.8 GJ/day and stable lime quality.
{"title":"A mathematical model of a twin-shaft parallel flow regenerative lime kiln","authors":"Sujit A. Jagnade, Saurabh K. Nayak, J. M. Korath, N. Viswanathan, P. Abhale","doi":"10.1080/25726641.2023.2217403","DOIUrl":"https://doi.org/10.1080/25726641.2023.2217403","url":null,"abstract":"ABSTRACT\u0000 Lime is an important flux used in the iron and steel-making processes. Tata Steel Jamshedpur uses a twin-shaft Parallel Flow Regenerative type kiln to calcine limestone. Previously, the kiln was operated based on the temperature measurement at only three locations. This led to suboptimal kiln performance and difficulty in maintaining lime quality. A thermal digital twin was developed using first principles to address these issues. A set of unsteady-state partial-differential equations representing the thermophysical phenomena is solved numerically using the finite volume method. The model was validated with the measured flue gas temperature and lime temperatures. The model is implemented online with the real-time operating parameters to estimate the temperature profile of solid and gas and the degree of conversion of limestone. This real-time visibility enables the operators to optimize the process and achieve lime conversion up to 94%, resulting in energy savings of 31.8 GJ/day and stable lime quality.","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":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41389792","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 : 2023-05-26DOI: 10.1080/25726641.2023.2216612
Daud T. Olaoluwa, A. A. Baba, A. L. Oyewole
ABSTRACT The dissolution of a Nigerian lepidolite ore in sulphuric acid solution for its optimal industrial transformation was carried out. The degree of influence of the acid concentration, reaction temperature, particle diameter, and reaction time on the rate of the ore dissolution was investigated. These parameters were observed to enhance the rate of the dissolution as the acid concentration was increased from 0.1 to 1.5 mol/L, reaction temperature from room temperature (27 ± 2°C) to 75°C, particle diameter from 63 to 90 µm and reaction time from 5 to 120 min, respectively. The ore dissolution kinetics was studied using the shrinking core model, based on which the process was found to follow a diffusion-controlled mechanism as the rate-determining step. The activation energy of 18.1 kJ/mol lends support to this assertion. At optimal conditions, the formation of a pure lepidolite crystal (K2Li3Al3Si7O21F3: (96-900-0834)), recommended as a precursor for preparing industrial lithium sulphate was obtained.
{"title":"Beneficiation of a Nigerian lepidolite ore by sulfuric acid leaching","authors":"Daud T. Olaoluwa, A. A. Baba, A. L. Oyewole","doi":"10.1080/25726641.2023.2216612","DOIUrl":"https://doi.org/10.1080/25726641.2023.2216612","url":null,"abstract":"ABSTRACT\u0000 The dissolution of a Nigerian lepidolite ore in sulphuric acid solution for its optimal industrial transformation was carried out. The degree of influence of the acid concentration, reaction temperature, particle diameter, and reaction time on the rate of the ore dissolution was investigated. These parameters were observed to enhance the rate of the dissolution as the acid concentration was increased from 0.1 to 1.5 mol/L, reaction temperature from room temperature (27 ± 2°C) to 75°C, particle diameter from 63 to 90 µm and reaction time from 5 to 120 min, respectively. The ore dissolution kinetics was studied using the shrinking core model, based on which the process was found to follow a diffusion-controlled mechanism as the rate-determining step. The activation energy of 18.1 kJ/mol lends support to this assertion. At optimal conditions, the formation of a pure lepidolite crystal (K2Li3Al3Si7O21F3: (96-900-0834)), recommended as a precursor for preparing industrial lithium sulphate was obtained.","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":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48334081","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 : 2023-05-22DOI: 10.1080/25726641.2023.2214329
Archita Mohanty, B. Marandi, N. Devi
ABSTRACT This research explored the significance of Cyphos IL 101 in recovering metal values from waste LiMn2O4 batteries. Several leaching parameters were investigated to recover metals from the leach liquor of the battery material. The maximum leaching efficiency of Li (100%) and Mn (99.6%) was attained with 3.0 mol/L hydrochloric acid, 30°C, S/L ratio of 10 g/L, and 60 min leaching duration. The leaching process was diffusion-controlled. At pH 5.5, the separation of manganese and lithium exhibited excellent selectivity towards manganese over lithium using 0.1 mol/L Cyphos IL 101. 99.6% manganese extraction and negligible lithium extraction were obtained with two stages of counter-current extraction at A/O 1:1 predicted by the McCabe-Thiele plot. Using 0.1 mol/L hydrochloric acid, a stripping efficiency of 99.4% was attained for manganese.
{"title":"Combined hydrometallurgical route for recovery of metals from spent LIB using hydrochloric acid and phosphonium ionic liquid","authors":"Archita Mohanty, B. Marandi, N. Devi","doi":"10.1080/25726641.2023.2214329","DOIUrl":"https://doi.org/10.1080/25726641.2023.2214329","url":null,"abstract":"ABSTRACT This research explored the significance of Cyphos IL 101 in recovering metal values from waste LiMn2O4 batteries. Several leaching parameters were investigated to recover metals from the leach liquor of the battery material. The maximum leaching efficiency of Li (100%) and Mn (99.6%) was attained with 3.0 mol/L hydrochloric acid, 30°C, S/L ratio of 10 g/L, and 60 min leaching duration. The leaching process was diffusion-controlled. At pH 5.5, the separation of manganese and lithium exhibited excellent selectivity towards manganese over lithium using 0.1 mol/L Cyphos IL 101. 99.6% manganese extraction and negligible lithium extraction were obtained with two stages of counter-current extraction at A/O 1:1 predicted by the McCabe-Thiele plot. Using 0.1 mol/L hydrochloric acid, a stripping efficiency of 99.4% was attained for manganese.","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":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44447661","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}
{"title":"Removal of Pb<sup>+2</sup> and Cd<sup>+2</sup> from Aqueous Solution by Using Faujasite","authors":"Fatma Mohamed Dardir, Ezzat Abdalla Ahmed, Mamdouh Farag Soliman, Mostafa Ragab Abukhadra","doi":"10.11648/j.ijmpem.20230801.11","DOIUrl":"https://doi.org/10.11648/j.ijmpem.20230801.11","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":"2023-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73096656","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 : 2023-04-03DOI: 10.1080/25726641.2023.2202004
S. Wright, Shouyi Sun, S. Jahanshahi
ABSTRACT New lead volatilisation rate and activity data in copper mattes containing low levels of Pb were determined through high-temperature experiments. Measurements on volatilisation rate of lead from mattes (Cu-Fe-S) were carried out at temperatures from 1200 to 1570°C by injection of nitrogen into shallow baths. The concentration of lead in the melts covered a range of 200–6 mg.kg−1. The rate data exhibited first order behaviour with respect to concentration of Pb. The deduced vapour pressure of Pb in the gas was found to be dependent on the concentration of the Pb in melts and in accord with the equilibrium data on mattes at similar temperatures. Increasing temperature had a strong influence on volatilisation rate and total partial pressure of Pb in the gas phase. Matte grade (45–83 wt%) does not have a strong influence on volatilisation rate, but increasing sulphur potential does have a marked impact in supressing the volatilisation rate.
{"title":"Rate of removal of lead from copper matte by submerged gas injection","authors":"S. Wright, Shouyi Sun, S. Jahanshahi","doi":"10.1080/25726641.2023.2202004","DOIUrl":"https://doi.org/10.1080/25726641.2023.2202004","url":null,"abstract":"ABSTRACT New lead volatilisation rate and activity data in copper mattes containing low levels of Pb were determined through high-temperature experiments. Measurements on volatilisation rate of lead from mattes (Cu-Fe-S) were carried out at temperatures from 1200 to 1570°C by injection of nitrogen into shallow baths. The concentration of lead in the melts covered a range of 200–6 mg.kg−1. The rate data exhibited first order behaviour with respect to concentration of Pb. The deduced vapour pressure of Pb in the gas was found to be dependent on the concentration of the Pb in melts and in accord with the equilibrium data on mattes at similar temperatures. Increasing temperature had a strong influence on volatilisation rate and total partial pressure of Pb in the gas phase. Matte grade (45–83 wt%) does not have a strong influence on volatilisation rate, but increasing sulphur potential does have a marked impact in supressing the volatilisation rate.","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":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43449840","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 : 2023-04-03DOI: 10.1080/25726641.2023.2202011
José Hernández, Jaime M. Tapia
ABSTRACT This study shows the feasibility of recovering copper directly from Pregnant Leaching Solutions (PLS), using the reactive electrodialysis technique, without the need of solvent extraction. The copper PLS contained the following ion concentrations: Cu2+ 2.0–2.5 g/L; pH 1.5–1.8; 90–95 g/L; Cl− 8–10 g/L and total iron of 8–10 g/L. The copper electrowinning process is limited by the mass transport capacity of the system and by impurities that decrease the yield. To increase the selectivity and the copperproduction rate, a reactive electrodialysis (RED) cell was developed. The cell contained four compartments, two anion-exchangemembranes and a bipolar electrode to increase the production rate. This cell recovered copper and sulfuric acid at the anolytes. Thebest result was a current efficiency of 99% and specific energy consumption of 2.11 Wh/kg Cu using a current density of 80 A/m2 at 55°C and flow of 100 mL/s.
{"title":"Direct copper recovery from pregnant leaching solutions (PLS), using a custom electrolytic cell, based on reactive electrodialysis (RED)","authors":"José Hernández, Jaime M. Tapia","doi":"10.1080/25726641.2023.2202011","DOIUrl":"https://doi.org/10.1080/25726641.2023.2202011","url":null,"abstract":"ABSTRACT This study shows the feasibility of recovering copper directly from Pregnant Leaching Solutions (PLS), using the reactive electrodialysis technique, without the need of solvent extraction. The copper PLS contained the following ion concentrations: Cu2+ 2.0–2.5 g/L; pH 1.5–1.8; 90–95 g/L; Cl− 8–10 g/L and total iron of 8–10 g/L. The copper electrowinning process is limited by the mass transport capacity of the system and by impurities that decrease the yield. To increase the selectivity and the copperproduction rate, a reactive electrodialysis (RED) cell was developed. The cell contained four compartments, two anion-exchangemembranes and a bipolar electrode to increase the production rate. This cell recovered copper and sulfuric acid at the anolytes. Thebest result was a current efficiency of 99% and specific energy consumption of 2.11 Wh/kg Cu using a current density of 80 A/m2 at 55°C and flow of 100 mL/s.","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":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48986214","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 : 2023-04-03DOI: 10.1080/25726641.2023.2214327
Ryoji Sanekata, T. Nagai
ABSTRACT Platinum and palladium are platinum group metals (PGMs) used in automotive catalysts. Recycling PGMs is necessary because of their low production volumes. Recycling of Pt and Pd, there is a need to develop effective methods for recovering Pt and Pd from metal based automotive catalysts and methods for acid dissolution of Pt and Pd that do not require strong oxidant. Recently, it has been shown that PGMs can be made into complex oxides, which can be dissolved in HCl without oxidant. In this study, we investigated the formation conditions of complex oxides of Pt, Pd and PbO, and their solubility in HCl. As a result, PbPt2O4 was prepared at 873–973 K, Pb2PtO4 at 873–973 K, and PbPdO2 at 773–1073 K. These complex oxides exhibited high solubility in HCl without oxidant. There were differences in solubility in Pt and Pd complex oxides.
{"title":"Formation of Pt and Pd complex oxides using lead oxide and their solubility in hydrochloric acid","authors":"Ryoji Sanekata, T. Nagai","doi":"10.1080/25726641.2023.2214327","DOIUrl":"https://doi.org/10.1080/25726641.2023.2214327","url":null,"abstract":"ABSTRACT Platinum and palladium are platinum group metals (PGMs) used in automotive catalysts. Recycling PGMs is necessary because of their low production volumes. Recycling of Pt and Pd, there is a need to develop effective methods for recovering Pt and Pd from metal based automotive catalysts and methods for acid dissolution of Pt and Pd that do not require strong oxidant. Recently, it has been shown that PGMs can be made into complex oxides, which can be dissolved in HCl without oxidant. In this study, we investigated the formation conditions of complex oxides of Pt, Pd and PbO, and their solubility in HCl. As a result, PbPt2O4 was prepared at 873–973 K, Pb2PtO4 at 873–973 K, and PbPdO2 at 773–1073 K. These complex oxides exhibited high solubility in HCl without oxidant. There were differences in solubility in Pt and Pd complex oxides.","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":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44298494","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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