International Conference on Raw Materials and Circular Economy最新文献

Assessment of Magnesia Refractories Corrosion by Iron-Rich Slags 富铁渣对镁耐火材料腐蚀的评价

International Conference on Raw Materials and Circular Economy Pub Date : 2022-08-18 DOI: 10.3390/materproc2021005135

Konstantinos Betsis, A. Kourtis, K. Karalis, A. Xenidis

引用次数: 0

Development of STEM Educational Application with Easy Java Simulation in Mining & Metallurgical Engineering—Case Study on Mineral Processing 用Easy Java模拟开发采矿冶金工程中的STEM教学应用——以矿物加工为例

International Conference on Raw Materials and Circular Economy Pub Date : 2022-07-26 DOI: 10.3390/materproc2021005134

K. Syrmakezis, K. Tsakalakis, Sarantos Psycharis

引用次数: 0

Reduction of Ferric Iron in Hydrometallurgical Solutions Using Zero-Valent Iron 用零价铁还原湿法冶金溶液中的三铁

International Conference on Raw Materials and Circular Economy Pub Date : 2022-06-16 DOI: 10.3390/materproc2021005133

C. Mystrioti, N. Papassiopi, A. Xenidis

引用次数: 0

Upgrading of a Tailings Management Facility for the Disposal of Dry Stack Tailings 处理干堆尾矿的尾矿管理设施的升级改造

International Conference on Raw Materials and Circular Economy Pub Date : 2022-06-06 DOI: 10.3390/materproc2021005132

D. Dimitriadis, Efstratios Zachareas, Vithleem Gazea

引用次数: 2

CO2 Sequestration Using Fly Ash from Lignite Power Plants 利用褐煤电厂的飞灰封存二氧化碳

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-27 DOI: 10.3390/materproc2021005131

K. Karalis, K. Kollias, G. Bartzas, C. Mystrioti, A. Xenidis

引用次数: 1

Antimony Extraction from Galena Concentrates 方铅矿精矿中锑的提取

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-20 DOI: 10.3390/materproc2021005130

Rafaella Aikaterini Megaloudi, A. Kourtis, Paschalis Oustadakis, E. Tzamos, D. Dimitriadis, A. Xenidis

引用次数: 0

Viable Scandium Extraction from Bauxite Residue at Pilot Scale 从铝土矿渣中提取钪的可行性研究

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-19 DOI: 10.3390/materproc2021005129

P. Davris, E. Balomenos, G. Nazari, Gomer M. Abrenica, S. Patkar, Wenjie Xu, Yiannis Karnachoritis

引用次数: 2

High Temperature Reduction of Bauxite Residue 铝土矿渣的高温还原

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-14 DOI: 10.3390/materproc2021005128

Lanjar Grahita, Z. Zulhan, T. Hidayat

{"title":"High Temperature Reduction of Bauxite Residue","authors":"Lanjar Grahita, Z. Zulhan, T. Hidayat","doi":"10.3390/materproc2021005128","DOIUrl":"https://doi.org/10.3390/materproc2021005128","url":null,"abstract":"The present study focused on investigating the high-temperature reduction of bauxite residue, also known as red mud. A series of reduction experiments on red mud was performed to investigate the influences of temperature (1400, 1450, and 1500 ◦C), reaction time (15, 30, and 60 min) and reductant addition (7 and 14% carbon). A reduction experiment using a combination of carbon and plastic in the form of linear low-density polyethylene (7% carbon and 5% LLDPE) was also tested. The experiments were carried out in a vertical tube furnace using a graphite crucible under an argon atmosphere. Phases formed after the reduction process was analyzed using a scanning electron microscope equipped with an energy dispersive spectroscopy detector. At 7% carbon addition for all reduction temperatures and times, the reduction process of red mud produced metal and slag. The metal mainly consisted of iron with main trace elements of Si, Ti, P, S, and V. The slag mainly consisted of Na2O, Al2O3, SiO2, CaO, and TiO2 components with residual iron oxide of less than 3.5 wt.%. Increasing the carbon addition to 14% at 1450 ◦C significantly increased the Si content in metal up to 19.1 wt.% and significantly decreased Na2O in slag to less than 0.1 wt.%. The experiment with 7% carbon + 5% LLDPE addition gave a similar reduction extent to the experiment with only 7% carbon addition. The combustion of the LLDPE occurred before the reduction took place, and hence the LLDPE did not significantly contribute to the reduction process.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130064406","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}

引用次数: 0

Sulphuric Acid Leaching of Spent Nickel Metal Hydride Car Batteries 废镍氢汽车电池的硫酸浸出

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-12 DOI: 10.3390/materproc2021005126

Elli Polychronopoulou, Paschalis Oustadakis, P. Tsakiridis, Konstantinos Betsis, A. Xenidis

{"title":"Sulphuric Acid Leaching of Spent Nickel Metal Hydride Car Batteries","authors":"Elli Polychronopoulou, Paschalis Oustadakis, P. Tsakiridis, Konstantinos Betsis, A. Xenidis","doi":"10.3390/materproc2021005126","DOIUrl":"https://doi.org/10.3390/materproc2021005126","url":null,"abstract":"The treatment of spent nickel metal hydride batteries (NiMHs) of Lexus vehicles to recover nickel (Ni) and cobalt (Co) as well as rare earth elements (REEs) including La, Ce, Nd and Y was investigated. Co-extraction of Al, Fe, Cr and Cu has also been examined. Following batteries’ manual dismantling to remove metallic cases, outer plastics and current collectors, the remaining parts including cathodes of black coloured nickel (oxy)hydroxides, anodes consisting of a nickelcontaining alloy (AB5 mischmetal type), and separators were simultaneously ground down to −5 mm using a hammer mill equipped with sieves. The fine (−1 mm) fraction of this product was further subjected to sulphuric acid leaching to recover the high-value elements contained. Acid consumption of 14 mol H2SO4 per kg of this fraction was found to be sufficient to decrease pH to less than 1. Leaching experiments were performed using 0.5, 1 and 2 M sulphuric acid solution at 5% pulp density and temperature 50, 75 or 95 ◦C. The optimum conditions for the extraction of all elements were 2M H2SO4 concentration and temperature of 75 ◦C with the exception of Ni extraction, which reached its highest value at 95 ◦C and 2M H2SO4 concentration. Extractions of 93.34% of Ni, 99.03% of Co and 100% of REEs were achieved at these conditions.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132758755","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}

引用次数: 0

Towards Sustainable Inorganic Polymers: Production and Use of Alternative Activator 迈向可持续无机聚合物:替代活化剂的生产和使用

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-12 DOI: 10.3390/materproc2021005127

L. Kriskova, E. Tatsis, M. Afsar, David Delaere, Y. Pontikes

引用次数: 0