International Conference on Raw Materials and Circular Economy最新文献_第2页

Performance of Fe-Rich Alkali-Activated Materials in Na2SO4 Solution: Role of MgO/(MgO + CaO) in the Slag 富铁碱活化材料在Na2SO4溶液中的性能:MgO/(MgO + CaO)在炉渣中的作用

International Conference on Raw Materials and Circular Economy Pub Date : 2022-04-02 DOI: 10.3390/materproc2021005125

N. Wen, A. Peys, T. Hertel, Y. Pontikes

引用次数: 1

Formulation of Bogue Equations from Thermodynamic Modelling for Low-Carbon Dioxide Ferrite-Belite Clinkers 二氧化碳铁氧体-白铁矿熟料热力学模型中的Bogue方程

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-31 DOI: 10.3390/materproc2021005124

Rahul Roy, T. Hertel, Y. Pontikes

{"title":"Formulation of Bogue Equations from Thermodynamic Modelling for Low-Carbon Dioxide Ferrite-Belite Clinkers","authors":"Rahul Roy, T. Hertel, Y. Pontikes","doi":"10.3390/materproc2021005124","DOIUrl":"https://doi.org/10.3390/materproc2021005124","url":null,"abstract":"In this study, limestone (LS), kaolin (K) and bauxite residue (BR) were considered as potential raw meal ingredients for the preparation of ferrite-belite (cement) clinkers. A forecast of the mineralogical composition for the different clinker composition, based on the major oxides, i.e., CaO (C), SiO2 (S), Al2O3 (A) and Fe2O3 (F) was obtained using thermodynamic modelling (FactSage). A phase field schematic representation was established for the three-component raw meal. The data obtained therein were used to compute the Bogue equations for the ferrite-belite cements. Based on this assumption, i.e., only four simultaneous linear equations each containing four different variables (crystalline phases) were used to formulate Bogue type equations. It was established that with increasing LS content from 33 wt% to 64 wt% and BR content decreasing from 66 wt% to 35 wt%, CF was only present at an LS content between 33–47%, followed by gehlenite up to LS content of 53% and rankinite at a LS content of about 55 wt%. Moreover, C3A and lime were present in place of gehlenite and rankinite beyond LS content of 55 wt%. However, the belite and ferrite phases remained present throughout the entire clinker composition. Overall, this study provides the basic understanding required for the development of low carbon ferrite-belite clinkers.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122996429","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

Investigation of Magnetic Separation and Thermal Treatment Effects, Combined with Additives (Mineral Oxides), on Serpentinized Peridotites from the Gerakini (Chalkidiki, N. Greece) Magnesite Mine 希腊Gerakini (Chalkidiki, N. Greece)菱镁矿中蛇纹石橄榄岩的磁选和热处理效果及添加剂(矿物氧化物)研究

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-23 DOI: 10.3390/materproc2021005123

Dimitra Papargyriou, E. Tzamos, Andreas Kasinos, Polykarpos Papageorgiou, M. Mitrakas, A. Zouboulis

{"title":"Investigation of Magnetic Separation and Thermal Treatment Effects, Combined with Additives (Mineral Oxides), on Serpentinized Peridotites from the Gerakini (Chalkidiki, N. Greece) Magnesite Mine","authors":"Dimitra Papargyriou, E. Tzamos, Andreas Kasinos, Polykarpos Papageorgiou, M. Mitrakas, A. Zouboulis","doi":"10.3390/materproc2021005123","DOIUrl":"https://doi.org/10.3390/materproc2021005123","url":null,"abstract":"Serpentinized peridotite samples—considered nowadays as deposited waste at the magnesite mine of Gerakini (Chalkidiki, N. Greece)—were collected, and their chemical and mineralogical characterization analyzed with Energy-Dispersive X-ray Fluorescence (ED-XRF) and X-ray Diffractometry (XRD). Dry magnetic separation was used as a convenient enrichment method; however, no significant effect was shown in the chemical composition of separated (magnetic and non-magnetic) fractions, except for small increases in the olivine, antigorite and enstatite contents, which were observed in the non-magnetic fraction. Finally, the calcination of ground peridotites at 1520 ◦C, with the addition of CaO, Al2O3 and SiO2, presented a negative effect on the structure of the products with regard to their main refractory properties. In contrast, the addition of Cr2O3 and MgO mineral oxides showed improved refractory properties when compared with the initial material.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121044349","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

Study of Metal Recovery from Printed Circuit Boards by Physical-Mechanical Treatment Processes 物理机械处理法回收印刷电路板金属的研究

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-18 DOI: 10.3390/materproc2021005121

Camila Mori de Oliveira, R. Bellopede, A. Tori, P. Marini

{"title":"Study of Metal Recovery from Printed Circuit Boards by Physical-Mechanical Treatment Processes","authors":"Camila Mori de Oliveira, R. Bellopede, A. Tori, P. Marini","doi":"10.3390/materproc2021005121","DOIUrl":"https://doi.org/10.3390/materproc2021005121","url":null,"abstract":"The acceleration of the global production and consumption of electronic devices and the concerns related to waste electrical and electronic equipment (WEEE) motivated this research. Printed circuit boards (PCB) can be found in almost all types of electronic devices, and their composition contains heavy metals that can cause environmental impacts due to improper disposal. However, on the other hand, there are elements with added value, such as copper, gold, silver, iron, aluminum and other critical raw materials, such as tantalum, that can be recovered. Metal recovery can conserve natural resources since it prevents new minerals from being extracted, being a great contribution to the circular economy. In this research, the PCB element composition was initially determined through the scanning electron microscope analysis. Then, the PCB was shredded in a cutting mill and classified in grain size classes by sieving. Afterwards, magnetic separation has been performed together with gravity and electrostatic separation of the non-magnetic fraction. In gravity separation, the metal recovery was satisfactory for the particle size −0.6 + 0.3 mm and for the particle size −1.18 + 0.6 mm. In electrostatic separation, the efficiencies obtained were higher for the smaller particle size (−0.3 mm).","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133041937","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: 4

How the Proper Management of Extractive Waste Can Support the Circular Economy 采掘废物的妥善管理如何支持循环经济

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-11 DOI: 10.3390/materproc2021005118

P. Maraboutis, N. Poulimenou, Elena Nikolaou

{"title":"How the Proper Management of Extractive Waste Can Support the Circular Economy","authors":"P. Maraboutis, N. Poulimenou, Elena Nikolaou","doi":"10.3390/materproc2021005118","DOIUrl":"https://doi.org/10.3390/materproc2021005118","url":null,"abstract":"The Circular Economy begins at the start of a product’s life cycle. Throughout the life of a product, both the design phase and the manufacturing processes have an influence on sourcing, resource consumption, and waste creation. Article 5.2 (a) and (b) of the Extractive Waste Directive (2006/21/EC) encompasses waste avoidance or reduction and its harmfulness, as well as encourages the recovery of extractive waste via recycling, reusing, or reclaiming, if this is ecologically in conformity with current environmental regulations and technically feasible. After many years of developing Extractive Waste Management Plans by the sector, substantial knowledge has been established across the entire EU that should enable the identification of best practices that merit more widespread implementation across the extractive sector. Two years ago, the European Commission authorized a study to shed light on the practices that strengthen the spirit of the Circular Economy in the field of mineral extraction and its resulting waste streams, applied technologies, and their environmental impacts. This study is focused on (a) the harmfulness of extractive waste generation and its prevention or reduction, (b) the recovery of extractive waste (by recycling, reusing, or reclaiming), as well as (c) the assurance of shortand long-term safe disposal of extractive waste. It is based on the exchange of information among the Member States and extractive industries associations, as well as contact with EU mining companies to determine the best practices used. The present article focuses on achieving a Circular Economy throughout the whole life cycle of an extractive operation and summarizes eight best practices promoting the Circular Economy followed by companies from the extractive sector.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"15 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120872902","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: 1

Numerical Reservoir Modeling of High Enthalpy Geothermal Fields in Greece 希腊高焓地热田储层数值模拟

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-11 DOI: 10.3390/materproc2021005120

Polyanthi Trimi, V. Gaganis, S. Stamataki

引用次数: 0

Risk Management: An Essential “Tool” for the Extractive Sector 风险管理:采掘业必不可少的“工具”

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-11 DOI: 10.3390/materproc2021005119

P. Maraboutis, N. Poulimenou, Elena Nikolaou

{"title":"Risk Management: An Essential “Tool” for the Extractive Sector","authors":"P. Maraboutis, N. Poulimenou, Elena Nikolaou","doi":"10.3390/materproc2021005119","DOIUrl":"https://doi.org/10.3390/materproc2021005119","url":null,"abstract":"Risk management is a methodology through which industry can proactively manage risks (inclusive of potential opportunities and threats), which is a common practice for operators all over the world. For the extractive industries, due to the highly variable operating parameters, such as site-specific conditions, geographical location, local environmental conditions, behavior and characteristics of the ore, and the geological background of the deposit, Risk management (RM) is an essential tool. Risk management as a management technique has developed significantly over the past 20 years, with an array of different tools and techniques being increasingly used globally to address risks pertinent to the extractive sector. The sustainability of the extractive sector will be guided by the environmental, occupational safety and health, and the societal approval of the extractive operations, including the processing plants. Risk management is a holistic approach that assesses all risks associated with the facility’s construction, operation, and closure. This article attempts to highlight the advantages of the implementation of RM approaches by the extractive sector and intends to promote the idea that RM can act as a vehicle to optimize the overall safety and environmental performance of the extractive sector.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133721090","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

A Mathematical and Software Tool to Estimate the Cell Voltage Distribution and Energy Consumption in Aluminium Electrolysis Cells 一种估算电解槽电压分布和能量消耗的数学和软件工具

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-09 DOI: 10.3390/materproc2021005116

V. Vassiliadou, Antonis Peppas, M. Taxiarchou

{"title":"A Mathematical and Software Tool to Estimate the Cell Voltage Distribution and Energy Consumption in Aluminium Electrolysis Cells","authors":"V. Vassiliadou, Antonis Peppas, M. Taxiarchou","doi":"10.3390/materproc2021005116","DOIUrl":"https://doi.org/10.3390/materproc2021005116","url":null,"abstract":"This work aims to deliver the objective of developing an appropriate set of mathematical models and a relevant software program to calculate the voltage distribution and energy consumption of a Hall–Héroult reduction cell, together with a deeper understanding of the complex physical and chemical phenomena underlying the alumina electrolysis process. The work involves an analysis of the basic principles governing the alumina reduction process, the presentation of the sets of the applied mathematical equations to predict the main electrolysis bath physicochemical properties related to the cell voltage, the mass balance of the main cell material inputs and outputs, the energy consumption of the electrolysis cell and the estimation of the cell voltage distribution along the various cells consisting of elements. All the mathematical models were included in an easy-touse software to enable the aluminium cell operators and engineers to introduce and retrieve all the necessary cell operational data and study the effect of the key process parameters on the cell energy performance.","PeriodicalId":235219,"journal":{"name":"International Conference on Raw Materials and Circular Economy","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121080424","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

Bathymetry Surveys of Post-Mining Pit Lakes Formed after Exploitation of Lignite 褐煤开采后形成的矿坑湖测深研究

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-09 DOI: 10.3390/materproc2021005117

A. Bajcar, J. Szczepiński, Barbara Rogosz

引用次数: 2

Restoration of Old Olympias Arsenopyrites Concentrate Storage Area (Former METBA Plot) 旧奥林匹亚毒砂精矿储藏区修复(原METBA地块)

International Conference on Raw Materials and Circular Economy Pub Date : 2022-03-04 DOI: 10.3390/materproc2021005115

Vithleem Gazea, D. Dimitriadis, A. Galatsianou

引用次数: 0