Materials Proceedings最新文献_第9页

Potential Uses of Copper Wastes in the Building Sector: Inertization and Added Value Solutions 铜废料在建筑行业的潜在用途:惯性化和增值解决方案

Materials Proceedings Pub Date : 2021-11-23 DOI: 10.3390/materproc2021005025

Santiago Rosado, L. Gullón, L. F. M. Martínez, Juan F. Llamas Borrajo

引用次数: 2

The Dual Paradigm of Mining Waste: “From Ecotoxicological Sources to Potential Polymetallic Resources”—An Example from Iberian Pyrite Belt (Portugal) 矿业废弃物的双重范式:“从生态毒理学来源到潜在多金属资源”——以葡萄牙伊比利亚黄铁矿带为例

Materials Proceedings Pub Date : 2021-11-23 DOI: 10.3390/materproc2021005023

S. Barbosa, A. Dias, A. Ferraz, Sandra Amaro, M. G. Brito, J. Almeida, S. Pessanha

{"title":"The Dual Paradigm of Mining Waste: “From Ecotoxicological Sources to Potential Polymetallic Resources”—An Example from Iberian Pyrite Belt (Portugal)","authors":"S. Barbosa, A. Dias, A. Ferraz, Sandra Amaro, M. G. Brito, J. Almeida, S. Pessanha","doi":"10.3390/materproc2021005023","DOIUrl":"https://doi.org/10.3390/materproc2021005023","url":null,"abstract":"The main goal of this study was to identify potential chemical elements present in three types of polymetallic mine waste, stored in the old mine site of São Domingos, located in the Iberian Pyrite Belt, Alentejo, Southern Region of Portugal. This study involves the characterization of potential resources in those mine residues, bearing in mind that its reprocessing can facilitate the environmental remediation and rehabilitation activities which are underway at the site. X-ray Fluorescence (XRF) and micro (μ)-XRF 2D mapping surveys were performed. Univariate and multivariate data analysis reveal that differences in compositions are mainly related with element concentration per type of waste. Image processing and clustering analysis allowed the recognition of distinct elemental spatial distribution patterns. Some of these residues, although classified as archeological-industrial heritage materials may present toxicity to the ecological environment and to human health. This fact enhances, therefore, geoethical doubts regarding its remining and exploitability. In this context, a multi-criteria decision analysis considering two geoethical alternatives was performed.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"198 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77503390","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

Exploitation of Kaolin as an Alternative Source in Alumina Production 高岭土在氧化铝生产中的替代资源开发

Materials Proceedings Pub Date : 2021-11-23 DOI: 10.3390/materproc2021005024

Bagani Maria, Balomenos Efthymios, Panias Dimitrios

{"title":"Exploitation of Kaolin as an Alternative Source in Alumina Production","authors":"Bagani Maria, Balomenos Efthymios, Panias Dimitrios","doi":"10.3390/materproc2021005024","DOIUrl":"https://doi.org/10.3390/materproc2021005024","url":null,"abstract":"The extensive consumption of aluminum, combined with the shortage of the existing raw materials, and particularly bauxite, necessitates the exploitation of alternative raw materials for the production of alumina. The present paper focuses on the possible use of kaolin, as an abundant, cheap and high-aluminum content raw material, in alumina production, via the application of the Aranda-Mastin technology in the leaching step. From this point of view, leaching experiments were conducted on untreated kaolin and thermally treated, metakaolin, applying atmospheric pressure, temperature of 90 °C and with an aqueous solution of a low HCl concentration as the leaching agent. Leaching, in the aforementioned conditions, is an industrially applied process, characterized by highly efficient aluminum dissolution in the case of metakaolin with low silicon dissolution at a short retention time, but with respectively lower achieved results for untreated kaolin. In order to raise the aluminum dissolution rate from untreated material, temporal and subsequently chemical intensification was applied. The analysis indicated a higher aluminum dissolution rate, up to 70%, with the application of a high acid concentration of leaching agent, performed for a long retention time that could be further improved.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83147242","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: 2

Introducing the IDEF0 Methodology in the Strategic Planning of Projects for Reclamation and Repurposing of Surface Mines 在露天地雷的填海和重新利用项目的战略规划中采用IDEF0方法

Materials Proceedings Pub Date : 2021-11-23 DOI: 10.3390/materproc2021005026

P. Spanidis, F. Pavloudakis, C. Roumpos

引用次数: 3

MCDM Applied to the Evaluation of Transitional and Post-Mining Conditions—An Innovative Perspective Developed through the EIT ReviRIS Project MCDM在过渡时期和开采后条件评价中的应用——通过EIT ReviRIS项目开发的创新视角

Materials Proceedings Pub Date : 2021-11-22 DOI: 10.3390/materproc2021005022

Sandra Amaro, S. Barbosa, Gloria Ammerer, Aina Bruno, J. Guimerà, Ioannis Orfanoudakis, A. Ostręga, E. Mylona, M. Hitch, Jessica Strydom

{"title":"MCDM Applied to the Evaluation of Transitional and Post-Mining Conditions—An Innovative Perspective Developed through the EIT ReviRIS Project","authors":"Sandra Amaro, S. Barbosa, Gloria Ammerer, Aina Bruno, J. Guimerà, Ioannis Orfanoudakis, A. Ostręga, E. Mylona, M. Hitch, Jessica Strydom","doi":"10.3390/materproc2021005022","DOIUrl":"https://doi.org/10.3390/materproc2021005022","url":null,"abstract":"In mine design and planning, the identification of an appropriate Post-Mining Land Use (PMLU) is necessary and crucial to achieve environmental quality, socio-economic renewal, and social acceptance of mining projects. In this context, Multi-Criteria Decision Making (MCDM) methods support decision-makers and stakeholders, identifying the relevant factors and criteria, so that, different available alternatives can be evaluated, compared, and contrasted with each other. With the vision to enable its wide application, 15 mine profiles are identified which, combined with selected MCDM methods and relevant factors, results in a Multi-Criteria Decision Analysis (MCDA) framework for PMLU. In this preliminary framework, the MCDM methods selected are SIMUS, TOPSIS, and SMARTER. They serve different problems and, therefore, are used in different profiles: SIMUS is applied to complex profiles, TOPSIS to the lesser ones, and SMARTER is used due to its capacity of assigning weights to criteria based on Ranking Order Centroid calculations. This preliminary MCDA structure gives the possibility to include the complexity (technical and decisional) and a participatory process, for all stakeholders involved concerning PMLU.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90779193","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

LCA and LCC of Emerging and Incumbent Technologies on Energy Harvesters 能源采集器新兴技术和现有技术的LCA和LCC

Materials Proceedings Pub Date : 2021-11-19 DOI: 10.3390/materproc2021005021

A. Malagnino, M. Rostagno, G. Amaro, A. Vlysidis, A. Gkika, E. Koumoulos, Yi Qin

引用次数: 0

Achieving the Carbon-Neutral Production of Magnesia and Silica Products Using a HCl-Based Process in Serpentine Feedstock 在蛇纹石原料中采用盐酸法实现镁和硅产品的碳中性生产

Materials Proceedings Pub Date : 2021-11-18 DOI: 10.3390/materproc2021005019

David Konlechner, Gregor Kappacher

引用次数: 0

Geotechnical Engineering Perspectives: Challenges and Solutions in the Transition to a Post-Lignite Era 岩土工程展望:过渡到后褐煤时代的挑战和解决方案

Materials Proceedings Pub Date : 2021-11-17 DOI: 10.3390/materproc2021005017

I. Zevgolis, A. Theocharis, N. Koukouzas

引用次数: 0

Thermal Activation of Kaolin: Effect of Kaolin Mineralogy on the Activation Process 高岭土的热活化:高岭土矿物对活化过程的影响

Materials Proceedings Pub Date : 2021-11-17 DOI: 10.3390/materproc2021005018

D. Kosmidi, C. Panagiotopoulou, P. Angelopoulos, M. Taxiarchou

{"title":"Thermal Activation of Kaolin: Effect of Kaolin Mineralogy on the Activation Process","authors":"D. Kosmidi, C. Panagiotopoulou, P. Angelopoulos, M. Taxiarchou","doi":"10.3390/materproc2021005018","DOIUrl":"https://doi.org/10.3390/materproc2021005018","url":null,"abstract":"Kaolin is an industrial mineral used in a wide variety of applications due to its crystalline structure, mineral and elemental composition. After kaolin undergoes heat treatment in a specific temperature range, metakaolin, which exhibits a strong pozzolanic reaction, is formed. This paper examines the effects of different kaolin qualities on the thermal activation process of metakaolin production. The qualities of kaolin depend on the impurities they contain, such as mica, feldspar and quartz. In this study, four different samples of kaolin are investigated. Each sample was heat treated in a lab-scale rotary kiln in order to study the chemical, structural and morphological changes that occurred and their influence on pozzolanic activity. The parameters being considered in the experimental process were the temperature and the duration of the treatment. Thus, the calcination process for each of the four kaolin types was carried out at 600, 650 and 700 °C for 3 h. The occurred changes were monitored using XRD, FTIR and DTA analysis. Additionally, the reactivity of all thermally treated samples was evaluated based on the Chapelle test. The results showed that the fewer the impurities, the easier the transformation of the material to metakaolin. The optimum result was the metakaolin, which originated from the purest quality of kaolin and was comparable to the commercial product. Finally, the pozzolanic activity of the thermally activated samples also depended on the purity of the kaolin.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83019260","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

Development of Emission Factor Equations for Surface Mining Activities: The Case of the Stacker 露天采矿活动排放因子方程的建立:以堆矿机为例

Materials Proceedings Pub Date : 2021-11-16 DOI: 10.3390/materproc2021005015

A. Triantafyllou, I. Kapageridis, S. Gkaras, F. Pavloudakis

引用次数: 0