Journal of Minerals and Materials Characterization and Engineering最新文献_第6页

Mineralogy, Petrography and Geochemistry of the Ina Syenite (Linté, Central Cameroon) as a Source of Industrial Feldspars 作为工业长石来源的伊纳正长岩的矿物学、岩石学和地球化学

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2022-01-01 DOI: 10.4236/jmmce.2022.103022

Soualiou Njimbouombouo Mouliom, A. Njoya, R. Y. Fouateu, Nguo Silvestre Kanouo, Daniel Lamilen Mbila, B. Charlier, N. Fagel

引用次数: 1

Comparative Study of the Reactivity of Clay Earth Materials for the Production of Compressed Earth Blocks in Ambient Conditions: Effect on Their Physico-Mechanical Performances 环境条件下生产压缩土块的粘土材料反应性的比较研究:对其物理力学性能的影响

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2022-01-01 DOI: 10.4236/jmmce.2022.101004

Tarmangue Dime, Seick Omar Sore, Philbert Nshimiyimana, A. Messan, L. Courard

引用次数: 3

Recovery of Cassiterite and Topaz Minerals from an Old Metallurgical Dump, Eastern Desert of Egypt 埃及东部沙漠古冶金堆中锡石和黄玉矿物的回收

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-09-08 DOI: 10.21203/rs.3.rs-367732/v1

S. S. Ibrahim, A. Hagrass, K. Yassin, W. Fathy, T. Boulos

{"title":"Recovery of Cassiterite and Topaz Minerals from an Old Metallurgical Dump, Eastern Desert of Egypt","authors":"S. S. Ibrahim, A. Hagrass, K. Yassin, W. Fathy, T. Boulos","doi":"10.21203/rs.3.rs-367732/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-367732/v1","url":null,"abstract":"\u0000 Huge amounts of tailing dumps as a result of mines’ blasting operations were impacting both economical and environmental problems. This issue was in serious need to be treated with suitable solutions. Evaluation of one of these tailing dumps in the Eastern Desert of Egypt showed the presence of reasonable amount of cassiterite mineral reaching 0.199%. The mineral was found as finely disseminated particulates within varieties of quartz-feldspar-hornblende-biotite granitic formations. In the present study, the processing regime relied upon the synergy between reaching liberation size, and mineral over grinding due to its extreme brittleness. However, delicate grinding via attrition scrubbing was adopted to produce − 0.51 + 0.074 mm attrition product with fine fractions, reaching 62.31% and 37.59%, respectively. The recovery of cassiterite from the − 0.50 + 0.074 mm size fraction was accomplished by the physical difference between mother granitic formations that shielded the mineral grains. Under these conditions, joint shaking table/dry high intensity magnetic separation techniques were conducted to recover cassiterite mineral. The CCD statistical system was used as a mathematical approach to optimize the effect of the main working parameters of the magnetic separator, i.e., splitter inclination angle, and belt speed, and their interactions on the cassiterite recovery of the final concentrate. The suggested flow sheet succeeded to recover cassiterite mineral with a grade reaching 11.25% SnO2 with 94.08% operational recovery from a feed contained 0.19% SnO2. These results are highly imperative to achieve applicable processing flow-sheet of such kind of minerals’ secondary resources.","PeriodicalId":16488,"journal":{"name":"Journal of Minerals and Materials Characterization and Engineering","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75300911","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

Experimental Study on Polymer Nanocomposites Based Strain Sensors for Structural Health Monitoring 基于聚合物纳米复合材料的结构健康监测应变传感器实验研究

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/jmmce.2021.95034

R. Kiran, Kupparavalli Ramamurthy Prakash, P. Chandra, Venkatarayappa Ravi Kumar, Padubidere Bhaskara Asha, C. Rao

{"title":"Experimental Study on Polymer Nanocomposites Based Strain Sensors for Structural Health Monitoring","authors":"R. Kiran, Kupparavalli Ramamurthy Prakash, P. Chandra, Venkatarayappa Ravi Kumar, Padubidere Bhaskara Asha, C. Rao","doi":"10.4236/jmmce.2021.95034","DOIUrl":"https://doi.org/10.4236/jmmce.2021.95034","url":null,"abstract":"The aim is to develop a mechanically flexible polymer nanocomposite film-based strain sensors that could act towards sustainable structural health monitoring for civil structures. The developed polymer nanocomposite film combinations will be monitored for their structural, electrical and mechanical behaviors and the optimized formulations will be tried for strain sensing applications. The films were cast by using PVA as the base polymer and copper doped silver nitrate as the nanofiller along with the use of glycine as fuel which is a combination of silver and copper nitrate. After preparing the films, they were tested for conductivity under tensile loading using a digital multi meter connected to a UTM. The samples were subjected to XRD, FTIR and SEM for further analysis. The results of the experiments shown I-V characteristics of PVA-CuAgO composites from 5% to 25% CuAgO have been increased tremendously with the incorporation of filler material. For 100 V, the maximum current value obtained for plain PVA is only 7.7E-8 A, whereas CuAgO particles shown 0.0025 A at 5% reinforcements and further increased nearly to 0.025 A for 25% of CuAgO particles into the PVA matrix.","PeriodicalId":16488,"journal":{"name":"Journal of Minerals and Materials Characterization and Engineering","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83549263","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

MOF(ZM)/Potassium Citrate-Derived Composite Porous Carbon and Its Electrochemical Properties MOF(ZM)/柠檬酸钾衍生复合多孔碳及其电化学性能

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/jmmce.2021.95031

Guoqing Zhang, Pitao Wang, Chi Zhang, Lili Wu, Jing Yang, Mingjian Zhang, Zhong Ren, Jianqiang Zhang, Heming Luo

{"title":"MOF(ZM)/Potassium Citrate-Derived Composite Porous Carbon and Its Electrochemical Properties","authors":"Guoqing Zhang, Pitao Wang, Chi Zhang, Lili Wu, Jing Yang, Mingjian Zhang, Zhong Ren, Jianqiang Zhang, Heming Luo","doi":"10.4236/jmmce.2021.95031","DOIUrl":"https://doi.org/10.4236/jmmce.2021.95031","url":null,"abstract":"Metal-organic frameworks are compounds with a reticulated skeletal structure formed by chemically bonding inorganic and organic units that are widely used in many fields, such as photocatalysis, gas separation and energy storage, because of their unique structures. In this paper, we prepared a metal-organic framework [(μ2-2-methylimidazolyl)12-Zn(ii)6-H18O10]n(ZM) with well-developed pores and high specific surface area of MOFs by the solution method. And MOF-derived porous carbon was prepared by the direct charring method in an argon atmosphere using a mixture of ZM, ZM and potassium citrate as carbon precursors. Characterization analysis revealed that the maximum specific surface area of ZMPC-800-1:15 was 2014.97 m2⋅g−1, and the pore size structure was mainly mesoporous. At a current density of 1.0 A⋅g−1 the specific capacitance of ZMC-800 and ZMPC-800-1:15 was 121.3 F⋅g−1 and 226.6 F⋅g−1, respectively, with a substantial increase of 86.8%. The specific capacitance of ZMPC-800-1:15 decays to 168.8 F⋅g−1, with a decay rate of 25.5%, when the current density increases to 10.0 A⋅g−1. After 5000 constant current charge/ discharge cycles, the capacitance retention rate was still 96.41%. These results prove that the application of MOF-derived carbon materials in future supercapacitors is very promising.","PeriodicalId":16488,"journal":{"name":"Journal of Minerals and Materials Characterization and Engineering","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89250898","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

Synthesis of Bi2Fe4O9 Crystalline Ceramic as Extremely Capable Photocatalyst via Proficient Chemical Route 高效光催化剂Bi2Fe4O9晶体陶瓷的化学合成

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/jmmce.2021.95030

M. Verma, Vinod Kumar, T. Das, R. Sonwani, Vishnu Shankar Rai, Dinesh I. Prajapati, Kedar Sahoo, Vishal Kushwaha, Asha Gupta, K. Mandal

引用次数: 3

Morphology Study of Particle Breakage Mechanisms in a Horizontal Stirred Mill: Automated and Manual Point Counting Approaches 卧式搅拌磨中颗粒破碎机理的形态研究:自动和手动点计数方法

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/jmmce.2021.95035

Reem Roufail, B. Klein

{"title":"Morphology Study of Particle Breakage Mechanisms in a Horizontal Stirred Mill: Automated and Manual Point Counting Approaches","authors":"Reem Roufail, B. Klein","doi":"10.4236/jmmce.2021.95035","DOIUrl":"https://doi.org/10.4236/jmmce.2021.95035","url":null,"abstract":"High-speed stirred mills are utilized to grind particles below 10mm. Grinding sulphide minerals to as low as 10mm achieve adequate mineral liberation for successful downstream mineral processing operations, such as flotation and leaching. Particle breakage mechanism such as fracture or abrasion, determines the morphological surface features of the product particles. It is anticipated that particles, which break along grain boundaries (intergranular) produce rough surfaces, whereas particles that break across the grain boundaries (transgranular) possess smoother surfaces. In this study, particles are ground in a stirred mill and their morphological features were analyzed using automated and manual detection methods. Literature and conventional belief are that high-speed stirred mills break particles by attrition. This paper showed that fracture is also an important breakage mechanism along with attrition. Breakage mechanism is a factor of input stress intensity, in the form of the mill agitator speed, and type of mineral. It is observed that at higher agitator speed galena fractures along the grain boundaries, whereas quartz, abrade across the grain boundaries.","PeriodicalId":16488,"journal":{"name":"Journal of Minerals and Materials Characterization and Engineering","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74478532","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

Usability of a Natural Tuff as Admixture in Clinker and Its Influence on the Physico-Chemical and Mechanical Properties of Mortar 天然凝灰岩作为熟料掺合料的可用性及其对砂浆理化力学性能的影响

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/JMMCE.2021.95032

L. Zerbo, Moustapha Sawadogo, Y. Sawadogo, Salfo Salogo, Moussa Ouedrago, M. Seynou, G. Lecomte‐Nana, P. Blanchart

引用次数: 2

Analysis of Roof Failure at the Intersections on a Coal Mining 某煤矿十字路口顶板破坏分析

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/jmmce.2021.95033

A. Zingano, Marcelo Andrade

{"title":"Analysis of Roof Failure at the Intersections on a Coal Mining","authors":"A. Zingano, Marcelo Andrade","doi":"10.4236/jmmce.2021.95033","DOIUrl":"https://doi.org/10.4236/jmmce.2021.95033","url":null,"abstract":"The objective of this paper is to understand the behavior of the roof and the cause of roof failure of a coal mining. Eleven roof falls occurred in the mine section in sequence. All the roof falls were surveyed, and the geological features were determined which include rock type, mechanical properties, and thickness. The immediate roof thickness was interpolated to determine the cause of the roof failures which was the inappropriate roof support where the immediate roof is thicker. The average thickness of the immediate roof was determined by the drilling log in 1.2 m (3.9 ft.). The roof support was design based on the average thickness, and the bolt length is 1.5 m (4.9 ft.) in suspension. The challenge was to estimate where the immediate roof gets thicker and to design the support considered to maintain the regular bolt length. This is because the cost and productivity of support operation could increase if the bolt length changes as the roof thickness changes. The idea was to adjust the support for beam building with a fully grouted bolt and rearrange the bolt geometry to keep the roof stable. It means, with the same bolt length the type of roof support would change from suspension to beam building depending on when the roof gets thicker. Two empirical approaches were considered to design the roof support: 1) CMRR and 2) RMR. The entry width is 5 m and the roof support was designed with four bolts per row. Where the roof support must change to beam building, the number of bolts per row changes to five or six. The results of the design and application on underground showed that the approach keeps stable.","PeriodicalId":16488,"journal":{"name":"Journal of Minerals and Materials Characterization and Engineering","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91526863","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

Titanium Carbide Effects on the Fracture of Inconel 100—A Case Study 碳化钛对Inconel 100-A断裂的影响

Journal of Minerals and Materials Characterization and Engineering Pub Date : 2021-08-26 DOI: 10.4236/JMMCE.2021.95029

D. Moreno, O. Kam, Boris Wolfman, O. Nafman, Shir Abrahami, A. Cohen, Yochanan Nachmana, Zion Harush, M. Shapira

引用次数: 2