Insights in Mining Science & Technology最新文献

{"title":"Magnetizing Reduction and Magnetic Separation Studies on Low-Grade Iron Ore of Chiniot, Punjab Province, Pakistan","authors":"S. Nasir","doi":"10.19080/imst.2021.02.555599","DOIUrl":"https://doi.org/10.19080/imst.2021.02.555599","url":null,"abstract":"","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117287195","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":"Geophysical Well Logging in Order to Reduce Operating Costs in Mineral Exploration","authors":"A. Carrasquilla","doi":"10.19080/IMST.2021.02.555596","DOIUrl":"https://doi.org/10.19080/IMST.2021.02.555596","url":null,"abstract":"The geophysical well logging is the practice of making a detailed record of the geological formations penetrated by a well. The record can be based on visual inspection of samples brought to the surface (geological records) or physical measurements made by instruments lowered into the hole (geophysical records). Some types of logs can be made during any phase of a well’s history: drilling, completion, production, or abandonment. The logs are carried out in drilled holes for the exploration of oil and gas, underground, mineral, and geothermal water, in addition to part of environmental and geotechnical studies. In the case of mineral exploration, the main interest in using well logs is to seek on compositional and textural variations caused by changes in moisture and hardness of the rocks. Thus, the technic is satisfactory to detect the presence of clay and hydrated bodies, as well as the transition between friable and compact minerals. Therefore, the results open possibilities to changes exploratory drilling meshes with partial replacement of core sampling by rotary percussive boreholes. This allows to do a mineral exploration with lower costs using a faster and cheaper technique, but always using well logs to support the geological interpretation in subsurface.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127400268","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":"An Analytical Model for Axial Force Transfer and the Maximum Compression Point of Work Strings in Extend Reach Drilling","authors":"R. Shaibu","doi":"10.19080/imst.2020.02.555592","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555592","url":null,"abstract":"Complex work string dynamics are often observed when one is investigating the limit of Extended Reach Drilling (ERD), yet the underlying physical causes of anomalous problems are often not fully understood and is thus a topic of ongoing research interest. Theoretical models capturing tubular dynamics have been previously proposed to analyze force transfer in work strings, yet there is significant confusion regarding these models because their published versions are not entirely consistent and, in many cases, do not meet engineering requirement. Further confusion is introduced through variations in pin-pointing locations where axial compression in the work strings should be checked for mechanical integrity. A simple and yet rigorous mathematical model is essential for adequate prediction of axial compression profiles in work strings for ERD. This article presents a simplified tubular mechanics model for describing axial force transfer under ERD conditions. We discuss the model in finding the point of peak compression in casing strings. This point is predicted to be in the arc section near the heel of a horizontal wellbore, under borehole drilling, and casing running conditions. The exact location of the peak axial compression changes with pipe-wall friction coefficient. For the friction coefficient in the range of 0.15 to 0.35, this point occurs in the range of inclination angle between 70.7 o and 81.5 o , averaging 76.1 o . The model can also be used for other purposes, including prediction of depth limit, bottom hole assembly (BHA) design, and locking up analysis of coiled tubing (CT) strings.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130224548","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":"Mining in Turkey","authors":"S. Bilgiç","doi":"10.19080/imst.2020.02.555591","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555591","url":null,"abstract":"Turkey is a country rich diversity of underground resources. Textronic and complex geological structure of Turkey allows the availability of a wide variety of mineral deposits. Today, approximately 90 types of mines are produced in the world. In Turkey, production is made of approximately 60 types of mines. Turkey, in 132 countries across the world, as the total value of mineral production in the 2nd ranks, in terms of the diversity of minerals is ranked 10th. Turkey is a rich country in terms of particularly industrial raw materials, some metallic minerals such as lignite, and geothermal sources of energy. 2.5% of world reserves of industrial raw materials, 1% of coal reserves, 0.8% of the geothermal potential, and 0.4% of the metallic mineral reserves are in Turkey.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"373 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116783597","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":"Demineralization of a Low-Rank Coal to Produce Clean Coal for Industrial Utilization","authors":"S. Nasir","doi":"10.19080/imst.2020.02.555590","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555590","url":null,"abstract":"An investigation was carried out for the demineralization of a low-rank coal containing high ash (37.74%) and sulphur (8.65%) content to clean it for industrial utilization. The raw coal was evaluated by proximate analysis, total sulphur and Gross Calorific Value (GCV). Run-of-mine coal as received was stage crushed and ground under controlled conditions to fair liberation size. The gravity concentration technology using diagonal deck concentrating table was employed to produce clean coal. A number of gravity separation tests were carried out by varying different parameters i.e. feed size, feed rate, wash water flow rate and deck inclination angle. The final de-mineralized clean coal obtained at optimum conditions contained 13.04% ash and 2.61% sulphur and found suitable for many industrial applications.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121428604","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":"Towards A Circular Economy of Proximity? Variable-Geometry Spatiality of Urban Mining","authors":"M. Durand","doi":"10.19080/imst.2020.02.555589","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555589","url":null,"abstract":"The proximity principle is one of the main obligations in European regulations regarding waste management. However, this principle is not really implemented because it is not well defined in the law. Proximity is also linked to the new consensual concept of the circular economy, which highlights the local scale. The objective of this text is to understand the implementation of the proximity principle in the concept of the circular economy depending on waste management channels. The methodology is based on an analysis of the urban metabolism of three French cities and in-person interviews with stakeholders of waste management. The result of this research shows that the implementation of proximity is quite complex and affected by the principle of “variable geometry” depending on the types of waste. Some are managed at the local scale, such as putrescible and fermentable waste, bulky refuse, and final waste. Others, however, are transported elsewhere (e.g., waste with high added value or hazardous waste). We aim to identify the criteria that determine these geographical issues. The diversity of situations in each of these case studies provides the opportunity to better understand the geographical scale of implementation of a circular economy and to identify the sources of urban mining through recyclable materials.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124272350","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":"Governing the Environmental Impact of Dredging: Consequences for Marine Biodiversity in the Niger Delta Region of Nigeria","authors":"Raimi Morufu Olalekan","doi":"10.19080/imst.2020.02.555586","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555586","url":null,"abstract":"The attention of most scholars and stakeholders is far drawn from the devastation of the environmental consequences caused by dredging related activities, which has necessitated sand filling and pilling including skewed national government policies, which has resulted to fundamental concern to halt species extinction, a situation which ecologist are not at ease with. Emphasis has been focused on alterations in the chemistry of the environment. They are worried with the numerous vanished creatures and saddened, often angered by their extinction. Man has directly or indirectly been the cause of the extinction, including the issues of depletion and degradation impact on the environment, thereby, leading to restrictions in the size, density, and distribution of organisms that threaten the biodiversity, resilience, or provision of ecosystem services. As soon as the functionally significant components of an ecosystem are missing, it is extremely challenging to identify and understand ecological thresholds. The extent and intensity of human disturbance to oceanic ecosystems is a significant threat to both structural and functional biodiversity and in many cases this has virtually eliminated natural systems that might serve as baselines to appraise these impacts. It is therefore recommended that effective management of dredging problems in the Niger delta will require enforcement of relevant environmental laws, environmental monitoring, as it help limits the huge expenses on habitat clean-up exercises and restoration programs and critical habitats should be banned or carried out in such a manner as to protect the area or limit dredging to the lowest ecological damage. This should be pressure on all oil companies and relevant stakeholders to discontinue with dredging related activities. Petrochemical such as oils and other hydrocarbon should not be present in the aquatic environment in concentration that can cause tainting of edible aquatic organism, form visible deposits on shoreline and bottom sediment or be detected as a visible film/sheen or discoloration.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126281028","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":"Formation of the Cast Billets Structure Under External Thermal-Power Influence","authors":"N. Addi","doi":"10.19080/imst.2020.02.555584","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555584","url":null,"abstract":"The method of physical modeling was used to study the effect of superheat temperature, cooling intensity, and vibration on the formation of the cast billets structure. It was established that, using the different combinations of the considered methods of influencing the melt, it is possible to neutralize the negative effect of large overheating on the dispersion of the structure. It is clearly shown that, regardless of the level of melt overheating and the cooling intensity, vibration processing of hardened alloys with high efficiency ensures the formation of a favorable structure of the cast billets.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131384403","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":"Life Cycle Analyses of PV Solar Systems: Nowadays, Forecast, Process and Replacements","authors":"N. Domingues","doi":"10.19080/imst.2020.02.555583","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555583","url":null,"abstract":"Taking advantage of the technology’s fiercely improved competitiveness in Solar Power, Portugal is investing solid in this type of technology. Solar energy has been presented as a key solution for satisfying the energy demand with environmental and social benefits. Being true on energy production (electricity and thermal), on the remaining life cycle one can find evidences far from it. The electric components of a PV panel are still based on rare elements, such as Silicium. The manufacturing the Solar panels requires cooper, iron, steel and other metals. The electricity by PV production obliges the use of storage devices, mainly batteries, that uses elements dangerous for the environment, such as acids. Also, modern batteries are based on rare elements, such as lithium. The exploration of raw materials, such as silicium and lithium, is very controversial because of the local social impacts on agriculture, forestry, and landscape of rural areas, for example. The present paper presents the different principal technologies on market (monocrystalline, polycrystalline and thin film), the necessary devices (load regulator, protections, e.g.), the common devices (such as storage devices and backup systems), and focus on their materials impact, based on a life-cycle analyses. The present paper also presents the process of full recycling a PV solar system. It is possible to realize that, despite the high energy impact and environmental impact in mining and manufacturing, the PV solar systems fully compensate in the short run. Thereby, there is not only the economic advantage.","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129470365","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":"Diagenetic Facies Study of Chang 8 Reservoir in Triassic Yanchang Formation in Jiangjiachuan Area of Ordos Basin","authors":"Qi Hao","doi":"10.19080/imst.2020.02.555581","DOIUrl":"https://doi.org/10.19080/imst.2020.02.555581","url":null,"abstract":"","PeriodicalId":434464,"journal":{"name":"Insights in Mining Science & Technology","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114841079","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}