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Vásquez-granados Alberto - One of the best experts on this subject based on the ideXlab platform.
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Trazabilidad de la varilla de acero para construcción #3 en ArcelorMittal Costa Rica
'Instituto Tecnologico de Costa Rica', 2020Co-Authors: Vásquez-granados Alberto, Abarca-guerrero LillianaAbstract:The construction industry aims to transform raw materials into semi-finished or finished pRoducts. Within this is the Steel industry to which major environmental impacts are attributed due to the intensity of use of resources during their raw material extraction, pRoduction processes and alike. To determine those impacts some methodologies are available such as Life-Cycle Assessment (LCA), which allows quantifying and assessing the potential environmental impacts associated with processes or pRoducts during stages of its existence. In the present study, the traceability of construction Steel Rod #3 was determined in ArcelorMittal Costa Rica for the stages of pRoduction and transportation of raw material and pRoduction and transportation of the Steel Rod. An inventory of inputs and outputs of each stage of the life cycle was created which was evaluated by SimaPro 8.2.3 software, using the Ecoinvent databases. The results of the life cycle impact assessment (LCIA), revealed that the greatest impacts of the entire system occurred at the stage of Steel ingots pRoduction due to the raw materials. It was also determined that during the transport stage, the use of the train generates more impacts than the transport by boat per kilometer transporting a ton of material. For the Rod pRoduction phase, the biggest impacts associated are related to the gas emission from the furnace chimney. Finally, in the transport of the Steel Rod showing proportionality, more fuel is consumed when greater weight is transported.La industria constructiva transforma materias primas en pRoductos elaborados o semielaborados. Dentro de ésta se encuentra la industria del acero, a la cual se le atribuyen grandes impactos ambientales por la intensidad en el uso de recursos durante su proceso pRoductivo. Para determinar dichos impactos existen hoy día metodologías como el Análisis de Ciclo de Vida (ACV), que permite cuantificar y evaluar los impactos ambientales potenciales asociados a procesos o pRoductos durante las etapas de su existencia. En el presente estudio se determinó la trazabilidad de la varilla de acero para construcción #3 en la empresa ArcelorMittal Costa Rica, en las etapas de pRoducción y transporte del lingote de acero y la pRoducción y transporte de la varilla de acero. Se creó un inventario de las entradas y salidas de cada etapa del ciclo de vida y se evaluó mediante el software SimaPro 8.2.3, empleando las bases de datos de Ecoinvent. Con la evaluación de impacto de ciclo de vida (EICV), se obtuvo que los mayores impactos se pRodujeron en la etapa de pRoducción del lingote de acero, como consecuencia del uso de materias primas vírgenes. Durante el transporte del lingote se determinó que el transporte en tren genera más impacto que el transporte en buque por kilómetro recorrido transportando una tonelada del material. Para la etapa de pRoducción de la varilla los mayores impactos se asocian a la emisión de gases desde la chimenea del horno. Finalmente, en el transporte de la varilla se demostró que a mayor peso transportado se consume más combustible, por lo que existe una proporcionalidad
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Trazabilidad de la Varilla de Acero para Construcción #3 como base para la elaboración de la Declaratoria Ambiental del PRoducto en ArcelorMittal Costa Rica
Instituto Tecnológico de Costa Rica, 2016Co-Authors: Vásquez-granados AlbertoAbstract:Proyecto de Graduación, (Licenciatura en Ingeniería Ambiental) Instituto Tecnológico de Costa Rica, Escuela de Química, 2016.The construction industry aims to transform raw materials into semi-finished or finished pRoducts. Within this is the Steel industry to which major environmental impacts are attributed due to the intensity of use of resources (materials and energy) during their raw material extraction, pRoduction processes and alike. To determine those impacts some methodologies are available such as Life-Cycle Assessment (LCA), which allows quantifying and assessing the potential environmental impacts associated with processes, pRoducts or services during all stages of its existence. LCA also serves as a basis for obtaining international environmental certifications such as Environmental PRoduct Declaration (EPD), which provide quantified and verifiable information on the environmental performance of a pRoduct. The present study aims to determine the traceability of construction Steel Rod # 3 in the company ArcelorMittal Costa Rica for the stages of pRoduction and transportation of raw material and pRoduction and transportation of the Steel Rod; as a basis for DAP. An inventory of inputs and outputs of each stage of the life cycle was created which was evaluated by SimaPro 8.2.3 software, using the Ecoinvent databases. The results of the life cycle impact assessment (LCIA), revealed that the greatest potential environmental impacts of the entire system occurred at the stage of Steel ingots pRoduction due to the raw materials. It was also determined that during the transport stage, the use of the train generates more impacts than the transport by boat per kilometer transporting a ton of material. For the Rod pRoduction phase the biggest impacts associated are related to the gas emission from the furnace chimney. In the transport of the Steel Rode phase, it was demonstrated that there is a proportionality between the fuel consumed and the weight of pRoduct transported. Finally, it was determined that to address the information gap to reach the DAP of the Steel Rod, it is necessary to update the life cycle inventory with more accurate and updated information for the different life cycle stages in accordance with the certification process and perform a LCA with SimaPro professional license to provide a better assessment of the system under study.ArcelorMittal Costa Ric
Ahmad Jonidi Jafari - One of the best experts on this subject based on the ideXlab platform.
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removal of lead and zinc from battery industry wastewater using electrocoagulation process influence of direct and alternating current by using iron and stainless Steel Rod electRodes
Separation and Purification Technology, 2014Co-Authors: Hossein Jafari Mansoorian, Amir Hossein Mahvi, Ahmad Jonidi JafariAbstract:Abstract In this study the efficiency of electrocoagulation by direct and alternating current in the removal of lead and zinc has been evaluated. Wastewater samples were taken from the battery building industry. In the electrochemical cell, metal iron and stainless Steel Rod electRodes were used and were connected together serially and monopolar to the power source. By using alternating current the removal of lead and zinc was done successfully with iron electRodes and in the current density of 6 mA/cm 2 which was respectively 96.7% and 95.2% and with stainless Steel electRodes in current density of 8 mA/cm 2 was 93.8% and 93.3%. By using direct current the optimum removal of lead and zinc with iron electRodes was respectively with 97.2% and 95.5% in current density of 6 mA/cm 2 and with stainless Steel electRodes was equal to 93.2% and 92.5% in current density of 8 mA/cm 2 was achieved. With alternating current the optimum energy was achieved by using iron electRodes and was 0.69 km h/m 3 and 0.72 kg/m 3 and with stainless Steel electRodes were 0.98 km h/m 2 and 0.9 kg/m 3 . In direct current the optimum amount of energy with iron and stainless Steel electRodes wererespectively1.97 kW h/m 2 and 1.17 kg/m 3 and 2.53 kW h/m 3 and 1.42 kg/m 3 . The maximum amount of sludge was made in alternating current with a 0.084 kg/m 3 current density and in direct current at 0.091 kg/m 3 . According to the results this process can be used as a suitable method for a wide use of electrolyte reactors in the industrial scale and for removing lead and zinc from aqueous environments.
M.l. Martinez-perez - One of the best experts on this subject based on the ideXlab platform.
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Measurement and modelling of residual stresses in straightened commercial eutectoid Steel Rods
Acta Materialia, 2005Co-Authors: M.l. Martinez-perez, C.r. Borlado, Federico J. Mompeán, Mar García-hernández, J. Gil-sevillano, Jesus Ruiz-hervias, J.m. Atienza, Manuel Elices, Ru Lin Peng, Mark R. DaymondAbstract:Neutron strain scanning measurements on a eutectoid Steel Rod that has been subjected to standard industrial coiling and straightening operations are presented. Strains were determined non-destructively using two different diffractometers, one at a steady-state neutron source and the other at a pulsed spallation neutron source, with measurements made in both the ferrite and cementite components of the pearlitic microstructure. The residual stress state is explained in terms of a simplified analytical model for a two-phase material, which takes into account the successive loading operations contributing to residual stress. The results show that residual stresses generated by bending–straightening operations are significant and are likely to play an important role in the mechanical properties of the final wires.
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Residual stress profiling in the ferrite and cementite phases of cold-drawn Steel Rods by synchrotron X-ray and neutron diffraction
Acta Materialia, 2004Co-Authors: M.l. Martinez-perez, C.r. Borlado, Federico J. Mompeán, Mar García-hernández, Jesus Ruiz-hervias, J.m. Atienza, Manuel Elices, Ru Lin Peng, J. Gil-sevillano, T. BuslapsAbstract:Residual stress profiles have been measured in the ferrite and cementite phases of a cold-drawn eutectoid Steel Rod by neutron and synchrotron X-ray diffraction in three orientations (axial, radial and hoop). Neutron diffraction was employed to measure the ferrite stresses, whereas synchrotron radiation was used for ferrite and cementite stresses. Experimental results in the ferrite phase showed excellent agreement between both experimental techniques when gauge volume effects were accounted for. Axial cementite stresses were always tensile, with a maximum value close to 1700 MPa at the Rod surface. Radial and hoop cementite stresses were compressive along the diameter of the Rod, with a minimum of -1900 MPa at the Rod center. A 3D-finite element simulation of the macro residual stresses resulting from cold-drawing showed remarkable agreement with those determined from the experimental measurements in the ferrite and cementite phases.
Yuji Watanabe - One of the best experts on this subject based on the ideXlab platform.
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Simulation of Heat Generation Behavior in Ti-coated Ablation Needle for Cancer Therapy using High-frequency Induction Technique
2015Co-Authors: Takashi Naohara, Hiromichi Aono, Tsunehiro Maehara, Hideyuki Hirazawa, Shinya Matsutomo, Yuji WatanabeAbstract:For the purpose of developing a novel ablation therapy for oral cancer, the heat generation behavior of a prototype Ti-coated needle with an inserted carbon Steel Rod was simulated in a high-frequency induction field at 350kHz. Based on the magnetic field analysis performed at the inclination angle of θ= 0o relative to the magnetic flux direction, both the magnetic flux density and eddy current density were the highest at the surface and in its vicinity, but drastically decreased with the depth in the inserted ferromagnetic carbon Steel Rod. For the simulation image at the inclination angle of θ= 90o, the eddy current flowed on the outer Ti component which has an enlarged area perpendicular to the magnetic flux direction. The heat transfer simulation was also performed for the tissue-mimicking phantom subjected to the Ti-coated ablation needle using heat analysis software. In the heat transfer simulation images, the temperature distribution was visualized in the longitudinal section for induction times up to 1200s. The generated heat spread in the transverse direction from the specimen into the tissue-mimicking phantom. However, no significant heat transfer was achieved to the underside of the specimen, which is situated in the longitudinal direction. These results suggest that the visualization of the heat transfer behavior is effective to obtain the optimum distance among the Ti-coated ablation needles in clinical use.
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High-frequency induction heating of Ti-coated mild Steel Rod for minimally invasive ablation therapy of human cancer
Journal of Magnetism and Magnetic Materials, 2013Co-Authors: Takashi Naohara, Hiromichi Aono, Kentaro Shirai, Tsunehiro Maehara, Hideyuki Hirazawa, Shinya Matsutomo, Yuji WatanabeAbstract:Abstract For application as a novel ablation therapy of human cancer, the heating property of a Ti-coated mild Steel Rod was studied in an AC magnetic field at 300 kHz. When the Ti-tube thickness was as low as 0.1 mm, the specimen, when placed parallel to the magnetic flux direction ( θ =0°), exhibited a significant increase in temperature; however, its value gradually decreased with the increasing Ti thickness. In computer simulation images, the high magnetic flux concentration and concurrent large current density were observed around the interface between the mild Steel Rod and the Ti-tube. The heating property was drastically different at the three inclination angles ( θ =0°, 45°, and 90°) to the magnetic flux direction. However, the effect of the inclination angle was markedly reduced in the mild Steel Rod surrounded by a 0.3 mm thick Ti-tube, suggesting that the non-oriented heating property will be achieved for the prototype ablation needle coated with a Ti layer having the optimum thickness.
Abarca-guerrero Lilliana - One of the best experts on this subject based on the ideXlab platform.
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Trazabilidad de la varilla de acero para construcción #3 en ArcelorMittal Costa Rica
'Instituto Tecnologico de Costa Rica', 2020Co-Authors: Vásquez-granados Alberto, Abarca-guerrero LillianaAbstract:The construction industry aims to transform raw materials into semi-finished or finished pRoducts. Within this is the Steel industry to which major environmental impacts are attributed due to the intensity of use of resources during their raw material extraction, pRoduction processes and alike. To determine those impacts some methodologies are available such as Life-Cycle Assessment (LCA), which allows quantifying and assessing the potential environmental impacts associated with processes or pRoducts during stages of its existence. In the present study, the traceability of construction Steel Rod #3 was determined in ArcelorMittal Costa Rica for the stages of pRoduction and transportation of raw material and pRoduction and transportation of the Steel Rod. An inventory of inputs and outputs of each stage of the life cycle was created which was evaluated by SimaPro 8.2.3 software, using the Ecoinvent databases. The results of the life cycle impact assessment (LCIA), revealed that the greatest impacts of the entire system occurred at the stage of Steel ingots pRoduction due to the raw materials. It was also determined that during the transport stage, the use of the train generates more impacts than the transport by boat per kilometer transporting a ton of material. For the Rod pRoduction phase, the biggest impacts associated are related to the gas emission from the furnace chimney. Finally, in the transport of the Steel Rod showing proportionality, more fuel is consumed when greater weight is transported.La industria constructiva transforma materias primas en pRoductos elaborados o semielaborados. Dentro de ésta se encuentra la industria del acero, a la cual se le atribuyen grandes impactos ambientales por la intensidad en el uso de recursos durante su proceso pRoductivo. Para determinar dichos impactos existen hoy día metodologías como el Análisis de Ciclo de Vida (ACV), que permite cuantificar y evaluar los impactos ambientales potenciales asociados a procesos o pRoductos durante las etapas de su existencia. En el presente estudio se determinó la trazabilidad de la varilla de acero para construcción #3 en la empresa ArcelorMittal Costa Rica, en las etapas de pRoducción y transporte del lingote de acero y la pRoducción y transporte de la varilla de acero. Se creó un inventario de las entradas y salidas de cada etapa del ciclo de vida y se evaluó mediante el software SimaPro 8.2.3, empleando las bases de datos de Ecoinvent. Con la evaluación de impacto de ciclo de vida (EICV), se obtuvo que los mayores impactos se pRodujeron en la etapa de pRoducción del lingote de acero, como consecuencia del uso de materias primas vírgenes. Durante el transporte del lingote se determinó que el transporte en tren genera más impacto que el transporte en buque por kilómetro recorrido transportando una tonelada del material. Para la etapa de pRoducción de la varilla los mayores impactos se asocian a la emisión de gases desde la chimenea del horno. Finalmente, en el transporte de la varilla se demostró que a mayor peso transportado se consume más combustible, por lo que existe una proporcionalidad
