Numerical Analysis of the Effect of Reduction Gas Composition and Temperature on the Quality of Sponge Iron Product

Author(s):  
Bayu Alamsari ◽  
Shuichi Torii ◽  
Yazid Bindar ◽  
Azis Trianto
2007 ◽  
pp. 77-82 ◽  
Author(s):  
D. Nei ◽  
N. Nakamura ◽  
H. Umehara ◽  
P. Roy ◽  
H. Okadome ◽  
...  

2015 ◽  
Vol 816 ◽  
pp. 482-489
Author(s):  
Peter Sivák ◽  
Oskar Ostertag

The improvement of the main monitored technical parameters of the production devices is connected with the optimization of the individual structural components and construction nodes of these devices. Mainly those critical structural nodes of the devices that have a significant impact on the quality of the products manufactured by this device and its service life are studied. This paper briefly presents the results of experimental and numerical analysis of stresses and strains of selected structural components of the injection device, such as the connecting and guiding columns and the adjustable push plate. The relevant analyses of stresses and strains have been connected with the performance of a series of experimental and computer simulations. The results of these simulations then became an important basis for further optimization of selected structural parts of the injection device.


2019 ◽  
Vol 137 ◽  
pp. 01004
Author(s):  
Sebastian Werle ◽  
Szymon Sobek ◽  
Zuzanna Kaczor ◽  
Łukasz Ziółkowski ◽  
Zbigniew Buliński ◽  
...  

Paper present the experimental and numerical analysis of biomass photopyrolysis process. The experimental tests is performed on the solar pyrolysis installation, designed in Institute of Thermal Technology, Gliwice. It consist of the copper reactor powered by artificial light simulating sun. The paper shows the result of the solar pyrolysis of wood. The yield of the main fraction as a function of the process temperature is presented. Additionally the gas composition is determined. The numerical model is prepared in the Ansys Fluent 18.2 software, which allow at the same time for capturing geometry of the real system and easy change of input data. The results indicate that both the product yields (liquid, solid and gaseous) and gas components shares are strongly influenced by pyrolysis parameters and feedstock composition.


Target ◽  
2011 ◽  
Vol 23 (2) ◽  
pp. 251-271 ◽  
Author(s):  
Mehdi Mirlohi ◽  
Joy Egbert ◽  
Behzad Ghonsooly

The study reported here examined the amount and quality of flow experienced by trainee translators while translating different text genres. Flow (Csikszentmihalyi 1975) is an optimal experience, characterized by intense focus, control, interest and skills-challenge balance that leads to enhanced performance on a task. Although investigated in areas such as professional sports, surgery, and music, Flow Theory has not yet been tested in the area of translation. This study aimed at identifying which discourse genre would induce most flow in trainee translators while translating. Fifty-six Iranian English Translation majors studying at the University of Kashan translated three 180-word texts of narrative, expository, and descriptive genres. After each translation, they responded to a Flow Perceptions Questionnaire (Egbert, 2003) in the Likert format to report their perceptions of flow. Using repeated measures ANOVA, the researchers investigated flow differences among genres. The results indicated that flow existed in the translation classroom and that there were significant differences in the flow scores engendered by different genres. To support the findings drawn from the numerical analysis, four participants, selected from the population of subjects from the first phase, were interviewed, and the analysis of the interviews generally corroborated the statistical findings.


1995 ◽  
Vol 406 ◽  
Author(s):  
J. D. Klein ◽  
S. L. Clauso

AbstractAn optical spectroscopy system was configured to monitor several plasma positions at the same time. The system allows monitoring of several points within a single plasma. Magnetron sputtering of YBa2Cu3O7 (YBCO) in a reduction-oxidation (redox) environment provided a process in which both cation and gas species are vital in determining the quality of the product film. Spatial sampling of the sputter plasma defined a disparity in the manner in which Ba and Cu emissions respond to changes in chamber gas composition. Oxygen emissions were found to respond quickly to inlet gas composition while Cu emissions were notably sluggish.


2012 ◽  
Vol 323-325 ◽  
pp. 565-569 ◽  
Author(s):  
Koji Inaka ◽  
Hiroaki Tanaka ◽  
Sachiko Takahashi ◽  
Satoshi Sano ◽  
Masaru Sato ◽  
...  

t is believed that a microgravity environment may maintain ideal depletion zones of protein (PDZ) and impurity (IDZ) around growing crystals and may contribute to growing high-quality crystals. This can lead to an X-ray diffraction data collection of higher resolution with lower mosaicity, because of the better internal order and fewer defects in the crystals when compared to ground-grown crystals. The extent of these depletion zones are dependent on a competition between the diffusion of the molecules in the solution (indexed by the diffusion coefficient, D) and the adsorption of those into the growing crystal (indexed by the kinetic constant, β). If we use the D/β value as an index of the extent of PDZ and IDZ, a lower D/β value is ideal for maintaining PDZ and IDZ. Using experimental results, we could easily obtain the D/β value. When we combined the D/β value with the quality of protein crystals obtained in microgravity experiments provided by Japanese Space Agency (JAXA), we found that the effects of microgravity contributed to obtaining superior crystals especially if the D/β value was less than 3 mm. The numerical analysis of the PDZ and IDZ shows that the radius of the crystal (R) is also related to the PDZ and the IDZ. If the Rβ/D value is large, both the PDZ and the IDZ provide a filtration effect, but if the Rβ/D value is small, only the IDZ does.


2008 ◽  
Vol 23 (5) ◽  
pp. 536-544 ◽  
Author(s):  
Anton E. Bowden ◽  
Heather L. Guerin ◽  
Marta L. Villarraga ◽  
Avinash G. Patwardhan ◽  
Jorge A. Ochoa

2002 ◽  
Vol 122 (2) ◽  
pp. 216-222 ◽  
Author(s):  
Kohei Ito ◽  
Katuyuki Hagiwara ◽  
Hiroyuki Nakaura ◽  
Kazuo Onda ◽  
Hidekazu Tanaka

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