European Journal of Engineering and Technology Research

Recovery of Zn from Auger Press Briquettes Made from Steelmaking Sludge

Mon, 06 Nov 2023 00:00:00 -0500

The presence of zinc in metallurgical byproducts poses a constraint on their reutilisation within the realm of ferrous metallurgy. This study delves into the viable prospect of zinc extraction from briquettes manufactured through the auger pressing technique by pyrometallurgical methods. These briquettes are crafted from converter sludge, anthracite, and a multifaceted binding agent. The study encompasses laboratory and industrial trials, spanning the auger pressing technological line, and a tunnel kiln. The consequential outcome of this process yields metallized iron-infused briquettes, effectively purged of zinc content. These briquettes emerge as a propitious raw material option for steelmaking endeavours.

Divergence Structural Analysis of an Aircraft Tapered-Unswept Wing Using Aerodynamic Strip Theory for the Case of Flight at Sea Level

Mon, 06 Nov 2023 00:00:00 -0500

This study investigates the utilize of the iteration of matrix numerically to get the divergence speed of an aircraft tapered-unswept wing via using method of strip theory (without finite span correction and with finite span correction). The 2-D fluid flow across the wing airfoil section is assumed by the aerodynamic strip theory and then integrated over wing span. In the present work, first the tapered unswept wing is divided into four Multhopp’s stations. Then, elastic properties of this wing in relation to torsional influence coefficients related with this four Multhopp’s stations have been evaluated. Second, equations for equilibrium are constructed as integral equations. Then, an appropriate aerodynamic theory in the form of strip theory was addressed, as well as the technique of solution for determining the divergence speed. Finally, using strip theory, the integral equation has been expressed in matrix form. Iteration of matrix has been done using MATLAB environment to reach for the solution to converge. Also, an increase of 15% in torsional stiffness of aircraft wing has been considered to illustrate its effects on torsional divergence speed of aircraft wing. The attained results are going to be helpful in understanding of wing instability for modern aircraft designer.

Construction of a Solar Still Prototype to Reduce Extreme Water Hardness in the Mayan Community Ejido 20 de Noviembre

Mon, 13 Nov 2023 00:00:00 -0500

Available water in natural sources at the Mayan community Ejido 20 de Noviembre presents extreme hardness; it exceeds the maximum limit established by Mexican regulations. Consequentially, the water found in these sources is not suitable for human consumption, a critical use for the villagers in drought seasons when water scarcity is more severe. Therefore, affordable alternatives are required to treat water resources that can be used locally. In this sense, the objective of the research was to develop a solar still prototype in order to test the technology’s performance in water treatment available in the community. The prototype development consisted of 6 stages: still model selection, dimension definition, 3D modeling, material selection, assembly, and prototype testing. The device testing at the community was carried out over a period of 3 days, during which well water with an initial hardness of 3500 mg/l CaCO3 was used. A significant hardness reduction was recorded after the solar distillation process, obtaining values of 119.3 mg/l CaCO3, which indicates that the solar distillation technology serves to reduce the water hardness of the community.