Materials Engineering -- From Ideas to Practice: An EPD Symposium in Honor of Jiann-Yang Hwang: Material Processing and Recycling
Sponsored by: TMS Extraction and Processing Division, TMS: Materials Characterization Committee, TMS: Pyrometallurgy Committee
Program Organizers: Bowen Li, Michigan Technological University; Baojun Zhao, Jiangxi University of Science and Technology; Jian Li, CanmetMATERIALS; Sergio Monteiro, Instituto Militar de Engenharia; Zhiwei Peng, Central South University; Dean Gregurek, RHI Magnesita; Tao Jiang, Central South University; Yong Shi, Futianbao Environment Technologies; Cuiping Huang, FuTianBao Environment Protection Technology Company Ltd.; Shadia Ikhmayies, The University of Jordan
Wednesday 8:30 AM
March 17, 2021
Room: RM 41
Location: TMS2021 Virtual
Session Chair: Tom Xu, AGreatE Inc; Yongguang Luo, Chi Hong Zn & Ge .Co,Ltd
8:30 AM
Investigation of Nickel Laterite Smelting Slags: Ender Keskinkilic1; 1Atilim University
Pyrometallurgical nickel extraction has been extensively preferred for treatment of saprolites and it becomes a good alternative even for limonites when the nickel prices go down as today's values like $13/kg, which makes the hydrometallurgical route uneconomical. Composition of iron-nickel alloy slags is mostly dependent on ore type. Certain ternary systems have been under consideration while analyzing smelting of saprolitic ores. Among them, FeO-SiO2-MgO system is the most commonly used one. On the contrary, smelting of limonite type ores bodies has been mostly expressed by FeO-Fe2O3-SiO2 system. In the extent of current work, some examples to slag systems of high temperature nickel extraction processes as rotary kiln-electric furnace (RKEF), low-grade ferronickel (so called nickel pig iron), etc. will be outlined together with their certain metallurgical properties.
8:50 AM
Recycled Common Glass Bottle Used in Composite Repair for Industrial Piping: Felipe Perissé Duarte Lopes1; Noan Tonini Simonassi1; Carlos Fontes Vieira1; Sergio Neves Monteiro1; 1Universidade Estadual do Norte Fluminense
The corrosion issues in the industrial piping is a big problem in centuries; usually in the industry these piping are located in danger zone, where it is not allowable repairs using any heating sources. Recently the uses of cold repair by composites materials is increasing. Usually modified epoxy resin with high viscosity is used reinforced by fiberglass fabric. In this work, a commom epoxy resin with recycled glass powder from disposed bottles was caracterized thermally by dilatometry testing and mecanically compressive testing, to be a alternative for expensive modified epoxy resin. The results shows that addition increase the transition glass temperature and also the compressive strength, comparing to a commom resin epoxy. In this study, was possibel to recycle a glass bottle e save money, around 70%, in cold repair for industrial piping.
9:10 AM
The Effect of the Diameter on the Density of Ubim Fiber: Belayne Marchi1; Sergio Monteiro2; Veronica Cândido1; Raphael Reis1; 1Instituto Militar de Engenharia; 2Instituto Militar de Engenharia
The production of synthetic materials is highly polluting, process that motivate the search for new natural or alternative materials, which offer properties similar to synthetic ones. In particular, the use of natural lignocellulosic fibers (NLFs) is an alternative to or replace synthetic components, and to reinforce composite materials for engineering applications. NLFs stand out for being biodegradable, non-polluting, have low cost of cultivation, in addition to being lighter than synthetic fibers, being a substitute for these components, with similar mechanical properties. In this article, a NLF still unknown, the ubim fiber (Geonoma baconiferous), will be analyzed statistically in terms of diameter in relation to its density, using the Weibull method for future applications in engineering composites. In conclusion the ubim fibers have a high density (2.4g /cm3) compared to other natural fibers. Moreover its density displays little change with the diameter within the 240 to 320 um interval.
9:30 AM Invited
Effect of Temperature on the Leachability of Chromium in EAF Slag: Ya-Jun Wang1; Jun-Guo Li1; Ya-Nan Zeng1; Zhi-Yuan Gao2; 1North China University of Science and Technology; 2Tangshan research academy of environmental planning
The objective of this study is to evaluate the effect of temperature on the leachability of chromium in EAF slag. Mineral phase identification and micromorphology analysis were used to study the distribution of chromium in the EAF slag and the leaching residue. Sequential leaching tests were performed to study the chromium leachability in EAF slag under different temperature. The results show that the chromium in the EAF slag was mainly present in the Mg-Cr spinel, Fe-Cr alloy, or distributed in the form of oxide in the matrix phase-merwinite. In the sequential leaching process, the leachates under various were all alkaline and reductive. The release rates of chromium could reach their equilibrium values when the leaching time reached to 48 hours, and the trivalent chromium was the predominant speciation of chromium in the leachates. The leachability of chromium in EAF slag decreased gradually with increasing temperature.