Materials Engineering -- From Ideas to Practice: An EPD Symposium in Honor of Jiann-Yang Hwang: Mineral and Material Processing
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
Monday 2:00 PM
March 15, 2021
Room: RM 41
Location: TMS2021 Virtual
Session Chair: Baojun Zhao, University of Queensland; Yong Shi, Futianbao Environment Technologies
2:00 PM Keynote
Materials Processing: From Ideas to Practice: Jiann-Yang Hwang1; 1Michigan Technological University
The cycle of materials such as metals involved the steps of geological exploration, mining, mineral processing, metallurgy, manufacturing, and recycling. In each of the step, it is achieved by processing materials using energy. Depending on the process and the forms of energy input, products and by-products with various environmental impacts are generated through air, water and solid means. To obtain the most efficient process with the minimum environmental impacts at the best economics is the driving force that continuously pushes the advances of technologies. Variables in the materials, process, and energy are common parameters facilitating the development of ideas. Understanding of the parameters involved in the materials, energy, environmental and economics is the fundamental of a systematic approach. The validity of ideas and its potential to move to practice depend on the soundness of the system. The author reviewed several cases of his research to illustrate their relations.
2:30 PM Invited
Recent Progress in Microwave-assisted Pyrometallurgy at Central South University: Liancheng Wang1; Zhiwei Peng1; Jie Wang1; Wenxing Shang1; Qiang Zhong1; Mingjun Rao1; Guanghui Li1; Tao Jiang1; 1Central South University
Microwave-assisted pyrometallurgy has many distinguished advantages over traditional pyrometallurgical processes. In the past five years, the researchers at Central South University (CSU) has been focusing on the use of microwave energy for intensifying various pyrometallurgical processes for higher processing efficiency, enhanced metal recovery, lower energy consumption, and better environmental benefits. This study reviewed the efforts of the researchers at CSU in microwave-assisted pyrometallurgy for treatment of wastes, with an aim to offer a useful guide for improving the technology.
2:50 PM Keynote
Production and High Ratio Application of Iron Ore Pellets in Shougang: Gele Qing1; Minge Zhao1; Gang An1; Kai Wang1; xiaojiang Wu1; zhixing Zhao1; 1Shougang Group
In order to reduce the fuel rate of blast furnace and promote green development, Shougang Jingtang Steel company has built two straight grate indurating machines with productivity of 8 million tons of iron ore pellets. In this paper, the production technologies of self-fluxed pellets with hydrated lime were studied and successfully produced on the indurating machine. Hydrated lime has a good binder property and decrease the amount of bentonite and obtain low silica pellet. The basicity of pellet is 1.15 and SiO2 content is 2.0%. The low silica self-fluxed pellets were used in the three large blast furnaces with 5500m3 in Shougang Jingtang, the proportion of pellets in burden was increased from 28% to 55%, slag rate of blast furance is decreased from 280kg/tHM to 215kg/tHM, the fuel rate decreased from 500kg/tHM to 480kg/tHM.
3:10 PM
Comparison between Compression Strength of Two Castor Oil Polyurethane Resin Matrix Composites Reinforced with Coconut or Piassava Fiber: Juliana Carvalho1; Jessika Azevedo1; Noan Simonassi2; Felipe Perissé Duarte Lopes3; Carlos Vieira1; 1Universidade Estadual do Norte Fluminense; 2State University of Northern Rio de Janeiro; 3UENF
Composites reinforced with lignocellulosic natural fibers are studied worldwide as a new greener alternative. Among the polymeric materials reinforced with fibers, many can be mentioned, such as panels for sealing, lining, ecological tiles and industrial floors, among them, the High Performance Coating (HPC). The Brazilian standard for HPC, ABNT NBR-14050, dictates that HPC uses epoxy resin as matrix. Therefore, this work had two main objectives, first to determine if it is possible to use a castor oil based polyurethane resin instead of epoxy and to compare the performance of two composite reinforcements, coconut and piassava fibers. The two eco-friendly materials were produced using piassava or coconut fibers as reinforcement both ground (separately) in a knife mill and fibers were added from 10 up to 30% of volume fraction. Generally, the piassava composites presented better compressive strength. However, both composites presented satisfactory standard performance.
3:30 PM
Characterization of Mortars Incorporated with Natural Açai Fiber: Afonso Azevedo; Marcio Barbosa1; Higor Azevedo Rocha Rocha2; Markssuel Marvila2; Sergio Monteiro3; 1Fluminense Federal University; 2Universidade Estadual do Norte Fluminense; 3Military Institute of Engineering
Açai is a fruit widely used in the food and cosmetic industry, and which after its use has its wastes, such as stone and natural fiber, discarded in landfills. The objective of this work is to characterize mortars based on cement and lime, as to their consistency, incorporated air content and water retention, in mixtures with additions of 0 (control sample), 2.5 and 5% of natural açai fiber treated in NaOH solution. The results showed that the addition of 2.5% of the treated açai fiber presented the best properties of the freshly evaluated mortar, because the added açai fiber reduces the microporous of the cement matrix.
3:50 PM Invited
Renewable Energy for Sustainable Mining: Tom Xu1; Jiann-Yang (Jim) Hwang2; 1AGreatE Inc; 2Michigan Technological University
Mining and mineral processing are energy intensive industry which requires access to a stable electricity source. Currently, the electricity generated and procured by mining industry is mostly fossil fuel based either from grid or diesel generators. With rising mineral demand and falling ore grades, electricity demand has been getting even higher, at the same time the industry is facing the pressure of the decarbonization of the world economy to abide by the Paris Agreement to tackle the climate change. In this presentation, an artificial intelligence (AI) enabled electric microgrid comprised of multiple energy sources (solar and wind), will be introduced. Due to the intermittency and variability of renewable energy sources, a diesel generator and a battery based energy storage system (BESS) are also integrated into the microgrid, in order to provide a stable electricity source for mining operation with 24 hours a day and 365 days a year.