Date: Thursday, February 21, 2019
Time: 12:00 p.m.
Title: Modification of Pellet Porosity for Mn Processing in High Mn Steel Production
Presenter: Xi Ling (MASc Candidate)
Supervisor: M. Barati
High manganese steels with >10% Mn combine high tensile strength and good ductility, two critical properties for automobile design. Conventional routes to produce metallic Mn materials used for steelmaking are mostly energy- and capital-intensive. Therefore, an alternative methane solid-state reduction process is under investigation. This process operates at lower temperatures than conventional routes and replaces expensive coking coal with natural gas. However, during the translation of this technology from mg-scale loose powder to g-scale ore pellets, an essential step in industrial application of this process, ineffective diffusion of reaction gases through the ore pellets was observed that limits the reduction rate and extent. This project aims to improve the reducibility of Mn ore pellets by modifying their porosity through adjusting Mn ore powder particle size and through adding , which thermally decomposed at reduction temperatures to and gas. It was found that while the increase in porosity as a result of addition has a positive effect on the reducibility of pellets, porosity modification by adjustment of particle size is complicated by the simultaneous change in the total surface area of the particles. Future work on larger addition, is laid out for a better understanding on the influence mechanism of porosity on reducibility.