|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Hydrometallurgical and Pyrometallurgical Ways to Produce Fine Particulate Magnetite from Red Mud
||Sumedh Gostu, Brajendra Mishra
|On-Site Speaker (Planned)
Red-Mud (Bauxite residue) is a byproduct generated during the Bayers processing of bauxite. Iron is a major constituent in most of the world’s reserves of bauxite residue (3 billion tons). The utilization and value addition of iron in red-mud is a critical measure for economically valorizing the waste and it eases the process of extracting other valuable non-ferrous components in the waste. A gas based reduction was performed to reduce hematite in red mud to magnetite. The magnetite so obtained was not liberated proving it unsuitable for efficient magnetic separation. Additionally, a patented hydrometallurgical process flow sheet to treat red mud slurries was proposed. The proprietary process creates value streams for all the elements present in red mud (Fe, Al, Ti, Ca and REES). A high value nano particulate magnetite is produced. In addition to its environmental friendliness, the process is 50 % less capital and operation intensive compared to parallel process producing fine particulate magnetite.
||Planned: At-meeting proceedings