|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||NOW ON-DEMAND ONLY – Strategies for the Upgrade of a TBZC Product (Tetra Basic Zinc Chloride) by Selective Removal of the Impurity Chlorine
||Lukas Hoeber, Thomas Hofbauer, Rana Ahmed, Stefan Steinlechner
|On-Site Speaker (Planned)
When recycling materials containing zinc in hydrochloric acid processes, the precipitation of zinc can lead to the formation of various compounds which can be assigned to the group of zinc hydroxide chlorides. This research project aims to compare different approaches for the selective removal of chlorine as an impurity to obtain a cleaned zinc product from these materials. The removal of chlorine via soda leaching at atmospheric conditions as well as under overpressure in an autoclave was investigated. Furthermore, concepts were considered in which the chlorine can be evaporated and thus separated via selective temperature and atmospheric control. Thereby, a focus is on the simulation of pyrohydrolysis and clinkering for the separation of chlorine in gaseous compounds whereby zinc remains and can be brought to further processing. The simulations with multivariant parameters are carried out using the thermochemical calculation software packages FactSage and HSC Chemistry.