HF Scrubbing Efficiency Research
Although the generation of hydrogen fluoride (HF) gas in the aluminium smelting process is unavoidable, it has been controlled through optimised pot design, operation and most significantly through the design and operation of gas treatment centres (GTC). At the LMRC, we focus on understanding the relationship between various factors and the GTC capacity and efficiency. A dedicated laboratory with a lab-scale GTC reactor has been set up to explore the interaction between alumina and the HF gas. Modern experimental techniques are used to test the different factors that influence scrubber capacity and efficiency. The performance of differently calcined aluminas is assessed against simulated parameters in our HF reactor which is fitted with real-time data collection capability and alarm system for control and safety.
- Adsorptive capacity of and evolution of the pore structure of alumina on reaction with gaseous hydrogen fluoride.
- The pivotal role of alumina pore structure in HF capture and fluoride return in aluminium reduction.
Current doctoral studies underway at LMRC that will further our R&D in HF scrubbing are:
- Mechanisms & kinetics of HF capture smelter-grade alumina (SGA).
- Mechanisms of fluoride regeneration in gas treatment centres of aluminium smelters.
We own and operate a laboratory scale dry scrubbing apparatus which is customizable to meet research needs in this field. We have tested many different refinery aluminas and speciality aluminas. We have capabilities to fluorinate alumina under simulated dry scrubber conditions and customer specifications.