Research project In this project, new knowledge is generated about the heating of calcium-based raw materials with plasma generators, and about the factors controlling the chemical equilibria under these conditions.
This project concerns experimental work in laboratory and experimental rotary kilns, collecting and measuring of data from industry and the development of heat transfer and process models.
The project budget is 36,5 MSEK. Funded by the Swedish Energy Agency, Umeå university, Chalmers tekniska högskola, Föreningen Mineralteknisk Forskning (MinFo), Nordkalk AB, Cementa AB and SMA Mineral AB
Experiments are conducted with and without a plasma. Studies of a stand-alone plasma and a plasma in a rotating experimental furnace gives an increased understanding of changes in how heat transfer from a plasma to the bed material in a full-scale industrial rotary kiln. The evaluation takes place in three static plasma experiments and two experimental measurement periods in which the plasma is compared with a reference case (LPG). The impact of plasma on different bed materials is evaluated through the development of process simulation models using controlled experiments in a laboratory furnace. Varying plasma power (kWel) is studied to understand the impact of scaling. Production data from industrial full-scale is used to study the bed heat treatment and for model validation.
