Powder Technology, Vol.377, 274-280, 2021
Novel dry-suspension granulation process for preparing pressed powders of ceramic tiles
Herein, we propose a novel dry-suspension granulation process and compare it with the conventional spray granulation process used in the ceramic industry. The proposed granulation process, which is based on dry grinding, uses airflow as the driving force and raw material particles combined with atomized water, bonded together within a humidifying chamber. Then, this mixture is reformed and separated inside a cyclone to prepare the pressed powders. The results showed the novel process can effectively prepare powders, with less energy and water required than that by the wet granulation process. Under the current working conditions, the receiving rate was 87%, the water content of the product was 5.8%, and 63% of the particles were bigger than 0.2 mm. Both the fluidity and compressibility were able to meet the basic requirements for pressed powders in industrial production. Therefore, this proposed process can be expected to be widely used in ceramic tile production in the future. (C) 2020 Elsevier B.V. All rights reserved.