The roller hearth kiIn, initially developed for table ware, is used now for more elaborate and diverse products. Compared to tunnel kiln, roller hearth kilns do not need the thermal indifferent kiln cars or the heavy lining and the large rail network. The resulting advantage is a considerably shorter firing cycle. Therefore by firing in single layers lower energy consumption can be achieved and less space is required.
Roller hearth kilns are built in modular construction with light brick lining. In addition to further energy savings, roller hearth kiIns offer advantages for assembly.
For firing grinding balls, GKT provide both tunnel kiln and roller hearth kiln. Due to specific advantages compared with tunnel kilns, the market share of roller hearth kilns has increased. Particularly with regard to technical ceramics such as grinding balls, substrates and hard ferrites.
Generally the highest grade of automation can be achieved by using roller hearth kilns. The transportation by rollers enables a fully automaticon-line production by including loading and unloading and connectable buffer systems for unloaded or loaded transport devices.
At present, GKT roller hearth kilns can withstand use for continuous firing up to a temperature of 1650℃.