The RSRC rotary tube furnaces are particularly suitable for processes where continuously running batch material is heated for a short time. The rotary tube furnace is positioned slightly inclined heated-up to the target temperature. The material is then continuously supplied at the upper end of the tube. It passes through the heated area of the tube and falls on the lower end out of the tube. The time of heat treatment results from the inclination angle, the rotational speed and the length of the working tube, as well as from the flow properties of the batch material. Equipped with the optional closed loading system for 5 liter charge material incl. receptacle, the rotary tube furnace can also be used for processes under protective gas or vacuum. Depending on process, charge and required maximum temperature, different working tubes made of quartz glass, ceramics or metal are used. This rotary tube furnace is therefore highly adaptable for different processes.