Brief description of rotary kiln for gypsum calcining

                                      Brief description of rotary kiln for gypsum calcining

The rotary kiln is a thermal equipment for calcining gypsum. Its shape is basically the same as the rotary kiln used for drying or firing cement and lime.Most countries around the world use horizontal rotary kilns, and a few use sleeve-type rotary kilns.There are many types of horizontal rotary kilns, such as continuous horizontal rotary kilns, single and double-body rotary kilns, two-stage rotary kilns, etc.The horizontal type is divided into two types: co-current type and counter-current type, which means that the direction of material and heat flow is the same or opposite.The co-current type uses low-temperature calcined gypsum, while the counter-current type uses high-temperature calcined gypsum.The combustion methods of the rotary kiln in the gypsum powder production line include direct heating (internal firing type) and indirect heating (external firing type and internal heating tube type).Rotary kiln type: small cylinder diameter ≠1.0~1.6m, length 6~12m, feed particle size <20mm.The large diameter is