Rotary kiln, known as the cement plant, which is the heart of cement production process online of main equipment. The appearance of rotary kiln is larger, the diameter size up to 6 m, long approximately 200 meters, and weighs nearly tons, the subject is simplified by steel plate, refractory bricks, within the tilt Angle, through several LunDai installed in several ways of roller, in which the transmission device driver slowly turn the calcination equipment. 
      Rotary kiln role: to the raw material calcined mature powder.
　 Working principle: by the end of the powder to join rotary kiln, because raw with level is a simplified kiln roller Angle installed in (tail height, head low), simplified at transmission device driver to spin, raw in the cylinder body along the circumferential along the axis tumbling at the same time, by moving to kiln head preheater, In kiln head have burner will fuel or coal powder injection into the stove, already lit by the formation of the flame or steam inlet flow, so make to the circumferential along the axis by rolling and preheater to kiln head moving raw in the process of powder in mobile heated calcination, raw powder in calcined occurred in the process of heating and physical and chemical reaction, eventually calcination mature material by kiln head discharged.
　 Classification: of rotary kiln has many categories, according to the different way points can be divided into several categories, such as: according to production means cent, according to the hot replacement device points, according to clinker cooling way points, according to the score, length-diameter according to kiln body geometry points, according to the simplified according to the relay points, even big gear ring and cylinder connection forms points, by driving mode points, etc.