Rotary Kiln for Calcining Active Lime Design

For a set of rotary kiln system selection and design, from the technical point of view, should focus on mastering the rotary kiln thermal characteristics based on its thermal characteristics to understand the relevant rotary kiln knowledge.
In the design of rotary kiln device, the first consideration should be that the rotary kiln is compatible with the calcined material. Among them, the material balance and heat balance, rotary kiln design is the basis. Per unit area of production indicators, is one of the important basis of rotary kiln design.
While the ratio of the length and the diameter of the rotary kiln (L / D) is better able to reflect the thermal characteristics of the rotary kiln. As the length and diameter of the rotary kiln cylinder have a direct effect on the calcination effect, there are different convective heat transfer conditions and different heat transfer effects.
With the development of active lime calcination process, according to the nature of the active lime products, the kiln type with shorter length and larger diameter of the kiln is widely used in the selection of calcined active lime rotary kiln.
In 1978, the first set of rotary kilns with vertical preheaters and vertical coolers introduced from the German company of Klaus Maffei, for example: the choice of the material of the rotary kiln cylinder, the thickness of the steel plate for the 20-40mm, numbered MRST37.2 steel plate for the material. The connection between the kiln body and the large ring gear is connected to the spring plate according to the need for heat and expansion.
The basic conditions for the installation of kiln body, should be based on design requirements, to kiln center line and the center of the two wheeled wheel angle of 60 °, the best condition. The number of wheel sets should be set in consideration of the length of the kiln and the material requirements of the kiln.

Material in the rotary kiln movement form, is not taking into account the material particles in the rotary kiln wall and the material inside the sliding and the size of the impact of the material with the kiln body rotation, a point of the material due to the role of friction, along the kiln wall slowly rising. When the material surface and the horizontal plane of the angle, equal to the material angle of repose, the material particles under the action of gravity, will slide down along the surface layer. As the rotary kiln has a certain degree of inclination, the original material at the point, A will not fall into place, but move forward for some distance, fall at point C. And then from the C point to the D point again, the second fall to the E point. So keep moving forward, is the ideal state of material movement in the kiln.