If all firebrick masonry is used, dry or wet masonry is generally used. The brick lining and kiln cylinder are required to be reliable concentric, the brick lining is built as tight as possible, so that the top of the brick and the cylinder are considerate and tight, and the adjacent wedge face of the brick in the lining is completely in contact with each other. If dry building, the steel plate driven between the bricks should be minimized; If the brick is wet, the brick seam is 1 ~ 1.5mm. The shape and specification of the brick, according to the diameter of each belt in the kiln, is generally fan-shaped, the bottom arc of the brick is the same as the arc of the kiln body, the thickness is appropriate, can not be too thick, can not be too thin. For dry building, if the quality of the selected refractory is not high, and there are mistakes in masonry, there will often be brick falling and collapse accidents. For wet building, the choice of fire mud or mud is very important, if the bond is good, the use of the lining will be good, so some units from the original dry building to wet building. Now to promote energy saving and environmental protection, rotary kiln in close to the shell are generally built light insulation products ceramic fiber module, and then built heavy refractory products, even the use of wet building is difficult to make the masonry is very strong, so there is a light and heavy composite brick. So far, cement rotary kilns have basically used brick lining, and composite bricks are commonly used in preheating and firing zones. Some cement kilns, petroleum coke kilns, nickel-iron kilns use spray paint or castable construction to form an integral lining.