The inner diameter of the kiln is determined by the nature of the calcined product, temperature, and flexibility of the operation. General calcined dolomite shaft kiln diameter of 1.6-2.5m, limestone shaft kiln 2.4-4.0m, cement shaft kiln <2.5m. The height of the shaft is determined by the preheating, calcination and cooling time of the material in the kiln. The KID = H / D is used to characterize the height ratio of the shaft kiln. Cement kiln high diameter ratio of 3 to 4, for high temperature (1650 ℃) calcined dolomite diameter ratio of 6 to 7.6, shaft kiln high diameter ratio of 10 or more.
Shaft kiln liner material requirements of high temperature, less heat, with a certain strength. Vertical kiln kiln lining three layers, the innermost layer for the working layer, the middle of the permanent layer, sub-outer layer for the insulation layer, the outermost layer of steel plate. The preheating zone and the cooling zone require a working layer to withstand wear and heat shock, while the calcination zone also requires high temperature corrosion of the gas.
1,The basic requirements of cloth equipment: equalization kiln ventilation resistance, as far as possible to eliminate or reduce the hole near the kiln hole porosity is too large phenomenon. Reasonable way is the fabric of large pieces of cloth in the center of the kiln, small pieces around, so that the air volume along the section to maintain uniform.
2,The discharge device requirements to ensure that the material when the kiln uniform decline. The relative position of the three zones of the kiln is not destroyed. Commonly used three kinds of discharge device: the tray feeder, disc discharge machine and swing gear roll machine.
3, Ventilation device due to the shaft kiln combustion requires a lot of air, the resulting flue gas also need to be discharged in time. Therefore, it is necessary to set the blast and exhaust device. According to the location of the duct into the kiln body is divided into the bottom of the blast (central blast) and the waist blast (peripheral blast) in two ways. The kiln exhaust system consists mainly of kiln covers and chimneys (natural exhaust), or mechanical smoke.
More information of the Shaft Kiln PLS contact me:
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E-mail：tongjiagroup@163.com
