Normally, there are many factors which will influence the production efficiency of cement rotary kiln, the rotating speed is proportional to the filling rate. If the filling rate is too large or too small, rotating speed of cement rotary kiln will be seriously influenced, even causing badly operating performance. So the material feeding rate should be adjusting reasonably. Then what are the normal standards for indicators of cement rotary kiln?

Under the cement manufacture processing, on pre-heating and calcining operating section, the lower material filling coefficient of decomposing furnace will be with higher heat furnace value. While filling rate is smaller, heat value in furnace is bigger, absorbed heat capacity of material is smaller, which cause temperature of furnace is too high and capacity strength is reduced, vice versa. Therefore, the feed rate should be controlled within a certain range according to production capacity and primary parameter of system. Contemporarily, the modern large scale cement production line will always settle with whole set of PLC or DCS full process control system, which can be realize the remote automatic control. Consequently setting the material ratio in advance in the system before operating, will normally filling in the optimum proportion into control system, then through data analysis catching from indicator on the kiln inlet which can indicating the site current feeding condition, combining with the system automatic material feeding volume adjusting function, finally will realize high efficiency and high quality cement clinker producing.

Generally speaking, the material filling speed and rotating speed of cement rotary kiln will be controlled according to the thickness of kiln shell, also will adopting properly material loading ratio. The feeding speed of feeder should be matching with kiln speed, which will guarantee the evenly material layer inside kiln. For the adjustment of decomposition furnace filling rate, we should judge from two aspects, that is condition in kiln and working condition of decomposition furnace. The feeders settled behind the decomposition furnace should be changed according to kiln speed. When the kiln speed changes, the feeders should be keep the kiln material layer is generally uniform, which is conducive to overcome the disturbing elements. As for the resulting furnace shake, in case of the material stay in the furnace for a short time, heat transfer rate quicker than the rotary kiln conditioning, can quickly overcome the disturbing elements.

Strict control of the cement rotary kiln raw material feeding volume, we can ensure the discharge quality of rotary kiln clinker. When the amount of feed is not appropriate, we should adjust the feeding volume.

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