Vertical kilns and rotary kilns are important equipment for calcinating materials. In operation, the processes of vertical kilns and rotary kilns are different, the comprehensive analysis of their advantages and disadvantages are as follows:

1. The vertical kiln occupies smaller area and the heat consumption is relatively small; however, due to the complex structure of the kiln, the materials are internally sealed and calcined, and the heating is uneven, and the product has a high over-burning rate, which requires the formation of a type muffle furnace temperature The field effect will greatly increase the activity of the product. The sulfur in the fuel is easy to adhere, and the sulfur content of the product will increase; and due to the requirements of the airflow and pressure in the furnace, it is generally suitable for burning large pieces to ensure the air permeability in the furnace.

2. The rotary kiln occupies larger area and with big heat loss; but the kiln body is simple and air flows smoothly. It is an open calcination system so that the sulfur-containing flue gas can be discharged in time. The sulfur in the fuel is hardly to adhere so that the content in the product can be reduced; Because the material rolls forward uniformly inside, the heating is even, so that the product activity is high. Moreover, the multi-channel burner of the rotary kiln realizes green energy saving, and is suitable for a wide range of raw material size, and is particularly suitable for burning small limestone.

3. The vertical kiln that can produce high active ash is basically introduced from abroad, and its investment level is about every 10 million yuan to produce each 100 tons of active ash per day; when the rotary kiln was introduced from abroad, its investment was greater than that of the vertical kiln, but After domestic digestion and absorption, especially the introduction and digestion of foreign technologies of preheating and cooling, the rotary kiln can be successfully applied to small-scale production, and the investment has also dropped significantly. The investment level is basically similar to that of imported vertical kilns.

4. The vertical kiln has good sealing properties, lower heat loss, and relatively low fuel consumption; the rotary kiln has a large heat loss due to the long cylinder, but after the use of preheating and cooling technology, the heat energy can be effectively used, and its fuel consumption has been It can be reduced to a reasonable level, and the production cost of the product can be effectively controlled.

It can be said that the rotary kiln and the vertical kiln have their own advantages in the operation. During the operation, the user can choose the appropriate equipment according to the actual situation in the operation.