Solve the Problem of Sulfur-alkali Circulation in Cement Rotary Kiln

During the operation of the cement rotary kiln, faults such as egg accumulation, flying sand, snowman making, and ring formation often occur. These failures not only affect the operation of the kiln but also affect the service life of the lining refractory material. To solve these problems, it is necessary to clarify the formation mechanism of these faults and destroy the formation conditions of the faults, so as to achieve the purpose of high yield, high quality, and low consumption.

Today we will talk about the ring formation problem of cement rotary kilns. The former and the latter are divided into three types. Among them, the most difficult to deal with is the rear ring.

The problem with the sulfur-alkali cycle

The sulfur-alkaline ring is a circle formed in the decomposition zone, which not only contains a large number of volatile components but also contains some characteristic minerals, such as 2c2s?CaSO4 and 2c2s?CaCO3.

The formation mechanism of the sulfur-alkali ring is that a large number of volatile components act as binders. When C2S is stabilized or transformed into 2c2s?CaSO4 and 2c2s?CaCO3, the conversion of β-C2S-γ-C2S will not occur, and there will be no pulverization accompanying the conversion, and there is a sulfur-alkaline cycle.

Therefore, the prevention and treatment methods of the sulfur-alkaline cycle are as follows:

① Control the sulfur-alkali content of raw materials and fuels;

②Slow down the enrichment of sulfur and alkali in the kiln;

③ The sulfur-alkali ring was destroyed by the heating method.