As a matter of fact, there is no standard for how long after the rotary kiln stops, and each factory makes adjustments according to its own actual situation.

First of all, you need to know why you need to rotate after stopping the kiln. This is because the kilns are supported by idlers, and each kiln sets the required number of idlers according to its own length. The number of idlers in metallurgical kiln is less, generally three or four, while the number of idlers in cement kiln is more, with a certain distance between each group. Take metallurgical kiln as an example. Generally, the distance between two groups of supporting wheels is between 10 and 15 meters. With such a long span, the center line of the cylinder is easy to bend downward under the long-term action of self-weight and kiln lining weight. In order to avoid this phenomenon, it is necessary to rotate the kiln regularly.

My experience is that when the kiln is stopped at high temperature, the average 15 minutes turns to 70 ~ 80 degrees within two hours after the kiln is stopped, and it turns to 70 ~ 80 degrees every half hour from two hours to the fourth hour. After that, the time is prolonged and the turning angle is gradually increased. After the temperature in the kiln reaches normal temperature, it is enough to turn it two or three times a day. Why do you want to turn 70 ~ 80 degrees? Many factories like to turn 90 degrees or 180, which can correct the deformation. But I personally think that if you turn it like this, the kiln will actually stay in two or four fixed positions, so use an irregular angle and slowly correct the deformation through repeated turning.

In addition, due to the influence of weather and temperature difference, we can consider the frequency of turning, such as the large temperature difference between morning and evening in summer, heavy rain and so on.