Some Detailed Information About Rotary Kiln

Descripción

According to the motion state of the material bed and the relation between the motion state and the number of guidelines, the rotating speed of the rotary kiln will increase with the increase of the guideline number. The material bed will slide off, fall off, rolling off and throw off. The material layer in the rotary kiln can be divided into the inactive layer and active layer. For the most of the part of the bed layer of the rotary kiln, namely the inactive layer, the particles do the circle movement with the rotation of the barrel of the cement rotary kiln. There is no mutual motion between the particles. The experts of Henan Hongxing Mining Machinery have measured the motion speed of the particles in the active layer and the thickness of the active layer. The experts have found that the active layer is a kind of thinner particle layer compared with the inactive layer. The thickness of the general active layer is not more than eight times as the diameter of the particles.

Even when the diameter of the particle is small or the thickness of the bed layer is large, the thickness of the motion layer is not more than 12% of the thickness of the bed layer. For the reaction system with small gas-solid reaction rate, the residence time of the gas in the active layer is shorter than that in the active layer. Therefore, the reaction process of the gas in the motion layer can be ignored. We can only consider the reaction process of the materials and gas in the inactive layer. Then you can get the model for the inactive layer for the transfer process in the lime rotary kiln.If you want to establish model for the mass transfer process in the rotary kiln, you should first know the process occurring on the radial section of the clay rotary kiln.

Then you should regard the radial section of the rotary kiln as the differential elements of the rotary kiln. You can combine with the engineering practice and accumulate axial points along the rotary kiln to get the model for the mass transfer of the rotary kiln in the axial direction. When the material layer of the materials reaches the stable working condition, there will be a slope between the wall of the rotary kiln and the material bed.