If the phosphate brick is used for the lining of the rotary kiln, as long as the reasonable size is calculated based on the diameter of the kiln lining, it can be either axe shaped or fan shaped.
According to the current market usage of bricks, axe shaped bricks account for a relatively large proportion, while fan shaped bricks are not widely used. Generally, fan shaped phosphate bricks are mostly used in white ash rotary kilns, while fan shaped bricks are almost not used in other rotary kilns.
However, whether it is fan shaped or axe shaped, the key to the long service life of phosphate bricks lies in the reasonable brick size and rigorous masonry. It's just based on the usage habits of the manufacturer. If using axe shaped bricks, 2-3 types of joint bricks should be designed for each ring of bricks. The size of the main brick of the joint steel plate can be reduced by 10mm in length and width.
Fan shaped bricks are used in phosphate kilns for white ash rotary kilns, but they are not very common. If fan shaped bricks are used, there is no need to insert joint bricks. To a large extent, during masonry, one brick will be cut into each ring to build a circle. The joint is made when masonry reaches the kiln head or when changing the brick material, and it needs to be 10-20mm thinner than the main brick fan surface brick. In other words, two different thicknesses of phosphate bricks can be used in the last two rings of bricks, and the masonry can be squeezed tightly. However, the inner and outer rings of the fan-shaped brick have different curvatures, but the curvatures are not large and may differ slightly from those of axe shaped brick masonry.
When using phosphate bricks as the lining for rotary kilns, whether it is axe shaped bricks or fan-shaped bricks, the kiln body should be inspected for good masonry. The joint steel plate should be inserted tightly according to the rotation and looseness during kiln inspection, which is also an important step. Kiln inspection cannot be ignored to reinforce the phosphate bricks lining inside the kiln body and prolong the service life.
So, the quality of phosphate bricks used in rotary kilns is the most important, and it has little to do with the type of bricks used. As long as the size of the bricks is reasonable, it doesn't matter what type of brick is used.
HOME