The masonry of rotary kilns generally adopts the ring masonry method, and the staggered masonry tools between rings are constructed using pneumatic brick laying machines.
In order to ensure the parallelism between the fire brick masonry and the centerline of the kiln, a line must be set out inside the kiln before masonry. A level or theodolite should be used to draw several reference lines at about 0 degrees, 90 degrees, 180 degrees, and 270 degrees of the kiln (the reference lines are generally divided into equal parts of about 1.5-2m according to the size of the kiln diameter). The length of the kiln should be divided into equal parts on the reference lines as control points for controlling the offset of the brick lining, and the 0 degree point should be used as the reference for bottom masonry
The locking bricks should be tightened with the prescribed locking bricks, and the size of the locking bricks should be staggered from the standard bricks. The iron plates used for locking bricks cannot be used on both sides of a brick at the same time, and must be staggered. The amount of steel plates used should be controlled, and there should be no more than 3 in the same ring as much as possible.
Template production and installation: The template production and installation should have sufficient strength, no deformation, no displacement, no leakage of grout, and the geometric dimensions should meet the requirements of the drawings. Reusable templates should be cleaned and repaired in a timely manner. When installing the template, a layer of machine oil can be brushed on the surface of the template for easy removal, and should not be too much.
Strictly control the amount of water added to the casting material, and the amount of water added should not exceed the limit specified in the material manual. While ensuring fluidity, the amount of water added should be small rather than large. Casting material that has already set or even clumped should not be poured into the mold frame, nor should it be mixed with water before use. The method of "throwing ball" test can be used to easily determine whether the moisture content is appropriate, that is, using your hand to throw a ball of the mixed castable, catching it with your hand, and making sure that the ball does not scatter or flow.
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