The influence of brick slag on brick quality

We all know that during the process of extrusion, cutting and pushing of the clay strips by the brick machine, brick slag will adhere to the cut hollow brick blanks. If these brick blanks are loaded on the kiln car without being treated with brick slag, it will have an adverse effect on the quality of the bricks fired.

1. After the hollow brick clay strips are cut by the steel wire, brick slag will adhere to the holes of the brick blanks. These brick slags stick to the holes and the edges of the brick blanks, which reduces the porosity of the hollow bricks or causes the edges of the brick blanks to be not smooth. During the drying and baking process, the edges of the hollow brick holes are adhered to brick slag, which blocks the air from flowing into the holes, slowing down the drying speed of the brick blanks.
2.  If the speed of the car is fast, the blanks cannot be completely dried, which seriously affects the quality of the blanks. During the baking process of the blanks, since the oxidation of carbon also requires oxygen to enter the blanks for reaction, the presence of brick slag causes oxygen to react with brick slag first, delaying the time for oxygen to enter the holes, slowing down the baking reaction speed. Due to the incomplete oxidation reaction, the internal black core of the brick increases, affecting the internal stress and compressive and flexural strength of the brick, thus affecting the brick's progress to a higher level. Practice has proved that the reduction of brick slag can improve the quality and output of bricks.