The use of fired bricks in construction is still very extensive, and in its production, the process of drying wet bricks is very important. Generally speaking, it can be divided into natural wet bricks and artificial wet bricks. Today, we will talk about how to improve the quality of products when using artificial wet bricks for drying.
When the brick body is in the dry state, the temperature of the hot air needs to be adjusted according to the requirements of different raw materials. It should be noted that the temperature of the bricks entering the artificial drying kiln should be higher than the humidity temperature of the gas discharged from the kiln inlet, in order to avoid moisture regain and affect the quality of the bricks as much as possible. The drying sensitivity of various materials in the raw materials also varies, but for a certain raw material, if the change in drying sensitivity coefficient is not significant and is proportional to its plasticity index. So raw materials with higher plasticity index will have a larger drying sensitivity coefficient, making drying more difficult and making fired bricks more prone to cracking.
If the moisture content of the brick blank is relatively high during molding, it will be easier to form, but the subsequent drying process will be more complicated. So in production, it is necessary to consider everything thoroughly, not just one part. In addition, the higher the moisture content of the formed brick, the greater the drying shrinkage, which increases the risk of drying cracks. Moreover, if the moisture content of the formed brick is high, the strength of the brick will become relatively low, and the loss during the kiln will also be greater. So, if the conditions of the brick making equipment permit, it is necessary to minimize moisture as much as possible, which will increase the strength of the brick body and is beneficial and harmless.
The above introduction is about how to improve the quality of fired bricks during the drying process. We can understand that the temperature needs to be controlled well during the drying process, and the amount of moisture in the previous molding process can also affect the drying time.