High-quality silicon brick manufacturers will tell you about the reasons for the cracking of silicon bricks

High-quality silicon brick manufacturers will tell you about the reasons for the cracking of silicon bricks

High-quality silicon brick manufacturers: analysis of cracking causes of silicon bricks

In the production process of silicon bricks, from raw material selection to sintered products, cracks may occur in every unreasonable link. The sintering and molding process are important factors affecting the generation of cracks, but the role of other factors cannot be ignored. Let's take a look with the manufacturer.

1. Among the selected raw materials, if there are many rapidly changing silica, improper sintering control will easily lead to cracks, and the grain size of silica will also affect the formation of cracks. If the particle size is large, the sintering expansion will be large, and the rotation will be large. Slow, the product is easy to crack. Reasonable selection of mineralizers and appropriate addition of waste silica bricks can reduce the sintering expansion and crack formation of adobe.

2. There are too many coarse particles during batching, and cracks will appear around the particles during firing. The structure of bricks is difficult to densify, local cracks are prone to occur, and it is difficult to make products with smooth surfaces and neat edges and corners, but adding fine powder is beneficial to reduce the sintering of bricks. Expansion, cracking and volume change to improve yield.

3. The mixing of raw materials is uneven, and the expansion of each part of the blank during firing is uneven, which will lead to cracks; too much moisture in the blank will also cause peeling.

4. It is easy to produce cracks if the molding control is not good. In theory, the vibration molding will not produce peeling. As long as you pay more attention to demoulding, there are few other cracks. However, when producing products in large quantities in China, machine molding and double-sided pressing are often used to reduce the layer density. The pressure system of light first and then heavy is conducive to gas removal, which can reduce peeling. Repeated pressing has a higher density and lower layer density than one pressing, which can reduce vertical cracks. Unreasonable fabrics will produce serious density. Uneven, resulting in a significant increase in various cracks. When making fabrics, the materials of the corners, grooves, and tongues are difficult to reach naturally, and the pressing force is small, and there are often more fabrics. Some places even need to be tamped and compacted in advance.

5. Unreasonable work in progress drying system can also lead to cracks; if these cracks cannot be detected after drying, they will continue to spread during the firing process.

6. Unreasonable work in progress loading system will also lead to increased cracks; for example, special bricks need to be installed inside, and standard ordinary bricks need to be installed outside; the protruding part of the brick or the part that is prone to cracks is inward; the top of the kiln car should be covered with some thin bricks to avoid the direct impact of the flame, otherwise it will lead to more cracks. The physical and chemical changes of refractories during the firing process are an important basis for determining the firing system. An unreasonable firing system will lead to a large number of cracks, but even if the firing system is reasonable, due to the kiln structure, charging method, actual air volume, brick variety, specific operation, etc Due to the influence of factors, the actual firing system will also be different from the theoretical firing system.

The editor of high-quality silicon brick manufacturers will explain here today. Thank you for watching. If you need to customize silicon bricks, you can contact our high-quality silicon brick manufacturers.