Common problems of cast basalt pipe in design scheme

1. The cast basalt pipe centrifugal fan is mainly eroded by dust vapor and a small amount of erosion. The cast basalt pipe has no great impact. The thickness of the cast basalt pipe marble should be 20 ~ 25mm.

2. When the steam body temperature of the centrifugal fan is relatively high or the temperature change is relatively large, it is specified that the common cast basalt products have good quench and heat resistance characteristics. Especially for centrifugal fans for key and main purposes, each cast basalt jaw plate shall be tested according to quench and heat resistance.

3. The installation structure of cast basalt lining shall adopt the connection method of balanced mastic bonding, plate reinforcement structure reinforcement and anchor bolt tightening. Usually, the balance of the motor rotor of the centrifugal fan is not found well, or the damage of the centrifugal impeller is uneven, which causes vibration during the operation of the centrifugal fan. If the connection of the cast basalt pipe is not stable, it will cause falling down and even safety accidents.

4. When the bending stiffness of the cover of centrifugal fan is insufficient, structural reinforcement measures shall be adopted.

5. When the operating temperature of the centrifugal fan is higher than 200 ℃, the modified silicon balance mastic shall be used as the bonding raw material.

6. After lining the cast basalt, if the gap between the surface layer and the centrifugal impeller is too small during the operation of the centrifugal fan volute, in addition to the cast basalt lining in the design scheme, the specification of the steel casing shall be relatively larger. Although the gap between the two sides of the centrifugal impeller and the casing does little harm to the working condition of the centrifugal fan, from the perspective of installation and maintenance, it shall be ensured that the side gap on each side is not less than 20mm after lining the cast basalt.