It is helpful to better meet the needs of production, to further improve the production efficiency of products, greatly improve the production schedule and the resulting production income. It is an intermediate process of production, it is essential to the progress of the production, is an essential part of production.

 

Key issues to be solved in 2.2.

 

With the development of domestic some large prebaked cell successfully, to develop large aluminum vacuum suction ladle corresponding to meet the needs of production. The key problems to be solved are as follows:

 

(1) bag cover and the bag body sealing and anti deformation measures.

 

(2) lining and suction pipe service life.

 

(3) the determination of the position of the rotating shaft and the calculation of the tilting moment.

 

The methods used by 2.3. to solve these problems

 

The method to solve these problems is:

 

(1) sealing and anti deformation measures of the cover and the inclusion body. For large aluminum vacuum suction ladle, the inclusion of larger diameter, the bag cover and the bag body flange adopts convex concave rabbet sealing, seal for asbestos packing. The bag cover and the bag body is uneven and the inclusion in the lifting of the uneven stress, easy to cause the bag cover and the bag body flange dislocation, resulting in poor sealing. For this problem, on the one hand, to strengthen the strength of the package and cover, both the body and the cover are required to be reinforced. On the other hand, it is necessary to adopt a reasonable sealing method, the cover flange can be embedded into the package flange, forming a double port seal, once the small seal seal failure, can enable a large mouth seal.

 

(2) lining and suction pipe service life. For small aluminum vacuum suction ladle, because of its small diameter and low height, the refractory brick lining, its strength can satisfy the service life for large aluminum vacuum suction ladle, due to its large volume, the lining must adopt castable casting, its strength can meet the service life. Suction pipe belongs to wear parts, in order to improve the service life, can be used to heat the temperature of 900 DEG C for iron casting, and the need for heat treatment, heat resistant iron material Si content can not be too high, in order to prevent fluoride salt and electrolytic bath in a chemical reaction, affect the service life of the aluminum suction pipe.

 

(3) the determination of the position of the rotating shaft and the calculation of the tilting moment. For large suction aluminum vacuum ladle, due to the use of electric operation, from the point of view of safe operation, the shaft position should be higher than the empty bag and the center of gravity.