How to deal with the problem of dimensional deviation caused by inaccurate sand molding of large cast steel parts slag cans?

2024-08-14 13:49:10

large steel castings - slag tanks are used in the metallurgical industry for the temporary storage and transportation of slag in blast furnaces, converters, and other smelting furnaces. When casting such a large equipment, the size requirements are strict. However, the problem of dimensional deviation caused by inaccurate sand molding often occurs. So how do manufacturers deal with it?

The casting process of slag cans includes steps such as sand casting, melting molten steel in a furnace, pouring, cooling, demolding, and subsequent processing. Every step is important, and any deviation may result in non-standard dimensions or even defects, affecting the performance and lifespan of the slag tank.

To avoid dimensional deviations caused by sand molding, start with sand mold design and preparation. The design of large steel castings - slag tank sand molds needs to consider factors such as metal shrinkage rate, fluidity during casting, and cooling rate. Advanced computer-aided design software can be used for simulation analysis, prediction, and correction of possible deformations and deviations during design.

The control of furnace materials is also important during the casting process. To ensure that the molten steel has the appropriate temperature and composition, and to reduce dimensional errors caused by solid shrinkage during pouring. In the cooling and solidification process, it is necessary to prevent deformation deviation caused by internal and external stress due to non-uniform cooling.

Slag cans that have already experienced dimensional deviations can be corrected for some minor deviations in large cast steel parts through post-processing techniques such as heat treatment, mechanical processing, etc., to improve product accuracy and surface smoothness.