High temperature change of quartz ramming mass material 石英砂捣打料高温变化

石英砂捣打料高温变化

石英砂在573°产生晶体转变，发生体积膨胀， 577°，硼矸与石英砂形成玻璃相，表面釉化 。

870°，石英砂开始第二次晶体转变，体积，膨胀量持续放大。

1470°，石英砂晶体转变完成，体积增大5% 。

石英砂捣打料在这整个烧结和热传导过程中，形成烧结层，半烧结层和松散层。半烧结层从870度逐渐向烧结层过度。

于此同时，在高温下，石英砂体积明显变化，高温气孔率增加，体积稳定性变差，导致整体出现明显开裂，烧失后，产生明显收缩，剥落等。影响整体炉龄。

High temperature change of quartz ramming mass material

Quartz sand produces crystal transition at 573°, occurs volume expansion, 577°, boron gangue forms a glass phase with quartz sand, surface glaze.

870°, quartz sand begins the second crystal transition, volume, expansion amount continues to enlarge.

At 1470°, the quartz sand crystal transformation was completed, and the volume was increased by 5%.

During the whole sintering and heat conduction process, the sintering layer, semi-sintering layer and loose layer are formed. The semi-sintering layer gradually excessive from 870 degrees to the sintering layer.

At the same time, under high temperature, the volume of quartz sand changes significantly, the high temperature stomatal rate increases, the volume stability deterior, resulting in obvious overall cracking, burning loss, obvious shrinkage, peeling and so on. Affect the overall furnace age.