No matter it is knot type furnace lining or fabricated furnace lining, when for long time working under the high temperature it is certain to change (mainly is expansion and contraction or oxidation).
不管是打结式炉衬，还是装配式炉衬，长期在高温下工作都会发生变化（主要是热胀冷缩和氧化）。
2
On this base, the formula used for calculating the side pressure of ring wall, ring tensile and temperaturecontraction stress is established for engineering design.
在上述基础上提出的环墙侧压力、环拉力和温度收缩应力的计算公式，可供工程设计中采用。
3
After analysis, the major affecting factor of alloy fluidity and body contraction are compositions, pouring temperature and the inclusions of alloy.