我厂 X-75kW 箱式炉经常用于退火、正火和调质等处理,由于工件进出炉频繁,搁砖很易损坏,每年需调换数百块;同时阶梯砖的间距也渐渐变大,易使搁砖脱落而使电热丝滑出损坏。为此,我们在两侧墙的底层搁砖下面平砌两层轻质耐火砖(见示意图),以保护搁砖和电热丝。六年来,几乎没换过搁砖,阶梯砖的间距也基本保持不变。另外我们在耐热铸钢炉底板上加装一块8mm 厚 Our factory X-75kW box-type furnace is often used for annealing, normalizing and quenching and other processing, due to frequent entry and exit furnaces, the brick is very easy to damage, need to exchange hundreds of blocks each year; the same time, Easy to make the brick off the heating wire slip out of damage. For this purpose, we lay two lightweight refractory bricks (see illustration) below the bottom brick on both sides of the wall to protect the brick and the heating wire. In the past six years, almost no replacement brick, ladder brick spacing remains basically unchanged. In addition, we installed a heat-resistant cast steel furnace floor 8mm thick