我们一号小高炉的一号热风炉,从1957年8月投入生产起,到1959年6月17日停炉止,连续使用了677天,风温经常保持640-680℃。这个热风炉所以能够高温长寿,我们认为主要有下列几点原因: (1)安装细致:一般安装管式热风炉,是砌两路砖支承热风管,管子锈结杯口往往露在外面,铸管受热时易弯,有时还有杯口裂漏现象,造成严重的漏风。我们改为五道砖墙,即在直管下砌三道支承墙,将杯口砌入支承墙 One of our No. 1 small blast furnace stove, put into production from August 1957, until June 17, 1959 shutdown, continuous use of 677 days, the wind temperature to maintain 640-680 ℃. The hot stove so long to high temperature and longevity, we think the following main reasons: (1) Installation detail: The general installation of tube stove, is to build two brick hot air duct, pipe rust knot cup often exposed outside, Cast pipe easy to bend when heated, and sometimes the phenomenon of cracked glass mouth, resulting in serious air leakage. We changed to five brick walls, that is, under the straight pipe three support walls, the cup mouth into the support wall