这一段时期,上海各转爐炼鋼厂的转爐寿命下降很多,主要原因是由原来的鎂砂爐衬改用白云石爐衬,白云石的焙烧、制砖等工艺还沒有很好掌握。同时,許多厂片面追求提高爐产量,在新爐砌好后就大量超装铁水(和爐龄末期装同样多),违反了操作规程中关于装入角的規定,使爐衬受到过大的损伤。有些厂为了提高鋼水温度和脫硫,把吹炼时間拖得很长,实行正常操作所不許可的“后吹”,也大大加剧了爐衬的侵蝕。上鋼六厂建立了白云石工段的严格检查制度,对成品砖进行尺寸和重量的检查,保証了它的正确外形和密度,使砌成的爐衬尽可能致密。他們限制了转爐的装入量,特別是爐龄前期的装入 During this period, the life span of converters in Shanghai’s converter steel mills dropped a lot, mainly due to the fact that dolomite linings were replaced by dolomite linings, dolomite roasting and brick making processes were not well mastered. In the meantime, many factories, in their pursuit of increasing furnace output, oversupply molten iron after the completion of new furnaces (as much as the end-of-furnace installation), in violation of the rules on loading angles in the operating instructions, damage. Some plants in order to improve the temperature and desulphurization of molten steel, blowing the blowing time is very long, the implementation of the normal operation is not permitted “after blowing”, but also greatly exacerbated the erosion of the lining. On the steel six plants established dolomite section of the strict inspection system, the finished brick size and weight checks to ensure its correct shape and density, so that the lining of the brick as dense as possible. They limit the loading of the converter, especially for pre-incineration