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在固定式平炉上维护出钢口的工作是非常重要的。维护不好不但容易发生事故(自动出钢或穿漏),而且是炼炉率不能降低的主要原因。出钢口不正常,炉内渣流不尽,炉底便易形成高低不平。在渣处越蚀越低,往往因为一个小坑就要炼炉。出钢口不能太短,至少要保持1.2～1.5米以上。正常出钢口的长度为2.5米。太短即容易发生事故。第三炼钢厂出钢口,经常发生太短的情况,有时新换出钢口,出一炉钢后即因内口塌落出钢口变得又大又短,有时外口很小,内口大旋膛,这样便波追重换出钢口,造成炉炉换出钢口的情况,影响熔炼时间。
It is important to maintain the tapping hole on a fixed hearth. Not easy to maintain not only prone to accidents (automatic tapping or leakage), but also the main reason for the furnace rate can not be reduced. Taphole is not normal, endless slag flow, bottom furnace is easy to form rugged. Erosion in the slag at the lower, often because of a pit will have to furnace. Tapping can not be too short, at least to maintain 1.2 to 1.5 meters or more. Normal tapping hole length of 2.5 meters. Too short that is prone to accidents. The third steel mill tapping, often too short, and sometimes for a new exit, out of a furnace after the collapse of the mouth because of the mouth becomes large and short, sometimes outside the mouth is very small, Large mouth within the mouth, so that the waves chase for the mouth out of steel, resulting in the furnace for the mouth of the situation, affecting the melting time.