水泥厂球磨机上用的铁球,重7.5 市斤,浇铸时加上3～3.5市斤重的冒口,仍然产生缩孔,废品率平均在35～50％。我厂铸工工人许照南采用离心浇铸法,浇铸设备如附图所示,浇铸后立刻将外浇口堵塞,摇动手把,每分钟70～100转,铁水凝固后就停止摇动。这样改进后,不但不需要加冒口,而且消灭了废品,铁球的组织很均匀,没有丝毫缩孔现象。 Iron ball used in the cement mill ball mill weighs 7.5 kg, plus 3 to 3.5 kg heavy riser when casting, still produce shrinkage, the average rejection rate of 35 to 50%. Our factory casters Xuzun South Centrifugal casting method, casting equipment shown in the figure, the casting immediately after the outer gate plug, shake the handle, 70 to 100 per minute turn, after the molten iron to stop shaking. This improvement, not only do not need to add risking, and the elimination of waste, iron ball organization is very uniform, there is no sloshing phenomenon.