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武钢一米七冷轧厂酸洗机组是由西德引进的,带钢在酸洗槽内的最大运行速度为240米/分。高速的带钢拖过酸洗槽时,主要负荷由四组骑墙石承受。生产工艺要求骑墙石要有良好的耐酸、耐热、耐磨和抗冲击等性能,还不允许划伤带钢表面。由西德引进的酸洗机组采用国外天然石作骑墙石。该骑墙石在正常生产条件下,每3～4年即需更新一次。武钢冷轧酸洗线投产四年以后,发现骑墙石已磨损严重。在此情况下,如不及时解决耐酸石材,将威胁武钢冷轧生产,酸洗线就有停产的危险,造成不可估量的损失。
The pickling unit of the WISCO one-meter seven cold-rolling plant was imported from West Germany. The maximum operating speed of the strip in the pickling tank was 240 m/min. When the high-speed strip is pulled through the pickling tank, the main load is borne by four groups of stone-riding stones. The production process requires a good resistance to acid, heat, wear and impact, and does not allow the surface of the strip to be scratched. The pickling unit imported from West Germany uses natural stone from abroad as a wall stone. The stone wall should be renewed every 3 to 4 years under normal production conditions. After WISCO cold-rolled pickling line was put into operation for four years, it was found that the stone wall has been worn out. Under this circumstance, if the acid-resistant stone is not solved in time, it will threaten the cold-rolled production of Wuhan Iron and Steel, and the pickling line will stop production and cause incalculable losses.