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在批林批孔运动的推动下,1974年以来,河北铜矿大力开展了以选矿技术改造和自动化为课题的群众性技术革新活动,并同北京矿冶研究院等单位组成三结合小组。通过大家的共同努力,于1975年1月在磨矿系统安装了球磨机恒定给矿和给矿机自动互换控制装置。经过近一年的生产运行考查,系统比较稳定,效果较好。它不仅保证球磨机每小时给的矿量一定,而且当甲料仓没矿时还能自动开乙料仓的给矿机,乙料仓没矿还可以自动开丙料仓的给矿机,
Driven by the pro-Lin Pok campaign, since 1974, Hebei Copper Mine has vigorously conducted mass technological innovation activities focusing on the transformation and automation of beneficiation technology and has formed a three-in-one group with Beijing Research Institute of Mining and Metallurgy. Through the joint efforts of everyone, in January 1975 in the grinding system installed a constant feed mill and mine machine automatic exchange control device. After nearly a year of production run test, the system is relatively stable, the effect is better. Not only does it guarantee that the amount of ore per hour given by the ball mill is constant, but also when the silo does not mine, it can automatically open the silo to the ore silo. The silo with no silo can also automatically open the ore silo to the silo,