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1971年7月,我矿日处理300吨铜浮选厂建成投产,以石灰作矿浆pH值调整剂和非目的硫化矿物抑制剂。由于石灰添加方法落后,添加数量无法严格控制,多加泡沫发粘,浮选难以进行,少加犹如清水,汽泡矿化效果很差,浮选机刮板刮清水,选矿回收率只有88%左右,精矿品位15—18%。1980年选矿处理能力扩大到500吨/日,将石灰人工控制添加改为机械可调定量自动添加,用时间继电器控制石灰添加小车的往返频率,从而控制石灰干粉的添加量。改进后,石灰添加均匀稳定,劳动强度大为降低。但是,由于没有仪器监测和控制石灰的有效添加量,矿浆pH还得靠人工用试纸测
July 1971, I mine processing 300 tons of copper flotation plant was completed and put into operation, with lime as a pulp pH adjusting agent and non-target sulfide mineral inhibitor. Due to the backward adding method of lime, the added quantity can not be strictly controlled, the more the foam is sticky, the flotation is difficult to carry out, the less like water, the bubble mineralization is poor, flotation scraper scraping water, beneficiation recovery rate of only about 88% , Concentrate grade 15-18%. 1980 beneficiation processing capacity expanded to 500 tons / day, the manual control of lime added to automatically adjust the amount of mechanical adjustable, with a time relay to control the frequency of lime to add the car to control the amount of lime powder added. After the improvement, the addition of lime is stable and the labor intensity is greatly reduced. However, since there is no instrument to monitor and control the effective addition of lime, the pH of the slurry has to be measured manually