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介绍了选矿厂采用气体提升器代替砂泵来输送矿浆；设计气体提升器时所须采用的参数；选矿厂采用气体提升器的实例。
Introduced the use of gas riser instead of sand pump dressing plant to transport ore; parameters designed to be used when designing gas riser; gas elevators used in the concentrator example.