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劳动人民在长期的生产实践中。很早就掌握了重力选矿技术。古代的砂里淘金就是原始的重力选矿方法。据史料记载,两千多年前的汉代,在我国云南人们就开始采用重力选矿法处理锡矿石;清代末年,在我国江西人们就开始采用重力选矿法处理钨矿。跳汰选煤也有百余年的历史,它是重力选煤的主要方法,是选煤厂的重要设备,占选煤量的一半以上。它具有设备结构与工艺简单,单位面积处理量大,操作维修方便等特点。因此,跳汰机广泛应用于煤炭、冶金等行业。几十年来,煤科总院唐山分院一直从
Working people in long-term production practice. Very early mastered the gravity dressing technology. Ancient sand gold mining is the original method of gravity dressing. According to historical records, more than two thousand years ago in the Han Dynasty, people in Yunnan Province of China began using gravimetric dressing to treat tin ore. In the late Qing Dynasty, people began to use gravimetric dressing to treat tungsten ore in our country. Jig coal preparation also has a hundred years of history. It is the main method of gravity coal preparation and an important equipment for coal preparation plant, accounting for more than half of coal preparation. It has a simple structure of the device and process, handling capacity per unit area, easy operation and maintenance and so on. Therefore, the jig is widely used in coal, metallurgy and other industries. For decades, Coal Branch General Hospital Tangshan Branch has been from