... , large production capacity, less investment and quick effect and so on. It is an advanced mining and selecting joint equipment of ... method to dig up material (sand, gravel, dirt, etc.) using steel "buckets" on a circular, continuous, steel "bucketline" at the front end ... of the dredge. The material is then sorted/sifted, using water. On large gold dredges, the buckets dump the material into a ...