... extraction - iron sand being discharged to shore by sand pump which is driven by diesel engine - wastes being dumped through chuteFeature:Large output, less investment ... , such as : cutter suction dredger , bucket chain dredger , underwater pump dredger , self- propelled dredger , gold panning dredger , iron extracting dredger, iron extracting equipments , sand sieving machines, crusher , weathering ...