A research team led by Kim Kang Su, vice-dean of the Faculty of Shipbuilding and Ocean Engineering, has designed and constructed a multi-purpose ladder-dredger.
Several kinds of multi-purpose dredgers are being used all over the world for river and coast improvement, ecological environment protection and prevention of flood damage.
The dredger they have newly constructed works with several dressing machines and discharging equipment for different purposes ― a excavator bucket, a drum screen, a washer, a concentrator, discharging equipment, anchorage posts and elevators.
When the sands and gravels are dropped down from the bucket, they are separated individually while being washed by the water from a pump. The separated sands are transported into the concentrator and the gravels are conveyed to the ship by the belt conveyor.
The concentrator separates high density ores from the sands by using the jig. The separated sands are moved through the drain into the transfer tank and loaded on the ship by the bucket-type conveyor and the belt conveyor.
When working, the dredger holds its position and posture by 2 fore anchors and 1 aft anchor.
All the equipment is comprehensively controlled in the control room.
The multi-purpose ladder dredger will keep the environment cleaner for river improvement, thus contributing to the prevention of flood damage.
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