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Dredgers

Dredger is an earth-moving machine intended for rock dredging lying under water and their transportation as a part of a hydromixture (slurry) to a dump or a concentrating plant. The dredger consists of a soil pump, a dredge head, hoists, slurry pipeline, as well as control and regulating equipment, and emergency system. The soil dredging is carried out with preliminary ripping by special devices: mechanically (most often a mill cutter or a rotor engine) or hydraulic.

Comparison tables

8 inch 10 inch 12 inch 18 inch 20 inch 22 inch 32 inch
Pump flow 400 cbm/h 800 cbm/h 1400 cbm/h 1600 cbm/h 2000 cbm/h 3000 cbm/h 4000 cbm/h
Pump capacity on dry soil 80 t/h 160 t/h 280 t/h 320 t/h 400 t/h 600 t/h 800 t/h
Pump slurry head 40 m - 70 m 40 m- 70 m 40 m- 70 m 40 m- 70 m 40 m- 70 m 40 m- 70 m 40 m- 70 m
Maximum dredging depth 25m 25m 25m 25m 25m 25m 30m
Slurry transportation distance 1200 m 1200 m 1200 m 1200 m 1200 m 1200 m 1200 m
Suction / discharge pipe diameter 8 inch 10 inch 12 inch 18 inch 20 inch 22 inch 32 inch
Board height 1 m 1,2 m 1,5 m 1,5 m 1,5 m 1,8 m 2,0 m
Suction ladder length 14 m - 30 m 14 m - 30 m 14 m - 30 m 14 m - 30 m 14 m- 30 m 14 m - 30 m 14 m - 30 m
Engine power - minimal 105 kWt (143 h.p.) 175 kWt (238 h.p.) 245 kWt (333 h.p.) 280 kWt (381 h.p.) 350 kWt (476 h.p.) 525 kWt (714 h.p.) 630 kWt (857 h.p.)
Engine power - maximal 195 kWt (265 h.p.) 325 kWt (442 h.p.) 455 kWt (619 h.p.) 520 kWt (707 h.p.) 650 kWt (884 h.p.) 975 kWt (1326 h.p.) 1170 kWt (1591 h.p.)
Hydraulic auxiliary engine - minimal       50 кВт 50 kWt 100 kWt 100 kWt 200 kWt 300 kWt 300 kWt
Hydraulic auxiliary engine - maximal   100 kWt 200 kWt 300 kWt 300 kWt 400 kWt 500 kWt 500 kWt

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Dredger Use

Dredgers are widely used at arrangement of dikes, dams and other hydrotechnical object, at overburden activities and mining, at arrangement of channels, hydromeliorative systems, cleaning and deepening of reservoirs, etc

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