Let us design a dredge to meet your needs!
General Types and Descriptions:
No two mining operations are the same. Thats why Supreme Manufacturing offers custom dredge design. If you can dream it, we can build it.
ADVANTAGES OF CLAMSHELL DREDGING:
- Depth capability. They are typically designed for 200’ feet of mining depth. There are several machines in service today digging more than 300’. Deeper designs are possible.
- Increase reserves and the ability to re-open existing properties that are already permitted
- Increase land value
- No loss of fines
- Able to extract large size particles
- Reduce material handling costs
- Eliminate diesel use when designed for all electric
- Reduce manpower
- Increase efficiency
- Improve material flow
- Ease of re-sale with high residual value of equipment
IDEAL APPLICATION:
An ideal application would be an alluvial deposit of sand and gravel found in glacial areas and river basins, typically with a deposit depth greater than 25 feet. Another ideal location is near urban areas where deposits run deep and producer is surrounded by development.
ONBOARD PROCESSING OPTIONS:
- Dewatering Systems - Most clamshell dredges are equipped with material dewatering systems consisting of a double/triple deck horizontal screen. Top deck usually carries the larger gravel. Bottom deck is the dewatering deck. Size is dictated by customer needs and other equipment onboard (i.e. FSR, etc).
- Fine Sand Recovery - This is a system to capture fine material to as small as 200 mesh. Equipment required: vertical pump, cyclone, high frequency dewatering screen, support structure and piping.
- Rake Grizzly - Positioned above the hopper. This option allows the operator to “rake” oversize material and clay to a barge or onboard crushing system. **This system is not compatible with deposits of flat rock.
- Dump Grizzly - This grizzly is designed with square openings. It is operated by hydraulic cylinders.
- Onboard Crushing - The onboard primary crushing has become more popular. Typically a jaw crusher is used, but some systems may utilize impact crushers.
- Hydraulic Rock Breaker - Typically used in conjunction with an onboard crushing system. This allows the operator to limit the size of material before sending it to the crusher and to clean the grizzly.
- Spray Bar Systems - Used where deposits are high in fine material or clays. These systems help wash out unwanted material.
- Wash Down Systems - For washing the pontoon decks and conveyor transitions.
- Material Pumping System - If replacing a hydraulic dredging system to maximize depth in a deposit… a customer may want to retain the existing land-based plant. The clamshell system can be designed to accommodate a material pumping system. This requires a change to the screening process. Rather than a dewatering screen, we utilize a simple scalping screen, which screens at approximately 4”. All minus 4” material is sent to a sump tank and pumped to the plant using a pump and floating pipeline.