Sand Dredging Pump

The sand dredging pump is a centrifugal pump specifically designed for extracting and transporting loose sediments such as sand, silt, and slurry at the bottom of rivers, lakes, ports, and other water bodies. It combines the large particle handling capacity of an excavating pump with the wear-resistant characteristics of a slurry pump. At medium head (10–60 m), it achieves an ultra-large flow rate (100–12,000 m³/h), capable of efficiently processing dredging media with high sand content and wide particle size distribution. Compared to ordinary slurry pumps, the flow path of the sand dredging pump is wider and the number of blades is fewer (usually 3–5), to prevent sand and stones from blocking; compared to high-head excavating pumps, it focuses more on flow rate and through-ability, with a moderate head, and is more suitable for shallow water areas and short-distance transportation. The flow components are made of high-chromium alloy (Cr26/Cr28) or wear-resistant alloy steel, with a hardness of ≥58 HRC, capable of withstanding intense scouring by sharp particles such as quartz sand and gravel. The pump body structure has two types: single pump housing (lightweight, 360° outlet adjustable) and double pump housings (replaceable wear plates), suitable for different marine and shore-based requirements.

Sturdy and practical casing with low wear
Good corrosion resistance / Simple operation / Smooth running
Thickened pump housing - Powerful power
Thickened pump housing cast - Strong resistance to external forces - Stable running
Thickened base reduces resonance and ensures stable operation
Uses double-suction flow channel impeller
Strong suction, higher head, larger water volume

Wide-flow impeller: Semi-open or closed impeller, with 3 to 5 blades. The flow channel width is 30-50% larger than that of ordinary slurry pumps. It can handle the maximum solid particle diameter of 80-240 mm (depending on the model) and has excellent anti-blocking performance.
High-chromium alloy flow components: The impeller, pump body, and front and rear guard plates are all made of KmTBCr26/Cr28 high-chromium white cast iron. The hardness is HRC 58-63, and the wear resistance life is 8-10 times that of ordinary cast iron.
Single pump housing / double pump housing options:
Single pump housing: Belt connection, lightweight structure, adjustable outlet direction within 360°, suitable for compact ship space scenarios.
Double pump housing: Outer pressure-bearing pump housing + inner replaceable liner. After wear, only the liner needs to be replaced, resulting in low maintenance costs.
Heavy-duty bearing assembly: Double-row conical roller bearings + thrust bearings, lubricated with thin oil, capable of withstanding large radial and axial impact loads.
Stirring impeller (optional): A stirring impeller can be added at the bottom of the pump to stir the deposited sand into turbulent flow, improving the extraction concentration.

Sand dredging pumps excel in the following scenarios for waterway dredging and sand transportation:
River dredging: Removal of silt and sand from small rivers and urban landscape rivers
Lake dredging: Removal of nutrient-rich lake bottom sediment and water depth restoration
Port and harbor channel maintenance: Regular dredging of harbor pools and inbound channels to ensure navigable water depth
Coastal filling: Sand dredging of coastal mudflats and marshlands for land development
Sand mining sites: Extraction and transportation of river sand and sea sand, with slurry transportation before sand and stone separation
Environmental dredging: Precise removal of contaminated sediment, combined with sealed transportation systems
Reservoir dredging: Restoration of reservoir capacity and sediment discharge for reduction of siltation
Emergency response: Sealing of river breaches during floods, and clearing of sudden siltation in waterways

Selection criteria for five elements:
Medium characteristics: Sand and soil particle size distribution, sand content, presence of debris (branches, plastic bags, etc.)
Flow demand: Calculate the required flow based on the dredging area and construction period requirements
Transport distance: The spacing determines the head requirement (including geometric height difference + pipeline friction loss)
Installation method: Ship-based (suction type / scraper type) vs shore-based fixed
Drive method: Diesel engine (commonly used on ships), motor (shore-based), hydraulic motor (underwater pump)
Material selection:
Common river sand, silt → Cr26 high-chromium alloy (HRC 58–62)
Sand with quartz sand, gravel, etc. sharp particles → Cr28 ultra-high chromium (HRC 60–63)
With acidic medium (pH < 5) → Duplex stainless steel or rubber lining
Structural selection:
Ship-based space is compact → Single pump housing + clamp connection, 360° outlet adjustable
Shore-based fixed, convenient maintenance → Double pump housing + replaceable liner
Custom service: Special flange standards (ANSI/DIN/GB), explosion-proof motor, diesel engine drive, hydraulic motor drive, extended shaft, mixing impeller, OEM nameplate, complete skid-mounted unit.

Company: Ningbo Zhongxin Mining Energy Co., Ltd. (CZME), specializing in pumping solutions for over 10 years.
Scale: 100+ employees, 60+ distributors, 50+ patents.
Quality: ISO certification, complete test reports and pre-delivery videos are provided upon shipment.
After-sales: 12-month global warranty, 24-hour technical support, emergency parts dispatched within 48 hours.
Customization: Supports OEM/ODM, special materials, coatings, and non-standard designs can all be undertaken.

3. What particle sizes and concentrations of materials can it handle?
Depending on the model, the maximum size that can be passed is 60mm, and the maximum processing concentration is up to 70% (by weight). Larger channels can be customized.
4. Which excavators does it fit?
It is compatible with series such as 120, 150, 200, 220, 240, 300, 330, 360, etc. The brands include Caterpillar, Komatsu, Hitachi, Volvo, XCMG, Sany, etc. It can also be equipped with a hydraulic station separately.
5. What material are the flow components made of?
The standard material is high-chromium alloy, and SS304, SS316L, CD4MCu, duplex steel 2205 can be selected to adapt to corrosive media.
6. Where is it mainly used?
River dredging, port dredging, tailings pumping, municipal sediment removal, power plant ash and slag transportation, steel plant sludge cleaning, coastal reclamation, sewage treatment, etc.
7. Do you provide customization and after-sales service? Yes. Support OEM/ODM customization. Offer 12-month global warranty, 24-hour technical support, and emergency parts dispatched within 48 hours.

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