1.10-inch cutter suction dredger as a solution to iron ore mining in the Yenisei River Basin
The Yenisei River Basin is the largest iron ore-rich area in Russia, releasing about 230 million tons of iron-containing sand resources during the thawing period from May to September each year. Traditional sand mining ships can still maintain operations in shallow waters, but encounter three major technical bottlenecks in the 12-meter deep water area of the main river:
1.1 Geological complex problem:
basement basalt + 20cm gravel layer (accounting for 35%) + high viscosity frozen clay (plasticity index>17) form a “natural armor layer”
1.2 Extreme cold operation and maintenance dilemma:
-45℃ low temperature causes hydraulic oil solidification, steel embrittlement, and mechanical failure rate surges by 300%
1.3. Economic bottleneck:
diesel-powered equipment has an energy consumption cost of $2.17 per ton of sand, and the magnetic separation recovery rate is only 72%
In 2020, Russian customers introduced Tai’an Ocean pump company’s 8-inch jet sand pumping ship, which achieved 800m³/day in 5-meter shallow waters, with good results.
When the Siberian rivers thawed, the river sand rich in iron ore in the 12-meter deep water area could be mined, but when it was pushed to the deep water area of the main channel, gravel blocked the pump body and the pump was shut down for an average of 3 hours a day. Clay wrapped iron sand caused 40% loss of magnetic separation, and the mining efficiency plummeted by 60%. This is not only a failure of equipment, but also exposes the systematic incompatibility of traditional processes with complex formations. To this end, we developed a 10-inch pump cutter suction sand pumping ship as a solution. This is not only an equipment upgrade, but also a complete sand and iron separation system, including onshore magnetic separation equipment. Its core power uses a 220KW industrial motor, which can significantly reduce the cost of a ton of sand by 50%.
2.Russian customer experience and solutions
2.1 Initial equipment performance
Customers use 8-inch suction sand pumping vessels in the tributaries of the Yenisei River:
Daily average sand extraction: 800m³ (water depth <5 meters loose sand layer)
Iron sand recovery rate: 72% (matching single-stage magnetic separator)
Main problem: No cutting function causes pebbles to block the pump body → 3 hours of cleaning is required every day
2.2 Challenges of deep-water operations
After advancing to the 12-meter deep area of the main river channel:
Geological conditions: basalt base + 20cm particle size gravel layer + high viscosity frozen soil clay
Equipment failure:
Sand pump impeller breaks within 48 hours
Sand discharge pipe is broken by pebbles
Magnetic separator loses more than 40% iron sand due to uneven feeding
2.3 Improvement plan for suction sand pumping vessels
Three key technical upgrades:
Problem points: pebble layer, clay mass Magnetic separation loss
Suction vessel defects: pump blockage, pipeline siltation, unstable recovery rate
Suction vessel solution:
⌀1200mm tungsten-cobalt alloy reamer cutting
24000N.M hydraulic torque + countercurrent cutter
Three-stage buffer box + electromagnetic feeding stabilization system
3.Equipment technical specifications
3.1 Hull structure
Three-body split design
Main hull size: 12m×3.2m×1.5m
Side buoy size: 19m×1.2m×1.5m (two sets)
Core configuration:
Transportation plan: Side buoy welded container corner parts, support full container transportation
Hull material: 8mm Q345B antifreeze steel plate (-50℃ impact toughness ≥27J)
Deck design: 5mm diamond convex anti-slip panel + snow melting agent guide groove
3.2 Power system economic comparison
220KW motor vs diesel engine (Russian electricity price 0.1 US dollars/KWh)
- Energy consumption cost for 2000 hours of operation per year:
Diesel engine: 220KW×0.26L/KWh×2000h×$1.2/L = $137,280
Electric motor: 220KW×2000h×$0.1/KWh = $44,000
- Annual maintenance cost:
Diesel engine: $15,000
Electric motor: $3,200
Annual comprehensive savings: $105,080
3.3 Reamer system parameters
Structural design:
12-spoke cross cutter head (anti-winding structure)
72 replaceable tungsten-cobalt alloy teeth (single tooth compressive strength 1850MPa)
Axial piston hydraulic motor (output torque 24,000N.M)
Measured performance:
In a clay layer containing 30% pebbles, the processing volume per hour is 42m³
3.4 Workflow and effect
Reamer crushing riverbed → 10-inch sand pump (1100m³/h) suction
DN250 wear-resistant pipe transport to 500m buffer box
Vibrating feeder evenly distributes to RCYD-12 three-stage magnetic separator
Output 62% grade iron ore → environmentally friendly backfill of tailings
Recovery rate: 91.7% (19.7 percentage points higher than the old system)
4.Design for adaptability to extreme cold environments
4.1 Motor antifreeze solution
H-class insulation winding + PT100 temperature sensor
Oil bath heater (preheat to -15℃ before starting)
Motor cavity filled with dry nitrogen to prevent condensation
4.2 Hydraulic system antifreeze measures
Hydraulic oil model: Shell Tellus S4 VX (pour point -54℃)
Pipeline insulation: electric heating belt + polyurethane insulation layer
Emergency backup: integrated 20KW diesel warm-up
4.3 Maintenance optimization design
Reamer tooth replacement: hydraulic locking device (completed by one person in 5 minutes)
Sand pump maintenance: quick-detachable front cover (no lifting maintenance)
Remote monitoring: IoT terminal transmits operation data in real time
5.Equipment performance measured data
90-day test comparison in Krasnoyarsk:
In the field test in Krasnoyarsk, Russia, the 10-inch cutter suction dredger and the customer’s original 8-inch jet suction dredger were compared for 90 days of parallel operation. The specific data are as follows:
5.1 Average daily sand production
Old 8-inch jet suction dredger: 620 cubic meters
New 10-inch cutter suction dredger: 1,850 cubic meters
→ Increase: +198%
5.2 Pebble layer processing speed
Jet suction dredger: 0.8 meters per hour
Cutter suction dredger: 4.2 meters per hour
→ Increase: +425%
5.3 Monthly maintenance stop Machine time
Suction jet: 37 hours per month
Cutter suction dredger: 9 hours per month
→ Reduction: -76%
5.4 Iron content of sand
Suction jet: 3.1 kg iron per ton of sand
Cutter suction dredger: 4.8 kg iron per ton of sand
→ Increase: +55%
5.5 Comprehensive cost of sand per cubic meter
Suction jet: $2.17/m3
Cutter suction dredger: $0.89/m3
→ Cost reduction: -59%
6.Conclusion: Taian Ocean Pump Manufacturing Co., Ltd.’s in-depth solution
In the harsh deepwater pebble layer working conditions in Krasnoyarsk, Russia, the 10-inch pump dredger designed by Taian Ocean Pump Manufacturing Co., Ltd. verified its technological leadership with measured data:
As a Chinese manufacturer focusing on the research and development of sand pumping equipment for 18 years, Taian Ocean Pump has delivered special sand pumping equipment to 23 countries around the world. We provide:
In-depth customization: optimize reamer torque and pump power according to riverbed geological reports
Full-chain service: from river exploration, equipment commissioning to magnetic separation system integration
Continuous empowerment: IoT remote operation and maintenance + annual equipment health inspection
Immediate action
[Get the same proposal as the Russian project][Submit river channel parameters to customize equipment]
▌ Taian Ocean Pump Manufacturing Co., Ltd. ▌
Focus on deepwater complex stratum sand extraction solutions
Authored by
Tai’an OCEAN Pump Co., Ltd
Alina.Liu
Email: Oceanpump15@tsbeng.com
WhatsApp: +86 17354610320
