High Efficiency Screw Ship Unloader Manufacturers

High Efficiency Screw Ship Unloader Manufacturers

As a High Efficiency Screw Ship Unloader Manufacturers, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.

Hangzhou Aotuo Mechanical and Electrical Co., Ltd. (AOTUO) is a China-based manufacturer and supplier of high efficiency screw ship unloaders, with over 20 years of R&D and manufacturing experience. We provide integrated solutions for dry bulk material port transfer systems, covering cement, coal, clinker, grain, and other bulk solids. Our unloaders are designed for continuous, enclosed, and dust-free operation, with capacities up to 3000 t/h and compatibility with vessels up to 200,000 DWT. As the responsible drafting unit for the industry standard JC/T 2575 "Bulk Cement Spiral Unloader," we combine engineering precision with practical port experience.

Our product range includes rail-mounted, fixed, tire-mounted, vehicle-mounted, and shipborne configurations, each tailored to specific berth layouts and material characteristics. We support projects from concept to commissioning, with a global service network that includes installations in Australia, the Philippines, Vietnam, Indonesia, and Bangladesh.

Our Screw Ship Unloader Range

We offer four main product families under the screw ship unloader category, each engineered for a specific material and operational context. The table below summarizes the available configurations and their typical applications.

Application Fit and Material Considerations

Screw ship unloaders are ideal for continuous, high-throughput unloading of free-flowing and moderately cohesive bulk solids. Unlike grab unloaders, our enclosed screw conveyors minimize dust emissions and material degradation, making them suitable for environmentally sensitive ports and for materials that must remain dry, such as cement and grain.

• Cement and fly ash: The fully enclosed design prevents moisture ingress and clumping, preserving material quality.
• Coal: High-capacity models handle large vessels efficiently, with dust collection to meet emission limits.
• Clinker and abrasive materials: Wear-resistant components and low-speed operation extend service life.
• Grain: Gentle conveying reduces breakage, and the sealed system prevents contamination.

Configuration Options and Automation

We offer several mounting configurations to match your berth and operational requirements:

• Rail-mounted: Travels along the quay to serve multiple hatches; suitable for large vessels.
• Fixed: Stationary installation for dedicated berths with limited movement needs.
• Tire-mounted: Mobile on rubber tires for flexibility across different berths or yards.
• Vehicle-mounted: Integrated on a truck chassis for rapid deployment and small ports.
• Shipborne: Installed on a vessel for self-unloading capability.

Our control systems can integrate with your existing plant automation via PLC and SCADA. We provide remote monitoring, fault diagnostics, and predictive maintenance features to optimize uptime. For abrasive materials, we adjust screw speed and torque to minimize wear while maintaining throughput.

Quality Assurance and Acceptance Testing

Our factory is ISO 9001 certified, and we follow strict quality control procedures throughout fabrication and assembly. Each unloader undergoes load testing and functional checks before shipment. We also provide documentation including material certificates, inspection reports, and operation manuals. Our team supports on-site installation, commissioning, and operator training to ensure smooth handover.

Information We Use to Configure Your Solution

To prepare a precise proposal, we need the following project data. Please provide as much detail as possible:

• Material properties: Bulk density, angle of repose, moisture content, abrasiveness, and particle size distribution.
• Vessel details: Ship size (DWT), number of hatches, hatch dimensions, and freeboard range.
• Required unloading capacity: Average and peak throughput in tonnes per hour.
• Site conditions: Berth layout, quay height, available space, and power supply.
• Environmental regulations: Dust emission limits and noise constraints.
• Integration requirements: Downstream conveyor system, storage silos, or existing control architecture.

Maintenance and Service Support

We design for serviceability, with easy access to wear parts such as screw flights, liners, and bearings. Our global service network provides spare parts, preventive maintenance programs, and 24/7 technical support. We offer training for your operators and maintenance teams, both on-site and at our factory.

Frequently Asked Questions

What is the maximum unloading capacity of your screw ship unloaders?

Our rail-mounted coal unloaders can achieve up to 3000 t/h, while cement and clinker models typically range from 100 to 1500 t/h. The exact capacity depends on material characteristics and vessel configuration.

How do you control dust during unloading?

Our unloaders are fully enclosed, and we integrate efficient dust collection systems that maintain negative pressure at transfer points. This minimizes dust emissions to meet stringent environmental standards.

Can you customize the unloader for specific materials like clinker or grain?

Yes, we tailor the screw design, wear protection, and speed control to match the material's abrasiveness, moisture, and flow properties. For grain, we ensure gentle handling to prevent damage.

What ship sizes can your unloaders handle?

Our range covers vessels from small barges of 500 DWT up to Capesize ships of 200,000 DWT. We select the appropriate configuration based on your berth and vessel fleet.

Do you provide installation and commissioning services?

Yes, we offer full installation supervision, commissioning, and operator training. Our service team can also provide ongoing maintenance and spare parts support globally.