Discontinuous Dense Phase System for Iron Ore/Pellet Dust Conveying
Discontinuous Dense Phase System for Iron Ore/Pellet Dust Conveying
Project Overview
Efficient handling of iron ore and pellet dust is a critical requirement in steel manufacturing facilities, particularly when materials must be conveyed over long distances while maintaining system reliability. This project involved transferring iron ore and pellet dust from multiple electrostatic precipitator (ESP) collection points to a single reception point via a centralised conveying network.
The application presented several engineering challenges, including high material density, abrasive dust characteristics, extended conveying distances, and multiple pipeline bends. To address these requirements, Macawber engineered a customised dense-phase pneumatic conveying system capable of ensuring reliable material transfer while minimising wear, pressure losses, and operational interruptions.
Project Challenges
The system was designed to collect and convey iron ore and pellet dust from a total of 16 ESP collection points distributed across two ESP units. Each unit consisted of two rows with four collection points, creating a complex conveying arrangement that required precise system balancing.
Besides the multiple feed points, the conveying line involved about 150 meters of conveying distance horizontally and 50 metres of lifting vertically. The fact that there were six to eight bends along each conveying line posed additional challenges regarding pressure drop. Taking into consideration the high bulk density of the material being conveyed, it was important to design a well-engineered system.
Engineered Dense-Phase Conveying Solution
To overcome these challenges, Macawber India designed a specialised dense-phase pneumatic conveying system configured to handle high-density dust efficiently across the required conveying distances.
The system utilised four rows of Ashveyors arranged in a master-slave configuration. Each row consisted of one master vessel and three slave vessels, enabling controlled material transfer while maintaining balanced system operation. This arrangement allowed the conveying process to be optimised across all sixteen collection points.
To further improve performance, additional air injection points were strategically incorporated throughout the pipeline network. These injection points helped maintain material movement and reduce pressure losses across the conveying route. The discharge cycles were also carefully engineered so that vessels emptied alternately rather than simultaneously, ensuring smoother operation and more stable conveying conditions.
This combination of intelligent vessel sequencing and supplemental air injection enabled efficient handling of the heavy iron ore dust while reducing the risk of line blockage and excessive system loading.
Operational Benefits
1. Reliable Long-Distance Conveying
The system successfully conveyed iron ore and pellet dust over extended horizontal and vertical distances while maintaining stable operation and consistent material flow.
2. Reduced Pressure Drop Impact
Additional air injection points and optimised vessel cycling minimised pressure losses throughout the pipeline network, improving overall conveying efficiency.
3. Lower Wear and Maintenance Requirements
The controlled conveying approach reduced stress on pipelines and components, helping extend equipment life despite the abrasive nature of the material.
4. Improved System Reliability
The master-slave vessel configuration ensured balanced operation across all feed points, reducing the likelihood of operational disruptions and unplanned downtime.
5. Efficient Handling of Heavy Materials
The project highlights the effectiveness of a well-engineered Pneumatic Conveyor for steel applications when handling abrasive materials across complex conveying networks.
Project Outcome
Through a carefully engineered dense phase pneumatic conveying system, Macawber successfully addressed the challenges associated with conveying high-density iron ore and pellet dust from multiple collection points to a common reception location.
The solution combined optimised vessel configuration, intelligent discharge sequencing, and strategic air injection to deliver reliable long-distance conveying performance with reduced wear and improved operational efficiency. The project demonstrates Macawber’s capability in designing customised material handling solutions for demanding steel industry applications. While this installation focused on iron ore and pellet dust, the same engineering principles are applied across a wide range of bulk solids handling applications, including plastic pellet and granule conveying systems.
Project Summary Table
| Material Characteristics | |
|---|---|
| Parameter | Specification |
| Material | Iron Ore / Pellet Dust |
| Temperature | 110°C – 160°C |
| Bulk Density | 2.0 T/m³ |
| Particle Size | Below 100 Microns |
| Characteristics | Free Flowing, Abrasive |
| Parameter | Details |
|---|---|
| Feed Points | 16 ESP Points |
| Reception Point | 1 Common Reception Point |
| Capacity | 2 TPH per ESP Hopper |
| Horizontal Distance | 150 m |
| Vertical Distance | 50 m |
| Number of Bends | 6–8 per Line |
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