DELKOR India has successfully completed the revamp of one of its largest horizontal belt filters located in the West Bokaro coal field, owned by Tata Steel. This milestone TAKRAF Group says reinforces its commitment to innovation, reliability and unmatched after-sales support for the mining industry.
Originally supplied by DELKOR in 2006, the 145 m² Horizontal Belt Filter (HBF) had already delivered an impressive 19 years of continuous operation prior to the revamp. This longevity highlights the robustness of DELKOR’s filtration technology and the strength of its original equipment design. Located at Tata Steel’s West Bokaro plant, the unit is one of the largest HBFs for coal applications in India and ranks as the second largest globally.
The revamp was executed under challenging site conditions and within a tight schedule. From dismantling to successful commissioning within only two months in 2025, the project was completed with a strong focus on safety, precision and operational continuity.
To ensure efficient execution, DELKOR implemented an innovative open-belt solution that simplified installation while maintaining optimal performance in coal concentrate dewatering.
“This project demonstrates the long-term value of DELKOR’s Horizontal Belt Filter technology. After nearly two decades of reliable operation, the successful revamp ensures that the unit will continue to perform at the highest standards of efficiency and availability,” said Amit Vikram, Product Manager for Horizontal Belt Filters at DELKOR India.
Prior to the shutdown, DELKOR prepared and supplied all major components required for the revamp, including filter belt, frames, airboxes for belt support, vacuum boxes and lifting systems, as well as newly designed seal strips, pulleys, rollers and associated components. All key components were replaced with new spare parts. In addition, several elements were strategically upgraded to enhance performance, simplify spare parts management and maximise plant uptime.
Key technical enhancements cited include:
- Site-spliced 4.2 m wide filter belt:Â The belt was spliced on site to suit local conditions and accelerate the revamp process. DELKOR service experts performed belt tracking and drilling with high precision.
- Optimised vacuum box design:Â Redesigned for compatibility across multiple bays and handing configurations, enabling Tata Steel to streamline spares inventory across three DELKOR HBF units.
- Redesigned airboxes:Â Enhanced Materials of Construction (MoC) and improved maintainability ensure extended service life and increased reliability.
- Upgraded vacuum box lifting system:Â Newly designed in stainless steel and installed outside the frames for improved accessibility and durability.
Together, DELKOR India says these upgrades deliver improved efficiency, extend equipment life and simplify maintenance, directly supporting Tata Steel’s long-term operational objectives. “The project highlights DELKOR India’s strong aftermarket capabilities and its commitment to supporting customers throughout the full lifecycle of their equipment.”
“Our ability to execute complex revamps such as this one reflects the strength of our local engineering expertise combined with DELKOR’s global technology standards. We are proud to support Tata Steel with solutions that enhance reliability, efficiency and long-term performance,” adds Rajiv Krishnamurthy, Managing Director of DELKOR India.
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