ABB’s Dodge® controlled start transmission (CST) drives provide maximum reliability on one of India’s longest mining conveyors

2016-11-17 - Three CST units deliver 99 percent availability on the Kapurdi lignite mine’s 4.5 kilometer conveyor.

India SWML min conveyor Providing maximum reliability on one of India's longest mining conveyors.

Owned by Barmer Lignite Mining Company Limited (BLMCL), the Kapurdi mine was established in 2010. Located in Northwest India, the mine delivers lignite, sometimes referred to as brown coal, to the Jallipa Kapurdi coal-fired power plant.

Initially the lignite was transported to the plant with trucks. But according to company Sr. Vice President, Anil Sood, after two years of employing this method of transportation, mine officials determined that a long conveyor would be a better solution.

“Transporting the lignite on a conveyor is more environmentally friendly, with minimal pollution and dust,” explains Sood. “A conveyor is also a more cost effective all weather transport solution.”

With the conveyor becoming the life line from the mine to the power plant, selecting the equipment that would power the long conveyor was a top concern. Mine officials considered a variety of options, but became seriously interested in the CST solution after a technical presentation delivered by ABB’s local Dodge mechanical power transmission team.

“We explained how the CST design combines a planetary gear reducer with an integral wet clutch system to provide an efficient transmission of motor power and torque,” says Prabal Bose, ABB’s regional sales manager for Dodge MPT products in India. “This allows for a consistent smooth startup and shut-down of long conveyor belts, which adds to the reliability of the entire system by minimizing peak loads and stresses on all the conveyor components. We also detailed how the double lip taconite sealing system with an added excluder seal prevents any contamination from entering the CST.”

Sood and other company officials were impressed with the capabilities the CST offered.

“After going through all of the technical details of the product, we thought the CST might be the best option for our desert location with high temperatures and dust,” explains Sood.

To help them reach the final decision, the ABB team suggested a visit to a CST installation in China where multiple units have been successfully running for 5 years. The Kapurdi mine team was eager to see first-hand how the product performed in application and to hear what others in the industry had to say about the CST.

“During the visit to China, we found that the CST units were very reliable and provided very smooth starting,” says Sood. “The team also learned that the product is easy to install and easy to maintain. Based on all of this we decided that the CST was the right choice.”

Today, after years of trouble-free performance, Sood says it’s clear their decision was absolutely correct.

“We have been operating the mine at 100 percent capacity for more than two and a half years,” explains Sood. “The CST drives have delivered 99 percent availability with no breakdowns and have only required oil replacement. We would opt for the CST again in the future because it is robust machine.”

BLMCL Operations Vice President, Amrendra Kumar, shares the same opinion.

“CST is the best solution to power a long distance conveyor, particularly in extreme weather, as it runs trouble free and does not need any day-to-day maintenance.”

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    Dodge CST
    The Dodge CST gearbox is a rugged, cost-effective solution engineered to provide a consistent, smooth startup and shutdown of long conveyor belts.
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