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SsangYong upgrades conveyor with Voith Turbo

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World Cement,

South Korean cement company, SsangYong Cement has upgraded the conveyor system between its Donghae plant and quarry – a system that includes one of the longer single slight conveyors in the world – with Voith technology.

“Having experience with Voith components in their conveyor system for almost 20 years, SsangYong consulted Voith again for this retrofit project,” Voith said in a statement. The goal of the project was to double the conveyed tonnage from the main quarry to the cement plant – a route that is covered by two belts, including one of 12.8 km.

After initial analysis of the system, the required tonnage improvement was achieved by doubling the belt speed from 3 m/sec. to 6 m/sec. To allow for this increase, both the gear ratio and installed drive power had to be changed.

“The most cost-effective solution was to install completely new drive trains on the long belt conveyor called SB500,” Voith explained. “The installed power is now 2 x 1.2 MW at the head and 1 x 1.2 MW at the tail of the conveyor. The existing Voith drives of the SB500 were used to double the number of drive trains on the shorter SB200 (2 km long) conveyor. After more than 20 years of operation, the drives only needed a maintenance check to get connected with the new controller. The new configuration of the SB200 drive system consists of 4x600 kW installed power at the head equipped with new gearboxes.”

In addition, a new control system was installed to improve performance – including start-up time, which had been more than 10 min. on the longer conveyor belt. Voith TurboBelt DriveControl now manages the start-up in less than half of this time, according to the company.

Voith TurboBelt DriveControl includes active load sharing, belt conveyor control, slip detection and remove service capability. This system helps to extend belt lifetime by reducing the mechanical stress, as well as the dynamic impacts, the company added.

“While operating this long belt conveyor for the last 20 years, we have never seen such a great start-up characteristic, and control,” said Dukgi Lee, General Manager of the Plant and Maintenance Team of Ssang Yong Cement. “Due to this retrofit project, we were able to reduce the working hours of plant workers, achieved cost savings, and a flexible operation is now possible. Thanks to Voith’s technical support and efforts, the plant will enjoy sustainable operations providing value to its community, its owner, and the employees.”

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