The 6600 cubic metre Tenova TAKRAF bucket wheel excavator at the Zhahanaoer Open Pit Mine in northern China.

OPEN pit mining and underground solutions provider Tenova TAKRAF has completed the supply and installation of a complete bucket wheel excavator (BWE) system for Zhahanaoer Open Pit Mine in Inner Mongolia, China. The system features the largest BWE-conveyor-spreader combination of its kind in Asia.

The system was inaugurated with a celebration on site last November attended by representatives of the client, CPI Mongdong Energy Group. The inauguration followed successful performance testing, which confirmed the high efficiency and reliability of the entire system and exceeded the expectations of all parties.

The system consists of a large-scale BWE Excavator SRs 2000 with rated hourly capacity of 6600 cubic metres, loading unit, a 7750 metre-long conveyor system consisting of five flights as well as a compact spreader with tripper car on rails. The BWE reaches 30 metres digging height and although it has a service weight of about 3300 tonnes, it has a ground pressure much lower than that of a D11 Dozer. In order to properly handle peak capacities the conveyor system, including the spreader, has an hourly design capacity of 7900 cubic metres. The conveyors running along the excavator bench and along the waste dump are shiftable.

The project commenced in September 2009 with the BWE, spreader and conveyor system awarded in three stages from 2009 to 2011. The complete turnkey project covered design, supply, transport, on-site installation, commissioning and testing.

The project site is approximately 700km from Beijing in northern China, where the extreme climatic conditions see winter temperatures of down to -40 and summer temperatures of up to +40. Despite this and other highly challenging conditions, the project teams achieved a smooth erection and commissioning process, completing the project on schedule in early November 2014.

The project is regarded as an important milestone in the development of China’s mining industry, typified by a trend towards larger scale mines and mining equipment. It also provides a good example of successful German-Chinese-cooperation.

For Tenova TAKRAF, the project continues its success with the supply of bucket wheel excavators to China, and follows delivery of two BWE systems to Yuanbaoshan in the 1990s.

Tenova TAKRAF is a key supplier of equipment and systems for open pit mining & underground solutions and bulk handling, having provided hundreds of complete systems, as well as individual machines to clients all over the world in all climatic conditions. Globally sourced air pollution control, specialized handling equipment, and technology for the cement and fly ash industries ensure selection of optimal processing options.

Together with Tenova DELKOR, which has been fully integrated into Tenova TAKRAF, complete systems for coal washing and solid-liquid separation can be offered.

Tenova is a worldwide supplier of advanced technologies, products, and engineering services for the metals and mining & minerals industries.

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