The circular storage will be erected in Xiamen by the end of 2012, with trial operation scheduled for May 2013. The storage facility has a diameter of 120 m and can store coal at 4,400 metric tons per hour (mt/h), reclaiming capacity is set at 2,000 mt/h.

More than 50 circular storage units have been supplied to China and Taiwan since the 1990s. This latest circular storage contract is already the seventh to be delivered to Hua Yang.

Taiwan, another regular Schade customer, has purchased several large storage units featuring diameters of up to 120 m and storage and reclaim capacities of 4,000 and 2,000 mt/h. Nine such storage units were shipped to the Far East island between 1997 and 2002 alone.

In addition to the power sector, the chemical industry has purchased several circular storage facilities, A 100-m diameter unit was supplied to Jiahua Chemicals in Changzhou (near Shanghai) in February. That circular storage facility is designed for a storage capacity of 900 mt/h of coal; the reclaim capacity is 600 mt/h.

Circular storage facilities offer a combination of low space requirement and high storage volume, and are available in various configurations employing a combination of stacker, slewing, circular or portal scraper. Storage of the material is performed based on the cone forming process, the scrapers are equipped with a double strand chain and wear-protected buckets. The simultaneously enabled stacking and reclaiming processes are SPS-controlled. Strict environmental protection regulations have significantly increased the demand for enclosed storage facilities. The first circular storage facility with combined stacker/scraper was designed and built in 1988 to store 95,000 m3 of coal on a stockyard measuring 97-m in diameter. www.schade-lagertechnik.com