ABB has announced it will deliver the drive systems for two high pressure grinding rolls (HPGR) to Thyssen Krupp Polysius for the Karara Iron Ore Project in Western Australia.
Located 225 km east of Geraldton, the Karara Iron Ore project is being developed through a 50:50 joint venture between Gindalbie Metals and Chinese steel producer, Anshan Iron & Steel Group Corporation.
Starting in 2011, Karara will deliver approximately 10mega tons per annum (Mtpa) of iron products, comprising 8Mtpa of high grade magnetite concentrate and blast furnace quality pellets and 2Mtpa of direct shipping ore (DSO) hematite.
The new industrial complex includes a conventional open pit operation and involves mining, crushing, milling and concentration of Magnetite ore, then transportation by rail to the Port of Geraldton for export. The project has a resource base of approximately 522 million tons magnetite reserve, plus 1.853 billion tons magnetite resource, a 10.9Mt hematite reserve and a 16.2Mt hematite resource.
ABB’s delivery includes drive systems for two high pressure grinding rolls (polycom drive systems), each consisting of two 2800 kW squirrel cage motors, two MV frequency converters and two converter transformers.
Today, HPGRs in the minerals as well as in the cement industry are often driven by variable speed drive systems. These provide operational flexibility through a variable speed range, making them ideal for the processing of inhomogeneous types of ore at variable throughput rates.
ABB recently commissioned four HPGR twin drive systems at Boddington gold mine for For Thyssen Krupp Polysius. In addition, Vale’s São Luis and Cerro Verde mines have been successfully operating with ABB HPGR drive systems for several years.
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