CITIC HEAVY INDUSTRIES
Technical Centre
Once operating , the project will mine about 140 million metric tons each year and the processing plant will handle approximately 80 million tons of material . This material goes through in-pit crushers before being transported to the concentrator . The crushed ore then enters giant grinding mills , the most powerful in the world . There will be six grinding mill lines , each using an autogenous ( AG ) mill 12.2 m ( 40 ft ) diameter × 11 m ( 36 ft ) long with a 28 MW gearless motor followed by a 7.9 m ( 26 ft ) diameter × 13.6 m ( 44.6 ft ) long ball mill , each with two 7800 kW motors ( 44 MW in each of six lines ) and standing more than 17 meters high . The final product from these large regrind ball mills using small grinding media will be approximately 28 microns . The mills will produce a fine ore stream which enters magnetic separators to become a concentrate . The concentrate will be thickened and
132 November 2014