Beneficiations of Classifier overflow from the Noamundi Iron ore Washing Plant

Abstract

A Sample of classifier overflow from the Noamundi iron ore washing plant was received from Messrs. Tata Iron & Steel Co., Ltd., for beneficiation tests. As received, the sample assayed 51.41% Fe, 12.80% Al2O3 and 8.51% product, assaying over 90% Fe2O3, for paint manufacture. Straight tabling of the sample as received, as well as tabling after attrition grinding, yielded concentrates of the specified grade, but the recoveries were low. Attrition grinding released more of the aluminous material and yielded after tabling a concentrates with lower alumina content. Though concentrates of the required grade could be produced by the above methods, they contained 10-12% of +200 mesh oversize material which would require further grinding in a ball mill for paint manufacture.