Feasibility Study on Treatment of a Powdered Hematite Ore by an Idle Beneficiation System
The iron grade of Mauritania powder(+5.0 mm 22.10%)acid iron ore is 58.65%,the con-tent of sulfur and phosphorus is very low,the main impurity component is silicon,and there is no obvious enrichment phenomenon of iron in each particle size.In order to determine the beneficiation process of the ore,laboratory tests and industrial production tests are carried out.The results show that the iron concen-trate with iron grade of 64.09%and iron recovery of 92.18%can be obtained under the condition of grinding fineness of-0.074 mm 68.75%and high intensity magnetic separation magnetic field intensity of 1.0 T.The closed circuit grinding-low intensity magnetic separation-two times high intensity magnetic roughing separa-tion process is used for industrial production test.The total concentrate with yield of 85.10%,iron grade of 63.54%and iron recovery of 92.68%is obtained.The tailings with iron grade of 28.68%can be sold to the surrounding cement plants as iron correction raw materials to realize the comprehensive utilization of re-sources.
hematitemagnetitehigh intensity magnetic separationcomprehensive utilization
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