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Experimental investigation on concentration of low-grade pyrite

Wen Shuming Hu Tianxi Zhou Xinglong (Kunming University of Science and Technology,Kun ming,Yunnan,650093,China)  
Laboratory and industrial experiments of concentration of low-grade pyrite containing 17%and 21%S were carried out,respectively,for increasing iron grade in pyrite cinder and realizing full utilization of pyrites resource. The industrial experiments showed that pyrite concentrate containing 51.09%S was obtained by floatation with 90.85%S recovery.Roasting of the concentrated pyrite produced a cinder containing 65.11%Fe and 0.21%S on an average,which was up to the iron-making raw material specification.
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