Study on Magnetic Separation-Gravity Separation-Flotation Combined Beneficiation Test for a Refractory Iron Mine
In order to determine the development and utilization process of a certain refractory iron ore,detailed benefici-ation process test was carried out based on the ore property study.The results showed that:① The grade of iron,the main use-ful component in the ore,is 47.26%,and iron is mainly distributed in hematite,followed by magnetite.The main impurity SiO2 content is 28.69%,the harmful elements S and P content are very low.② The ores were treated with first stage grinding,low intensity magnetic separation,strong magnetic separation,spiral chute gravity separation,second stage grinding and cationic re-verse flotation.Iron concentrate with yield of 55.26%,iron grade of 65.32%and iron recovery rate of 76.86%was obtained.The quality of the concentrate meets the requirements of the owner and can be used as the basis for the technical transformation of plant selection.
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