【摘要】 通过对曲靖铁矿石两种分选矿尾矿的性质进行研究,提出了分选尾矿的方案,对+0.28mm各粗粒级粉矿进行干式强磁分选,对-0.28mm拟采用湿式强磁选。本文对影响干式强磁分选的主要因素磁场强度和极距进行了试验研究。研究结果表明,随着粒度组成的变化,磁选时所需要的最佳场强是不同的,随着粒度增大,所需的磁场强度增大;随着粒度组成的变化,磁选时所需要的最佳极距也是不同的;随着粒度增大,磁选时所需要的极距也增大。更多还原

【Abstract】 Based on studies on the properties of two kinds of tailings from Qujing iron ore,their beneficiation schemes were put forward:+0.28mm fractions were to be separated by dry high intensity magnetic separation and-0.28mm fractions were to be separated by wet high intensity magnetic separation.The magnetic intensity and polar distance influencing the effect of dry high intensity magnetic separation were studied in this paper.The results show that the best magnetic intensity and best polar distance for magnetic separation were different along with particle size distribution.Magnetic intensity was needed to strengthen and polar distance was needed to extend with the enlarging of particle size.更多还原