论文部分内容阅读
近廿年来,国外对于采用电磁选解决矿物分离的方法有所进展,由于可供直接冶炼的铁矿资源的枯竭,更加注意采用磁选方法提高贫铁矿的品位。过去除去低导磁率污染物的方法之一是采用干式强磁场磁选,在很多情况下,根据矿石中含铁矿物的数量,需进行多段强磁场磁选,以满足产品质量的要求。尽管这些作业的选矿效果很好,也能满足产品质量的要求,但因给料为干矿,作业本身产生很多灰尘;干式磁选对于选别细颗粒则受到限制。粒度分布情况,特别是细粒矿物的存在对于干式强磁场
In recent 20 years, foreign countries have made some progress in adopting electromagnetic separation to solve the problem of mineral separation. Due to the depletion of iron ore resources available for direct smelting, more attention has been paid to improving the grade of iron-poor iron ore by magnetic separation. In the past, one of the methods to remove low permeability magnetic contaminants was magnetic field dry magnetic field. In many cases, depending on the quantity of iron-bearing minerals in the ore, multi-stage strong magnetic field magnetic separation is required to meet product quality requirements. Although the beneficiation results of these operations are very good, but also to meet product quality requirements, but because the feed is dry ore, the operation itself produces a lot of dust; dry magnetic separation for the selection of fine particles are limited. Particle size distribution, especially the presence of fine-grained minerals, is a strong dry magnetic field