电子探针在本溪某深部铁矿石工艺矿物学研究中的应用

Application of EPMA in the Processing Mineralogy Study of a Deep Iron Ore in Benxi, Liaoning Province

通过对辽宁本溪某深部铁矿石进行详细的工艺矿物学研究,得出该矿石性质为含铁石英岩,金属矿物以磁铁矿为主,含微量的赤铁矿,脉石矿物以石英、白云母、绿泥石等为主。矿石全铁品位为28.05%,其中硫、磷等有害杂质含量低;矿石中主要的铁矿物为磁铁矿和赤铁矿,其中磁铁矿矿物量为32.30%,平均含铁品位70.32%,赤铁矿矿物量为3.81%,平均含铁品位68.51%,它们是选矿回收的主体矿物。根据他们的含铁量测算得知,铁精矿的理想品位应该达到70.195%,理论回收率为90.34%。该铁矿石中绿泥石含量较高,达7.23%,在选矿过程中它会恶化浮选指标,增加泥级含量,因此要多注意磨矿粒度问题,以提高产品的质量。

Through detailed process mineralogy on a deep iron ore in Benxi, Liaoning Province, the iron ore property is ferruginous quartzite The metal mineral is mainly magnetite, containing a small amount of hematite. The gangue minerals are mainly quartz, muscovite and chlorite. The ore total iron grade is 28.05%, with low levels of harmful impurities such as sulfur and phosphorus. The main iron minerals in the ore are magnetite and hematite, of which the magnetite mineral content is 32.30%, and the average iron grade is 70.32%. The hematite mineral content is 3.81%, and the average iron grade is 68.51%. They are the the main minerals of dressing recovery. According to their measurement of iron content, the ideal grade of iron ore concentrate should reach 70.195%, and the theoretical recovery rate is 90.34%. The content of chlorite in the iron ore is 7.23%,. It will aggravate the flotation index and increase the mud content during the beneficiation process.Therefore, it is necessary to pay more attention to the grinding particle size problem to improve the quality of the product.