司家营铁矿Ⅰ号矿体矿石工艺性质分析

Technological Property Analysis of Orebody Ⅰ in Sijiaying Ore

司家营铁矿为冀东地区一特大型沉积变质型铁矿床,通过运用晶体光学、工艺矿物学等研究手段,对该矿床Ⅰ号矿体矿石的矿物组成、工艺粒度及有用矿物的嵌布特征等进行系统研究。在此基础上,将矿石划分为易解离易选型、易解离难选型、难解离难选型三种嵌布类型,并分析了每种矿石的工艺性质及可磨性,预测了磨矿粒度、回收率等选矿指标,对指导配矿及优化选矿工艺流程具有指导意义。结果表明,矿物性质波动大、嵌布粒度不均匀、细粒级含量高是造成目前选矿指标不理想的重要原因。提高回收率的关键在于对难选难解离矿石的充分细磨,加强对细粒级铁矿物的回收,另外也要严格控制易泥化矿石的入选比例。

Sijiaying Iron Mine is one of the super large sedimentary-metamorphic iron ore deposit in Jidong areas. Substance compositions, technological granularity and embedded features of the ores in orebody I are systematically studied by crystal optical and mineralogical methods. On the basis of it, the ore can be classified into three types： easy to disintegrate and easy to selection, easy to disintegrate and hard to beneficiate and hard to disintegrate and hard to beneficiate. Meanwhile, the technological properties and grindability of each type are studied, the ore grinding, recovery and other indexes are calculated, which results have directive significance to ore blending and process optimization. The result showed that the variation of the mineral properties, the nonuniform grain size distributions, the high content of fine minerals are the main reasons making the technical indexes unsatisfactory. The key to improve the recovery is to make the refractory ore fine grinding, strengthen the recovery of fine iron minerals and strictly control the proportion of the ores easy to be slimed