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宁芜地区氧化铁矿石大都产于高中温热液型矿床。铁矿物主要是赤铁矿、假象赤铁矿、亦有少量的褐铁矿、含铁碳酸盐。脉石矿物有石英、长石、方解石、高岭土、阳起石、绿泥石等。大部分铁矿物呈不均匀粒状嵌布。在开采中,多数矿山的矿石贫化率在20％左右。近些年来,宁芜地区一些矿山在处理氧化铁矿石中,普遍采用了隔膜跳汰机对分级物料(一般为10～(3～2)毫米、(3～2)～0毫米)进行选别。产品有的作为高炉富矿(含铁>45％)出售,有的作为粗精矿给入磨矿机。所采用的跳汰机型号有:梯形跳汰机
Most of the iron oxide ore in Ningwu area is produced in high school hydrothermal ore deposit. Iron minerals are mainly hematite, illusion hematite, also a small amount of limonite, iron-containing carbonate. Gangue minerals are quartz, feldspar, calcite, kaolin, Yang stone, chlorite and so on. Most of the iron minerals inhomogeneous grainy embedded cloth. In mining, most mines ore depletion rate of about 20%. In recent years, Ningwu some mines in the treatment of iron ore, the commonly used diaphragm jig grading material (usually 10 ~ (3 ~ 2) mm, (3 ~ 2) ~ 0 mm) were selected do not. Some of the products are sold as blast furnace rich ore (> 45% Fe), while others are fed to the mill as rough concentrate. Jig models used are: trapezoidal jig