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含铁磷矿通过弱磁选可以得到氧化铁含量大于50%的高铁精矿。实验用王水分解含高铁磷矿微沸加热20 min,含高铁磷矿可溶解完全。用铁铝不分离EDTA容量法直接测定氧化铁,此方法测得结果与重铬酸钾容量法分析结果相符,说明方法可靠。
Iron-bearing phosphate rock can be obtained by weak magnetic separation of iron oxide content of more than 50% of high-iron concentrate. Experiments with aqua regia containing high iron phosphate slightly boiling heated 20 min, with high-iron phosphate can be completely dissolved. Iron and aluminum is not separated by EDTA volumetric method for the direct determination of iron oxide, the method measured results and potassium dichromate capacity analysis results agree, indicating that the method is reliable.