高磷鲕状赤铁矿深度还原过程中磷的迁移行为

发布时间：2018-03-17 01:25

本文选题：高磷鲕状赤铁矿　切入点：深度还原　出处：《金属矿山》2017年02期 　论文类型：期刊论文

【摘要】：湖北某高磷鲕状赤铁矿石铁品位为42.21%、磷含量为1.31%;铁主要以赤铁矿形式存在,磷主要以磷灰石形式存在。为考察深度还原过程中磷的迁移行为,对该矿石进行了深度还原—弱磁选试验。结果表明:升高还原温度、延长还原时间或增大碳氧摩尔比均有利于磷向金属铁相富集。在还原温度1 548 K、碳氧摩尔比2.5和还原时间60 min的条件下进行还原,获得的还原产品磨细至-0.074 mm占84%,在磁场强度为107 k A/m的条件下弱磁选后,可得到磷品位2.49%、回收率77.07%的高磷金属相。金属相SEM及EDS能谱分析结果表明:金属相中部分区域的磷以P-Fe固溶体的形式存在,部分区域的磷以Fe_xP和P-Fe固溶体的形式共存。
[Abstract]:The iron grade of a high phosphorous oolitic hematite in Hubei province is 42.21 and the phosphorus content is 1.31. Iron mainly exists in the form of hematite and phosphorus mainly in the form of apatite. A deep reduction-weak magnetic separation test has been carried out on the ore. The results show that the reduction temperature is increased, Prolonging the reduction time or increasing the molar ratio of carbon to oxygen are beneficial to the enrichment of phosphorus to iron. The reduction temperature is 1 548 K, the molar ratio of carbon to oxygen is 2 5 and the reduction time is 60 min. The reduced product was milled to -0.074 mm (84 / 84) after weak magnetic separation with a magnetic field intensity of 107 Ka / m. The results of SEM and EDS energy spectrum analysis show that the phosphorus in some regions of the metal phase exists as P-Fe solid solution, and the phosphorus in some regions coexists in the form of Fe_xP and P-Fe solid solution.
【作者单位】：东北大学资源与土木工程学院;
【基金】：国家自然科学基金项目(51134002)
【分类号】：TD951

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