积极开展含磷难处理铁矿石高效利用基础研究，对缓解我国铁矿石供给紧张局面、保证我国铁矿石的供给安全具有十分重要的战略意义。鲕状赤铁矿是我国主要的复杂难选铁矿石之一，如何在冶炼之前实现铁-磷高效分离富集，是综合利用高磷鲕状赤铁矿的关键。本项目拟以典型鲕状赤铁矿为对象，利用微波选择性加热的显著特点和特殊效应，建立强化还原焙烧—磁选分离的铁-磷分离新技术，获得还原铁粉和富磷渣。针对鲕状赤铁矿传统加热还原脱磷过程中存在的相关问题，围绕新工艺技术环节的基础理论开展研究工作：在研究鲕状赤铁矿工艺矿物学特性及微波电磁特性的基础上，查明微波场中鲕状赤铁矿相重构和磷元素迁移规律，解明鲕状赤铁矿微波还原行为及动力学特征，探明铁晶粒形核-生长机理，获得磨选过程优化机制。项目的顺利开展，将建立鲕状赤铁矿的绿色分离新技术，为难处理高磷铁矿的高效利用提供可移植性理论依据。

The basic research of efficient utilization of high phosphorus content refractory iron ore holds greater strategic importance for relieve the tense situation and ensure the safety of China's iron ore supply. Oolitic hematite is one of primary complex refractory iron ore in China. The key factor in the comprehensive utilization of the oolitic hematite is to realize the separation and enrichment of iron and phosphorus economically and effectively, before which enter into smelting processes. This project tries to establish a new separation technology for seperation of Fe and P in oolitic hematite through combination of reduction roasting and magnetic separating, and obtain two kinds of products of reduced iron powder and rich-phosphorous slag, basing on the microwave selective heating and others special effects. The main fundamental research contents of this project are include following: 1) the process mineralogy characteristics and microwave electromagnetic characteristics of oolitic hematite; 2) the mineral phase reconstruction and phosphorus transfer pattern of oolitic hematite when heated in microwave field; 3) the reduction behaviors and kinetis characteristics by microwave heating; 4) the iron grain nucleation and growth mechanism of oolitic hematite in microwave field; and 5) the optimized parameters of grinding and magnetic separation.This project will estanblishs an green separation technology of rion and phosphorus for oolitic hematite, and provides a portability theory basis for efficient utilization of other high phosphorus content refractory iron ore in China.