高磷赤铁矿非熔态分离提取

Separation and extraction of a typical high-phosphorus hematite at the non-melt state

对湖北恩施的典型高磷赤铁矿样品进行了非熔态分离提取实验研究.矿样基础特性研究表明,该矿为典型鲕状高磷赤铁矿,矿中铁元素与磷元素之间并未处于化学结合状态.据此采用高速气流磨技术,将其磨至平均粒度为2μm的超细粒度,观察发现铁元素与磷元素在各个超细矿粉颗粒中的含量分布不均匀,Fe、P化合物有所解离.进而采用流态化技术进行气力分离,设计制造了流态化装置,对超细矿粉的流态化特征进行研究,结果表明超细铁矿粉的流态化特征与常规细粉不同.基于富铁物料与富磷物料的密度差异,设计制造了气力分离装置,对超细高磷赤铁矿粉进行气力分离实验,初步实现了铁元素和磷元素的分离.

Experiments were done to study the physical dissociation of phosphorus and iron elements in typical high-phosphorus hematite ore samples from the Enshi area of Hubei Province, China. The basic characteristics analyses of the ore samples show the ore is a typical oolitic hematite in which iron and phosphorus elements are not in a chemical combination state, indicating that by the high- speed jet mill technology, the high-phosphorus hematite is finely ground to an average particle size of 2 p,m. It is found that the contents of iron and phosphorus are not evenly distributed in the ultra-fine powders, meaning that the effective dissociation of iron and phosphor- us elements is achieved in the ore. Then a fluidization device for pneumatic separation was designed and manufactured to investigate the fluidization characteristics of the uhra-fine powders. The result shows that the ultra-fine powders have different fluidization characteris- tics from the conventional particles, and this provides basic parameters for the pneumatic separation of iron and phosphorus. Based on the different densities of Fe-rich or P-rich materials, an experimental facility of pneumatic separation can be designed and manufactured, and preliminary make iron and phosphorus separated from the ultra-fine high-phosphorus hematite.