鞍山式赤铁矿石反浮选尾矿铁品位偏高机制

针对鞍山式赤铁矿石反浮选流程中存在的浮选尾矿铁品位偏高的问题，借助X射线衍射分析、化学多元素分析、粒度分析、扫描电子显微镜等检测手段，对选别流程中样品的化学多元素组成、物相组成、粒度分布及矿物的单体解离度进行了研究.结果表明，在各扫选尾矿中存在着一些单体解离高的微细铁矿物颗粒，其吸附在粗粒级脉石矿物表面，形成“载体浮选”进入到尾矿中，造成尾矿铁品位偏高.

Mechanism for Higher Iron Grade of Reverse Flotation Tailings of Anshan Type Hematite Ore

For the high iron grade in tailings of Anshan type hematite reverse flotation process， chemical element composition， phase composition， particle size distribution and mineral dissociation degree of samples collected from reverse flotation process were carried out by means of X ray diffraction analysis， chemical element analysis， granularity analysis and scanning electron microscope. The results show that some highly dissociated superfine iron minerals exist in scavenging tailings， which adsorb on some coarse gangue minerals to form “carrier flotation” and entered into tailings along with the carrier， and cause the higher iron grade of tailings.