含硼铁精矿钠化还原焙烧硼/铁高效分离应用基础研究

Paigeite ore in Fengcheng Liaoning Province as an endemic mineral resource of China, accounting for 58% of the boron reserves, which will be the main raw material of the boron industrial in the future. However, Paigeite it has not been exploited on a large scale for its complex structure, low boron grade, and ferro-boron difficult to separate. To achieve the Ferro-boron efficient separation of boron bearing iron concentrate obtained from Paigeite, a new process, the reduction of magnetite and the Na-activation of camsellite simultaneously, are proposed. The project intended to study the thermodynamics, thermodynamics and the phase and microstructure change in the roasting system with XRD, MLA, SEM and other advanced testing equipment, using of metallurgy, mineral processing and chemical multidisciplinary research methods. And then depth analysis the process of magnetite reduction and camsellite Na-activation, reveal the law and mechanism of interaction between direct reduction roasting and roasting with sodium, achieve coupled regulation of the process between reduction of magnetite reduction and camsellite Na-activation, substantial increase in resource utilization, strengthen ferro-boron separation efficiency, which provide a theoretical basis for the low-cost, short process, ferro-boron efficient and clean separation technology.

辽宁凤城硼铁矿作为我国特有的硼资源，占全国储硼量的58%，是我国今后硼工业的主要原料。但是，由于其矿石结构复杂，品位低，硼铁分离困难，至今未得到大规模有效开发利用。本项目针对硼铁矿的主要产品之一含硼铁精矿硼/铁高效分离难题，提出了碳还原提铁与钠化焙烧提硼耦合新方法。借助XRD、MLA、SEM等先进检测设备，运用选矿、冶金和化工多学科交叉研究方法，研究含硼铁精矿主要矿物在焙烧体系中反应热力学特性、动力学规律、硼和铁的相结构演变规律，深度解析铁矿石直接还原-磁选分离提取金属铁、含硼矿物钠化活化提取硼的新过程，揭示铁矿石直接还原焙烧与含硼矿物钠化焙烧的相互影响规律和机理，实现铁的还原与硼的活化过程的耦合调控，强化硼铁分离效率，大幅度提高资源利用率，为含硼铁精矿低成本、短流程、硼铁高效清洁分离新技术提供理论基础。

项目以含硼铁精矿为研究对象，针对含硼铁精矿中硼/铁高效分离难题，提出了碳还原提铁与钠化焙烧提硼耦合新方法。运用选矿、冶金和化工多学科交叉研究方法，研究含硼铁精矿主要矿物在焙烧体系中反应热力学特性、动力学规律、硼和铁的相结构演变规律，深度解析铁矿石直接还原—磁选分离提取金属铁、含硼矿物钠化活化提取硼的新过程，揭示铁矿石直接还原焙烧与含硼矿物钠化焙烧的相互影响规律和机理，实现铁的还原与硼的活化过程的耦合调控，强化硼铁分离效率，大幅度提高资源利用率，为含硼铁精矿低成本、短流程、硼铁高效清洁分离新技术提供理论基础