含硼铁精矿选择性还原-选分新工艺的实验研究

针对现有含硼铁精矿硼铁分离工艺所存在的弊端，提出了含硼铁精矿选择性还原-选分新工艺，并通过热力学分析和实验室研究进行了验证.研究表明:对于辽宁凤城Fe和B2O3质量分数分别为5605%和386%的含硼铁精矿，最佳的选择性还原-选分工艺参数如下:配碳比08~10，还原温度1275~1300℃，还原时间不小于20min，还原煤粒度为-0075mm，分选时的磁场强度为50mT.得到的选分产物为高金属化率的金属铁粉，可进一步处理用于钢铁生产；选分尾矿为高品位的含硼资源，可作为硼工业的优质原料.

Experimental Study on New Process for Selective Reduction and Separation of Boron-Bearing Iron Concentrate

In view of disadvantages of present boron and iron separation technology， a new process for selective reduction and separation of the boron bearing iron concentrate was proposed， which was verified by the thermodynamic feasibility analysis and laboratory tests. The laboratory experiments indicated that for the boron bearing iron concentrate in Fengcheng city of Liaoning province with Fe and B2O3 mass fraction of 5605% and 386%， respectively， the optimized parameters of selective reduction and separation were as followed: the carbon ratio 08~ 10， the reduction temperature 1275~1300℃， the reduction time no less than 20min， the particle size of coal about 0075mm and the magnetic field strength of the separation 50mT. The selected product was the iron powder with high metallization， which could be used in steel production through further processing. The tailings of separation were high grade sources containing boron， which could be used as the superior raw material in boron industry.