Properties of boron-rich slag separated from boron-bearing iron concentrate  

含硼铁精矿熔分富硼渣基础特性研究（英文）

作　　者：WANG Guang WANG Jing-song XUE Qing-guo 王广;王静松;薛庆国

机构地区：[1]State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing

出　　处：《Journal of Central South University》2018年第4期783-794,共12页中南大学学报（英文版）

基　　金：Project(FRF-TP-16-019A1)supported by the Fundamental Research Funds for the Central Universities,China;Project(51274033)supported by the National Natural Science Foundation of China

摘　　要：In the present paper,the fundamental research on the properties of boron-rich slag melting separated from boron-bearing iron concentrate was performed.The melting and fluidity of B2O3–MgO–SiO2–FeO slag system,crystallization of separated boron-rich slag and factors on the extraction efficiency of boron-rich slag were systematically investigated.B2O3 content would heavily affect the melting and fluidity property of boron-rich slag.Generally,FeO could improve the melting and fluidity property of boron-rich slag.Boron-containing crystalline phase mainly precipitated in temperature range from 1200°C to 1100°C.Higher smelting temperature and B2O3 reduction ratio were negative for the extraction of boron.The cooling rate of 10–20°C/min was better for the crystallization of boron-containing crystalline phase.Based on the obtained experimental results,the optimum operating parameters for the development of pyrometallurgical boron and iron separation process and further boron-rich slag cooling process were proposed.本文针对含硼铁精矿熔分所得富硼渣的基础特性进行了基础研究,具体包括:B_2O_3–MgO–SiO_2–FeO渣系的熔化和流动特性、熔分富硼渣的结晶行为和不同因素对富硼渣浸出率的影响。B_2O_3含量对富硼渣的熔化和流动特性有显著影响。总体上,FeO可以提高富硼渣的熔化和流动性;缓冷过程中含硼晶相主要在1200°C–1100°C这一温度区间析出;过高的熔炼温度和B_2O_3还原率对富硼渣中硼的提取不利;适宜的富硼渣缓冷速率为10°C/min–20°C/min。基于上述试验结果,可以为硼铁精矿中硼–铁火法分离及后续富硼渣缓冷工艺的开发提供优化参数。

关 键 词：boron-bearing iron concentrate boron-rich slag MELTING FLUIDITY CRYSTALLIZATION 

分 类 号：TD951[矿业工程—选矿]