从硼泥中提取硅、硼的新工艺  

New Technology for Extracting Silicon and Boron from Boron Mud

作　　者：宁志强 宋雨陶 赵润宇 韩帅男 NING Zhi-qiang;SONG Yu-tao;ZHAO Run-yu;HAN Shuai-nan(School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2022年第7期959-965,共7页Journal of Northeastern University(Natural Science)

基　　金：“十三五”国家重点研发计划项目(2017YFB0305401).

摘　　要：以硼泥为原料,硼泥与碳酸钠混合后在900℃下焙烧2 h,采用碱浸法回收焙烧后硼泥中的SiO_(2)和B_(2)O_(3).通过TG-DSC曲线分析了焙烧阶段的反应过程.通过单因素试验研究了碱浸阶段:n(NaOH)/n(SiO_(2))、反应温度、反应时间、液固质量比等条件对硼泥中的SiO_(2)和B_(2)O_(3)提取率的影响.通过正交试验,确定了影响SiO_(2)提取率各因素之间的主次关系依次为:n(NaOH)/n(SiO_(2))>液固质量比>反应时间>反应温度,影响B_(2)O_(3)提取率各因素之间的主次关系为:反应时间>反应温度>n(NaOH)/n(SiO_(2))>液固质量比.最佳的回收条件:n(NaOH)/n(SiO_(2))为25,反应温度为50℃,反应时间为40 min,液固质量比为8,在此条件下SiO_(2)的提取率为83.11%,B_(2)O_(3)的提取率为75.28%.Taking boron mud as raw material,the boron mud mixed with sodium carbonate was roasted at 900℃for 2 h,and the SiO_(2)and B_(2)O_(3)in the roasted boron mud were recovered by alkaline leaching method.The reaction in the calcination stage was analyzed by TG-DSC curve.The effects of n(NaOH)/n(SiO_(2)),reaction temperature,reaction time and liquid-solid mass ratio on the extraction ratios of SiO_(2)and B_(2)O_(3)in boron mud were studied by single factor experiment.By orthogonal experiment,the order of factors affecting the extraction ratio of SiO_(2)was determined as n(NaOH)/n(SiO_(2))>liquid-solid mass ratio>reaction time>reaction temperature,and the order of factors affecting the extraction ratio of B_(2)O_(3)was reaction time>reaction temperature>n(NaOH)/n(SiO_(2))>liquid-solid mass ratio.The optimum recovery conditions were n(NaOH)/n(SiO_(2))of 25,reaction temperature of 50℃,reaction time of 40 min,and liquid-solid mass ratio of 8.Under these conditions,the extraction ratios of SiO_(2)and B_(2)O_(3)reached 83.11%and 75.28%,respectively.

关 键 词：硼泥 二氧化硅 氧化硼 碳酸钠 氢氧化钠 

分 类 号：TP110.9[自动化与计算机技术—控制理论与控制工程]