皮江法炼镁镁渣的回收处理  

Reclaim and treatment of magnesium slag from pidgeon process

作　　者：韩凤兰[1] 杨奇星 吴澜尔[1] 郭生伟[1] 

机构地区：[1]北方民族大学材料科学与工程学院,宁夏银川750021 [2]吕勒奥理工大学矿物和金属回收循环研究中心

出　　处：《无机盐工业》2013年第7期52-55,共4页Inorganic Chemicals Industry

基　　金：十二五支撑计划(2012BAC12B05);973前期研究专项(2011CB612208)

摘　　要：取自宁夏惠冶镁业的镁渣粉体经过改质,提高其体积稳定性后可作为建筑材料。将镁渣与硼酸盐混合,压制成块,然后高温烧结。扫描电子显微镜研究表明,在较高温度下硅酸多晶型物中因为加入的硼酸盐中的钠离子和硼离子而稳定。镁渣中自由氧化镁的含量也随着烧结过程的进行而减少。混合质量分数为0.4%～0.6%硼酸盐的炼镁还原渣在1 200℃烧结5～6 h后,变成体积稳定的结合体。可以将处理过的镁渣用于建筑材料,在制镁过程中节省宝贵的自然资源,减缓全球气候变暖。Magnesium slag powder from Ningxia Huiye Magnesium Industry Co.,Ltd.was treated to improve the volume stability for its application in building materials.The slag was mixed with borates,pressed into briquettes,and then sintered at high temperature.SEM studies showed that under higher temperature Ca2SiO4polymorphs were stabilized by Na and B ions in the added borates.The free MgO content in the slag was also decreased by the sintering treatment.The slag powder,after mixing with 0.4%～0.6%（mass fraction） of borates and sintering at 1 200 ℃ for 5～6 h,became volume stable aggregates.It is then possible to use the treated slag in building materials,saving valuable natural resources and decreasing the global warming impact in magnesium production via Pidgeon process.

关 键 词：镁 硼酸盐 皮江法 稳定性 建筑材料 

分 类 号：TQ132.2[化学工程—无机化工]