摘要
对工业铜渣进行了成分调节后的固相改质处理,借助光学显微镜、SEM、EDS、XRD对改质前后铜渣的矿物相变化进行了研究,并探索了改质工艺对磁选效果的影响作用。实验结果表明,固相改质处理能够使铜渣中弱磁性Fe2SiO4向强磁性(Mg,Fe) Fe2O4发生转变,后者可通过磁选有效分离。经过改质处理,铜渣的磁选产率和回收率都得到了显著提升,分别达到了57. 14%和83. 90%。MgO含量变化会对(Mg,Fe) Fe2O4相中的Fe3O4和MgFe2O4比例起到影响作用,随着S3、S2、S1中的MgO含量不断增加,(Mg,Fe) Fe2O4相中的Fe/Mg原子比呈现先降低后升高的趋势,由d2的2. 97变化至c2的2. 71后又改变为b2的2. 74。
The industrial copper slag was subjected to solid phase modification after composition adjustment. The mineral phase changes of copper slag before and after modification were studied by optical microscope,SEM,EDS and XRD,and the effect of modification on magnetic separation was explored. The experimental results show that the solid phase modification can transform the non-magnetic Fe2SiO4 to the ferromagnetic( Mg,Fe) Fe2O4 in the copper slag,the latter can be effectively separated by magnetic separation. After the modification treatment,the magnetic separation yield and recovery rate of the copper slag have been significantly improved,reaching 57. 14% and 83. 90% respectively. The change of MgO content will affect the ratio of Fe3O4 and MgFe2O4 in( Mg,Fe) Fe2O4 phase. With the increase of MgO content in S3,S2 and S1,the Fe/Mg atomic ratio in the( Mg,Fe) Fe2O4 phase first decreases and then increases. It changes from2. 97 of d2 to 2. 71 of c2 and then changes to b2 of 2.74.
作者
蒋亮
马良富
吴长松
吴婷
叶雨欣
陈宇红
韩凤兰
JIANG Liang;MA Liang-fu;WU Chang-song;WU Ting;YE Yu-xin;CHEN Yu-hong;HAN Feng-lan(School of Material Science and Engineering,North Minzu University,Yinchuan 750021,China;Key Laboratory of Powder Materials and Special Ceramics,North Minzu University,Yinchuan 750021,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第12期3767-3772,3787,共7页
Bulletin of the Chinese Ceramic Society
基金
宁夏自然科学基金(2019AAC03100)
国家自然科学基金(51964001)
“粉体材料与特种陶瓷”重点实验室开放基金(1804)
研究生教育创新计划项目(YXW201611)
宁夏科技支撑计划项目(2017EZ08)
关键词
铜渣
固相改质
磁选
尖晶石
copper slag
solid-phase modification
magnetic separation
spinel
