温度对精炼渣碳酸化效果影响分析  

Influence of Temperature on Carbonation Effect of Refining Slag

作　　者：方明航 伊元荣[1,2,3] 马文青 马忠乐 白书齐 蔺悦 杜昀聪 FANG Minghang;YI Yuanrong;MA Wenqing;MA Zhongle;BAI Shuqi;LIN Yue;DU Yuncong(College of Resources and Environmental Sciences,Xinjiang University,Urumqi 830046,China;Key Laboratory of Oasis Ministry of Education,Xinjiang University,Urumqi 830046,China;Key Laboratory of Smart City and Environmental Modeling Autonomous Region,Urumqi 830046,China)

机构地区：[1]新疆大学资源与环境科学学院,乌鲁木齐830046 [2]新疆大学绿洲教育部重点实验室,乌鲁木齐830046 [3]智慧城市与环境建模自治区高校重点实验室,乌鲁木齐830046

出　　处：《硅酸盐通报》2020年第12期3905-3912,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51868072);新疆自然科学基金(2017D01C024)。

摘　　要：为了有效改善精炼渣的安定性及致密性问题,采用正交试验探讨精炼渣碳酸化过程,以温度为单一影响因素,考察碳酸化粒度分布,结合XRD,SEM,FT-IR,TG-DTA等手段对精炼渣碳酸化效果进行探讨。结果表明,精炼渣碳酸化各因素主次关系为:粒径>CO 2通气量>反应温度>转速>液固比;碳酸化后精炼渣中f-CaO、Ca 2SiO 4、Ca 3SiO 5、12CaO·7Al2O3消失,CaCO 3晶型增加明显,且以方解石为主;不同温度(20℃、40℃、60℃、80℃)碳酸化后精炼渣总的热分解失重百分率分别为:35.26%、35.24%、34.36%和27.29%。With the orthogonal tests,the refining slags carbonation process to improve their stability and compactness effectively were researched.In the experiments in which the temperature was the dependent variable,the size distribution of carbonation was investigated.XRD,SEM,FT-IR,and TG-DTA were used to study the refining slags carbonation effect.The results show the factors in the carbonation of refining slags with descending significance:particle size,CO 2 ventilation,reaction temperature,rotating speed,and liquid-solid ratio.After carbonation,f-CaO,Ca 2SiO 4,Ca 3SiO 5,and 12CaO·7Al2O3 in the refining slags disappeare,which are replaced with calcite-dominated crystalline CaCO 3.After carbonation at different temperatures(20℃,40℃,60℃,and 80℃),the total percentage of weight loss in the thermal decomposition of refining residue are 35.26%,35.24%,34.36%,and 27.29%,respectively.

关 键 词：精炼渣 碳酸化效果 温度 正交试验 表征分析 

分 类 号：TF524[冶金工程—钢铁冶金]