摘要
以钢渣为主要原料,添加少量黏土和造孔剂制备陶粒,对钢渣陶粒和钢渣的理化性能、除磷效果、等温吸附特征做了对比。结果发现,钢渣陶粒具有质轻、多孔等特征,除磷效果明显优于钢渣。在20℃条件下,两种材料对磷的等温吸附均符合Langmuir模型,钢渣陶粒的理论最大吸附量是钢渣的3.3倍。对除磷失效的钢渣陶粒和钢渣进行XRF检测和化学分析,结果表明,两种材料对磷的去除都以生成磷酸钙沉淀为主,前者所含的磷酸二钙型产物比例较高。
Slag ceramisites were made from steel slag,as well as a small percentage of clay and pore forming materials.Slag ceramisites were compared with raw steel slag in physicochemical property,phosphate removal efficiency,and isotherm adsorption.Results showed that slag ceramisites were light and porous,with higher phosphate removal rate.The isotherm adsorption data of both slag ceramisites and steel slag followed the Langmuir model at 20 ℃,however the maximum adsorption capacity of the former was 3.3 times of steel slag.X-ray fluorescence（XRF） and chemical extractions were performed on both slag ceramisites and raw steel slag,results showed that Ca2＋released from both materials to form phosphate precipitates was the most significant P removal mechanism achieved.Additionally,dicalcium phosphate was much higher in the exhausted slag ceramisites than steel slag.
出处
《无机盐工业》
CAS
北大核心
2014年第8期55-58,共4页
Inorganic Chemicals Industry
基金
河北省科技计划项目(12273607)
关键词
钢渣
除磷
等温吸附
化学提取
steel slag
phosphate removal
isotherm adsorption
chemical extraction
