【摘要】 为提高磷石膏在水泥中的有效利用,分析磷石膏对水泥性能的影响,采用红外吸收光谱、色质联谱等测试手段对磷石膏中有机物进行定性和定量分析,并研究有机物对水泥性能的影响。结果表明,磷石膏中有机物为乙二醇甲醚乙酸酯、异硫氰甲烷、3-甲氧基正戊烷、2-乙基-1,3-二氧戊烷。有机物主要以物理吸附形式分布在石膏晶体表面,含量约为0.1%~0.2%。它使水泥凝结时间延长,强度降低,尤其是28天抗压强度有较大的下降,通过浮选处理可清除。更多还原

【Abstract】 For utilizing phosphogypsum effectively in cement,by measurement techniques such as infrared spectrum and color-mass spectrum et al,organic matters in phosphogypsum were analyzed qualitatively and quantitatively.Their influence on the properties of cement was also investigated.The results showed that organic matters in phosphogypsum were mainly C₅H₁₀O₃,C₂H₃O₅,C₆H₁₄O,C₅H₁₀O₂.They were physically adsorbed on the surface of phosphogypsum crystals and their content fell within the range of about 0.1%～0.2%.The presence of organic matters increased the setting time of cement and reduced the strength,particularly remarkablely in the 28 days compressive strength.Their influence could be cleaned out by floating pretreatment.更多还原