磷石膏用作水泥缓凝剂时，其中含有的杂质对水泥的性能产生不利影响，因此使其应用受到限制。
Impurities from phosphogypsum had deleterious effect on the property of cement when used as cement retarder, which caused limited application.
通过大量的化验室小磨配比试验，研究了脱硫石膏代替天然二水石膏作水泥缓凝剂对普通水泥、矿渣水泥各项性能的影响。
After many grinding mixture ratio tests in laboratories, the paper studies the effect on ordinary cement and slag cement of desulfurized gypsum as cement retarder, instead of raw gypsum.
在水泥中加入磷石膏做缓凝剂，对凝结时间影响较大，但对强度影响不太明显；
Phosphorous gypsum makes cement condensation time prolonged, while give no evidence influence on cement strength.
热电厂脱硫石膏与天然二水石膏相似，适合作水泥缓凝剂。
The FGD gypsum similar to the natural gypsum in common characteristics, and is adequately used as cement retarder.
简要叙述了磷石膏利用的基本概况，介绍了几种各具特色的磷石膏制水泥缓凝剂的生产工艺流程，以及作者的实验流程。
The application status of phosphogypsum is presented. Some processes of producing cement retarder by phosphogypsum including author's experimental process are introduced.
杂质对水泥性能影响不大，不经预处理作水泥缓凝剂，其性能与采用天然石膏的水泥相当。
The properties of cement with titanium gypsum are similar to those of Portland cement with natural gypsum.
脱硫石膏作水泥缓凝剂必须低温烘干。
The FGD gypsum should be dried at low temperature for the use of cement retarder.
研究结果表明：用化工石膏作缓凝剂，水泥性能符合国家标准规定。
Results show that, as the chemical gypsum was used as retarder, the cement properties can meet the requirements of the national standard.
目前研究显示磷石膏经预处理后，凝结时间和强度能满足使用要求，但并不能说明磷石膏作为缓凝组分就能与水泥熟料很好适应。
Condensation time and strength of cement with pretreated phosphogypsum could match the standard, but the compatibility of phosphogypsum with clinker was quite different.
这种固化石膏可以用于水泥缓凝剂和建筑石膏的原材料。
The cured gypsum can be used as the raw material of a cement retarder and building gypsum.
这种固化石膏可以用于水泥缓凝剂和建筑石膏的原材料。
The cured gypsum can be used as the raw material of a cement retarder and building gypsum.
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