Abstract

It is shown that a rotary vortex thermal unit can be used in order to produce a high quality gypsum binder (fast-setting A grade gypsum) including the utilization of gypsum-containing wastes taken from gas cleaning facilities, with obtaining a marketable product and reducing the accumulation of solid wastes, which should promote solving economic and environmental problems. By varying the maximum roasting temperature and the holding time, controlling both the binding properties of gypsum and its strength has been achieved. These properties are inversely related: as the roasting temperature increases, the binding properties get improved, whereas the strength of the hardened mortar exhibit a decrease. Increasing high-temperature exposure time, on the contrary, leads to worsening gypsum binding properties and improving gypsum strength properties.

中文翻译：

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使用旋转涡流装置获得石膏粘合剂的技术潜力

摘要

结果表明，旋转涡流加热装置可用于生产高质量的石膏粘合剂（速凝 A 级石膏），包括利用从气体净化设施中取出的含石膏废物，获得适销对路的产品并减少固体废物的积累，将促进解决经济和环境问题。通过改变最高焙烧温度和保温时间，可以同时控制石膏的粘合性能和强度。这些特性是成反比的：随着焙烧温度的升高，粘结性能得到改善，而硬化砂浆的强度则表现出下降。相反，增加高温暴露时间会导致石膏粘合性能变差并提高石膏强度性能。