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针对目前采用的电石泥烟气脱硫技术,研究了亚硫酸钙含量较多的电石泥脱硫渣对于水泥力学性能、凝结时间的影响,并分别与经氧化处理后的脱硫渣、脱硫石膏进行了对比分析。结果表明:电石泥脱硫渣的主要成分为亚硫酸钙、硫酸钙及未充分反应的氢氧化钙,其对水泥的凝结时间可以起到一定的调节作用,但亚硫酸钙含量直接影响水泥的力学性能及凝结时间;经过氧化处理后的电石泥脱硫渣可以作为水泥缓凝剂用于水泥生产中,有利于水泥后期强度的增长。
Aiming at the current technology of calcium carbide flue gas desulfurization, the influence of calcium carbide desulfurization residue with more content of calcium sulfite on the mechanical properties and setting time of cement was studied, and compared with the desulfurized slag and gypsum after oxidation respectively analysis. The results show that the main components of calcium carbide desulfurization slag are calcium sulfite, calcium sulfate and unreacted calcium hydroxide, which can regulate the setting time of cement. However, the content of calcium sulfite directly affects the mechanics of cement Performance and setting time; After the oxidation of calcium carbide desulfurization residue can be used as a cement retarder for cement production, is conducive to the growth of cement strength.