摘要
在节能减排和绿色发展的背景下,大量堆放的冶金固废对环境污染的问题亟待解决。针对不锈钢生产过程中排放的工业固废—镍铁渣与不锈钢尾渣,复掺粉煤灰、脱硫石膏,以7d活性和28d活性为性能指标,基于力学性能进行配比优化研究。结果表明:不锈钢尾渣和镍铁渣的掺入比例对于超细掺合料的活性影响最大,其次是粉煤灰的掺入量,脱硫石膏的掺入量对于活性的影响相对较小。比表面积超过600cm^(2)/g以后继续粉磨对活性提升不明显。综合考虑制备超细固废掺合料的配比为镍铁渣:不锈钢尾渣=8∶2,粉煤灰掺量为20%,SO_(3)的含量控制在3.0%,比表面积为600cm^(2)/g,此时超细掺合料的28d活性最高,7d活性80%,28d活性达91%。
In the context of energy conservation and sustainable development,it is imperative to address the environmental pollution resulting from the extensive accumulation of metallurgical solid waste.With a focus on industrial solid waste generated during stainless steel production-nickel iron slag and stainless steel slag,this study investigated the optimal blending proportions of powdered coal ash,desulfurization gypsum,and superfine slag based on mechanical properties as performance indicators.The findings indicate that the proportion of nickel iron slag and stainless steel slag added exerts the most significant influence on the activity of the superfine blended material,followed by the amount of powdered coal ash added.The impact of desulfurization gypsum addition is relatively minor.Grinding to a specific surface area exceeding 600cm^(2)/g does not notably enhance activity further.The optimal blending ratio for the superfine waste blending material is determined to be nickel iron slag:stainless steel slag=8∶2,with a powdered coal ash content of 20%,SO_(3)content at 3.0%,and specific surface area reaching 600cm^(2)/g.Under these conditions,the 28-day activity level of the superfine blended material reaches its peak,with an 80%activity at day 7 and a 91%activity at day 28.
作者
张永杰
董萱萱
赵欢
明阳
陈平
Zhang Yongjie;Dong Xuanxuan;Zhao Huan;Ming Yang;Chen Ping(School of Civil Engineering,Guilin University of Technology,Guilin,Guangxi 541000,China;Guangxi Engineering Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin,Guangxi 541000,China)
出处
《黑龙江工业学院学报（综合版）》
2024年第8期129-133,共5页
Journal of Heilongjiang University of Technology(Comprehensive Edition)
基金
广西建筑新能源与节能重点实验室开放基金项目(项目编号:桂科能22-J-21-24)。
关键词
镍铁渣
不锈钢尾渣
超细粉磨
掺合料
配合比
nickel iron slag
stainless steel tailings
ultra fine grinding
admixtures
mix proportion
