摘要
以特殊钢钢渣、炭黑、促进剂、硫磺、氧化锌、硬脂酸与复合橡胶制备特殊钢钢渣基复合橡胶.测试了内辐射指数、外辐射指数、安定性、拉伸强度、撕裂强度、拉断伸长率、邵尔A硬度、极限氧指数、燃尽时间、浸出液中重金属浓度、矿物组成、粒径分布、导热系数、孔结构、化学成分、微观形貌和热稳定性.研究了特殊钢钢渣作为橡胶功能填料的可行性与环境风险.结果表明:特殊钢钢渣的矿物组成为Ca2SiO4、Ca3Al6Si2O16、(Fe,Mn)2SiO4、Ca3Al2(SiO4)3、Na2TiSiO5、CuMn6SiO12、Na2SiO5、Pb3Ta2O8、Pb3SiO7等金属固熔体,特殊钢钢渣具有良好的粒径分布,其安全性与安定性满足相关国标的要求.特殊钢钢渣基复合橡胶中特殊钢钢渣掺量为20%~40%时,特殊钢钢渣基复合橡胶的拉伸强度为20.0~21.5 MPa、撕裂强度为45.2~48.6 kN·m-1、拉断伸长率为475%~501%、邵尔A硬度为63.5~65.3、极限氧指数为18.5~18.6、燃尽时间为264~292 s、导热系数为0.15~0.17 W·m-1·K-1.特殊钢钢渣的主要重金属氧化物为Cr2O3、PbO和CuO,且以稳定的金属固熔体存在,特殊钢钢渣基复合橡胶中Cu、Zn、Cd、Pb、Cr、Ba、Ni、As等重金属浸出浓度远低于危险废物鉴别标准限值,因此将特殊钢钢渣作为橡胶功能填料安全、可行.
The utilization of high-value-added metallurgical solid waste, such as the use of an inexpensive specialty-steel slag as a rubber functional filler, is an important sustainable development strategy. In this study, we prepared specialty-steel slag-based rubber composites from specialty-steel slag, carbon black, an accelerator, sulfur, zinc oxide, stearic acid, and compound rubber. Then we conducted tests to determine the internal exposure index, external exposure index, stability, tensile strength, tear strength, elongation at break, shore A hardness, limiting oxygen index, burnout time, leaching concentration of heavy metals, mineral composition, particle size distribution, heat conductivity coefficient, pore structure, chemical composition, microstructure, and thermal stability of the composites.We also studied the feasibility and environmental risk associated with using specialty-steel slag as a rubber functional filler. The results show that the mineral composition of the specialty-steel slag includes Ca2SiO4, Ca3 Al6Si2O16,(Fe, Mn)2 SiO4, Ca3 Al2(SiO4)3, Na2 TiSiO5, CuMn6 SiO12, Na2 SiO5, Pb3 Ta2 O8, Pb3 SiO7, and other solid metal melts. This slag also has a good particle size distribution, and its safety and stability meet the requirements of relevant national standards. When the content of the specialty-steel slag in specialty-steel slagbased rubber composites ranges between 20%–40%, these composites have a tensile strength ranging from 20.0 –21.5 MPa, a tear strength of 45.2–48.6 kN·m-1, an elongation at break value of 475%–501%, a shore A hardness of 63.5–65.3, a limiting oxygen index of18.5–18.6, a burnout time of 264–292 s, and a heat conductivity coefficient of 0.15–0.17 W·m-1·K-1. The main heavy-metal oxides in the specialty-steel slag are identified as Cr2O3, PbO, and CuO, which mainly exist as stable solid metals. In addition, the leaching concentration of the heavy metals, such as Cu, Zn, Cd, Pb, Cr, Ba, Ni, and As, from the specialty-steel slag-based rubber composites is much lower than the limit value of the hazardous-waste identification standards. Therefore, specialty-steel slag is safe and feasible for use as a rubber functional filler.
作者
张浩
李海丽
高青
陈成
ZHANG Hao;LI Hai-li;GAO Qing;CHEN Cheng(School of Civil Engineering and Architecture,Anhui University of Technology,Maanshan 243032,China;Key Laboratory of Metallurgical Emission Reduction&Resources Recycling(Anhui University of Technology),Ministry of Education,Maanshan 243002,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2020年第5期628-634,共7页
Chinese Journal of Engineering
基金
中国博士后科学基金资助项目(2017M612051)
高校优秀青年骨干人才国外访学研修资助项目(gxgwfx2018021)
安徽省博士后研究人员科研活动经费资助项目(2017B168)
冶金减排与资源综合利用教育部重点实验室(安徽工业大学)资助项目(KF17-08)
安徽省级大学生创新创业训练计划资助项目(201810360266,S201910360240)。
关键词
特殊钢钢渣
功能填料
复合橡胶
安全性
炭黑
specialty-steel slag
functional filler
compounded rubber
safety
carbon black
