Preparation and Performance of Ternesite-Ye’Elimite Clinker Produced from Steel Slag at Lower Temperature  

作　　者：Zhengyang Li Wei Guo Yueyang Hu Xiao Wang Binbin Qian Cuifeng Jiang 

机构地区：[1]Materials Science&Engineering,Yancheng Institute of Technology,Yancheng,224001,China [2]Department of Chemical Engineering,Monash University,Melbourne,3800,Australia

出　　处：《Journal of Renewable Materials》2022年第11期2921-2935,共15页可再生材料杂志（英文）

基　　金：the financial support of the National Natural Science Foundation of China(Grant No.51872252);the Postgraduate Research&Practice Innovation Program of Jiangsu Province,China(Grant No.SJCX201356).

摘　　要：Ternesite(4CaO·2SiO_(2)·CaSO_(4))-Ye’elimite(3CaO·3Al_(2)O_(3)·CaSO_(4))(simplified as TY)cement clinker was successfully prepared from steel slag at 1200℃in this study.XRD,TG/DSC and SEM were used to analyze the mineral composition and hydration products of the TY clinker.The sintering process and hydration mechanism of the TY clinker were investigated.Results show that a large amount of ternesite and ye’elimite have been formed at 1200℃,while ternesite has not been decomposed.Clinker minerals include ternesite,ye’elimite,gypsum and a small amount of iron phase.Iron phase from steel slag can promote the formation of liquid phase with the presence of gypsum at 1200℃and thus lead to the coexistence of ternesite and ye’elimite.The compressive strength of TY cement cured at 28 d is 59.5 MPa,which is higher than that of P.II 42.5 cement.This research provides a sustainable and energy-effective way for the reutilization of steel slag,an otherwise valueless waste.

关 键 词：Liquid phase low temperature calcination steel slag ternesite waste utilization ye’elimite 

分 类 号：TQ172.4[化学工程—水泥工业]