物化耦合激发煤气化渣活性研究  

Research on Activation of Coal Gasification Slag with Physical and Chemical Coupling Excitation

作　　者：胡维扬 郭育霞[1,2] 白晨阳 史昀辑 万颖 HU Weiyang;GUO Yuxia;BAI Chenyang;SHI Yunji;WAN Ying(College of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan,Shanxi 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]山西浙大新材料与化工研究院,山西太原030024

出　　处：《矿业研究与开发》2024年第11期283-290,共8页Mining Research and Development

基　　金：国家自然科学基金联合基金重点项目(U23A20131);国家杰出青年科学基金项目(51925402);山西-浙大新材料与化工研究院技术开发项目(2022SX-TD007)。

摘　　要：煤气化渣(CGS)含有丰富硅铝成分,具有潜在的火山灰活性,但硅铝氧化物成分多为晶态,阻碍了其资源化利用。为了探究物化耦合激发对CGS活性的影响,采用粒度分析、黏度、凝结时间、抗压强度和活性指数评估不同激发条件下的CGS活性激发效果,同时通过SEM和XRD分析煤气化渣充填材料的微观结构和物质组成,探究CGS的激发机理。结果表明:物化耦合激发效果优于单一物理激发,CGS最佳激发方案为粉磨时间为100 min、Na_(2)SO_(4)掺量为2.5%或粉磨时间为100 min、Na_(2)SiO_(3)掺量为7%,活性指数相较于单一物理激发分别提高7.13%和7.72%;物化耦合作用促进晶态硅铝离子转变为无定形态,促进水化产物的形成,可提高CGS活性。Coal gasification slag(CGS)contains abundant silicon-aluminum components and has potential pozzolanic activity,but the silicon-aluminum oxide components are mostly crystalline,which hinders its resource utilization.In order to explore the effect of physical and chemical coupling excitation on the activity of CGS,particle size analysis,viscosity,coagulation time,compressive strength,and activity index were used to evaluate the activity excitation effect under different excitation conditions.At the same time,SEM and XRD were used to analyze the microstructure and material composition of coal gasification slag filling materials,and to investigate the excitation mechanism of CGS.The results show that physical and chemical coupling excitation is more effective than single physical excitation.The optimal excitation condition for CGS is milling time of 100min and Na_(2)SO_(4) dosage of 2.5%or milling time of 100min and Na_(2)SiO_(3) dosage of 7%.The activity index of physical and chemical coupling excitation under above optimal conditions can be increased by 7.13%and 7.72%compared to that of single physical excitation.The physical and chemical coupling promotes the transformation of crystalline silicon-aluminum ions into amorphous form,which can stimulates the formation of hydration products and enhance activity of CGS.

关 键 词：煤气化渣 物化耦合激发 火山灰活性 水化产物 

分 类 号：TD844[矿业工程—煤矿开采] TQ54[矿业工程—矿山开采]