Al_2O_3含量对提铁后的钢渣及粉煤灰微晶玻璃结构与性能的影响  

Influence of Al_2O_3 content on structure and properties of glass-ceramics prepared with steel slag extracted iron and fly ash

作　　者：杨志杰[1] 李宇[1] 苍大强[1] 刁美玲[1] 郭文波[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《环境工程学报》2012年第12期4631-4636,共6页Chinese Journal of Environmental Engineering

基　　金："十二五"国家科技支撑重大项目(2011BAC06B10);国家自然科学基金重点项目(51034008);广东省教育部产学研结合项目(2010A080804005);粤港关键领域重点突破项目(2010Z52102)

摘　　要：为了实现熔融态钢渣的"渣"和"热"高附加值双利用,提出了将熔融提铁后钢渣制备成高附加值微晶玻璃的研究思路。采用DTA、XRD、SEM和EDS等手段研究了Al2O3含量对提铁后钢渣微晶玻璃的影响,结果显示随Al2O3含量的增大微晶玻璃析晶温度逐渐升高,并且主晶相由假硅灰石转变为铝黄长石,最终转变为钙长石。Al2O3含量为15%时微晶玻璃的力学性能较好,其抗弯强度、显微硬度、抗压强度分别达到了49.85 MPa、3.52 GPa和181.47 MPa,同时钢渣和粉煤灰的利用率分别高达56%和36%。In order to utilize the slag and heat energy of the molten steel slag, the glass-ceramics with high-additional-value was prepared using the steel slag extracted iron by smelting reduction process. The in- fluence of Al2O3 content on glass-ceramics was investigated by means of DTA, XRD, SEM and EDS. The results showed that the crystallization temperature gradually increased and the main crystal phase of glass-ce- ramics transformed from pseudo-wollastonite to akermanite and then transformed into anorthite with increase of Al2O3 content. Meanwhile, mechanical properties of glass-ceramics was better when Al2O3 content was 15%, its bending strength, microhardness and compression strength were 49. 85 MPa,3.52 GPa and 181.47 MPa, respectively. Meanwhile, the utilization rates of steel slag and fly ash reached to 56% and 36% , respectively.

关 键 词：钢渣 粉煤灰 微晶玻璃 AL2O3 

分 类 号：TF09[冶金工程—冶金物理化学]