【作者】 李井成； 张维斯； 雷国元； Wang Qiaozhi；

【Author】 Zhang Weisi;Li Jingcheng;Wang Qiaozhi;Lei Guoyuan;College of Resources and Environmental Engineering,Wuhan University of Science and Technology;Sintering branch of ironmaking plant of Wuhan Iron and Steel Co.,Ltd.;

【机构】 武汉钢铁有限公司炼铁厂； 武汉科技大学资源与环境工程学院； College of Resources and Environmental Engineering,Wuhan University of Science and Technology；

【摘要】 半干法脱硫灰（SDA）因其成份复杂和含量较高的CaSO₃,综合利用难度大。以粉煤灰、SDA为主要原料,非蒸压养护条件下制备附加值较高的轻质节能墙材。考察了原料配比对产品性能的影响,结果表明:SDA为35、40%,产品28d抗压强度分别为9.2、6.3MPa,主要性能指标满足"GB/T23450—2009建筑隔墙用保温条板"的要求。采用XRD、SEM、FITR等分析检测手段进行的机制研究表明:粉煤灰中的SiO₂和Al₂O₃与SDA中Ca（OH）₂、CaSO₄和CaSO₃反应生成的水化硅酸钙凝胶（C-S-H）、钙矾石（AFt）和3CaO·Al₂O₃·CaSO₃·11H₂O,是主要的强度粘结相。该研究突破了SDA传统的"预氧化-再利用"的技术思想,其理论机制对SDA应用途径的扩展具有重要的指导作用。更多还原

【Abstract】 Semi-dry desulfurization ash（SDA） is difficult to comprehensively utilize due to its complex composition and high content of CaSO₃.Using fly ash and raw SDA as the main materials,light-weight energy-saving wall materials with high added value was prepared under non-autoclave curing conditions.The influence of raw material ratio on product performance was investigated.The results showed that the SDA were 35% and 40%,and the compressive strength of the product after 28 days were 9.2 and 6.3 MPa respectively.The main performance indicators met the requirements of "GB/T23450-2009 Thermal Insulation Strips for Building Partition Walls".Mechanism studies by analysis methods such as XRD,SEM,FI-TR etc.show that the hydrated calcium silicate gel（C-S-H）,ettringite（AFt） and 3 CaO·Al₂O₃·CaSO₃·11 H₂O formed by the reaction of SiO₂ and Al₂O₃ in fly ash with Ca（OH）2,CaSO₄ and CaSO₃ in SDA are the main strength binder phases.This research breaks through the traditional "preoxidation-reuse" technical idea of SDA,and its theoretical mechanism has an important guiding role for the expansion of SDA application pathways.更多还原