脱硫废液处理钢尾渣制备路面砖及其性能研究  

Preparation and performance of pavement brick based on steel slag treated with desulfurization waste liquid

作　　者：林春瑞 唐宁[1] 倪晓东 韩作宽 杨文广 LIN Chunrui;TANG Ning;NI Xiaodong;HAN Zuokuan;YANG Wenguang(School of Materials and Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Fushun New Steel Co.Ltd.,Fushun 113001,China)

机构地区：[1]沈阳建筑大学材料科学与工程学院,辽宁沈阳110168 [2]抚顺新钢铁有限责任公司,辽宁抚顺113001

出　　处：《新型建筑材料》2024年第8期64-68,82,共6页New Building Materials

基　　金：国家自然科学基金项目(52278453);兴辽英才计划项目(XLYC2007176)。

摘　　要：采用弱酸性脱硫废液对钢尾渣处理,设计和制备了钢尾渣基路面砖,通过离子色谱法、XRD、FTIR、TG-DSC分析了钢尾渣的微观组成,研究了不同预处理方法对钢尾渣基路面砖抗压、抗折强度及体积安定性的影响。试验结果表明:脱硫废液的pH值由浸泡钢尾渣前的5.70增至浸泡钢尾渣后的7.36;脱硫废液处理后,钢尾渣中f-CaO的含量降低25.3%,且钢尾渣的体积膨胀抑制效果明显,体积安定性增强;所制备的钢尾渣基路面砖力学性能及沸煮安定性均能满足设计要求。Weakly acidic desulphurization waste liquid was used to treat the steel tailings.Pavement bricks incorporating this treated steel tail slag were designed and fabricated.The microscopic composition of steel tailings was analyzed by ion chromatography,XRD,FTIR,and TG-DSC,and the effects of different pretreatment method on the compressive strength,flexural strength,and volume stability of steel tailings pavement bricks pavement were studied.The results reveal that the pH of the desulphurization waste liquid increased significantly from 5.70 to 7.36 after soaking the steel tailings.Additionally,the content of f-CaO in the steel tailings underwent a notable 25.3%reduction after treatment with the waste liquid,significantly inhibiting volume expansion and enhancing the volume stability.Furthermore,the boiling stability and mechanical properties of the developed steel tail slag-based pavement bricks meet the set design standards.

关 键 词：钢尾渣 F-CAO 脱硫废液 路面砖 力学性能 

分 类 号：TU522.1[建筑科学—建筑技术科学]