铁尾砂基胶结剂制备及其性能研究  

Study on preparation and properties of iron tailings-based binder

作　　者：王磊 张泉 罗鼎 陈晓青 WANG Lei;ZHANG Quan;LUO Ding;CHEN Xiaoqing(School of Mining Engineering,University of Science and Technology Liaoning,Anshan Liaoning 114051,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051

出　　处：《有色金属（矿山部分）》2023年第3期14-19,共6页NONFERROUS METALS(Mining Section）

基　　金：国家自然科学基金资助项目(51174110)。

摘　　要：针对充填采矿法存在充填体强度较低、充填成本过高的问题,采用鞍钢某选矿厂铁尾砂作为原料,开展了新型铁尾砂基充填胶凝材料的研究。通过测定不同养护龄期、灰砂比和料浆浓度条件下的充填体抗压强度和料浆的流动性,对比分析P·S 32.5水泥和新型胶凝材料的充填体力学强度和流动性。结果表明:在相同条件下新型胶凝材料充填体强度略高于水泥,且在灰砂比和料浆浓度一定的条件下,铁尾砂基胶结剂料浆流动性高于水泥。同时利用SEM从微观层面对两种胶凝材料进行了对比分析,结果显示新型胶凝材料密实度更高。得出结论:采用鞍钢选矿尾砂制备的新型胶凝材料,其力学强度和流动性均满足矿山充填要求,可以替代水泥用于矿山充填,降低矿山充填成本。Aiming at the problems of low strength of the filling body and high filling cost in the filling mining method,a new type of iron tailings-based filling cementitious material was studied by using iron tailings from a concentrator of Angang as raw materials.By measuring the compressive strength and fluidity of the filling body under different curing ages,cement-sand ratios,and slurry concentrations,the mechanical strength and fluidity of the filling body of P·S 32.5 cement and new cementitious materials were compared and analyzed.The results show that under the same conditions,the strength of the new cementitious material filling body is slightly higher than that of cement,and under the condition of certain cement-sand ratio and slurry concentration,the fluidity of iron tailings-based binder slurry is higher than that of cement.At the same time,SEM was used to compare and analyze the two cementitious materials from the micro level.The results show that the new cementitious material has higher compactness.It is concluded that the mechanical strength and fluidity of the new cementitious material prepared by Angang tailings meet the requirements of mine filling,which can replace cement for mine filling and reduce the cost of mine filling.

关 键 词：胶凝材料 铁尾砂 充填体强度 灰砂比 料浆浓度 

分 类 号：TD981[矿业工程—选矿]