改性钢渣制备水泥的基础性能研究

摘要:以钢渣、铁尾矿为主要原料，将钢渣掺加三种铁尾矿并在高温下熔融，熔融后得到的改性钢渣用于制备钢渣水泥。研究钢渣掺加三种铁尾矿制备的钢渣水泥的凝结时间、安定性、抗折抗压强度等性能。通过物理性能和XRD检测分析三种改性钢渣水泥的各项基础性能。结果表明，此改性钢渣水泥具有良好的物理力学性能。钢渣掺加铁尾矿改性之后能缩短钢渣水泥的初凝时间，有效提高钢渣水泥的早期强度；改性钢渣水泥中f-CaO含量低于2%，钢渣掺加铁尾矿能有效降低f-CaO含量，提高水泥的安定性；抗折抗压强度分别达到P?SS42.5和P?SS32.5R等级。本项目利用当地工业废渣和尾矿研制的改性钢渣复合硅酸盐水泥，铁尾矿掺量达到了10%，对废弃资源进行了有效利用，增加了钢渣的高附加值，减少了环境污染。 

Study on the Basic Properties of the modified steel slag cement

The steel slag and iron tailings were chosen as main materials.The slag mixed with three kinds of iron tailings was melted at high temperature to produce the modified steel slag,which was used to make slag cement.Such properties as setting time,stability and flexural and compressive strength of the modified steel slag cement were studied.Through the physical properties analysis and XRD detection,the basic properties of the modified steel slag cement were studied.The results showed that the modified steel slag cement had good physical and mechanical properties.The stability was good.The flexural and compressive strength can reach the standard of P·SS42.5 and P·SS32.5R cement.Using the local industrial residue and tailings,the project prepared the modified steel slag composite silicate cement and the content of iron tailing reached 10%,effectively using the waste resources,increasing steel slag with high added value,reducing the pollution of the environment.