钢渣免烧砖碳化影响因素研究

针对钢渣制品在使用过程中存在安定性不良的问题,本文通过钢渣免烧砖碳化试验,从钢渣粒度、碳化时间、CO2气体压力、物料水分和成型压力5个方面探讨了钢渣免烧砖中钢渣碳化的影响因素。在试验范围内,这5个因素对碳化增重量和试块强度均产生明显影响,但影响趋势不尽相同。X射线衍射、扫描电镜和能谱成分分析表明,钢渣碳化后形成了大量细棒状的Ca CO3晶体。碳化后试块压蒸安定性合格,抗压强度≥15 MPa。对钢渣进行碳化制作免烧砖,能充分利用钢渣,吸收温室气体CO2,节约能源和养护时间,是钢渣利用的有效途径。

Influential factors of steel slag carbonization in baking-free bricks

We address the influential factors of steel slag carbonization in braking free bricks from granularity of steel slag, time of carbonization, gas pressure of carbon dioxide, moisture of material, and pressure of pressing bricks by steel slag braking free bricks carbonization experiment for solving the problem of unstable quality of steel slag products.These five factors all have significant impacts on carbonization weight increase and intensity of test bricks in the experimental scope, but the influential tendencies are quite different. XRD, SEM and EDS show that tremendous fine stick like calcium carbonate crystals generate after steel slag carbonization. The autoclave soundness is eligible after carbonization,greater than 15 MPa of compressive strength. Braking free brick manufacture by carbonization of steel slagcan absorb greenhouse gas CO2 by full utilization of steel slag, so energy source and cure time are saved. It is therefore an effective path for steel slag utilization.