钢渣分相熟料研究与应用进展

Research and application progress in multi-phased clinker

受钢渣安定性不良、易磨性差、活性低的制约,钢渣在我国的综合利用率不足30%。针对钢渣在水泥领域中的应用瓶颈,提出了一种钢渣分相熟料烧成技术,将未经粉磨的原状钢渣直接投放到回转窑中,形成一种以热处理钢渣为内核、高铁熟料为过渡区、普通熟料为外壳的钢渣分相熟料。模拟实验表明:钢渣分相熟料技术烧制的熟料中C3S和C2S晶体发育更为完整,熟料易磨性与普通熟料相当且强度高。该技术提高了窑的台时产量,降低煤耗和CO2排放。钢渣分相熟料烧成技术可以大规模、高附加值地消纳钢渣,具有较高的经济效益和生态环保效益。

The comprehensive utilization rate of steel slag in China is less than 30%due to its poor soundness and grindability as well as low activity.Aiming at breaking the bottleneck of the application of steel slag in cement field,multi-phased clinker sintering technology is put forward that is directly putting unpulverized steel slag into the rotary kiln to form the multi-phased clinker which is composed of heat-treated steel slag core,high celite content clinker transition area and ordinary clinker shell.Simulation experiments show that the crystal development of C3S and C2S in clinker calcined by the multi-phased clinker sintering technology is more complete,the multi-phased clinker has high strength and grindability of the multi-phased clinker are nearly equal to those of ordinary clinker.The multi-phased sintering technology improves the output of kilns,reduces coal consumption and CO2 emissions,which can dispose steel slag in large scale and high value-added with high economic and environmental benefits.