利用钢渣生产节能快硬高强型水泥的研究

Produce energy-saving fast hardening and high strength cement with steel slag

合理利用工业废弃渣生产节能型快硬高强水泥是水泥工业发展的方向之一。在实验室中,掺加复合矿化剂或运用晶种技术,利用石灰石、粘土、石膏及少量萤石,外掺部分钢渣烧制快硬高强型水泥,用正交试验找到了最佳的原料配比。煅烧温度控制在1300℃±50℃,所得熟料中含有大量早强矿物C3S和一定数量的无水硫铝酸钙(C4A3S)和少量C11A7·CaF2;同时还有部分高温煅烧石膏,这使水泥粉磨时无需再外掺石膏。所制得的节能型快硬高强水泥,其后期强度也比较稳定,与普硅水泥相比,煤耗降低约20%,熟料产量增加10%左右。不需增加任何设备投资和工艺改进,改进的生料配方适合各种窑型煅烧。

It is the developing direction of cement industry that utilize industrial waste reasonably to produce energy-saving fast hardening and high strength cement. In laboratory,firing fast hardening and high strength cement by adding compound mineralizer or crystal seed in raw material -- including limestone,elay,gypsum,a few fluorite and some steel slag,the best matching ratio of raw material was found by using cross experiment.Burned at 1 300 ℃±50℃,the clinker has a lot of high early strength mineral C2S,a certain of mineral C4A3S, a few of mineral C11A7·CaF2 as well as a few of burned gypsum with which grinding cement without adding gypsum. This energy-saving fast hardening and high strength cement has stable final strength,compared with ordinary Portland cement,about 20% coal could be saved and clinker output could increase 10% or so.Without any investing on equipment and process ameliorating,the improved raw material recipe adapted to verious kiln to burn.