1965年上海市建筑科学研究所等单位研制了化铁炉渣无熟料水泥,但是它存在着凝结硬化极为缓慢、早期强度很低等缺点,在使用上受到很大限制。近年来,他们试烧成功了一种超早强熟料,并将其熟料和化铁炉渣、石膏共同粉磨,试制成功了早强化铁炉渣水泥。二十八天强度可以达到300～500号,而一天抗压强度可以稳定在100公斤/厘米~2左右,且安定性良好。超早强熟料是以石灰石、矾土、化铁炉渣为原料,经1250～1300烧成,熟料 In 1965, the Shanghai Institute of Building Science and other units developed a chemical clinker without clinker, but it has the disadvantages of very slow set hardening, low early strength, and is very limited in use. In recent years, they successfully burned an ultra-early-strength clinker by trial firing, and grinded the clinker together with the smelting slag and gypsum, and successfully produced iron slag cement in early strength. The 28-day intensity can reach 300-500, and the compressive strength can be stabilized at 100 kg/cm-2 during one day, and the stability is good. The ultra-early strong clinker is made of limestone, bauxite, and iron slag as raw materials, fired from 1250 to 1300, and clinker