镍渣替代铁粉制备道路硅酸盐水泥

以镍渣替代铁粉制备道路硅酸盐水泥熟料,研究了生料的易烧性,测定了熟料的f-CaO含量,采用X射线衍射,扫描电子显微镜等手段,对水泥熟料的矿物组成、强度、水化产物等进行了分析研究.结果表明:掺入适量镍渣煅烧的熟料f-CaO含量较低,生料的易烧性良好;熟料水化后水化程度好,有较高的抗折强度.当镍渣掺入量为10%,煅烧温度为1370 ℃时,28 d抗压强度可达75.2 MPa,抗折强度可达11.2 MPa.

Preparation of Road Portland Cement by Nickel Slag Instead of Iron Powder

Road portland cement clinker was prepared by nickel slag to replace iron powder.Burn ability of cement raw meal and f-CaO content were tested.By using X-ray diffraction, scanning electron microscope,mineral composition of clinker, strength, hydration product of hardened cement paste were studied.It turned out that the nickel slag that mixed to sinter clinker can reduce f-CaO content and improve burn-ability of raw material.Furthermore, the clinker has good hydrate degree, the bending strengths increase as well.When the proper addition of nickel slag in the raw materials is 10%,the sintering temperature is 1370 ℃, 28 d compressive strength can reach 75.2 MPa and the bending strength is up to 11.2 MPa.