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选用长广煤为试验煤种,分析纯CaO、MgO为添加剂,在两段多相反应实验台开展联产Q相水泥熟料试验.同时,对熟料样品矿物组成进行XRD、SEM和EDS分析,并对联产获得的Q相水泥熟料样品开展水化强度、膨胀性、安定性、凝结时间和水化性能等测试.结果表明,熟料样品矿物组成主要为2CaO.SiO2、Q相和3CaO.3Al2O.3CaSO4等;Q相水泥熟料样品砂浆试样各龄期抗压强度和抗折强度接近于32.5强度等级普通硅酸盐水泥标准,当Q相水泥熟料中掺加30%的硅酸盐水泥熟料时,其砂浆试样各龄期抗压强度和抗折强度达到32.5强度等级普通硅酸盐水泥标准要求;Q相水泥熟料样品膨胀性、安定性和凝结时间符合国家水泥相关标准;除2CaO.SiO2外,联产Q相水泥熟料水化3d就出现2CaO.Al2O.38H2O、3CaO.Al2O.33CaSO4.32H2O、xCaO.SiO2.yH2O和Al2O.33H2O水化产物,且随着水化龄期的延长,2CaO.Al2O3.8H2O、3CaO.Al2O.3CaSO.412H2O、3CaO.Al2O.36H2O等水化产物逐渐增多,显示出良好的水化性能.
In this paper, Chang-Guang coal was selected as test coal and pure CaO and MgO were analyzed as additive to conduct co-production Q-phase cement clinker test on two stages of multi-phase reaction bench, and the mineral composition of clinker samples was analyzed by XRD, SEM and EDS , And the hydration intensity, expansibility, stability, setting time and hydration performance of Q phase cement clinker samples obtained from cogeneration were tested.The results show that the main mineral components of clinker samples are 2CaO.SiO2, Q phase and 3CaO.3Al2O.3CaSO4, etc .; Q phase cement clinker sample mortar samples at various ages compressive strength and flexural strength close to 32.5 strength grade ordinary Portland cement standards, Q phase cement clinker mixed with 30% Portland cement clinker, the mortar samples at each age compressive strength and flexural strength of 32.5 strength grade ordinary Portland cement standards; Q phase cement clinker samples swelling, stability and setting time in line with the state Cement-related standards; 2CaO.Al2O.38H2O, 3CaO.Al2O.33CaSO4.32H2O, xCaO.SiO2.yH2O and Al2O.33H2O hydration products appear in addition to 2CaO.SiO2, and With the extension of hydration age, 2CaO.Al2O3.8H2O, 3CaO.Al2O.3CaSO.412H2O, 3CaO.Al2O .36H2O and other hydration products gradually increased, showing good hydration properties.