Study on modification of refractory cements

High alumina cement ac Pure Calcium aluminate Cement were modified by hydrstion - fir lug - grinding method. The pertiiclc she,spefic surface area and settiDg time of the modified cements were measured. The results show that themodified cen ments have much smaller article sizes and higher specific surface areas;there are no large particles in the modified cements;aam the modified fied cements have Ploper setting times fot installation. Compared with the castables bonded by the as-received ce cements,the Castables bonded by the modified acments have much higher strengths.