Study On Preparation For High Intake Of C₃S Cement Clinker With Industrial Waste Residue

Cement, widely used as constructional materials, has extensive market demand. But now the production of cement in our country is mainly based on natural materials, and the production level is comparatively low. So there is an increasing call to study and produce high gelatinous property cement clinker. Because of these, the research and development of portland cement producing technics with high efficiency and low energy consumption has profound theoretical and practical significance.This thesis emphasizes on the study of using industrial waste residue to improve the burnability of raw materials. With XRD, ICP, SEM, and ESCA, the preparation and formation mechanism of high intake of C₃S in clinker under lower temperature(1450℃) was analyzed specificly. The industrial buring system are also discussed by simulating the industrialization production in lab.This paper started with the formation of high intake of C₃S clinker under lower temperature(1450℃). Results from experiments indicated that: when 7% of raw materials are substituted by phosphorous slag, KH is 0.98, SM is 2.2 and IM is 1.6, the high intake of C₃S clinker can be produced eligibly under 1450℃. And the crystallization of C₃S, with numbers of grains, is perfect, and distributed symmetrically. Other phases in clinker are excellent as well. The early-age compressive strength is over 30Mpa and above 70Mpa in the later-age.The operation mechanism of phosphorous slag was also studied in course of forming high intake of C₃S clinker. The result shows that numbers of minute crystal in phosphorous slag play an role of crystal seed, which can reduce the active energy of exterior reaction of C₃S and accelerate the form of C₃S at a lower supersaturation. The vitreous body in phosphorous slag can not only reduce the temperature that the liquid phase need, but also increase the quantity of liquid phase.