1.Hebei Academy of Building Research,Shijiazhuang 050021,China;2.Zhuhai OMEC Instruments Coporation Ltd., Zhuhai 519085, China;3.Hebei Construction Engineering Technology Coporation Ltd., Shijiazhuang 050021, China
Two kinds of light calcium carbonate(LCC) sample were selected, in which slurry AD755 dispersion modifier was added and was not added after carborization production, and their sizes were tested, the effects of AD755 dispersion modifier on the final size of calcium carbonate were studied, the particle changes of the modified superfine LCC which storage lives were more than 1 year were compared, the particle differences of the different LCC prepared using different types of dispersing reagents(e.g. OM7, sodium hexametaphosphate and a flow modifier) were understood. The results show that AD755 can reduce the dissolution of calcium carbonate in the calcium carbonate granules test, and play a role in dispersion stability; after the excellent modified superfine LCC was stored for a certain period of time, its particle change is very subtle; during the specific application of LCC using different dispersing reagent, its true paricle is different.