Effects of Water-Lime Ratio and Stirring Speed of Lime Dry Hydration on Hydration Productions Properties

In this paper, the effects of two main factors on dry hydration productions properties of water-lime ratio and stirring speed were studied by using a pint-sized dry hydration equipment. The effect of water-lime ratio and stirring speed on hydration rate were analyzed. Characteristic of temperature rise during hydration procedure was put forward, and the surface structure characteristics and size distribution under different hydration conditions were obtained by using SEM and particle size analyzer. The results show that with the increase of water-lime ratio, the lime hydration rate increased, but the temperature of the lime slaker decreased, which result in the particle diameter distribution moving towards the large range of particle, and the mean diameter increasing gradually. SEM images appear the presence of agglomeration at higher water-lime ratio. With the increase of stirring speed, the hydration rate decreased, but particle diameter distribution moved towards the small rang of particle.