Abstract:Two approaches, named pressure filtration (PF) and vaporization dewatering (VD), for qualitative and quantitative analysis of the water forms were presented. The principle of VD is that with the process of heating, the free water, surface water and capillary water are in turn vaporized at different rates, then the turning points of the rates are determined and the quantitative analysis can be made. Some experiments with suspension of water and CaCO3powder were given and discussed by applying the vaporization dewatering approach.

Key words: solid-liquid separation; existence forms of water; vaporization dewatering