Abstract
Investigations of the properties of water layers on bare barite and on barite samples covered with various amounts of TDACl after flotation are described. A thermal analysis method was used in our investigations. The relations between layer thickness, activation energy, enthalpy and entropy of bonded water and the amount of TDACl previously deposited on the barite surface were determined. On the basis of the results obtained and on the literature data an interpretation of these parameter changes caused by the barite surface coverage with TDACl molecules is proposed. Correlation between these parameters and the changes of water structure and barite flotability is also presented.
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