THERMODYNAMIC STUDY OF CHROMITE CAUSTIC FUSION PROCESS

摘要

A new method for chromate cleaning production named chromite caustic fusion process, is advanced by Institute of Chemical Metallurgy, the Chinese Academy of Sciences. With sodium hydroxide as reaction medium, the new process is composed of three procedures: liquid phase oxidation of chromite - metastable phase separation - carbonation ammonium transition. Generally illustrating the new process and its features, this paper mainly studies the thermodynamics of chromite oxidation. The new process has much better practical results than the conventional chromate production process in which sodium carbonate is used as reaction medium. The superiority is also shown through thermodynamic studies.