スラリの圧搾分離に関する研究 : 圧搾分離機構の基礎的解析

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From theoretical considerations on the dehydration mechanism by expression operation, the process can be devided into constant pressure filtration period and consolidation period which follows the former.The constant pressure filtraiton process during expression can be easily analyzed by using a modified Ruth's equation derived in this paper. For the consolidation process, the consolidation theory in the field of soil mechanics is adopted. For analyzing the experimental data of consolidation, the Terzaghi's theory is modified assuming a sine curve distribution of the hydraulic pressure within cake of moderate compressibility at the initial stage of consolidation.Several characteristics values of modified filtration coefficient K', time factors T_j and T_m, and filtration ratio U_j are defined in accordance with the definition of the coefficient of consolidation C_v, the time factor T_o, and the average consolidation ratio U_j in soil mechanics. Using these definition, both filtration and consolidation can be analyzed in the same manner.From the mathmatical analysis attempted in this paper, reasonable correlation between the theories and the experiments are obtained.
1965-04-25