超细碳酸钙的碳化机理探讨

Study on mechanism of carbonation of super-fine calcium carbonate

间歇鼓泡碳化法生产超细碳酸钙的碳化过程是一个四相浆态反应过程。本文在双膜理论基础上 ,提出用“四膜模型”的观点来探讨碳化各阶段的动力学区域和碳化机理 ;探讨了包裹返碱现象发生的规律和碳化过程的化学理论基础。

Carbonation process of inter va l bubbling carbonation method to produce super-fine calcium carbonate is a four phases slurry reaction process.On the base of The Double-film Theory, the thes is has expounded so called Four-film Model(gas-film,liquid-film A,liquid-fil m B and solid-film),and has researched the mechanism of carbonation of diverse terms and dynamic range.The chemistry theoretical foundation of carbonation proc ess from the view that the diverse carbonation has a different controlling-step and the rule of “parcel-returning base phenomenon” to take place in the late -term of carbonation are discussed.