PENGARUH UKURAN BUTIRAN TERHADAP STRUKTUR KRISTAL PADA PROSES KALSINASI PARSIAL DOLOMIT [Effect of Particles Size to Crystal Structure in Partial Calcination Process of Dolomite]

Abstract

One of the processes that determine the magnesium carbonat production is calcination process in dolomit mineral. From that process can be known that MgO, CaO, CaCO3 and MgCO3 happened. On calcination process expected that MgO can be formed in large quantities and CaO in small quantities. On the next step expected that MgO which was formed as Mg(HCO3)2 soluble in water and calcium which was formed as CaCO3 not dissolved in water. This research has been done a calcination process on dolomite mineral from Gresik and used three variables such as particles size, temperature and time of this process. From the result of this research were known that the dolomite from Gresik has a partial calcination point around 600 °C until 700 °C, total calcination around 800 °C until 900 °C. The result also shows that the particles size effected the time of calcination, when its size reached 2.5 cm the calcination time was the fastest. But the optimal result was not found yet so that the particles size above 2.5 cm and the scale of the research above 100 g need to be done.