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Factors influencing the reaction between phlogopite and CaSo 4 ·2H 2 O plus CaO mixtures
Author(s) -
Aitta Eero,
Jyrkäs Kauko
Publication year - 1986
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280360405
Subject(s) - phlogopite , muscovite , magnesium , chemistry , potassium , calcium , mineralogy , reactivity (psychology) , inorganic chemistry , materials science , metallurgy , geology , medicine , paleontology , quartz , alternative medicine , pathology , mantle (geology)
According to earlier studies phlogopite reacts with CaSO 4 .2H 2 O and a mixture of CaSO 4 .2H 2 O and CaO exchanging 40–80% of its potassium with calcium. The same reactions occur only poorly in the case of muscovite. The structural difference between phlogopite and muscovite is small so that some unknown factors must effect the exchange reaction. In the present work the factors influencing the reaction between phlogopite and a CaSO 4 .2H 2 O/CaO mixture have been studied by means of X‐ray diffraction and an electron microscope. A rod mill has been employed in the separation of the solid phases produced during the reaction. The results have been calculated and drawn by computer programs created for the study. The effects of gypsum, calcium oxide, iron, aluminium and magnesium have been treated in the exchange reaction. Also the poor reactivity of muscovite in the reaction conditions used has been discussed.