Ceramics-Silikáty 49, (2) 120 - 125 (2005) |
|
INFLUENCE OF THE TECHNOLOGICAL PARAMETERS ON THE STRUCTURE AND PROPERTIES OF HEMI-HYDRATE PHOSPHOGYPSUM
|
Valancius Zeonas, Nizeviciene Dalia, Leskeviciene Violeta,
Kybartiene Nora
|
Department of Silicate Technology, Faculty of Chemical Technology, Kaunas University of Technology
Radvilenu str. 19, 50254 Kaunas, Lithuania
|
Keywords: Hemi-hydrate phosphogypsum, Apatite, Crystals, Physico-mechanical properties
|
Industrial way of the production of ortho-phosporic acid from apatite of various areas results in the waste product
CaSO₄ ·0.5H₂O having different structure and properties. To study the effect of the technological parameters on the formation
of hemi-hydrate phosphogypsum, laboratory experiments of the decomposition of Kola apatites with sulphuric acid have been
carried out and the properties of hemi-hydrate phosphogypsum investigated. The regulation the technological parameters of
decomposition makes possible to obtain hemi-hydrate calcium sulphate which is characterized by well pronounced crystal
structure and by good binding and physical-mechanical properties without additional processing. |
 PDF (0.2 MB) |
|
