Hydration of Mechanically Activated Low-Calcium Ash from Thermal Power Stations
A. M. KALINKIN, B. I. GUREVICH, E. V. KALINKINA, O. A. ZALKIND
Pananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Centre, RAS, Apatity, Russia
Keywords: зола гидроудаления ТЭС, механоактивация, вяжущие свойства, hydroremoval ash from TPS, mechanical activation, binding properties
Pages: 387-393
Abstract
The effect of mechanical activation of low-calcium ash of hydroremoval from the Apatity TPS without alkaline and other chemical reagents on its binding characteristics was studied. Mechanical activation was carried out in a centrifugal planetary mill AGO-2 for up to 400 s. Initial and mechanically activated ash was studied by means of X-ray phase analysis, IR spectroscopy, scanning electron microscopy, laser granulometry. Specific surface was determined. The data on aqueous leaching of initial and mechanically activated ash, as well as the data obtained by means of IR spectroscopy and thermogravimetric analysis, show that mechanical activation causes a noticeable increase in ash reactivity with respect to water. During normal solidification, the compression strength of ash-based samples after MA for 60-400 s at the age of 7 and 28 days was 0.7-1.7 and 1.4-2.2 MPa, respectively.
DOI: 10.15372/CSD20180406
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