The effects of limestone characteristic, granulation and calcination temperature to the reactivity of quicklime

Sengpasith Houngaloune, Kamar Shah Ariffin, Hashim Bin Hussin, Koichiro Watanabe, Visane Nhinxay

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Abstract

This paper presents a study on the effects of limestone characteristic, granulation and calcination temperature to the reactivity of the produced quicklime. Limestones with different granulations (<1.18 mm, 4.75-10 mm and 10-20 mm) have been calcined at four selected temperatures (950°C, 1050°C, 1150°C, 1250°C) for 2 hours and the produced quicklime were then slaked, respectively. The microstructural characteristics of the limestone (texture, grain size, etc.) were determined using polarizing transmitted light microscope. The produced quicklime was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD) and BET (N2 adsorption method). The temperature rises during the hydration of quicklime were recorded in order to study its reactivity. Test results pointed out that the hydrated lime which was prepared at 1050°C calcination temperature for all granulations had the highest reactivity due to their highest specific surface area, high porosity with uniform pore size distribution structure and minimum crystalline size characteristics.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalMalaysian Journal of Microscopy
Volume6
Issue number1
Publication statusPublished - 2010

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All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • Histology
  • Instrumentation

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