| 摘要 |
<p>A particulate or finely processed product containing a lime component is made into a high-quality product having a low unreacted calcareous substance content and a high specific surface area. A processed product containing a lime component and having a size not in excess of 5 mm comprises one or more calcareous feedstocks among limestone, slaked lime, and by-product lime; and an auxiliary feedstock admixed according to need, the processed product being calcined at 400 to 1200°C using a heat-treatment device comprising a furnace tube for heating the processed product, and beater members provided within the furnace tube. The beater members are provided in a plurality of columns along the direction of the center axis of the furnace tube, the rotation of the furnace tube causing the beater members to roll over the inside surface of the furnace tube, and impart shock to the processed product. The processed product comprises 60 to 99 wt% of CaO, 0.1 to 5 wt% of a carbonate (expressed in terms of CO2), 0.01 to 20 wt% of Al2O3, and 0.01 to 20 wt% of SiO2, while having a hydration activity of 0.5 to 60 seconds, and a BET specific surface area of 3 m2/g or higher.</p> |
