| 摘要 |
<p>PROBLEM TO BE SOLVED: To produce a slaked lime composition small in reduction of a specific surface area with the lapse of time and excellent in storage stability by adding a specified amount of an alkali metal hydroxide to the slaked lime. SOLUTION: In this slaked time composition, 0.1-0.7 pts.wt. of an alkali metal hydroxide is incorporated in 100 pts.wt. slaked lime. NaOH and/or KOH is preferable as the alkali metal hydroxide. In the production of the slaked lime composition, a prescribed amount of NaOH and/or KOH are added preferably. For example, NaOH and/or KOH may be added at a grinding stage or may be dissolved previously in water for hydrating calcium oxide. The method is effective for preventing deterioration with the lapse of time of a pulverized slaked lime large in absorption of moisture and CO2 and having >=30m<2> /g specific surface area, and especially effective in the case when the slaked lime composition is stored for 1-2 week in an atmosphere of 30-70% relative humidity.</p> |
