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PRODUCTION METHOD OF AQUEOUS SUSPENSION OF CALCIUM HYDROXIDE
PROBLEM TO BE SOLVED: To provide a production method of lime milk having a similar viscosity or the like to a conventional one, even when the use amount of coke and the amount of middle pressure steam to be used for preparing warm water to be reacted with quicklime are reduced.SOLUTION: In a production method of an aqueous suspension of calcium hydroxide, limestone is thermally decomposed with combustion heat of coke in a limekiln to produce quicklime, which is reacted with warm water to produce an aqueous suspension of calcium hydroxide. The amount of the coke to be used for thermal decomposition of the limestone is reduced from a conventional use amount of 12.5 pts.wt. relative to 100 pts.wt. of the limestone by 3.0-8.0 wt.%, and the temperature of the warm water to be reacted with the quicklime is lowered to 50-70°C.
【課題】 コークス使用量及び生石灰と反応させる温水の調製に使用する中圧蒸気量を削減しても、粘度等が従来と変わらない石灰乳の製造方法を提供する。【解決手段】 石灰炉内で、石灰石をコークスの燃焼熱により熱分解して生石灰を製造し、その生石灰を温水と反応させて水酸化カルシウム水性懸濁液を製造する方法において、石灰石の熱分解に使用するコークス量を石灰石１００重量部に対しての従来の使用量１２．５重量部に対して３．０〜８．０重量％削減し、生石灰と反応させる温水の温度を５０〜７０℃に低減する。【選択図】 図１
PRODUCTION METHOD OF AQUEOUS SUSPENSION OF CALCIUM HYDROXIDE
PROBLEM TO BE SOLVED: To provide a production method of lime milk having a similar viscosity or the like to a conventional one, even when the use amount of coke and the amount of middle pressure steam to be used for preparing warm water to be reacted with quicklime are reduced.SOLUTION: In a production method of an aqueous suspension of calcium hydroxide, limestone is thermally decomposed with combustion heat of coke in a limekiln to produce quicklime, which is reacted with warm water to produce an aqueous suspension of calcium hydroxide. The amount of the coke to be used for thermal decomposition of the limestone is reduced from a conventional use amount of 12.5 pts.wt. relative to 100 pts.wt. of the limestone by 3.0-8.0 wt.%, and the temperature of the warm water to be reacted with the quicklime is lowered to 50-70°C.
【課題】 コークス使用量及び生石灰と反応させる温水の調製に使用する中圧蒸気量を削減しても、粘度等が従来と変わらない石灰乳の製造方法を提供する。【解決手段】 石灰炉内で、石灰石をコークスの燃焼熱により熱分解して生石灰を製造し、その生石灰を温水と反応させて水酸化カルシウム水性懸濁液を製造する方法において、石灰石の熱分解に使用するコークス量を石灰石１００重量部に対しての従来の使用量１２．５重量部に対して３．０〜８．０重量％削減し、生石灰と反応させる温水の温度を５０〜７０℃に低減する。【選択図】 図１
PRODUCTION METHOD OF AQUEOUS SUSPENSION OF CALCIUM HYDROXIDE
水酸化カルシウム水性懸濁液の製造方法
NAKAMURA TOSHIKAZU (author) / TAKEDA TAKAYUKI (author) / TSUMURA HIROSHI (author)
2015-08-03
Patent
Electronic Resource
Japanese
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