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산화칼슘의 저온수화에 의한 고농도의 수산화칼슘 현탁액으로부터 입방형 탄산칼슘 입자의 제조

Preparation of Cubic-type Calcium Carbonate Particles from High Concentration Calcium Hydroxide Suspension by Controlling Hydration Temperature of Calcium Oxide

강윤찬 박승빈

Kang YC Park SB

HWAHAK KONGHAK, December 1997, 35(6), 846-849(4), NONE

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Abstract

탄산가스화법에 의한 탄산칼슘 입자 제조 공정에 있어서, 산화칼슘의 수화공정에서 수화온도를 낮추어주어 고농도의 수산화칼슘 현탁액으로부터 입방형 탄산칼슘 입자를 제조하였다. 산화칼슘의 수화온도를 조절하지 않은 경우에는 수산화칼슘 기준으로 물 1리터당 50g 이상의 농도에서 방추형의 입자들이 제조되었으나, 저온수화공정을 도입한 경우에는 물 1리터당 150g의 고농도에서 입방형 입자들이 제조되었다. 수화온도를 30℃ 이하로 유지시킨 경우에 저온수화 효과가 나타나 고농도에서도 입방형 탄산칼슘 입자들이 제조되었다. 저온수화공정을 도입한 경우에 현탁액의 농도가 증가함에 따라 입방형 입자의 크기가 증가하였다.

Cubic-type calcium carbonate particles from high concentration suspensions of calcium hydroxide by introducing low temperature hydration process of calcium oxide. Spindle-type calcium carbonate particles were obtained at higher concentrations than 50g/l from the calcium hydroxide suspension obtained at high temperature hydration. From the calcium hydroxide suspension obtained at low hydration temperature, however, cubic-type calcium carbonate particles were prepared even at high concentration of 150g/l of calcium hydroxide. The maximum temperature for the formation of cubic-type calcium carbonate particles from high suspension concentrations was 30℃. The mean size of cubic-type calcium carbonate particles increased with increasing the suspension concentration when the hydration temperature was low.

Keywords

Calcium Carbonate Carbonation Process Cubic-type Morphology Control

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