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High-activity calcium hydroxide with high specific surface area and preparation method thereof
According to the calcium hydroxide with the high specific surface area and the high activity and the preparation method of the calcium hydroxide, a nonionic surfactant is added in the lime slaking process, so that the surface energy of the calcium hydroxide is reduced, agglomeration is avoided, the dispersity of the calcium hydroxide is improved, the granularity of the calcium hydroxide formed in the slaking process is reduced, the specific surface area is increased, and the pore diameter is increased; the grain size is reduced, so that the calcium hydroxide has the characteristics of high specific surface and high activity; in the slaking process, a small amount of water is added, calcium hydroxide obtained by slaking lime is still dry powder, the water-cement ratio is low, a complicated drying process is not needed, and the volume fraction of the additive is reduced along with the reduction of the water, so that the addition cost of the additive is controlled, and the preparation process of industrial calcium hydroxide is simplified; lime slaking is facilitated by increasing the slaking water temperature, and a large amount of heat is provided for quick lime slaking due to insufficient steam generated in the reaction when the water temperature is too low. And the operation process is simple, and large-scale production and application are easy to realize.
本发明提供一种高比表高活性氢氧化钙及其制备方法，在石灰消化过程中加入非离子型表面活性剂，以降低氢氧化钙的表面能，避免团聚，提高氢氧化钙的分散度，使消化过程中形成的氢氧化钙粒度减小，比表面积增大，孔径变大，晶粒尺寸减小，从而使得氢氧化钙具有高比表和高活性的特点；在消化过程中加入的水量少，石灰消化得到的氢氧化钙仍为干粉，水灰比低，无需复杂的干燥流程，且添加剂的体积分数随水量的减少而降低，从而控制了添加剂的添加成本，简化工业氢氧化钙的制备流程；消化水温的提高有助于石灰消化，水温过低使反应中产生的蒸汽不足为生石灰消化提供大量热量；且操作流程简单，易于实现规模化生产应用。
High-activity calcium hydroxide with high specific surface area and preparation method thereof
According to the calcium hydroxide with the high specific surface area and the high activity and the preparation method of the calcium hydroxide, a nonionic surfactant is added in the lime slaking process, so that the surface energy of the calcium hydroxide is reduced, agglomeration is avoided, the dispersity of the calcium hydroxide is improved, the granularity of the calcium hydroxide formed in the slaking process is reduced, the specific surface area is increased, and the pore diameter is increased; the grain size is reduced, so that the calcium hydroxide has the characteristics of high specific surface and high activity; in the slaking process, a small amount of water is added, calcium hydroxide obtained by slaking lime is still dry powder, the water-cement ratio is low, a complicated drying process is not needed, and the volume fraction of the additive is reduced along with the reduction of the water, so that the addition cost of the additive is controlled, and the preparation process of industrial calcium hydroxide is simplified; lime slaking is facilitated by increasing the slaking water temperature, and a large amount of heat is provided for quick lime slaking due to insufficient steam generated in the reaction when the water temperature is too low. And the operation process is simple, and large-scale production and application are easy to realize.
本发明提供一种高比表高活性氢氧化钙及其制备方法，在石灰消化过程中加入非离子型表面活性剂，以降低氢氧化钙的表面能，避免团聚，提高氢氧化钙的分散度，使消化过程中形成的氢氧化钙粒度减小，比表面积增大，孔径变大，晶粒尺寸减小，从而使得氢氧化钙具有高比表和高活性的特点；在消化过程中加入的水量少，石灰消化得到的氢氧化钙仍为干粉，水灰比低，无需复杂的干燥流程，且添加剂的体积分数随水量的减少而降低，从而控制了添加剂的添加成本，简化工业氢氧化钙的制备流程；消化水温的提高有助于石灰消化，水温过低使反应中产生的蒸汽不足为生石灰消化提供大量热量；且操作流程简单，易于实现规模化生产应用。
High-activity calcium hydroxide with high specific surface area and preparation method thereof
一种高比表高活性氢氧化钙及其制备方法
YAN DONGJIE (author) / ZHAO JIAXUAN (author) / LI ZAOYUAN (author) / ZHANG KAILE (author)
2022-11-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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