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Preparation method of high-purity low-calcium calcium silicate
The invention discloses a preparation method of high-purity low-calcium calcium silicate, which comprises the following steps: adding water into calcium hydroxide and silicon dioxide, and uniformly mixing to obtain a mixture; drying the mixture, then adding ethanol, uniformly mixing, carrying out compression molding to prepare a first green body, then carrying out first calcination treatment on the first green body, and cooling to obtain an intermediate product; removing the vitreous body from the intermediate product, crushing, grinding into powder, adding ethanol into the powder, uniformly mixing, carrying out compression molding to prepare a second green body, carrying out second calcining treatment on the second green body, and cooling to obtain the high-purity low-calcium calcium silicate. According to the method, the existing calcium silicate sintering process is improved, and the method is highly compatible with the existing preparation process and high in repeatability. The purity of the prepared low-calcium calcium silicate is obviously improved, interference on carbonization of the low-calcium calcium silicate in the carbonization process is obviously reduced, and a basis is provided for research on the carbonization performance of C3S2 and alpha-CS.
本发明公开一种高纯度低钙硅酸钙的制备方法，包括以下步骤：将氢氧化钙和二氧化硅加水混合均匀，得到混合料；将混合料烘干，随后加入乙醇混合均匀，再经压制成型制成第一坯体，然后将第一坯体进行第一煅烧处理，冷却后得到中间产物；将中间产物除去玻璃体后破碎、粉磨成粉料，随后向粉料中加入乙醇混合均匀，再经压制成型制成第二坯体，然后将第二坯体进行第二煅烧处理，冷却后得到高纯度低钙硅酸钙。本发明对现有的硅酸钙烧成工艺进行了改进，与现有制备工艺高度兼容，可重复性高。本发明制备的低钙硅酸钙纯度明显提升、在碳化过程中对低钙硅酸钙碳化的干扰明显降低，为C3S2和α‑CS的碳化性能研究提供了基础。
Preparation method of high-purity low-calcium calcium silicate
The invention discloses a preparation method of high-purity low-calcium calcium silicate, which comprises the following steps: adding water into calcium hydroxide and silicon dioxide, and uniformly mixing to obtain a mixture; drying the mixture, then adding ethanol, uniformly mixing, carrying out compression molding to prepare a first green body, then carrying out first calcination treatment on the first green body, and cooling to obtain an intermediate product; removing the vitreous body from the intermediate product, crushing, grinding into powder, adding ethanol into the powder, uniformly mixing, carrying out compression molding to prepare a second green body, carrying out second calcining treatment on the second green body, and cooling to obtain the high-purity low-calcium calcium silicate. According to the method, the existing calcium silicate sintering process is improved, and the method is highly compatible with the existing preparation process and high in repeatability. The purity of the prepared low-calcium calcium silicate is obviously improved, interference on carbonization of the low-calcium calcium silicate in the carbonization process is obviously reduced, and a basis is provided for research on the carbonization performance of C3S2 and alpha-CS.
本发明公开一种高纯度低钙硅酸钙的制备方法，包括以下步骤：将氢氧化钙和二氧化硅加水混合均匀，得到混合料；将混合料烘干，随后加入乙醇混合均匀，再经压制成型制成第一坯体，然后将第一坯体进行第一煅烧处理，冷却后得到中间产物；将中间产物除去玻璃体后破碎、粉磨成粉料，随后向粉料中加入乙醇混合均匀，再经压制成型制成第二坯体，然后将第二坯体进行第二煅烧处理，冷却后得到高纯度低钙硅酸钙。本发明对现有的硅酸钙烧成工艺进行了改进，与现有制备工艺高度兼容，可重复性高。本发明制备的低钙硅酸钙纯度明显提升、在碳化过程中对低钙硅酸钙碳化的干扰明显降低，为C3S2和α‑CS的碳化性能研究提供了基础。
Preparation method of high-purity low-calcium calcium silicate
一种高纯度低钙硅酸钙的制备方法
WANG FAZHOU (author) / LIU ZHICHAO (author) / ZHANG ZHIPENG (author) / HU SHUGUANG (author)
2024-03-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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