Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing high-quality nano calcium carbonate from limestone ore
The invention discloses a method for preparing high-quality nano calcium carbonate from limestone ore, which comprises the following steps: calcining limestone into high-activity calcium oxide, hydrating high-activity lime with the content of more than 80% to prepare a high-activity calcium hydroxide emulsion, introducing CO2 gas into the high-activity calcium hydroxide emulsion, and stirring to obtain high-quality nano calcium carbonate. The high-quality nano calcium carbonate can be prepared by directly carrying out carbonization absorption and carrying out impurity removal, filtration and drying, the whiteness can reach 95% or above, and the purity can reach 98% or above. On the basis of preparing high-activity lime by calcining limestone, the high-activity calcium hydroxide emulsion is prepared by digestion, and then the high-activity calcium hydroxide emulsion is used for directly capturing CO2 by a one-step method to prepare the high-quality nano calcium carbonate. The method is short in technological process, low in cost, high in efficiency, free of additive introduction in the process, recyclable in aqueous solution, free of waste discharge, green and environment-friendly.
本发明公开了一种利用石灰石矿制备高品质纳米碳酸钙的方法，首先将石灰石煅烧成高活性氧化钙，然后将含量达到80％以上的高活性石灰，经水化处理后制备成高活性氢氧化钙乳液，再将CO2气体通入到高活性氢氧化钙乳液中，直接可进行碳化吸收，经除杂、过滤、干燥即可制得高品质纳米碳酸钙，白度可达95％以上，纯度可达98％以上。本发明在煅烧石灰石制备高活性石灰的基础上，消化制备高活性氢氧化钙乳液，然后使用高活性氢氧化钙乳液一步法直接进行捕集CO2制备高品质纳米碳酸钙。工艺流程短，成本低，效率高，而且过程中不引入添加剂，水溶液可以循环使用，无废排放，绿色环保。
Method for preparing high-quality nano calcium carbonate from limestone ore
The invention discloses a method for preparing high-quality nano calcium carbonate from limestone ore, which comprises the following steps: calcining limestone into high-activity calcium oxide, hydrating high-activity lime with the content of more than 80% to prepare a high-activity calcium hydroxide emulsion, introducing CO2 gas into the high-activity calcium hydroxide emulsion, and stirring to obtain high-quality nano calcium carbonate. The high-quality nano calcium carbonate can be prepared by directly carrying out carbonization absorption and carrying out impurity removal, filtration and drying, the whiteness can reach 95% or above, and the purity can reach 98% or above. On the basis of preparing high-activity lime by calcining limestone, the high-activity calcium hydroxide emulsion is prepared by digestion, and then the high-activity calcium hydroxide emulsion is used for directly capturing CO2 by a one-step method to prepare the high-quality nano calcium carbonate. The method is short in technological process, low in cost, high in efficiency, free of additive introduction in the process, recyclable in aqueous solution, free of waste discharge, green and environment-friendly.
本发明公开了一种利用石灰石矿制备高品质纳米碳酸钙的方法，首先将石灰石煅烧成高活性氧化钙，然后将含量达到80％以上的高活性石灰，经水化处理后制备成高活性氢氧化钙乳液，再将CO2气体通入到高活性氢氧化钙乳液中，直接可进行碳化吸收，经除杂、过滤、干燥即可制得高品质纳米碳酸钙，白度可达95％以上，纯度可达98％以上。本发明在煅烧石灰石制备高活性石灰的基础上，消化制备高活性氢氧化钙乳液，然后使用高活性氢氧化钙乳液一步法直接进行捕集CO2制备高品质纳米碳酸钙。工艺流程短，成本低，效率高，而且过程中不引入添加剂，水溶液可以循环使用，无废排放，绿色环保。
Method for preparing high-quality nano calcium carbonate from limestone ore
一种利用石灰石矿制备高品质纳米碳酸钙的方法
JIA ZHONGSHUAI (Autor:in) / SHI PEIYANG (Autor:in) / LUO GUOLI (Autor:in) / YANG ZHAO (Autor:in) / ZHANG BIN (Autor:in) / BAI QIANHUI (Autor:in) / XU HAIYU (Autor:in) / WANG JIPING (Autor:in) / LI BINRAN (Autor:in) / WANG ZHICHENG (Autor:in)
23.05.2023
Patent
Elektronische Ressource
Chinesisch
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