Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of functional micro-nano calcium carbonate
The invention discloses a preparation method of functional micro-nano calcium carbonate, which comprises the following steps: adding screened limestone and fuel into a kiln regularly and quantitatively from the top of the kiln, calcining at 925-1100 DEG C, cooling to obtain calcium oxide, collecting a byproduct carbon dioxide for later use, adding water into the calcium oxide for digestion to obtain calcium hydroxide raw slurry, aging, and drying to obtain the functional micro-nano calcium carbonate. The preparation method comprises the following steps: preparing calcium hydroxide raw refined slurry, sieving to remove impurities, adjusting the temperature and the mass percentage concentration of the calcium hydroxide raw refined slurry, adding the calcium hydroxide raw refined slurry into a bubbling carbonization tower reactor, introducing carbon dioxide gas, carrying out bubbling carbonization, and stopping carbonization until the pH value of the slurry is less than or equal to 7.2, so as to prepare calcium carbonate boiled slurry; and carrying out filter pressing dehydration on the calcium carbonate boiled slurry until the water content is 20% to prepare an active calcium carbonate filter cake, putting the active calcium carbonate filter cake in an oven at 55 DEG C, carrying out vacuum drying overnight, and carrying out secondary treatment to obtain the micro-nano calcium carbonate. The invention has the advantages of high production efficiency and short drying time.
本发明公开了一种功能性微纳米碳酸钙的制备方法，将经筛选的石灰石及燃料定时、定量由窑顶加入窑内，于925～1100℃煅烧，再经冷却即得氧化钙，副产品二氧化碳收集备用，氧化钙加水消化后制得氢氧化钙生浆，经陈化，过筛除去杂质后制得氢氧化钙生精浆，调节氢氧化钙生精浆的温度和质量百分浓度，然后将氢氧化钙生精浆加入鼓泡碳化塔反应器中通入二氧化碳气体进行碳化鼓泡碳化，碳化至浆液pH≤7.2时停止碳化，制得碳酸钙熟浆，碳酸钙熟浆经压滤脱水至含水量为20％，制得活性碳酸钙滤饼，放在55℃烘箱真空干燥过夜，经二次处理后得到微纳米碳酸钙。本发明的优点：生产效率高，干燥时间短。
Preparation method of functional micro-nano calcium carbonate
The invention discloses a preparation method of functional micro-nano calcium carbonate, which comprises the following steps: adding screened limestone and fuel into a kiln regularly and quantitatively from the top of the kiln, calcining at 925-1100 DEG C, cooling to obtain calcium oxide, collecting a byproduct carbon dioxide for later use, adding water into the calcium oxide for digestion to obtain calcium hydroxide raw slurry, aging, and drying to obtain the functional micro-nano calcium carbonate. The preparation method comprises the following steps: preparing calcium hydroxide raw refined slurry, sieving to remove impurities, adjusting the temperature and the mass percentage concentration of the calcium hydroxide raw refined slurry, adding the calcium hydroxide raw refined slurry into a bubbling carbonization tower reactor, introducing carbon dioxide gas, carrying out bubbling carbonization, and stopping carbonization until the pH value of the slurry is less than or equal to 7.2, so as to prepare calcium carbonate boiled slurry; and carrying out filter pressing dehydration on the calcium carbonate boiled slurry until the water content is 20% to prepare an active calcium carbonate filter cake, putting the active calcium carbonate filter cake in an oven at 55 DEG C, carrying out vacuum drying overnight, and carrying out secondary treatment to obtain the micro-nano calcium carbonate. The invention has the advantages of high production efficiency and short drying time.
本发明公开了一种功能性微纳米碳酸钙的制备方法，将经筛选的石灰石及燃料定时、定量由窑顶加入窑内，于925～1100℃煅烧，再经冷却即得氧化钙，副产品二氧化碳收集备用，氧化钙加水消化后制得氢氧化钙生浆，经陈化，过筛除去杂质后制得氢氧化钙生精浆，调节氢氧化钙生精浆的温度和质量百分浓度，然后将氢氧化钙生精浆加入鼓泡碳化塔反应器中通入二氧化碳气体进行碳化鼓泡碳化，碳化至浆液pH≤7.2时停止碳化，制得碳酸钙熟浆，碳酸钙熟浆经压滤脱水至含水量为20％，制得活性碳酸钙滤饼，放在55℃烘箱真空干燥过夜，经二次处理后得到微纳米碳酸钙。本发明的优点：生产效率高，干燥时间短。
Preparation method of functional micro-nano calcium carbonate
一种功能性微纳米碳酸钙的制备方法
LUO MINGFEI (Autor:in)
18.07.2023
Patent
Elektronische Ressource
Chinesisch
Preparation method of modified nano calcium carbonate
| Europäisches Patentamt | 2020
Preparation method of nano calcium carbonate feed gas
| Europäisches Patentamt | 2023
High-purity nano calcium carbonate and preparation method thereof
| Europäisches Patentamt | 2023
Preparation method of nano calcium carbonate for photovoltaic sealant
| Europäisches Patentamt | 2023
Preparation method of enhanced nano calcium carbonate doped polycarboxylate superplasticizer
| Europäisches Patentamt | 2022