Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing anhydrous calcium sulfate by pretreating industrial byproduct gypsum
The invention discloses a method for preparing anhydrous calcium sulfate by pretreating industrial by-product gypsum, which comprises the following steps: heating and drying the industrial by-product gypsum, mixing the industrial by-product gypsum with a dilute sulfuric acid solution at normal temperature while the industrial by-product gypsum is hot, reacting, and sequentially filtering, washing and drying the reactant to obtain the anhydrous calcium sulfate. The method has the characteristics of small wastewater amount, lower wastewater treatment cost, lower equipment corrosion rate, lower equipment investment cost and low heating energy consumption; in addition, the method has the characteristic of high production efficiency.
本发明公开了一种工业副产石膏预处理制备无水硫酸钙的方法，先将工业副产石膏加热烘干，然后趁热与常温的稀硫酸溶液混合后反应，将反应物依次过滤、洗涤和烘干后，获得无水硫酸钙。本发明具有废水量少，废水处理成本较低，设备腐蚀速率较慢，设备投入成本较低，以及加热能耗低的特点；此外，还具有生产效率高的特点。
Method for preparing anhydrous calcium sulfate by pretreating industrial byproduct gypsum
The invention discloses a method for preparing anhydrous calcium sulfate by pretreating industrial by-product gypsum, which comprises the following steps: heating and drying the industrial by-product gypsum, mixing the industrial by-product gypsum with a dilute sulfuric acid solution at normal temperature while the industrial by-product gypsum is hot, reacting, and sequentially filtering, washing and drying the reactant to obtain the anhydrous calcium sulfate. The method has the characteristics of small wastewater amount, lower wastewater treatment cost, lower equipment corrosion rate, lower equipment investment cost and low heating energy consumption; in addition, the method has the characteristic of high production efficiency.
本发明公开了一种工业副产石膏预处理制备无水硫酸钙的方法，先将工业副产石膏加热烘干，然后趁热与常温的稀硫酸溶液混合后反应，将反应物依次过滤、洗涤和烘干后，获得无水硫酸钙。本发明具有废水量少，废水处理成本较低，设备腐蚀速率较慢，设备投入成本较低，以及加热能耗低的特点；此外，还具有生产效率高的特点。
Method for preparing anhydrous calcium sulfate by pretreating industrial byproduct gypsum
一种工业副产石膏预处理制备无水硫酸钙的方法
CHEN QIANLIN (Autor:in) / FANG KENENG (Autor:in)
02.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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