Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing gypsum from sulfuric acid-containing wastewater
The invention discloses a method for preparing gypsum from sulfuric acid-containing wastewater. According to the method, lime milk, sulfuric acid-containing wastewater and citric acid are used as rawmaterials to prepare dihydrate gypsum, and the building gypsum is obtained after pretreatment, calcination and ball milling. The building gypsum powder meeting the requirements of building gypsum is prepared by controlling the technological conditions such as lime milk adding frequency, crystal modifier concentration, concentration of the added sulfuric acid solution, pH of a dihydrate gypsum acidpickling solution and dihydrate gypsum calcining temperature. The method has the advantages that the process conditions are simple and convenient, and the production cost is low; the resource utilization of the industrial waste sulfuric acid is realized; the building gypsum prepared by the process is high in strength and can replace natural gypsum to be applied to the building material industry.
本发明公开了一种用含硫酸废水制备石膏的方法。该方法以石灰乳、含硫酸废水、柠檬酸为原料制备二水石膏，经预处理、煅烧、球磨后得到建筑石膏。通过控制石灰乳添加次数、控制转晶剂浓度、加入硫酸溶液的浓度、二水石膏酸洗溶液的pH、二水石膏的煅烧温度等工艺条件，制备出符合建筑石膏要求的建筑石膏粉。本发明的优点是：工艺条件简单便捷、生产成本低；实现了工业废硫酸的资源化利用；此工艺制备的建筑石膏强度高，可以代替天然石膏在建材行业中的应用。
Method for preparing gypsum from sulfuric acid-containing wastewater
The invention discloses a method for preparing gypsum from sulfuric acid-containing wastewater. According to the method, lime milk, sulfuric acid-containing wastewater and citric acid are used as rawmaterials to prepare dihydrate gypsum, and the building gypsum is obtained after pretreatment, calcination and ball milling. The building gypsum powder meeting the requirements of building gypsum is prepared by controlling the technological conditions such as lime milk adding frequency, crystal modifier concentration, concentration of the added sulfuric acid solution, pH of a dihydrate gypsum acidpickling solution and dihydrate gypsum calcining temperature. The method has the advantages that the process conditions are simple and convenient, and the production cost is low; the resource utilization of the industrial waste sulfuric acid is realized; the building gypsum prepared by the process is high in strength and can replace natural gypsum to be applied to the building material industry.
本发明公开了一种用含硫酸废水制备石膏的方法。该方法以石灰乳、含硫酸废水、柠檬酸为原料制备二水石膏，经预处理、煅烧、球磨后得到建筑石膏。通过控制石灰乳添加次数、控制转晶剂浓度、加入硫酸溶液的浓度、二水石膏酸洗溶液的pH、二水石膏的煅烧温度等工艺条件，制备出符合建筑石膏要求的建筑石膏粉。本发明的优点是：工艺条件简单便捷、生产成本低；实现了工业废硫酸的资源化利用；此工艺制备的建筑石膏强度高，可以代替天然石膏在建材行业中的应用。
Method for preparing gypsum from sulfuric acid-containing wastewater
一种用含硫酸废水制备石膏的方法
ZHOU ZUO (Autor:in) / WU JING (Autor:in) / LI ZONGFENG (Autor:in) / QIN ZUZENG (Autor:in) / XIE XINLING (Autor:in)
12.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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