Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing semi-hydrated gypsum powder by phosphogypsum normal-pressure salt solution method and semi-hydrated gypsum powder
The invention provides a method for preparing semi-hydrated gypsum powder through a phosphogypsum normal-pressure saline solution method and the semi-hydrated gypsum powder, and relates to the technical field of waste recovery. The method comprises the steps that mixed liquid of salt and a crystal modifier and purified phosphogypsum are prepared into slurry, and the crystal modifier is a betaine compound with pH responsiveness; and adjusting the pH value of the slurry according to the isoelectric point of the crystal modifier and the length-diameter ratio of the required semi-hydrated gypsum crystal, carrying out constant-temperature dynamic reaction on the slurry, and filtering to obtain the semi-hydrated gypsum. Wherein when the pH value of the slurry is greater than the isoelectric point of the crystal modifier, the length-diameter ratio of the semi-hydrated gypsum crystal is increased, and when the pH value of the slurry is less than the isoelectric point of the crystal modifier, the length-diameter ratio of the semi-hydrated gypsum crystal is reduced. According to the present invention, the betaine compound is adopted as the crystal modifier, and the hemihydrate gypsum crystals with different length-diameter ratios can be obtained by adjusting the pH value of the slurry so as to achieve the regulation of the crystal morphology of the hemihydrate gypsum, and the regulation of the crystal morphology presents a certain rule.
本公开提供了一种磷石膏常压盐溶液法制半水石膏粉的方法和半水石膏粉，涉及废物回收技术领域。该方法包括：将盐和转晶剂的混合液与净化的磷石膏，配制成浆体，其中，转晶剂为具有pH响应性的甜菜碱化合物；根据转晶剂的等电点和所需半水石膏晶体的长径比，调节浆体的pH，对浆体进行恒温动态反应，过滤，即得；其中，当浆体pH值大于所述转晶剂的等电点时，半水石膏晶体的长径比增大，当浆体pH值小于转晶剂的等电点时，半水石膏晶体的长径比减小。本公开采用甜菜碱化合物作为转晶剂，可以通过调节浆体的pH值以获得不同长径比的半水石膏晶体，从而实现对半水石膏的结晶形貌进行调控，并且在调控结晶形貌呈现一定的规律。
Method for preparing semi-hydrated gypsum powder by phosphogypsum normal-pressure salt solution method and semi-hydrated gypsum powder
The invention provides a method for preparing semi-hydrated gypsum powder through a phosphogypsum normal-pressure saline solution method and the semi-hydrated gypsum powder, and relates to the technical field of waste recovery. The method comprises the steps that mixed liquid of salt and a crystal modifier and purified phosphogypsum are prepared into slurry, and the crystal modifier is a betaine compound with pH responsiveness; and adjusting the pH value of the slurry according to the isoelectric point of the crystal modifier and the length-diameter ratio of the required semi-hydrated gypsum crystal, carrying out constant-temperature dynamic reaction on the slurry, and filtering to obtain the semi-hydrated gypsum. Wherein when the pH value of the slurry is greater than the isoelectric point of the crystal modifier, the length-diameter ratio of the semi-hydrated gypsum crystal is increased, and when the pH value of the slurry is less than the isoelectric point of the crystal modifier, the length-diameter ratio of the semi-hydrated gypsum crystal is reduced. According to the present invention, the betaine compound is adopted as the crystal modifier, and the hemihydrate gypsum crystals with different length-diameter ratios can be obtained by adjusting the pH value of the slurry so as to achieve the regulation of the crystal morphology of the hemihydrate gypsum, and the regulation of the crystal morphology presents a certain rule.
本公开提供了一种磷石膏常压盐溶液法制半水石膏粉的方法和半水石膏粉，涉及废物回收技术领域。该方法包括：将盐和转晶剂的混合液与净化的磷石膏，配制成浆体，其中，转晶剂为具有pH响应性的甜菜碱化合物；根据转晶剂的等电点和所需半水石膏晶体的长径比，调节浆体的pH，对浆体进行恒温动态反应，过滤，即得；其中，当浆体pH值大于所述转晶剂的等电点时，半水石膏晶体的长径比增大，当浆体pH值小于转晶剂的等电点时，半水石膏晶体的长径比减小。本公开采用甜菜碱化合物作为转晶剂，可以通过调节浆体的pH值以获得不同长径比的半水石膏晶体，从而实现对半水石膏的结晶形貌进行调控，并且在调控结晶形貌呈现一定的规律。
Method for preparing semi-hydrated gypsum powder by phosphogypsum normal-pressure salt solution method and semi-hydrated gypsum powder
一种磷石膏常压盐溶液法制半水石膏粉的方法和半水石膏粉
XIE YINGHAO (Autor:in) / YU HAIJUN (Autor:in) / LI AIXIA (Autor:in) / WANG TAO (Autor:in) / LI CHANGDONG (Autor:in)
16.04.2024
Patent
Elektronische Ressource
Chinesisch
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