Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alpha semi-hydrated gypsum and preparation method thereof
The invention provides alpha semi-hydrated gypsum and a preparation method thereof, and belongs to the technical field of resource reutilization. The preparation method comprises the following steps: washing undisturbed phosphogypsum with water, and drying to obtain a solid material; naCl, KCl, Na2SO4, sulfuric acid and water are mixed, and a salt solution is obtained; mixing the salt solution, the solid material and water to obtain slurry; mixing the slurry and a crystal modifier for crystal transformation to obtain a crystal transformation product; and sequentially carrying out solid-liquid separation and drying on the crystal transformation product to obtain the alpha-semi-hydrated gypsum. According to the method, the salt solution is used, and the crystal modifier including sodium citrate, succinic acid, maleic acid and sodium alkyl sulfate is specifically limited, so that the whole crystal transformation process can be completed in an industrial normal-pressure environment, the whole process is low in cost, high-purity and high-grade alpha-semi-hydrated gypsum can be produced, the crystal transformation efficiency is high, and the method is suitable for industrial production. And the prepared alpha semi-hydrated gypsum is in a short column shape, so that a large amount of phosphogypsum is expected to be consumed, and the development of the phosphorus chemical industry is promoted.
本发明提供了一种α半水石膏及其制备方法，属于资源再利用技术领域。本发明将原状磷石膏进行水洗后干燥，得到固体物料；将NaCl、KCl、Na2SO4、硫酸和水混合，得到盐溶液；将盐溶液、固体物料和水混合，得到浆料；将浆料和转晶剂混合进行转晶，得到转晶产物；将转晶产物依次进行固液分离和干燥，得到所述α半水石膏。本发明通过使用盐溶液，结合具体限定了转晶剂包括柠檬酸钠、丁二酸、顺丁烯二酸和烷基硫酸钠，使得整个转晶过程可以在工业常压环境下完成，整套流程成本低，可生产高纯度高品位的α半水石膏，转晶效率高，且制得的α半水石膏呈短柱状，有望大量消耗现有磷石膏存量，促进磷化工行业的发展。
Alpha semi-hydrated gypsum and preparation method thereof
The invention provides alpha semi-hydrated gypsum and a preparation method thereof, and belongs to the technical field of resource reutilization. The preparation method comprises the following steps: washing undisturbed phosphogypsum with water, and drying to obtain a solid material; naCl, KCl, Na2SO4, sulfuric acid and water are mixed, and a salt solution is obtained; mixing the salt solution, the solid material and water to obtain slurry; mixing the slurry and a crystal modifier for crystal transformation to obtain a crystal transformation product; and sequentially carrying out solid-liquid separation and drying on the crystal transformation product to obtain the alpha-semi-hydrated gypsum. According to the method, the salt solution is used, and the crystal modifier including sodium citrate, succinic acid, maleic acid and sodium alkyl sulfate is specifically limited, so that the whole crystal transformation process can be completed in an industrial normal-pressure environment, the whole process is low in cost, high-purity and high-grade alpha-semi-hydrated gypsum can be produced, the crystal transformation efficiency is high, and the method is suitable for industrial production. And the prepared alpha semi-hydrated gypsum is in a short column shape, so that a large amount of phosphogypsum is expected to be consumed, and the development of the phosphorus chemical industry is promoted.
本发明提供了一种α半水石膏及其制备方法，属于资源再利用技术领域。本发明将原状磷石膏进行水洗后干燥，得到固体物料；将NaCl、KCl、Na2SO4、硫酸和水混合，得到盐溶液；将盐溶液、固体物料和水混合，得到浆料；将浆料和转晶剂混合进行转晶，得到转晶产物；将转晶产物依次进行固液分离和干燥，得到所述α半水石膏。本发明通过使用盐溶液，结合具体限定了转晶剂包括柠檬酸钠、丁二酸、顺丁烯二酸和烷基硫酸钠，使得整个转晶过程可以在工业常压环境下完成，整套流程成本低，可生产高纯度高品位的α半水石膏，转晶效率高，且制得的α半水石膏呈短柱状，有望大量消耗现有磷石膏存量，促进磷化工行业的发展。
Alpha semi-hydrated gypsum and preparation method thereof
一种α半水石膏及其制备方法
LI XIAOQIN (Autor:in) / LIU YUHANG (Autor:in)
24.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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