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Method for increasing compressive strength of phosphogypsum
The invention discloses a method for increasing the compressive strength of ardealite, which comprises the following steps: S100, taking ardealite solid, adding water, and stirring; s200, oxalic acid or oxalate is added, and the adding amount is 1%-6%; and S300, after the materials are fully and uniformly stirred, the wet materials are dried, and the drying temperature is 100-120 DEG C. And S400, crushing the dried phosphogypsum, wherein the particle size is between 100 and 200 meshes. Hydroxyl in oxalate reacts with hydroxyl ions in a phosphogypsum wet material, on one hand, carbon dioxide is released, and a new cementing material is formed; on the other hand, calcium carbonate is generated, shrinkage of the ardealite is reduced, in addition, cations in the oxalate are combined with anions in the ardealite to form new salts, and the structure of the ardealite is stabilized.
本发明公开了一种增加磷石膏抗压强度的方法，包括以下步骤：S100：取磷石膏固体，加入水搅拌；S200：加入草酸或草酸盐，添加量为1％～6％；S300：待充分搅拌均匀后，将湿料进行干燥，干燥温度为100～120℃。S400：将干燥后的磷石膏进行粉碎，粒度在100～200目之间。本发明利用草酸盐中的羟基与磷石膏湿料中的氢氧根离子反应，一方面释放出二氧化碳，形成新的胶凝材料；另一方面生成碳酸钙，减少磷石膏的收缩，此外，草酸盐中的阳离子与磷石膏中阴离子结合形成新的盐类，稳定磷石膏的结构。
Method for increasing compressive strength of phosphogypsum
The invention discloses a method for increasing the compressive strength of ardealite, which comprises the following steps: S100, taking ardealite solid, adding water, and stirring; s200, oxalic acid or oxalate is added, and the adding amount is 1%-6%; and S300, after the materials are fully and uniformly stirred, the wet materials are dried, and the drying temperature is 100-120 DEG C. And S400, crushing the dried phosphogypsum, wherein the particle size is between 100 and 200 meshes. Hydroxyl in oxalate reacts with hydroxyl ions in a phosphogypsum wet material, on one hand, carbon dioxide is released, and a new cementing material is formed; on the other hand, calcium carbonate is generated, shrinkage of the ardealite is reduced, in addition, cations in the oxalate are combined with anions in the ardealite to form new salts, and the structure of the ardealite is stabilized.
本发明公开了一种增加磷石膏抗压强度的方法，包括以下步骤：S100：取磷石膏固体，加入水搅拌；S200：加入草酸或草酸盐，添加量为1％～6％；S300：待充分搅拌均匀后，将湿料进行干燥，干燥温度为100～120℃。S400：将干燥后的磷石膏进行粉碎，粒度在100～200目之间。本发明利用草酸盐中的羟基与磷石膏湿料中的氢氧根离子反应，一方面释放出二氧化碳，形成新的胶凝材料；另一方面生成碳酸钙，减少磷石膏的收缩，此外，草酸盐中的阳离子与磷石膏中阴离子结合形成新的盐类，稳定磷石膏的结构。
Method for increasing compressive strength of phosphogypsum
一种增加磷石膏抗压强度的方法
TANG XUEMEI (author) / WANG MEIBO (author) / XU LI (author) / TAI SHIJUN (author) / LIU HONGJUAN (author) / PAN LINYI (author) / ZHANG XUJIE (author)
2024-04-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Unconfined Compressive Strength of Various Cement-Stabilized Phosphogypsum Mixes
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