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Method for removing impurities from ardealite and preparing white anhydrous ardealite
The invention provides a method for removing impurities from ardealite and preparing white anhydrous ardealite. The method comprises the following steps: carrying out first calcination treatment on ardealite to obtain semi-hydrated ardealite, and sequentially carrying out acid treatment and second calcination treatment on the semi-hydrated ardealite to obtain the white anhydrous ardealite. According to the method, insoluble substances in the ardealite can be effectively removed, and the whiteness of the ardealite is greatly improved; the method is easy to operate, low in cost and good in whitening effect; and a new way is opened up for industrial harmless treatment and comprehensive utilization of the waste ardealite.
本发明提供了一种磷石膏除杂及制备白色无水磷石膏的方法，所述方法包括以下步骤：将磷石膏进行第一煅烧处理得到半水磷石膏，将所述半水磷石膏依次进行酸处理和第二煅烧处理后得到白色无水磷石膏。本发明可有效去除磷石膏中的难溶物，大大提高了磷石膏的白度，所述方法操作简单、成本低、增白效果好，为废弃磷石膏的工业无害化处理和综合利用开辟新途径。
Method for removing impurities from ardealite and preparing white anhydrous ardealite
The invention provides a method for removing impurities from ardealite and preparing white anhydrous ardealite. The method comprises the following steps: carrying out first calcination treatment on ardealite to obtain semi-hydrated ardealite, and sequentially carrying out acid treatment and second calcination treatment on the semi-hydrated ardealite to obtain the white anhydrous ardealite. According to the method, insoluble substances in the ardealite can be effectively removed, and the whiteness of the ardealite is greatly improved; the method is easy to operate, low in cost and good in whitening effect; and a new way is opened up for industrial harmless treatment and comprehensive utilization of the waste ardealite.
本发明提供了一种磷石膏除杂及制备白色无水磷石膏的方法，所述方法包括以下步骤：将磷石膏进行第一煅烧处理得到半水磷石膏，将所述半水磷石膏依次进行酸处理和第二煅烧处理后得到白色无水磷石膏。本发明可有效去除磷石膏中的难溶物，大大提高了磷石膏的白度，所述方法操作简单、成本低、增白效果好，为废弃磷石膏的工业无害化处理和综合利用开辟新途径。
Method for removing impurities from ardealite and preparing white anhydrous ardealite
一种磷石膏除杂及制备白色无水磷石膏的方法
LI SHANSHAN (author) / LIU RONGRONG (author) / HOU MEISHUN (author)
2021-11-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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