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Calcined gypsum coagulant and preparation method thereof
The invention discloses a calcined gypsum coagulant and a preparation method thereof. The calcined gypsum coagulant is gypsum obtained after drying and ball milling; the content of attached water in the gypsum is 0, and the content of crystal water of the gypsum is larger than 17 wt.%; the grade of the gypsum is 80% or above (the grade of the gypsum is equal to the product of crystal water% and 4.78); the specific surface area of the gypsum is 2000-5000 cm <2>/g. The preparation method of the calcined gypsum coagulant comprises the following steps of: drying gypsum; and carrying out ball milling. With the calcined gypsum coagulant provided by the invention, the defects of long time consumption during the low-temperature drying of the gypsum and difficulty in control during the high-temperature drying of the gypsum can be eliminated; the control of the crystal water ensures the effective components of the coagulant, and the problem that the stability of a coagulation and the strength and cohesiveness of plates are influenced when potassium sulfate, waste plates or trimming wastes are used as the coagulant in the prior art is solved.
本发明公开了一种熟石膏促凝剂及其制备方法。所述熟石膏促凝剂为经过烘干球磨后得到的生石膏，所述生石膏中附着水含量为0，且结晶水含量大于17wt.％，石膏品位在80％以上(石膏品位＝结晶水％×4.78)，并且其比表面积为2000‑5000cm/g。所述熟石膏促凝剂的制备方法为将生石膏烘干后球磨。本发明提供的熟石膏促凝剂，解决了采用低温烘干石膏耗时长，高温烘干不易控制的缺点，同时结晶水的控制保证了促凝剂的有效成分，解决了现有技术中以硫酸钾、废板或切边废料作为促凝剂，会影响促凝稳定性以及板材强度和粘结性的问题。
Calcined gypsum coagulant and preparation method thereof
The invention discloses a calcined gypsum coagulant and a preparation method thereof. The calcined gypsum coagulant is gypsum obtained after drying and ball milling; the content of attached water in the gypsum is 0, and the content of crystal water of the gypsum is larger than 17 wt.%; the grade of the gypsum is 80% or above (the grade of the gypsum is equal to the product of crystal water% and 4.78); the specific surface area of the gypsum is 2000-5000 cm <2>/g. The preparation method of the calcined gypsum coagulant comprises the following steps of: drying gypsum; and carrying out ball milling. With the calcined gypsum coagulant provided by the invention, the defects of long time consumption during the low-temperature drying of the gypsum and difficulty in control during the high-temperature drying of the gypsum can be eliminated; the control of the crystal water ensures the effective components of the coagulant, and the problem that the stability of a coagulation and the strength and cohesiveness of plates are influenced when potassium sulfate, waste plates or trimming wastes are used as the coagulant in the prior art is solved.
本发明公开了一种熟石膏促凝剂及其制备方法。所述熟石膏促凝剂为经过烘干球磨后得到的生石膏，所述生石膏中附着水含量为0，且结晶水含量大于17wt.％，石膏品位在80％以上(石膏品位＝结晶水％×4.78)，并且其比表面积为2000‑5000cm/g。所述熟石膏促凝剂的制备方法为将生石膏烘干后球磨。本发明提供的熟石膏促凝剂，解决了采用低温烘干石膏耗时长，高温烘干不易控制的缺点，同时结晶水的控制保证了促凝剂的有效成分，解决了现有技术中以硫酸钾、废板或切边废料作为促凝剂，会影响促凝稳定性以及板材强度和粘结性的问题。
Calcined gypsum coagulant and preparation method thereof
一种熟石膏促凝剂及其制备方法
ZHANG HE (author) / LI FAN (author) / QI TINGTING (author) / CONG YU (author)
2020-09-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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