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    • 8. 发明公开
    • 인산석고의 열처리를 통한 제지용 충전제 제조방법 및 그 용도
    • 通过预加热磷胶制造纸张填料的方法及其用途
    • KR1020140027834A
    • 2014-03-07
    • KR1020120093937
    • 2012-08-27
    • 경상대학교산학협력단충남대학교산학협력단
    • 이지영성용주
    • D21H17/67C04B35/447
    • C04B35/547C04B2235/448D21H17/67
    • The present invention relates to a technique of producing anhydrous gypsum by recycling phosphogypsum which is an industrial byproduct generated from a process of phosphatic fertilizer production, and using the anhydrous gypsum as paper filler, more specifically to paper filler produced by heat processing the anhydrous gypsum at 500-1,200°C for 1-3 hours for increasing whiteness degrees. The paper filler by the present invention can replace talc, and paper containing the paper filler has similar whiteness degrees, improved opacity, and improved physical properties compare to paper produced by adding talc. [Reference numerals] (AA) Raw material of printing paper; (BB) Select; (CC) Beat; (DD) Mix the raw material and thermally processed gypsum; (EE) Use as the raw material of printing paper; (FF) Pre-process phosphogypsum and manufacture a filler; (GG) Collect the phosphogypsum; (HH) Heat-process at 500-12,000°C during 1-3 hours; (II) Disperse as slurry after grinding and selecting
    • 本发明涉及通过回收磷酸石膏来生产无水石膏的技术,该磷石膏是磷酸肥生产过程中产生的工业副产物,并且使用无水石膏作为纸填料,更具体地说,涉及通过热处理无水石膏 500-1200℃,提高白度度1-3小时。 通过本发明的纸填料可以代替滑石,与通过添加滑石产生的纸相比,含有纸填料的纸具有相似的白度,改善的不透明度和改善的物理性能。 (附图标记)(AA)打印纸的原料; (BB)选择; (CC)打败; (DD)混合原料和热处理石膏; (EE)用作打印纸的原料; (FF)预处理磷石膏并制造填料; (GG)收集磷石膏; (HH)在1-3小时内在500-12,000℃下进行热处理; (II)研磨和选择后作为浆料分散