Method for producing crushed limestone for mineral paper using precipitated calcium carbonate with improved whiteness

The present invention relates to a method for producing crushed limestone for mineral paper with improved whiteness using precipitated calcium carbonate, and more specifically, provides a method for producing crushed limestone for mineral paper with improved whiteness using precipitated calcium carb...

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Bibliographische Detailangaben
Hauptverfasser: BANG SOON YOUNG, HAN KI HYUN, KIM IL SEONG
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:The present invention relates to a method for producing crushed limestone for mineral paper with improved whiteness using precipitated calcium carbonate, and more specifically, provides a method for producing crushed limestone for mineral paper with improved whiteness using precipitated calcium carbonate which comprises: a crushing and coating step which inserts a calcium hydroxide aqueous solution while crushing limestone jaw-crushed and cone-crushed by a wet process and coats calcium hydroxide on a surface of the crushed limestone; a precipitated calcium carbonate membrane generating step which puts the limestone slurry crushed and coated during the crushing and coating step into an agitator and inserts carbon dioxide while agitating the same; a drying step; and a disintegrating step. Accordingly, the producing method can increase process efficiency and uniformly coat precipitated calcium carbonate compared with existing technologies. 침강성 탄산칼슘을 사용한 향상된 백색도를 가진 미네랄 페이퍼용 석회석 분쇄물의 제조방법으로서, 보다 상세하게는 조쇄 및 중쇄한 석회석을 습식공정으로 분쇄하면서 수산화칼슘 수용액을 장입하여, 분쇄된 상기 석회석의 표면에 수산화칼슘을 코팅하는 분쇄 및 코팅단계; 상기 분쇄 및 코팅단계에서 분쇄 및 코팅된 석회석 슬러리를 교반기에 옮기고 탄산가스를 취입하면서 동시에 교반하는 침강성 탄산칼슘막 생성단계; 건조단계; 및 해쇄단계; 를 포함하는 것을 특징으로 하여, 종래 기술에 비해 공정 효율성이 증대되고, 침강성 탄산칼슘을 균일하게 코팅할 수 있어 향상된 백색도를 가진 미네랄 페이퍼용 석회석 분쇄물의 제조방법을 제공한다.