Method for producing high purity slaked lime and using by-product gypsum: Fid-Bau Portal

Method for producing high purity slaked lime and using by-product gypsum

KIM HYUCK SOO / YANG JAE E

Disclosed in the present invention is a method for manufacturing slaked lime using by-product gypsum, which includes the steps of: a solvent mixing step of mixing a solvent containing a strong alkali and water with by-product gypsum to form reaction slurry; a reaction step of generating slaked lime by reacting the by-product gypsum with the strong alkali of the solvent in the reaction slurry; and a washing step of washing the reaction slurry with water to remove ionic components and separate slaked lime. Additionally, disclosed in the present invention is a method for manufacturing quicklime, which further includes a calcination step of calcining the prepared slaked lime at a calcination temperature of 500 to 700°C to form the quicklime. Therefore, it is possible to minimize the content of by-products produced while using the by-product gypsum as a raw material.

본 발명은 강염기와 물을 포함하는 용매를 부산 석고와 혼합하여 반응 슬러리를 형성하는 용매 혼합 단계와, 상기 반응 슬러리내에서 부산 석고와 용매의 강염기가 반응하여 소석회를 생성하는 반응 단계 및 상기 반응 슬러리를 물로 세척하여 이온 성분을 제거하고 소석회를 분리하는 세척 단계를 포함하는 부산 석고를 이용한 소석회 제조 방법과 제조된 소석회를 500 ∼ 700℃의 소성 온도에서 소성하여 생석회를 형성하는 소성 단계를 더 포함하는 부산 석고를 이용한 생석회 제조 방법을 개시한다.

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