자원리싸이클링 (Resources Recycling)

  • 제24권1호
  • /
  • Pages.3-11
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  • 2015
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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산 침출 시 실리카 광물의 용해 및 제거

Dissolution and Removal of Silicates in Acid Leaching Process

  • 박경호 (한국지질자원연구원, 제련연구실) ;
  • 남철우 (한국지질자원연구원, 제련연구실) ;
  • 김현호 (한국지질자원연구원, 제련연구실)
  • Park, Kyung-Ho (Extractive metallurgy department, Korea Institute of Geoscience & Mineral Resources) ;
  • Nam, Chul-Woo (Extractive metallurgy department, Korea Institute of Geoscience & Mineral Resources) ;
  • Kim, Hyun-Ho (Extractive metallurgy department, Korea Institute of Geoscience & Mineral Resources)
  • 투고 : 2015.01.07
  • 심사 : 2015.02.11
  • 발행 : 2015.02.28
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초록

산 침출에 있어서 생성되는 가용성 실리카는 고액분리 시 여과를 어렵게 하고 목적금속의 순도를 저하시키는 등 습식제련공정에 있어서 큰 문제점으로 대두되고 있다. 따라서 본 고에서는 실리케이트 광물과 산과의 반응성, 가용성 실리카의 특성, 제거방법에 대하여 검토하였다. 가용성 실리카는 알카리 전처리에 의한 제거, 결정상태의 $SiO_2$로 변환, 응집 등의 방법을 통한 여과성 향상 등의 방법으로 처리할 수 있다.

Soluble silica generated from acid leaching process is very difficult to filter and deceases the purity of products, and thus becomes one of hot issues in hydrometallurgy. This paper reviewed the dissolution and reactivities of silicates in acid solution, and the methods for treatment of soluble silica. Removal of silica with alkaline pre-treatment, crystallization to $SiO_2$ and precipitation behaviour of silica with coagulation under acid conditions were briefly described.

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