Evaluation of Factors Affecting Sludge Volume in Mine Drainage Neutralization

Youngwook Cheong; Choonoh Lee; Joonhak Lee; Sanghyun Cho

doi:10.32390/ksmer.2019.56.6.567

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2019 Vol.56, Issue 6 Next Page

Research Paper

Evaluation of Factors Affecting Sludge Volume in Mine Drainage Neutralization 광산배수 중화과정에서 슬러지 부피에 영향을 주는 인자 평가

31 December 2019. pp. 567-572

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Abstract

In this study, the effect of neutralizer type and concentration, target pH, and elapsed time on sludge volume were evaluated using Ilkwang mine drainage. A higher neutralizer concentration produced more sludge when the pH 7 was neutralized with 5%, 10%, and 20% lime slurry. Neutralization with the same pH with 20% lime and NaOH resulted in less sludge when using lime. The type of neutralizer affected the amount of sludge produced. However, regardless of the type of neutralizer, the volume of the sludge rapidly shrank within one hour and slowly declined thereafter. The control of pH 7 and 10 with 20% lime resulted in considerable sludge at a high pH. A comparison of sludge with 1 L and 1 m³ neutralized mine drainage showed 9% and 10% sludge volume, respectively, as compared to raw mine water. A beaker neutralization experiment was also able to estimate reliable sludge generation.

Keywords

Mine drainage

Neutralizer

Sludge generation

일광광산 광산배수를 대상으로 중화제의 종류 및 농도, 목표 pH, 경과 시간이 슬러지 부피에 미치는 영향을 평가하였다. 5, 10, 20% 액상 소석회로 pH 7까지 중화시킨 결과 고 농도 중화제 사용시 슬러지가 많이 발생했다. 20% 액상 소석회 및 NaOH로 동일 pH로 중화한 결과 소석회 사용시 슬러지 부피가 적게 발생해 중화제 종류가 슬러지 발생량에 영향을 주었다. 그러나 중화제 종류에 무관하게 슬러지 부피는 1시간 이내에 급격히 작아졌고 그 이후 서서히 감소했다. 20% 소석회로 pH 7 및 10으로 조절한 결과 높은 pH에서 슬러지 발생량이 많았다. 광산배수를 1 L 및 1 m³ 중화했을때 슬러지 부피를 비교한 결과 원수 대비 9% 및 10% 나타났다. 비이커 규모의 중화실험으로도 신뢰할 만한 슬러지 발생량을 추정할 수 있었다.

키워드

광산배수

중화제

슬러지 발생

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 56
No :6
Pages :567-572
Received Date : 2019-11-01
Revised Date : 2019-11-19
Accepted Date : 2019-12-20
DOI :https://doi.org/10.32390/ksmer.2019.56.6.567

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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