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2019 Vol.56, Issue 4

Research Paper

The Recovery of Invisible Gold Using Filter Paper

여과지를 이용한 비-가시성 금 회수

Jong Ju Lee1
,
Cheon Young Park1*
이 종주1
,
박 천영1*
1조선대학교 에너지자원공학과
* Corresponding Author
30 August 2019. pp. 315-325
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Abstract

The purpose of this study was to recover gold from invisible concentrate using microwave-nitric acid leaching and filter paper. A microwave nitric acid leaching experiment was conducted to liberate gold from invisible gold concentrate (Au = 1,765.50 g/t) using different concentrations of nitric acid. Gold was not detected in the analyzed leaching solution (1 M–6 M). This indicates that the gold was not dissolved in the nitric acid solution and was present as a solid phase in the leaching solution. This solution was filtrated using filter paper that was then used for a lead-fire assay. Using this assay, gold was discovered on all the utilized filter paper: 2,361.60 g/t and 7,355.50 g/t from the 1st paper; 31.36 g/t and 673.81 g/t from the 2nd paper and 20.69 g/t and 190.91 g/t from the 3rd paper. It was confirmed that invisible gold was present as a solid phase in the leaching solution.

Keywords
invisible gold
microwave-nitric acid leaching
filter paper
lead-fire assay

비가시성 금 정광으로부터 금을 회수하기 위하여 마이크로웨이브-질산용출과 여과지를 이용하였다. 비가시성 금이 함유된 정광(Au = 1,765.50 g/t)을 마이크로웨이브-질산용출 하여 용출용액에 대하여 금을 분석하였으나 1-6 M 범위의 용출용액 모두에서 불검출로 나타났다. 이것은 질산 용액에 금이 용해되지 않고 고체상으로 존재하고 있음을 의미한다. 용출용액을 여과지로 여과하고, 그 여과지를 납 시금법에 투입한 결과 첫 번째 여과지에서 2,361.60-7,355.50 g/t 범위의 금이, 두 번째 여과지에서 31.36-673.81 g/t 범위의 금이 그리고 세 번째 여과지에서 20.69-190.91 g/t 범위의 금이 얻어졌다. 이것은 용출용액에 금이 고체상으로 존재하는 것을 확신시켜준다.

키워드
비가시성 금
마이크로웨이브-질산용출
여과지
납 시금법
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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 :4
  • Pages :315-325
  • Received Date : 2019-07-26
  • Revised Date : 2019-08-23
  • Accepted Date : 2019-08-23
  • DOI :https://doi.org/10.32390/ksmer.2019.56.4.315
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