Journal of the Korean Society of Mineral and Energy Resources Engineers (한국자원공학회지)

The Korean Society of Mineral and Energy Resources Engineers (한국자원공학회)
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Froth Flotation of Molybdenite Ore from Dong-won NMC Mine

동원 NMC 몰리브덴광의 浮遊選別 特性

Park, Chul-Hyun;Jeon, Ho-Seok;Kim, Byoung-Gon;Kim, Hyung-Seok;Han, Oh-Hyung
박철현;전호석;김병곤;김형석;한오형

  • Published : 20091200
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Abstract

Froth flotation of molybdenite ore (Mo 0.35%) from Dong-won NMC mine has been carried out for to produce high-grade molybdenite concentrate. The over 75 g/t dosage of collector (kerosene) was effective to increase the floatability of molybdenite. The stable froth was formed when the ratio of frother vs collector was 1:1 or over. The natural pH of pulp was relatively high as 8.7. The molybdenite concentrate was agglomerated at pH 4-6 close to the point of zero charge (PZC) of molybdenite between pH 2-3. The cddition of sodium silicate (Na$_2$SiO$_3$) as pH modifier could increase pH of pulp up to 11. It was demonstrated that sodium silicate can be used not only as pH modifier but also as depressant of gangue minerals and dispersant of slime. The concentrate of 53.5% Mo grade (MoS$_2$, 89.3%) with 92.7% recovery from NMC molybdenite ores was obtained under conditions of 20% pulp concentration, 75 g/t frother (AF65), 1.25 kg/t depressant (Na$_2$SiO$_3$), pH 10 and 2 cleaning times.

동원 NMC(구. 금성 몰리브덴광산) 몰리브덴광(Mo 0.35%)을 대상으로 고품위 몰리브덴 정광생산을 위한 부유선별 연구를 수행하였다. 몰리브덴광의 부유도를 높이는 유상 포수제(kerosene)의 첨가량은 75 g/t 이상이 효과적이었으며, 기포제와 포수제의 비율이 각각 1대1일 이상일 때 안정한 포말층이 형성되었다. 광액의 자연 pH는 8.7이었으며, 몰리브덴광의 등전점(PZC)인 pH 2-3 영역에 근접한 pH 4-6에서는 몰리브덴광이 응집되는 현상이 확인되었다. pH 조절제로 규산소다가 광액의 pH를 11까지 조절할 수 있어, 규산소다 단독으로 pH 조절제, 슬라임의 분산제 그리고 맥석광물 억제제로 사용할 수 있음을 확인하였다. 따라서 부유선별 최적 조건인 광액농도 20%, 포수제(kerosene) 75 g/t, 기포제(AF65) 75 g/t, 억제제(Na$_2$SiO$_3$) 1.25 kg/t, pH 10 그리고 정선횟수 2회에서, Mo 품위와 회수율이 각각 53.5%(MoS$_2$, 89.3%)와 92.7%인 몰리브덴 정광을 생산할 수 있었다.

Keywords

References

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