부유선별법에 의한 복합 황화광으로부터 As 제거
Removal of Arsenic from Complex Sulfide Minerals by Flotation
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초록
In Korea, Janggun mine that produces the concentrate of galena (PbS) /sphalerite (ZnS) containing arsenic of 1.3% charges a penalty of US$ 1000/ton to LS-Nikko smelter. Hence in this work, flotation tests for removal of arsenopyrite (FeAsS) from sulfide minerals were carried out using lab scale flotation cell, which maintain grade and recovery of PbS and ZnS in comparison to flotation plant. Particularly, this study was focused on investigating the combination of several chemical reagents (depressant, collector, activator and etc.) that affect flotation performance. In the straight differential flotation for PbS, a Pb grade of 67.80% and a recovery of 80.2% could be obtained with FeAsS removal of 84.1% (0.2% As) under the conditions of 20% feed solids concentration, pH 8.5, 50g/t frother (AF65), 50g/t collector (AP242) and 600g/t As depressant (NaHSO3) and 600g/t Zn depressant (ZnSO4). In the ZnS flotation, the maximum separation achievable for ZnS using froth flotation has been shown to be a grade of 50.27% and a recovery of 88.7%. At this time, FeAsS removal of 87.8% (0.16% As) could be successfully accomplished under pH 11, and 1.2kg/t Zn activator (CuSO4), 100g/t frother (AF65), 100g/t collector (AP211) and 400g/t As depressant (NaHSO3).
Abstract
In Korea, Janggun mine that produces the concentrate of galena (PbS) /sphalerite (ZnS) containing arsenic of 1.3% charges a penalty of US$ 1000/ton to LS-Nikko smelter. Hence in this work, flotation tests for removal of arsenopyrite (FeAsS) from sulfide minerals were carried out using lab scale flotation cell, which maintain grade and recovery of PbS and ZnS in comparison to flotation plant. Particularly, this study was focused on investigating the combination of several chemical reagents (depressant, collector, activator and etc.) that affect flotation performance. In the straight differential flotation for PbS, a Pb grade of 67.80% and a recovery of 80.2% could be obtained with FeAsS removal of 84.1% (0.2% As) under the conditions of 20% feed solids concentration, pH 8.5, 50g/t frother (AF65), 50g/t collector (AP242) and 600g/t As depressant (NaHSO3) and 600g/t Zn depressant (ZnSO4). In the ZnS flotation, the maximum separation achievable for ZnS using froth flotation has been shown to be a grade of 50.27% and a recovery of 88.7%. At this time, FeAsS removal of 87.8% (0.16% As) could be successfully accomplished under pH 11, and 1.2kg/t Zn activator (CuSO4), 100g/t frother (AF65), 100g/t collector (AP211) and 400g/t As depressant (NaHSO3).
참고문헌 (6)
- Choi, D, Y, "Characteristics of flotation of lead-zinc ore in janggun limestone formation at Rycongnam massif", 1 (2011), Chonnam National University
- Lee, G, R, "Lead and zinc oxide mineral dressing (Focusing on the Sunshine operation of Jang gun mine)", Mining promotion, 33, pp.110~115
- Lee, G, M, "Mineral Processing Engineering", pp.219~305 (1985), Bando Publishing Co
- Houot, R., "Activation of sphalerite flotation in the presence of lead ions", International Journal of Mineral Processing, 35(3-4), pp.253~271 (1992)
- Seke, M. D., "Effect of cuprous cyanide, dry and wet milling on the selective flotation of galena and sphalerite", Mineral Engineering, 19, pp.1~11 (2006)
- Trahar, W. J., "The activation of sphalerite by lead a flotation perspective", International —Journal of Mineral Processing, 49(3-4), pp.121~148 (1997)