올레인산을 이용한 산성영역에서 주석광의 부유선별 특성연구
Froth Flotation Characteristics of Cassiterite ores with Oleic Acid in Acidic Region
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초록
울진 왕피리 주석광을 대상으로 올레인산(oleic acid) 포수제를 이용한 부유선별 특성연구를 수행하였다. 포수제로 올레인산을 사용하는 경우 목적광물에 대한 선택성이 낮기 때문에, 맥석광물을 억제하기위해서는pH 조절 및 억제제의 선정이 중요하다. 실험결과 주요 맥석 광물인 규산염 광물을 억제하고 cassiterite의 부유선별에 최적 조건을 부여하는 pH는 산성영역임을 확인하였다. 따라서 산성영역에서 cassiterite는 활성화되고 규산염 광물들이 억제되기 때문에, 억제제 Na2SiO3 300 g/t, 광액 pH 5, 포수제 oleic acid 600 g/t, 기포제 AF65 20 g/t의 순서로 시약을 첨가하여 실험을 수행하였다. 이 실험공정에서 얻어진 조선정광을 대상으로 pH만 조절하여 정선횟수 8회를 거쳐 실험을 실시하여 Sn 품위와 회수율이 각각 55.32%와 77.24%인 정광산물을 얻었다.
Abstract
Froth flotation characteristics study was carried out on Uljin Wangpiri cassiterite ore in order to produce Sn concentrate using oleic acid as collector. In case of using oleic acid, due to the low selectivity of the purpose mineral, the selection of the gangue mineral depressant and pH adjustment are important. As a result, it was confirmed that the optimum pH for providing optimum cassiterite froth flotation characteristics while depressing silicate gauge minerals was in the acidic region. For the reason, rougher flotation was carried out under the sequence of condition of depressant 300 g/t, pH 5 in pulp, collector 600 g/t, frother 20 g/t. With rougher concentrate, cleaner flotation was carried out while controlling only pH in pulp and 8 cleaning times. As a result, final concentrate was obtained Sn grade of 55.32% with a recovery of 77.24%.
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