A Basic Study for the Talc Flotation from Hand Picking Tailings of Dong Yang Talc Mine

동양활석광산의 수선광미로부터 활석부선을 위한 기초연구

In this study, a talc flotation was fundamentally carried out with dolomite origin talc ore produced in Dong Yang Talc Mine at Chung-Ju. This ores are mainly composed with talc as a valuable mineral, dolomite as a gangue mineral and other minor minerals of hornblende, tremolite, actinolite, chlorite, calcite, epidote and iron oxide. In order to obtain some of fundamental data for the talc flotation from low grade dolomitic talc tailings which were abandoned -25mm +17 mm size, after the treatment of crude talc ores by screening and hand -picking at the mine, flotation characteristics of the pure talc and dolomite in this ores were first investigated by measuring floatability of the minerals at some experiment conditions. Furthermore, Several times of batch flotations for talc were performed experimentally to recover talc from the low grade dolomitic talc tailings. From the results obtained in this experiment, the conclusions can be summarized as follows ; 1) In the flotation of pure talc, the use of Dowfroth 250 as frother was the most effective in various kinds of frother and the proper addition amount was about 50 mg/${\ulcorner}$(200g/t) at the condition of this experiment. 2) In the flotation of pure talc, the use of kerosene as collector was not adequate, at the addition over 50mg/l of Dowfroth 250. 3) The adequate pH of pulp ranged from pH6 to pH9 in the talc flotation using Dowfroth 250 as frother. 4) The use of Quebracho as depressant for dolomite was not adequate for the recovery of talc, and more selective depressant was required. 5) In the talc flotation on D sample(dolomitic talc tailing), the suitable number of cleaning time was about 3. 6) At this experimental conditions for the talc flotation on D sample, the talc flotation concentrates of 1. 40% CaO and 84.5 whiteness could be recovered with the talc recovery of about 53%.

본 연구는 충주 동양 골석광산에서 사분 및 수선처리하고 버려지는 저온위의 백운암질 골석정광을 회수할 목적으로, 이 광산에서 산출되는 비교적 순수한 골석과 백운석에 대한 부선특성을 조사하고, 이를 기초로 상기 골석광미 시과에 대한 Batch 부선실험을 행하였다. 그 결과를 요약하면 다음과 같다. 1) 비교적 순수한 골석 부선시에는 여러가지 기포제 중에서 Dowfroth 250을 사용하는 것이 가장 효과적이었으며, 그 사용성은 본 실험조건에서 50mg/l(200g/t)정도이다. 2) 골석 부선시 기포제로서 Dowfroth 250을 사용하는 경과, 적당한 광액의 pH는 pH6~pH9의 범위이다. 3) 저온위의 백운암질 골석광미로 부터 골석을 부선 할 경과 본 실험의 조건 하에서 회수 가능한 골석정광의 품위는 CaO 1,.40%, 백색도 84.5 로서 이때의 실수율은 53% 정도였다.