광물찌꺼기로부터 비소 제거에 관한 물리 및 물리화학적 선별 연구

Abstract

The tailings contain various types of heavy metals that are found in soil and groundwater around the stockyard in the mine waste and contaminated environment, which recently has emerged as a serious environmental problem. It also has been identified that the pollution due to various heavy metals was a significant economic mineral resource losses, so it requires eco-friendly circulating and recycling technology to solve this problem, proactively removing the heavy metals and impurities in order to recycle tailings. Therefore, the purpose of the present study is to conduct a series of experiments using flotation in order to remove As from the tailings placed in the waste a stockyard of the Sangdong Mine. Thus, this study attempts to identify the removal efficiency of heavy metal "As" contained in tailing through physical and physicochemical processing. As a result of MGS, using pulp density 30 %, feed rate 265.24 g/min., slope 3°and wash water 6 l/min., As removal 88.21 % and yield 92.25 % were obtained. and a result of batch flotation, using pulp density of 20 %, collector KAX 200 g/ton, frother AF65 500 ml/ton and depressant citric acid 100 g/ton, the As removal 87.55 %, yield 94.57 % were shown. Using CPT column flotation, the result was As removal 96.50 %. and yield 96.80 % based on the condition of pulp density 3 %, collector KAX 200 g/ton, frother AF65 10 l/ton, depressant citric acid 100 g/ton, sulfidizing agent Na2S⦁9H2O 500 ml/ton, wash water(360 ml/min.) and air flow rate(1200 ml/min.).