《一种新的测试起泡剂性能方法(英文期刊)》.pdfVIP

Trans. Nonferrous Met. Soc. China 23(2013) 2776−2780 A new method of testing frother performance Yan-ling GU, Qi-ming FENG, Le-ming OU, Pei-chao LÜ School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China Received 16 July 2012; accepted 5 December 2012 Abstract: A new method of testing frother performance was proposed. Four parameters were tested: maximum foam volume, foam half-life, gas−liquid ratio and mean foam rise velocity. Among them the former two parameters indicate frother’s foaming ability and foam stability respectively, and the latter two indicate water carrying ability and foam viscosity, respectively. The performance of four frothers in a two-phase (solution-air) system was tested and batch flotation tests on a copper ore were carried out. By analyzing frother performance in a two-phase system and comparing with the flotation results, correlation between them was found. Higher-copper concentrate grade was obtained by frothers with weak water carrying ability and low foam viscosity. And frothers with strong foaming ability and stable foam tend to obtain higher copper recovery. Key words: flotation; frother; foam performance; copper ore focus on frothers’ foaming ability and foam stability, but 1 Introduction neglect other important foam properties. Though the modern methods have higher accuracy, limitations also Froth flotation is a separation process widely used exist due to their complicated de