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众所周知 ,选矿中浮选机类型及其性能对于泡沫浮选的成功应用至关重要。从 2 0世纪初开始 ,人们就发明了并正在设计各种类型的浮选机 ,试图提高浮选效率。机械搅拌式浮选机一直在生产应用中拥有绝对的优势地位。然而 ,近年来人们对充气式浮选机的兴趣渐浓 ,因为大家公认这种浮选机结构简单、价格低廉、处理量大并具备良好的浮选指标。本文对充气式浮选机处理磁铁矿的效果作出了评估。试验采用实验室型充气式浮选机 ,它利用一个适当规格的喷嘴产生气泡。试验并优化了许多重要参数 ,其中包括喷嘴大小、空气流量和泡沫层厚度。还做了进一步的试验 ,以确定起泡剂用量的影响 ,并探讨了通过精选和扫选来提高精矿品位及回收率的可能性。在最佳试验条件下 ,最终得到了铁品位66 4% ,回收率 97 7%的铁精矿 ,尤其是其回收率比机械搅拌式浮选机的回收率要高 ,主要是因为充气式浮选机能产生并维持较厚的泡沫层。
It is well known that the type and performance of flotation machines in beneficiation are crucial to the successful application of froth flotation. Since the beginning of the 20th century, people have invented and are designing various types of flotation machines in an effort to improve flotation efficiency. Mechanical agitation flotation machines have always had an absolute advantage in production applications. However, there has been a growing interest in inflatable flotation machines in recent years as it is widely acknowledged that the flotation machines are simple in structure, low in cost, large in throughput and good in flotation index. This article evaluates the effectiveness of inflatable flotation machines for processing magnetite. The experiment uses a laboratory-type inflatable flotation machine that uses a properly sized nozzle to create air bubbles. A number of important parameters were tested and optimized, including nozzle size, air flow and foam layer thickness. Further tests were also conducted to determine the effect of foamer dosage and to explore the possibility of improving concentrate grade and recovery by selection and sweep. Under the optimal experimental conditions, the final iron concentrate with an iron grade of 66 4% and a recovery rate of 97.7% was obtained. In particular, the recovery rate was higher than that of the mechanical agitation flotation machine, mainly because of the inflatable floatation Election machines produce and maintain thicker foam layers.