[英刊《煤炭文摘》报道]澳大利亚昆士兰大学研究了跳汰原理和跳汰机控制问题。该大学还对跳汰理论和跳汰机模型进行了综述。讨论了控制跳汰机的两种主要方法:采用浮子机构或压力系统。本文还研究了俄罗斯的‘自动振动’循环控制方法和德国的方法:采用放射性同位素密度计测量床层平均密度。本文介绍了新型离心跳汰机——Kelsey跳汰机的原理,这种离子跳汰机可用于回收 [British Journal of Coal Digest reports] University of Queensland, Australia studied the jig principle and jig control issues. The university also reviewed jig theory and jig models. Two main methods of controlling the jig are discussed: using a float mechanism or a pressure system. This paper also studies the ’automatic vibration’ cycle control method in Russia and the German method: The average bed density is measured using a radioisotope density meter. This article describes the principle of the new Centrifugal Jig - Kelsey Jig, which can be used for recovery