This paper describes an imperfect pulse injection stimulus-response technique to study the axial mixing in the extraction column.

本文以非理想脉冲注入的扰动-响应技术，进行萃取柱轴向混合的研究。

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Now there are some problems such as unsuitable recovering location, insufficient recovering quantity, imperfect ore-coke nut mixing method and so on.

我国目前存在着焦丁回收地点不当、回收量不足及焦丁与矿石混匀方法不完善等方面的问题。

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