Evaluation of circuits in Canadian practice based on surveys in 1957 and 2020 was used to identify the common types and whether there was any change over time. Three-stage circuits were considered along with a measure of circuit separation efficiency. The rougher-scavenger-cleaner and rougher-cleaner-cleaner still dominate, together comprising over 60% usage. Correlation against circuit separation efficiency offered one reason with other factors also discussed. The 2020 survey showed increased use of the rougher-cleaner-cleaner/scavenger (R-C-CS) circuit with CS tail discarded attributed to a benefit to process control through isolation of rougher and cleaner bloc chemistries. A variation placing CS on a second stage cleaner rather the normal location on the first cleaner was analysed with possible advantages outlined.

中文翻译：

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加拿大实践中电路随时间的比较

根据 1957 年和 2020 年的调查对加拿大实践中的电路进行评估，以确定常见类型以及是否随时间发生变化。考虑了三级电路以及电路分离效率的测量。粗加工-清除-清洁工和粗加工-清洁工-清洁工仍然占主导地位，合计使用率超过 60%。与电路分离效率的相关性提供了一个原因，还讨论了其他因素。 2020 年的调查显示，粗选机-清洗机-清洗机/清除机 (RC-CS) 回路的使用量有所增加，其中废弃 CS 尾部，这是由于通过隔离粗选机和清洗机集团化学物质有利于过程控制。分析了将 CS 放置在第二级清洁器上而不是第一级清洁器上的正常位置的变化，并概述了可能的优点。