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阐述稀酸洗封闭净化流程、运行中的存在问题及解决办法，并与水洗净化流程作一比较，为硫酸工艺设计提供一种新途径。
The process of closed and purifying dilute pickling, the existing problems in operation and its solution are expounded and compared with the washing and purifying process to provide a new way for the design of sulfuric acid process.