| 摘要 |
The subject of the invention is a process for separating silicic compounds from baths for cleaning steel substrates containing iron ions and silicic compounds, consisting of the following stages: a) a concentrated spent cleaning bath is cooled in a controlled manner to a temperature below 60 degrees C. so as to precipitate the silicic compounds, b) the cleaning bath is allowed to cool for at least 2 hours, c) the cleaning bath is reheated, d) the silicic compounds precipitated from the cleaning bath are separated off.
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