Resolution of issues with the lime slurry mixing tank
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In the production of lime slurry in underground channels, coarse particles of calcium oxide or calcium carbonate tend to form at the bottom after a short period of time; these particles increase in number and become harder over time. Manual cleaning is required each time, which is quite troublesome. Do anyone have any good ways to avoid cleaning? We use calcium oxide in the phosphoric acid treatment process, with a pH above 10.
There’s not much that can be done about this, I guess. Both calcium phosphate and calcium hydrogen phosphate have very low solubility. I wonder if phosphoric acid has mixed into your underground channel? If not, it is calcium carbonate that has formed; phosphoric acid can be added periodically to dissolve it. The newly formed precipitates are loose and can be pumped out. Provided that your pump is acid-resistant ； If phosphoric acid is mixed in, that will be problematic.
What are the effects if phosphoric acid gets mixed in?