Ask for help about solid-liquid separation
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The nitric acid type tin stripping solution contains about 15% nitric acid and about 5% tin mud. The viscosity of the tin mud is very high. I tried filtering it with a centrifuge and blocking the filter cloth. The liquid after centrifugation was not clear. The decanter centrifuge needs to be rotated for at least ten minutes to become clear. It's too slow. I've also tried a decanter centrifuge, but the effect is still not ideal and the separation is not complete. Is there any good solution to solve it? Both solid and liquid must be reused, and the components cannot be destroyed. I want to use a filter press, but I have tried many kinds of filter cloths, but none of them are satisfactory.
Try a candle filter, the backflush type
High-speed butterfly centrifuge can be tried
Try the GKH horizontal scraper siphon centrifuge
Try using diatomaceous earth as a filter layer in a drum centrifuge
Ultrafiltration membrane filter, this filter works well when used in wet phosphoric acid. The originally designed plate and frame filter press had a problem with phosphogypsum. After the phosphogypsum changed during the production process, the plate and frame were completely blocked. After the filter was changed, the discharged slurry looked like melted chocolate, with a high viscosity, and the acid liquid that came out was completely clear.