Sulfur melting tank debris
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There are black floating particles on the surface of the liquid sulfur in the sulfur melting tank; in severe cases, a layer of black, scaly solid material forms on the surface of the liquid sulfur. What kind of impurities are these, and how should they be removed?
The purity of sulfur is insufficient, and the ash content is too high. We have also used this kind of sulfur; we have also removed the scum
The raw material is impure; it might be asphalt.
It’s normal for sulfur to be cheap but contain high levels of impurities these days; the most common method is manual salvage
The black substances are impurities; they can be removed by using a filter.