70. What methods can be used to reduce the generation of zinc ash?

(1) Add aluminum appropriately in the galvanized pot; (2) Reduce the contact area between the molten zinc surface and air by using a small-diameter galvanized pot; (3) Lower the molten zinc temperature to maintain it at the lower limit of the process temperature; (4) Avoid using high-volume dust removal equipment on the molten zinc surface; (5) Employ the "protective gas reduction method" to isolate most of the molten zinc surface from air; (6) Cover the molten zinc surface with a layer of activated carbon treated with boric acid, or a mixture of diatomaceous earth and aluminum oxide; (7) Ensure the solvent on the steel pipe is dried.