Is the yield of sulfur trioxide produced from pyrite higher or that from copper smelting?
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Is the generation rate of sulfur trioxide higher in the production of acid from pyrite, or is it higher in copper smelting? In copper smelting, the incidence of sulfur trioxide generally reaches 0.3%, and the acidity of the purified dilute acid is 130–200 g/L (of course, this acidity level varies depending on the amount of water added for purification). What about pyrite?
The last edit to this post was made by mkp369 on 2019-5-14 at 10:01, and it also relates to the issue of control: if the residual oxygen level in the flue gas exiting the boiling furnace is kept low, the SO3 content in the furnace gas will decrease accordingly. Controlling SO3 in the furnace gas and controlling sublimed sulfur are contradictory to each other, placing high demands on the plant’s material mixing and air supply control.
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