Onahama Smelting and Refining CO.,LTD.

Sulfuric Acid , Gypsum
Sulfuric acid is produced at the acid plant. It is produced from
sulfur trioxide that is catalytic converted from sulfur dioxide
in the S furnace and P.S. converters' off-gas.
Sulfur dioxide in the reverberatory furnaces' off-gas is
converted to gypsum by effective lime scrubbing at the
gypsum plant. Furthermore, processed water is sent to the
wastewater treatment section to remove trace metals and adjust the pH.

Acid Plant                Gypsum Plant