Sulfuric Acid and Ferrous Sulphate Recovery from Waste ...
This process recovers ferrous sulfate heptahydrate as a nearly dry solid by-product and recovers the unreacted acid for recycle to the pickling tank thus eliminating the discharge of spent pickle liquor and rinse water. ... and the pickling tank is heated by a heat exchanger. ... Prices for ferrous sulfate vary considerably based on quality ...
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