Back to results
US 2019/0177815 A1Published application
Method for the Treatment of Iron-Containing Sludge
AssigneeArcelorMittal
InventorSeverine Giordana
Life of this patent
Estimating the term…
Abstract
The present invention provides a method for the treatment of sludge containing iron and between 4.5% to 12% by weight of zinc. This method includes a leaching step wherein leaching agents include hydrochloric acid and chlorate, and wherein the pH of the leachate directly resulting from this leaching step is set at a value below 1.5. A recycling method and treatment installation are also provided.
Claims20
1-17. (canceled)
A method for the treatment of sludge containing iron and between 4.5% to 12% by weight of zinc, the method comprising the step of:
- leaching with leaching agents including hydrochloric acid and chlorate, a pH of leachate directly resulting from this leaching step being 1.5 or less.
Dependencies are inferred from the claim text.