Method for the treatment of iron-containing sludge
AssigneeArcelorMittal
InventorsGaelle Kerzerho, Helene Boucard, Ana-Maria Iosif
Life of this patent
Estimating the term…
Abstract
A method for the treatment of sludge containing iron, the method including a leaching step wherein the sludge containing iron is mixed with an acid and an oxidation agent so as to create an oxidized leachate, and a step of precipitation of iron wherein the oxidized leachate is mixed with a neutralizing agent so as to create a mixture composed of a solid part including precipitated iron and of a liquid part, the neutralizing agent including at least 30% in weight of dust recovered from a bag filter treatment of ironmaking, steelmaking, coke making or sintering gas.
Claims18
A method for the treatment of sludge containing iron, the method comprising:
- leaching the sludge containing iron by mixing the sludge containing iron with an acid and an oxidation agent so as to create an oxidized leachate;
- and
- precipitating the iron by mixing the oxidized leachate with a neutralizing agent so as to create a mixture composed of a solid part including precipitated iron and a liquid part, the neutralizing agent including at least 30% in weight of dust recovered from a bag filter treatment of sintering gas.
Dependencies are inferred from the claim text.