Method and apparatus for recovering valuable metals from slag and manufacturing multifunctional aggregate
AssigneeHyundai Steel Company
InventorsJoonseong Ki, Jinill Hwang
Life of this patent
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Abstract
Disclosed is a method and apparatus for recovering valuable metals from slag and manufacturing multifunctional aggregate, wherein a reducing agent is fed into molten slag discharged into a slag pot or a slag reforming pot from a converter or an electric arc furnace thus recovering valuable metals from the molten slag, and then the molten slag is formed into a lightweight porous structure. Accordingly, the valuable metals (Fe, Mn) are recovered from the slag discharged from the converter or electric arc furnace, and slag having low specific gravity is ensured using foaming and controlled cooling and then formed into multifunctional aggregate.
Claims13
A method of making particles of slag, the method comprising:
- providing molten slag in a container;
- adding an inoculating agent to the molten slag to lower the melting point and specific gravity of the slag
- subsequently to adding the inoculating agent, injecting steam into the molten slag to cool the molten slag and further injecting another gas into the molten slag to form bubbles in the molten slag, thereby forming porous solidified slag;
- and
- breaking the porous solidified slag into particles of slag.
A method of making particles of slag, the method comprising:
- providing molten slag in a container;
- exposing the molten slag to a reducing agent to recover a metal from the molten slag;
- subsequently to exposing the molten slag to the reducing agent, injecting steam into the molten slag to cool the molten slag and further injecting another gas into the molten slag to form bubbles in the molten slag, thereby forming porous solidified slag;
- and
- breaking the porous solidified slag into particles of slag,
- wherein exposing and cooling of the molten slag are performed in the same container.
A method of making particles of slag, the method comprising:
- providing molten slag in a container;
- exposing the molten slag to a reducing agent to recover a metal from the molten slag;
- subsequently to exposing the molten slag to the reducing agent, injecting steam into the molten slag to cool the molten slag and further injecting another gas into the molten slag to form bubbles in the molten slag, thereby forming porous solidified slag;
- and
- breaking the porous solidified slag into particles of slag,
- wherein the container comprises a porous plug, wherein the steam or the gas is introduced into the container through the porous plug.
Dependencies are inferred from the claim text.