Method for granulating and grinding liquid slag and device for realizing the same
Assignee"Holderbank" Financiere Glarus AG
InventorAlfred Edlinger
Life of this patent
Estimating the term…
Abstract
In a process for granulating and disintegrating molten slags, in particular blast furnace slags, with water, a compressed water jet is directed into the slag and the slag is ejected as the jacket of the compressed water jet. The device for carrying out the process comprises a slag vessel for molten slag including an outlet opening for the molten slag, wherein a lance opens into the axis of the slag outlet opening such that the molten slag is ejected by compressed water or vapor introduced through the lance.
Claims16
A process for granulating and disintegrating slag with water, said process comprising:
- directing a compressed water jet into slag in a vessel and dissolving at least one gas selected from the group consisting of oxygen, air, and oxygen/inert gas mixtures into the slag to quantitatively oxidize iron portions of the slag, the slag in the vessel being in a molten state and the at least one gas being dissolved thereinto;
- and
- discharging the slag and the compressed water jet out of the vessel through a slag outlet, the compressed water jet being discharged at a sufficiently high pressure to generate at the slag outlet a jacket of the discharged slag around the discharged compressed water jet.
A device for granulating slag with water, comprising:
- a slag tundish for accommodating slag in a molten state, said slag tundish comprising an outlet opening for discharging the slag;
- a lance aligned with the outlet open for directing compressed water jet or vapor jet into the slag tundish and causing the slag to discharge from the slag tundish as a jacket around the compressed water jet or vapor jet;
- and
- nozzles for introducing at least one member selected from the group consisting of air, oxygen, and oxygen/inert gas mixtures into the slag tundish, said nozzles being provided at the lowermost site of said slag tundish.
An arrangement for granulating slag with water, comprising:
- a slag tundish for accommodating slag in a molten state, said slag tundish comprising a tubular outlet part with an outlet opening for discharging the slag;
- a lance aligned with the outlet open for directing compressed water jet or vapor jet into the slag tundish and causing the slag to discharge from the slag tundish as a jacket around the compressed water jet or vapor jet;
- nozzles for introducing at least one member selected from the group consisting of air, oxygen, and oxygen/inert gas mixtures into the slag tundish, said nozzles being provided at the lowermost site of said slag tundish;
- an expansion vessel connected to said tubular outlet part;
- and
- a mill comprising a rotor designed as a centrifugal wheel, a baffle plate, or a counterflow nozzle for receiving vapor and/or grinding material coaxially relative to said outlet opening of said expansion vessel.
Dependencies are inferred from the claim text.