Process and installation for granulating slag
AssigneeSiemens Vai Metals Technologies GmbH
InventorBogdan Vuletic
Life of this patent
Estimating the term…
Abstract
In a process for granulating slag, from a blast furnace or a smelting reduction plant, in which a granule/water mixture formed during the granulation is fed to a granulation tank and then to a dewatering installation, in which the slag granules are dewatered. H2S-containing vapors and gases formed during the granulation are at least partially condensed by injection of water in a condensation space which is flow-connected to the granulation tank. H2S-containing residual gases are discharged from the compensation space below the water injection point, H2S is burnt.
Claims8
An installation for granulating slag from a blast furnace or a smelting reduction plant, the installation comprising:
- a granulation device configured to granulate the slag;
- a slag channel configured to deliver the slag to the granulation device;
- an extractor hood positioned over the slag channel and configured to discharge flue gas;
- a downstream granulation tank positioned downstream from the granulation device in a slag movement direction and configured to hold a granule/water mixture;
- a condensation device flow connected to the granulation tank and including a water feed and a device configured to inject water into the condensation device;
- and
- a discharge line leading from the condensation device and configured to discharge vapors and gases containing H2S, the discharge line opening out into the slag channel at a first point between the granulation device and the extractor hood,
- wherein the first point is positioned at a first distance from the extractor hood, and the slag channel is configured to pass the vapors and gases in a direction counter to the direction of the slag flow so as to heat and combust H2S in the vapors and gases.
Dependencies are inferred from the claim text.