Process and installation for granulating slag
AssigneeVoest-Alpine Industrieanlagenbau GmbH
InventorBogdan Vuletic
Life of this patent
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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.
Claims12
A process for granulating slag from a blast furnace or a smelting reduction plant, comprising:
- feeding a granule/water mixture that was formed during granulation and combustion flue gas including H2S-containing vapors to a granulation tank and then to a dewatering installation, and dewatering the granules in the dewatering installation;
- at least partially condensing the H2S-containing vapors and gases formed during the granulation by injecting water in a condensation space which is flow-connected to the granulation tank, the water injection being at a water injection point;
- discharging H2S-containing residual gases from the condensation space below the water injection point, and burning H2S from the condensation space;
- and
- after the residual gases have been discharged from the condensation space, passing the residual gases through a hot slag channel in countercurrent to a flow direction of hot slag therethrough, thereby burning H2S to form SO2.
Dependencies are inferred from the claim text.