Vessel for containing direct reduced iron
AssigneesDanieli & C. Officine Meccaniche SpA, Hyl Technologies, S.A. De C.V.
InventorsAngelico Della Negra, Federico Freschi, Massimiliano Zampa, Maria Teresa Guerra Reyes
Life of this patent
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Abstract
A vessel for containing direct reduced iron (DRI), such as a reactor for the production of DRI, a bin or a hopper or other container for storing or feeding DRI to melting furnaces or briquetting machines, includes at least an upper zone, defined by a first lateral wall having a substantially cylindrical tubular shape, and a discharge zone, positioned below the upper zone and defined by a second lateral wall having a substantially truncated cone shape converging toward a lower discharge aperture. The second lateral wall has an internal surface at least partly lined by an internal lining.
Claims10
A vessel for containing direct reduced iron (DRI), comprising at least an upper zone (11), defined by a first lateral wall (13) having a substantially cylindrical tubular shape, and a discharge zone (12), positioned below said upper zone (11) and defined by a second lateral wall (16) having a substantially truncated cone shape converging toward a lower discharge aperture (15),
- said second lateral wall (16) having an internal surface at least partly lined by an internal lining (22),
- wherein said internal lining (22) comprises
- at least a first layer (23) made of tiles or blocks (26) having a minimum thickness of 40 mm, of a composite ceramic material comprising a mixture of alumina, in the form of corundum (Al2O3), zircon oxide (zirconia—ZrO2) and silica (SiO2),
- said first layer of the internal lining (22) having a surface with a surface hardness greater than or equal to 8.5 on the Mohs scale so as to reduce the friction coefficient of said second lateral wall (16) and increase the ability of said DRI to slide toward said discharge aperture (15),
- wherein said first layer (23) has a density comprised between 3,000 kg/m3 and 4,000 kg/m3 and a conductivity comprised between 3.5 W/mK and 5.0 W/mK,
- wherein said ceramic material comprises at least a quantity of corundum (Al2O3) comprised between 40% and 60% in weight,
- wherein said ceramic material comprises at least a quantity of zircon oxide (ZrO2) comprised between 25% and 40% in weight, and
- wherein said ceramic material comprises at least a quantity of silica (SiO2) comprised between 10% and 20%.
Dependencies are inferred from the claim text.