Furnace charging installation
AssigneePaul Wurth S.A.
InventorsEdouard Legille, Pierre Mailliet, Emile Lonardi
Life of this patent
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Abstract
The delivery of charge material to the hearth of a pressurized blast furnace under the influence of gravity is accomplished without the necessity of changing the direction of material flow at a point exterior of the furnace. The rate of flow of the charge material, which moves in a vertical stream, is controlled by a metering device including a pair of overlapping register elements which define a variable size aperture which remains generally symmetrical with respect to the stream axis.
Claims21
A charging installation for a pressurized furnace, the furnace having an axis and an internal distributor which has its receiving end aligned with the said axis, the furnace further having a charge material supply opening which is coaxial with said axis, said charging installation comprising:
- an intermediate charge material storage vessel, said vessel having an axis, said vessel further having a discharge opening at its lower end and a loading opening in its upper end, said discharge opening being coaxial with said vessel;
- means supporting said vessel above and coaxially with the furnace;
- and
- means for coupling said vessel discharge opening to the furnace to selectively establish a flow of charge material from the said vessel to the receiving end of the furnace distributor, said coupling means including flow control means, said flow control means defining a variable area orifice which is generally symmetrical with respect to a prolongation of the furnace axis, said flow control means comprising:
- a pair of registers, said registers each having the shape of a segment of a sphere, said registers each also being provided with a cut-out extending inwardly from an edge thereof;
- means supporting said registers for rotation about a common axis;
- and
- means for simultaneously imparting rotation in opposite directions about said axis to said registers whereby said cut-out portions of said registers may be placed in registration, said registered cut-out portions of said registers defining said variable area orifice;
- said means supporting said registers for rotation comprising:
- a common support shaft positioned to one side of a prolongation of said vessel discharge opening;
- and
- a pair of coaxial, rotatable support shafts positioned at the opposite side of said vessel discharge opening prolongation with respect to said common shaft, said coaxial shafts being coupled to respective of said registers and being rotatable relative to one another, said common and coaxial support shafts defining said common axis.
Dependencies are inferred from the claim text.