Abstract: Blast furnace plant (1) and shutdown process for such a blast furnace plant (1). The blast furnace plant comprises a blast furnace (2) and a gas cleaning section (6) for cleaning gas from the blast furnace. Clean gas is released via a clean gas vent line (11) downstream of the gas cleaning section.

Abstract: A delivery device for delivering filler material into a blast furnace, comprising: a housing provided with a transition channel for the filler material which defines a first axis X; a chute for the filler material arranged underneath said transition channel; first actuating means, defining a respective second axis A parallel to the first axis X, to actuate a tilt of the chute with respect to the first axis X; second actuating means, defining a respective third axis B parallel to the first axis X, to actuate a rotation of the chute about said first axis X; a first annular body inside said housing and coaxial to the first axis X, adapted to translate along the first axis X by means of said first actuating means; a second annular body inside said housing and coaxial to said first axis X, adapted to translate along the first axis X being coupled to the first annular body and/or adapted to rotate about the first axis X by means of said second actuating means; a mechanism coupled to the second annular body and t

Abstract: A delivery device for delivering filler material into a blast furnace, comprising: a housing provided with a transition channel for the filler material which defines a first axis X; a chute for the filler material arranged underneath said transition channel; first actuating means, defining a respective second axis A parallel to the first axis X, to actuate a tilt of the chute with respect to the first axis X; second actuating means, defining a respective third axis B parallel to the first axis X, to actuate a rotation of the chute about said first axis X; a first annular body inside said housing and coaxial to the first axis X, adapted to translate along the first axis X by means of said first actuating means; a second annular body inside said housing and coaxial to said first axis X, adapted to translate along the first axis X being coupled to the first annular body and/or adapted to rotate about the first axis X by means of said second actuating means; a mechanism coupled to the second annular body and t

Abstract: A hot blast stove dome comprises a first dome portion adapted for support on a combustion chamber wall of a hot blast stove, and a second dome portion adapted for support on a checker chamber wall of a hot blast stove, wherein a vertical expansion joint is provided between the first dome portion and the second dome portion and is adapted to allow the first dome portion and the second dome portion to independently accommodate vertical expansion of their respective supporting walls. The dome is suitably provided in a hot blast stove which comprises a combustion chamber, a checker chamber, a cylindrical housing comprising a combustion chamber wall and a checker chamber wall.

Abstract: A hot blast stove dome comprises a first dome portion adapted for support on a combustion chamber wall of a hot blast stove, and a second dome portion adapted for support on a checker chamber wall of a hot blast stove, wherein a vertical expansion joint is provided between the first dome portion and the second dome portion and is adapted to allow the first dome portion and the second dome portion to independently accommodate vertical expansion of their respective supporting walls. The dome is suitably provided in a hot blast stove which comprises a combustion chamber, a checker chamber, a cylindrical housing comprising a combustion chamber wall and a checker chamber wall.

Abstract: Support assembly for supporting heat regeneration checker work in a hot blast stove for a blast furnace. The assembly includes a supporting grid for supporting the checker work, and supporting columns for supporting the supporting grid. The assembly includes a cast iron material. The cast iron material includes a ferritic matrix and a dispersion of graphite particles wherein the shape of the graphite particles is substantially vermicular or nodular.

Abstract: A wall structure for a metallurgical vessel at the location where the vessel wall, on the hot side, is in contact with liquid metal and/or liquid slag, in particular for the hearth of a shaft furnace, comprising a steel plate lining (2), inside which lining at least one layer of refractory brickwork (15, 16, 17) is arranged, the steel plate lining (2) being joined to the layer (layers) of brickwork by means of mortar joints (5) and/or ramming compound joints (5) to form a cohesive structure, wherein metal bars (11) which run in the circumferential direction inside the steel plate lining (2) and project into the wall are present, which bars are connected to the outer side of the steel plate lining by means of attachment means (20) running through the steel plate lining, each assembly comprising a metal bar (11) and its attachment means (20) and the steel plate lining (2) forming, in the vertical direction, a unit which is sufficiently elastic to maintain a surface-to-surface contact along horizontal surfaces b

Abstract: Refractory wall structure for a blast furnace, in particular for a metallurgical furnace, such as for example a blast furnace with a high process temperature during operation, which wall structure is subjected to a high thermal loading. The wall structure comprises a steel outer wall, a refractory lining consisting of one or more layers of a well heat-conducting material on the inside of the outer wall, and a cooler for cooling the refractory wall structure, whereby the wall structure also comprises a permanent, well heat-conducting metallic filling in a gap in the refractory wall structure, which filling has been molten inside the gap and then after solidifying forms a low heat resistance across the gap.

Abstract: Refractory wall structure, suitable in particular for use in a metallurgical vessel for a continuous production of crude iron in a smelting reduction process under conditions of an extremely high thermal load in a highly abrasive environment of molten slag with a high FeO content, comprising, going from the outside to the inside, (1) a steel jacket; (2) a water-cooled copper wall; (3) water-cooled copper ledges extending towards the inside; (4) a lining of refractory material resting on the ledges.

Abstract: Runner for guiding a flow of liquid metal and/or slag, comprising a refractory permanent lining and, inside the latter, a refractory wear lining, in which runner the permanent lining is arranged inside an elongate trough-like steel casing, in which parallel runner ducts through which a gaseous cooling medium is passed run through this permanent lining divided along the circumference and in the vicinity of the bottom and the walls of the steel casing, and in which the wearing and the permanent lining are separated from one another by a deformable layer which is made from the group of materials comprising dry refractory ramming mixture and refractory felt.

Abstract: Runner for conveying a hot melt, for example molten pig iron and slag, comprising a wear lining in which the melt flows during normal operation, a safety lining which surrounds the wear lining and a metal encasing which surrounds the safety lining, wherein the safety lining is made essentially of a refractory concrete, and the metal encasing and the safety lining are joined to one another by anchoring means, and wherein a means for keeping the encasing at a higher temperature where it would otherwise have a relatively cool spot is situated locally on the outwardly facing side of the encasing.

Abstract: A ceramic burner for a hot blast stove has a central gas duct that opens into the central zone of a burner crown and side air ducts on both sides of the gas duct which also open into the central zone. To improve combustion characteristics, there is a central air duct in the gas duct opening out within it. Air is supplied to the central air duct in an upward flow which exits in two opposing directions through side openings.

Abstract: In the construction of a hot blast stove, walls are made of pre-formed and baked bricks. At the joint between two walls, cast joining elements of complex shape are incorporated. The cast joining elements may be cast in situ. This avoids the need for pressing joining bricks of a variety of shapes.

Abstract: To diminish cracking due to differential expansion of refractory channels conducting molten materials, e.g. in an iron runner or iron trough, lateral pressure is exerted inwardly on the wear lining of such a channel through intermediate layers of permanent lining. These may include low friction slide plates and at least one layer having a high thermal conductivity. The means exerting the pressure react against an external frame structure and are preferably such that the pressure exerted is independent of the degree of expansion of the channel.

Abstract: An iron runner for tapping molten crude iron from a blast furnace is proposed, comprising at least a wear lining which forms a boundary carrying the iron during operation and a permanent lining in which the wear lining is contained, an outer boundary and at least an outer lining with a high coefficient of thermal conductivity which is provided between the outer boundary and the permanent lining, wherein the outer lining is provided with a thickening in the direction of the wear lining, which thickening is applied at the level of the inerface-layer being present during operation between the iron being carried through the runner and a slag layer floating on the iron.

Abstract: A channel structure, i.e. iron trough or iron runner, for flow of molten pig iron during tapping of a blast furnace, comprises a wear lining which provides the surface along which the iron flows, a permanent lining outside the wear lining and an outer lining of high thermal conductivity outside the permanent lining. The outer lining has a bottom wall and two opposed side walls thermally connected at their lower ends to the bottom wall. To improve resistance to thermal stress, outside and adjoining at least one, but not all, of the walls of the outer lining, there is at least one refractory insulating lining layer, and the other or others of the walls of the outer lining are thermally coupled to heat dissipating means.

Abstract: A bottom construction for a shaft furnace, has a plurality of horizontal layers of refractory material, and a gastight metal membrane located above at least the lowest layer of refractory material. So that the membrane is easily constructed, can accommodate thermal movements and has a level upper surface, the layer of refractory material immediately underneath the metal membrane is formed of blocks and has a level top surface and the metal membrane is formed of loosely laid, mutually abutting metal plates which are stacked in at least three layers. The pattern of the joints of the plates of each of these three layers is offset, as seen in plan view, with respect to the pattern of the joints of both the other two layers. The plates may be copper sheets. The membrane may have a peripheral flange cemented in a slot at the furnace wall.

Abstract: A coke oven battery has a refractory brick structure comprising a row of coking chambers (1) between an oven roof (9) and a regenerator roof (10) and a row of regenerative chambers (2) between the regenerator roof (10) and a regenerator floor (11). In order to provide protection (e.g. for an external steel frame) against leakage of inflammable gas, cladding (16-24) of metal foil is provided at both the pusher side and the coke side. This cladding makes a substantially gas tight seal with the refractory brick. The foil preferably has a thickness of 0.05 to 0.25 mm.

Abstract: In a shaft furnace having a metal shell, a refractory lining of relatively high thermal conductivity and cooling bodies which project inwardly through the shell into the lining and through which in operation cooling liquid flows, has a high uniformity of temperature in the lining. In order to improve its operational characteristics, in particular to improve temperature uniformity yet further while reducing heat loss, the shell and the cooling bodies are screened from the lining. Between the cooling bodies and the refractory lining and between the shell and the refractory lining there are respectively first and second thin layers of refractory material having in each case a .lambda.-value of less than 5 kcal/mh .degree.C., preferably less than 1.5 kcal/mh .degree.C. The thin layers may be of refractory felt or refractory plates.

Abstract: In a shaft furnace having a metal shell, a refractory furnace lining inside the shell and a taphole construction comprising a drilled taphole extending through a plug located in an aperture in the shell and a taphole brick structure forming part of said furnace lining, the taphole brick structure at least partly consists of at least one taphole brick of high thermal conductivity material selected from the group comprising graphite, semi-graphite and material of equivalent heat conductivity, there further being screening means comprising material of substantially lower heat conductivity coefficient than graphite and semi-graphite located between said taphole brick and said furnace shell.