摘要:
A coke oven offtake piping system including a pipe assembly for conveying coke oven gases from a coke oven to a collecting main, at least one spraying nozzle in pipe assembly, and a discharge section with a discharge pipe having a discharge orifice, where a gate member cooperates with the discharge orifice and is movable along the discharge orifice in order to present a closing surface to the extremity thereof, whereby the opening area of said discharge orifice can be varied for controlling the flow rate to the collecting main.
摘要:
A charging device (10; 10′; 10″) for a shaft furnace comprises a distribution chute (20; 20′; 20″; 20′″), which is supported rotatable about an essentially vertical axis of rotation (A), and a variable-speed drive (26) connected to the distribution chute. The variable-speed drive is configured to rotate the distribution chute for circumferential distribution of bulk material on a charging surface of the shaft furnace. According to the invention, the distribution chute comprises multiple chute sections (32, 34, 36, 38) that are interlinked by articulations so as to be capable of forming a curved channel for radial distribution of bulk material on the charging surface, the degree of curvature of said channel being variable in function of the speed of rotation (ω) of the distribution chute.
摘要:
A three hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the furnace by rotating a distribution member about the furnace central axis and a first, a second and a third hopper arranged in parallel above the rotary distribution device and offset from the central axis. A sealing valve housing is arranged between the hoppers and the distribution device. It has a top part with a first, a second and a third inlet respectively communicating with the first, the second and the third hopper. A first, a second and a third sealing valve are provided in the top part. Each sealing valve includes a flap which is pivotable between a closed sealing position and an open parking position. The sealing valve housing also has a funnel shaped bottom part with an outlet communicating with the distribution device. According to the invention, the top part of the sealing valve housing has a tripartite stellate configuration in horizontal section with a central portion, in which the inlets are arranged adjacently in triangular relationship about the central axis, and with a first, a second and a third extension portion, each sealing valve being adapted such that its flap opens outwardly with respect to the central axis by pivoting into a parking position located in the first, second or third extension portion respectively.
摘要:
A rotary charging device for a shaft furnace, in particular a blast furnace, is disclosed. The charging device is equipped with a cooling system. The rotary charging device includes a rotatable support for rotary distribution means as well as a stationary housing for the rotatable support. The cooling system includes a rotary cooling circuit fixed in rotation with the rotatable support as well as a stationary cooling circuit on the stationary housing. A heat transfer device is provided which includes a stationary heat transfer element configured to be cooled by a cooling fluid flowing through the stationary cooling circuit and which includes a rotary heat transfer element configured to be heated by a separate cooling fluid circulated in the rotary cooling circuit. These heat transfer elements are arranged in facing relationship and have there between a heat transfer region for achieving heat transfer by convection and/or radiation through the heat transfer region without mixing of the separate cooling fluids of the rotary and stationary cooling circuits.
摘要:
A continuous casting mould comprises a mould tube (12), a mould jacket (24) surrounding the mould tube (12), a cooling system (26) within the mould jacket (24) for cooling the mould tube (12), an oscillating lever (40) supporting the mould tube (12). The oscillating lever (40) is capable of oscillating about a pivoting axis (45) substantially perpendicular to a casting plane containing the casting axis (20) for transmitting mechanical oscillations to the mould tube (12). An oscillating mould cover (30) associated with the top end of the mould jacket (24). The mould tube (12) is supported with its upper end by the oscillating mould cover (30), and is itself pivotably supported by the oscillating lever (40) outside of the mould jacket (24). A sealing element, e.g. an annular lip seal (90), provides sealing between the oscillating mould cover (30) and the top end of the mould jacket (24).
摘要:
A device for distributing bulk materials includes a suspension rotor is mounted in a support frame which is capable of rotating about a substantially vertical axis of rotation. A chute is suspended to the suspension rotor and is tiltable about a substantially horizontal tilt axis. A first motor is capable of rotating the suspension rotor about its axis of rotation in a first direction, and a tilt controlling motor mounted in the support frame is capable of rotating about a substantially vertical axis of rotation. A tilting mechanism is also connected between the chute and the tilt controlling rotor, while a first braking device exerts a braking moment on the tilt controlling motor. A first control device controls the angle of inclination of the chute by controlled braking of the tilt controlling rotor.
摘要:
A method of operating a multiple hearth furnace with a plurality of vertically aligned hearth floors includes feeding a first material onto the uppermost hearth floor and moving it over the hearth floor before it falls through a drop hole onto the next lower hearth floor. The first material is processed in this way from hearth floor to hearth floor to the lowermost hearth floor. A second material is fed onto one of the hearth floors to be mixed into the first material. This second material is moved separately from the first material in a separate annular zone of the hearth floor onto which it is fed before it is mixed into the first material, providing an efficient thermal preconditioning of the second material prior to mixing it with the first material without requiring any supplemental equipment.
摘要:
The preliminary cleaning stage for a dust extraction installation for blast furnace gas is comprised of a large-sized cyclone which comprises a vertical pressurized tank. A gas furnace gas line arriving from the blast furnace is connected to an axial delivery device situated at the upper end of the pressurized tank. The delivery device is configured such that it introduces the blast furnace gas into the pressurized tank in an axial direction. A swirl device with guide vanes is positioned below the axial delivery device and causes the blast furnace gas which is axially introduced into the pressurized tank to swirl about the axis of the pressurized tank.
摘要:
A device for the discharge of bulk material (96) from a pressure vessel (2) is proposed, which comprises at least one sluice bin (24, 26) with a bottom (42, 44) and a top (40) sluice gate. The sluice bin (24, 26) is arranged under a plate (76, 76'), into which it forms an orifice (28, 30) for the bulk material (96). The top sluice gate (40) has a sealing plate (66), which is arranged above this plate (76, 76') in such a way that it can be positioned above the orifice (28, 30) of the sluice bin (24, 26) and, after a sealing connection to the edge of the orifice (28, 30) has been made, can be forced against this edge by overpressure in the pressure vessel (2).
摘要:
A suspension device for a heavy body, such as a rotating hopper for a shaft furnace, is presented. The suspension device has an annular running surface, a number (n) of rollers greater than three, and an elastically compressible component to permit elastic deformations sufficient substantially to correct an unequal distribution of weight of the heavy body over the rollers resulting from slight defects in the coplanarity of the rollers.