摘要:
The invention relates to a distribution chute (100) for a charging device of the rotary pivotal type, e.g. for a shaft furnace. The chute has an upstream mounting head (114) and a chute body (112) having an elongated downstream chute portion (116) with a longitudinal axis (L). It further includes at least two lateral suspensions (130) at the mounting head for mounting the chute to at least two corresponding support flanges of the charging device, the support flanges (140) being pivotable about the pivoting axis (B) in a raising sense (R) for raising the outlet (120) to a radially outer-most charging position and in an opposite lowering sense for lowering the outlet to a radially innermost charging position with respect to the rotational axis. The suspensions (130) define a first and a second tilt points, which define, in turn, a tilt axis (T), about which the weight of the chute exerts torque onto support flanges of the charging device when the chute is mounted. The suspensions are configured in such a way that the ratio of the distance between the tilt axis and the pivoting axis to the distance between the first and second tilt points (which corresponds at least approximatively to the distance between the suspensions) amounts to 0.25 at most. According to the invention, the suspensions (130, 230, 330) are arranged so that an acute angle (a) from the longitudinal axis (L) to a virtual plane (P) through the tilt axis (T) and the center of gravity (G) of the chute has an angular measure in the raising sense (R) that has a small positive or a negligibly negative value.
摘要:
A distribution chute for a charging device, a charging device having the same, and a methods for mounting and dismounting such chute, the chute including an upstream mounting head and a chute body, at least two lateral suspensions on the mounting head for mounting the chute to two corresponding support flanges pivotable about a pivoting axis for raising an outlet to a charging position and for lowering the outlet to a charging position, where the suspensions define a first and a second tilt point about which a weight of the chute exerts torque onto the support flanges of the charging device when the chute is mounted to the charging device, where the ratio of the distance between each of the tilt points and the pivoting axis to the distance between the first and second tilt points amounts to 0.25 at most, the suspensions being arranged so that an oriented acute angle from the longitudinal axis to a plane through the tilt points and the center of gravity has an angular measure in the range from −5° to 15°.
摘要:
A multiple hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the shaft furnace by rotating a distribution member about a central axis of the shaft furnace and at least two hoppers arranged in parallel and offset from the central axis above the rotary distribution device. Each hopper has a lower funnel part ending in an outlet portion and each hopper has a material gate valve with a shutter member associated to its outlet portion. According to the invention, each funnel part is configured asymmetrically with its outlet portion being eccentric and arranged proximate to the central axis, each outlet portion is oriented vertically so as to produce a substantially vertical outflow of bulk material and each material gate valve has a one-piece shutter member and is configured with its respective shutter member opening in a direction pointing away from the central axis such that any partial valve opening area is located on the side of the associated outlet portion proximate to the central axis.
摘要:
The present invention proposes a charge distribution apparatus for a furnace comprising a charge distribution chute and a drive mechanism (12) with a first rotary drive shaft (14) for rotating the charge distribution chute and a second rotary drive shaft (16) for changing the angle of inclination of the charge distribution chute. The first and second drive shafts (14, 16) are coupled to respective first and second motors (18, 22) via a planetary gear mechanism (20) for driving the first and second drive shafts (14, 16). Each of the first and second rotary drive shafts (14, 16) have a first end (24, 24′) with a first pinion (26, 26′) interacting with the planetary gear mechanism (20) and a second end (28, 28′) with a second pinion (30, 30′) interacting with the charge distribution chute, the second end (28, 28′) of the rotary drive shaft (14, 16) extending through a furnace wall (32) into the furnace, a primary sealing element (46, 46′) being arranged between the furnace wall (32) and the rotary drive shaft (14, 16). The first rotary drive shaft (14) has a first rotation axis and the second rotary drive shaft (16) has a second rotation axis arranged parallel to and at a certain distance from the first rotation axis. A hollow socket (34, 34′) is provided in the furnace wall (32) for each of the rotary drive shafts (14, 16), the socket (34, 34′) comprising a first end (36, 36′) outside the furnace and facing the drive mechanism (12) and a second end (38, 38′) inside the furnace and facing the second pinion (30, 30′), the rotary drive shaft (14, 16) extending through the socket (34, 34′). The second end (38, 38′) of the socket (34, 34′) comprises a second end-wall (42, 42′) wherein the primary sealing element (46, 46′) is arranged between the socket (34, 34′) and the rotary drive shaft (14, 16), so as to face the second pinion (30, 30′), the second pinion (30, 30′) being removably connected to the rotary drive shaft (14, 16).
摘要:
A multiple hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the shaft furnace by rotating a distribution member about a central axis of the shaft furnace and at least two hoppers arranged in parallel and offset from the central axis above the rotary distribution device. Each hopper has a lower funnel part ending in an outlet portion and each hopper has a material gate valve with a shutter member associated to its outlet portion. According to the invention, each funnel part is configured asymmetrically with its outlet portion being eccentric and arranged proximate to the central axis, each outlet portion is oriented vertically so as to produce a substantially vertical outflow of bulk material and each material gate valve has a one-piece shutter member and is configured with its respective shutter member opening in a direction pointing away from the central axis such that any partial valve opening area is located on the side of the associated outlet portion proximate to the central axis.
摘要:
A method for feeding fines or granules into a light-arc furnace. A hollow electrode provided with a feeding channel is utilized, and is preferably a hollow Söderberg electrode. A conveyor introduces the fines or granules into the feeding channel so as to maintain in the feeding channel a hollow material in which a lower end is smelted in a molten metal bath.
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 device for distributing loose materials, arranged in a curtain of loose material tipped out from a means of conveying loose material includes a box with a top opening, at least one wall which extends transverse to the curtain of material inside the box to subdivide the box into at least two compartments, and at least two tipping-out means, one of the tipping-out means being associated with each of the compartments of the box, the tipping-out means being directed in such a way as to deflect the material received in the respective compartments into a distinct region of the hopper. The method for loading a hopper includes tipping loose material out in the form of a curtain of material over the hopper and splitting the curtain into at least two partial streams so as to deflect each of the partial streams towards a distinct region of the hopper.
摘要:
A device for direct observation of the charging process inside a shaft furnace during its operation, in particular a blast furnace, with a measuring lance, which is arranged above the charge column in the shaft furnace in such a way that it is exposed to the charge material falling from a charging device during the charging process, and sensor means which detect the position of the falling charge material in relation to the measuring lance.
摘要:
A charging device for a shaft furnace with a lower bell comprises lower means of blockage allowing an upper hopper to be isolated in a sealed manner from a lower hopper and allowing the retention of the charging material. In their open position, these lower means of blockage are positioned so that they unblock a free central passage for the flux of material. This flux is established in the form of a compact and focused flux. Means for moving the lower bell are positioned so as not to disturb the focusing of this flux. Positioned above the lower bell is a deflecting surface, which causes the focused flux to diverge with axial symmetry. Inter alia, a better symmetry in the filling of the lower hopper is obtained.