CN112941266B - Steelmaking feeding device, steel pushing mechanism and steelmaking feeding method - Google Patents

Abstract

The invention provides a steelmaking feeding device, a pushing mechanism and a steelmaking feeding method, wherein the steelmaking feeding device comprises: the side surface of the bottom of the preheating bin is provided with a discharge hole which is used for being connected with a steelmaking molten pool; the steel pushing mechanism is arranged at the bottom of the preheating bin and used for pushing steel materials in the preheating bin to move to a steelmaking melting pool through the discharge hole. The invention relieves the technical problems of poor preheating effect and easy steel sticking fault when smelting scrap steel in the prior art.

Description

Steelmaking feeding device, steel pushing mechanism and steelmaking feeding method

Technical Field

The invention relates to the technical field of steelmaking equipment, in particular to a steelmaking feeding device, a steel pushing mechanism and a steelmaking feeding method.

Background

The electric furnace can generate high-temperature flue gas in the process of smelting the scrap steel, and the scrap steel before entering the electric furnace molten pool is preheated by using the high-temperature flue gas, so that the utilization rate of energy input into the electric furnace can be improved. The prior electric furnace mainly comprises two structural forms, wherein one is a vertical shaft type electric furnace, scrap steel to be smelted is added from the top and moves into an electric furnace molten pool under the action of self gravity, high-temperature flue gas generated in the electric furnace molten pool diffuses from bottom to top to preheat the scrap steel, and the vertical shaft type electric furnace has a better preheating effect; however, as the scrap steel in the vertical shaft is supported by a plurality of fingers and is suspended above the smelting melting pool, in the actual operation process, some light and thin scrap steel is easy to melt and is adhered with the fingers together, so that the fingers are not opened to affect normal production, and the failure of sticking steel often occurs, thereby bringing potential safety hazard to normal production. The other is a horizontal continuous preheating electric furnace, and the scrap steel to be smelted is conveyed to a molten pool of the electric furnace along the horizontal direction, but usually only the scrap steel positioned at the top is preheated, and the whole preheating effect is poor.

Disclosure of Invention

The invention aims to provide a steelmaking feeding device, a steel pushing mechanism and a steelmaking feeding method, which solve the technical problems that the preheating effect is poor and the steel sticking fault is easy to occur when scrap steel is smelted in the prior art.

The above object of the present invention can be achieved by the following technical solutions:

the invention provides a steelmaking feeding device, which comprises: the steel pushing device comprises a preheating bin and a steel pushing mechanism, wherein a discharge hole is formed in the side face of the bottom of the preheating bin and is used for being connected with a steelmaking molten pool; the steel pushing mechanism is arranged at the bottom of the preheating bin and used for pushing steel materials in the preheating bin to move to a steelmaking melting pool through the discharge hole.

In a preferred embodiment, the steelmaking feeding device comprises a storage bin arranged above a preheating bin, a flashboard mechanism is arranged between the storage bin and the preheating bin, and the communication and the partition between the storage bin and the preheating bin are controlled through the flashboard mechanism.

In a preferred embodiment, a charging opening and a cover mechanism are arranged at the top of the storage bin, and the cover mechanism is used for controlling the opening and closing of the charging opening.

In a preferred embodiment, the cover mechanism comprises a cover body and a cover opening driving mechanism, one end of the cover body is rotatably connected to the storage bin, and the cover opening driving mechanism is connected with the cover body to drive the cover body to rotate relative to the storage bin.

In a preferred embodiment, the shutter mechanism comprises a shutter driving mechanism and at least two shutters, wherein at least two shutters are arranged in a split way and can slide relative to the storage bin respectively under the driving of the shutter driving mechanism.

In a preferred embodiment, the sliding direction of the flashboard is inclined downwards from outside to inside.

In a preferred embodiment, the storage bin is provided with a flashboard track, and rotating wheels in rolling fit with the flashboard track are respectively arranged on two sides of the flashboard.

In a preferred embodiment, the inner side of the wheel is provided with a rim.

In a preferred embodiment, the shutter is a box structure.

In a preferred embodiment, the shutter has a waterway cooling structure disposed therein.

In a preferred embodiment, the upper end contour of the inner wall of the preheating silo surrounds the lower end contour of the inner wall of the storage silo.

In a preferred embodiment, a flue gas outlet is arranged at the top of the preheating bin.

In a preferred embodiment, a material loading bottom plate is arranged at the bottom of the preheating bin; the pushing steel mechanism comprises a pushing steel driving mechanism and a pushing steel plate which is connected with the carrying bottom plate in a sliding mode, and the pushing steel driving mechanism is used for driving the pushing steel plate to move along the top surface of the carrying bottom plate in a direction pointing to or deviating from the discharge hole in a translation mode.

In a preferred embodiment, the front end of the steel pushing plate is connected with a movable steel pushing plate, the front end of the movable steel pushing plate is provided with a first steel pushing surface, and the movable steel pushing plate can swing up and down relative to the steel pushing plate and can swing under the action of self gravity until the first steel pushing surface is abutted to the loading bottom plate.

In a preferred embodiment, the movable pusher plate is provided with a waist-shaped hole extending along the sliding direction of the pusher plate, the pusher plate is provided with a pin shaft penetrating through the waist-shaped hole, and the pin shaft can move in the waist-shaped hole to enable the rear end of the movable pusher plate to abut against the pusher plate.

In a preferred embodiment, the steel pushing plate comprises a pushing plate body and a fixed pushing head plate fixedly connected to the front end of the pushing plate body, wherein a second steel pushing surface is arranged at the front end of the fixed pushing head plate, and the second steel pushing surface is positioned on the front side of the first steel pushing surface.

In a preferred embodiment, the push plate body is a box structure.

In a preferred embodiment, the preheating bin is provided with a steel pushing track, wheels and guide wheels matched with the steel pushing track are arranged on two sides of the steel pushing plate, a rotating shaft of the wheels is arranged along the top surface of the material carrying bottom plate, and the rotating shaft of the guide wheels points to the top surface of the material carrying bottom plate.

In a preferred embodiment, the loading bottom plate is arranged obliquely downwards in the direction pointing to the discharge opening.

The invention provides a steel pushing mechanism, which is applied to the steelmaking feeding device and comprises: the steel pushing driving mechanism is used for driving the steel pushing plate to translate; the front end of the steel pushing plate is connected with a movable push head plate, a first steel pushing surface is arranged at the front end of the movable push head plate, and the movable push head plate can swing up and down relative to the steel pushing plate.

The invention provides a steelmaking feeding method, which adopts the steelmaking feeding device and comprises the following steps:

s10, closing the flashboard mechanism;

s20, opening the cover mechanism, and adding steel into the storage bin;

s30, closing the cover mechanism;

s40, opening the flashboard mechanism;

s50, closing the flashboard mechanism;

s60, the pushing mechanism moves towards the discharge hole.

The invention has the characteristics and advantages that:

connecting the steelmaking feeding device with a steelmaking melting furnace; the steel materials to be smelted are added into the preheating bin, and the preheating bin can accommodate and bear the steel materials as the discharging hole is positioned on the side surface; the high-temperature flue gas in the steelmaking melting furnace can enter the preheating bin through the discharge hole and is diffused from bottom to top, and the steel material can fully absorb the heat of the high-temperature flue gas and is preheated well; after the preheating is completed, the steel pushing mechanism pushes the steel materials into a steelmaking molten pool. In the preheating process, the steel material is positioned in the preheating bin, so that the direct contact with a steelmaking melting furnace is reduced, and the occurrence of steel sticking faults is avoided.

By using the steelmaking feeding device, the preheating effect on the scrap steel is improved, the faults of sticking steel are reduced, and the scrap steel can be stably fed into a steelmaking melting furnace.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an isometric view of a steelmaking feeding device provided by the invention;

FIG. 2 is a front view of the steelmaking feeding device shown in FIG. 1;

FIG. 3 is a cross-sectional view in the N-N direction of FIG. 2;

FIG. 4 is a schematic view of the structure of a shutter in the steel making charging device shown in FIG. 1;

FIG. 5 is a cross-sectional view in the M-M direction of FIG. 2;

FIG. 6 is a schematic view of a push plate in the steelmaking feeding apparatus shown in FIG. 1;

FIG. 7 is a schematic view of the structure of the movable and fixed pusher plates in the steel making charging device shown in FIG. 1;

FIG. 8 is a schematic view of the structure of the movable pusher plate in the steel making charging device shown in FIG. 1;

FIG. 9 is a schematic illustration of a steelmaking feeding method according to the present invention.

Reference numerals illustrate:

1. a cover mechanism; 101. a cover body; 2. a cover opening driving mechanism; 23. a first hydraulic cylinder;

31. an upper part; 32. a lower part;

4. a flashboard mechanism; 41. a flashboard; 411. a cooling water inlet; 412. a cooling water outlet; 42. a shutter driving mechanism; 421. a second hydraulic cylinder;

5. a storage bin; 51. a feed inlet;

6. preheating a stock bin; 7. a discharge port; 8. a flue gas outlet;

9. a steel structural frame; 10. a wear resistant steel plate;

11. a loading bottom plate; 111. the top surface of the material carrying bottom plate;

12. a steel pushing mechanism; 121. pushing the steel plate; 122. a pusher plate body; 13. a steel pushing driving mechanism; 131. a third hydraulic cylinder;

14. a mounting base;

15. pushing the steel rail; 16. a wheel; 19. a guide wheel;

17. a rotating wheel; 171. a rim; 18. a ram rail;

20. fixing a push head plate; 201. a second steel pushing surface;

21. a movable push head plate; 211. a first steel pushing surface; 212. a waist-shaped hole; 213. the rear end of the movable push head plate;

22. and a pin shaft.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

The present invention provides a steelmaking feeding device, as shown in fig. 1 and 2, comprising: the steel pushing device comprises a preheating bin 6 and a steel pushing mechanism 12, wherein a discharge hole 7 is formed in the side surface of the bottom of the preheating bin 6, and the discharge hole 7 is used for being connected with a steelmaking molten pool; the pushing steel mechanism 12 is arranged at the bottom of the preheating bin 6 and is used for pushing steel materials in the preheating bin 6 to move to a steelmaking molten pool through the discharge hole 7.

Connecting the steelmaking feeding device with a steelmaking melting furnace; the steel materials to be smelted are added into the preheating bin 6, and the preheating bin 6 can contain and bear the steel materials as the discharging hole 7 is positioned on the side surface; the high-temperature flue gas in the steelmaking melting furnace can enter the preheating bin 6 through the discharge hole 7 and is diffused from bottom to top, and the steel material can fully absorb the heat of the high-temperature flue gas and is preheated well; after the preheating is completed, the steel pushing mechanism 12 pushes the steel into the steelmaking bath. In the preheating process, the steel material is positioned in the preheating bin 6, so that the direct contact with a steelmaking melting furnace is reduced, and the occurrence of steel sticking faults is avoided.

By using the steelmaking feeding device, the preheating effect on the scrap steel is improved, the faults of sticking steel are reduced, and the scrap steel can be stably fed into a steelmaking melting furnace.

Further, steelmaking feeding device is including locating the storage silo 5 of preheating the top of feed bin 6, is equipped with flashboard mechanism 4 between storage silo 5 and the feed bin 6 that preheats, through flashboard mechanism 4, control the intercommunication and the wall between storage silo 5 and the feed bin 6 that preheats. When the steel material preheating device is used, a proper amount of steel material is firstly added into the storage bin 5, and the flashboard mechanism 4 is opened to enable the steel material to fall into the preheating bin 6; after the flashboard mechanism 4 is closed, the outward dissipation of heat in the preheating bin 6 can be reduced, and the preheating effect is improved.

In the operation process of the steelmaking feeding device, after preheating for a period of time is completed, a steel pushing mechanism 12 pushes out a part of steel materials in a preheating bin 6, and part of steel materials are reserved in the preheating bin 6; then, the flashboard mechanism 4 is opened, steel materials in the storage bin 5 fall into the preheating bin 6 and fall onto the steel materials reserved in the preheating bin 6, so that impact of the steel materials on the bottom of the preheating bin 6 can be reduced, damage is reduced, and service life is prolonged.

In order to improve the operating life of the device, the side wall of the preheating bin 6 and the side wall of the storage bin 5 respectively comprise a steel structure frame 9 and a wear-resistant steel plate 10 attached to the inner side. Preferably, the wear-resistant steel plate 10 is provided with a plurality of nozzles at the outside thereof for cooling in a spray manner.

As shown in fig. 1, a charging port 51 and a cover mechanism 1 are arranged at the top of the storage bin 5, and the cover mechanism 1 is used for controlling the opening and closing of the charging port 51. Steel is added into the storage bin 5 from the top; the flashboard mechanism 4 and the cover body mechanism 1 are matched to operate, and the cover body mechanism 1 is closed before the flashboard mechanism 4 is opened, so that heat dissipation outwards in the steelmaking feeding device is reduced. In addition, the flue gas outlet 8 is usually connected with a workshop dust removal fan, and the cover body mechanism 1 is closed, so that larger fluctuation of the load of the workshop fan can be avoided, and the stable operation of the fan is facilitated; meanwhile, the flue gas temperature of the flue gas outlet 8 can be kept relatively stable, and the reprocessing of later flue gas is facilitated.

In one embodiment of the present invention, the cover mechanism 1 includes a cover 101 and a cover opening driving mechanism 2, wherein one end of the cover 101 is rotatably connected to the storage bin 5, and the cover opening driving mechanism 2 is connected to the cover 101 to drive the cover 101 to rotate relative to the storage bin 5. As shown in fig. 1, the cover body 101 is composed of a steel structure frame and a steel plate, one end of the cover body 101 is provided with a rotating shaft, the rotating shaft is arranged around a bearing seat, the bearing seat is arranged at the top of the storage bin 5, and the cover opening driving mechanism 2 can drive the cover body 101 to turn up and down so as to open or close a charging hole; the structure of the door drive mechanism 2 is not limited to one, and preferably, the power source in the door drive mechanism 2 includes the first hydraulic cylinder 23.

When the flashboard mechanism 4 is closed, the flashboard mechanism 4 can bear steel materials; when the shutter mechanism 4 is opened, the steel material can smoothly fall into the preheating bin 6 under the action of the dead weight. Since the shutter mechanism 4 bears the weight of the steel material, the shutter mechanism 4 has some difficulties in opening, and in order to enable the shutter mechanism 4 to be smoothly opened, the inventors have improved the shutter mechanism 4: the gate mechanism 4 comprises a gate driving mechanism 42 and at least two gates 41, wherein the at least two gates 41 are arranged in a split way and can slide relative to the storage bin 5 respectively under the driving of the gate driving mechanism 42, and as shown in fig. 2, when each gate 41 withdraws outwards, the gate mechanism 4 is opened; the shutter mechanism 4 is closed when projecting inwardly to the abutment of the respective shutters 41. The number of the shutters 41 is not limited to two, and when the number of the shutters 41 is two, the two shutters 41 are oppositely arranged, and can be bi-directionally split; when the number of the shutters 41 is greater than or equal to three, the respective shutters 41 are circumferentially distributed. In some embodiments, ram drive mechanism 42 includes a plurality of second hydraulic cylinders 421, second hydraulic cylinders 421 being in one-to-one driving connection with rams 41.

The shutter 41 may slide in the horizontal direction or may slide in a direction inclined with respect to the horizontal direction. Preferably, as shown in fig. 2, the shutter 41 is inclined with respect to the horizontal direction, and the sliding direction thereof is inclined from outside to inside downward, so that the steel material moves downward along the upper surface of the shutter 41 after opening.

Further, the storage bin 5 is provided with a gate plate rail 18, and the two sides of the gate plate 41 are respectively provided with a runner 17 in rolling fit with the gate plate rail 18 so that the gate plate 41 can move smoothly. As shown in fig. 3, the inner side of the rotor 17 is provided with a rim 171, and the rim 171 is in contact with and matched with the side surface of the shutter rail 18, and plays a guiding role in the operation of the shutter 41, so that the shutter 41 is prevented from being deviated along the axial direction of the rotor 17.

The shutter 41 includes a plurality of steel plates that are joined and assembled into a box structure to enhance the load bearing capacity of the shutter 41 and to reduce the dead weight. Preferably, a waterway cooling structure is provided in the shutter 41, and as shown in fig. 4, the waterway cooling structure includes a cooling water inlet 411 and a cooling water outlet 412 provided at the sides of the shutter 41.

In an embodiment of the present invention, the cross section of the inner cavity of the preheating bin 6 is larger than the cross section of the inner cavity of the storage bin 5, the upper end contour of the inner wall of the preheating bin 6 surrounds the lower end contour of the inner wall of the storage bin 5, and a gap is arranged between the inner wall of the preheating bin 6 and the inner wall of the storage bin 5 on the projection of the horizontal cross section, so that the abrasion of steel materials to the side wall of the preheating bin 6 can be reduced in the process of falling into the preheating bin 6 in the storage bin 5.

In an embodiment of the invention, the top of the preheating bin 6 is provided with the flue gas outlet 8, high-temperature flue gas enters the preheating bin 6 from the discharge hole 7 at the bottom, diffuses upwards, and is discharged out of the preheating bin 6 through the flue gas outlet 8, thereby being beneficial to smooth flow of the high-temperature flue gas, reducing the entry of the high-temperature flue gas into the storage bin 5, and reducing diffusion of the high-temperature flue gas to the external environment during charging. The number of flue gas outlets 8 may be one or more.

The inventor further improves the structure of the preheating bin 6: the bottom of the preheating bin 6 is provided with a material carrying bottom plate 11, and the material carrying bottom plate 11 has higher strength so as to better carry steel materials. The pushing steel mechanism 12 comprises a pushing steel driving mechanism 13 and a pushing steel plate 121 which is connected to the loading bottom plate 11 in a sliding manner, and the pushing steel driving mechanism 13 is used for driving the pushing steel plate 121 to translate along the top surface 111 of the loading bottom plate, and to point to or depart from the discharging hole 7. The structure of the pushing steel driving mechanism 13 may be varied, and preferably, the pushing steel driving mechanism 13 includes a third hydraulic cylinder 131, and the third hydraulic cylinder 131 is in driving connection with the pushing steel plate 121 to drive the pushing steel plate 121 to reciprocate.

Further, the front end of the steel pushing plate 121 is connected with a movable steel pushing plate 21, and the front end of the movable steel pushing plate 21 is provided with a first steel pushing surface 211, as shown in fig. 6-8, the movable steel pushing plate 21 can swing up and down relative to the steel pushing plate 121, and can swing under the action of self gravity until the first steel pushing surface 211 is abutted against the top surface 111 of the loading bottom plate. The pushing steel plate 121 moves towards the discharge hole 7 under the drive of the pushing steel driving mechanism 13, the first pushing steel surface 211 faces forward, smaller particles can be pushed away, and when the pushing steel plate is blocked, the movable pushing head plate 21 can swing and adjust relative to the pushing steel plate 121, so that the phenomenon of blocking materials is reduced. Preferably, the first pushing steel surface 211 has a circular arc shape protruding forward, so that smaller particles can be better pushed away.

As shown in fig. 7, the movable push head plate 21 is provided with a waist-shaped hole 212 extending along the sliding direction of the push steel plate 121, the push steel plate 121 is provided with a pin shaft 22 penetrating through the waist-shaped hole 212, and the pin shaft 22 can move in the waist-shaped hole 212 to enable the rear end 213 of the movable push head plate to be abutted with the push steel plate 121, so that when the push steel plate 121 moves forwards, the rear end 213 of the movable push head plate is abutted with the push steel plate, the push force can be better transmitted to the movable push head plate 21, the stress of the pin shaft 22 is reduced, the fault of the connecting structure of the movable push head plate 21 and the push steel plate 121 is reduced, and the running stability of the device is improved.

Further, the steel pushing plate 121 includes a pushing plate body 122 and a fixed pushing head plate 20 fixedly connected to the front end of the pushing plate body 122, the front end of the fixed pushing head plate 20 is provided with a second steel pushing surface 201, the second steel pushing surface 201 is located at the front side of the first steel pushing surface 211, and the first steel pushing surface 211 and the second steel pushing surface 201 are matched to facilitate pushing steel material out of the discharge hole 7 smoothly. Preferably, the second pushing surface 201 is arranged above the first pushing surface 211. The fixed pusher plate 20 is detachably connected to the pusher body 122 for replacement. The push plate body 122 is of a box structure, which is beneficial to reducing dead weight under the condition of ensuring higher strength.

The loading bottom plate 11 is arranged in a downward inclined manner along the direction pointing to the discharge port 7, and as shown in fig. 2, the inclination angle between the top surface of the loading bottom plate 11 and the horizontal plane is denoted as alpha. The sliding direction of the pushing steel plate 121 is parallel to the top surface 111 of the loading bottom plate, and the pushing steel plate 121 moves downwards and obliquely forwards, so that the steel material can be pushed away better.

In order to make the pushing steel plate 121 move more stably, the preheating bin 6 is provided with a pushing steel rail 15, as shown in fig. 5 and 6, both sides of the pushing steel plate 121 are provided with wheels 16 and guide wheels 19 matched with the pushing steel rail 15, the rotating shafts of the wheels 16 are arranged along the top surface 111 of the loading bottom plate, the rotating shafts of the guide wheels 19 are directed to the top surface 111 of the loading bottom plate, the wheels 16 play a role in bearing the pushing steel plate 121, and the wheels 16 and the guide wheels 19 are matched to play a role in guiding, so that the pushing steel plate 121 moves more smoothly along the pushing steel rail 15. Preferably, the axis of rotation of the guide wheel 19 is perpendicular to the top surface 111 of the loading floor.

The shape of the preheating bin 6 can be flexibly set, for example, the preheating bin 6 can be rectangular or cylindrical. The bottom of the preheating bin 6 is provided with a mounting base 14, and the preheating bin 6 is fixed on the mounting base 14 through bolts. The device can be adjacently arranged in the steelmaking furnace or can be fixed with the steelmaking furnace; the device can be independently arranged, and the distance between the device and the steelmaking melting furnace can be flexibly arranged, so long as the device can guide high-temperature flue gas generated by the steelmaking melting furnace into the preheating bin, and the steel material is pushed into the steelmaking melting furnace. The apparatus may be used with various types of steelmaking baths, for example with an electric furnace.

In one embodiment of the invention, the steelmaking feeding device further comprises a receiving and feeding device, the receiving and feeding device is connected with the discharge hole 7, steel materials pushed out of the discharge hole 7 fall into the receiving and feeding device, and the receiving and feeding device feeds the steel materials into the steelmaking melting furnace. The receiving and feeding device can send preheated scrap steel into the furnace under the condition of no or little temperature drop. In other embodiments, the tap hole 7 is connected to a steelmaking furnace, and the preheated steel charge is pushed directly into the furnace.

In order to facilitate transportation, installation and processing of the steelmaking feeding device, the whole body formed by the storage bin 5 and the preheating bin 6 can be manufactured into an upper part 31 and a lower part 32 which can be assembled, the upper part 31 and the lower part 32 can be respectively processed, stored and transported, and after being transported to an installation site, bolts, multi-point pin shafts, pin shafts provided with wedge-shaped holes and/or wedge penetrating plates can be adopted to connect the upper part 31 and the lower part 32 together.

The steelmaking feeding device is not limited to be applied to the feeding link of scrap steel smelting, and can be applied to other production processes adopting the feeding mode.

Example two

The invention provides a steel pushing mechanism, which is applied to the steelmaking feeding device, wherein the steel pushing mechanism 12 comprises: a steel pushing driving mechanism 13 and a steel pushing plate 121, wherein the steel pushing driving mechanism 13 is used for driving the steel pushing plate 121 to translate; the front end of the steel pushing plate 121 is connected with a movable push head plate 21, a first steel pushing surface 211 is arranged at the front end of the movable push head plate 21, and the movable push head plate 21 can swing up and down relative to the steel pushing plate 121.

The steel pushing plate 121 moves forward under the drive of the steel pushing driving mechanism 13, the first steel pushing surface 211 faces forward, smaller particles can be pushed away, and when the steel pushing plate is blocked, the movable push head plate 21 can swing and adjust relative to the steel pushing plate 121, so that the phenomenon of material clamping is reduced.

Example III

The invention provides a steelmaking feeding method, which adopts the steelmaking feeding device, as shown in figure 9, and comprises the following steps:

s10, closing the flashboard mechanism 4;

s20, opening the cover mechanism 1, and adding steel into the storage bin 5;

s30, closing the cover mechanism 1;

s40, opening the flashboard mechanism 4;

s50, closing the flashboard mechanism 4;

s60, the pushing mechanism 12 moves towards the discharge hole 7.

In step S40, after the shutter mechanism 4 is opened, the steel material in the storage bin 5 falls into the preheating bin 6 under the action of its own weight, and in this step, the cover mechanism 1 is in a closed state, so that the diffusion of heat in the preheating bin 6 to the external environment can be reduced. Preferably, before opening the shutter mechanism 4, the pusher mechanism 12 is moved to an end remote from the discharge port 7. In step S20, when steel is added to the storage bin 5, the shutter mechanism 4 is in a closed state, so that heat diffusion from the preheating bin 6 to the external environment can be reduced.

In the steelmaking feeding method, the steel materials in the preheating bin 6 are pushed to the discharge hole 7 by the pushing steel plate 121, the pushing steel plate 121 moves forward once, the pushed steel materials are close to the self height of the pushing steel plate 121, and a proper amount of steel materials are pushed into the steelmaking melting furnace through repeated reciprocating movements of the pushing steel plate 121. Preferably, by controlling the amount of steel pushed away in step S60, the steel that is not pushed away remains in the preheating silo 6 before step S40, so that the impact of the falling steel on the preheating silo 6 is reduced.

In the preheating bin 6, the steel material is preheated under the action of high-temperature flue gas so as to recycle the heat of the steelmaking melting furnace, reduce the direct contact between the steel material and molten steel in the steelmaking melting furnace in the preheating process, avoid the steel material melting caused by the excessively high preheating temperature of the steel material, and effectively reduce the risk of adhesion.

The foregoing is merely a few embodiments of the present invention and those skilled in the art may make various modifications or alterations to the embodiments of the present invention in light of the disclosure herein without departing from the spirit and scope of the invention.

Claims (15)

1. A steelmaking feeding device, comprising: the steel pushing device comprises a preheating bin and a steel pushing mechanism, wherein a discharge hole is formed in the side face of the bottom of the preheating bin and is used for being connected with a steelmaking molten pool; the steel pushing mechanism is arranged at the bottom of the preheating bin and is used for pushing steel materials in the preheating bin to move to a steelmaking melting pool through the discharge hole;

a material loading bottom plate is arranged at the bottom of the preheating bin; the steel pushing mechanism comprises a steel pushing driving mechanism and a steel pushing plate which is connected with the material loading bottom plate in a sliding manner, and the steel pushing driving mechanism is used for driving the steel pushing plate to translate along the top surface of the material loading bottom plate, and the steel pushing plate points to or deviates from the material outlet;

the front end of the steel pushing plate is connected with a movable steel pushing plate, the front end of the movable steel pushing plate is provided with a first steel pushing surface, and the movable steel pushing plate can swing up and down relative to the steel pushing plate and can swing under the action of self gravity until the first steel pushing surface is abutted against the material loading bottom plate;

the movable push head plate is provided with a waist-shaped hole extending along the sliding direction of the push steel plate, the push steel plate is provided with a pin shaft penetrating through the waist-shaped hole, and the pin shaft can move in the waist-shaped hole to enable the rear end of the movable push head plate to be in contact with the push steel plate;

the steel pushing plate comprises a pushing plate body and a fixed pushing head plate fixedly connected to the front end of the pushing plate body, a second steel pushing surface is arranged at the front end of the fixed pushing head plate, and the second steel pushing surface is positioned at the front side of the first steel pushing surface;

the steelmaking feeding device comprises a storage bin arranged above a preheating bin, a flashboard mechanism is arranged between the storage bin and the preheating bin, and the communication and the separation between the storage bin and the preheating bin are controlled through the flashboard mechanism;

the top of the storage bin is provided with a feed inlet and a cover mechanism, and the cover mechanism is used for controlling the opening and closing of the feed inlet.

2. The steelmaking feeding apparatus as defined in claim 1 wherein said cover mechanism includes a cover and a cover opening drive mechanism, one end of said cover being rotatably connected to said storage bin, said cover opening drive mechanism being connected to said cover for driving said cover to rotate relative to said storage bin.

3. The steelmaking feeding apparatus as set forth in claim 1 wherein said ram mechanism includes a ram drive mechanism and at least two rams, at least two of said rams being disposed in opposed relation and being capable of sliding relative to said storage silo, respectively, under the drive of said ram drive mechanism.

4. A steelmaking feeding apparatus as claimed in claim 3 wherein the slide direction of the ram is inclined downwardly from the outside to the inside.

5. A steelmaking feeding apparatus as claimed in claim 3 wherein the storage bin is provided with a ram track, and wheels in rolling engagement with the ram track are mounted on each side of the ram.

6. The steelmaking feeding apparatus as defined in claim 5 wherein a rim is provided on the inside of said wheel.

7. A steelmaking feeding apparatus as claimed in claim 3 wherein said shutter is of box construction.

8. The steelmaking feeding apparatus as set forth in claim 7 wherein said ram is provided with a waterway cooling structure therein.

9. The steelmaking feeding apparatus as set forth in claim 1, wherein an upper end contour of an inner wall of said preheating bin surrounds a lower end contour of an inner wall of said storage bin.

10. The steelmaking feeding apparatus as set forth in claim 1, wherein a flue gas outlet is provided at a top of said preheating bin.

11. The steel-making feeding device according to claim 1, wherein the push plate body is of a box structure.

12. The steelmaking feeding device according to claim 1, wherein the preheating bin is provided with a steel pushing rail, wheels and guide wheels matched with the steel pushing rail are arranged on two sides of the steel pushing plate, a rotating shaft of the wheels is arranged along the top surface of the material carrying bottom plate, and the rotating shaft of the guide wheels is directed to the top surface of the material carrying bottom plate.

13. The steel-making feeding device according to claim 1, wherein the loading bottom plate is arranged obliquely downward in a direction pointing to the discharge port.

14. A steel pushing mechanism applied to the steelmaking feeding device as claimed in any one of claims 1 to 13, characterized by comprising: the steel pushing driving mechanism is used for driving the steel pushing plate to translate;

the front end of the steel pushing plate is connected with a movable push head plate, a first steel pushing surface is arranged at the front end of the movable push head plate, and the movable push head plate can swing up and down relative to the steel pushing plate.

15. A steelmaking feeding method employing a steelmaking feeding apparatus as claimed in any one of claims 1 to 13, comprising:

s10, closing the flashboard mechanism;

s20, opening the cover mechanism, and adding steel into the storage bin;

s30, closing the cover mechanism;

s40, opening the flashboard mechanism;

s50, closing the flashboard mechanism;

s60, the pushing mechanism moves towards the discharge hole.