CN216977542U - Furnace top feeding device and metallurgical furnace - Google Patents

Abstract

The utility model provides a furnace top feeding device and a metallurgical furnace. The furnace top feeding device comprises a discharging hopper assembly, a top bell assembly, a hopper assembly, a distributing hopper and a door opening assembly; the top of the discharging hopper assembly is provided with a feeding hole, and the bottom of the discharging hopper assembly is provided with the discharging hole; the discharging hopper assembly, the hopper assembly and the distribution hopper are axially communicated; the bottom of the material distributing hopper is provided with the material distributing opening; the cloth fill is big-end-up's reducing rectangle structure. The utility model adopts the reducing rectangular distributing hopper, and can evenly distribute the material in the hopper; in addition, the distributing hopper with the structure has strong adaptability to various metallurgical furnace types, and is particularly suitable for top charging of materials with small hearths and large particle sizes.

Description

Furnace top feeding device and metallurgical furnace

Technical Field

The utility model relates to the technical field of metallurgical equipment, in particular to a furnace top feeding device and a metallurgical furnace.

Background

The metallurgical furnace is a main device of a pyrometallurgical process, the metallurgical furnace has various types, such as a shaft furnace, a closed blast furnace, a reverberatory furnace, a flash furnace and the like, and the furnace top charging device is a key device for keeping the tightness of the metallurgical furnace and realizing charging of the metallurgical furnace.

Different metallurgical furnaces are different in adaptability to the granularity of materials entering the furnace, but the granularity of common materials is not too large, so that most bottom clocks of the traditional metallurgical furnace top feeding device adopt a cone type, the materials are thrown down in the furnace in an umbrella shape under the conditions of small particle size of the materials and large furnace, the materials are not easy to impact a furnace wall, the uniform distribution of small-particle materials in the furnace can be realized, and the full combustion of the materials is facilitated.

With the wide application of pyrometallurgical processes, more and more small smelting plants, especially solid waste treatment plants, begin to use metallurgical furnaces to treat solid waste such as copper-containing sludge, electronic circuit boards, and the like. However, the capacity of the small factories is small, and in order to adapt to working conditions and save investment, the small-hearth metallurgical furnaces are more prone to being matched with small-volume furnace top charging devices; moreover, because often the raw materials are not supplied enough, in order to save fuel consumption and reduce the combustion speed, it is more inclined to adopt large-particle size fuel blocks (such as coal, carbon essence, etc.), the particle size of the fuel blocks is increased from 50mm to about 300mm at most, and the traditional furnace top charging device is no longer adapted to such working condition, which is embodied in that:

(1) and the material is blocked frequently. Because the volume of the furnace top feeding device is reduced, the bottom bell is correspondingly reduced, and the materials are greatly increased, the materials arch at the bottom of the furnace top feeding device, and when the bottom bell is completely opened, the materials still cannot fall down, so that the normal production is seriously influenced.

(2) The furnace is often dead. Because the material increases, and furnace is the rectangle and the area very reduces, and when the furnace charge was umbelliform whereabouts through the toper bell, very easily strikeed the oven and finally mostly dropped to furnace middle part position, presented the distribution of hill package form, but do not have fuel piece and material along the oven all around, the unable and furnace charge especially fuel piece of oxygen fully contact, the burning of spouting from the furnace lateral wall, consequently frequently die the stove, not only influence normal production, economic loss is huge moreover.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a furnace top charging device and a metallurgical furnace which have strong adaptability to various furnace types and are particularly suitable for small-hearth and large-particle-size materials.

The technical scheme of the utility model is as follows: a furnace top feeding device comprises a discharging funnel assembly, a top bell assembly capable of opening or closing a blanking port, a funnel assembly arranged at the bottom of the discharging funnel assembly, a distributing hopper arranged at the bottom of the funnel assembly, and a door opening assembly capable of opening or closing the distributing port;

the top of the discharging hopper assembly is provided with a feeding hole, and the bottom of the discharging hopper assembly is provided with the discharging hole; the discharging hopper assembly, the hopper assembly and the distribution hopper are axially communicated; the bottom of the material distributing hopper is provided with the material distributing opening;

the cloth fill is big-end-up's reducing rectangle structure.

In the scheme, the material can be uniformly distributed in the material hopper by adopting the reducing rectangle; in addition, the distributing hopper with the structure has strong adaptability to various metallurgical furnace types, and is particularly suitable for top charging of materials with small hearths and large particle sizes.

The small hearth is as follows: the hearth is rectangular and has an area of 2-4m²Left and right blast furnace hearths.

Large particle size means: the granularity of the material to be charged is between 200 and 300 mm.

Preferably, the furnace top feeding device further comprises a support frame, a rectangular cavity is formed in the support frame, a first flange plate extending in the radial direction is arranged at the bottom of the funnel assembly, a second flange plate extending in the radial direction is arranged on the distribution hopper, the first flange plate and the second flange plate are both rectangular, the first flange plate is attached to the upper end face of the rectangular cavity formed by the support frame, and the second flange plate is attached to the lower end face of the rectangular cavity formed by the support frame; the hopper assembly and the distributing hopper are communicated with the rectangular cavity.

Preferably, the door opening assembly comprises a door opening driving device, a door opening traction device and a door panel; the door opening driving device comprises a first driving actuator, a first lever and a first bearing seat; the door opening traction device comprises a second lever arm shaft, a lever arm and a connecting rope assembly;

the first lever is a crank arm with A, B, C three ends, the B end of the first lever is hinged with the first bearing seat through the second lever arm shaft, and the first bearing seat is arranged on the funnel assembly; one end of the first driving actuator is hinged with the end A of the first lever, and the other end of the first driving actuator is installed on the hopper assembly;

the lever arm is fixedly sleeved on the second lever arm shaft, one end of the connecting rope assembly is connected with the door panel, and the other end of the connecting rope assembly is connected with the lever arm; the door plate is arranged on the material distribution opening in an openable manner.

Preferably, the door panels are of a split-type double door structure.

Preferably, the door opening driving device further comprises a first balance weight, and the first balance weight is mounted at the C-end of the first lever.

Preferably, the connecting rope assembly comprises a first chain, an ear handle shaft, an ear handle, a shackle and a second chain, the lever arm is connected to one end of the first chain, and the ear handle is connected to the other end of the first chain through the ear handle shaft; one end of the second chain is installed at the bottom of the lug through the shackle, and the other end of the second chain is connected with the door panel through the shackle.

Preferably, the top charging device further comprises a top bell driving device for driving the top bell assembly to open and close; the top clock assembly comprises a top clock, a top clock lever arm and a first lever arm shaft; one end of the top clock lever arm is fixedly provided with the first lever arm shaft, and the other end of the top clock lever arm is hinged with the top clock;

the top clock driving device comprises a second driving actuator, a second bearing seat and a second lever;

the second lever is a crank arm with D, E, F three ends, the E end of the second lever is provided with a second bearing seat, one end of the first lever arm shaft is connected with the second bearing seat, and the other end of the first lever arm shaft is arranged on the funnel component; one end of the second driving actuator is hinged with the D end of the second lever, and the other end of the second driving actuator is installed on the funnel assembly.

Preferably, the top bell driving apparatus further comprises a second counter weight mounted to an F-end of the second lever.

Preferably, the discharge funnel assembly comprises a discharge funnel, a mounting seat, a buffering component and a dust collecting pipe, wherein the discharge funnel is mounted on the mounting seat through the buffering component, and the buffering component is arranged close to the feed inlet; the dust collecting pipe penetrates through the mounting seat and is communicated with the interior of the discharging hopper.

The utility model also provides a metallurgical furnace comprising the furnace top charging device.

Compared with the related technology, the utility model has the beneficial effects that:

the furnace top feeding device adopts a variable-diameter rectangular distributing hopper, and uniform distribution can be carried out in the distributing hopper; in addition, the distributing hopper with the structure has strong adaptability to various metallurgical furnace types, and is particularly suitable for furnace top charging of small-hearth and large-particle-size materials;

the furnace top feeding device adopts a top charging bell and a bottom double-door intermittent opening and closing type working mechanism, can effectively prevent smoke dust in the furnace from overflowing and is environment-friendly;

thirdly, the failure rate is low, and the high temperature environment is resisted.

Drawings

Fig. 1 is a schematic front view of a furnace top charging device provided by the utility model;

FIG. 2 is a schematic top view of FIG. 1;

FIG. 3 is a schematic sectional view taken along G-G of FIG. 2;

FIG. 4 is a schematic structural view of the discharge hopper assembly of FIG. 1;

fig. 5 is a schematic structural view of the door opening driving device in fig. 1;

FIG. 6 is a schematic structural diagram of the top clock driving apparatus of FIG. 1;

FIG. 7 is a schematic diagram of the top clock assembly of FIG. 1;

fig. 8 is a schematic structural view of the door opening traction apparatus of fig. 3;

FIG. 9 is a schematic view of the bottom hopper of FIG. 3;

FIG. 10 is a schematic structural view of the supporting frame in FIG. 3;

FIG. 11 is a schematic view of the structure of the hopper of FIG. 3;

FIG. 12 is a schematic view of the door panel of FIG. 3;

fig. 13a shows the first step in the operating cycle of the top charging installation according to the utility model: the material tank is in place and is ready for discharging;

fig. 13b is a second step in the operating cycle of the top charging installation according to the utility model: the top bell is opened, and the charging bucket is unloaded;

fig. 13c shows the third step in the working cycle of the top charging installation according to the utility model: schematic diagram of bucket transfer and top clock closing;

fig. 13d shows the fourth step in the working cycle of the top charging installation according to the utility model: a schematic diagram of door panel opening and charging starting;

fig. 13e shows the fifth step in the working cycle of the top charging installation according to the utility model: schematic view of door panel closure with addition completed.

In the drawings: 1-a discharging funnel assembly, 2-a door opening driving device, 3-a top bell driving device, 4-an upper funnel, 5-an asbestos rubber plate, 6-a top bell assembly, 7-a middle funnel, 8-a bottom funnel, 9-a supporting frame, 10-a reducing rectangular hopper, 11-a hanging lug, 12-a door plate, 13-a door opening traction device, 14-a blanking port, 15-a material distribution port, 16-a material inlet, 17-a funnel component, 18-a door opening component, 19-a connecting rope component, 20-a mounting seat and 21-a buffer component;

1.1-a discharge funnel, 1.2-a buffer shaft, 1.3-a baffle, 1.4-a spring, 1.5-a sleeve, 1.6-an opening pin, 1.7-a dust collecting pipe, 1.8-a flange and 1.9-a mounting edge;

2.1-a first counterweight, 2.2-a first lever, 2.3-a first driving actuator, 2.4-a first support and 2.5-a first bearing seat;

3.1-a second support, 3.2-a second driving actuator, 3.3-a second bearing seat, 3.4-a second lever and 3.5-a second counterweight;

6.1-top clock, 6.2-third bearing seat, 6.3-first pin shaft, 6.4-top clock shaft, 6.5-top clock lever arm, 6.6-first key and 6.7-first lever arm shaft;

13.1-second lever arm shaft, 13.2-lever arm, 13.3-cover plate, 13.4-second pin shaft, 13.5-first chain, 13.6-ear handle shaft, 13.7-ear handle, 13.8-shackle, 13.9-second chain, 13.10-second key;

8.1-a first flange plate, 9.1-a rectangular cavity, 10.1-a second flange plate and 12.1-a hanging shaft; 12.2-lifting lug, 20.1-mounting plate;

100-bottom discharge type charging bucket.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1 and fig. 2, the furnace top charging device provided in this embodiment includes a discharging funnel assembly 1, a top bell assembly 6 capable of opening or closing the blanking port, a funnel component 17 installed at the bottom of the discharging funnel assembly 1, a distribution hopper 10 installed at the bottom of the funnel component 17, a door opening component 18 capable of opening or closing the distribution port 15, and a support frame 9.

As shown in fig. 3 and 4, the discharge funnel assembly 1 includes a discharge funnel 1.1, a mounting base 20, a buffer assembly 21 and a dust collecting pipe 1.7. The discharging hopper 1.1 is installed on the installation seat 20 through the buffering assembly 21, and the buffering assembly 21 is close to the feeding hole 16. The method specifically comprises the following steps: the buffer assembly 21 comprises a buffer shaft 1.2, a baffle plate 1.3, a spring 1.4, a sleeve 1.5 and a cotter pin 1.6. The top periphery of discharge hopper 1.1 is equipped with installation border 1.9, be equipped with on mount pad 20 with relative mounting panel 20.1 that sets up about installation border 1.9. The buffer shaft 1.2 vertically penetrates through the mounting edge 1.9 and the mounting plate 20.1, the sleeve 1.5 is sleeved on the buffer shaft 1.2, and the spring 1.4 is sleeved on the sleeve 1.5. Sleeve 1.5 and mounting panel 20.1 up end butt, the bottom of installation border 1.9 and the bottom of mounting panel 20.1 are located respectively to baffle 1.3, spring 1.4 butt in between the up end of baffle 1.3 and mounting panel 20.1 of the bottom of installation border 1.9. The buffer components 21 are uniformly distributed along the periphery of the discharging hopper 1.1.

The side wall of the discharging funnel 1.1 close to the bottom is provided with a plurality of openings, and the dust collecting pipe 1.7 horizontally penetrates through the mounting seat 20 and is connected with the openings on the discharging funnel 1.1.

The top of the discharging hopper 1.1 is provided with a feeding hole 16, and the bottom is provided with the blanking hole 14. The tail end of the dust collection pipe 1.7 is provided with a flange 1.8 used for being connected with a rear-end dust collection device.

As shown in fig. 3, the funnel assembly 17 comprises an upper funnel 4, a middle funnel 7, a bottom funnel 8 and a distribution hopper 10. The upper portion funnel 4 is installed the bottom of discharge hopper assembly 1, upper portion funnel 4, middle funnel 7, bottom funnel 8 and cloth fill 10 connect gradually from the top down, and inside axial communicates with each other. The connection between the funnels is realized through respective flanges, asbestos rubber cloth 5 is arranged between the flanges of every two funnels, and then the funnels are fixed through bolts. The asbestos rubber sheet 5 acts as a vibration damper, thermal insulator and seal, preferably having a thickness of 4-6 mm.

As shown in fig. 9, the bottom funnel 8 is provided with a first flange 8.1 extending radially. The bottom funnel 8 is preferably cast from a refractory alloy, preferably ZG3Cr24Ni7N, ZG4Cr22Ni4N or ZG3Cr18Mn12Si 2N.

As shown in fig. 11, the distribution hopper 10 has a variable diameter rectangular structure with a large upper part and a small lower part. Preferably, it is cast from a high temperature resistant alloy, preferably ZG3Cr24Ni7N, ZG4Cr22Ni4N or ZG3Cr18Mn12Si 2N. The upper rectangular opening is large, the lower rectangular opening is small, and the upper opening and the lower opening are communicated. Preferably, the lower rectangular opening width is only compared to the upper rectangular opening width, preferably 0.4-0.5. A second flange plate 10.1 extending in the radial direction is arranged on the distributing hopper 10, and the first flange plate 8.1 and the second flange plate 10.1 are rectangular.

As shown in fig. 10, a rectangular cavity 9.1 is provided on the supporting frame 9, and as shown in fig. 3, the circular tube of the bottom funnel 8 extends into the rectangular cavity 9.1 to be butted with the distribution hopper 10. The first flange 8.1 is attached to the upper end face of the rectangular cavity 9.1 formed by the support frame 9, and the second flange 10.1 is attached to the lower end face of the rectangular cavity 9.1 formed by the support frame 9; the interior of the hopper assembly 17 and the distribution hopper 10 is communicated with the rectangular cavity 9.1. The pipe diameter of bottom funnel 8 is circular, and cloth fill 10 is the rectangle, and the position that links up between them forms sealed passageway, effectively links up through flange dish and rectangle chamber 9.1 enclose the frame laminating back separately.

As shown in fig. 1 and 3, the door opening assembly 18 includes a door opening driving device 2, a door opening pulling device 13 and a door panel 12. As shown in fig. 5, the door opening drive 2 comprises a first drive actuator 2.3, a first lever 2.2, a first bearing block 2.5 and a first counterweight 2.1. As shown in fig. 8, the door opening pull 13 comprises a second lever arm shaft 13.1, a lever arm 13.2 and a connecting cable assembly 19.

The first lever 2.2 is a crank arm with A, B, C three ends, and its B end is hinged with the first bearing seat 2.5 through the second lever arm shaft 13.1, and the first bearing seat 2.5 is installed on the middle funnel 7 of the funnel component 17. The method specifically comprises the following steps: the right end (i.e. the plane end) of the first bearing seat 2.5 is fixed on the support of the middle funnel 7 by adopting a bolt, and the left end (i.e. the peripheral hole end) is installed on the second lever arm shaft 13.1.

The first driving actuator 2.3 is horizontally arranged, one end of the first driving actuator is hinged with the end A of the first lever 2.2, and the other end of the first driving actuator is arranged on the upper hopper 4 of the hopper assembly 17 through a first support 2.4. The first counter weight 2.1 is mounted to the C-end of the first lever 2.2.

The lever arm 13.2 is fixedly sleeved on the second lever arm shaft 13.1 through a second key 13.10, so that the lever arm 13.2 can rotate along with the second lever arm shaft 13.1. One end of the connecting rope assembly 19 is connected with the door panel 12, and the other end is connected with the lever arm 13.2. The door panel 12 is a split type double door structure. As shown in fig. 12, a hanging shaft 12.1 is arranged on one side of the door panel 12, and the hanging shaft 12.1 is hinged to a material distribution opening 15 of the material distribution hopper 10 through a hanging lug 11. The hangers 11 are mounted inside the bottom of the distributing hopper 10 through bolts (as shown in fig. 3), and four hangers are arranged.

The hanger 11 is preferably made of high temperature resistant alloy casting, and preferably ZG3Cr24Ni7N, ZG4Cr22Ni4N or ZG3Cr18Mn12Si 2N. The thickness of the hanging lug is preferably 15-25 mm.

As shown in fig. 12, lifting lugs 12.2 are provided on the door panel 12. The door panel 12 is preferably cast from a high temperature resistant alloy, preferably ZG3Cr24Ni7N, ZG4Cr22Ni4N, or ZG3Cr18Mn12Si 2N. The two lifting lugs 12.2 on the door panel are symmetrically arranged along the length direction of the door panel, and the distance between the lifting lugs 12.2 is preferably 40-50% of the length of the door panel.

As shown in fig. 8, the connecting string assembly 19 includes a first chain 13.5, an ear shaft 13.6, an ear 13.7, a shackle 13.8, and a second chain 13.9. A cover plate 13.3 is arranged on the lever arm 13.2, and the second pin shaft 13.4 penetrates through the cover plate 13.3 and is fixed with the first chain 13.5. The ear 13.7 is connected to the other end of the first chain 13.5 by an ear shaft 13.6. One end of the second chain 13.9 is mounted at the bottom of the lug 13.7 through the shackle 13.8, and the other end of the second chain 13.9 is connected with the lifting lug 12.2 of the door panel 12 through the shackle 13.8. The first chain 13.5 is a thick chain and the second chain 13.9 is a thin chain.

As shown in fig. 7, the top bell assembly 6 comprises a top bell 6.1, a top bell lever arm 6.5 and a first lever arm shaft 6.7. As shown in fig. 3 and 7, the other end of the top bell lever arm 6.5 is hinged to the top bell 6.1, specifically: the top bell shaft 6.4 is perpendicular to the axis of the first lever arm shaft 6.7, two ends of the top bell shaft 6.4 are fixed through a third bearing seat 6.2, and the third bearing seat 6.2 is fixed on the inner surface of the top bell 6.1 through bolts. One end of the top clock lever arm 6.5 is Y-shaped and is fixed in a hole in the middle of the top clock shaft 6.4 through a first pin shaft 6.3, and the other end of the top clock lever arm 6.5 is fixedly provided with the first lever arm shaft 6.7 through a first key 6.6, so that the top clock lever arm 6.5 can rotate along with the first lever arm shaft 6.7. One end of the first lever arm shaft 6.7 is fixed on the second bearing block 3.3, and the other end is fixed on the support of the upper funnel 4 (as shown in fig. 1 and 3).

As shown in fig. 6, the top bell drive 3 includes a second drive actuator 3.2, a second bearing block 3.3, a second lever 3.4, a second support 3.1 and a second counterweight 3.5.

The second lever 3.4 is a crank arm with D, E, F three ends, and the end E is provided with a second bearing seat 3.3. One end of the second driving actuator 3.2 is hinged to the D-end of the second lever 3.4, and the other end is mounted on the middle funnel 7 through a second support 3.1 (as shown in fig. 1). The second counter weight 3.5 is mounted to the F-end of the second lever.

The first driving actuator 2.3 and the second driving actuator 3.2 can adopt any one of an air cylinder, an oil cylinder, an electric push rod and the like. The retraction and extension speed of the first drive actuator 2.3 is preferably relatively slow, using 100 mm/s. The retraction speed of the second driving actuator 3.2 is preferably higher, 200 and 300mm/s are adopted, and the extension speed is preferably lower, 100mm/s is adopted.

As shown in fig. 13, the utility model also provides a metallurgical furnace comprising the top charging device. The metallurgical furnace can realize secondary uniform material distribution: the material is uniformly distributed in the material distributing hopper at the bottom of the furnace top feeding device for the first time, and the material is uniformly distributed again when the whole material falls into the rectangular hearth of the blast furnace for the second time. The material can be prevented from accumulating in the middle of the hearth through secondary material distribution, so that the material is uniformly distributed in the hearth, particularly around the furnace wall, the furnace burden is ensured to be fully contacted and combusted with the oxygen sprayed from the side wall of the hearth, and the furnace is prevented from being dead

As shown in fig. 13, the work flow of the furnace top charging device provided by the utility model is as follows:

the first step is as follows: the bucket is in place and ready to unload (as shown in figure 13 a)

The bottom discharge type charging bucket 100 is dispatched to the upper side of the furnace top feeding device by using a travelling crane and is right opposite to the position of the feeding hole 16, at the moment, the first driving actuator 2.3 is in a completely extending state, the first lever 2.2 is pushed to rotate anticlockwise along with the second lever arm shaft 13.1, the first balance weight 2.1 is lowered to the lowest position, the second lever arm shaft 13.1 drives the lever arm 13.2 to rotate anticlockwise and upwards so as to pull the first chain 13.5 and the second chain 13.9 to be tightened upwards, the lower end of the second chain 13.9 is provided with the shackle 13.8, the shackle 13.8 is arranged in the lifting lug 12.2 on the door plate 12, therefore, the two door plates 12 are in a completely closed and sealed state, and smoke in the closed blast furnace cannot overflow from the door plates. At this time, the door opening assembly 18 is in a fully closed state.

The second driving actuator 3.2 is in a fully retracted state, pulls the second lever 3.4 to rotate clockwise along with the first lever arm shaft 6.7, and puts the second balance weight 3.5 down to the lowest position, and simultaneously, the first lever arm shaft 6.7 drives the top bell lever arm 6.5 to rotate clockwise and upwards, so that the top bell 6.1 seals the blanking port 14 of the upper funnel 4. The top clock assembly 6 is in a fully closed state.

The travelling crane slowly releases the bottom discharge type charging bucket 100 to the discharging hopper assembly 1 of the furnace top feeding device, the bottom discharge type charging bucket 100 compresses the buffer shaft 1.2 downwards, the buffer shaft is in a step shape, the thick end presses the baffle plate 1.3 downwards, the baffle plate 1.3 presses the spring 1.4 downwards, and the releasing of the bottom discharge type charging bucket 100 is buffered.

The second step is that: opening the top bell and discharging the bucket (as shown in FIG. 13 b)

The second driving actuator 3.2 is fully extended to push the second lever 3.4 to rotate counterclockwise along with the first lever arm shaft 6.7, so as to push the second balance weight 3.5 to the highest position, and simultaneously, the first lever arm shaft 6.7 drives the top bell lever arm 6.5 to rotate counterclockwise and downwards, so that the top bell 6.1 leaves the blanking port 14. At this time, the top bell assembly 6 is in a fully open state. Subsequently, the bottom discharge bucket 100 enters from the feed inlet 16 and starts discharging into the top charging device.

In the whole discharging process, negative pressure is kept in the furnace top feeding device, the pressure value is preferably negative 30-50kPa, and dust generated during discharging is connected into the rear-end dust collecting device through the dust collecting pipe 1.7 and the flange 1.8.

In the falling process of the materials, the materials sequentially pass through a cylindrical middle funnel 7 and a cylindrical bottom funnel 8, and are uniformly distributed in a first step in a distribution hopper 10.

The third step: bucket transfer, top clock off (as shown in FIG. 13 c)

After the discharging is finished, the travelling crane lifts and transfers the bottom discharging type charging bucket 100, when the charging bucket is separated from the discharging hopper assembly 1, the second driving actuator 3.2 starts to retract slowly, the second lever 3.4 is pulled to rotate clockwise along with the first lever arm shaft 6.7, the second balance weight 3.5 is placed to the lowest position, and meanwhile, the first lever arm shaft 6.7 drives the top bell lever arm 6.5 to rotate clockwise and upwards, so that the top bell 6.1 seals the discharging port 14 again.

The fourth step: the door was opened and charging commenced (as shown in FIG. 13 d)

Second drive executor 3.2 begins to retract with faster speed, speed should adopt 200mm/s, first lever 2.2 of pulling rotates along with second lever arm axle 13.1 clockwise, draw first counter weight 2.1 to the highest position, drive lever arm 13.2 clockwise downwardly rotating through second lever arm axle 13.1, drive first chain 13.5 and second chain 13.9 and transfer, simultaneously, under the dead weight effect of material gravity and door plant 12, two door plants open rapidly, the material evenly falls into airtight blast furnace, carry out the cloth for the second time. At this time, the door-opening pulling device 13 is in a fully opened state.

The pressure value in the charging device at the top of the furnace is kept negative 30-50kPa during the whole charging process, dust generated during charging and smoke fleed up in the furnace are connected into the rear end dust collecting device through the dust collecting pipe 1.7 and the flange 1.8

The fifth step: addition was complete and the door panel closed (as shown in FIG. 13 e)

After the feeding is finished, the first driving actuator 2.3 begins to slowly extend out at a speed of 100mm/s, the first lever 2.2 is pushed to rotate anticlockwise along with the second lever arm shaft 13.1, the first balance weight 2.1 is placed to the lowest position again, the second lever arm shaft 13.1 drives the lever arm 13.2 to rotate upwards anticlockwise so as to pull the first chain 13.5 and the second chain 13.9 to be tightened upwards, the lower end of the second chain 13.9 is provided with the shackle 13.8, the shackle 13.8 is installed in the lifting lug 12.2 on the door plate 12, and therefore the two door plates 12 are driven to be completely closed.

At this point, one feed sequence ends.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A furnace top feeding device is characterized by comprising a discharging funnel assembly (1), a top bell assembly (6) capable of opening or closing the discharging opening (14), a funnel assembly (17) arranged at the bottom of the discharging funnel assembly (1), a distributing hopper (10) arranged at the bottom of the funnel assembly (17) and a door opening assembly (18) capable of opening or closing the distributing opening (15);

the top of the discharge hopper assembly (1) is provided with a feed inlet (16), and the bottom of the discharge hopper assembly is provided with a blanking port (14); the discharge hopper assembly (1), the hopper assembly (17) and the distribution hopper (10) are axially communicated; the bottom of the material distributing hopper (10) is provided with the material distributing opening (15);

the distributing hopper (10) is of a variable diameter rectangular structure with a large upper part and a small lower part.

2. The furnace top charging device according to claim 1, further comprising a support frame (9), wherein a rectangular cavity (9.1) is formed in the support frame (9), a first flange (8.1) extending in the radial direction is formed at the bottom of the funnel assembly (17), a second flange (10.1) extending in the radial direction is formed on the distribution hopper (10), the first flange (8.1) and the second flange (10.1) are both rectangular, the first flange (8.1) and the support frame (9) form an upper end surface fit of the rectangular cavity (9.1), and the second flange (10.1) and the support frame (9) form a lower end surface fit of the rectangular cavity (9.1); the insides of the hopper assembly (17) and the distributing hopper (10) are communicated with the rectangular cavity (9.1).

3. The top charging installation according to claim 1, in which the door opening assembly (18) comprises a door opening drive (2), a door opening pull (13) and a door panel (12); the door opening driving device (2) comprises a first driving actuator (2.3), a first lever (2.2) and a first bearing seat (2.5); the door opening traction device (13) comprises a second lever arm shaft (13.1), a lever arm (13.2) and a connecting rope assembly (19);

the first lever (2.2) is a crank arm with A, B, C three ends, the B end of the first lever is hinged with the first bearing seat (2.5) through the second lever arm shaft (13.1), and the first bearing seat (2.5) is installed on the funnel component (17); one end of the first driving actuator (2.3) is hinged with the end A of the first lever (2.2), and the other end is arranged on the hopper assembly (17);

the lever arm (13.2) is fixedly sleeved on the second lever arm shaft (13.1), one end of the connecting rope assembly (19) is connected with the door panel (12), and the other end of the connecting rope assembly is connected with the lever arm (13.2); the door plate (12) is arranged on the material distribution opening (15) in an openable and closable manner.

4. The top charging installation according to claim 3, wherein said door panels (12) are of a double-split double door construction.

5. The top charging installation according to claim 3, wherein the door opening drive (2) further comprises a first counterweight (2.1), the first counterweight (2.1) being mounted to the C-end of the first lever (2.2).

6. The top charging installation according to claim 3, wherein the connecting cord assembly (19) comprises a first chain (13.5), an ear shaft (13.6), an ear (13.7), a shackle (13.8) and a second chain (13.9), the lever arm (13.2) being connected to one end of the first chain (13.5), the ear (13.7) being connected to the other end of the first chain (13.5) by the ear shaft (13.6); one end of the second chain (13.9) is installed at the bottom of the lug (13.7) through the shackle (13.8), and the other end of the second chain (13.9) is connected with the door panel (12) through the shackle (13.8).

7. The top charging installation according to claim 1, further comprising top bell actuation means (3) for actuating the top bell assembly switch; the top clock assembly (6) comprises a top clock (6.1), a top clock lever arm (6.5) and a first lever arm shaft (6.7); one end of the top clock lever arm (6.5) is fixedly provided with the first lever arm shaft (6.7), and the other end of the top clock lever arm is hinged with the top clock (6.1);

the top bell driving device (3) comprises a second driving actuator (3.2), a second bearing seat (3.3) and a second lever (3.4);

the second lever (3.4) is a crank arm with D, E, F three ends, the E end of the second lever is provided with a second bearing seat (3.3), one end of the first lever arm shaft (6.7) is connected with the second bearing seat (3.3), and the other end of the first lever arm shaft is arranged on the funnel component (17); one end of the second driving actuator (3.2) is hinged with the D end of the second lever (3.4), and the other end is installed on the hopper assembly (17).

8. The top charging installation according to claim 7, wherein the top bell driving arrangement (3) further comprises a second counterweight (3.5), said second counterweight (3.5) being mounted to the F-end of the second lever.

9. The top charging installation according to claim 1, in which the discharge funnel assembly (1) comprises a discharge funnel (1.1), a mounting base (20), a buffer assembly (21) and a dust collecting tube (1.7), the discharge funnel (1.1) being mounted on the mounting base (20) via the buffer assembly (21), and the buffer assembly (21) being arranged adjacent to the feed opening (16); the dust collecting pipe (1.7) penetrates through the mounting base (20) and is communicated with the interior of the discharge hopper (1.1).

10. A metallurgical furnace comprising a top charging apparatus according to any one of claims 1 to 9.

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