CN116855672A - Continuous production system of electric arc furnace - Google Patents

Abstract

The invention relates to the technical field of steelmaking, in particular to an electric arc furnace continuous production system, which can rapidly guide out flue gas generated in a steelmaking cavity through a flue gas exhaust pipe communicated with the steelmaking cavity, is used for a preheating process in a preamble process after being processed, forms an ascending air flow in a dedusting channel through an exhaust structure arranged at the top of the dedusting channel and an air inlet mechanism arranged at the bottom of the dedusting channel, and can guide out impurities such as dust and the like for uniform recovery processing through the ascending air flow because scrap steel is a scrap steel stack formed in the preamble process. Through setting up the first air inlet mechanism that contains first air inlet machine, first air-supply line and first wind distribution structure, contain second air inlet machine, second air-supply line and second wind distribution structure's second air inlet mechanism, carry out the air supply from dust removal passageway bottom both sides for it is more even that the upward air flow distributes in the dust removal passageway.

Description

Continuous production system of electric arc furnace

Technical Field

The invention relates to the technical field of steelmaking, in particular to a continuous production system of an electric arc furnace.

Background

The steelmaking furnace uses an electric arc furnace more, has the advantages of short flow, high efficiency, environmental protection and the like, and in the steelmaking process of the electric arc furnace, a compressed and molded scrap steel pile is required to be conveyed into the electric arc furnace based on a horizontal feeding device by a pusher, and scrap steel is smelted through high temperature generated by electrode electric arc to form scrap steel, wherein the temperature of an arc area can reach 3000 ℃.

Chinese patent publication No. CN218932205U discloses a primary combustion auxiliary heating electric arc furnace steelmaking apparatus, which provides an electric arc furnace steelmaking apparatus capable of rapidly cooling an electrode body, but cannot well treat the problems of flue gas generated by an electric arc furnace, and directly discharging the flue gas is an environmental problem, and on the other hand, wastes a large amount of heat energy.

Chinese patent publication No. CN216864224U discloses a horizontal continuous feeding device for preheating scrap steel of electric furnace, which preheats the scrap steel to be steelmaking through the flue gas generated by the electric arc furnace, but in the whole process, the preamble process and the dust removal treatment are performed, the flue gas is directly led in to enable the scrap steel to absorb a certain amount of impurities such as smoke dust again, and the impurities are conveyed into the electric arc furnace again, so that the configuration of auxiliary materials during steelmaking of the electric arc furnace is affected, and the steelmaking quality is affected to a certain extent.

Chinese patent publication No. CN2906510 discloses a horizontal continuous feeding scrap preheating device for electric arc steelmaking furnace, which preheats the scrap to be steelmaking by flue gas, but in actual production, because most scrap to be steelmaking is recycled steel products, and is piled up in compression molding process for a long time, there are certain impurities such as dust and stone in scrap pile, and this part affects the configuration of lime, dolomite, carbon powder, etc. in electric arc furnace steelmaking, and affects steelmaking quality to a certain extent.

Chinese patent publication No. CN204255095U discloses a charging car for a steelmaking electric furnace, which directly charges from above the furnace chamber of the electric furnace through the charging car, wherein the preheating dust removal and other treatments cannot be performed on the scrap raw materials.

Disclosure of Invention

The present invention addresses the above problems by providing an electric arc furnace continuous production system.

The technical scheme adopted is that the electric arc furnace continuous production system comprises an electric arc furnace body, a horizontal feeding device, a scrap steel dust removing device and a feeding preheating device, wherein an electrode rod is inserted into the top of the electric arc furnace body, one end of the electrode rod is connected with a power transmission line, an electric arc furnace feeding port is arranged on one side of the electric arc furnace body and communicated with the preheating device through the electric arc furnace feeding port, an auxiliary material adding mechanism and a flue gas exhaust pipe are arranged at the top of the electric arc furnace body, a steelmaking cavity is arranged in the electric arc furnace body, a blanking net is arranged at the lower part of the steelmaking cavity, and a blanking pipe is arranged at the bottom of the steelmaking cavity;

the horizontal feeding device comprises a conveying groove, wherein waste steel storage tables are arranged on two sides of the conveying groove, one end of the conveying groove is connected with the dust removing device, a pushing mechanism is arranged at the other end of the conveying groove, waste steel in the conveying groove can be pushed into the dust removing device by the pushing mechanism, a damping mechanism is arranged between the conveying groove and the waste steel storage tables, a transferring mechanism is arranged on the waste steel storage tables, and the transferring mechanism can transfer waste steel on the waste steel storage tables into the conveying groove;

The waste steel dust removing device comprises a dust removing channel, one end of the dust removing channel is communicated with the conveying groove, the other end of the dust removing channel is communicated with the buffer tube, an exhaust structure is arranged at the top of the dust removing channel, an air inlet mechanism is connected to the bottom of the dust removing channel, and air flow entering the dust removing channel from the air inlet mechanism can be discharged from the exhaust structure;

the feeding preheating device comprises a preheating channel, the preheating channel is communicated with a buffer tube, the other end of the preheating channel is communicated with a feed inlet of the electric arc furnace, a preheating cavity is formed in the preheating channel, a preheating air inlet mechanism and a preheating air outlet mechanism are arranged on the preheating channel, a preheating tube is arranged in a preheating channel interlayer, the preheating air inlet mechanism is close to the feed inlet of the electric arc furnace along the conveying direction of scrap steel in the preheating channel, the preheating air inlet mechanism is communicated with a tail gas conveying tube after dust removal, the preheating air outlet mechanism is close to the buffer tube, and the heating air outlet mechanism is communicated with a tail gas exhaust pipe after dust removal.

Further, auxiliary material adding mechanism includes auxiliary material batching jar and auxiliary material adding pipe, auxiliary material batching jar and lime feed bin, carbon ball feed bin, magnesium ball feed bin intercommunication, auxiliary material batching jar bottom discharge gate is through auxiliary material adding pipe and electric arc furnace body top intercommunication.

Optionally, one end of the flue gas exhaust pipe is communicated with the top of the electric arc furnace body, the other end of the flue gas exhaust pipe is communicated with the air inlet end of the bag-type dust removing box, and the air outlet end of the bag-type dust removing box is communicated with the air conveying mechanism.

Optionally, the air conveying mechanism comprises an air conveying branch pipe, an air conveying main pipe and a tail gas conveying pipe after dust removal, wherein the air conveying branch pipe is communicated with the air conveying main pipe, one end of the tail gas conveying pipe after dust removal is communicated with the air conveying main pipe, the other end of the tail gas conveying pipe is communicated with the preheating device, and the tail gas conveying pipe after dust removal is positioned behind the air conveying branch pipe along the gas flow direction in the air conveying main pipe.

Further, an oxygenation gun is arranged on the inner wall of the electric arc furnace body.

Optionally, the bottom of the electric arc furnace body protrudes towards one side to form an arc surface, and the discharging pipe is arranged at the arc surface.

Further, the exhaust structure comprises an exhaust pipe and an exhaust branch pipe, wherein the exhaust pipe is arranged above the dust removal channel, one end of the exhaust branch pipe is communicated with the top of the dust removal channel, and the other end of the exhaust branch pipe is communicated with the exhaust pipe.

Optionally, the exhaust structure includes many exhaust branch pipes, many exhaust branch pipes are the same interval setting, and exhaust branch pipe vertical projection is located exhaust pipe vertical projection below.

Optionally, the air inlet mechanism includes a first air inlet mechanism and a second air inlet mechanism, and the first air inlet mechanism and the second air inlet mechanism are respectively arranged at two sides of the dust removal channel.

Further, the first air inlet mechanism comprises a first air inlet machine, a first air inlet pipe and a first air distribution structure, the first air distribution structure is arranged in the dust removal channel and is positioned at the bottom of the dust removal channel, one end of the first air inlet pipe is connected with the air outlet end of the first air inlet machine, and the other end of the first air inlet pipe is connected with the first air distribution structure;

the second air inlet mechanism comprises a second air inlet machine, a second air inlet pipe and a second air distribution structure, wherein the second air distribution structure is arranged in the dust collection channel and is arranged at the bottom of the dust collection channel opposite to the first air distribution structure, one end of the second air inlet pipe is connected with the air outlet end of the second air inlet machine, and the other end of the second air inlet pipe is connected with the second air distribution structure.

Optionally, the first air distribution structure and the second air distribution structure have the same structure.

Further, the first air distribution structure comprises symmetrically arranged fixing plates, air distribution grooves are formed between the symmetrically arranged fixing plates, air distribution openings are formed in the bottoms of the air distribution grooves, and the air distribution openings are communicated with the first air inlet pipe.

Optionally, a screen is arranged in the air distribution groove.

Further, one end of the fixing plate along the dust removing channel is an inclined plane.

Further, preheat air inlet mechanism and include first solid fixed ring, air inlet unit and first spacing part, first solid fixed ring and dust removal back tail gas transfer pipe intercommunication are provided with the air current passageway in the first solid fixed ring, and air current passageway and air inlet unit intercommunication, and first solid fixed ring locates and preheats the passageway periphery, and air inlet unit can preheat the passageway, and first spacing part is with first solid fixed ring and preheat the passageway and be connected.

Optionally, the preheating air outlet mechanism comprises a second fixed ring, an air outlet part and a second limiting part, wherein the second fixed ring is communicated with the tail gas exhaust pipe after dust removal, an air flow channel is arranged in the second fixed ring and is communicated with the air outlet part, the second fixed ring is arranged on the periphery of the preheating channel, the air outlet part can lead out preheated gas from the preheating channel, and the second limiting part is used for connecting the second fixed ring with the preheating channel.

Optionally, the air inlet part comprises a first air inlet pipe, a second air inlet pipe, a third air inlet pipe and a fourth air inlet pipe, and the air outlet part comprises a first air outlet pipe, a second air outlet pipe, a third air outlet pipe and a fourth air outlet pipe.

Further, one end of the first air inlet pipe is communicated with the internal air flow channel of the first fixed ring, the other end of the first air inlet pipe is inserted into the preheating channel from the top and is communicated with a first preheating pipe arranged in an interlayer at the top of the preheating channel, one end of the second air inlet pipe is inserted into the preheating channel from the side and is communicated with a second preheating pipe arranged in an interlayer at the side of the preheating channel, one end of the third air inlet pipe is communicated with the internal air flow channel of the first fixed ring, the other end of the third air inlet pipe is inserted into the preheating channel from the side and is communicated with a third preheating pipe arranged in an interlayer at the side of the preheating channel, the third preheating pipe and the second preheating pipe are oppositely arranged, one end of the fourth air inlet pipe is communicated with the internal air flow channel of the first fixed ring, and the other end of the fourth air inlet pipe is inserted into the preheating channel from the bottom and is communicated with a fourth preheating pipe arranged in an interlayer at the bottom of the preheating channel;

One end of the first air outlet pipe is communicated with the internal air flow channel of the second fixed ring, the other end of the first air outlet pipe is inserted into the preheating channel from the top and is communicated with the first preheating pipe arranged in the interlayer at the top of the preheating channel, one end of the second air outlet pipe is inserted into the preheating channel from the side and is communicated with the second preheating pipe arranged in the interlayer at the side of the preheating channel, one end of the third air outlet pipe is communicated with the internal air flow channel of the second fixed ring, the other end of the third air outlet pipe is inserted into the preheating channel from the side and is communicated with the third preheating pipe arranged in the interlayer at the side of the preheating channel, the third preheating pipe and the second preheating pipe are oppositely arranged, one end of the fourth air outlet pipe is communicated with the internal air flow channel of the second fixed ring, and the other end of the fourth air outlet pipe is inserted into the preheating channel from the bottom and is communicated with the fourth pipe arranged in the interlayer at the bottom of the preheating channel.

Optionally, the first limiting component and the second limiting component both comprise an upper limiting hook and a lower limiting hook, one end of the upper limiting hook in the first limiting component is sleeved on the first fixing ring, and the other end of the upper limiting hook is connected with the top of the preheating channel;

one end of a lower limit hook in the first limit part is sleeved on the first fixed ring, and the other end of the lower limit hook is connected with the bottom of the preheating channel;

One end of an upper limit hook in the second limit part is sleeved on the first fixed ring, and the other end of the upper limit hook is connected with the top of the preheating channel;

one end of a lower limiting hook in the second limiting part is sleeved on the first fixing ring, and the other end of the lower limiting hook is connected with the bottom of the preheating channel.

Further, the scrap steel on the scrap steel storage table is located above the conveying trough in the vertical direction.

Optionally, damper includes first shock attenuation board and second shock attenuation board, and the top of first shock attenuation board is located to the second shock attenuation board, and second shock attenuation board one end is connected with the steel scrap storage table, and second shock attenuation board bottom passes through the connecting rod to be connected with first shock attenuation board, and first shock attenuation board one end is connected with the conveying groove top.

Optionally, the first shock absorbing plate and the second shock absorbing plate are both obliquely arranged.

Further, the transfer mechanism comprises a supporting rod, a cross rod and a sucker component, the cross rod is erected above the conveying groove, two ends of the cross rod are respectively connected with the supporting rod, the supporting rod is arranged on a fixing frame, and the fixing frame is located on one side, far away from the conveying groove, of the scrap steel storage table.

The beneficial effects of the invention at least comprise one of the following;

1. the flue gas generated in the steelmaking cavity can be rapidly guided out through the flue gas exhaust pipe communicated with the steelmaking cavity, and the flue gas is used for a preheating process in the prior process after being treated.

2. Through setting up the auxiliary material adding mechanism with steelmaking chamber intercommunication, in carrying out steelmaking process, through adding the mixed auxiliary material powder after the compatibility to steelmaking intracavity.

3. Through setting up the unloading net that is located steelmaking chamber to set up simultaneously on the unloading pipe, can block scrap steel and other jumbo size impurity that are not full electric arc molten solid, avoid it to appear piling up in unloading pipe department.

4. Through the exhaust structure of setting at dust removal passageway top, the air inlet mechanism of dust removal passageway bottom for form an ascending air current in dust removal passageway, because the steel scrap is fashioned steel scrap buttress under the preceding process, have more gaps wherein, can export impurity such as dust through ascending air current and unify recovery processing.

5. Through setting up the first air inlet mechanism that contains first air inlet machine, first air-supply line and first wind distribution structure, contain second air inlet machine, second air-supply line and second wind distribution structure's second air inlet mechanism, carry out the air supply from dust removal passageway bottom both sides for it is more even that the upward air flow distributes in the dust removal passageway.

6. Through the arrangement of the preheating channel with the interlayer, high-temperature flue gas led out from the electric arc furnace can enter the preheating pipe in the interlayer of the preheating channel from the preheating air inlet mechanism, preheat the scrap steel in the preheating channel, and finally be discharged from the preheating air outlet mechanism, so that the direct contact between the flue gas and the scrap steel is avoided, and the dust removal meaning in the preamble process is ensured to a great extent.

7. The utility model provides a two dimension carry out reinforced steel scrap horizontal feeding device, one dimension is steel scrap from steel scrap storage bench transport to the conveyer trough through damper, and another dimension is through the transfer mechanism who sets up, transfers steel scrap to the conveyer trough in, carries towards the steelmaking stove through advancing mechanism again

Drawings

FIG. 1 is a schematic view of an arc furnace;

FIG. 2 is a schematic view of an arc furnace with a top view;

FIG. 3 is a schematic diagram of a flue gas exhaust pipe connection structure;

FIG. 4 is a schematic view of a horizontal feeding device;

FIG. 5 is a schematic view of the end structure of the horizontal feeding device;

FIG. 6 is a schematic diagram of a scrap steel dust removal device;

FIG. 7 is a schematic diagram of an end structure of a scrap dust removal device;

FIG. 8 is a schematic side view of a dust removal channel;

FIG. 9 is a schematic diagram of a first wind distribution structure;

FIG. 10 is a schematic diagram of a feed preheater arrangement;

FIG. 11 is a schematic view of the internal structure of the feed preheater;

FIG. 12 is a schematic diagram of a preheating air intake mechanism;

FIG. 13 is a schematic diagram of a pre-heated air outlet mechanism;

wherein the reference numerals: the electric arc furnace comprises a propelling motor 1, a push plate 2, a first shock absorbing plate 3, a second shock absorbing plate 4, a fixing frame 5, a supporting rod 6, a sucker component 7, a telescopic rod 8, a push plate 9, a conveying groove 10, a cross rod 11, a scrap steel storage table 12, scrap steel 13, a dedusting channel 20, an exhaust pipe 21, a first air inlet fan 22, a second air inlet fan 23, a first air inlet pipe 24, a second air inlet pipe 25, a reinforcing rib 26, an exhaust branch pipe 27, a first air distribution structure 28, a second air distribution structure 29, a fixed plate 30, an air distribution groove 31, a screen mesh 32, an air distribution opening 40, a preheating channel 41, a first fixed ring 42, a second fixed ring 43, a second air inlet pipe 24, a first electric arc furnace feeding port and a second fixed ring 42 the device comprises a buffer tube 44, an upper limit hook 45, a lower limit hook 46, a dedusting tail gas delivery pipe 47, a first air inlet pipe 48, a second air inlet pipe 49, a third air inlet pipe 50, a fourth air inlet pipe 51, a first air outlet pipe 52, a second air outlet pipe 53, a third air outlet pipe 54, a fourth air outlet pipe 55, a dedusting tail gas exhaust pipe 56, a first preheating pipe 57, a preheating cavity 58, an electric arc furnace body 60, a steelmaking cavity 61, an electrode rod 62, a flue gas exhaust pipe 63, a power transmission line 64, an auxiliary material adding pipe 65, an auxiliary material preparing tank 66, molten steel 67, a blanking net 68, a blanking pipe 69, an oxygenation gun 70, a cloth bag type dust removing box 71, a wind delivery branch pipe 72 and a wind delivery main pipe 73.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

As shown in fig. 1 to 13, an electric arc furnace continuous production system comprises an electric arc furnace body 60, a horizontal feeding device, a scrap dust removal device and a feeding preheating device, wherein an electrode rod 62 is inserted into the top of the electric arc furnace body 60, one end of the electrode rod 62 is connected with a power transmission line 64, one side of the electric arc furnace body 60 is provided with an electric arc furnace feed inlet 41 and is communicated with the preheating device through the electric arc furnace feed inlet 41, the top of the electric arc furnace body 60 is provided with an auxiliary material adding mechanism and a flue gas exhaust pipe 63, a steelmaking cavity 61 is arranged in the electric arc furnace body 60, a blanking net 68 is arranged at the lower part of the steelmaking cavity 61, and a blanking pipe 69 is arranged at the bottom of the steelmaking cavity 61;

The horizontal feeding device comprises a conveying groove 10, wherein waste steel storage tables 12 are arranged on two sides of the conveying groove 10, one end of the conveying groove 10 is connected with a dust removing device, a pushing mechanism is arranged at the other end of the conveying groove 10 and can push waste steel 13 in the conveying groove 10 into the dust removing device, a damping mechanism is arranged between the conveying groove 10 and the waste steel storage tables 12, a transferring mechanism is arranged on the waste steel storage tables 12 and can transfer the waste steel 13 on the waste steel storage tables 12 into the conveying groove 10;

the steel scrap dust removing device comprises a dust removing channel 20, one end of the dust removing channel 20 is communicated with a conveying groove 10, the other end of the dust removing channel 20 is communicated with a buffer tube 44, an exhaust structure is arranged at the top of the dust removing channel 20, an air inlet mechanism is connected to the bottom of the dust removing channel 20, and air flow entering the dust removing channel 20 through the air inlet mechanism can be discharged from the exhaust structure;

the feeding preheating device comprises a preheating channel 40, the preheating channel 40 is communicated with a buffer tube 44, the other end of the preheating channel 40 is communicated with an electric arc furnace feed inlet 41, a preheating cavity 58 is arranged in the preheating channel 40, a preheating air inlet mechanism and a preheating air outlet mechanism are arranged on the preheating channel 40, a preheating tube is arranged in an interlayer of the preheating channel 40, the preheating air inlet mechanism is close to the electric arc furnace feed inlet 41 along the conveying direction of scrap steel in the preheating channel 40, the preheating air inlet mechanism is communicated with a dust-removing tail gas air conveying tube 47, the preheating air outlet mechanism is close to the buffer tube 44, and the hot air outlet mechanism is communicated with a dust-removing tail gas exhaust tube 56.

The purpose of design like this is, export the flue gas that produces in the steelmaking chamber through setting up the flue gas blast pipe that communicates with steelmaking chamber, supplies the preheating process in the preceding technology to use after the processing. Through setting up the auxiliary material adding mechanism with steelmaking chamber intercommunication, in carrying out steelmaking process, through adding the mixed auxiliary material powder after the compatibility to steelmaking intracavity. Through setting up the unloading net that is located steelmaking chamber to set up simultaneously on the unloading pipe, can block scrap steel and other jumbo size impurity that incomplete electric arc melted the solid, avoid it to appear piling up in unloading pipe department, can promote the overall utilization rate of flue gas to a great extent.

It should be noted that, because the temperature in the steelmaking chamber is higher, most of the used blanking nets are ceramic or other refractory materials to prepare the blanking screen structure capable of resisting high temperature.

Through the arrangement of the preheating channel with the interlayer, high-temperature flue gas led out from the electric arc furnace can enter the preheating pipe in the interlayer of the preheating channel from the preheating air inlet mechanism, preheat the scrap steel in the preheating channel, and finally be discharged from the preheating air outlet mechanism, so that the direct contact between the flue gas and the scrap steel is avoided, and the dust removal meaning in the preamble process is ensured to a great extent. The preheating flue gas guiding direction opposite to the conveying direction of the scrap steel in the preheating channel is adopted, so that convection of one temperature can be formed to a certain extent, and the preheating efficiency is improved.

It is to be noted that the present embodiment is mainly directed to the improvement of the scrap preheating section, and the scrap conveying section may refer to the prior art, using conveying rollers or conveying belts to convey toward the arc furnace.

Through the exhaust structure of setting at dust removal passageway top, the air inlet mechanism of dust removal passageway bottom for form an ascending air current in dust removal passageway, because the steel scrap is fashioned steel scrap buttress under the preceding process, have more gaps wherein, can export impurity such as dust through ascending air current and unify recovery processing.

The horizontal feeding device solves the problems that in actual production, most of steel products are recycled as steel scraps in steelmaking are piled up in a compression molding process for a long time, so that certain impurities such as dust, stones and the like exist in a steel scraps stack, and the arrangement of lime, dolomite, carbon powder and the like can be influenced in electric arc furnace steelmaking to a certain extent, so that the steelmaking quality is influenced.

The utility model provides a steel scrap horizontal feeding device that two dimensions carried out reinforced, one of them dimension is that the steel scrap is carried to the conveyer trough from steel scrap storage bench via damper, and another dimension is that through the transfer mechanism who sets up, transfers the steel scrap to the conveyer trough in, carries towards the steelmaking stove through advancing mechanism again.

Meanwhile, in the embodiment, the auxiliary material adding mechanism comprises an auxiliary material preparing tank 66 and an auxiliary material adding pipe 65, the auxiliary material preparing tank 66 is communicated with a lime bin, a carbon ball bin and a magnesium ball bin, and a discharge hole at the bottom of the auxiliary material preparing tank 66 is communicated with the top of the electric arc furnace body 60 through the auxiliary material adding pipe 65.

The purpose of design like this is that can carry out the compatibility with the required auxiliary material of electric arc furnace steelmaking through the auxiliary material batching jar that sets up, in wherein mix evenly the back in the electric arc furnace that adds together, also can add one or more auxiliary material in proper order in the electric arc furnace through auxiliary material batching jar in a part of service scenario.

In this embodiment, one end of the flue gas exhaust pipe 63 is communicated with the top of the electric arc furnace body 60, the other end is communicated with the air inlet end of the bag-type dust removing box 71, the air outlet end of the bag-type dust removing box 71 is communicated with an air conveying mechanism, the air conveying mechanism comprises an air conveying branch pipe 72, an air conveying main pipe 73 and a dust-removed tail gas air conveying pipe 47, the air conveying branch pipe 72 is communicated with the air conveying main pipe 73, one end of the dust-removed tail gas air conveying pipe 47 is communicated with the air conveying main pipe 73, the other end of the dust-removed tail gas air conveying pipe is communicated with the preheating device, and the dust-removed tail gas air conveying pipe 47 is located behind the air conveying branch pipe 72 along the air flow direction in the air conveying main pipe 73.

The purpose of design like this is, in leading into the sack dust removal incasement with the flue gas that produces when electric arc furnace body steelmaking through the flue gas blast pipe, and a plurality of sack dust removal cases set up side by side according to specific processing demand and form a dust removal subassembly, accomplish the dust removal through this dust removal subassembly and make it reach the environmental protection requirement of emission.

Meanwhile, the temperature of the whole flue gas is greatly reduced after dust removal, and the temperature is often kept at 600 ℃ and can be used for preheating a scrap steel stack in a preheating process.

In actual use, a large air delivery main pipe is connected with the dust removal tail gas air delivery pipe, one part of filtered smoke in the air delivery main pipe is used for preheating through the dust removal tail gas air delivery pipe, and the other part of filtered smoke is used for other processes or is discharged after reaching the discharge standard through inspection.

In this embodiment, an oxygen lance 70 is provided on the inner wall of the electric arc furnace body 60.

The design aims at realizing oxygen blowing during steelmaking through the arranged oxygenation gun and improving the integral steelmaking efficiency.

In this embodiment, the bottom of the electric arc furnace body 60 protrudes toward one side to form an arc surface, and the blanking pipe 69 is disposed at the arc surface.

Meanwhile, in this embodiment, the scrap steel 13 on the scrap steel storage table 12 is located above the conveying trough 10 in the vertical direction, the damping mechanism comprises a first damping plate 3 and a second damping plate 4, the second damping plate 4 is arranged above the first damping plate 3, one end of the second damping plate 4 is connected with the scrap steel storage table 12, the bottom of the second damping plate 4 is connected with the first damping plate 3 through a connecting rod, one end of the first damping plate 4 is connected with the top of the conveying trough 10, the first damping plate 3 and the second damping plate 4 are all obliquely arranged, and the inclination angle of the first damping plate 3 in the horizontal direction is smaller than that of the second damping plate 4 in the horizontal direction.

The purpose of this design is through setting up the damper that contains first shock attenuation board, second shock attenuation board for can carry out effectual shock attenuation when steel scrap falls to the conveyer trough from steel scrap storage bench, reduce the impact to the conveyer trough.

It should be noted that, in order to be convenient for in pushing the steel scrap on the steel scrap storage table to damper under the normal circumstances, consequently still be provided with the promotion structure that comprises push plate 9 and telescopic link 8 on the steel scrap storage table, the steel scrap after carrying out compression molding is placed on the steel scrap storage table through transportation parts such as conveyer belt, driving, and the telescopic link drives push plate 9 motion under the control of motor for the steel scrap moves towards damper and finally gets into the conveyer trough.

Meanwhile, in order to push the scrap steel better, the push plate 9 can be arranged into an arc shape or one end of the push plate is bent, so that the scrap steel is not easy to fall off from the push plate when pushing.

It should be noted that the propulsion mechanism used in this embodiment includes a propulsion motor 1, a push plate 2 and a push rod, the push plate 2 is disposed at an end of the conveying trough 10, and is connected to a power output end of the propulsion motor 1 through the push rod, and in use, the propulsion motor 1 can push the push plate 2 toward the dust removing device through the push rod, so as to drive the scrap steel in the conveying trough 10 to move together.

In addition, in the embodiment, the shock pads are arranged on the upper surfaces of the first shock absorbing plate and the second shock absorbing plate, so that collision when the scrap steel falls can be reduced.

In this embodiment, the transportation mechanism includes bracing piece 6, horizontal pole 11 and sucking disc part 7, and horizontal pole 11 erects in the top of conveyer trough 10, and horizontal pole 11 both ends are connected with bracing piece 6 respectively, and bracing piece 6 sets up on mount 5, and mount 5 is located the one side that scrap steel storage table 12 kept away from conveyer trough 10.

The purpose of this design is that through the sucking disc part that sets up can be with pushing away the steel scrap that the pushing structure that comprises push plate 9 and telescopic link 8 can not promote.

It should be noted that the suction cup member 7 used in the present embodiment is an existing electromagnetic suction cup, and the specific structure thereof can be referred to in chinese patent publication No. CN215854558U, and the main function thereof is based on the magnetic field generated by energizing, so as to absorb and carry out the transportation of the scrap steel.

Meanwhile, in actual use, aiming at the dispatching components, the components such as a stepping motor, a lifting rope and the like are inevitably used, so that the sucker component can move to a designated position, the specific setting mode can refer to the Chinese patent with the publication number of CN207120230U, the stepping motor is arranged on the cross rod 11 under normal conditions, the stepping motor drives the screw rod to rotate, a movable seat matched with the position of the electromagnetic sucker is arranged on the screw rod, meanwhile, a motor for controlling the lifting rope to move up and down is also arranged on the movable seat, the lifting rope is connected with the electromagnetic sucker, and a magnetic field capable of adsorbing waste steel is generated after the electromagnetic sucker is electrified.

It should be noted that the fixing frame 5 is provided at the periphery of the scrap box receptacle 12, for providing a base for the supporting rod 6, while the top of the fixing frame 5 is located above the top of the scrap box receptacle 12.

Meanwhile, in this embodiment, the exhaust structure includes exhaust pipe 21 and exhaust branch pipe 27, exhaust pipe 21 locates dust removal passageway 20 top, exhaust branch pipe 27 one end and dust removal passageway 20 top intercommunication, exhaust branch pipe 27 other end and exhaust pipe 21 intercommunication, exhaust structure includes many exhaust branch pipes 27, many exhaust branch pipe 27 the same interval sets up, and the vertical projection of exhaust branch pipe 27 is located exhaust pipe 21 vertical projection below.

It should be noted that, in actual use, in order to secure the overall mechanical strength of the dust removal channel, the reinforcing ribs 26 are provided on the outer periphery of the dust removal channel.

And divide into the multistage with dust removal passageway through strengthening rib 26, every section all sets up exhaust branch pipe and air inlet mechanism, can all form comparatively independent updraft like this at every section, improves whole dust removal efficiency.

Meanwhile, in this embodiment, the air inlet mechanism includes a first air inlet mechanism and a second air inlet mechanism, and the first air inlet mechanism and the second air inlet mechanism are respectively disposed at two sides of the dust collecting channel 20, the first air inlet mechanism includes a first air inlet fan 22, a first air inlet pipe 24 and a first air distribution structure 28, the first air distribution structure 28 is disposed in the dust collecting channel 20 and is located at the bottom of the dust collecting channel 20, one end of the first air inlet pipe 24 is connected with an air outlet end of the first air inlet fan 22, and the other end of the first air inlet pipe 24 is connected with the first air distribution structure 28;

The second air inlet mechanism comprises a second air inlet fan 23, a second air inlet pipe 25 and a second air distribution structure 29, the second air distribution structure 29 is arranged in the dust removal channel 20 and is arranged at the bottom of the dust removal channel 20 opposite to the first air distribution structure 28, one end of the second air inlet pipe 25 is connected with the air outlet end of the second air inlet fan 23, and the other end of the second air inlet pipe 25 is connected with the second air distribution structure 29.

The purpose of design like this is through setting up the first air inlet mechanism that contains first air inlet machine, first air-supply line and first wind distribution structure, contains the second air inlet machine of second air inlet machine, second air-supply line and second wind distribution structure, supplies air from dust removal passageway bottom both sides for it is more even that the upward air flow distributes in the dust removal passageway.

In this embodiment, the first air distribution structure 28 and the second air distribution structure 29 have the same structure, the first air distribution structure 28 includes symmetrically arranged fixing plates 30, and symmetrically arranged air distribution grooves 31 are arranged between the fixing plates 30, air distribution openings 33 are arranged at the bottoms of the air distribution grooves 31, the air distribution openings 33 are communicated with the first air inlet pipe 24, a screen 32 is arranged in the air distribution grooves 31, and one ends of the fixing plates 30 along the dust removal channel 20 are inclined planes.

The purpose of design like this is that setting up first wind distribution structure and the second wind distribution structure of special structure, both can protect the wind gap, can jack up the steel scrap buttress slightly again for the air current is more easy to upwards pass from steel scrap pile bottom.

It is pointed out that in the wind distribution structure, the fixed plate that the symmetry set up is the metal material, and its one end is the inclined plane, and the steel scrap buttress can be along the inclined plane upward movement like this under pushing mechanism's effect, with the slight jack-up of steel scrap buttress, then continue to remove forward, remove to the horizontal segment of fixed plate, the wind gap that sets up can upwards rise the air current, owing to be provided with the screen cloth in the wind distribution groove, can block the debris that can't be influenced by the ascending air current with stone etc. in the steel scrap buttress to avoid the wind gap to block up.

Meanwhile, in this embodiment, the preheating air inlet mechanism includes a first fixing ring 42, an air inlet component and a first limiting component, the first fixing ring 42 is communicated with a tail gas air pipe 47 after dust removal, an air flow channel is arranged in the first fixing ring 42 and is communicated with the air inlet component, the first fixing ring 42 is arranged at the periphery of the preheating channel 40, the air inlet component can preheat the preheating channel 40, the first limiting component connects the first fixing ring 42 with the preheating channel 40, the preheating air outlet mechanism includes a second fixing ring 43, an air outlet component and a second limiting component, the second fixing ring 43 is communicated with a tail gas exhaust pipe 56 after dust removal, the second fixing ring 43 is internally provided with an air flow channel which is communicated with the air outlet component, the second fixing ring 43 is arranged at the periphery of the preheating channel 40, the air outlet component can guide preheated gas out of the preheating channel 40, and the second limiting component connects the second fixing ring 43 with the preheating channel 40.

The purpose of design like this is through setting up annular solid fixed ring to carry out import and export with the flue gas through solid fixed ring, be connected gas-supply pipeline and preheating tube than direct, holistic air current is gentler and evenly distributed, makes whole preheating channel can realize evenly being heated, and the too big difference in temperature can not appear in top, side and bottom.

In this embodiment, the air intake part includes a first air intake pipe 48, a second air intake pipe 49, a third air intake pipe 50 and a fourth air intake pipe 51, the air intake part includes a first air intake pipe 52, a second air intake pipe 53, a third air intake pipe 54 and a fourth air intake pipe 55, one end of the first air intake pipe 48 is communicated with the internal air flow passage of the first fixing ring 42, the other end is inserted into the preheating passage 40 from the top and communicated with a first preheating pipe 57 provided in the top interlayer of the preheating passage 40, one end of the second air intake pipe 49 is inserted into the preheating passage 40 from the side and communicated with a second preheating pipe provided in the side interlayer of the preheating passage 40, one end of the third air intake pipe 50 is inserted into the preheating passage 40 from the side and communicated with a third preheating pipe provided in the side interlayer of the preheating passage 40, and the third pipe and the second preheating pipe are arranged opposite to each other, one end of the fourth air intake pipe 51 is inserted into the preheating passage 40 from the bottom and communicated with a fourth preheating pipe provided in the bottom interlayer of the preheating passage 40;

One end of the first air outlet pipe 52 is communicated with the internal air flow channel of the second fixed ring 43, the other end is inserted into the preheating channel 40 from the top and communicated with the first preheating pipe 57 arranged in the interlayer at the top of the preheating channel 40, one end of the second air outlet pipe 53 is communicated with the internal air flow channel of the second fixed ring 43, the other end is inserted into the preheating channel 40 from the side and communicated with the second preheating pipe arranged in the interlayer at the side of the preheating channel 40, one end of the third air outlet pipe 54 is communicated with the internal air flow channel of the second fixed ring 43, the other end is inserted into the preheating channel 40 from the side and communicated with the third preheating pipe arranged in the interlayer at the side of the preheating channel 40, the third preheating pipe and the second preheating pipe are oppositely arranged, and one end of the fourth air outlet pipe 55 is communicated with the internal air flow channel of the second fixed ring 43, and the other end is inserted into the preheating channel 40 from the bottom and communicated with the fourth preheating pipe arranged in the interlayer at the bottom of the preheating channel 40.

The purpose of this design is that the high temperature flue gas from the dust-removed tail gas delivery pipe 47 to the first fixing ring 42 enters the corresponding preheating pipes from the first air inlet pipe 48, the second air inlet pipe 49, the third air inlet pipe 50 and the fourth air inlet pipe 51 along the air flow passage in the first fixing ring.

In practical use, the preheating pipe is generally arranged in a serpentine shape, so that the residence time of high-temperature flue gas in the pipeline can be increased, and finally the high-temperature flue gas enters the second fixing ring from the first air outlet pipe 52, the second air outlet pipe 53, the third air outlet pipe 54 and the fourth air outlet pipe 55 and is discharged through the tail gas exhaust pipe after dust removal.

In this embodiment, the first limiting component and the second limiting component both include an upper limiting hook 45 and a lower limiting hook 46, one end of the upper limiting hook 45 in the first limiting component is sleeved on the first fixing ring 42, and the other end is connected with the top of the preheating channel 40;

one end of a lower limit hook 45 in the first limit part is sleeved on the first fixed ring 42, and the other end is connected with the bottom of the preheating channel 40;

one end of an upper limit hook 45 in the second limit part is sleeved on the first fixed ring 42, and the other end is connected with the top of the preheating channel 40;

one end of a lower limit hook 45 in the second limit part is sleeved on the first fixed ring 42, and the other end is connected with the bottom of the preheating channel 40.

The aim of this design is to fix the first and second fixing rings on the preheating channel by providing an upper and a lower limit hook.

Finally, it should be noted that: the foregoing description of the preferred embodiments of the present invention is not intended to be limiting, but rather, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the present invention can be modified or equivalents can be substituted for some of the features thereof, and any modification, equivalent substitution, improvement or the like that is within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides an electric arc furnace continuous production system, includes electric arc furnace body (60), horizontal feeding device, steel scrap dust collector and reinforced preheating device, its characterized in that, electrode bar (62) has been inserted at electric arc furnace body (60) top, and electrode bar (62) one end is connected with power transmission line (64), and electric arc furnace body (60) one side is provided with electric arc furnace feed inlet (41), and communicates with preheating device through electric arc furnace feed inlet (41), electric arc furnace body (60) top is provided with auxiliary material adding mechanism and flue gas blast pipe (63), is provided with steelmaking chamber (61) in electric arc furnace body (60), steelmaking chamber (61) lower part is provided with unloading net (68), and steelmaking chamber (61) bottom is provided with unloading pipe (69);

the horizontal feeding device comprises a conveying groove (10), wherein waste steel storage tables (12) are arranged on two sides of the conveying groove (10), one end of the conveying groove (10) is connected with a dust removing device, a pushing mechanism is arranged at the other end of the conveying groove (10), waste steel (13) in the conveying groove (10) can be pushed into the dust removing device by the pushing mechanism, a damping mechanism is arranged between the conveying groove (10) and the waste steel storage tables (12), a transfer mechanism is arranged on the waste steel storage tables (12), and the transfer mechanism can transfer the waste steel (13) on the waste steel storage tables (12) into the conveying groove (10);

The steel scrap dust removing device comprises a dust removing channel (20), one end of the dust removing channel (20) is communicated with a conveying groove (10), the other end of the dust removing channel (20) is communicated with a buffer tube (44), an exhaust structure is arranged at the top of the dust removing channel (20), an air inlet mechanism is connected to the bottom of the dust removing channel (20), and air flow entering the dust removing channel (20) through the air inlet mechanism can be discharged from the exhaust structure;

the feeding preheating device comprises a preheating channel (40), the preheating channel (40) is communicated with a buffer tube (44), the other end of the preheating channel (40) is communicated with an electric arc furnace feed inlet (41), a preheating cavity (58) is formed in the preheating channel (40), a preheating air inlet mechanism and a preheating air outlet mechanism are arranged on the preheating channel (40), a preheating tube is arranged in an interlayer of the preheating channel (40), along the conveying direction of scrap steel in the preheating channel (40), the preheating air inlet mechanism is close to the electric arc furnace feed inlet (41), the preheating air inlet mechanism is communicated with a tail gas conveying tube (47) after dust removal, the preheating air outlet mechanism is close to the buffer tube (44), and the hot air outlet mechanism is communicated with a tail gas exhaust tube (56) after dust removal.

2. The continuous production system of the electric arc furnace according to claim 1, wherein the auxiliary material adding mechanism comprises an auxiliary material adding tank (66) and an auxiliary material adding pipe (65), the auxiliary material adding tank (66) is communicated with a lime bin, a carbon ball bin and a magnesium ball bin, and a discharge hole at the bottom of the auxiliary material adding tank (66) is communicated with the top of the electric arc furnace body (60) through the auxiliary material adding pipe (65).

3. The continuous production system of the electric arc furnace according to claim 1, wherein one end of the flue gas exhaust pipe (63) is communicated with the top of the electric arc furnace body (60), the other end of the flue gas exhaust pipe is communicated with the air inlet end of the bag-type dust removal box (71), the air outlet end of the bag-type dust removal box (71) is communicated with a wind conveying mechanism, the wind conveying mechanism comprises a wind conveying branch pipe (72), a wind conveying main pipe (73) and a dust-removed tail gas conveying pipe (47), the wind conveying branch pipe (72) is communicated with the wind conveying main pipe (73), one end of the dust-removed tail gas conveying pipe (47) is communicated with the wind conveying main pipe (73), the other end of the dust-removed tail gas conveying pipe is communicated with the preheating device, and the dust-removed tail gas conveying pipe (47) is positioned behind the wind conveying branch pipe (72) along the air flow direction in the wind conveying main pipe (73).

4. The continuous production system of an electric arc furnace according to claim 1, characterized in that the scrap steel (13) on the scrap steel storage table (12) is located above the conveying trough (10) in the vertical direction, the damping mechanism comprises a first damping plate (3) and a second damping plate (4), the second damping plate (4) is arranged above the first damping plate (3), one end of the second damping plate (4) is connected with the scrap steel storage table (12), the bottom of the second damping plate (4) is connected with the first damping plate (3) through a connecting rod, and one end of the first damping plate (4) is connected with the top of the conveying trough (10).

5. The continuous production system for an electric arc furnace according to claim 4, wherein the first damper plate (3) and the second damper plate (4) are each provided obliquely, and the first damper plate (3) is inclined at a smaller angle in the horizontal direction than the second damper plate (4).

6. The continuous production system of an electric arc furnace according to claim 1, wherein the exhaust structure comprises an exhaust pipe (21) and an exhaust branch pipe (27), the exhaust pipe (21) is arranged above the dust removal channel (20), one end of the exhaust branch pipe (27) is communicated with the top of the dust removal channel (20), and the other end of the exhaust branch pipe (27) is communicated with the exhaust pipe (21).

7. The continuous production system of an electric arc furnace as claimed in claim 6, wherein the exhaust structure comprises a plurality of exhaust branch pipes (27), the exhaust branch pipes (27) are arranged at the same interval, and the vertical projection of the exhaust branch pipes (27) is positioned below the vertical projection of the exhaust pipe (21).

8. The continuous production system of the electric arc furnace according to claim 1, wherein the air inlet mechanism comprises a first air inlet mechanism and a second air inlet mechanism, the first air inlet mechanism and the second air inlet mechanism are respectively arranged at two sides of the dust collection channel (20), the first air inlet mechanism comprises a first air inlet fan (22), a first air inlet pipe (24) and a first air distribution structure (28), the first air distribution structure (28) is arranged in the dust collection channel (20) and is positioned at the bottom of the dust collection channel (20), one end of the first air inlet pipe (24) is connected with an air outlet end of the first air inlet fan (22), and the other end of the first air inlet pipe (24) is connected with the first air distribution structure (28);

The second air inlet mechanism comprises a second air inlet machine (23), a second air inlet pipe (25) and a second air distribution structure (29), wherein the second air distribution structure (29) is arranged in the dust collection channel (20) and is oppositely arranged at the bottom of the dust collection channel (20) with the first air distribution structure (28), one end of the second air inlet pipe (25) is connected with the air outlet end of the second air inlet machine (23), and the other end of the second air inlet pipe (25) is connected with the second air distribution structure (29).

9. The continuous production system of an electric arc furnace according to claim 1, wherein the preheating air inlet mechanism comprises a first fixed ring (42), an air inlet part and a first limiting part, the first fixed ring (42) is communicated with a dust-removed tail gas air pipe (47), an air flow channel is arranged in the first fixed ring (42) and is communicated with the air inlet part, the first fixed ring (42) is arranged on the periphery of the preheating channel (40), the air inlet part can preheat the preheating channel (40), the first limiting part is used for connecting the first fixed ring (42) with the preheating channel (40), the preheating air outlet mechanism comprises a second fixed ring (43), an air outlet part and a second limiting part, the second fixed ring (43) is communicated with a dust-removed tail gas exhaust pipe (56), an air flow channel is arranged in the second fixed ring (43), the air flow channel is communicated with the air outlet part, the second fixed ring (43) is arranged on the periphery of the preheating channel (40), the air outlet part can guide preheated air out of the preheating channel (40), and the second fixed ring (43) is connected with the limiting part.

10. The continuous production system for an electric arc furnace according to claim 9, wherein the air intake means comprises a first air intake pipe (48), a second air intake pipe (49), a third air intake pipe (50) and a fourth air intake pipe (51), the air intake means comprises a first air intake pipe (52), a second air intake pipe (53), a third air intake pipe (54) and a fourth air intake pipe (55), one end of the first air intake pipe (48) is communicated with an internal air flow passage of a first stationary ring (42), the other end is inserted into the preheating passage (40) from the top and is communicated with a first preheating pipe (57) provided in a top interlayer of the preheating passage (40), one end of the second air intake pipe (49) is communicated with an internal air flow passage of the first stationary ring (42), the other end is inserted into the preheating passage (40) from the side and is communicated with a second pipe provided in a side interlayer of the preheating passage (40), the other end is inserted into the preheating passage (40) from the side and is communicated with a third preheating pipe provided in a side interlayer of the preheating passage (40), and the third air intake pipe is provided opposite to the first air intake pipe (42) is provided in the side of the stationary ring, the other end is inserted into the preheating channel (40) from the bottom and is communicated with a fourth preheating pipe arranged in an interlayer at the bottom of the preheating channel (40);

One end of the first air outlet pipe (52) is communicated with the internal air flow channel of the second fixed ring (43), the other end of the first air outlet pipe is inserted into the preheating channel (40) from the top and is communicated with a first preheating pipe (57) arranged in a top interlayer of the preheating channel (40), one end of the second air outlet pipe (53) is communicated with the internal air flow channel of the second fixed ring (43), the other end of the second air outlet pipe is inserted into the preheating channel (40) from the side and is communicated with a second preheating pipe arranged in a side interlayer of the preheating channel (40), one end of the third air outlet pipe (54) is communicated with the internal air flow channel of the second fixed ring (43), the other end of the third air outlet pipe is inserted into the preheating channel (40) from the side and is communicated with a third preheating pipe arranged in a side interlayer of the preheating channel (40), the third preheating pipe and the second preheating pipe are arranged opposite, and one end of the fourth air outlet pipe (55) is inserted into the preheating channel (40) from the bottom and is communicated with a fourth preheating pipe arranged in a bottom interlayer of the preheating channel (40).