CN111964433A

CN111964433A - Intelligent control submerged arc furnace

Info

Publication number: CN111964433A
Application number: CN202010798856.3A
Authority: CN
Inventors: 黄军东
Original assignee: Zhongwei Maoye Metallurgy Co ltd
Current assignee: Zhongwei Maoye Metallurgy Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2020-11-20
Anticipated expiration: 2040-08-11
Also published as: CN111964433B

Abstract

The invention provides an intelligent control submerged arc furnace, which comprises: the device comprises a closed furnace body arranged at the lower part, smoke exhaust devices arranged around the closed furnace body, a three-phase electrode arranged at the center of the furnace body, and a distribution system for distributing materials into the furnace body; wherein, the distribution system includes again: the device comprises a group of material channels leading to the furnace body from the top of the closed furnace body, a batching station arranged outside the furnace body, a ring-type material distributing device arranged at the top of the material channels and used for distributing materials distributed by the batching station to each material channel for the second time, and a material distributing device arranged at the lower part of the material channels and used for distributing materials sliding downwards in the material channels to each position in the submerged arc furnace. The submerged arc furnace realizes intelligent control in the aspects of material distribution and flue gas recycling.

Description

Intelligent control submerged arc furnace

Technical Field

The invention relates to a submerged arc furnace, in particular to an intelligent control submerged arc furnace.

Background

The hot stove in ore deposit is the high-power electrical equipment who smelts heat energy with electric energy conversion, it is a continuous process to use the hot stove in ore deposit to smelt ferrosilicon, in the in-process of smelting constantly according to the condition adjustment material ratio in the furnace body, traditional hot stove in ore deposit is open type structure, experienced furnace length is according to the smelting situation in the range estimation stove, artifical judgement needs that kind of material of adding, the experience of furnace length is excessively relied on in the feeding of furnace body, and can't accomplish the quantization, accurate interpolation material, and the material often only adds from the unilateral of furnace body, cause the material to add inhomogeneous, can't give full play to three-phase electrode's performance, secondly, open type structure's furnace body, the flue gas that produces when making the hot stove in ore deposit disperse to atmospheric environment, cause very big pollution.

The batching is a prerequisite condition of high quality, high yield and low consumption of the submerged arc furnace, timely and accurate batching and feeding are the premise of ensuring the yield and the product quality of the blast furnace, most of the feeding systems of ferrosilicon production enterprises at home and abroad are in a semi-mechanized and pure manual feeding mode, and the mode has a series of problems and disadvantages of low batching efficiency, low batching material ratio accuracy and the like, and has many potential safety hazards.

Disclosure of Invention

The invention provides an intelligent control submerged arc furnace for solving the problems in the prior art.

This hot stove in ore deposit includes: the device comprises a closed furnace body arranged at the lower part, smoke exhaust devices arranged around the closed furnace body, a three-phase electrode arranged at the center of the furnace body, and a distribution system for distributing materials into the furnace body; wherein, the distribution system includes again: the device comprises a group of material channels leading to the furnace body from the top of the closed furnace body, a batching station arranged outside the furnace body, a ring-type material distributing device arranged at the top of the material channels and used for distributing materials distributed by the batching station to each material channel for the second time, and a material distributing device arranged at the lower part of the material channels and used for distributing materials sliding downwards in the material channels to each position in the submerged arc furnace. The batching station determines the mass proportion of the total materials through screening and weighing, and the ring-type material distributing device uniformly distributes the required materials to different bins, so that the materials are uniformly distributed into the closed furnace body from each material channel in the furnace.

Further, the batching station comprises: a set of big feed bin that is used for keeping in different kind materials, the vibrating screen who sets up in the big feed bin below that is used for splendid attire blue carbon and ferrosilicon ore descends the glassware, installs the storehouse of weighing at top between the concrete batching, hangs in the vibrating blanking machine of the storehouse below of weighing for the material after will weighing transports to ring type feed divider's transmission device.

Furthermore, the ring type material distributing device is installed on an upper platform at the top of the submerged arc furnace, the ring type material distributing device is communicated with each material channel through a group of ring distribution type material bins with holes at the lower parts, and the upper parts of the ring distribution type material bins are provided with rotary material distributing vehicles which can move above the ring distribution type material bins.

Furthermore, at least three pressure sensors are arranged on the mounting surface of each weighing bin or the ring distribution type bin and are used for weighing the mass of materials in the bins, and the intelligent control is realized by controlling the starting and stopping of the vibration blanking machine according to the mass.

Furthermore, a mixing bin is arranged at the tail end of the conveying device, and materials output from the distribution station are mixed by the mixing bin and then are further conveyed to the rotary distribution vehicle through the conveying device.

Furthermore, the furnace shaft of closed furnace body is located the bottom, and furnace wall and bell are setting gradually on furnace shaft upper portion, are equipped with the lower floor's platform that provides working space for the staff between furnace wall and the furnace shaft, distributing device installs at the bell top.

The material distributing device further comprises a rotary material barrel which can rotate by no more than 120 degrees under the driving of an oil cylinder, and a material sliding plate which is hinged at the bottom of the rotary material barrel and can rotate around a hinge shaft under the driving of the oil cylinder, wherein the upper part of the rotary material barrel is connected with the bottom of a material channel through a bearing, and the lower part of the rotary material barrel is arranged on a furnace cover through a plurality of heat-resistant rollers.

Furthermore, a vibration blanking device is arranged in the middle of the material, the diameter of an upper feeding hole of the vibration blanking device is slightly larger than that of a material channel, the diameter of a lower discharging hole of the vibration blanking device is slightly smaller than that of the material channel, the upper feeding hole and the lower discharging hole are respectively connected with the material channel in a non-contact mode, and part of the material channel close to the vibration blanking device is an inclined material tube.

Further, the submerged arc furnace also comprises: the flue gas recycling device is arranged on the middle-layer platform between the upper-layer platform and the lower-layer platform, and consists of a flue gas collecting device and a flue gas recycling device.

Further, the centrifugal fan of the flue gas collecting device utilizes the air suction branch pipes to extract a small amount of flue gas overflowing from the submerged arc furnace from an operation room between the middle-layer platform and the lower-layer platform, positive pressure gas is continuously supplied to the ring-type gas supply pipe of the flue gas utilization device, and the gas in the ring-type gas supply pipe is introduced into the material distribution device and the vibration blanking device which need to use cooling gas for flue gas sealing through the branch pipes.

The invention has the technical effects that: to the hot stove required blue carbon in ore deposit, ferrosilicon ore and iron powder are distributed and are added to the big feed bin of difference, because blue carbon, the powdery material in the ferrosilicon ore raw materials contains the impurity that does not need in a large number of smelts, consequently adding blue carbon, the big feed bin below of ferrosilicon ore, set up vibrating screen blanking device, sift out the powdery material in blue carbon and ferrosilicon ore, reduce the impurity content in the raw materials by a wide margin, improve the quality of finished product ferrosilicon, cubic material and iron powder are after weighing in weighing the storehouse, through the vibration blanking machine of control below the storehouse of weighing, it is correct to ensure to add the ratio of each material in the furnace body, the quality is controllable. The ring type feed divider at the top of the submerged arc furnace performs secondary distribution and weighing on the materials, confirms the total weight of the materials added into each ring distribution type bin, enables the materials to uniformly enter a material channel from eight ring distribution type bins, and avoids the phenomenon of uneven materials caused by the traditional single-side feeding mode.

According to the invention, the material distribution device is arranged at the bottom of the material channel, so that on one hand, materials falling from the material channel are prevented from directly hitting the bottom surface of the furnace body to cause material loss, on the other hand, the rotatable material sliding plate can adjust the outflow direction and angle of the materials, and a worker can select the annular material bin at the correct position and control the material distribution device at the lower end according to the working state of the electrode to add the materials to the position required by the furnace body, so that accurate material distribution and feeding are realized.

On the premise of realizing automatic, accurate, quantitative and uniform distribution, the invention can judge whether the material needs to be fed into the furnace body according to the working parameters of the electrodes, changes the situation of depending on the experience of the furnace master in the past, designs the furnace body into a closed furnace body, avoids the overflow of the smoke in the furnace during combustion, and can be used for steam power generation due to the fact that the smoke in the furnace contains a large amount of heat, and the smoke discharged from the smoke discharge device is discharged into the atmospheric environment after being purified, so that the generated power can be merged into a standard power grid to compensate the electricity charge of the submerged arc furnace. Even if a small amount of smoke and dust overflows to the outside of the furnace body from the assembled reserved gap or the opened furnace door, the smoke and dust can be recovered by the smoke and dust collecting device arranged on the middle-layer platform and supplied to a device which needs low-temperature smoke and gas sealing on the submerged arc furnace by the smoke and dust utilizing device.

Drawings

FIG. 1 is an isometric view of an intelligently controlled submerged arc furnace of the present invention;

FIG. 2 is a front view of the submerged arc furnace of the present invention;

FIG. 3 is a side view of the batching station according to the present invention;

FIG. 4 is an isometric view of the ring type feed divider of the present invention;

FIG. 5 is a cross-sectional view of a distributing device according to the invention;

FIG. 6 is a cross-sectional view of the vibratory blanking apparatus of the present invention;

FIG. 7 is an isometric view of the flue gas reuse device of the present invention;

in the figure, 1, a material distribution station, 2, an annular material distribution device, 3, a material distribution device, 4, a smoke gas recycling device, 5, a smoke exhaust device, 6, a closed furnace body, 7, a vibration blanking device, 8, a lower platform, 9, a middle platform, 10, an upper platform, 11, a vibration screening blanking device, 12, a large storage bin, 13, a pressure sensor, 14, a weighing bin, 15, a concrete batching room, 16, a mixing storage bin, 17, a transmission device, 18, a vibration blanking machine, 21, an annular material distribution storage bin, 22, a rotary material distribution cart, 31, a rotary material barrel, 32, a material sliding plate, 33, a heat-resistant roller, 34, a bearing, 41, a smoke gas collection device, 42, a smoke gas utilization device, 61, a furnace body, 62, a furnace wall, 63, a furnace cover, 71, an inclined material pipe, 100, a material channel, 411, a centrifugal fan, 412, a gas suction distribution pipe and 421, an annular gas supply.

Detailed Description

The following describes a specific embodiment of the present invention with reference to fig. 1 to 7.

Fig. 1 and 2 illustrate the main components of a submerged arc furnace, which includes: set up at the closed furnace body 6 of lower part, install in fume extractor 5 around the closed furnace body 6, set up in the three-phase electrode at furnace body center, to the delivery system of interior delivery material of furnace body, wherein, delivery system includes again: the system comprises a group of material channels 100 leading to the furnace body from the top of a closed furnace body 6, a batching station 1 arranged outside the furnace body, a ring-type material distributing device 2 arranged at the top of the material channels 100 and used for distributing materials distributed by the batching station 1 to each material channel 100 for the second time, and a material distributing device 3 arranged at the lower part of the material channels 100 and used for distributing materials sliding downwards in the material channels 100 to each position in the submerged arc furnace;

the batching plant 1 comprises: the device comprises a group of large bins 12 for temporarily storing different types of materials, a vibrating screening blanking device 11 arranged below the large bins 12 for containing the semi-coke and the ferrosilicon ore, and at least three pressure sensors 13 arranged on the mounting surface of each weighing bin 14 and used for weighing the mass of the materials in the bins; the end of the conveyor 17 is also provided with a mixing bunker 16, and the materials output from the distribution station 1 are mixed by the mixing bunker 16 and then further conveyed to the rotary distribution vehicle 22 through the conveyor 17.

The furnace body 61 of the closed furnace body 6 is positioned at the bottommost layer, the furnace wall 62 and the furnace cover 63 are sequentially arranged at the upper part of the furnace body 61, the lower-layer platform 8 for providing a working space for workers is arranged between the furnace wall 62 and the furnace body 61, and the distributing device 3 is arranged at the top of the furnace cover 63.

Fig. 3 shows the layout of the devices of the batching plant, a weighing bin 14 mounted on top of the concrete batching plant 15, a vibrating blanking machine 18 suspended below the weighing bin 14, and a conveyor 17 for conveying the weighed material to the ring-type material distribution device 2.

Fig. 4 illustrates the main components of the ring-type material distribution device, wherein the ring-type material distribution device 2 is installed on the upper platform 10 at the top of the submerged arc furnace, the ring-type material distribution device 2 is communicated with each material channel 100 through a group of ring-type material bins 21 with holes at the lower part, the upper part of the ring-type material bins 21 is provided with a rotary material distribution vehicle 22 which can move above each ring-type material bin 21, and the installation surface of each ring-type material bin 21 is provided with at least three pressure sensors 13 for weighing the mass of the materials in the material bins.

Fig. 5 shows the internal structure of the material distributing device, wherein the material distributing device 3 comprises a rotary material barrel 31 which can rotate by no more than 120 degrees under the driving of an oil cylinder, and a material sliding plate 32 which is hinged at the bottom of the rotary material barrel 31 and can rotate around a hinge shaft under the driving of the oil cylinder, wherein the upper part of the rotary material barrel 31 is connected with the bottom of a material channel 100 through a bearing 34, and the lower part of the rotary material barrel 31 is arranged on a furnace cover 63 through a plurality of heat-resistant rollers 33.

Fig. 6 illustrates an internal structure of the vibrating blanking device, a vibrating blanking device 7 is disposed in the middle of the material channel 100, the diameter of an upper feed port of the vibrating blanking device 7 is slightly larger than that of the material channel 100, the diameter of a lower discharge port of the vibrating blanking device 7 is slightly smaller than that of the material channel 100, the upper feed port and the lower discharge port are respectively connected with the material channel 100 in a non-contact manner, and a part of the material channel 100 close to the vibrating blanking device 7 is an inclined material pipe 71.

Fig. 7 illustrates an installation position of the flue gas recycling apparatus on the submerged arc furnace, which further includes: the flue gas recycling device 4 is arranged on a middle-layer platform 9 between an upper-layer platform 10 and a lower-layer platform 8, wherein the flue gas recycling device 4 consists of a flue gas collecting device 41 and a flue gas recycling device 42; the centrifugal fan 411 of the flue gas collecting device 41 uses the air suction branch pipe 412 to extract a small amount of flue gas overflowing from the submerged arc furnace from the operating room between the middle platform 9 and the lower platform 8, and continuously provides positive pressure gas to the annular gas supply pipe 421 of the flue gas utilization device 42, and the gas in the annular gas supply pipe 421 is introduced into the material distribution device 3 and the vibration blanking device 7 which need to use cooling gas for flue gas sealing through each branch pipe.

The working principle is as follows: various materials enter from a large material bin 12, ferrosilicon ore and blue carbon are screened out to be blocky materials by a vibrating screening blanking device 11 and are sent to a weighing bin 14, the iron powder directly enters the weighing bin 14, a vibrating blanking machine below each weighing bin 14 is controlled according to a required mass proportion, the materials are sent to a conveyor 17, the conveyor 17 drives the materials to be lifted to the top of the submerged arc furnace from a concrete batching room 15 and is continuously conveyed to an annular material distributing device 2 after being mixed in a mixing bin 16, a rotating material distributing vehicle 22 of the annular material distributing device 2 distributes the materials to an annular material bin 21, the materials fall to a vibrating blanking device 7 along a material channel 100, and a part of the vibrating blanking device 7, which is connected with the material channel 100, is an inclined material pipe 71, so that the falling speed of the materials can be delayed, and the materials are prevented from being collided and extruded in the.

The material passes through vibration unloader 7, slide to the furnace body bottom along swift current flitch 32 of distributing device 3, the furnace body is closed, can't observe the interior condition of stove during the smelting, the flue gas that the furnace body produced during smelting most is directly drawn forth through fume extractor 5, a small amount of flue gas that flows into the operation room when the furnace gate is opened from the fit-up gap, inhale by inhaling on the flue gas collection device 41 branch pipe 412 with the air mixture of surrounding, under centrifugal fan 411's effect, these gas is again through ring-type air supply pipe 421, distribute to each needs cooling and airtight device.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an intelligent control submerged arc furnace which characterized in that, this submerged arc furnace includes: the device comprises a closed furnace body (6) arranged at the lower part, smoke exhaust devices (5) arranged around the closed furnace body (6), a three-phase electrode arranged at the center of the furnace body, and a distribution system for distributing materials into the furnace body;

wherein, the distribution system includes again: the device comprises a group of material channels (100) leading to the furnace body from the top of a closed furnace body (6), a batching station (1) arranged outside the furnace body, a ring-type material distributing device (2) arranged at the top of the material channels (100) and used for distributing materials batched by the batching station (1) to the material channels (100) for the second time, and a material distributing device (3) arranged at the lower part of the material channels (100) and used for distributing materials sliding downwards in the material channels (100) to each position in the submerged arc furnace.

2. The intelligently controlled submerged arc furnace according to claim 1, characterized in that the batching station (1) comprises: a large material bin (12) for temporarily storing different types of materials, a vibrating screen blanking device (11) arranged below the large material bin (12) for containing the blue carbon and the silicon iron ore, a weighing bin (14) arranged at the top of a concrete batching room (15), a vibrating blanking machine (18) suspended below the weighing bin (14), and a conveying device (17) for conveying the weighed materials to a ring type material distributing device (2).

3. The intelligent control submerged arc furnace according to claim 2, characterized in that the ring-type material distribution device (2) is mounted on an upper platform (10) at the top of the submerged arc furnace, the ring-type material distribution device (2) is communicated with the material channels (100) through a group of annular distributed bins (21) with holes at the lower part, and the rotary material distribution vehicle (22) which can move above the annular distributed bins (21) is arranged at the upper part of the annular distributed bins (21).

4. The intelligent controlled submerged arc furnace according to any of the claims 2 or 3, characterized in that at least three pressure sensors (13) are arranged on the mounting surface of each weighing bin (14) or distributed storage bin (21) for weighing the mass of the material in the storage bin.

5. An intelligently controlled submerged arc furnace according to claim 3, characterized in that the end of the conveyor (17) is provided with a mixing silo (16), and the material delivered from the distribution station (1) is mixed by the mixing silo (16) and further transferred to the rotary distribution car (22) by the conveyor (17).

6. The intelligent controlled submerged arc furnace according to claim 1, wherein the furnace body (61) of the closed furnace body (6) is positioned at the bottommost layer, a furnace wall (62) and a furnace cover (63) are sequentially arranged at the upper part of the furnace body (61), a lower layer platform (8) for providing a working space for workers is arranged between the furnace wall (62) and the furnace body (61), and the distributing device (3) is arranged at the top of the furnace cover (63).

7. The intelligent controlled submerged arc furnace according to claim 6, wherein the material distribution device (3) comprises a rotary material barrel (31) which can rotate by no more than 120 degrees under the driving of an oil cylinder, a material sliding plate (32) which is hinged at the bottom of the rotary material barrel (31) and can rotate around a hinge shaft under the driving of the oil cylinder, wherein the upper part of the rotary material barrel (31) is connected with the bottom of the material channel (100) through a bearing (34), and the lower part of the rotary material barrel (31) is arranged on the furnace cover (63) through a plurality of heat-resistant rollers (33).

8. The intelligent control submerged arc furnace according to claim 7, wherein a vibrating blanking device (7) is arranged in the middle of the material channel (100), the diameter of an upper feeding hole of the vibrating blanking device (7) is slightly larger than that of the material channel (100), the diameter of a lower discharging hole of the vibrating blanking device (7) is slightly smaller than that of the material channel (100), the upper feeding hole and the lower discharging hole are respectively connected with the material channel (100) in a non-contact manner, and the part of the material channel (100) close to the vibrating blanking device (7) is an inclined material pipe (71).

9. The intelligently controlled submerged arc furnace of claim 8, wherein the submerged arc furnace further comprises: the flue gas recycling device (4) is arranged on a middle-layer platform (9) between an upper-layer platform (10) and a lower-layer platform (8), wherein the flue gas recycling device (4) consists of a flue gas collecting device (41) and a flue gas recycling device (42).

10. The intelligent controlled submerged arc furnace according to claim 9, characterized in that the centrifugal fan (411) of the flue gas collection device (41) uses a suction branch pipe (412) to draw a small amount of flue gas overflowing from the submerged arc furnace from the operating room between the upper platform (9) and the lower platform (8), and continuously supplies positive pressure gas to the annular gas supply pipe (421) of the flue gas utilization device (42), and the gas in the annular gas supply pipe (421) is introduced into the distributing device (3) and the vibrating blanking device (7) which need to be flue gas sealed by using cooling gas through the respective branch pipes.