CN113403439A - Leaked material online return utilization device and online return utilization method - Google Patents
Leaked material online return utilization device and online return utilization method Download PDFInfo
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- CN113403439A CN113403439A CN202110678954.8A CN202110678954A CN113403439A CN 113403439 A CN113403439 A CN 113403439A CN 202110678954 A CN202110678954 A CN 202110678954A CN 113403439 A CN113403439 A CN 113403439A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P10/20—Recycling
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Abstract
An online leaked material return utilization device and an online material return utilization method belong to the technical field of blast furnace smelting. This device is utilized in online return of hourglass material, including furnace roof material jar, blast furnace roof hopper, furnace roof material jar relief valve, material jar punching press pipeline, last seal valve, material jar punching press valve, wherein connect the feed bin, with blast furnace roof hopper is adjacent setting side by side, connect the feed bin through the hourglass material return pipe with material jar punching press pipeline is linked together, through set up in connect the feed bin with the hourglass material valve control between the hourglass material return pipe the online return of hourglass material utilizes. The device has simple structure, the recycling method is easy to operate, the material leakage and the material returning can be directly recycled on line, the resource waste of ore and coke is reduced, and the cost of raw materials is reduced.
Description
Technical Field
The invention belongs to the technical field of blast furnace smelting, and particularly relates to an online leaked material recycling device and an online leaked material recycling method.
Background
The blast furnace smelting process is the most applied iron-making process with the advantages of simple flow, large yield, high productivity, low energy consumption and the like, and a furnace top feeding system is one of core equipment of the blast furnace smelting process.
The process path of the raw materials in the furnace top feeding system is belt → receiving tank → feeding gate → upper sealing valve → weighing tank → material flow adjusting valve → lower sealing valve → airtight box (central throat pipe) → distributing chute → furnace cylinder, and the hydraulic system is controlled by a preset automatic program to drive the gate plates to act in sequence so as to complete the charging, discharging and distributing of the furnace top feeding system.
At present, large-scale blast furnaces in China generally adopt belt feeding, and the feeding amount per unit time is synchronously increased along with the progress of blast furnace strengthening smelting. As the feeding amount of the belt is increased, the material layer on the belt is thickened, the thickness range of the material layer is generally 300-500mm, the thickest middle part reaches about 500mm, and the two sides are gradually thinned. When transporting to blast furnace roof hopper, because must have the difference in height between main belt discharge gate and the furnace roof hopper, this can lead to partial furnace charge to bounce-back and leak to the outside place of hopper, with present belt material loading layer thickness higher, the difference in height is bigger, cause more and a large amount of furnace charges to spill, in addition, the powder etc. that bond on the belt also need artifical clearance, above-mentioned in-process leaks material and bonds the powder production, can not directly get into the blast furnace after the manual clearance, abandon or return raw materials preparation technology and recycle as the waste material, extravagant raw materials, increase artifical clearance recovery labor volume, the cost of above-mentioned raw materials reuse has also been increased.
In addition, when the blast furnace loaded by the car is used, the height difference between the track of the skip car and the receiving hopper at the top of the blast furnace is large, the skip car is easy to store materials at the bottom, when the skip car returns after the materials are placed, the return stroke belongs to inclination angle lifting, and the stored materials are rebounded and leaked due to the operation vibration of the skip car; there are also cases where: because the furnace burden is piled up in the receiving hopper in a cone shape, the middle is higher, and when the piling height of the furnace burden in the receiving hopper at the top of the furnace is close to or exceeds the height of the receiving hopper, the furnace burden at the upper layer is easy to rebound and leak. At the moment, the height difference is about 200mm generally, the rebounded furnace burden partially leaks out of the external field from the height difference gap due to irregular motion, and when the furnace burden in the skip car is poured into the furnace top receiving hopper, the rebounding and material leakage phenomenon is obvious, so that a large amount of furnace burden is leaked, raw materials are wasted, and the manual cleaning and recycling amount of labor is increased.
The existing blast furnace top feeding system does not effectively directly recycle the leaked materials and the returned materials in the furnace top area to a charging bucket and then put into a blast furnace smelting technology. Regarding the leakage of the blast furnace top receiving system (generally, coke is easy to leak compared with sintering material, because the coke density is small, the rebound is easy, the sintering ore with small granularity (below 5mm, including powder) is easy to rebound and leak, therefore, the leakage has the characteristics of coke proportion increase, small granularity and the like), the leakage is manually cleaned and then transported to a lower storage bin of a blast furnace tank for reuse, or the leakage in the top receiving hopper area is directly treated as solid waste. Under the background of the age of the gradual shortage of ore resources, a large amount of valuable furnace burden cannot be effectively utilized, and the ore resources are wasted.
According to the problems, the recycling of the leaked materials and the returned materials in the furnace top area needs to be improved urgently so as to reduce the waste of ore and coke resources and reduce the cost of raw materials.
Disclosure of Invention
The embodiment of the application aims to provide an online leaked material return utilization device and an online leaked material return utilization method, the device is simple in structure, the return utilization method is easy to operate, online direct return utilization of leaked materials and returned materials can be realized, waste of ore and coke resources is reduced, and the cost of raw materials is reduced.
The application is realized as follows:
in a first aspect, an example of the present application provides an online leaked material return utilization device, including a furnace top charging bucket, a blast furnace top receiving hopper, a furnace top charging bucket pressure relief valve, a charging bucket punching pipeline, an upper sealing valve, and a charging bucket punching valve, further including:
and the material receiving bin is arranged adjacent to the receiving hopper on the top of the blast furnace in parallel, the material receiving bin is communicated with the material tank punching pipeline through a material leakage return pipe, and the material leakage valve between the material receiving bin and the material leakage return pipe is controlled to return the material leakage on line for utilization.
In some examples, the bucket punching pipeline comprises a bucket punching upper pipeline and a bucket punching lower pipeline, and the bucket punching lower pipeline is obliquely arranged.
In some examples, the leaking return pipe is communicated with the charging bucket punching lower pipeline, the diameter of the leaking return pipe is smaller than that of the charging bucket punching lower pipeline, the leaking return pipe is obliquely arranged, and the obliquely arranged charging bucket punching lower pipeline is inserted.
In some examples, the leaked material return pipe and the punched pipeline of the charging bucket are inclined at the same or different inclination angles alpha relative to the horizontal plane, and the inclination angle alpha is more than or equal to 45 degrees and less than or equal to 65 degrees.
In some examples, the receiving bin is located below a charging belt motor on the furnace roof, the opening width of the receiving bin is larger than the width of a belt for conveying furnace materials, and scraping plates are further arranged above the receiving bin and below the charging belt motor on the furnace roof and used for scraping off returned materials adhered to the belt.
In some examples, the bucket punching valve is arranged on the bucket punching upper pipeline which is horizontally arranged, and the bucket punching valve is positioned on the bucket punching upper pipeline which is far away from one side of the bucket and is communicated with the leaking return pipe.
In a second aspect, an example of the present application provides an online leaked material return utilization method, which utilizes an online leaked material return utilization device to realize online leaked material return utilization, wherein when the leaked material in the material receiving bin reaches a set quality, the normal heat in the furnace top material tank is treated after the furnace burden is placed into the blast furnace and the furnace top material tank and the inside of the blast furnace are in an isolation state, the material leakage valve is opened, the leaked material in the material receiving bin enters the furnace top material tank through the material leakage return pipe, then the material leakage valve is closed, the upper sealing valve is opened, the furnace burden in the furnace top material receiving bin is placed into the furnace top material tank, the mass ratio of the furnace burden placed into the furnace top material tank and the leaked material is controlled to a set ratio, the furnace burden is stopped to be placed, and then the mixed furnace burden is distributed into the blast furnace.
In some examples, the set mass is 1800-; the set proportion is 15: 1-20: 1.
in some examples, before the leaked materials in the receiving bin enter the charging bucket through the leaked material return pipe, the upper sealing valve is opened additionally, and the furnace materials in the receiving hopper at the top of the blast furnace are placed into the charging bucket.
In some examples, the method for online return utilization of leaked materials when the leaked materials in the material receiving bin reach the set quality comprises the following specific steps:
step one, after the furnace burden of a normal heat in a furnace top charging bucket is placed into a blast furnace and the furnace top charging bucket is in an isolated state with the inside of the blast furnace, opening a pressure release valve of the furnace top charging bucket for pressure release, opening a material leakage valve after the pressure of the furnace top charging bucket is normal pressure, and enabling the material leakage in a material receiving bin to enter the furnace top charging bucket through a material leakage return pipe;
step two, after all the leaked materials enter the furnace top charging bucket, closing the material leaking valve, opening the upper sealing valve, putting the furnace materials in the blast furnace top receiving bucket into the furnace top charging bucket, and stopping putting the furnace materials after the mass ratio of the furnace materials put into the furnace top charging bucket to the leaked materials is controlled to a set ratio to obtain mixed furnace materials;
and step three, closing the pressure relief valve of the furnace top charging bucket, opening the charging bucket punching valve, supplementing the pressure of the furnace top charging bucket to be the same as the pressure in the blast furnace, and then distributing the mixed furnace burden into the blast furnace.
In some examples, when the leaking materials are bonded with the material receiving bin and/or the leaking material pipeline, after all the leaking materials in the material receiving bin are put into the furnace top charging bucket, the leaking material valve is in an open state, the pressure release valve of the furnace top charging bucket is closed, the charging bucket punching valve is opened, high-pressure nitrogen is introduced to blow the charging bucket punching pipeline and the material receiving bin for 10-20 seconds, when the pipeline is blown and the material receiving bin are blown, the belt motor on the furnace top is in a stop operation state, and the dust removal system on the furnace top is in an operation state.
The beneficial effect of this application includes:
the material receiving bin is arranged to receive leaked materials, the material receiving bin is communicated with an existing material tank punching pipeline, the punching function of an original material tank is not affected, an existing material tank punching pipeline is utilized, the leaked materials are arranged, and valves such as a furnace top material tank pressure relief valve, a material tank punching pipeline, an upper sealing valve and a material tank punching valve in an original blast furnace feeding system are matched, on the basis of existing equipment, the leaked materials and returned materials are directly returned and utilized on line, the equipment transformation cost is low, the leaked materials are not needed to be manually cleaned and then processed or discarded, and the raw material processing cost is reduced. After the leaked materials and the returned materials are distributed into the material tank, normal furnace materials are distributed on the material tank, and the proportion of the leaked materials is reduced, so that the material distribution requirement of the blast furnace is met through a mixed distribution mode of the leaked materials and the normal materials, the online direct recycling of the leaked materials is realized, the influence of the excessively low particle size on the blast furnace sequence is avoided, the air permeability of the blast furnace is guaranteed, and the smooth operation of the furnace materials of the blast furnace is guaranteed. The material leakage in the material receiving hopper is controlled to be within a proper range, the material leakage and the material returning are controlled to directly recycle, the impact on the original pressure equalizing system is small as much as possible, otherwise, the pressure equalizing system pipeline is easy to cause segregation under the heavy load condition, and the pressure equalizing pipeline is damaged. Further, normal furnace burden is distributed at the bottom of the charging bucket, then leakage and return materials with fine granularity are distributed on the normal furnace burden, and then the normal furnace burden is distributed on the leakage, namely a three-layer distributing mode of the normal furnace burden + the leakage + the normal furnace burden is adopted, so that a structure close to the normal furnace burden is simulated and approached to the normal furnace burden as much as possible, the problem that the leakage and the return materials are fine and cannot be directly recycled is solved, the effect of optimizing the distribution is achieved, the normal furnace burden is arranged at the bottom layer, and the problems that the lower sealing valve and other parts entering the blast furnace are bonded or the agglomeration is not easy to clean and the like due to the fact that the leakage and the return materials are. The device has a simple structure, the recycling method is easy to operate, the material leakage and the material returning can be directly recycled on line, the waste of ore and coke resources is reduced, and the cost of raw materials is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic view of a device for on-line return of leaked materials;
icon: 1-furnace burden; 2-furnace top feeding belt motor; 3-furnace top leakage; 4-blast furnace top receiving hopper; 5-furnace top charging bucket pressure relief valve; 6-furnace top charging bucket; 7-blast furnace; 8-a bucket ram valve; 9-a material leakage valve; 10-receiving a bin; 11-an upper sealing valve; 12-a scraper; 13-a belt; 14-scraping the returned material; 15-a leakage return pipe; 16-punching lower pipelines of the charging bucket; 17-charging bucket punching upper pipeline; the angle of inclination is alpha.
Detailed Description
The application provides a leaked material online return utilization device based on leaked material recycling, and the leaked material online return utilization device is used for achieving leaked material online return utilization.
In order to facilitate understanding of the working principle and the using mode of the online leaked material return utilization device, the structure of the online leaked material return utilization device is given below, and a description of the online leaked material return utilization device in the present application is developed based on the structure.
The structure of the leaked material on-line return utilization device is shown in figure 1.
An online leaked material return utilization device comprises a furnace top charging bucket 6, a charging hopper and a feedback device, wherein the furnace top charging bucket is used for storing furnace materials 1 distributed into a blast furnace body; the blast furnace top receiving hopper 4 is used for receiving the furnace burden of the thick material layer on the belt, wherein the thickness of the furnace burden of the thick material layer is 300-500mm, the thickest middle part reaches about 500mm, and the two sides become thinner gradually; the furnace top charging bucket pressure relief valve 5 is used for relieving the high pressure in the furnace top charging bucket 6 and then recovering the normal pressure to charge before the furnace top charging bucket 6 charges; the upper sealing valve 11 is used for sealing and separating the blast furnace top receiving hopper 4 and the furnace top charging bucket 6; a charging bucket punching pipeline (comprising a charging bucket punching lower pipeline 16 and a charging bucket punching upper pipeline 17) and a charging bucket punching valve 8, which are used for increasing the pressure of the charging bucket 6 at the top of the furnace to be the same as or similar to the working pressure in the blast furnace 7 before distributing materials to the blast furnace 7.
Further comprising: the material receiving bin 10 is arranged adjacent to the receiving hopper 4 on the top of the blast furnace in parallel, the material receiving bin 10 is communicated with the punching pipeline of the material tank through a material leakage return pipe 15, and the online return utilization of the material leakage 3 on the top of the blast furnace is controlled through a material leakage valve 9 arranged between the material receiving bin 10 and the material leakage return pipe 15. The shape of the receiving bin 10 arranged adjacent to the receiving bin 4 at the top of the blast furnace in parallel is not particularly limited, and can be selected to be in the shape of a reversed-edge four-sided frustum with a large upper opening and a small lower opening, a reversed-edge cone with a large upper opening and a small lower opening and the like, and the specific shape selection can be determined according to the actual requirement of the receiving bin 10 for receiving leaked materials. The material for making the receiving bin 10 is not specifically limited, and can be selected from stainless steel, high-strength wear-resistant steel, ceramic wear-resistant lining steel plates and the like; in some examples, the receiving bin 10 is located below the charging belt motor 2 on the furnace top, and the opening width of the receiving bin 10 is larger than the width of a belt 13 for transporting the furnace charge, so as to collect the leaked materials on the furnace top to the maximum extent, wherein the leaked materials refer to: the coke is easy to leak compared with the sintering material because the coke has small density and easy rebound, and the sintering ore with small granularity (less than 5mm, including powder) is easy to rebound and leak, so the leaking material has the characteristics of increased coke proportion, small granularity and the like. The receiving bin 10 is fixedly supported by a support structure, and the specific support structure is not particularly limited and can be specifically determined according to the arrangement condition of a blast furnace burden feeding system and the actual supporting requirement.
The material leakage is received through the arrangement of the material receiving bin, the material receiving bin is communicated with the existing material tank punching pipeline, the original material tank punching function is not influenced, the existing material tank punching pipeline is utilized, the material leakage valve is arranged, and the material tank punching pipeline, the upper sealing valve, the material tank punching valve and other valves in the original blast furnace feeding system are matched, on the basis of the existing equipment, the material leakage and the material return are directly recycled on line, the equipment transformation cost is low, the material leakage reprocessing or abandonment is not needed to be carried out after the material leakage is manually cleaned, and the raw material processing cost is reduced.
The leakage return pipe 15 is communicated with the charging bucket punching lower pipeline 16, and different realization modes can be realized according to specific use requirements for the communication mode of the leakage return pipe 15 and the charging bucket punching lower pipeline 16. For example, a three-way pipe is arranged on the punching lower pipeline 16 of the charging bucket, and the leakage return pipe 15 is connected with the three-way pipe to realize the communication between the two pipelines or other realization forms. As an example, in the present invention, the diameter of the bucket punching pipe is about 250mm, the leaking return pipe 15 is arranged below the leaking valve 9 arranged between the receiving bin 10 and the leaking return pipe 15, the diameter is 100 mm and 200mm, the leaking return pipe 15 and the bucket punching return pipe 15 are obliquely arranged such that the pipes have the same inclination angle α with respect to the horizontal plane, the inclination angle α is 45 ° or more and 65 ° or less, the pipes are obliquely arranged to facilitate the delivery of the leaked materials, the diameter of the leaking return pipe 15 is smaller than the diameter of the bucket punching return pipe 16, a hole slightly larger than the diameter of the leaking return pipe 15 is formed on the bucket punching return pipe 16, so that the obliquely arranged leaking return pipe 15 is inserted into the obliquely arranged punching return pipe 16, the hole formed on the bucket punching return pipe 16 is fixedly connected to the bucket punching return pipe 16, the concrete connection mode is not limited, and the modes such as welding and the like can be selected for fixing and sealing the pipeline connection. The depth of the leakage return pipe 15 inserted into the charging bucket punching lower pipeline 16 can be determined according to the actual requirement that the leakage returns and is distributed into the furnace top charging bucket 6, preferably, the depth of the leakage return pipe 15 inserted into the charging bucket punching lower pipeline 16 is close to the inlet of the charging bucket punching lower pipeline 16 connected into the furnace top charging bucket 6 or protrudes out of the inlet and extends into the furnace top charging bucket 6, so that the leakage or the return is facilitated to enter the furnace top charging bucket 6. In some examples, the leak return pipe 15 and the bucket press pipe 15 are inclined at different angles α with respect to the horizontal.
Connect feed bin 10 top still be provided with scraper blade 12 below stove top material loading belt motor 2 for strike off the adhesion and arrive scrape down return charge 14 on the belt 13 to the realization is scraped down return charge 14 and is carried out online recycle through connecing feed bin 10.
In some examples, the bucket punching pipeline comprises a bucket punching upper pipeline 16 arranged in an inclined mode and a bucket punching upper pipeline 17 arranged in a horizontal mode, the bucket punching valve 8 is arranged on the bucket punching upper pipeline 17 arranged in the horizontal mode, the bucket punching valve 8 is located on the bucket punching upper pipeline 17, the leaking return pipe 15 is communicated with the bucket punching pipeline, and the side, away from the top bucket 6, of the bucket punching upper pipeline 17 is far away, so that the bucket punching valve 8 is arranged on the upper portion of the bucket punching upper pipeline 16 arranged in an inclined mode, and the cleaning of leaking materials and returning materials is facilitated.
In a second aspect, the present application provides an online leaked material recycling method, which uses the online leaked material recycling device as described above to implement online leaked material recycling, and the leaked material recycling operation is performed when the top leaked material 3 of the receiving bin 10 reaches the set mass of 1800 and 2200kg, where the set mass may be 1800kg, 1900kg, 2000kg, 2100kg, 2200kg, etc., and is preferably 2000 kg. Illustratively, the set mass is determined by marking the receiving bin 10 and estimating the weight of the charge based on the position of the charge.
Treat normal heat in the furnace top charging bucket 6 just after the furnace charge 1 put into blast furnace 7 furnace 6 with under 7 inside in isolated state of blast furnace, open leak material valve 9, connect in the feed bin 10 leak material 3 passes through leak material return pipe 15 gets into the furnace top charging bucket 6, then, close leak material valve 9 opens go up seal valve 11, will in the blast furnace top receives hopper 4 furnace charge 1 puts into furnace top charging bucket 6, puts into furnace top charging bucket 6 furnace charge 1 with leak material 3's quality ratio control is to setting for proportion 15: 1-20: after 1, wherein the set ratio is optionally 15: 1. 16:1, 17:1, 18:1, 19:1, 20: 1, stopping the charging of the burden 1, and then distributing the mixed burden into a blast furnace 7.
The small leakage particles are relatively small and contain a large amount of dust, if the small particles enter the blast furnace to distribute materials after being directly fed into the feeding tank, the small particles have small problems, the dust generation amount is large, the feeding amount is deviated, the small particles cannot be directly used for distributing materials of the furnace, the air permeability of the furnace burden can be influenced, therefore, after the leakage materials and the return materials are distributed into the charging tank, the normal furnace burden is distributed on the charging tank, the proportion of the leakage materials is reduced, the leakage materials and the normal materials are mixed and distributed to meet the requirement of the distribution of the blast furnace, the online direct recycling of the leakage materials is realized, the influence on the blast furnace sequence caused by the overlow leakage particle size is avoided, the air permeability of the blast furnace is guaranteed, and the smooth operation of the furnace burden of the blast furnace is guaranteed. The material leakage in the material receiving hopper is controlled to be within a proper range, the material leakage and the material returning are controlled to directly recycle, the impact on the original pressure equalizing system is small as much as possible, otherwise, the pressure equalizing system pipeline is easy to cause segregation under the heavy load condition, and the pressure equalizing pipeline is damaged. The mass ratio of the furnace burden 1 to the leaked material 3 put into the furnace top charging bucket 6 is controlled to be in a proper range, so that the leaked material and the returned material can be continuously returned and utilized, and the smooth operation of the blast furnace is basically not influenced.
In some examples, before the leaking material valve 9 is opened and the leaking material 3 in the receiving bin 10 enters the charging bucket 6 through the leaking material returning pipe 15, the step of opening the upper sealing valve 11 to place the charging material 1 in the receiving hopper 4 at the top of the blast furnace into the charging bucket 6 is added. And then, the leaked materials 3 enter the furnace top charging bucket 6 through the leaked material return pipe 15, then, the leaked material valve 9 is closed, the upper sealing valve 11 is opened, the furnace materials 1 in the blast furnace top receiving bucket 4 are put into the furnace top charging bucket 6, and the mass ratio of the furnace materials 1 to the leaked materials 3 put into the furnace top charging bucket 6 is controlled to be 15: 1-20: after 1, wherein the set ratio is optionally 15: 1. 16:1, 17:1, 18:1, 19:1, 20: 1, stopping the charging of the burden 1, and then distributing the mixed burden into a blast furnace 7.
The method comprises the steps of distributing normal furnace materials at the bottom of a charging bucket, then distributing leakage materials and return materials with fine granularity on the normal furnace materials, and then distributing the normal furnace materials on the leakage materials, namely a three-layer distributing mode of the normal furnace materials, the leakage materials and the normal furnace materials is simulated and close to a normal furnace material structure as much as possible, so that the problems that the leakage materials and the return materials are small and cannot be directly recycled are solved, the effect of optimizing the distribution is achieved, the normal furnace materials are arranged at the bottom layer, and the problems that the leakage materials and the return materials are directly recycled, so that the lower sealing valve and other parts entering a blast furnace are bonded or are not easy to clean and the like are solved.
In some examples, when the leaking material 3 is bonded with the material receiving bin 10 and/or the leaking material pipeline, after the leaking material 3 in the material receiving bin 10 is completely put into the furnace top charging bucket 6, the material leaking valve 9 is in an open state, the furnace top charging bucket pressure relief valve 5 is closed, the charging bucket punching valve 8 is opened, high-pressure nitrogen is introduced to purge the charging bucket punching pipeline and the material receiving bin 10 for 10-20 seconds, when the pipeline is purged and the material receiving bin is connected, the furnace top charging belt motor 2 is in a stop operation state, and the furnace top dust removal system is in an operation state. By the above-mentioned high-pressure nitrogen purging, sticking of the leakage 3 to the receiving bin 10 and/or the leakage pipeline can be avoided.
Example one
A material receiving bin 10 is horizontally and additionally arranged below the furnace top feeding belt motor 2 and a blast furnace top receiving bin 4, and the material receiving bin 10 is marked. Connect feed bin 10 to make with the steel sheet, inboard four sides are with the rubber skin of bolt fastening one layer thickness 10mm, the long limit of upper shed opening is 1.8 meters, the minor face is 0.6 meters, degree of depth 1.5 meters, connect feed bin 10 to be four sides cone structure, the cone angle is 60, connect feed bin 10 lower part to install hourglass material valve 9 additional, this valve is hydraulic control, install diameter 150mm hourglass material return pipe 15 additional below the valve, pipeline inclination 60 for carry connect the material in feed bin 10, this pipeline dock on blast furnace material jar punching press pipeline 16.
The method comprises the following specific steps of starting to receive leaked materials after the equipment is modified, wherein the leaked material receiving bin 10 is full of coke and ore mixture to a marking line, namely, the leaked materials are returned and utilized on line when the furnace top leaked materials 3 of the receiving bin 10 reach the set mass of 2000 kg:
step one, after the furnace burden 1 of the normal heat in the furnace top charging bucket 6 is put into a blast furnace 7 for smelting and the interior of the furnace top charging bucket 6 and the blast furnace 7 are in an isolated state, opening a pressure relief valve 5 of the furnace top charging bucket for pressure relief, opening a material leakage valve 9 after the pressure of the furnace top charging bucket 6 is normal pressure, and enabling the leaked material in the material receiving bin 10 to enter the furnace top charging bucket 6 through a material leakage return pipe 15;
step two, after all the leaked materials enter the furnace top charging bucket 6, closing the material leaking valve 9, opening the upper sealing valve 11, putting the furnace materials 1 in the blast furnace top receiving bucket 4 into the furnace top charging bucket 6, and stopping putting the furnace materials after the mass ratio of the furnace materials 1 put into the furnace top charging bucket 6 to the leaked materials and the returned materials is controlled to be 16: 1;
and step three, closing the furnace top charging bucket pressure relief valve 5, opening the charging bucket stamping valve 8, supplementing the pressure of the furnace top charging bucket 6 to be the same as the pressure in the blast furnace, and then distributing the mixed furnace burden into the blast furnace.
Example two
The equipment modification mode is the same as that of the first embodiment, after the equipment modification, the leaked material starts to be connected, the leaked material connecting bin 10 is filled with coke and ore mixture to a marking line, namely, the specific steps of the method for on-line returning and utilizing the leaked material when the furnace top leaked material 3 of the connecting bin 10 reaches the set mass of 2000kg are as follows:
step one, after the furnace burden 1 of a normal heat in the furnace top charging bucket 6 is placed into a blast furnace 7 for smelting, and the interior of the furnace top charging bucket 6 and the blast furnace 7 is in an isolated state, opening the furnace top charging bucket pressure relief valve 5 for pressure relief, opening the upper sealing valve 11 after the pressure of the furnace top charging bucket 6 is normal pressure, placing part of the furnace burden 1 in the blast furnace top receiving hopper 4 into the charging bucket 6, then closing the upper sealing valve 11, opening the material leakage valve 9 again, and enabling the material leakage in the material receiving bin 10 to enter the furnace top charging bucket 6 through the material leakage return pipe 15;
step two, after all the leaked materials enter the furnace top charging bucket 6, closing the material leaking valve 9, opening the upper sealing valve 11 again, putting the furnace materials 1 in the blast furnace top receiving bucket 4 into the furnace top charging bucket 6, controlling the mass ratio of the furnace materials 1 (the sum of the furnace materials added twice in the step one and the step two) put into the furnace top charging bucket 6 to be 15:1, and stopping putting the furnace materials;
and step three, closing the furnace top charging bucket pressure relief valve 5, opening the charging bucket stamping valve 8, supplementing the pressure of the furnace top charging bucket 6 to be the same as the pressure in the blast furnace, and then distributing the mixed furnace burden into the blast furnace.
By the leakage material online return utilization device and the leakage material online return utilization method, the device is simple in structure, the return utilization method is easy to operate, leakage material and return material can be directly returned and utilized online, waste of ore and coke resources is reduced, and raw material cost is reduced.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described above with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the above detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the present application, all the embodiments, implementations, and features of the present application may be combined with each other without contradiction or conflict. In the present application, conventional equipment, devices, components, etc. are either commercially available or self-made in accordance with the present disclosure. In this application, some conventional operations and devices, apparatuses, components are omitted or only briefly described in order to highlight the importance of the present application.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An online leaked material return utilization device comprises a furnace top charging bucket, a blast furnace top receiving bucket, a furnace top charging bucket pressure relief valve, a charging bucket stamping pipeline, an upper sealing valve and a charging bucket stamping valve; it is characterized by also comprising:
and the material receiving bin is arranged adjacent to the receiving hopper on the top of the blast furnace in parallel, the material receiving bin is communicated with the material tank punching pipeline through a material leakage return pipe, and the material leakage valve between the material receiving bin and the material leakage return pipe is controlled to return the material leakage on line for utilization.
2. The online leaked material recycling device of claim 1, wherein the bucket punching pipelines comprise a bucket punching upper pipeline and a bucket punching lower pipeline, and the bucket punching lower pipeline is obliquely arranged.
3. The online leaked material return utilizing device according to claim 2, wherein the leaked material return pipe is communicated with the bucket punching lower pipeline, has a diameter smaller than that of the bucket punching lower pipeline, is disposed in an inclined manner, and is inserted into the inclined bucket punching lower pipeline.
4. The leaked material on-line return utilization device according to claim 3, wherein the leaked material return pipe and the punching lower pipeline of the charging bucket are inclined at the same or different inclination angles α of the pipelines relative to the horizontal plane, and the inclination angle α is 45 ° to 65 °.
5. The online leaked material recycling device according to claim 1, wherein the receiving bin is located below a charging belt motor on the furnace top, the opening width of the receiving bin is larger than the width of a belt for transporting the furnace charge, and scraping plates for scraping off the scraped returned material adhered to the belt are further arranged above the receiving bin and below the charging belt motor on the furnace top.
6. The online leaked material recycling device according to claim 2, wherein the bucket punching valve is disposed on the bucket punching upper pipe horizontally disposed, and the bucket punching valve is disposed on the bucket punching upper pipe on a side away from the bucket where the leaked material returning pipe is communicated with the bucket punching pipe.
7. A method for on-line returning and utilizing leaked materials, which is realized by the on-line returning and utilizing device for leaked materials as claimed in any one of claims 1 to 6, it is characterized in that when the leaked materials of the material receiving bin reach the set quality, after the furnace materials of the normal heat in the furnace top charging bucket are put into the blast furnace and the furnace top charging bucket is in an isolated state with the interior of the blast furnace, the material leakage valve is opened, the leaked materials in the material receiving bin enter the furnace top charging bucket through the material leakage return pipe, and then, closing the material leakage valve, opening the upper sealing valve, putting the furnace burden in the blast furnace top receiving hopper into the furnace top charging bucket, controlling the mass ratio of the furnace burden put into the furnace top charging bucket to a set ratio, stopping putting the furnace burden, and then distributing the mixed furnace burden into the blast furnace.
8. The online leaked material recycling method as claimed in claim 7, wherein the set mass is 1800-2200 kg; the set proportion is 15: 1-20: 1.
9. the online leaked material return utilizing method according to claim 7, wherein the step of opening the upper sealing valve to place the burden in the receiving hopper at the top of the blast furnace into the charging bucket is added before the leaked material in the receiving hopper enters the charging bucket through the leaked material return pipe by opening the leaked material valve.
10. The leaked material online return utilization method according to claim 7, wherein the method for performing leaked material online return utilization when the leaked material of the receiving bin reaches a set quality comprises the following specific steps:
step one, after the furnace burden of a normal heat in a furnace top charging bucket is placed into a blast furnace and the furnace top charging bucket is in an isolated state with the inside of the blast furnace, opening a pressure release valve of the furnace top charging bucket for pressure release, opening a material leakage valve after the pressure of the furnace top charging bucket is normal pressure, and enabling the material leakage in a material receiving bin to enter the furnace top charging bucket through a material leakage return pipe;
step two, after all the leaked materials enter the furnace top charging bucket, closing the material leaking valve, opening the upper sealing valve, putting the furnace materials in the blast furnace top receiving bucket into the furnace top charging bucket, and stopping putting the furnace materials after the mass ratio of the furnace materials put into the furnace top charging bucket to the leaked materials is controlled to a set ratio to obtain mixed furnace materials;
step three, closing the pressure relief valve of the furnace top charging bucket, opening the charging bucket punching valve, supplementing the pressure of the furnace top charging bucket to be the same as the pressure in the blast furnace, and then distributing the mixed furnace burden into the blast furnace;
optionally, when the leaking material is bonded with the material receiving bin and/or the leaking material pipeline, after the leaking material in the material receiving bin is completely put into the furnace top charging bucket, the leaking material valve is in an open state, the furnace top charging bucket pressure release valve is closed, the charging bucket punching valve is opened, high-pressure nitrogen is led to blow the charging bucket punching pipeline and the material receiving bin for 10-20 seconds, when the pipeline is blown and the material receiving bin is blown, the furnace top charging belt motor is in a stop operation state, and the furnace top dust removal system is in an operation state.
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| CN202110678954.8A CN113403439B (en) | 2021-06-18 | 2021-06-18 | Leaked material online return utilization device and online return utilization method |
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| CN202110678954.8A CN113403439B (en) | 2021-06-18 | 2021-06-18 | Leaked material online return utilization device and online return utilization method |
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| CN113403439B (en) | 2022-10-28 |
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