CN214934074U - Pneumatic conveying equipment for return ores and return cokes for iron-making blast furnace - Google Patents
Pneumatic conveying equipment for return ores and return cokes for iron-making blast furnace Download PDFInfo
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- CN214934074U CN214934074U CN202121377447.2U CN202121377447U CN214934074U CN 214934074 U CN214934074 U CN 214934074U CN 202121377447 U CN202121377447 U CN 202121377447U CN 214934074 U CN214934074 U CN 214934074U
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Abstract
The utility model relates to a return-to-mine and coke return pneumatic conveying device for an iron-making blast furnace, which comprises a blowing mechanism and a return-to-mine and return-to-slag buffer bin, wherein the blowing mechanism is provided with a controller; the jetting mechanism includes that the blast furnace return slag storehouse returns the ore deposit, the jetting jar, be equipped with first feeding valves between blast furnace return slag storehouse and the jetting jar, first feeding valves is connected with the controller, the intercommunication has first balanced gas circuit between blast furnace return slag storehouse and the jetting jar, be equipped with first calotte valve on the first balanced gas circuit, the discharge opening has been seted up to the jetting jar bottom, vertical rotary feeder is installed to discharge opening department, the intercommunication has second balanced gas circuit between jetting jar and the vertical rotary feeder, be linked together through the discharging pipe between vertical rotary feeder's the bottom and the return slag surge bin of returning the ore deposit, be equipped with second calotte valve on the discharging pipe, the one end that the discharging pipe deviates from the return slag surge bin of returning the ore deposit has the jetting pipeline through the joint intercommunication. The utility model discloses conveying efficiency is high, and area is little, easy to assemble, maintenance, and use cost is low, and the facilitate promotion is used.
Description
Technical Field
The utility model belongs to the technical field of nonferrous metallurgy, in particular to a return mine and coke return pneumatic conveying device for an iron-making blast furnace.
Background
Blast furnace iron making is an important step in steel production, in which sintered ore, coke, and a flux (limestone) for slag making are charged from the top of a blast furnace, and preheated air is blown into the blast furnace from tuyeres located along the periphery of the furnace at the lower part of the blast furnace. Carbon in an auxiliary fuel such as coke at a high temperature is burned with oxygen blown into the air to generate carbon monoxide, oxygen in iron ore is removed during the rise in the furnace, iron is reduced to obtain iron, the smelted molten iron is discharged from an iron notch, and unreduced impurities in the iron ore are combined with a flux such as limestone to generate slag, and the slag is discharged from the slag notch. The sintered ore and the coke are used as main raw materials for blast furnace smelting, and are screened before entering the blast furnace, only the sintered ore and the coke with the particle size larger than 5mm are allowed to enter the blast furnace, and the sintered ore and the coke with the particle size smaller than 5mm are required to be conveyed to a buffer bin by ore return coke return equipment for storage, and then are conveyed to a batching room for processing and utilization. Wherein, the sintered ore with the grain size of less than 5mm is made into large-grain sintered ore by a sintering process and then is put into the blast furnace for use, and the coke with the grain size of less than 5mm is used as a mixture in the mixture chamber. In the prior art, equipment such as a return belt, a bucket elevator and the like is often adopted for carrying out the operations of returning ores and coke. During blast furnace production, the arrangement of return ore belt, bucket elevator is corresponding with the blast furnace, and every blast furnace all corresponds one set of return ore, returns burnt equipment promptly, and this kind of mode of setting not only returns ore, returns burnt inefficiency, and area is big moreover, and total investment is high, and equipment failure rate is also more, and equipment fixing, maintenance are complicated, and manufacturing cost is high, and the practicality is not strong.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ironmaking is return-ore deposit and return burnt pneumatic conveyor for the ironmaking blast furnace among the prior art has the technical problem that conveying efficiency is low, equipment area is big, manufacturing cost is high with returning burnt equipment to return-ore deposit.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace comprises an injection mechanism and a return ore and return slag buffer bin which are arranged at intervals, wherein a controller is arranged on the injection mechanism; the blowing mechanism comprises a blast furnace return slag bin and a blowing tank which are sequentially arranged from top to bottom at intervals, a first feeding valve group for communicating or disconnecting the blast furnace return slag bin and the blowing tank is arranged between the blast furnace return slag bin and the blowing tank, the first feeding valve group is connected with the controller, a first balance gas circuit for balancing the gas pressure between the blast furnace return slag bin and the blowing tank is communicated between the blast furnace return slag bin and the blowing tank, a first dome valve is arranged on the first balance gas circuit, a discharge opening is formed in the bottom of the blowing tank, a vertical rotary feeder communicated with the inside of the blowing tank is arranged at the discharge opening, a second balance gas circuit for balancing the gas pressure between the blowing tank and the vertical rotary feeder is communicated between the blowing tank and the vertical rotary feeder, the bottom of the vertical rotary feeder is communicated with the return slag buffer bin through a discharge pipe, and a second dome valve is arranged on the discharge pipe, and one end of the discharge pipe, which is far away from the return-ore and return-slag buffer bin, is communicated with a blowing pipeline used for blowing air into the discharge pipe through a joint.
Preferably, the first feeding valve group comprises a manual gate valve and a feeding dome valve, the manual gate valve is connected to the bottom of the return slag bin of the blast furnace, the feeding dome valve is connected to the top of the injection tank, and a flexible joint is connected between the manual gate valve and the feeding dome valve.
Preferably, the second balance air path comprises a balance pipe, the top end of the balance pipe is communicated with the blowing tank, the bottom end of the balance pipe is communicated with the vertical rotary feeder, and the balance pipe is communicated with a first air injection branch pipe used for blowing air into the balance pipe through a joint.
Preferably, the jetting pipeline includes the second jet-propelled branch pipe that is linked together with the discharging pipe, and the outside of jetting jar is provided with the gas holder, and the intercommunication has the jet-propelled house steward that is used for to the inside conveying gas of first jet-propelled branch pipe, second jet-propelled branch pipe on the gas holder, and the one end that first jet-propelled branch pipe deviates from the balance pipe, the one end that the second jet-propelled branch pipe deviates from the discharging pipe all is linked together with the jet-propelled house steward.
Preferably, the bottom of the injection tank is communicated with a fluidization gas path for fluidizing the material in the injection tank, and the other end of the fluidization gas path is communicated with the gas injection main pipe.
Preferably, the first branch gas injection pipe, the second branch gas injection pipe and the fluidizing gas circuit are respectively provided with a pneumatic valve and a check valve, and the main gas injection pipe is provided with a manual stop valve and a filter.
Preferably, a first high material level meter is installed above the blast furnace return slag bin, a low material level meter is installed below the blast furnace return slag bin, and a second high material level meter is installed above the injection tank.
The utility model has the advantages that: through set up jetting mechanism in return fine return slag surge bin outside, through the inside jetting material of jetting mechanism to return fine return slag surge bin, be used for realizing the purpose of supplying powdered ore or coke to return fine return slag surge bin, jetting mechanism includes the blast furnace return fine return slag bin that sets gradually from the top down, the jetting jar, the slag bin is returned to the blast furnace return fine return, the jetting jar is with first feeding valves, vertical rotary feeder and jetting pipeline cooperation are used, powdered ore or coke loop through the blast furnace return fine return slag bin, after the jetting jar, get into inside the vertical rotary feeder, and carry out fluidization through the inside material of jetting pipeline with the vertical rotary feeder, spout to return fine return slag surge bin inside. Compare with traditional returning mine belt, bucket elevator conveying equipment, the utility model discloses material conveying's is efficient, and area is little, and equipment fixing, maintenance are simple, low in production cost, and the facilitate promotion is used. And the mineral powder and the coke are fully fluidized before entering the return-ore return-slag buffer bin, so that the injection precision is high, the injection effect is good, and the automation degree is high.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
figure 3 is a schematic structural diagram of the connection of the blowing pipeline and the blowing tank.
Reference numerals: 1-blowing mechanism, 2-returning and returning slag buffer bin, 3-controller, 4-blast furnace returning and returning slag bin, 5-blowing tank, 6-first feeding valve group, 7-first balance gas circuit, 8-first dome valve, 9-discharge port, 10-vertical rotary feeder, 11-second balance gas circuit, 12-discharge pipe, 13-second dome valve, 14-manual gate valve, 15-feeding dome valve, 16-flexible joint, 17-balance pipe, 18-first air injection branch pipe, 19-second air injection branch pipe, 20-air storage tank, 21-air injection main pipe, 22-fluidization gas circuit, 23-pneumatic valve, 24-check valve, 25-manual stop valve, 26-filter, 27-first high material level meter, 28-low material level meter and 29-second high material level meter.
Detailed Description
As shown in figure 1, the utility model comprises a blowing mechanism 1 arranged at intervals, a return-ore return-slag buffer bin 2, and a controller 3 arranged on the blowing mechanism 1. The blowing mechanism 1 comprises a blast furnace return slag bin 4 and a blowing tank 5 which are sequentially arranged from top to bottom at intervals, a first feeding valve group 6 used for communicating or disconnecting the blast furnace return slag bin 4 and the blowing tank 5 is arranged between the blast furnace return slag bin 4 and the blowing tank 5, the first feeding valve group 6 is connected with the controller 3, and the controller 3 controls the first feeding valve group 6 to be opened and closed to complete automatic feeding operation. The blast furnace return slag bin 4 and the blowing tank 5 are communicated with a first balance air path 7 used for balancing air pressure between the blast furnace return slag bin 4 and the blowing tank 5, a first dome valve 8 is arranged on the first balance air path 7, a discharge opening 9 is formed in the bottom of the blowing tank 5, a vertical rotary feeder 10 communicated with the inside of the blowing tank 5 is installed at the discharge opening 9, a second balance air path 11 used for balancing air pressure between the blowing tank 5 and the vertical rotary feeder 10 is communicated between the blowing tank 5 and the vertical rotary feeder 10, the bottom of the vertical rotary feeder 10 is communicated with the return slag buffer bin 2 through a discharge pipe 12, a second dome valve 13 is arranged on the discharge pipe 12, and a blowing pipeline used for blowing air to the inside of the discharge pipe 12 is communicated with one end, deviating from the return slag buffer bin 2, of the discharge pipe 12 through a connector. Mineral powder and coke sequentially pass through the blast furnace return slag return bin 4 and the blowing tank 5, then enter the vertical rotary feeder 10, and fluidize and blow solid materials in the vertical rotary feeder 10 to the inside of the return slag buffer bin 2 through a blowing pipeline.
Preferably, as shown in fig. 2, the first feeding valve group 6 comprises a manual gate valve 14 and a feeding dome valve 15, the manual gate valve 14 is connected to the bottom of the blast furnace return slag bin 4, the feeding dome valve 15 is connected to the top of the injection tank 5, and a flexible joint 16 is connected between the manual gate valve 14 and the feeding dome valve 15. The feeding dome valve 15 is connected with the controller 3, when the material is conveyed to the blowing tank 5, the manual gate valve 14 is opened, the controller 3 controls the feeding dome valve 15 to be opened, the material sequentially passes through the manual gate valve 14 and the feeding dome valve 15 to enter the blowing tank 5, and the automation degree is high. And set up the flexible festival 16 between the two, compare manual gate valve 14 and the feeding dome valve 15 direct connection, the flexible festival 16 can reduce the assembly precision between manual gate valve 14 and the feeding dome valve 15, compensate the clearance between the two, and guarantee the leakproofness of the two junction. The flexible joint 16 is a tubular structure with corrugated walls.
Preferably, as shown in fig. 3, the second balancing air path 11 comprises a balancing pipe 17, the top end of the balancing pipe 17 is communicated with the blowing tank 5, the bottom end of the balancing pipe 17 is communicated with the vertical rotary feeder 10, and the balancing pipe 17 is communicated with a first air injection branch pipe 18 for blowing air into the balancing pipe 17 through a joint. The first air injection branch pipe 18 blows air into the balance pipe 17, and the balance pipe 17 is used for balancing air pressure between the vertical rotary feeder 10 and the blowing tank 5, so that the problem that the air pressure in the vertical rotary feeder 10 is large and the material output in the blowing tank 5 is not facilitated is avoided.
Preferably, as shown in fig. 1, the blowing pipeline comprises a second branch gas injection pipe 19 communicated with the discharge pipe 12, the second branch gas injection pipe 19 is provided with a detection assembly, the detection assembly comprises a pressure transmitter and a pressure gauge, and the pressure transmitter is used for detecting the gas pressure in the pipe and displaying the gas pressure on the pressure transmitter, so that a user can conveniently monitor the gas pressure in real time. The outside of the injection tank 5 is provided with a gas storage tank 20, compressed gas is stored in the gas storage tank 20, and the gas storage tank 20 is communicated with a gas injection main pipe 21 for conveying gas to the inside of the first gas injection branch pipe 18 and the second gas injection branch pipe 19. As shown in FIG. 3, the end of the first branch gas injection pipe 18 facing away from the equalizing pipe 17 and the end of the second branch gas injection pipe 19 facing away from the outlet pipe 12 are both connected to a gas injection main pipe 21. Compressed gas is supplied to the interior of the second gas injection branch pipe 19 through the gas storage tank 20, the second gas injection branch pipe 19 is communicated with the discharge pipe 12, and the second gas injection branch pipe 19 injects the compressed gas into the discharge pipe 12, so that the rapid injection of materials in the discharge pipe is ensured.
Preferably, as shown in fig. 3, a fluidizing gas path 22 for fluidizing the material inside the blowing tank 5 is communicated with the bottom of the blowing tank 5, and the other end of the fluidizing gas path 22 is communicated with the gas injection main pipe 21. Through setting up fluidization gas circuit 22, fluidization gas circuit 22 jets gas to jetting jar 5 lower part, fluidizes the material in jetting jar 5, prevents the material caking in jetting jar 5, accelerates the flow of material, improves conveying efficiency.
Preferably, as shown in fig. 3, the first branch gas injection pipe 18, the second branch gas injection pipe 19 and the fluidizing gas circuit 22 are provided with a pneumatic valve 23 and a check valve 24, and the main gas injection pipe 21 is provided with a manual stop valve 25 and a filter 26. The pneumatic valve 23 and the manual stop valve 25 can control the on-off of the pipelines and control whether the gas is conveyed or not, the filter 26 can filter impurities in the gas, so that the gas in each pipeline is more pure, and the check valve 24 can prevent the gas from flowing backwards.
Preferably, as shown in fig. 1 and 3, a first high level gauge 27 is installed above the blast furnace return slag bin 4, a low level gauge 28 is installed below the blast furnace return slag bin 4, and a second high level gauge 29 is installed above the injection tank 5. The volume of the materials in the blast furnace return slag bin 4 and the blowing tank 5 can be monitored, and the materials can be conveniently and timely supplemented.
The utility model discloses a theory of operation and working process: when the device is used, a feeding hole in the top of the blast furnace return slag bin 4 is opened, mineral powder and coke enter the blast furnace return slag bin 4 through the feeding hole, and when the material quantity in the blast furnace return slag bin 4 covers the first high material level meter 27, the controller 3 controls the feeding hole to be closed and stops feeding. Open manual push-pull valve 14, feeding dome valve 15, the material loops through manual push-pull valve 14, feeding dome valve 15 gets into inside jetting jar 5 to open first dome valve 8 on the first balanced gas circuit 7, make the blast furnace return mine return slag storehouse 4, first dome valve 8 and jetting jar 5 are linked together, balanced three's atmospheric pressure, when the material volume in the jetting jar 5 covers the high charge level indicator 29 of second, 3 control feeding dome valves 15 of controller are closed, stop the material loading, and close first dome valve 8. The material that gets into inside jetting jar 5 flows down inside the cavity of vertical rotary feeder 10, open second dome valve 13 on discharging pipe 12, fluidization gas circuit 22 jets gas to the material in jetting jar 5 and fluidizes, second jet-propelled branch pipe 19 jets compressed gas to discharging pipe 12 in, guarantee that the material in discharging pipe 12 spouts fast, blow to the inside of balance pipe 17 through first jet-propelled branch pipe 18, balance pipe 17 is used for balancing the atmospheric pressure between vertical rotary feeder 10 and jetting jar 5, avoid being unfavorable for the output of the material in jetting jar 5 because of the atmospheric pressure in vertical rotary feeder 10 is great, the material that gets into inside discharging pipe 12 jets to returning ore deposit and returns sediment surge bin 2 inside under the effect of the inside air of second jet-propelled branch pipe 19, accomplish the transport of powdered ore, coke.
The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.
Claims (7)
1. A kind of ironmaking blast furnace returns the ore deposit and returns the burnt pneumatic conveying equipment, characterized by that: the device comprises an injection mechanism and a return-ore return-slag buffer bin which are arranged at intervals, wherein a controller is arranged on the injection mechanism; the blowing mechanism comprises a blast furnace return slag bin and a blowing tank which are sequentially arranged from top to bottom at intervals, a first feeding valve group for communicating or disconnecting the blast furnace return slag bin and the blowing tank is arranged between the blast furnace return slag bin and the blowing tank, the first feeding valve group is connected with the controller, a first balance gas circuit for balancing the gas pressure between the blast furnace return slag bin and the blowing tank is communicated between the blast furnace return slag bin and the blowing tank, a first dome valve is arranged on the first balance gas circuit, a discharge opening is formed in the bottom of the blowing tank, a vertical rotary feeder communicated with the inside of the blowing tank is arranged at the discharge opening, a second balance gas circuit for balancing the gas pressure between the blowing tank and the vertical rotary feeder is communicated between the blowing tank and the vertical rotary feeder, the bottom of the vertical rotary feeder is communicated with the return slag buffer bin through a discharge pipe, and a second dome valve is arranged on the discharge pipe, and one end of the discharge pipe, which is far away from the return-ore and return-slag buffer bin, is communicated with a blowing pipeline used for blowing air into the discharge pipe through a joint.
2. The pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace according to claim 1, which is characterized in that: the first feeding valve group comprises a manual gate valve and a feeding dome valve, the manual gate valve is connected to the bottom of the blast furnace return slag bin, the feeding dome valve is connected to the top of the injection tank, and a flexible joint is connected between the manual gate valve and the feeding dome valve.
3. The pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace according to claim 2, which is characterized in that: the second balance air path comprises a balance pipe, the top end of the balance pipe is communicated with the blowing tank, the bottom end of the balance pipe is communicated with the vertical rotary feeder, and a first air injection branch pipe used for blowing air into the balance pipe is communicated with the balance pipe through a connector.
4. The pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace according to claim 3, which is characterized in that: the jetting pipeline comprises a second gas injection branch pipe communicated with the discharge pipe, a gas storage tank is arranged outside the jetting tank, a gas injection main pipe used for conveying gas to the inside of the first gas injection branch pipe and the inside of the second gas injection branch pipe is communicated with the gas storage tank, and one end of the first gas injection branch pipe, which deviates from the balance pipe, and one end of the second gas injection branch pipe, which deviates from the discharge pipe, are both communicated with the gas injection main pipe.
5. The pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace as claimed in claim 4, which is characterized in that: the bottom of the injection tank is communicated with a fluidization gas path used for fluidizing materials in the injection tank, and the other end of the fluidization gas path is communicated with the gas injection main pipe.
6. The pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace according to claim 5, which is characterized in that: pneumatic valves and check valves are arranged on the first air injection branch pipe, the second air injection branch pipe and the fluidization air path, and a manual stop valve and a filter are arranged on the air injection main pipe.
7. The pneumatic conveying equipment for the return ores and the return cokes for the iron-making blast furnace according to any one of claims 1 to 6, which is characterized in that: a first high material level meter is arranged above the blast furnace return slag bin, a low material level meter is arranged below the blast furnace return slag bin, and a second high material level meter is arranged above the injection tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121377447.2U CN214934074U (en) | 2021-06-21 | 2021-06-21 | Pneumatic conveying equipment for return ores and return cokes for iron-making blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121377447.2U CN214934074U (en) | 2021-06-21 | 2021-06-21 | Pneumatic conveying equipment for return ores and return cokes for iron-making blast furnace |
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| Publication Number | Publication Date |
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| CN214934074U true CN214934074U (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121377447.2U Active CN214934074U (en) | 2021-06-21 | 2021-06-21 | Pneumatic conveying equipment for return ores and return cokes for iron-making blast furnace |
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| CN (1) | CN214934074U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114701862A (en) * | 2022-04-13 | 2022-07-05 | 龙佰禄丰钛业有限公司 | Lower slag discharging device and method for chlorination furnace bed waste slag |
| WO2023236170A1 (en) * | 2022-06-10 | 2023-12-14 | 河南瑞德克气力输送设备有限公司 | Solid material constant injection device for smelting furnace |
-
2021
- 2021-06-21 CN CN202121377447.2U patent/CN214934074U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114701862A (en) * | 2022-04-13 | 2022-07-05 | 龙佰禄丰钛业有限公司 | Lower slag discharging device and method for chlorination furnace bed waste slag |
| CN114701862B (en) * | 2022-04-13 | 2023-11-21 | 龙佰禄丰钛业有限公司 | Lower deslagging device and method for waste residues in chlorination furnace hearth layer |
| WO2023236170A1 (en) * | 2022-06-10 | 2023-12-14 | 河南瑞德克气力输送设备有限公司 | Solid material constant injection device for smelting furnace |
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