CN214183986U - Iron works is used for sieving device once more to blast furnace return mine - Google Patents
Iron works is used for sieving device once more to blast furnace return mine Download PDFInfo
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- CN214183986U CN214183986U CN202022793134.7U CN202022793134U CN214183986U CN 214183986 U CN214183986 U CN 214183986U CN 202022793134 U CN202022793134 U CN 202022793134U CN 214183986 U CN214183986 U CN 214183986U
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Abstract
The utility model discloses a device that iron works was used for sieving blast furnace return fines once more sets up on the sticky tape transportation route of blast furnace return fines for separate the great sintering deposit of granularity in the blast furnace return fines, include: the feeding chute is n-shaped and consists of a screening chute and a return chute, the upper part of the screening chute is communicated with the upper part of the return chute, the sinter vibrating screen is used for screening the sinter passing through the screening chute, the undersize collecting hopper is used for collecting the sinter passing through the screen holes of the sinter vibrating screen and the sinter flowing out through the return chute, the part of the sinter is conveyed to the sintering proportioning chamber for continuous sintering, and the oversize collecting bin is used for collecting the sinter which does not pass through the screen holes of the sinter vibrating screen; the utility model discloses can avoid the big problem of blast furnace ore return volume that causes because of the big screen sieve aperture of the screening equipment sieve under the blast furnace groove with the ore return volume that reduces to return to the sintering batching room.
Description
Technical Field
The utility model belongs to blast furnace return fine screening field especially relates to a device that iron works is used for sieving again blast furnace return fine in blast furnace iron-making.
Background
The sintering process is a charging material preparation process for blast furnace ironmaking, namely, powdery iron-containing raw materials are sintered into blocky sinter according to the requirements of the blast furnace ironmaking process on the granularity, strength, alkalinity and the like of the iron-containing raw materials. The requirement of the blast furnace on the granularity of the sintered ore is generally 5-150mm, the finished sintered ore produced by the sintering machine is screened by a screening process, the granularity below 5mm is separated and returned to a proportioning chamber to be sintered again before being conveyed to a blast furnace ore tank, but the finished sintered ore is transferred, extruded, collided, moistened and pulverized for many times in the process of conveying the finished sintered ore to the blast furnace ore tank, and a certain amount of sintered ore with the granularity less than 5mm is produced.
And screening equipment is arranged below the blast furnace ore tank, the sintered ore taken out of the ore tank is screened again before being sent to the blast furnace, the sintered ore with the size fraction smaller than 5mm is separated again and returns to the sintering process for sintering again, and the part of the sintered ore with the size fraction smaller than 5mm is called as blast furnace return ore. The amount of return ores of the blast furnace is an important index influencing the sintering manufacturing cost, and the return ores return to the batching chamber to participate in sintering again, so that the unit consumption of energy sources such as solid fuel consumption, power consumption and the like is increased.
Because the screening equipment under the blast furnace groove is worn and torn under continuous operation, the aperture of the screen plate is larger and larger, even damaged, thus a part of sintered ore with the grain size larger than 5mm is mixed into the return ores of the blast furnace, and the yield is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an iron works is used for sieving the device of blast furnace return mine once more to solve because the big problem of the blast furnace return mine volume that causes of screening equipment sieve aperture under the blast furnace groove.
The utility model adopts the following technical scheme: the utility model provides a device that iron works is arranged in sieving once more to blast furnace return fines, sets up on the sticky tape transportation route of blast furnace return fines for the great sintering deposit of granularity in the separation blast furnace return fines, includes:
the feeding chute is n-shaped and consists of a screening chute and a return chute, the upper part of the screening chute is communicated with the upper part of the return chute, the top end of the feeding chute is provided with a feeding port, the feeding port is positioned at the junction of the screening chute and the return chute, the feeding port is positioned below the discharge end of the blast furnace return belt conveyor, the blast furnace return belt conveyor is used for conveying sintered ore for the feeding chute,
a sinter vibrating screen, the screen hole of which is 3-5mm, the feed end of which is communicated with the outlet of the screening chute and is used for screening the sinter passing through the screening chute,
the undersize collecting hopper is positioned below the sinter vibrating screen, is communicated with the lower parts of the screening chute and the return chute, is used for collecting the sinter passing through the screen holes of the sinter vibrating screen and the sinter flowing out through the return chute, and conveys the part of the sinter to the sintering batching chamber for continuous sintering,
and the oversize collection bin is positioned below the sinter vibrating screen, the upper end of the oversize collection bin is provided with a feeding port, the lower end of the oversize collection bin is provided with a discharging port, and the feeding port of the oversize collection bin is communicated with the discharging port of the sinter vibrating screen and is used for collecting the sinter which does not pass through the screen holes of the sinter vibrating screen.
Further, be provided with the switching in the feed chute and turn over the board, the one end that the board was turned over in the switching articulates at screening chute and return fines chute juncture, and the other end is the free end, and the feed chute is provided with hydraulic push rod outward, and hydraulic push rod's one end and the one end fixed connection of baffle, hydraulic push rod are used for promoting the switching to turn over the board for the switching turns over the board and rotates and switch between screening chute and return fines chute with its pin joint, and then blocks the sintering deposit in screening chute or the return fines chute.
Furthermore, the inner diameters of the screening chute or the ore return chute are equal, and the area of the switching turnover plate is smaller than the inner diameter of the screening chute or the ore return chute.
Further, a discharge hole of the oversize collection bin is provided with a fan-shaped valve.
Further, the sinter vibrating screen is of a fully-enclosed structure.
Furthermore, the sieve plate of the sinter vibrating screen is a bar screen.
The utility model has the advantages that: the utility model discloses can isolate the great sintering deposit of granularity in the blast furnace return fines, continue to be used for the blast furnace ironmaking as finished product sintering deposit, perhaps replace the sintering deposit to transport to converter steelmaking process and be used for adjusting molten steel temperature to reduce the return ore volume that returns sintering batching room, avoid the big problem of blast furnace return ore volume that causes because of the big problem of screening equipment sieve aperture under the blast furnace groove.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1. a feeding chute; 2. screening a chute; 3. a return chute; 4. a blast furnace return mine rubber belt conveyor; 5. vibrating screen for sinter; 6. a screen underflow collecting hopper; 7. an oversize collection bin; 8. switching the turning plate; 9. a hydraulic push rod; 10. a fan valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a device that iron works was used for sieving blast furnace return fines once more sets up on the sticky tape transportation route of blast furnace return fines for the great sintering deposit of granularity in the separation blast furnace return fines, as shown in figure 1, collect and fight 6, oversize collection storehouse 7 including feed chute 1, sintering deposit shale shaker 5, undersize.
The feeding chute 1 is n-shaped, the feeding chute 1 is composed of a screening chute 2 and a return chute 3, the upper portion of the screening chute 2 is communicated with the upper portion of the return chute 3, a feeding port is formed in the top end of the feeding chute 1 and is located at the junction of the screening chute 2 and the return chute 3, the feeding port is located below the discharge end of the blast furnace return belt conveyor 4, and the blast furnace return belt conveyor 4 is used for conveying sintered ore passing through screening equipment under the blast furnace for the feeding chute 1.
The sieve mesh of agglomerate shale shaker 5 is 3-5mm, the pan feeding end of agglomerate shale shaker 5 and the export intercommunication of screening chute 2, agglomerate shale shaker 5 is used for sieving the agglomerate through screening chute 2, undersize is collected and is fought 6 and is located agglomerate shale shaker 5 below, undersize is collected and is fought 6 and is linked together with the lower part of screening chute 2 and return chute 3, undersize is collected and is fought 6 and is used for collecting the agglomerate that passes through 5 sieve meshes of agglomerate shale shaker and the agglomerate that flows through return chute 3 to carry this part of agglomerate to the sintering batching room and continue the sintering.
The sinter vibrating screen 5 is of a totally enclosed structure, and because the return ores of the blast furnace are dry and have high dust content, and raise dust is easily generated in the screening process, the structural form of the vibrating screen should be selected to be of a totally enclosed structure, and a corresponding dust removal facility is configured. The sieve plate of the sinter vibrating sieve 5 is a bar sieve, and the sieve holes of the vibrating sieve are very easy to block due to the irregular granularity and high hardness of return ores of the blast furnace, so the vibrating sieve is a bar sieve with high anti-blocking capability.
Oversize collects storehouse 7 and is located 5 below sinter shale shaker, the pan feeding mouth has been seted up to the upper end that storehouse 7 was collected to the oversize, the discharge gate has been seted up to the lower extreme that storehouse 7 was collected to the oversize, the pan feeding mouth that storehouse 7 was collected to the oversize is linked together with the discharge gate of sinter shale shaker 5, storehouse 7 is collected to the oversize is used for collecting the sinter that does not pass through 5 sieve meshes of sinter shale shaker, the sinter that does not pass through sinter shale shaker 5 is collected and is collected storehouse 7 at the oversize, 7 discharge gates in oversize collection storehouse set up sector valve 10, sector valve 10 uses electric power hydraulic pressure as power, realize to the haulage vehicle feed through opening and close of sector valve 10.
Be provided with the switching in the feed chute 1 and turn over board 8, the one end that the switching turned over board 8 articulates at screening chute 2 and 3 juncture of return fines chute, the other end is the free end, feed chute 1 is provided with hydraulic push rod 9 outward, the one end of hydraulic push rod 9 and the one end fixed connection of baffle, hydraulic push rod 9 is used for promoting the switching to turn over board 8, make the switching turn over board 8 with its pin joint rotate and switch between screening chute 2 and return fines chute 3, and then block the sintering deposit in screening chute 2 or the return fines chute 3.
The inner diameters of the screening chute 2 or the return chute 3 are equal, the area of the switching turning plate 8 is smaller than the inner diameter of the screening chute 2 or the return chute 3, whether blast furnace return ore is screened or not needs to be determined according to the requirements on oversize materials, the switching turning plate 8 for determining the flow direction of the blast furnace return ore is arranged in the feeding chute 1 connected with the sinter vibrating screen 5, and the switching turning plate 8 takes a hydraulic push rod 9 of electric power as power. Turn over the flow direction of board 8 decision blast furnace return fines through the switching, when the blast furnace return fines need the screening through the naked eye discovery, turn over board 8 with the switching and block return fines chute 3, make blast furnace return fines flow direction sintering deposit shale shaker 5 participate in the screening, when the blast furnace return fines do not need the screening or need overhaul this device through the naked eye discovery, turn over board 8 with the switching and block screening chute 2, make blast furnace return fines flow direction return fines chute 3, do not participate in the screening, it is carried to sintering batching room and carries out sintering once more directly to collect fill 6 through the undersize.
And screening equipment is arranged below the blast furnace ore tank, the sintered ore taken out of the ore tank is screened again before being sent to the blast furnace, the sintered ore with the size fraction smaller than 5mm is separated again and returns to the sintering process for sintering again, and the part of the sintered ore with the size fraction smaller than 5mm is called as blast furnace return ore. The amount of return ores of the blast furnace is an important index influencing the sintering manufacturing cost, and the return ores return to the batching chamber to participate in sintering again, so that the unit consumption of energy sources such as solid fuel consumption, power consumption and the like is increased.
Because the screening equipment under the blast furnace groove is worn and torn under continuous operation, the aperture of the screen plate is larger and larger, even damaged, thus a part of sintered ore with the grain size larger than 5mm is mixed into the return ores of the blast furnace, and the yield is reduced. The utility model discloses can isolate the great sintering deposit of granularity in the blast furnace return fines, continue to be used for the blast furnace ironmaking as finished product sintering deposit, perhaps replace the sintering deposit to transport to converter steelmaking process and be used for adjusting molten steel temperature to reduce the return ore volume that returns sintering batching room, avoid the big problem of blast furnace return ore volume that causes because of the big problem of screening equipment sieve aperture under the blast furnace groove.
In the converter steelmaking process, a certain amount of sinter is sometimes needed for adjusting the temperature of molten steel, and the requirement on the granularity of the sinter is not very strict; therefore, the sinter in the oversize collecting bin 7 can be used for blast furnace iron making and can also be used for adjusting the temperature of molten steel so as to reduce the amount of return ore to the sintering batching chamber.
Example 1
Set up on the sticky tape transportation circuit of blast furnace return fines the utility model discloses, carry out screening once more to blast furnace return fines, the sieve mesh diameter is 4mm, and the sintering deposit that does not pass through sintering deposit shale shaker 5 is collected and is collected storehouse 7 at oversize, utilizes the fortune car to transport to the place that has the demand, and the blast furnace car receives ore deposit groove or converter raw material yard promptly. The sinter passing through the sinter vibrating screen 5 is collected in an undersize collecting hopper 6 and transported to a sintering batching chamber according to the original line to participate in repeated sintering.
With one 400m2For example, the sintering machine produces about 350 ten thousand tons of sintered ore annually, the ratio of return fine of blast furnace is 15%, and the ratio of return fine of blast furnace annually is about 52.5 ten thousand tons.
Utilize the utility model discloses afterwards, sieve out 10% large size grade return fines and replace finished product sintering deposit in 52.5 ten thousand tons of return fines, increase finished product sintering deposit yield 5.25 ten thousand tons in other words, the manufacturing cost of per ton sintering deposit is calculated according to 120 yuan, and the annual benefit of creating reaches 630 ten thousand yuan.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a device that iron works is arranged in sieving again to blast furnace return fines, its characterized in that sets up on the sticky tape transportation line of blast furnace return fines for the great sintering deposit of granularity in the separation blast furnace return fines includes:
the feeding chute (1) is n-shaped and consists of a screening chute (2) and a return chute (3), the upper part of the screening chute (2) is communicated with the upper part of the return chute (3), a feeding port is formed in the top end of the feeding chute (1), the feeding port is positioned at the junction of the screening chute (2) and the return chute (3), the feeding port is positioned below the discharge end of a blast furnace return belt conveyor (4), and the blast furnace return belt conveyor (4) is used for conveying sintered ore for the feeding chute (1),
a sinter vibrating screen (5) with 3-5mm screen holes, wherein the feed end of the sinter vibrating screen is communicated with the outlet of the screening chute (2) and is used for screening the sinter passing through the screening chute (2),
the undersize collecting hopper (6) is positioned below the sinter vibrating screen (5), is communicated with the lower parts of the screening chute (2) and the return chute (3), is used for collecting the sinter passing through the screen holes of the sinter vibrating screen (5) and the sinter flowing out through the return chute (3), and conveys the part of the sinter to the sintering batching chamber for continuous sintering,
and the oversize material collecting bin (7) is positioned below the sinter vibrating screen (5), a feeding port is formed in the upper end of the oversize material collecting bin, a discharging port is formed in the lower end of the oversize material collecting bin, and the feeding port of the oversize material collecting bin (7) is communicated with the discharging port of the sinter vibrating screen (5) and is used for collecting the sinter which does not pass through the screen holes of the sinter vibrating screen (5).
2. The device for screening the blast furnace return ores again in the iron and steel works according to claim 1, characterized in that a switching flap (8) is arranged in the feeding chute (1), one end of the switching flap (8) is hinged at the junction of the screening chute (2) and the return chute (3), the other end is a free end, a hydraulic push rod (9) is arranged outside the feeding chute (1), one end of the hydraulic push rod (9) is fixedly connected with one end of the baffle, and the hydraulic push rod (9) is used for pushing the switching flap (8), so that the switching flap (8) rotates and switches between the screening chute (2) and the return chute (3) through a hinge point of the switching flap (8), and sintered ores in the screening chute (2) or the return chute (3) are blocked.
3. An apparatus for re-screening of blast furnace return ores in an iron and steel works according to claim 2, characterized in that the inner diameters of the screening chute (2) or the return chute (3) are equal and the area of the switching flap (8) is smaller than the inner diameter of the screening chute (2) or the return chute (3).
4. An apparatus for re-screening of blast furnace return ores in an iron and steel works according to any one of claims 1 to 3, characterized in that the discharge opening of the oversize collection bin (7) is provided with a sector valve (10).
5. An apparatus for re-screening of blast furnace return ores in an iron works according to claim 4, characterized in that the sinter shaker (5) is of a totally enclosed construction.
6. An apparatus for re-screening return ores of a blast furnace in an iron works according to claim 5, wherein the screen plate of the sinter ore vibration screen (5) is a bar screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022793134.7U CN214183986U (en) | 2020-11-27 | 2020-11-27 | Iron works is used for sieving device once more to blast furnace return mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022793134.7U CN214183986U (en) | 2020-11-27 | 2020-11-27 | Iron works is used for sieving device once more to blast furnace return mine |
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| CN214183986U true CN214183986U (en) | 2021-09-14 |
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| CN202022793134.7U Active CN214183986U (en) | 2020-11-27 | 2020-11-27 | Iron works is used for sieving device once more to blast furnace return mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112474292A (en) * | 2020-11-27 | 2021-03-12 | 陕西龙门钢铁有限责任公司 | Device for secondary screening of blast furnace return ores in steel plant |
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2020
- 2020-11-27 CN CN202022793134.7U patent/CN214183986U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112474292A (en) * | 2020-11-27 | 2021-03-12 | 陕西龙门钢铁有限责任公司 | Device for secondary screening of blast furnace return ores in steel plant |
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