CN213493910U - Sintering fuel crushing processing and adding production line - Google Patents
Sintering fuel crushing processing and adding production line Download PDFInfo
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- CN213493910U CN213493910U CN202021246516.1U CN202021246516U CN213493910U CN 213493910 U CN213493910 U CN 213493910U CN 202021246516 U CN202021246516 U CN 202021246516U CN 213493910 U CN213493910 U CN 213493910U
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Abstract
The utility model discloses a sintering fuel crushing processing and adding production line, which comprises a fuel bunker and a sintering machine; a four-roller crusher, a batching and mixing system and a fuel feeding system are sequentially arranged between the fuel bin and the sintering machine according to the production process; a screening device is arranged above the feed end of the four-roller crusher; dust collecting hoods are respectively arranged on the periphery of a feed inlet of the screening device and the periphery of a discharge outlet of the fuel bin; the dust collection cover is connected to the dust collection bin through a pneumatic conveying pipeline; a feeding automobile is parked below the first discharge end of the screening device; the second discharge end of the screening device is connected with the sintering proportioning bin through a fuel feeding system; the third discharge end of the screening device is connected with a four-roller crusher through a feed channel; the utility model discloses a broken processing of sintering fuel and join in marriage and add the production line, sintering fuel crushing quality is good, and sintering in-process fuel utilization effect is good.
Description
Technical Field
The utility model relates to a broken processing of sintering fuel and joining in marriage and add production line belongs to the broken processing of sintering fuel and joins in marriage and add technical field.
Background
In the sintering production process, the following process flows are required: the production preparation, the material preparation, the even mixing and granulation, the material distribution, the ignition, the air draft sintering, the single-roller crushing, the screening and the granule finishing are carried out, and then the product is used by a blast furnace. In the sintering process, the fuel provides heat for the melting, consolidation and ore formation of the mineral powder. The processing and adding process of the fuel is one of main factors influencing the output, quality index and consumption index of the sinter, and good quality-improving and consumption-reducing effects can be obtained in actual production by reasonably controlling the processing granularity and adding flow of the fuel. At present, iron and steel enterprises need to digest part of self-produced dry coke powder and fuel dedusting ash, the crushing quality effect is poor, the sintering process stability is influenced to a certain extent, and the improvement of the quality and indexes of sinter ore is not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a broken processing of sintering fuel and join in marriage with the production line can effectively solve the sintering because of the adapted dry coke powder, the broken quality of sintering fuel that leads to is poor, problem that sintering process fuel utilization effect is poor.
The utility model discloses a sintering fuel crushing processing and adding production line, which comprises a fuel bunker and a sintering machine; a four-roller crusher, a batching and mixing system and a fuel feeding system are sequentially arranged between the fuel bin and the sintering machine according to the production process; the batching and mixing system consists of a sintering batching bin, a primary mixer and a secondary mixer which are connected in sequence; the fuel bin is connected with the four-roller crusher through the feeding mechanism; a screening device is arranged above the feed end of the four-roller crusher; dust collecting hoods are respectively arranged on the periphery of a feed inlet of the screening device and the periphery of a discharge outlet of the fuel bin; the dust hood is connected to the dust collecting bin through the pneumatic conveying pipeline, the fuel dedusting ash is conveyed to the dust collecting bin beside the secondary mixer through the pneumatic conveying pipeline to be used as a fuel secondary additive for standby, the fuel dedusting ash can be redistributed and used, on one hand, the flying dust pollution phenomenon is avoided, on the other hand, the fuel dedusting ash is not mixed with coke powder after falling to the ground, the integral crushing processing efficiency of the fuel can be improved, and the fuel processing quality is improved; a feeding automobile is parked below the first discharge end of the screening device; the second discharge end of the screening device is connected with the sintering proportioning bin through a fuel feeding system; the third discharge end of the screening device is connected with a four-roller crusher through a feed channel; the discharge end of the four-roller crusher is connected with the sintering proportioning bin through a fuel feeding system; the discharge end of the sintering proportioning bin is connected with the feed end of the primary mixer; the discharge end of the first-stage mixer is connected with the feed end of the second-stage mixer; and the discharge end of the secondary mixer is connected with a distributing device of the sintering machine.
Further, the screening device comprises a screening cylinder and a screen obliquely arranged in the screening cylinder; the inclined lower end of the screen is provided with a third discharge hole communicated with the feeding channel; and a first discharge hole used for being connected with a fuel feeding system and a second discharge hole used for corresponding to a receiving hopper of a feeding automobile are formed in the bottom of the screening cylinder.
Still further, the mesh aperture of the screen is 2.5 mm.
Further, the screening device comprises a screening cylinder, a first screen and a second screen, wherein the first screen and the second screen are obliquely arranged in the screening cylinder; the inclined lower end of the first screen is provided with a third discharge hole communicated with the feeding channel; a second discharge hole corresponding to a receiving hopper of a feeding automobile is formed in the inclined lower end of the second screen; a first discharge hole used for being connected with a fuel feeding system is formed in the bottom of the screening cylinder; and a material distribution flashboard is arranged in the feeding channel.
Still further, the mesh aperture of the first screen is 2.5 mm; the aperture of the mesh of the second screen is not more than 1 mm.
Still further, flowmeter and branch material flashboard are all installed to screening plant's first discharge gate, second discharge gate and third discharge gate department.
The utility model discloses a broken processing of sintering fuel and join in marriage with technology, technology includes following step:
firstly, collecting fuel dedusting ash, and conveying the fuel dedusting ash at a discharge port of a fuel bin to an ash collecting bin beside a secondary mixer by using a pneumatic ash conveying pipeline to serve as fuel for secondary adding for later use;
secondly, screening and crushing the coke powder fuel,
1) conveying the coke powder fuel output by the fuel bin to a four-roller crusher by a belt conveyor;
2) screening the coke powder fuel by a screening device arranged above the feeding end of the four-roller crusher;
3) sending the coarse-grain coke powder left on the screen of the screening device into a four-roller crusher for crushing operation;
4) pre-screening the coke powder fuel which is sieved by a screening device to obtain fine-particle coke powder with the particle size not larger than 3mm, directly feeding a part of the fine-particle coke powder into a sintering proportioning bin through a fuel feeding system with a weighing and metering device, and avoiding crushing; the other part of fine particle coke powder is transported to a secondary mixer by a feeding vehicle and is used as fuel for secondary addition and standby application;
thirdly, the fuel is added in a closed circuit,
1) conveying the pulverized coke fuel crushed by the four-roller crusher to a sintering proportioning bin through a fuel feeding system with a weighing and metering device;
2) blending the pulverized coke fuel crushed by the four-roller crusher with the fine-particle pulverized coke obtained in the second step;
3) the ingredients are sequentially fed into a first-stage mixer and a second-stage mixer for mixing and pelletizing;
4) adding fine granular coke powder in a feeding vehicle beside the secondary mixer into the secondary mixer;
5) conveying the fuel dedusting ash in the ash collection bin to a secondary mixer so that the fuel dedusting ash can uniformly cover the surface of the spherical mixture;
and fourthly, distributing and sintering on the machine, and distributing and sintering normally according to the prior art.
In a preferred embodiment, in the fuel screening and crushing process of the second step, the screening flow is controlled within 15t/h through the material distribution gate plate, and the screen is cleaned 1 time every half hour.
In a preferred embodiment, the fine coke powder delivered to the secondary mixer by the delivery vehicle during the fuel screening and crushing of the second stage accounts for 25% of the total coke powder.
In a preferred embodiment, in the fuel closed-loop feeding process of the third step, the fly ash of the fuel conveyed to the secondary mixer accounts for 12.5 percent of the total amount of the ingredients.
Compared with the prior art, the utility model discloses a broken processing of sintering fuel and joining in marriage with the production line, through set up the pre-screening plant of fuel at four-roller crusher feed end to propose the method that sintering fuel divides to add at sintering proportioning bins, compounding system, can effectively solve the sintering because of the adapted dry coke powder, the broken quality of sintering fuel that leads to is poor, problem that sintering process fuel utilization effect is poor.
Drawings
Fig. 1 is a schematic view of a production line of embodiment 1 of the present invention.
Figure 2 is a schematic diagram of a screening device of embodiment 2 of the present invention.
Fig. 3 is a schematic view of the process of the present invention.
The components in the drawings are labeled as: 1-bunker, 2-sintering machine, 3-four-roller crusher, 4-sintering batching bunker, 5-primary mixer, 6-secondary mixer, 7-sieving device, 71-sieving cylinder, 72-sieve, 721-first sieve, 722-second sieve, 73-third discharge hole, 74-first discharge hole, 75-second discharge hole, 8-dust-collecting hood, 9-pneumatic conveying pipeline, 10-dust-collecting bunker, 11-feeding car, 12-feeding channel, 13-distributor of sintering machine, 14-flowmeter and 15-material-distributing flashboard.
Detailed Description
Example 1:
the sintering fuel crushing processing and adding production line shown in figure 1 comprises a fuel bin 1 and a sintering machine 2; a four-roller crusher 3, a batching and mixing system and a fuel feeding system are sequentially arranged between the fuel bin 1 and the sintering machine 2 according to production procedures; the batching and mixing system consists of a sintering batching bin 4, a primary mixer 5 and a secondary mixer 6 which are connected in sequence; the bunker 1 is connected with a four-roller crusher 3 through a feeding mechanism, wherein the feeding mechanism can be a lifter used for conveying granular materials in the prior art and the like; a screening device 7 is arranged above the feed end of the four-roller crusher 3; the dust hood 8 is respectively arranged on the periphery of the feed port of the screening device 7 and the discharge port of the fuel bin 1, the dust hood on the periphery of the screening device can be connected with the feed port of the screening device by a flange, and the dust hood on the periphery of the discharge port of the fuel bin is connected with the discharge port of the fuel bin by a flange; the dust hood 8 is connected to the dust collecting bin 10 through the pneumatic conveying pipeline 9, the fuel dedusting ash is conveyed to the dust collecting bin beside the secondary mixer through the pneumatic conveying pipeline and used as a fuel secondary component for standby, the fuel dedusting ash can be redistributed for use, on one hand, the flying dust pollution phenomenon is avoided, on the other hand, the fuel dedusting ash is not mixed with coke powder after falling to the ground, the integral crushing processing efficiency of the fuel can be improved, and the fuel processing quality is improved; a feeding automobile 11 is parked below the first discharge end of the screening device 7; the second discharge end of the screening device 7 is connected with the sintering proportioning bin 4 through a fuel feeding system, wherein the fuel feeding system can be a screw feeder, a weighing belt or a lifter and the like which are provided with a weighing and metering device and used for conveying powder in the prior art; the third discharge end of the screening device 7 is connected with the four-roller crusher 3 through a feed channel 12; the discharge end of the four-roller crusher 3 is connected with a sintering proportioning bin 4 through a fuel feeding system; the discharge end of the sintering proportioning bin 4 is connected with the feed end of the primary mixer 5; the discharge end of the primary mixer 5 is connected with the feed end of the secondary mixer 6; and the discharge end of the secondary mixer 6 is connected with a distributing device 13 of the sintering machine.
The screening device 7 comprises a screening cylinder 71 and a screen 72 obliquely arranged in the screening cylinder 71; the inclined lower end of the screen 72 is provided with a third discharge hole 73 for communicating with the feed channel 12; the bottom of the screening drum 71 is provided with a first discharge hole 74 used for being connected with a fuel feeding system and a second discharge hole 75 used for corresponding to a receiving hopper of the feeding automobile 11.
The mesh opening of the screen 71 is 2.5 mm.
The first discharge port 74, the second discharge port 75 and the third discharge port 73 of the screening device 7 are respectively provided with a flowmeter 14 and a material distribution gate plate 15, wherein the material distribution gate plate can be an electric material blocking valve in the prior art, and the like.
Example 2:
the sintered fuel crushing processing and feeding line shown in fig. 2 has a structure substantially the same as that of example 1, wherein the screening device 7 includes a screening drum 71, and a first screen 721 and a second screen 722 obliquely installed in the screening drum 71; the inclined lower end of the first screen 721 is provided with a third discharge hole 73 for communicating with the feed channel 12; the inclined lower end of the second screen 722 is provided with a second discharge hole 75 corresponding to the receiving hopper of the feeding automobile 11; the bottom of the screening cylinder 71 is provided with a first discharge hole 74 used for being connected with a fuel feeding system; and a material distribution flashboard is arranged in the feeding channel. The mesh aperture of the first screen 721 is 2.5 mm; the aperture of the mesh of the second screen 722 is not more than 1mm, so that the particle size of the fine-particle coke powder conveyed to the sintering proportioning bin is more than 1mm and less than 3 mm; the fine granular coke powder delivered to the secondary mixer has a particle size of less than 1 mm.
The sintering fuel crushing processing and adding process shown in fig. 3 comprises the following steps:
firstly, collecting fuel dedusting ash, and conveying the fuel dedusting ash at a discharge port of a fuel bin to an ash collecting bin beside a secondary mixer by using a pneumatic ash conveying pipeline to serve as fuel for secondary adding for later use;
secondly, screening and crushing the coke powder fuel,
1) conveying the coke powder fuel output by the fuel bin to a four-roller crusher by a belt conveyor;
2) screening the coke powder fuel by a screening device arranged above the feeding end of the four-roller crusher;
3) sending the coarse-grain coke powder left on the screen of the screening device into a four-roller crusher for crushing operation;
4) pre-screening the coke powder fuel which is sieved by a screening device to obtain fine-particle coke powder with the particle size not larger than 3mm, directly feeding a part of the fine-particle coke powder into a sintering proportioning bin through a fuel feeding system with a weighing and metering device, and avoiding crushing; the other part of fine particle coke powder is transported to a secondary mixer by a feeding vehicle and is used as fuel for secondary addition and standby application;
thirdly, the fuel is added in a closed circuit,
1) conveying the pulverized coke fuel crushed by the four-roller crusher to a sintering proportioning bin through a fuel feeding system with a weighing and metering device;
2) blending the pulverized coke fuel crushed by the four-roller crusher with the fine-particle pulverized coke obtained in the second step;
3) the ingredients are sequentially fed into a first-stage mixer and a second-stage mixer for mixing and pelletizing;
4) adding fine granular coke powder in a feeding vehicle beside the secondary mixer into the secondary mixer;
5) conveying the fuel dedusting ash in the ash collection bin to a secondary mixer so that the fuel dedusting ash can uniformly cover the surface of the spherical mixture;
and fourthly, distributing and sintering on the machine, and distributing and sintering normally according to the prior art.
In the fuel screening and crushing process of the second step, the screening flow is controlled within 15t/h through the material distribution gate plate, and the screen is cleaned for 1 time every half hour.
In the fuel screening and crushing process of the second step, the fine granular coke powder conveyed to the secondary mixer by the feeding vehicle accounts for 25 percent of the total amount of the coke powder.
In the fuel closed-circuit adding process in the third step, the fuel fly ash conveyed to the secondary mixer accounts for 12.5 percent of the total amount of the ingredients.
The utility model discloses a broken processing of sintering fuel and joining in marriage and add production line through the screening plant in advance that sets up fuel at four-roller crusher feed end to propose sintering fuel and divide the method that adds at sintering proportioning bins, compounding system, realized that the fine coke utilizes at the inside step of sintering, can effectively solve the sintering because of the dry fine coke of adapted, the broken quality of sintering fuel that leads to is poor, problem that sintering process fuel utilization effect is poor.
The utility model discloses a sintering fuel crushing processing and adding production line, through designing by oneself, using fuel pre-screening equipment, improved the screening efficiency of fuel, improved the subsequent fuel processingquality; the coke powder with the granularity less than 3mm is added into the secondary mixer, so that the overall utilization effect of the sintering fuel can be improved, and the consumption of the sintering fuel is reduced; in particular, the amount of the solvent to be used,
1) pre-screening the fuel before crushing, and installing a screening system above the feed end of a four-roller crusher, wherein the size of a screen is 2 meters long and 1.5 meters wide, and the aperture of the screen is designed and controlled according to 2.5 mm; the pre-screening system does not intentionally improve the screening efficiency, and takes the principle of ensuring the screening quality as a principle, the treatment flow of the screen plate is controlled within 15t/h through the material distribution flashboard, and the screen is cleaned for 1 time every half an hour; the oversize is coarse particle coke powder which enters a four-roller crusher for processing; the granularity of the coke powder sieved by the pre-sieving is basically below 3mm, and one part of the coke powder can directly enter a sintering proportioning bin through a fuel feeding system and is not crushed; the other part can be transported to a second mixing machine by an automobile and used as fuel for secondary adding and standby;
2) the fuel dedusting ash is redistributed for use, and the fuel dedusting ash is seriously blown off due to fine particle size unloading, and the fuel dedusting ash is conveyed to an ash collecting bin beside a secondary mixer through a designed pneumatic conveying pipeline to be used as fuel secondary addition for standby; by redistribution of the fuel dust, the phenomenon of dust pollution is avoided on one hand, and on the other hand, the fuel dust is not mixed with coke powder after falling to the ground, so that the overall crushing processing efficiency of the fuel can be improved, and the processing quality of the fuel is improved;
3) the fuel is added in a closed circuit, and the dust removal ash of the fuel is totally and externally added into a secondary mixer because of less production, the proportion is 0.5 percent, and the adding proportion is 12.5 percent; the coke powder is mainly added between ingredients, the adding proportion of the ingredients in the two-mixer is gradually increased, and the effects of improving the quality of the sinter and reducing the fuel consumption are optimal by optimizing the sintering process parameters and controlling the external adding proportion of the coke powder to be 25%.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.
Claims (6)
1. A sintering fuel crushing processing and adding production line comprises a fuel bin and a sintering machine; a four-roller crusher, a batching and mixing system and a fuel feeding system are sequentially arranged between the fuel bin and the sintering machine according to the production process; the batching and mixing system consists of a sintering batching bin, a primary mixer and a secondary mixer which are connected in sequence; the fuel bin is connected with the four-roller crusher through the feeding mechanism; the method is characterized in that: a screening device is arranged above the feed end of the four-roller crusher; dust collecting hoods are respectively arranged on the periphery of a feed inlet of the screening device and the periphery of a discharge outlet of the fuel bin; the dust collection cover is connected to the dust collection bin through a pneumatic conveying pipeline; a feeding automobile is parked below the first discharge end of the screening device; the second discharge end of the screening device is connected with the sintering proportioning bin through a fuel feeding system; the third discharge end of the screening device is connected with a four-roller crusher through a feed channel; the discharge end of the four-roller crusher is connected with the sintering proportioning bin through a fuel feeding system; the discharge end of the sintering proportioning bin is connected with the feed end of the primary mixer; the discharge end of the first-stage mixer is connected with the feed end of the second-stage mixer; and the discharge end of the secondary mixer is connected with a distributing device of the sintering machine.
2. The sintering fuel crushing processing and adding production line according to claim 1, characterized in that: the screening device comprises a screening cylinder and a screen obliquely arranged in the screening cylinder; the inclined lower end of the screen is provided with a third discharge hole communicated with the feeding channel; and a first discharge hole used for being connected with a fuel feeding system and a second discharge hole used for corresponding to a receiving hopper of a feeding automobile are formed in the bottom of the screening cylinder.
3. The sintering fuel crushing processing and adding production line according to claim 2, characterized in that: the mesh aperture of the screen is 2.5 mm.
4. The sintering fuel crushing processing and adding production line according to claim 1, characterized in that: the screening device comprises a screening cylinder, a first screen and a second screen, wherein the first screen and the second screen are obliquely arranged in the screening cylinder; the inclined lower end of the first screen is provided with a third discharge hole communicated with the feeding channel; a second discharge hole corresponding to a receiving hopper of a feeding automobile is formed in the inclined lower end of the second screen; a first discharge hole used for being connected with a fuel feeding system is formed in the bottom of the screening cylinder; and a material distribution flashboard is arranged in the feeding channel.
5. The sintering fuel crushing processing and adding production line of claim 4, characterized in that: the aperture of the mesh of the first screen is 2.5 mm; the aperture of the mesh of the second screen is not more than 1 mm.
6. The sintering fuel crushing processing and adding production line according to any one of claims 1, 2 and 4, characterized in that: the first discharge port, the second discharge port and the third discharge port of the screening device are provided with a flowmeter and a material distributing flashboard.
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| CN202021246516.1U CN213493910U (en) | 2020-07-01 | 2020-07-01 | Sintering fuel crushing processing and adding production line |
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| CN202021246516.1U CN213493910U (en) | 2020-07-01 | 2020-07-01 | Sintering fuel crushing processing and adding production line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699369A (en) * | 2021-08-24 | 2021-11-26 | 德龙钢铁有限公司 | Sintered material preparation equipment and method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699369A (en) * | 2021-08-24 | 2021-11-26 | 德龙钢铁有限公司 | Sintered material preparation equipment and method |
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Assignee: XINJIANG KUNYU STEEL Co.,Ltd. Assignor: SHIHENG SPECIAL STEEL GROUP Co.,Ltd. Contract record no.: X2022980027124 Denomination of utility model: A kind of sintering fuel crushing processing and blending production line Granted publication date: 20210622 License type: Common License Record date: 20230105 |