CN103643038B - Paving method for sintering machine's bilayer bedding materials - Google Patents
Paving method for sintering machine's bilayer bedding materials Download PDFInfo
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Abstract
The invention discloses a method for paving bedding materials on a sintering machine before paving a mixed material into the sintering machine. The method includes the steps of: (1) paving a first layer of large bedding material on sintering machine trolley grate bars, with the large bedding material being sintered ore with a particle size of 8-12mm and thickness of 10-20mm; and (2) paving a second layer of small bedding material on the first layer of large bedding material, with the small bedding material being sintered ore with a particle size of 3-8mm and thickness of 10-15mm. The paving method for sintering machine's bilayer bedding materials provided by the invention can reduce consumption of large particle grade sintered ore without changing grate bar interval, improving the output of sintered ore and enhancing the utilization rate of blast furnace ditch return mine.
Description
Technical field
The invention belongs to iron ore sintering technical field, specifically, large grade agglomerate materials can be reduced under the invention provides a kind of prerequisite not changing grid section gap, improving Sintering Yield and the sinter machine double bunk bed material method of utilization ratio of returning mine under improving blast furnace ditch.
Background technology
For protection sintering pallet and ensure that the bed of material is grilled thoroughly, large-type sinterer all at the thick agglomerate of sintering pallet upper berth 20 ~ 40mm as grate-layer material, grate-layer material is covered with compound and carries out igniting and sinter.Conflicting interactional relation is there is between sintering machine bogie grates gap, grate-layer material granularity, bed permeability three.Whether sinter machine adopts grate-layer material technique, and its grid section gap design is different.Without the sinter machine of grate-layer material technique, grid section gap is less, is generally 2 ~ 3mm, and object prevents compound exhausting system of bleeding from gap from damaging smoke extractor rotor, but grid section gap too small after, exhausting resistance strengthens, and bed permeability is deteriorated; Adopt the sinter machine of grate-layer material technique; grid section gap is generally 6 ~ 8mm; gap wide like this; general compound all can bleed large flue; so must first layer overlay grate-layer material on grid section, repave compound, this addresses the problem the contradiction that grid section leaks material and ventilation property; grate-layer material can also protect grid section and smoke extractor, reduces exhaust gas dust.After but grate-layer material granularity is excessive, the minimizing of high-quality grade in finished product ore deposit must be caused, reduce the weight in blast furnace sinter ore deposit.
Be in the patent documentation " the whole grain technique of agglomerate less breakage granule smaller grain and narrower deflection gap bed material " of CN1635167A at publication number, grate-layer material size range is reduced into 6 ~ 8mm, although this method completely eliminates the defect of the High-quality Sinters of 10 ~ 20mm as grate-layer material, but do not mention grid section gap in document, and according to process requirements, only having grid section gap to be less than 6mm just can avoid grid section to leak material, and carries out renewal grid section according to process requirements and transform screening system improving process costs.
In prior art, the sintering machine bogie grates gap with grate-layer material technique is generally 6 ~ 8mm, increase grid section gap and can improve bed permeability, but also increase the granularity of grate-layer material simultaneously, reduce the service efficiency in sintering high-quality finished product ore deposit and improve industrial production cost.Therefore, under the condition not affecting bed permeability, reduce the granularity that grid section gap can reduce grate-layer material, thus enhance productivity and reduce production cost.The present invention selects grid section gap to be 6mm, under the prerequisite ensureing bed permeability, can effectively reduce the use of volume particle size agglomerate in grate-layer material.
Grate-layer material act as reduction resistance, improves bed thickness, reduces over the impact of wet layer, Chalk-dust filtering, protection chassis, protection smoke extractor.Grate-layer material is finished product agglomerate, uses grate-layer material can reduce the utilization ratio in sintering high-quality finished product ore deposit, therefore under the prerequisite ensureing grate-layer material effect, should reduce grate-layer material consumption as far as possible.Generally control at about 6% of sinter machine Sintering Yield by weight percentage by grate-layer material consumption in prior art, granularity is at 10 ~ 20mm, and thickness is at 30 ~ 40mm.The double bunk bed material method that the present invention adopts, under the prerequisite not changing bogie grates gap, large grate-layer material is controlled by weight percentage at 3 ~ 4% of sinter machine Sintering Yield, two-layer grate-layer material total thickness controls about 30: the first layer uses granularity to be 8 ~ 12mm, thickness is the large grate-layer material of 10 ~ 20mm, can reduce volume particle size agglomerate consumption like this, improve bed permeability; The second layer uses granularity to be 3 ~ 8mm, thickness is the little grate-layer material of 10 ~ 15mm, like this can while guarantee bed permeability, reduce little grate-layer material and compound leaks the infringement expecting to cause smoke extractor and chassis, improve the thickness of the bed of material and utilization ratio of returning mine under improving blast furnace ditch, reduce over the impact that wet layer causes sintering process.
Three screenings are arranged to large grate-layer material screening system.The once cold ore deposit vibratory screening apparatus 1 of sieve compartment is sent to from cooler agglomerate out, screen sizing point is 8mm, the product introduction secondary cold ore deposit vibratory screening apparatus 2 of oversize level, screen sizing point is 12mm, the product of undersize level is sent to agglomerating chamber as large grate-layer material, when grate-layer material is superfluous, superfluous grate-layer material is sent to blast furnace together with the product of secondary cold ore deposit vibratory screening apparatus 2 oversize level as sintering finished.The agglomerate of 0 ~ 8mm grade of sifting out from once cold ore deposit vibratory screening apparatus 1 enters three cold ore deposit vibratory screening apparatuss 3 of sieve compartment, and screen sizing point is 5mm, and the product of oversize level is sent to blast furnace, and the product of undersize level transports dosing vessel to and participates in batching as returning mine.By arranging three screenings, effectively can reduce the agglomerate doses being more than or equal to 12mm grade, improve the service efficiency of large grade agglomerate in blast-furnace smelting, decrease the little grade agglomerate being less than 5mm simultaneously and be mixed in large grate-layer material the impact that sintering process and agglomerating plant cause.
For little grate-layer material screening system, through detecting for a long time, the size composition of returning mine under blast furnace ditch is generally and is less than or equal to 8mm, therefore for improving screening efficiency and simple flow, only arranging and once sieving, dividing and get 3 ~ 8mm grade as little grate-layer material.Return mine under blast furnace ditch return in sintering circuit way, blast furnace ditch is set under return mine and reclaim vibratory screening apparatus 4, screen sizing point is 3mm, and the product of oversize level transports agglomerating chamber to as little grate-layer material, and the product of undersize level returns sintering process and uses.
After little grate-layer material screening, little grate-layer material ore deposit groove 5 can be set directly over little grate-layer material screening system other, little grate-layer material travelling belt P2, little grate-layer material after screening is deposited, by the dispensing valve controlling to be arranged at groove 5 bottom, little grate-layer material ore deposit, feeding is carried out to grate-layer material little in groove, then by little grate-layer material travelling belt P2, the little grate-layer material in little grate-layer material ore deposit groove 5 is transported on large grate-layer material travelling belt P1.
Haulage system is made up of large grate-layer material travelling belt P1 and little grate-layer material travelling belt P2, and haulage time is interval transport.
Large grate-layer material travelling belt P1 is made up of many conveyors, transporting direction is that large grate-layer material screening system is to feed bin direction, sieve out qualified large grate-layer material by large grate-layer material screening system and be transported to large grate-layer material feed bin 8 via large grate-layer material travelling belt P1 and blanking device 6, when large grate-layer material feed bin 8 is bought securities with all one's capital, the conveyor closing on secondary cold ore deposit vibratory screening apparatus 2 in large grate-layer material travelling belt P1 shuts down, conveyor in all the other large grate-layer material travelling belt P1 is in idling conditions, the large grate-layer material of the surplus that secondary cold ore deposit vibratory screening apparatus 2 sieves out is directly sent to blast furnace as sintering finished.When large grate-layer material feed bin 8 drops to certain position in storehouse, secondary cold ore deposit vibratory screening apparatus 2, to large grate-layer material travelling belt P1 feed, closes on the conveyor entry into service of the stopping of secondary cold ore deposit vibratory screening apparatus 2, again transports large grate-layer material.
Little grate-layer material travelling belt P2 is made up of many conveyors, transporting direction is that little grate-layer material screening system is to large grate-layer material travelling belt P1 direction, to buy securities with all one's capital the neutral causing the conveyor closing on secondary cold ore deposit vibratory screening apparatus 2 to shut down at large grate-layer material feed bin 8, little grate-layer material travelling belt P2 entry into service.The qualified little grate-layer material be stored in little grate-layer material ore deposit groove 5 of being sieved out by little grate-layer material screening system, drop on little grate-layer material travelling belt P2 along the dispensing valve bottom little grate-layer material ore deposit groove 5, and be transported to by little grate-layer material travelling belt P2 and be on the conveyor of idling conditions in large grate-layer material travelling belt P1, by the conveyor of idle running, little grate-layer material is transported to little grate-layer material feed bin 9, when little grate-layer material feed bin 9 is bought securities with all one's capital, little grate-layer material travelling belt P2 is out of service.When little grate-layer material feed bin 9 drops to certain position in storehouse, little grate-layer material travelling belt P2 operates.According to embodiments of the invention, little grate-layer material travelling belt P2 transporting direction also can be the direction of little grate-layer material screening system to blanking device 6, little grate-layer material via large grate-layer material travelling belt P1, directly can not be transported to blanking device 6 by little grate-layer material travelling belt P2 by little grate-layer material.
Carry out transporting in the process of grate-layer material at switching grate-layer material travelling belt, can buildup be there is due to large grate-layer material travelling belt P1 or little grate-layer material travelling belt P2 in transportation thus the phenomenon of batch mixing amount occurs, but compared with grate-layer material total amount, this batch mixing amount can be ignored.Therefore can without the need to considering the impact that the batch mixing caused due to travelling belt buildup produces technology and equipment when switching grate-layer material travelling belt.
Blanking device 6 is three-port structure, is made up of an opening for feed and two discharge ports, and throat-fed is passed through in the grate-layer material that large grate-layer material travelling belt P1 transports; Two discharge ports are respectively large grate-layer material discharge port and little grate-layer material discharge port, the corresponding large grate-layer material feed bin 8 of large grate-layer material discharge port, the corresponding little grate-layer material feed bin 9 of little grate-layer material discharge port, an electric rotating plate 7 is set between two discharge ports, electric rotating plate 7 and little grate-layer material transports skin P2 and are with and carry out chain control, and when little grate-layer material travelling belt P2 running, electric rotating plate 7 covers large grate-layer material discharge port, the conducting of little grate-layer material discharge port, little grate-layer material feed bin 9 can pan feeding; When little grate-layer material travelling belt P2 shuts down, electric rotating plate 7 covers little grate-layer material discharge port, the conducting of large grate-layer material discharge port, and large grate-layer material feed bin 8 can pan feeding.Above process moves in circles, and belt-conveying start all can operate on computers with shutdown and electric rotating plate 7.According to embodiments of the invention, blanking device 6 and electric rotating plate 7 can not be set, directly the large grate-layer material of transport on large grate-layer material travelling belt P1 is transported in large grate-layer material feed bin 8, the little grate-layer material of transport on little grate-layer material travelling belt P2 is transported in little grate-layer material feed bin 9.
Feed bin, be divided into large grate-layer material feed bin 8 and little grate-layer material feed bin 9, near being arranged in sintering device handpiece before and after sinter machine traffic direction, a little grate-layer material of feed bin splendid attire above, a large grate-layer material of feed bin splendid attire next, under this is arranged in the prerequisite not reducing grid section gap, can effectively prevent little grate-layer material from leaking material, reduce the use doses of large grate-layer material, the utilization ratio that under also improving blast furnace ditch, little grade is returned mine simultaneously.Bin bottom installs blanking valve separately.According to the embodiment of the present invention, for reducing production cost, large grate-layer material feed bin 8 and little grate-layer material feed bin 9 can be reconstructed, under the condition of prior art, by adding a dividing plate in raw material cabin, and open dispensing valve in bottom, space, dividing plate both sides, and can under the prerequisite of not feed change chamber structure, realize the function of large grate-layer material feed bin 8 and little grate-layer material feed bin 9 in the embodiment of the present invention.
Summary of the invention
The object of the invention is to overcome above-mentioned technical deficiency, large grade agglomerate materials under a kind of prerequisite not changing grid section gap is provided, can be reduced, improve Sintering Yield and the sinter machine double bunk bed material method of utilization ratio of returning mine under improving blast furnace ditch.
According to sinter machine double bunk bed material method of the present invention, before sinter machine spreads compound, on sinter machine upper berth, grate-layer material comprises the following steps: (1), in the large grate-layer material of sintering machine bogie grates upper berth the first layer, this large grate-layer material is granularity is 8 ~ 12mm, thickness is the agglomerate of 10 ~ 20mm; (2) in the little grate-layer material of the first layer large grate-layer material upper berth second layer, this little grate-layer material is granularity is 3 ~ 8mm, thickness is the agglomerate of 10 ~ 15mm.
According to exemplary embodiment of the present invention, sintering machine bogie grates gap can be 6mm.
According to exemplary embodiment of the present invention, the large grate-layer material of the first layer in step (1) can sieve gained by agglomerate finished product, the little grate-layer material of the second layer in step (2) can by screening gained of returning mine under blast furnace ditch, and two-layer grate-layer material total thickness can be 30 ± 5mm.
According to exemplary embodiment of the present invention, the once cold ore deposit vibratory screening apparatus of agglomerating chamber can be sent to from cold ore deposit machine agglomerate out, one time screen sizing point is 8mm, oversize level product can enter secondary cold ore deposit vibratory screening apparatus, regrading level point is 12mm, and screen undersize can be sent to agglomerating chamber as large grate-layer material.
According to exemplary embodiment of the present invention, BF return fines return in agglomerating chamber way, blast furnace ditch can be set under to return mine recovery vibratory screening apparatus, screen sizing point is 3mm, and sieve upper part can be stored in the groove of ore deposit as little grate-layer material.
According to exemplary embodiment of the present invention, the little grate-layer material of the second layer can account for 20 ~ 50% of total grate-layer material by weight percentage.
According to exemplary embodiment of the present invention, large grate-layer material can be transported to agglomerating chamber by large grate-layer material travelling belt, at large grate-layer material travelling belt idle period, little grate-layer material in the groove of ore deposit can be transported on large grate-layer material travelling belt by little grate-layer material travelling belt, little grate-layer material can be transported to agglomerating chamber by large grate-layer material travelling belt.
According to exemplary embodiment of the present invention, two feed bins arranged side by side before and after can arranging along chassis traffic direction above chassis in agglomerating chamber, be positioned at feed bin above and can transport the little grate-layer material of coming by splendid attire little grate-layer material travelling belt, be positioned at feed bin below and can transport the large grate-layer material of coming by splendid attire large grate-layer material travelling belt, a blanking device is set above two feed bins, controls large grate-layer material and little grate-layer material to respective bin blanking by the electric rotating plate be arranged in blanking device.
Chain control is carried out according between exemplary embodiment of the present invention, little grate-layer material travelling belt and the electric rotating plate being arranged at above two feed bins.
The sintering process that sinter machine double bunk bed material method according to the present invention is carried out, can significantly reduce large grade agglomerate doses under the prerequisite not changing grid section gap, improves the Sintering Yield of sinter machine and utilization ratio of returning mine under improving blast furnace ditch.
Accompanying drawing explanation
The following description of the exemplary embodiment of carrying out in conjunction with the drawings, advantage of the present invention will become clear and be easier to understand, wherein:
Fig. 1 is double bunk bed material process flow sheet.
Wherein:
1. once cold ore deposit vibratory screening apparatus;
2. two cold ore deposit vibratory screening apparatuss;
3. three cold ore deposit vibratory screening apparatuss;
4. to return mine under blast furnace ditch recovery vibratory screening apparatus;
5. little grate-layer material ore deposit groove;
6. blanking device;
7. electric rotating plate;
8. large grate-layer material feed bin;
9. little grate-layer material feed bin;
P1. large grate-layer material travelling belt;
P2. little grate-layer material travelling belt.
Embodiment
Below in conjunction with exemplary embodiment, sinter machine grate-layer material method of the present invention and equipment thereof are described further.
Embodiment 1
Double bunk bed material method is adopted to produce agglomerate.
The once cold ore deposit vibratory screening apparatus 1 of sieve compartment is sent to from blowing circular colling machine agglomerate out, carry out first time screening, once the screen sizing point of cold ore deposit vibratory screening apparatus 1 is 8mm, the product introduction secondary cold ore deposit vibratory screening apparatus 2 of oversize level, carry out regrading, three cold ore deposit vibratory screening apparatuss 3 of the product introduction sieve compartment of undersize level, carry out three screenings; In regrading, secondary cold ore deposit vibratory screening apparatus 2 screen sizing point is 12mm, the product of undersize level is sent to large grate-layer material feed bin 8 as large grate-layer material by large grate-layer material travelling belt P1, and when large grate-layer material is superfluous, the product of unnecessary large grate-layer material and oversize level is delivered to blast furnace as raw materials for metallurgy; In three screenings, three times cold ore deposit vibratory screening apparatus 3 screen sizing point is 5mm, and the product of oversize level delivers to blast furnace as raw materials for metallurgy, and the product of undersize level transports dosing vessel to and participates in batching as returning mine.
In grate-layer material blanking device 6, electric rotating plate 7 is chain with little grate-layer material travelling belt P2, when large grate-layer material travelling belt P1 transports large grate-layer material, little grate-layer material travelling belt is in halted state, in blanking device 6, electronic reprint 7 covers the discharge port towards little grate-layer material feed bin 9, towards the discharge port conducting of large grate-layer material feed bin 8, large grate-layer material travelling belt P1 directly by the large grate-layer material discharge port of the feeding mouth in blanking device 6 and conducting, by large grate-layer material blanking to large grate-layer material feed bin 8.When large grate-layer material feed bin 8 is filled, the conveyor closing on vibratory screening apparatus 2 place, secondary cold ore deposit in computer control large grate-layer material travelling belt P1 stops feed, now in large grate-layer material travelling belt P1, rest part is in idling conditions, and the large grate-layer material of the surplus that secondary cold ore deposit vibratory screening apparatus 2 sieves out is sent to blast furnace together with the product of secondary cold ore deposit vibratory screening apparatus 2 oversize level as sintering finished.
When large grate-layer material feed bin 8 storehouse is full, the conveyor closing on secondary cold ore deposit vibratory screening apparatus 2 in large grate-layer material travelling belt P1 shuts down, in large grate-layer material travelling belt P1, all the other conveyors are in idling conditions, and operator open little grate-layer material travelling belt P2 by computer, start to transport little grate-layer material.
Little grate-layer material obtains by after screening of returning mine under blast furnace ditch.Return mine under blast furnace ditch in the way returning sintering circuit, return mine under correct position arranges a blast furnace ditch according to practical situation and reclaim vibratory screening apparatus 4, returning mine under blast furnace ditch and reclaiming vibratory screening apparatus 4 screen sizing point is 3mm, the product of undersize level returns sintering and uses, the product of oversize level collects storage with little grate-layer material ore deposit groove 5, little grate-layer material travelling belt P2 is set again, by the baiting valve of little grate-layer material ore deposit trench bottom, little grate-layer material is transferred on little grate-layer material travelling belt P2, little grate-layer material travelling belt P2 brings into operation, and little grate-layer material is transported to and is on the conveyor of idling conditions in large grate-layer material travelling belt P1, by the conveyor of idle running, little grate-layer material travelling belt P2 is transported the little grate-layer material of coming and be transported to blanking device 6.Now because little grate-layer material travelling belt P2 runs, the electric rotating plate 7 chain with little grate-layer material travelling belt P2 covers the discharge port towards large grate-layer material feed bin 8, towards the discharge port conducting of little grate-layer material feed bin 9, little grate-layer material travelling belt P2 directly by the little grate-layer material discharge port of the feeding mouth in blanking device 6 and conducting, by little grate-layer material blanking to little grate-layer material feed bin 9.
When little grate-layer material feed bin storehouse is full, operator are out of service by computer control little grate-layer material travelling belt P2.Above transportation hockets, and decides the operation conditions of haulage system by large grate-layer material feed bin 8 and the position in storehouse of little grate-layer material feed bin 9.
When feed bin position in storehouse rises to certain altitude, just grate-layer material operation can be carried out.In sinter machine operation process, empty station car by loop to working face time, open and regulate large grate-layer material feed bin 8 blanking valve, large grate-layer material is laid on chassis, thickness is 10 ~ 20mm, when the chassis that large grate-layer material is completed runs to little grate-layer material feed bin 9 blanking valve, open and regulate little grate-layer material bin blanking valve, in the large grate-layer material that little grate-layer material is evenly laid on chassis, thickness is 10 ~ 15mm, as which form double bunk bed material, then starts mixture distributor, through igniting, sintering, cooling, obtain agglomerate.
To be prior art and the embodiment of the present invention contrast about the size composition of grate-layer material agglomerate table 1.In the size composition of prior art, the grate-layer material of 16 ~ 25mm grade accounts for 34.47% of total grate-layer material by weight percentage, and in the grate-layer material granularity formation of the embodiment of the present invention, the grate-layer material of 16 ~ 25mm grade accounts for 9.63% of total grate-layer material by weight percentage, 24.84% is decreased than prior art, this part large grade agglomerate reduced enters blast-furnace smelting, obviously improve agglomerate utilization ratio, and the impact that in prior art and the embodiment of the present invention, grate-layer material produces sintering process and equipment thereof is suitable, therefore, the embodiment of the present invention can significantly improve agglomerate utilization ratio under the prerequisite not affecting sintering process and equipment thereof.
Granularity contrast before and after table 2 reclaims for returning mine under blast furnace ditch, table 3 is little grate-layer material size composition.As shown in Table 2, the embodiment of the present invention has reclaimed is 7.40% by weight percentage, granularity is returned mine as little grate-layer material under being greater than the blast furnace ditch of 5mm; As shown in Table 3 in little grate-layer material granularity be less than 3mm only account for 8.69% by weight percentage, meet process requirements completely as second layer grate-layer material, also less on the impact of equipment.Therefore, returning mine under reclaiming blast furnace ditch, decreasing returns mine returns the heavy fresh processed expense of sintering process, improve the utility value of returning mine, reduce the use doses of large grade agglomerate in grate-layer material, adding blast furnace High-quality Sinters to the supply of blast furnace improves the metallurgical effect of blast furnace, and then the optimization function of grate-layer material to sintering process has been given full play under the condition not affecting sintering process and agglomerating plant, economic benefit is obvious.
Table 1 prior art and the embodiment of the present invention contrast about the size composition of grate-layer material agglomerate
| Grate-layer material size composition | 16～25mm% | 10～16mm% | 5～10mm% | <5mm% |
| Prior art | 34.47 | 52.22 | 10.5 | 2.81 |
| The embodiment of the present invention | 9.63 | 55.45 | 27.76 | 7.16 |
Granularity before and after reclaiming of returning mine under table 2 blast furnace ditch contrasts
| To return mine under blast furnace ditch recovery | Before recovery | After recovery |
| Granularity > 5mm% | 19.07 | 11.66 |
The little grate-layer material size composition of table 3
| Grade | >5mm% | 5～3mm% | <3mm% |
| Little grate-layer material size composition | 38.63 | 52.68 | 8.69 |
Claims (8)
1. a sinter machine double bunk bed material method, is characterized in that, grate-layer material on sinter machine upper berth before sinter machine spreads compound, said method comprising the steps of:
(1) in the large grate-layer material of sintering machine bogie grates upper berth the first layer, this large grate-layer material is granularity is 8 ~ 12mm, thickness is the agglomerate of 10 ~ 20mm;
(2) in the little grate-layer material of the first layer large grate-layer material upper berth second layer, this little grate-layer material is granularity is 3 ~ 8mm, thickness is the agglomerate of 10 ~ 15mm;
Wherein, sintering machine bogie grates gap is 6mm.
2. sinter machine double bunk bed material method as claimed in claim 1, it is characterized in that, the large grate-layer material of the first layer in step (1) sieves gained by agglomerate finished product, the little grate-layer material of the second layer in step (2) is by screening gained of returning mine under blast furnace ditch, and two-layer grate-layer material total thickness is 30 ± 5mm.
3. sinter machine double bunk bed material method as claimed in claim 2, it is characterized in that, the once cold ore deposit vibratory screening apparatus of agglomerating chamber is sent to from cold ore deposit machine agglomerate out, one time screen sizing point is 8mm, oversize level product introduction secondary cold ore deposit vibratory screening apparatus, regrading level point is 12mm, and screen undersize is sent to agglomerating chamber as large grate-layer material.
4. sinter machine double bunk bed material method as claimed in claim 2, is characterized in that, return mine under blast furnace ditch return in agglomerating chamber way, blast furnace ditch is set under to return mine recovery vibratory screening apparatus, screen sizing point is 3mm, and sieve upper part is stored in the groove of ore deposit as little grate-layer material.
5. sinter machine double bunk bed material method as claimed in claim 1, it is characterized in that, the little grate-layer material of the second layer accounts for 20 ~ 50% of total grate-layer material by weight percentage.
6. sinter machine double bunk bed material method as claimed in claim 1, it is characterized in that, large grate-layer material is transported to agglomerating chamber by large grate-layer material travelling belt, at large grate-layer material travelling belt idle period, little grate-layer material in the groove of ore deposit is transported on large grate-layer material travelling belt by little grate-layer material travelling belt, by large grate-layer material travelling belt, little grate-layer material is transported to agglomerating chamber.
7. sinter machine double bunk bed material method as claimed in claim 6, it is characterized in that, two feed bins arranged side by side before and after arranging along chassis traffic direction above chassis in agglomerating chamber, be positioned at the travelling belt of the little grate-layer material of feed bin splendid attire above and transport the little grate-layer material of coming, be positioned at the travelling belt of the large grate-layer material of feed bin splendid attire below and transport the large grate-layer material of coming, above two feed bins, blanking device is set, controls large grate-layer material and little grate-layer material to respective bin blanking by the electric rotating plate be arranged in blanking device.
8. sinter machine double bunk bed material method as claimed in claim 7, is characterized in that, carries out chain control between little grate-layer material travelling belt and the electric rotating plate being arranged at above two feed bins.
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| CN110749197A (en) * | 2019-09-26 | 2020-02-04 | 首钢京唐钢铁联合有限责任公司 | Sintering screening material distribution device and method |
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| CN102978313A (en) * | 2012-12-25 | 2013-03-20 | 中冶北方（大连）工程技术有限公司 | Sinter feeding system and method for improving burden distribution of blast furnace |
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| CN1635167A (en) * | 2003-12-29 | 2005-07-06 | 安阳钢铁股份有限公司 | Particle shaping process with less breakage, smaller grain and narrower deflection gap for hearth layer material in sinter |
| CN102978313A (en) * | 2012-12-25 | 2013-03-20 | 中冶北方（大连）工程技术有限公司 | Sinter feeding system and method for improving burden distribution of blast furnace |
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