CN204569999U - A kind of revert system of grate-kiln pelletizing production line - Google Patents
A kind of revert system of grate-kiln pelletizing production line Download PDFInfo
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- CN204569999U CN204569999U CN201520281137.9U CN201520281137U CN204569999U CN 204569999 U CN204569999 U CN 204569999U CN 201520281137 U CN201520281137 U CN 201520281137U CN 204569999 U CN204569999 U CN 204569999U
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- grate
- rotary kiln
- kiln
- returning charge
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Abstract
The revert system of a kind of grate-kiln pelletizing production line of the present utility model, belongs to grate kiln pelletizing technical field.The revert system of grate-kiln pelletizing production line of the present utility model, comprise drying grate, bucket machine, return conveyer conveyor, and the rotary kiln to connect with chain grate head, be provided with ash bin on the downside of described drying grate, this ash bin collects the returning charge produced from green-ball; Described rotary kiln communicates with drying grate, and at rotary kiln afterbody, rotary kiln afterbody chute is installed, bucket machine is arranged on below ash bin and rotary kiln afterbody chute, for transporting whole returning charge, and by the return conveyer conveyor of drying grate tail end, returning charge is transported to vibratory screening apparatus.Bucket machine is collected returning charge classification process after screening by the utility model, and the internal recycling realizing returning charge uses, and improves quality of green pellets and production capacity, improves revolution kiln atmosphere, make rotary kiln not ring formation, extend rotary kiln service life of refractory material.
Description
Technical field
The utility model relates to grate kiln pelletizing technical field, more particularly, relates to a kind of revert system of grate-kiln pelletizing production line.
Background technology
Along with China's " chain-kiln " pelletizing process produces the fast development of acid pellet, this technique is progressively subject to the accreditation of industry.The major equipment that drying grate is produced as acid pellet, its function has green-ball drying, partial roasting and rotary kiln baking.In grate kiln production technique, how to process the maintenance of drying grate returning charge and returning charge transportation equipment, very important to the production of acid pellet.
Drying grate can be divided into drum dry section, the section of draining, preheated one-section and preheating two sections of four parts by the source of technique wind, summarize its technological process as follows:
The dry section hot blast of drum is provided by cold section of central cooler three (temperature is 300-350 DEG C).Cold blast valve installed by pipeline, after being blended into cold wind, air temperature is controlled at 180-250 DEG C.Dry air-flow is blown into the attached water of green-ball bottom the removing bed of material below the bed of material, avoids green-ball bottom the bed of material excessively wet; The section of draining hot blast is provided by drying grate preheating two sections, hot blast is blown through the bed of material and makes green-ball dehydration, drying above the bed of material, pipeline is provided with converts cold blast valve, down-draft drying zone wind-warm syndrome is made to control at about 400 DEG C after being blended into cold wind, from down-draft drying zone bellows extract out hot waste gas together with the hot waste gas extracted out from preheating I section bellows, after main electric precipitator udst separation, enter air through chimney again by main exhauster; The hot blast of preheated one-section is mainly from the hot waste gas of central cooler secondary cooling zone, and part is supplemented by the hot gas flow of preheating two sections, and green-ball continues dry, and starts oxidation, to ensure that pelletizing can bear more than 1000 DEG C high temperature preheating two sections; Preheating two sections of thermals source are from kiln tail about 1050 DEG C of hot gas flows, and preheating two sections, pelletizing carries out being oxidized and heating, and complete partial consolidation sclerosis, make pelletizing have some strength, can stand impact when falling rotary kiln by drying grate.From the hot waste gas that preheating two sections of bellows are extracted out, after high efficiency multi-tube dust-remover udst separation, deliver to down-draft drying zone as thermal source by two backheat blower fan hot air ducts.
In known grate-kiln pelletizing technology field, major part chain grate-rotary kiln production line generally has two kinds for the processing mode of drying grate returning charge: the bulk cargo of chain grate head three ash bins enters chapelet by chute together with rotary kiln bulk cargo, then returns rotary kiln.The dust that the bulk cargo of drying grate bellows and all the other ash bins are discharged is transported in the bulk cargo bucket of drying grate afterbody by bulk material belt machine, and because this part bulk cargo amount is little, design adopts automobile to be transported to stock ground for sintering.Consider that automobile is transported to stock ground large for sintering trucking costs, this part returning charge changes into and enters pelletizing revert system, realizes material internal recycle.
Melon seeds sheet in the program in returning charge, macrobead flour enter pelletizing system, directly affect quality of green pellets, and then cracked in drying grate preheating and baking process.Affect yield rate on the one hand, reduce production capacity; On the other hand powder enters kiln, makes the easy ring formation of rotary kiln, and its consequence is that coming off of ring formation bulk increases the labor capacity that operative employee processes bulk, and the peeling off of the subsidiary resistance to material of coming off of ring formation bulk, shortens the work-ing life of the resistance to material of rotary kiln, affect rotary kiln normal operation simultaneously.In addition, the bulk cargo of head, kiln tail returns rotary kiln through chapelet and makes the resistance to material serious wear in local to washing away of the resistance to material of large chute, the resistance to material of wearing and tearing concentrates on the discharging point place of chapelet, the whole service life of resistance to material shortens, repair the time that resistance to material needs more than three days, affect administration measure direct motion; In returning charge, dust is more, and revolution kiln atmosphere is poor, also can cause ring formation of rotary kiln.Therefore, how to make the operation steady in a long-term, effective of grate kiln production unit very important.
By retrieval, in newpapers and periodicals " Zhengzhou Railway Vocational and Technical College's journal " the 25th volume the 4th phase that in December, 2013 publishes, one " system of horse steel pellet grate returning charge is improved " scheme is also disclosed in 20 to 22 pages, the program is provided with the bucket elevator received from rotary kiln afterbody chute and three the ash bin returning charges of ash bin head, bucket machine is provided with below drying grate preheated one-section and preheating two sections of ash bins, rotary conveyor one end is connected with bucket machine, receives the returning charge from the dry section of drying grate drum and the section of draining; Below the rotary conveyor the other end, vibratory screening apparatus is housed.The powder that This solution avoids from preheated one-section and preheating two sections below ash bin enters rotary kiln, but enter in the returning charge of bucket elevator and still there is melon seeds sheet and macrobead bulk cargo, directly affect quality of green pellets, and can impact the resistance to material of chute when blanking, cause chute to reduce work-ing life.
Utility model content
1. the utility model technical problem that will solve
The purpose of this utility model is to solve melon seeds sheet in balling process in returning charge, macrobead flour easily affects pelletizing quality, the easy ring formation of rotary kiln, and the problem that the resistance to material of rotary kiln afterbody chute is subject to wash away and weares and teares, provide a kind of revert system of grate-kiln pelletizing production line.The utility model adopts bucket machine to receive whole returning charge, and classification process after screening, the internal recycling realizing returning charge uses, and improves quality of green pellets and production capacity, improves revolution kiln atmosphere, make rotary kiln not ring formation, extend rotary kiln service life of refractory material.
2. technical scheme
For achieving the above object, the technical scheme that the utility model provides is:
The revert system of a kind of grate-kiln pelletizing production line of the present utility model, comprise drying grate, bucket machine, return conveyer conveyor, and the rotary kiln to connect with chain grate head, be provided with ash bin on the downside of described drying grate, this ash bin collects the returning charge from green-ball in drying grate; Described rotary kiln communicates with drying grate, and at rotary kiln afterbody, rotary kiln afterbody chute is installed, described bucket machine is arranged on below ash bin and rotary kiln afterbody chute, for transporting the returning charge of ash bin and rotary kiln afterbody trough outlet, and by the return conveyer conveyor of drying grate tail end, returning charge is transported to vibratory screening apparatus.
Further improve as the utility model, described bucket machine is provided with sprinkler system.
Further improve as the utility model, described revert system also comprises screening material rotary conveyor and hopper, and described screening material rotary conveyor is connected with vibratory screening apparatus; Described hopper is arranged on the below of vibratory screening apparatus.
Further improve as the utility model, described vibratory screening apparatus is bar screen, and rod gap is 6 millimeters.
3. beneficial effect
The technical scheme adopting the utility model to provide, compared with prior art, has following beneficial effect:
(1) revert system of a kind of grate-kiln pelletizing production line of the present utility model, whole returning charges of rotary kiln afterbody chute and ash bin are transported to vibratory screening apparatus through bucket machine and return conveyer conveyor, the work in-process ball being greater than 6mm of screening returns to drying grate and carries out roasting, and the powder being less than 6mm reenters pelletizing system, improve quality of green pellets, improve revolution kiln atmosphere, make rotary kiln not ring formation;
(2) revert system of a kind of grate-kiln pelletizing production line of the present utility model, re-uses after returning charge classification process, realizes the internal recycle of material, save material transportation cost, improve output;
(3) revert system of a kind of grate-kiln pelletizing production line of the present utility model, the returning charge of rotary kiln afterbody chute is transported through bucket machine, avoid washing away resistance to material on rotary kiln afterbody chute, decrease the wearing and tearing of the resistance to material of rotary kiln afterbody chute, decrease reparation number of times, contribute to normally carrying out of production;
(4) revert system of a kind of grate-kiln pelletizing production line of the present utility model, it is returning charge cooling that bucket machine arranges sprinkler system, returning charge transfer device is set between bucket machine and return conveyer conveyor, decreases high temperature and material and wash away infringement to return conveyer conveyor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the revert system of a kind of grate-kiln pelletizing production line of the present utility model;
Fig. 2 is pellet formation process flow sheet of the present utility model.
Label declaration in schematic diagram: 1, drying grate; 101, ash bin; 2, rotary kiln; 201, rotary kiln afterbody chute; 3, green-ball; 4, bucket machine; 5, return conveyer conveyor; 6, vibratory screening apparatus; 7, screening material rotary conveyor; 8, hopper.
Embodiment
For understanding content of the present utility model further, by reference to the accompanying drawings the utility model is described in detail.
Embodiment 1
The revert system of a kind of grate-kiln pelletizing production line of the present embodiment, primarily of compositions such as drying grate 1, bucket machine 4, return conveyer conveyor 5 and the rotary kilns 2 that connects with drying grate 1 head.Be provided with ash bin 101 on the downside of drying grate 1 in the present embodiment, this ash bin 101 receives the returning charge from green-ball 3 in drying grate 1; Described rotary kiln 2 communicates with drying grate 1, and at rotary kiln 2 afterbody, rotary kiln afterbody chute 201 is installed, described bucket machine 4 is arranged on below ash bin 101 and rotary kiln afterbody chute 201, for collecting, transporting the returning charge of ash bin 101 and the outlet of rotary kiln afterbody chute 201.Because the material air-teturning temperature in three ash bins 101 of drying grate 1 head is higher, in order to speed its cooling rate, bucket machine 4 is provided with sprinkler system.Drying grate 1 tail end is connected with return conveyer conveyor 5, is connected between bucket machine 4 with return conveyer conveyor 5 by returning charge transfer device, avoids the returning charge that bucket machine 4 is toppled over to impact return conveyer conveyor 5.Be connected with vibratory screening apparatus 6 at return conveyer conveyor 5 afterbody, this vibratory screening apparatus 6 is bar screens, and rod gap is 6 millimeters.Below vibratory screening apparatus 6, be provided with hopper 8, be less than the powder of 6 millimeters for collecting granules degree, this hopper 8 is connected with green-ball crushing system, and green-ball crushing system delivered to by the powder granularity of collection being less than 6 millimeters, carries out pelletizing again; With screening, vibratory screening apparatus 6 afterbody expects that rotary conveyor 7 is connected, this screening material rotary conveyor 7 is high angle belt conveyer conveyor, its lift height is 8 ~ 12m, is 9.8m specific to the present embodiment, is connected with reciprocating motion type rotary conveyor at screening material rotary conveyor 7 discharge gate.The work in-process ball that granularity is greater than 6 millimeters by this screening material rotary conveyor 7 is transported to reciprocating motion type rotary conveyor, and even for material cloth on drying grate charge level, re-starts roasting.
Below pellet formation technique is briefly described:
1) green-ball 3 enters that drying grate 1 is air-dry, after roasting, enters rotary kiln 2.
2) returning charge in rotary kiln afterbody chute 201 and ash bin 101 is collected by bucket machine 4, is transported; Because three ash bin 101 internal return temperature of rotary kiln afterbody chute 201 and drying grate 1 head are high, be greater than 600 DEG C, ordinary straps can not be transported, and adopts bucket machine 4 to transport effective, and is lowered the temperature to returning charge by sprinkler system.
3) the anti-material after cooling is transported to return conveyer conveyor 5 by returning charge transfer device, is then delivered to vibratory screening apparatus 6 through return conveyer conveyor 5 and sieves; Returning charge transfer device wherein plays the effect be excessively connected, and reduces material to the impact of return conveyer conveyor 5.
4) material that on sieve, granularity is greater than 6mm is delivered to drying grate 1 platform through screening material rotary conveyor 7, carries out cloth, again roasting by reciprocating motion type rotary conveyor; The powder that the lower granularity of sieve is less than 6mm falls into hopper 8, is directly transported to green-ball crushing system, carries out pelletizing again.
The present embodiment is transformed pellet production line, three ash bin 101 internal returns of rotary kiln 2 afterbody returning charge and drying grate 1 head no longer return rotary kiln 2 by rotary kiln afterbody chute 201, but screening process is concentrated together with the returning charge of other ash bins 101, decrease powder and enter rotary kiln 2, improve atmosphere in rotary kiln 2, ensure rotary kiln 2 steady running, extend rotary kiln 2 work-ing life; Melon seeds sheet in returning charge, macrobead flour do not enter pelletizing system, improve pellet quality, reduce energy consumption; In addition, decrease the impact to resistance to material, avoid the destruction to resistance to material, decrease frequency of maintenance, save maintenance cost, improve output.
Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (4)
1. the revert system of a grate-kiln pelletizing production line, comprise drying grate (1), bucket machine (4), return conveyer conveyor (5), and the rotary kiln (2) to connect with drying grate (1) head, it is characterized in that: described drying grate (1) downside is provided with ash bin (101), and this ash bin (101) collects the returning charge from green-ball (3) in drying grate (1); Described rotary kiln (2) communicates with drying grate (1), and at rotary kiln (2) afterbody, rotary kiln afterbody chute (201) is installed, described bucket machine (4) is arranged on ash bin (101) and rotary kiln afterbody chute (201) below, for transporting the returning charge that ash bin (101) and rotary kiln afterbody chute (201) export, and by the return conveyer conveyor (5) of drying grate (1) tail end, returning charge is transported to vibratory screening apparatus (6).
2. the revert system of a kind of grate-kiln pelletizing production line according to claim 1, is characterized in that: described bucket machine (4) is provided with sprinkler system.
3. the revert system of a kind of grate-kiln pelletizing production line according to claim 2, it is characterized in that: described revert system also comprises screening material rotary conveyor (7) and hopper (8), described screening material rotary conveyor (7) is connected with vibratory screening apparatus (6); Described hopper (8) is arranged on the below of vibratory screening apparatus (6).
4. the revert system of a kind of grate-kiln pelletizing production line according to claim 3, is characterized in that: described vibratory screening apparatus (6) is bar screen, and rod gap is 6 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520281137.9U CN204569999U (en) | 2015-04-30 | 2015-04-30 | A kind of revert system of grate-kiln pelletizing production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520281137.9U CN204569999U (en) | 2015-04-30 | 2015-04-30 | A kind of revert system of grate-kiln pelletizing production line |
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| Publication Number | Publication Date |
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| CN204569999U true CN204569999U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520281137.9U Expired - Fee Related CN204569999U (en) | 2015-04-30 | 2015-04-30 | A kind of revert system of grate-kiln pelletizing production line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108341234A (en) * | 2018-02-06 | 2018-07-31 | 攀枝花市仁通钒业有限公司 | For mine device |
| CN109250418A (en) * | 2018-09-30 | 2019-01-22 | 四川德胜集团钒钛有限公司 | Returning charge recovery system and its method for recycling returning charge in a kind of pelletizing production technique |
| CN112899470A (en) * | 2021-01-15 | 2021-06-04 | 凌源钢铁股份有限公司 | Wet returning charge deep-processing device of grate rotary kiln |
-
2015
- 2015-04-30 CN CN201520281137.9U patent/CN204569999U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108341234A (en) * | 2018-02-06 | 2018-07-31 | 攀枝花市仁通钒业有限公司 | For mine device |
| CN109250418A (en) * | 2018-09-30 | 2019-01-22 | 四川德胜集团钒钛有限公司 | Returning charge recovery system and its method for recycling returning charge in a kind of pelletizing production technique |
| CN112899470A (en) * | 2021-01-15 | 2021-06-04 | 凌源钢铁股份有限公司 | Wet returning charge deep-processing device of grate rotary kiln |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 |
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| CF01 | Termination of patent right due to non-payment of annual fee |