CN1786217A - Two stage screening technology of smelting-pelletizing green ball and its screening device - Google Patents
Two stage screening technology of smelting-pelletizing green ball and its screening device Download PDFInfo
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- CN1786217A CN1786217A CN 200510123996 CN200510123996A CN1786217A CN 1786217 A CN1786217 A CN 1786217A CN 200510123996 CN200510123996 CN 200510123996 CN 200510123996 A CN200510123996 A CN 200510123996A CN 1786217 A CN1786217 A CN 1786217A
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Abstract
The invention relates to metallurgy ball green ball two ways sieving technique. It includes the following steps: material drying and mixing; transporting the material to disk pelletizer to pelletize; transporting the produced green ball to the first sieve, separating screen out green ball with more than 16mm ball diameter and smashing to powder with less than 8mm; transporting the rest to the second sieve; sieving the powder with less than 10mm and small ball; returning the rest to the disk pelletizer to pelletize; sieving out the qualified green ball and transporting to baking system. The acceptable sieve setting includes sieve body, one to three pairs of crushing rollers with spiral tooth flank; each pair has two opposite rotating crushing rollers. The two crushing rollers is formed resilient coupling. Rolling wheel and guide rail are set at the under-part of the sieve body.
Description
Technical field
The invention belongs to metallurgical briquetting green-ball manufacturing process technology field, especially a kind of two stage screening technology of smelting-pelletizing green ball and screening device with the big ball function of pulverizing.
Background technology
At present, the green-ball screening system of metallurgical briquetting manufacturer, roughly can be divided into two kinds of situations: one sieving technology that 1, only screens out bead, with make that the ball system comes out＜8mm bead and powder screen out, return balling disk (-sc) and make ball again, and＞8mm part all enters into next step roasting system.The problem that this technology exists is that big ball does not obtain handling.2, twice sieving technology, twice sieve or two-layer sieve before and after establishing, the first road sieve screens out big ball, promptly＞the 20mm part, the second road sieve screens out＜bead and the powder of 8mm, and screen out part and return balling disk (-sc) and make ball again, and qualified part enters into roasting system between 8mm and 20mm.The problem that this technology exists is, turns back to balling disk (-sc) greater than the big ball of 20mm, need make the ball worker and pat to pulverizing with manual type, and labour intensity arrives, and effect is undesirable.
In addition, these two kinds of sieve nests that technology adopted, its mechanism is welded on sieve nest on the support, because in actual applications, the space, installation position of general sieve is narrow and small, therefore the sieve nest of this mechanism is very inconvenient when changing maintenance.
Summary of the invention
One of purpose of the present invention provides a kind of two stage screening technology of smelting-pelletizing green ball of pulverizing big ball function, reducing the internal recycling amount of big ball that has.
Another object of the present invention provides a kind of screening device that is applicable to above-mentioned two stage screening technology of smelting-pelletizing green ball.
Technical scheme of the present invention is: two stage screening technology of smelting-pelletizing green ball comprises the following steps: (1) raw material stoving, mixing; (2) will dry, mixed raw material is transported to balling disk (-sc) and makes ball; (3) green-ball with balling disk (-sc) production is transported to first road sieve, and first road sifts out sphere diameter＞16mm green-ball and pulverizes and is the powder of sphere diameter＜8mm, and clout is sent to secondary screen; Powder and the bead of sphere diameter＜10mm sifted out in the screening of (4) second roads specially; (5) by the clout of secondary screen, promptly bead, powder return balling disk (-sc) and make ball again by return conveyer, and the release mesh green-ball is sent to roasting system on the sieve.
Preferably, first road sifts out sphere diameter＞20mm green-ball and pulverizes and is the powder of sphere diameter＜6mm.
Preferably, powder and the bead of sphere diameter＜8mm sifted out in the screening of second road specially.A kind of screening device that is applicable to two stage screening technology of smelting-pelletizing green ball, comprise sieve nest, end at described sieve nest is provided with 1 to 3 pair of breaker roll of being with helical tooth flank, and every pair of breaker roll is made up of two breaker rolls that rotate in opposite directions, is flexible connection between described two breaker rolls.
Elastic pressure between described two breaker rolls is more than the 5Kg.
Be provided with guide rail and scroll wheel in sieve nest bottom, be provided with support below the guide rail.
The angle of described sieve nest and horizontal plane is 5-20 °.
Preferably, the horizontal sextant angle of described sieve nest is 10-13 °.
Effect of the present invention is:
Two stage screening technology of smelting-pelletizing green ball of the present invention is transported to first road sieve with the green-ball of balling disk (-sc) production, and first road sifts out sphere diameter＞16mm green-ball and pulverizing is the powder of sphere diameter＜8mm, and clout is sent to secondary screen; Powder and the bead of sphere diameter＜10mm sifted out in the screening of second road specially; By the clout of secondary screen, promptly bead, powder return balling disk (-sc) and make ball again by return conveyer, and the release mesh green-ball is sent to roasting system on the sieve.
Compare with sieving technology, both screened out＜bead and the powder of 10mm, screened out again and pulverized＞the big ball of 16mm, in the green-ball materials flow＞the big ball of 16mm reduced more than 90% than before; Compare with common twice sieving technology, can on big ball sieve, sift out, pulverize by the big ball of general＞15mm part, basically eliminate the big ball in the returns, significantly reduced and made the workload that the ball worker pulverizes big ball, reduced the internal recycling amount of big ball, improved the ventilation property of roasting process, the air-flow that has improved roasting process distributes.
For screening device, be provided with the breaker roll of 1 to 3 pair of band helical tooth flank at the sieve nest end, two breaker rolls of every pair of breaker roll rotate in opposite directions, connecting into elasticity with back-moving spring between two breaker rolls connects, elastic pressure is more than 5kg, and when meeting hard thing, the rear end discaling roll is strutted, hard thing is leaked down, and normal green-ball hardness does not reach the degree that discaling roll is strutted; The angle of sieve nest and horizontal plane is 5-20 °, can guarantee the proper flow of materials flow; Be provided with guide rail and scroll wheel in sieve nest bottom, be provided with support below the guide rail, whole sieve nest can be pulled out leather belt head roller bottom when needed, in bigger space, overhaul, produce in the maintenance process and can carry out as usual.
Description of drawings
Fig. 1 is the structural representation of screening device of the present invention;
Fig. 2 is that the A of Fig. 1 is to view.
Embodiment
The present invention is described further below in conjunction with embodiment.
Embodiment 1: referring to Fig. 1, Fig. 2, two stage screening technology of smelting-pelletizing green ball comprises the following steps: (1) raw material stoving, mixing; (2) will dry, mixed raw material is transported to balling disk (-sc) and makes ball; (3) green-ball with balling disk (-sc) production is transported to first road sieve, and first road sifts out sphere diameter＞16mm green-ball and pulverizes and is the powder of sphere diameter＜8mm, and clout is sent to secondary screen; Powder and the bead of sphere diameter＜10mm sifted out in the screening of (4) second roads specially; (5) by the clout of secondary screen, promptly bead, powder return balling disk (-sc) and make ball again by return conveyer, and the release mesh green-ball is sent to roasting system on the sieve.
Be applicable to the screening device of two stage screening technology of smelting-pelletizing green ball, comprise sieve nest 1, the quantity of the width of described sieve nest 1 and sieve roller 2 determines according to production requirement, is provided with at the end of described sieve nest 1 between 3, two breaker rolls of the breaker roll of rotation in opposite directions of 1 pair of band helical tooth flank to be flexible connection; Sieve nest 1 is 13 ° with the angle 8 of horizontal plane, be provided with guide rail 5 and scroll wheel 6 in sieve nest 1 bottom, be provided with support 7 below the guide rail 5, connect into elasticity with back-moving spring 4 between the breaker roll 3 and connect, elastic pressure is more than 5kg, when meeting hard thing, terminal discaling roll will be strutted, and hard thing is leaked down, and normal green-ball hardness does not reach the degree that discaling roll is strutted; The sieve nest bottom is equipped with roller, and guide rail is fixed on the support.
Embodiment 2: referring to Fig. 1, Fig. 2, two stage screening technology of smelting-pelletizing green ball comprises the following steps: (1) raw material stoving, mixing; (2) will dry, mixed raw material is transported to balling disk (-sc) and makes ball; (3) green-ball with balling disk (-sc) production is transported to first road sieve, and first road sifts out sphere diameter＞20mm green-ball and pulverizes and is the powder of sphere diameter＜6mm, and clout is sent to secondary screen; Powder and the bead of sphere diameter＜8mm sifted out in the screening of (4) second roads specially; (5) by the clout of secondary screen, promptly bead, powder return balling disk (-sc) and make ball again by return conveyer, and the release mesh green-ball is sent to roasting system on the sieve.
Be applicable to the screening device of two stage screening technology of smelting-pelletizing green ball, comprise sieve nest 1, the quantity of the width of described sieve nest 1 and sieve roller 2 is determined according to production requirement, be provided with the breaker roll 3 of 2 pairs of band helical tooth flanks at the end of described sieve nest 1, every pair of breaker roll is made up of two breaker rolls 3 that rotate in opposite directions, is flexible connection between described two breaker rolls 3; Sieve nest 1 is 10 ° with the angle 8 of horizontal plane, be provided with guide rail 5 and scroll wheel 6 in sieve nest 1 bottom, be provided with support 7 below the guide rail 5, connecting into elasticity with back-moving spring 4 between the breaker roll 3 connects, elastic pressure is more than 5kg, and when meeting hard thing, terminal discaling roll will be strutted, hard thing is leaked down, and normal green-ball hardness does not reach the degree that discaling roll is strutted.The sieve nest bottom is equipped with roller, and guide rail is fixed on the support.
Claims (7)
1, a kind of two stage screening technology of smelting-pelletizing green ball is characterized in that comprising the following steps: (1) raw material stoving, mixing; (2) will dry, mixed raw material is transported to balling disk (-sc) and makes ball; (3) green-ball with balling disk (-sc) production is transported to first road sieve, and first road sifts out sphere diameter＞16mm green-ball and pulverizes and is the powder of sphere diameter＜8mm, and clout is sent to secondary screen; Powder and the bead of sphere diameter＜10mm sifted out in the screening of (4) second roads specially; (5) by the clout of secondary screen, promptly bead, powder return balling disk (-sc) and make ball again by return conveyer, and the release mesh green-ball is sent to roasting system on the sieve.
2, two stage screening technology of smelting-pelletizing green ball according to claim 1 is characterized in that first road sifts out sphere diameter＞20mm green-ball and pulverizing is the powder of sphere diameter＜6mm.
3, two stage screening technology of smelting-pelletizing green ball according to claim 1 and 2 is characterized in that second road sieves powder and the bead that sifts out sphere diameter＜8mm specially.
4, a kind of screening device that is applicable to the described two stage screening technology of smelting-pelletizing green ball of above-mentioned each claim, comprise sieve nest, it is characterized in that being provided with the breaker roll of 1 to 3 pair of band helical tooth flank at the end of described sieve nest, every pair of breaker roll is made up of two breaker rolls that rotate in opposite directions, be flexible connection between described two breaker rolls, the angle of described sieve nest and horizontal plane is 5-20 °.
5, the screening device of two stage screening technology of smelting-pelletizing green ball according to claim 4 is characterized in that the elastic pressure between described two breaker rolls is more than the 5Kg.
6, the screening device of two stage screening technology of smelting-pelletizing green ball according to claim 4, the horizontal sextant angle that it is characterized in that described sieve nest is 10-13 °.
7, according to the screening device of any described two stage screening technology of smelting-pelletizing green ball of claim 4 to 6, it is characterized in that being provided with guide rail and scroll wheel in the bottom of described sieve nest, be provided with support below the guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101239966A CN100510122C (en) | 2005-11-25 | 2005-11-25 | Screening device suitable for two stage screening technology of smelting-pelletizing green ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101239966A CN100510122C (en) | 2005-11-25 | 2005-11-25 | Screening device suitable for two stage screening technology of smelting-pelletizing green ball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1786217A true CN1786217A (en) | 2006-06-14 |
| CN100510122C CN100510122C (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101239966A Expired - Fee Related CN100510122C (en) | 2005-11-25 | 2005-11-25 | Screening device suitable for two stage screening technology of smelting-pelletizing green ball |
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| CN (1) | CN100510122C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492767B (en) * | 2008-01-23 | 2010-12-08 | 四川龙蟒矿冶有限责任公司 | Multi-stage whole-granule processing method and equipment for direct reduction of greenball |
| CN102952938A (en) * | 2011-08-26 | 2013-03-06 | 宝山钢铁股份有限公司 | Method for processing fine ores used for blast furnace smelting by using raw ores |
| CN106702148A (en) * | 2016-12-11 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Disc type pelletizer provided with screening 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 |
| CN113652547A (en) * | 2021-08-16 | 2021-11-16 | 中南大学 | Method and system for producing double-layer pellets |
-
2005
- 2005-11-25 CN CNB2005101239966A patent/CN100510122C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492767B (en) * | 2008-01-23 | 2010-12-08 | 四川龙蟒矿冶有限责任公司 | Multi-stage whole-granule processing method and equipment for direct reduction of greenball |
| CN102952938A (en) * | 2011-08-26 | 2013-03-06 | 宝山钢铁股份有限公司 | Method for processing fine ores used for blast furnace smelting by using raw ores |
| CN102952938B (en) * | 2011-08-26 | 2014-07-23 | 宝山钢铁股份有限公司 | Method for processing fine ores used for blast furnace smelting by using raw ores |
| CN106702148A (en) * | 2016-12-11 | 2017-05-24 | 北京神雾环境能源科技集团股份有限公司 | Disc type pelletizer provided with screening 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 |
| CN113652547A (en) * | 2021-08-16 | 2021-11-16 | 中南大学 | Method and system for producing double-layer pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100510122C (en) | 2009-07-08 |
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Granted publication date: 20090708 Termination date: 20131125 |