CN102443662B - Treatment device of liquid slag - Google Patents
Treatment device of liquid slag Download PDFInfo
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- CN102443662B CN102443662B CN2011103116862A CN201110311686A CN102443662B CN 102443662 B CN102443662 B CN 102443662B CN 2011103116862 A CN2011103116862 A CN 2011103116862A CN 201110311686 A CN201110311686 A CN 201110311686A CN 102443662 B CN102443662 B CN 102443662B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to a treatment device of liquid slag. The treatment device comprises a slag pot and a launder and is characterized by further comprising a granulating heat exchange bin, a nozzle, a heat exchanger, a cooling device and an ash conveyor; the slag pot is arranged on the launder; the nozzle and the launder are arranged at the entrance of the granulating heat exchange bin; the nozzle is arranged under the launder; the granulating heat exchange bin is provided with an air inlet and an air outlet; an ash bucket is arranged at the bottom of the granulating heat exchange bin. Perfect function settings enable the afterheat recovery effect of the device to be better.
Description
Technical field
The present invention relates to the retrieving arrangement of waste in the smelting process of iron or steel, relate in particular to a kind of liquid slag treatment unit.
Background technology
The temperature of the high-temperature molten slag of steel industry generally reaches 1600 ℃, and a large amount of heats is wasted at present.And, contain a certain proportion of iron and steel scrap in the slag, if can all reclaim then interests are huge.Simultaneously, if can improve the value added of waste residue, then interests are also very considerable.
No matter be from reclaiming the angle of melting slag sensible heat, the still angle of handling from slag, dry granulation all is to generally acknowledge the most promising technology at present, this comprises wind granulation, granulation wheel granulation, revolving cup granulation etc.
But; allow high-temperature molten slag in moment granulating and to solidify not be thing easily; general technology all is granulation easily (wind is broken, granulation wheel, revolving cup can accomplish) but solidify difficultly, makes slag be cooled to solid granulates fast so over-borrowing helps the water-cooled shrend, is convenient to subsequent disposal.Only water cold water is quenched and just is difficult to reclaim high-grade waste heat.If reclaim the slag waste heat; water-cooled shrend method certainly will will be abandoned; handle the slag heat with heat exchange chamber structure form; but the drawback of this method is exactly the dry slag problem: though liquid slag is by granulation; but because the slag heat conductivility is poor; solid impurity particle still can partly keep the semi liquid state semi-solid state in moment, causes it to adhere on the heat exchange bulkhead face.
We can say that can the flight of particle and process of setting control quality be to be related to waste heat reclaim after the liquid slag granulation, how to reclaim, how waste residue is handled, and what key issue iron and steel scrap reclaim.
The patent application 200910075336.3 of Institutes Of Technology Of Hebei " a kind of liquid slag treatment process and device " payes attention to having arrived this a succession of problem; one cover has been proposed from the gas granulation of quenching; to solid-state slag particle cooling, reclaim to sensible heat, arrive the complete scheme of cooling gas recycle again.But still there are some problems in this patent, does not obtain deep solution: (1) is not deep enough to the design of pelletizer, since the granulating influence overall situation just must be kept on improving in this link; (2) not deep enough to the design of granulation and heat exchange bin, be the problem that must run into because solid impurity particle is bonded in wall, must draw attention to this; (3) adopted cooling tank to cool off the solid slag particle, but do not noticed that solid impurity particle is the characteristics of intermittent feeding, so the design of cooling tank is perfect inadequately; (4) after the solid impurity particle cooling, still have certain temperature, and f-CaO stability is not good enough, this this patent is not better solved; (5) this patent adopts rare gas element to do broken source of the gas and recycle, and such drawback is exactly that rare gas element is generally expensive, and bigger as the required tolerance of cooling solid impurity particle.
Summary of the invention
For addressing the above problem, the present invention proposes the liquid slag treatment unit of a kind of organic efficiency height, save energy.
For achieving the above object, the technical solution used in the present invention is: the liquid slag treatment unit, comprise slag ladle, chute, and it is characterized in that: also comprise granulation heat exchange storehouse, nozzle, interchanger, refrigerating unit, cinder conveyer; Slag ladle is located on the chute, and nozzle and chute are located at ingress, granulation heat exchange storehouse, and nozzle is located at the chute below, and granulation heat exchange storehouse is provided with blast inlet, air outlet, and bottom, granulation heat exchange storehouse is provided with ash bucket,
Cinder conveyer is located under the ash bucket, is connected with refrigerating unit; Described air outlet is connected with interchanger by the outlet air channel.
First preferred version of the present invention is that described blast inlet place is communicated with gas blower.
Second preferred version of the present invention is, described granulation heat exchange storehouse is wide storehouse, narrow storehouse, and described narrow storehouse one side is communicated with one side middle part, wide storehouse, and granulation heat exchange storehouse entrance is located on the wide storehouse, and air outlet is located at narrow storehouse.
The 3rd preferred version of the present invention is that described wide storehouse is water wall.
The 4th preferred version of the present invention is that described wide storehouse and junction, narrow storehouse are provided with the changeable type water cooling tube.
The 5th preferred version of the present invention is, described nozzle comprises high pressure spray nozzle, and described high pressure spray nozzle is adjustable two-fluid high-low pressure secondary convergent nozzle.
The 6th preferred version of the present invention is, described nozzle also comprises low-pressure nozzle, and described low-pressure nozzle is located between high pressure spray nozzle and the chute.
The 7th preferred version of the present invention is, described ash bucket comprises big ash bucket, little ash bucket, and big ash bucket is located under the wide storehouse, and little ash bucket is located under the narrow storehouse.
The 8th preferred version of the present invention is, described refrigerating unit comprises buffer memory machine, cooler, and described buffer memory machine is communicated with cinder conveyer, and cooler is located at buffer memory machine below and is communicated with.
The 9th preferred version of the present invention is, described buffer memory machine is rotary type cooling storage conveyor, and described cooler is rotary type cooling machine.
The tenth preferred version of the present invention is, described cooler is established discharge port, and discharge port is divided into shallow vexed pond, and described shallow vexed pond sets out mouthful and entrance.
The 11 preferred version of the present invention is that described liquid slag treatment unit comprises magnetic separator, is connected with the outlet in shallow vexed pond.
The 12 preferred version of the present invention is to establish the heat pipe bundle in the described interchanger.
The 13 preferred version of the present invention is, described liquid liquid slag treatment unit also comprises hot water jacket, drum, and described hot water jacket is located in the interchanger, is communicated with drum.
The 14 preferred version of the present invention is, described liquid slag treatment unit also comprises fly-ash separator, induced draft fan, chimney, and interchanger is communicated with fly-ash separator, and fly-ash separator is communicated with chimney by induced draft fan.
The 15 preferred version of the present invention is, described liquid slag treatment unit comprises steam accumulator, and described steam accumulator is communicated with drum.
The 16 preferred version of the present invention is, described liquid slag treatment unit also comprises service pump, deoxygenator, and described service pump is communicated with the hot water jacket by deoxygenator.
The 17 preferred version of the present invention is that described induced draft fan is communicated with cooler by pipeline.
Technical superiority of the present invention is:
1. it is broken to adopt efficient, adjustable two-fluid high-low pressure secondary convergent nozzle to carry out gas.High pressure spray nozzle adopts the gradual shrinkage sonic nozzle, and jet exit gas band is pressed, and therefore the fragmentation of slag liquid is taken into account the dual function of winding-up gas velocity and pressure, the granulation better effects if.Low-pressure nozzle has certain pressure, is used for the slag liquid backflow that balance winding-up main air stream with pressure causes on the one hand, and the free sticky knot of protection equipment on the other hand as the two-stage crushing nozzle, improves granulation efficient; Can regulate nozzle slot height, do simple just the adjustment and can adapt to different work tempos; Can adopt different types of gaseous media to make the broken source of the gas of gas flexibly, as steam, pressurized air, compressed nitrogen etc.
2. adopt antiseized type granulation heat exchange storehouse.Front wide and rear narrow shape is made in the heat exchange storehouse, can save equipment and materials.Wide section is main dry slag zone, adopts the water wall can guard key dry slag problem; Narrow section is adopted common planomural face, reduces investment outlay.The used water cooling tube of pushing off the slag makes the puzzlement of narrow section no dry slag of back.Cold air inlet be arranged on pelletizer under, on the one hand guarantee to have at any time air and the high temperature sludge heat exchange of low temperature, allow the cold wind air-flow play the lifting effect on the other hand, delay Granula Subsidence Time.
3. adopt the solid steel slag buffer memory and cooling unit that can adapt to intermittent feeding.Though this covering device output investment ratio separate unit rotary type cooling machine is big, how has been equivalent to a buffer memory machine, homogeneity, continuity to the hot blast air-out have had a lot of raisings to operation stability of equipment, security; And the adjustability of this complete equipment is strong, can control the out temperature of material and heat exchange air flexibly.
4. the slag after having adopted shallow vexed pond to granulation is made stabilizing treatment, and the time cycle is shorter, takes up an area of still less, does not influence the slag waste heat recovery of leading portion.
5. hot tube heat exchanger is adopted in waste heat recovery, and is efficient and safe and reliable.
6. adopt flue gas recirculation, improved heat utilization ratio.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the present embodiment structural representation.
Fig. 2 is present embodiment granulation heat exchange storehouse vertical view.
Accompanying drawing mark: 1; slag ladle 2; chute 3a; low-pressure nozzle 3b; high pressure spray nozzle 4; entrance air channel 5; gas blower 6a; macrobead ash bucket 6b; small-particle ash bucket 7; planomural face 8; replaceable water wall 9; water wall 10; outlet air channel 11; softening water tank 12; service pump 13; deoxygenator 14; water jacket 15; heat pipe bundle 16; drum 17; steam accumulator 18; fly-ash separator 19; induced draft fan 20; chimney 21; cinder conveyer 22a; buffer memory machine 22b; cooler 23; booster fan 24; shallow vexed pond 25; excavator 26; magnetic separator 27; iron and steel scrap 28; waste residue 291; 292; 293; 294; 295; 296; valve 297; cold blast valve.
Embodiment
As Fig. 1, Fig. 2; the high-temperature liquid state slag that comes out from converter or electric furnace etc. is flowed out through chute 2 by cinder ladle 1; be granulated into big and small particle through debris crasher 3; the flight of part larger particles namely falls than short range; taken in by macrobead ash bucket 5; residue falls than small-particle flight more again, is taken in by small-particle ash bucket 6.The cold wind that is used for cooling particulate is entered by air intake vent 4, and exchanging for becomes hot blast behind the slag heat and discharged by air port 10, remakes waste heat recovery processing.
The solid impurity particle of being collected by ash bucket 6 flows to buffer memory machine 22a and cooler 22b carries out the heat exchange of solid slag particle through cinder conveyer 21.The solid impurity particle of last lesser temps is gone into shallow vexed pond 24 and is carried out stabilizing treatment, digs out through excavator 25 then, magneticly elects iron and steel scrap 27 through magnetic separator 26, and waste residue 28 can be made cement raw material or the usefulness of paving the way.
The flue gas flow that participates in solid impurity particle heat exchange and hot flue gas waste heat recovery is as follows: freezing air is gone into the preliminary and solid impurity particle heat exchange intensification of cooler 22b through booster fan 23; enter buffer memory machine 22a then and further heat up, the solid impurity particle that enters subsequently in granulation heat exchange storehouse 7 and the granulation flight course carries out heat exchange.The hot flue gas of all finishing after the slag thermal exchange enters hot tube heat exchanger system recoveries waste heat from exporting 10, tail gas enters atmosphere through fly-ash separator 18, induced draft fan 19 and chimney 20 parts, the part recycle is made booster fan 23 and is entered buffer memory cooler 22 with freezing air.
It is such adopting the residual neat recovering system of hot tube heat exchanger: the heat pipe bundle 15 that is arranged in the Heat Room absorbs dust-laden high-temperature flue gas heat, adds the water among the hot water jacket 14, makes it to become saturation steam and rises in the drum 16.The steam that drum 16 is produced enters steam accumulator 17 and carries out accumulation, supplies with the user through valve 291 and uses.Before the liquid steel slag granulation system does not start, use (situation when only at broken gas adopting water vapor) for debris crasher initial granulation for steam through valve 292,293 by outer.The feedwater of water jacket 14 is made up of conventional systems such as deoxygenator 13, service pump 12, softening water tanks 11.
Claims (8)
1. the liquid slag treatment unit comprises slag ladle, chute, it is characterized in that: also comprise granulation heat exchange storehouse, nozzle, interchanger, refrigerating unit, cinder conveyer; Slag ladle is located on the chute, and nozzle and chute are located at ingress, granulation heat exchange storehouse, and nozzle is located at the chute below, and granulation heat exchange storehouse is provided with blast inlet, air outlet, and bottom, granulation heat exchange storehouse is provided with ash bucket,
Cinder conveyer is located under the ash bucket, is connected with refrigerating unit; Described air outlet is connected with interchanger by the outlet air channel;
Described granulation heat exchange storehouse is wide storehouse, narrow storehouse, and described narrow storehouse one side is communicated with one side middle part, wide storehouse, and granulation heat exchange storehouse entrance is located on the wide storehouse, and air outlet is located at narrow storehouse;
Described wide storehouse is water wall;
Described wide storehouse and junction, narrow storehouse are provided with the changeable type water cooling tube;
Described nozzle comprises high pressure spray nozzle, and described high pressure spray nozzle is adjustable two-fluid high-low pressure secondary convergent nozzle;
Described nozzle also comprises low-pressure nozzle, and described low-pressure nozzle is located between high pressure spray nozzle and the chute;
Described ash bucket comprises big ash bucket, little ash bucket, and big ash bucket is located under the wide storehouse, and little ash bucket is located under the narrow storehouse;
Described refrigerating unit comprises buffer memory machine, cooler, and described buffer memory machine is communicated with cinder conveyer, and cooler is located at buffer memory machine below and is communicated with;
Described buffer memory machine is rotary type cooling storage conveyor, and described cooler is rotary type cooling machine;
Described cooler is established discharge port, and discharge port is divided into shallow vexed pond, and described shallow vexed pond sets out mouth and entrance;
Described liquid slag treatment unit comprises magnetic separator, is connected with the outlet in shallow vexed pond.
2. according to the described liquid slag treatment unit of claim 1, it is characterized in that: described blast inlet place is communicated with gas blower.
3. according to the described liquid slag treatment unit of claim 1, it is characterized in that: establish the heat pipe bundle in the described interchanger.
4. according to claim 1 or 3 described liquid slag treatment unit, it is characterized in that: described liquid slag treatment unit also comprises hot water jacket, drum, and described hot water jacket is located in the interchanger, is communicated with drum.
5. according to the described liquid slag treatment unit of claim 1, it is characterized in that: described liquid slag treatment unit also comprises fly-ash separator, induced draft fan, chimney, and interchanger is communicated with fly-ash separator, and fly-ash separator is communicated with chimney by induced draft fan.
6. according to the described liquid slag treatment unit of claim 4, it is characterized in that: described liquid slag treatment unit comprises steam accumulator, and described steam accumulator is communicated with drum.
7. liquid slag treatment unit according to claim 4, it is characterized in that: described liquid slag treatment unit also comprises service pump, deoxygenator, and described service pump is communicated with the hot water jacket by deoxygenator.
8. according to the described liquid slag treatment unit of claim 5, it is characterized in that: described induced draft fan is communicated with cooler by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103116862A CN102443662B (en) | 2011-10-14 | 2011-10-14 | Treatment device of liquid slag |
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| CN2011103116862A CN102443662B (en) | 2011-10-14 | 2011-10-14 | Treatment device of liquid slag |
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| CN102443662A CN102443662A (en) | 2012-05-09 |
| CN102443662B true CN102443662B (en) | 2013-10-02 |
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| CN103173590B (en) * | 2013-03-27 | 2015-05-20 | 马鞍山市双益机械制造有限公司 | On-line KR desulfuration residue treatment device and method applied to hot metal pretreatment process |
| CN103642956B (en) * | 2013-12-06 | 2015-11-25 | 无锡市东方环境工程设计研究所有限公司 | Liquid blast furnace slag granulation and multiple-roll residual neat recovering system |
| CN105110661B (en) * | 2015-08-21 | 2017-10-31 | 河南科技大学 | A kind of liquid slag granulation and waste-heat recovery device |
| CN105180163B (en) * | 2015-09-18 | 2017-11-17 | 青岛达能环保设备股份有限公司 | CFBB classification cooling dreg removing system |
| CN106282447B (en) * | 2016-09-21 | 2018-07-03 | 重庆大学 | There is the slag dry granulation waste-heat recovery device of self-regulation and Anti-slagging |
| CN109128201A (en) * | 2017-06-28 | 2019-01-04 | 江西瑞林稀贵金属科技有限公司 | The system and method for handling raw copper smelting |
| CN107477551B (en) * | 2017-08-22 | 2019-06-04 | 上海驰春节能科技有限公司 | A kind of dry slag waste heat boiler of quenching |
| CN107806769B (en) * | 2017-09-05 | 2020-08-11 | 天津大学 | Method and device for recycling heat energy of molten metallurgical slag |
| CN107674932B (en) * | 2017-09-05 | 2020-08-11 | 天津大学 | Efficient hot air generation method and device for metallurgy |
| CN108993891B (en) * | 2018-06-29 | 2020-04-14 | 东北大学 | Liquid magnesium chloride granulating and particle grading collecting device and method |
| CN109943673B (en) * | 2019-03-22 | 2021-10-29 | 北京硕人节能环保技术有限公司 | Smelting molten slag air-fog double-fluid granulation treatment process and device |
| CN110747302A (en) * | 2019-10-31 | 2020-02-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel slag wind quenching device and steel slag granulating method |
| WO2024125565A1 (en) * | 2022-12-13 | 2024-06-20 | 宝山钢铁股份有限公司 | Recuperative waste heat recovery system and method for high-temperature solid slag particles |
| CN117387387B (en) * | 2023-10-30 | 2024-08-02 | 宁波力勤资源科技股份有限公司 | Waste heat recovery device and method for high-temperature slag |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101921884B (en) * | 2009-06-12 | 2012-06-27 | 中国科学院过程工程研究所 | Blast furnace slag dry-type sensible heat recovery system and production process |
| CN101691620B (en) * | 2009-09-10 | 2011-06-08 | 河北理工大学 | Process and device for processing liquid steel slag |
| CN201785403U (en) * | 2010-07-08 | 2011-04-06 | 无锡市东方环境工程设计研究所有限公司 | Reclaiming system for high-temperature melting slag |
| CN101886148A (en) * | 2010-07-08 | 2010-11-17 | 无锡市东方环境工程设计研究所有限公司 | Method for recovering high-temperature molten slag |
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