CN102586532A - Direct reduction iron cooling device - Google Patents
Direct reduction iron cooling device Download PDFInfo
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- CN102586532A CN102586532A CN2012100596415A CN201210059641A CN102586532A CN 102586532 A CN102586532 A CN 102586532A CN 2012100596415 A CN2012100596415 A CN 2012100596415A CN 201210059641 A CN201210059641 A CN 201210059641A CN 102586532 A CN102586532 A CN 102586532A
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- chain scraper
- scraper conveyors
- water
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Abstract
The invention discloses a direct reduction iron cooling device which comprises high-temperature chain scraper conveyors, a first cooling section, a second cooling section and a third cooling section, wherein the first cooling section, the second cooling section and the third cooling section are arranged along the conveying direction and respectively provided with a flowmeter and a valve, and the water volume can be adjusted; and the high-temperature chain scraper conveyors are provided with infrared thermometers and can be adjusted according to a cooling condition. In the invention, two high-temperature chain scraper conveyors are arranged, so that reduction iron and water can be mutually agitated when the high-temperature chain scraper conveyors run, and the reduction iron and the water are more uniformly mixed; the tail parts of the two chain scraper conveyors are both provided with the infrared thermometers, and variable frequency speed regulation is adopted to the chain scraper conveyors; the three cooling sections are all provided with the flowmeters and water volume regulation devices, so that the whole cooling process can be controlled; the bottoms of the chain scraper conveyors are provided with water washing pipes, and when disintegrating slag accumulation appears, the water washing pipes are opened to wash the disintegrating slag into a slag bath for treatment.
Description
Technical field
The present invention relates to a kind of refrigerating unit, be specifically related to be applicable in a kind of field of metallurgy the dri refrigerating unit of rotary hearth furnace place production technology.
Background technology
Rotary hearth furnace directly reduces one of major technique as non-blast furnace ironmaking, and it obtains common concern with meliority such as the simple and economical property of flow process are good.This technology is processed carbonaceous pelletizing with iron-bearing material; Go into rotary hearth furnace after the oven dry, 1200-1300 ℃ reduction zone is reduced to metallized pellet with carbonaceous pelletizing in stove; ZnO in the pelletizing is reduced into Metal Zn, and the metallic zinc volatilization gets into and reoxidizes generation ZnO in the flue gas; Can obtain being rich in the secondary dust of ZnO again through the collection to flue dust, the metallized pellet of producing can supply blast furnace and electric furnace to use.Reclaim when this technology has realized Fe, Zn, solved the problem that Iron And Steel Plant's difficulty is utilized zinc-containing dust preferably.
But because pelletizing needs to come out of the stove to guarantee the steady running of drawing mechanism at comparatively high temps, store and transportation, need the high temperature pelletizing is cooled off for ease of pelletizing.
At present both at home and abroad the type of cooling to direct reducting pellet mainly contains two kinds, and one, the waters cooling: be about to the high temperature pelletizing and directly immerse in the water and cool off, this mode cooling intensity is big, the short period of time cooling, but the finished product water cut is high; Two, cooling indirectly: generally adopt the cooling cylinder form, water does not directly contact with material, and cooling intensity is low, and the time is long, and interaction is arranged between the pelletizing, and chip index is about 30%, and scrap rate is higher.
The rotary hearth furnace technology is fast-developing, and above-mentioned cooling technology can not satisfy the demand of rotary hearth furnace, needs the new cooling technology of exploitation.
Summary of the invention
Goal of the invention: in order to overcome the deficiency that exists in the prior art, the present invention provides a kind of dri refrigerating unit.
Technical scheme: to achieve these goals; A kind of dri refrigerating unit of the present invention; Comprise the high temperature chain mat machine, according to one section of the cooling of throughput direction setting, two sections of coolings with cool off three sections, one section of said cooling, two sections of coolings and cool off three sections and flow is set takes into account valve, the water yield is adjustable; Said high temperature chain mat machine configuration infrared thermometer can be adjusted according to the cooling situation.
One section cooling section for the employing spray cooling of said cooling cools off one section and adopts the solid cone shaped nozzle, and atomizing particle size is less than 0.2mm, and nozzle arranges that evenly drop is covered with chain mat machine; Three sections of two sections of said coolings, cooling be for adopting spray refrigerative cooling section, cools off one section the high temperature dri is cooled to below 500 ℃.
Said chain mat machine head is provided with slag bath, when chain mat machine bottom powder gathers materials seriously, then wash tub pipe is opened, with powder towards handling to slag bath.
Chain mat machine is two, when transhipment, material and water coolant is mixed, and localized hyperthermia can not occur.At article one chain mat machine head slag bath is set, the other water pipe that is provided with of chain mat machine when the chain mat machine bottom has powder to gather, dashes powder to slag bath through water pipe, guarantees the smooth and easy operation of chain mat machine.
Beneficial effect: compared with prior art, a kind of dri refrigerating unit of the present invention has the following advantages:
1, chain mat machine has two, when transhipment, reduced iron and water is stirred mutually, mixes more even;
2, adopt spray cooling in high temperature section, this moment, cooling intensity was low, can not produce extremely cold and caused the pelletizing efflorescence; And, adopting the spray cooling in the pelletizing low-temperature zone, cooling intensity is high;
3, water directly contacts with pelletizing, and water loss is significantly less than cooling cylinder, and chain mat machine speed control by frequency variation and cooling water inflow accurate and adjustable, can the water cut of pelletizing be controlled at below 3%;
4, pelletizing does not have relative operation at carrier bar, has avoided colliding between the pelletizing and has caused efflorescence.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done explanation further.
As shown in Figure 1; Dri refrigerating unit of the present invention; Comprise high temperature chain mat machine 3, according to one section 4 of the cooling of throughput direction setting, two section 5 of cooling with cool off three section 7, cool off one section 4, two section 5 of cooling and cools off and three section 7 flow is set and takes into account valve, high temperature chain mat machine 3 disposes infrared thermometers.
Wherein, Cool off one section 4 for adopting the cooling section of spray cooling, cool off three section 7 of two section 6, cooling and spray the refrigerative cooling section, cool off one section 4 the high temperature dri is cooled to 1000 ℃-500 ℃ for adopting; Cooling off two section 5 is 500 ℃-300 ℃, and cooling off three section 7 is 300 ℃-150 ℃.Chain mat machine 3 heads are provided with slag bath, and chain mat machine 3 has two, when transhipment, reduced iron and water are stirred mutually, mix more even.
Dri refrigerating unit of the present invention in use, dri 1 is discharged on the chain mat machine 3 from discharging chute 2, chain mat machine 3 speed control by frequency variations; Can adjust according to pelletizing cooling situation; Realize the accurate control of process of cooling, dri 1 is static relatively on chain mat machine 3, does not have to interact.Initial each cooling section water yield standard-sized sheet, the temperature of observing first infrared thermometer 6 and second infrared thermometer, 8 places is when first infrared thermometer, 6 detected temperatures are lower than 100 ℃; Regulate two section 5 valve water yield of cooling; Reduce two section 5 water yield of cooling, until going out chain, the finished product temperature is about 150 ℃; When first infrared thermometer, 6 detected temperatures are lower than 150 ℃ greater than 100 ℃, will cool off three section 7 valve closes; When first infrared thermometer, 6 detected temperatures are higher than 350 ℃, then reduce chain mat machine 3 speed, reduce the material loading amount simultaneously, be lower than till 350 ℃ until first infrared thermometer 6.When second infrared thermometer, 8 temperature are lower than 60 ℃, regulate three section 7 water regulating valve of cooling, reduce the water yield, be about 100 ℃ until second infrared thermometer, 8 detected temperatures.When observing chain mat machine 3 bottom accumulated slags when serious, open washpipe 9 valves, broken ball, thin slag are flushed in the slag bath 10 and clear up.
The above only is a preferred implementation of the present invention; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (4)
1. dri refrigerating unit; It is characterized in that: the cooling that comprise high temperature chain mat machine (3), is provided with according to throughput direction one section (4), cooling two sections (5) with cool off three sections (7); Said cooling one section (4), cooling two sections (5) are provided with flow with cooling three sections (7) and take into account valve, and said high temperature chain mat machine (3) disposes infrared thermometer.
2. dri refrigerating unit according to claim 1; It is characterized in that: said cooling one section (4) is for adopting the cooling section of spray cooling; Said cooling two sections (6), coolings three sections (7) spray the refrigerative cooling section for adopting, and cool off one section (4) the high temperature dri is cooled to below 500 ℃.
3. dri refrigerating unit according to claim 1 is characterized in that: said chain mat machine (3) head is provided with slag bath.
4. dri refrigerating unit according to claim 1 is characterized in that: said chain mat machine (3) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059641.5A CN102586532B (en) | 2012-03-08 | 2012-03-08 | Direct reduction iron cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059641.5A CN102586532B (en) | 2012-03-08 | 2012-03-08 | Direct reduction iron cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102586532A true CN102586532A (en) | 2012-07-18 |
| CN102586532B CN102586532B (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210059641.5A Expired - Fee Related CN102586532B (en) | 2012-03-08 | 2012-03-08 | Direct reduction iron cooling device |
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| Country | Link |
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| CN (1) | CN102586532B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087843A (en) * | 2015-08-24 | 2015-11-25 | 江苏省冶金设计院有限公司 | Device for cooling high-temperature direct reduced iron |
| CN105907911A (en) * | 2016-06-15 | 2016-08-31 | 江苏省冶金设计院有限公司 | Hot water quenching device and method for direct-reduced iron (DRI) of rotary hearth furnace |
| CN106834665A (en) * | 2017-02-28 | 2017-06-13 | 江苏省冶金设计院有限公司 | The system and method for processing paigeite |
| CN114875193A (en) * | 2022-02-28 | 2022-08-09 | 中冶华天工程技术有限公司 | Novel cooling and screening device and method for direct reduced iron |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001025494A1 (en) * | 1999-10-01 | 2001-04-12 | Svedala Industries, Inc. | Rotary cooler for iron carbide production |
| CN201321481Y (en) * | 2008-12-22 | 2009-10-07 | 莱芜钢铁集团有限公司 | Novel pellet cooling device |
| CN101787435A (en) * | 2010-01-19 | 2010-07-28 | 武汉理工大学 | Efficient spray rotation drum type cooling machine for reduced iron |
| CN201779673U (en) * | 2010-08-20 | 2011-03-30 | 镇江华东电力设备制造厂 | Auxiliary cooling system for dry-type slag removal of boiler |
| CN201942723U (en) * | 2010-12-21 | 2011-08-24 | 钢铁研究总院 | Cylindrical cooling machine |
-
2012
- 2012-03-08 CN CN201210059641.5A patent/CN102586532B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001025494A1 (en) * | 1999-10-01 | 2001-04-12 | Svedala Industries, Inc. | Rotary cooler for iron carbide production |
| CN201321481Y (en) * | 2008-12-22 | 2009-10-07 | 莱芜钢铁集团有限公司 | Novel pellet cooling device |
| CN101787435A (en) * | 2010-01-19 | 2010-07-28 | 武汉理工大学 | Efficient spray rotation drum type cooling machine for reduced iron |
| CN201779673U (en) * | 2010-08-20 | 2011-03-30 | 镇江华东电力设备制造厂 | Auxiliary cooling system for dry-type slag removal of boiler |
| CN201942723U (en) * | 2010-12-21 | 2011-08-24 | 钢铁研究总院 | Cylindrical cooling machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087843A (en) * | 2015-08-24 | 2015-11-25 | 江苏省冶金设计院有限公司 | Device for cooling high-temperature direct reduced iron |
| CN105907911A (en) * | 2016-06-15 | 2016-08-31 | 江苏省冶金设计院有限公司 | Hot water quenching device and method for direct-reduced iron (DRI) of rotary hearth furnace |
| CN105907911B (en) * | 2016-06-15 | 2018-07-03 | 江苏省冶金设计院有限公司 | A kind of direct reduced iron by rotary hearth furnace hot water quenching device and method |
| CN106834665A (en) * | 2017-02-28 | 2017-06-13 | 江苏省冶金设计院有限公司 | The system and method for processing paigeite |
| CN114875193A (en) * | 2022-02-28 | 2022-08-09 | 中冶华天工程技术有限公司 | Novel cooling and screening device and method for direct reduced iron |
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| Publication number | Publication date |
|---|---|
| CN102586532B (en) | 2014-06-25 |
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Granted publication date: 20140625 Termination date: 20190308 |