CN101008555A - Device capable of protecting rotary kiln and ring cold machine and implementing micro-negative pressure operation of rotary kiln - Google Patents
Device capable of protecting rotary kiln and ring cold machine and implementing micro-negative pressure operation of rotary kiln Download PDFInfo
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- CN101008555A CN101008555A CN 200710051325 CN200710051325A CN101008555A CN 101008555 A CN101008555 A CN 101008555A CN 200710051325 CN200710051325 CN 200710051325 CN 200710051325 A CN200710051325 A CN 200710051325A CN 101008555 A CN101008555 A CN 101008555A
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Abstract
A device for protecting the rotary furnace and cooling machine and realizing the micro passive operation used in mineral production comprises a thrust valve at the top of sealing frame; the cylinder of thrust valve is welded with the sealing frame; the cylinder has a valve cover whose open end is connected to a weight; the steel wire under the weight coils the steel wire roller driven by the motor and reducer; when the temperature of furnace head is over high and the positive pressure is too high, the valve cover will be opened, to discharge the hot airflow and the powder in the frame instantly, and when the temperature and pressure are normal, the valve cover will be closed to confirm the micro passive pressure state. The invention can prolong the service life of rotary furnace and cooling machine.
Description
Technical field
The present invention relates to a kind of device that is applied in the mineral production.
Background technology
The roasting process of pellet is actually the high temperature cooling, and the process of heat absorption back heat release earlier mostly needed through super-dry, preheating, roasting, soaking and five stages of cooling.Its operation is as follows: the fine grinding fine iron breeze is through dehydration, after the operation such as profit mill etc. with the binding agent accurate dosing, even mixed material is under the balling equipment mechanical force, rolled, rotate, stir, rub, rub with the hands, the extruding of kneading produces the green-ball with certain intensity and granularity, the size fractionated green-ball is through belt, the shuttle-type material distributing machine, after devices such as screening system sort, granularity and intensity meet the requirements of green-ball and are evenly distributed to the grate bed by the slide flitch, thick bed of material green-ball is under driving wheel of chain grate drives, through forced air drying, the exhausting drying, warm-up phase, temperature progressively rise to 950-1050 ℃.In temperature-rise period progressively, the mechanical water of green-ball inherence, the crystallization water, intermediary water, chemical water are deviate from successively, promptly form the dry bulb with certain intensity to the drying grate end.Dry bulb tumbles into rotary kiln through the shovel flitch along the slide hopper again, because the rotary kiln end position is higher than the position of kiln tail, in the rotary kiln rotary course, physics, chemical change take place for pelletizing high-temperature roasting in kiln, friction bump.The pelletizing that moves to kiln hood enters the central cooler hopper through the kiln hood static grizzly, after central cooler starts, pelletizing in the hopper is paved under the effect of flat material mound, and after the cold wind of each section blower fan is advertised cooling piecemeal, the high-temperature part thermal current enters kiln hood seal closure compensation thermal source through one cold section backheat airduct of central cooler, and low temperature part thermal current enters in the drying grate petticoat pipe and fully utilized.
By above-mentioned technology, there is following problem:
1, because the pellet large-scale industrial production adopts thick bed of material maneuver, the thick bed of material causes the raw material ball intensity of grate bed bottom low, through forced air drying, exhausting drying, behind the warm-up phase, the relatively poor part green-ball of gas permeability can produce explosion, make the pellet that moves to kiln hood discharge the heat energy instability, temperature of kiln head and pressure fluctuate greatly, can not reach the micro-negative pressure operation of rotary kiln duty, malleation more likely makes refractory material avalanche in the kiln for a long time, kiln hood reducing part cylindrical shell dilatancy directly causes stopping production;
2, as screening system fault fracture, be the drying grate under the protection condition of high temperature, the common method that adopts rapid minimizing injecting coal quantity, forces to convert cold wind and the running of drying grate interruption, the while is slowly reduced the rotating speed of rotary kiln according to the concrete condition of kiln temperature distribution.At this moment, because each section of drying grate air quantity and Temperature Distribution is inhomogeneous, unreasonable, cause dry bulb intensity quality to descend.After the screening system trouble shooting is got rid of, the raising of dry bulb batch intensity quality needs long period, can occur dry bulb powder and broken ball during this period inevitably, after the pellet of sneaking into broken ball and powder enters central cooler, relatively poor because of gas permeability, must strengthen the blow rate required of external blower fan.And air quantity is excessive, and the powder that will cause central cooler to be blown into rotary kiln increases, and has reduced amount of oxygen in the rotary kiln, has influenced the lifting of kiln temperature and the roasting quality of the interior pelletizing of kiln;
3, break down as finished ball nodulizing induction system, central cooler is forced to shut down, in order to prevent rotary kiln because of the collapse generation of waist accident of the kiln body bending that stops kiln under the condition of high temperature suddenly and produce, according to the concrete condition that kiln temperature distributes, the rotating speed of rotary kiln is slowly reduced.Prolongation along with run down time, high temperature pellet in the central cooler hopper is cumulative, consequent heat energy increases thereupon, not only have a strong impact on the safe operation of central cooler itself, even may be out of shape by initial ring cold machine trolley axle sleeve heated bending, lubricated operating mode worsens in the axle sleeve, and axle sleeve is stuck, the serious accident that chassis can not overturn and reset.Simultaneously, one cold section air blast of central cooler blows through the thick bed of material and also becomes difficult, and rotary kiln end malleation value is bigger than normal, can't realize micro-negative pressure operation of rotary kiln.
Summary of the invention
The objective of the invention is at above-mentioned present situation, aim to provide and a kind ofly can guarantee rotary kiln, central cooler safe operation, guarantee that rotary kiln is in the micro-negative pressure operation state, can effectively control the device of central cooler hopper pellet cooling situation.
The implementation of the object of the invention is; a kind of protection rotary kiln, central cooler; realize the device of micro-negative pressure operation of rotary kiln; establish one at rotary kiln end seal closure top and diffuse valve; the cylindrical shell 8 that diffuses valve is welded together with kiln hood seal closure 9, and cylindrical shell is provided with openable valve gap 7, and valve gap 7 opening ends connect a counterweight 5 by steel wire rope; steel wire rope is walked around fixed pulley 6, the wire rope drum 3 that the steel wire rope under the counterweight is walked around fixed pulley 4 and driven by motor 1, reductor 2.
The present invention establishes one at rotary kiln end seal closure top and diffuses valve; when the rotary kiln end temperature; pressure fluctuates greatly; malleation is excessive; in the time of can not reaching the micro-negative pressure operation of rotary kiln duty; open valve gap 7; with the thermal current in the kiln hood seal closure; the pelletizing explosion; the instantaneous discharging of fricative powder part; guarantee that rotary kiln is in the micro-negative pressure operation state; guarantee rotary kiln; central cooler hopper pellet cooling situation can be effectively controlled in the central cooler safe operation, reduces rotary kiln and central cooler maintenance number of times; prolong rotary kiln; central cooler service life; reduce the labour intensity of service worker, reduce production costs, guarantee output and quality that pellet is produced.
Description of drawings
Accompanying drawing is a structural representation of the present invention
The specific embodiment
With reference to accompanying drawing, the present invention establishes one at rotary kiln end seal closure top and diffuses valve, the cylindrical shell 8 that diffuses valve is welded together with kiln hood seal closure 9, cylindrical shell is provided with openable valve gap 7, valve gap 7 opening ends connect a counterweight 5 by steel wire rope, steel wire rope is walked around fixed pulley 6, the wire rope drum 3 that the steel wire rope under the counterweight is walked around fixed pulley 4 and driven by motor 1, reductor 2.Anchoring hook spraying high-temperature refractory in cylindrical shell 8, the valve gap 7 can be high temperature resistant.
When rotary kiln end temperature, pressure fluctuate greatly, malleation is excessive, in the time of can not reaching the micro-negative pressure operation of rotary kiln duty; open motor 1; motor via reducer 2 drives wire rope drum 3 rotations, and counterweight 5 moves down, and valve gap 7 is opened; the powder momentary partial that thermal current in the kiln hood seal closure, pelletizing explosion friction produce is discharged; temperature and pressure in kiln hood recovers just often, disable motor, and valve gap 7 is under the gravity effect; close voluntarily, guarantee that rotary kiln is in the micro-negative pressure operation state.
The present invention is in molten condition at pellet-roasting because of the long-time localized hyperthermia of rotary kiln, release heat energy instability, bring temperature of kiln head, malleation value to fluctuate greatly, when entering the pellet gas permeability variation of central cooler, open in good time, a part of thermal current and powder momentary partial can be diffused, drive the decline of temperature of kiln head, the kiln hood force value is along with decline, when temperature of kiln head and pressure reach desirable value, disable motor, valve gap 7 is closed under the gravity effect voluntarily, makes rotary kiln be in the micro-negative pressure operation state.
The present invention is broken down at screening system, maintenance is finished, the rotary kiln temperature rise period, open, a dry bulb powder part that is blown into rotary kiln by central cooler will be directly through the present invention's discharging in good time, has reduced the powder that central cooler is blown into rotary kiln, improved calcination atmosphere in the kiln, shorten the rotary kiln temperature rise time, reduced the generation of substandard products pellets, guaranteed output and quality that pellet is produced.Temperature and pressure in kiln hood recovers just often, disable motor, and valve gap 7 is closed under the gravity effect voluntarily.
The present invention is broken down in finished ball nodulizing induction system, when central cooler shuts down, opens in good time, then can be under central cooler cold wind be advertised effect, with instantaneous the diffusing of a part of thermal current of the high charge level pellet in the hopper, drive the decline of temperature of kiln head, the kiln hood force value is along with decline, thereby reach temperature required and pressure, temperature and pressure in kiln hood recovers just often, disable motor, and valve gap 7 is under the gravity effect, close voluntarily, make rotary kiln be in the micro-negative pressure operation state.
Claims (2)
1, a kind of protection rotary kiln, central cooler; realize the device of micro-negative pressure operation of rotary kiln; it is characterized in that establishing one at rotary kiln end seal closure top diffuses valve; the cylindrical shell (8) that diffuses valve is welded together with kiln hood seal closure (9); cylindrical shell is provided with openable valve gap (7); valve gap (7) opening end connects a counterweight (5) by steel wire rope, and steel wire rope is walked around fixed pulley (6), the wire rope drum (3) that the steel wire rope under the counterweight is walked around fixed pulley (4) and driven by motor (1), reductor (2).
2, a kind of protection rotary kiln according to claim 1, central cooler, the device of realization micro-negative pressure operation of rotary kiln is characterized in that cylindrical shell (8), the interior anchoring hook spraying of valve gap (7) high-temperature refractory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100513252A CN100451515C (en) | 2007-01-22 | 2007-01-22 | Device capable of protecting rotary kiln and ring cold machine and implementing micro-negative pressure operation of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100513252A CN100451515C (en) | 2007-01-22 | 2007-01-22 | Device capable of protecting rotary kiln and ring cold machine and implementing micro-negative pressure operation of rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101008555A true CN101008555A (en) | 2007-08-01 |
| CN100451515C CN100451515C (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100513252A Expired - Fee Related CN100451515C (en) | 2007-01-22 | 2007-01-22 | Device capable of protecting rotary kiln and ring cold machine and implementing micro-negative pressure operation of rotary kiln |
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| Country | Link |
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| CN (1) | CN100451515C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245195A (en) * | 2013-04-28 | 2013-08-14 | 许静 | Plough type dry-ball turner |
| CN110564949A (en) * | 2019-10-22 | 2019-12-13 | 山西太钢不锈钢股份有限公司 | Method for reducing powder content of alkaline pellet |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839634B (en) * | 2010-05-09 | 2011-12-07 | 中国铝业股份有限公司 | Method for detecting temperature and negative pressure of dust falling chamber of carbon rotary kiln |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2585800A (en) * | 1947-09-03 | 1952-02-12 | Republic Steel Corp | Bleeder and equalizer for blast furnaces |
| CN2142841Y (en) * | 1991-09-30 | 1993-09-29 | 冶金工业部武汉钢铁设计研究院 | Over-pressure self-opening type discharging valve for top of blast furnace |
| CN2219304Y (en) * | 1994-12-15 | 1996-02-07 | 冶金工业部重庆钢铁设计研究院 | Gas escape valve for top of blast furnace |
| CN2572152Y (en) * | 2002-08-06 | 2003-09-10 | 武汉钢铁设计研究总院 | Compact type releasing valve |
| CN2630774Y (en) * | 2003-06-05 | 2004-08-04 | 唐山钢铁股份有限公司 | Mixing bunker gate control device for sintering machine |
| CN2632610Y (en) * | 2003-06-05 | 2004-08-11 | 唐山钢铁股份有限公司 | Double feed gate of sintering machine |
| JP2006124508A (en) * | 2004-10-28 | 2006-05-18 | Jfe Steel Kk | Releae valve for coke oven |
| CN2745932Y (en) * | 2004-11-11 | 2005-12-14 | 江苏神通阀门有限公司 | Furnace top diffuse valve |
| CN201000273Y (en) * | 2007-01-22 | 2008-01-02 | 刘勇 | Device for protecting rotary kiln and circulating cold machine, and realizing rotary kiln micro-negative-pressure operation |
-
2007
- 2007-01-22 CN CNB2007100513252A patent/CN100451515C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245195A (en) * | 2013-04-28 | 2013-08-14 | 许静 | Plough type dry-ball turner |
| CN103245195B (en) * | 2013-04-28 | 2015-01-14 | 许静 | Plough type dry-ball turner |
| CN110564949A (en) * | 2019-10-22 | 2019-12-13 | 山西太钢不锈钢股份有限公司 | Method for reducing powder content of alkaline pellet |
| CN110564949B (en) * | 2019-10-22 | 2021-02-19 | 山西太钢不锈钢股份有限公司 | Method for reducing powder content of alkaline pellet |
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| Publication number | Publication date |
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| CN100451515C (en) | 2009-01-14 |
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