CN1049043C - External-burning vertical baking furnace for ball mineral - Google Patents
External-burning vertical baking furnace for ball mineral Download PDFInfo
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- CN1049043C CN1049043C CN 92109089 CN92109089A CN1049043C CN 1049043 C CN1049043 C CN 1049043C CN 92109089 CN92109089 CN 92109089 CN 92109089 A CN92109089 A CN 92109089A CN 1049043 C CN1049043 C CN 1049043C
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Abstract
The present invention relates to an external-burning vertical baking furnace for ball minerals, which is used for baking ball minerals containing iron. The present invention comprises a drying bed, a hollow wall, a baking chamber, a combustion chamber, a material discharging device and a smoke gas distribution surrounding pipe. The present invention is characterized in that the drying bed is in a conical shape, and a girder and a fire grate of the drying bed are made of a special fire-resistant material or heat-resistant steel. The weight of the drying bed is supported on a furnace wall of the baking chamber and the hollow wall, and thus, water-cooled girders are cancelled. The hollow wall is in a cylindrical shape, and the weight of the hollow wall is supported on reinforced concrete supporting columns, and thus, the water-cooled girders are cancelled. The baking chamber forms a circular structure and has no dead space, and thus, the baking chamber ensures uniform gas flow distribution and baking. The combustion chamber and the smoke gas distribution surrounding pipe are in tight connection, both form circular structures and have uniform stress and no need of reinforcement, and thus, the steel is saved. The material discharging device comprises a gear roller, a material stopping valve, an upper seal valve and a lower seal valve, and has favorable sealing performance.
Description
The present invention belongs to the agglomerates of sintered pellets technical field, is a kind of novel type of furnace of roasting iron content pellet.
At present, the extensive vertical pellet-roasting furnace that adopts in the China and even the world all is rectangular.The oven dry bed is the roof shape, below by herringbone water cooled steel beam support.The firing chamber is rectangular, and the cavity wall of a rectangle is arranged at the center, firing chamber.Cavity wall is divided into the total weight of a water cooled steel beam support cavity wall.The water-cooled girder steel of supporting cavity wall is worked under the wearing and tearing of 900～1100 ℃ high temperature, high loading and pellet, and condition is very abominable.Therefore, service life is quite short, and few 3～6 months, long was just bad more than a year.Changing the water-cooled girder steel must blowing out, and seven days at least, long had half wheat harvesting period.This has not only influenced production, but also has increased maintenance cost.
In addition, the design of rectangle shaft furnace is unreasonable, has the dead angle to exist.After adding cavity wall, the dead angle of eight 90 degree is arranged.Therefore, roasting and blanking are all inhomogeneous.The 2nd, rectangle structure is stressed unreasonable, for keeping stability of structure, must reinforce.Its rolled steel dosage is bigger.
Purpose of the present invention:
The one, change furnace type structure, cancellation water-cooled girder steel prolongs the shaft furnace life-span, improves output, reduces production run expense and maintenance cost.
The 2nd, eliminate the dead angle in the firing chamber, air-flow is distributed and roasting even, raising output, product quality and cutting down the consumption of energy.
The 3rd, design stressed rational furnace type structure, cancellation is reinforced and is used steel, reduces capital expenditure and maintenance cost.
The 4th, design seals discharge device preferably, reduces the leakage of cooling air and improves work situation.
The object of the present invention is achieved like this: described external-burning vertical baking furnace for ball mineral mainly distributes bustle pipe (9) to form (seeing accompanying drawing 1,5) by taper shape oven dry bed (1), inner core (2), urceolus (3), well formula combustion chamber (4), device for discharging (5～8) and flue gas.Perhaps dry by the fire in bed (1), inner core (2), urceolus (3), ring-type cavate combustion chamber (4) and device for discharging (5,10) and form (seeing accompanying drawing 3,6) by taper shape.
The inner core (2) of a circle at first is set in the middle of burner hearth, and it is by the total weight of a pillar supporting inner core.The bottom of inner core has air admission hole, and top has steam vent.Inner core is made (seeing accompanying drawing 1,3,5,6) by wear-resisting refractory material.
The second, the firing chamber is designed to an endless belt, and it is made of inner core (2) and urceolus (3).Each horizontal cross-section of urceolus and inner core is concentric circles.Urceolus is a reducing cylinder, is built into wear-resisting refractory material, and the urceolus skin is an insulation material, and shell is that steel plate is made (seeing accompanying drawing 5,6).
The 3rd, for reducing burner quantity, be convenient to operation and control temperature, design two well formula combustion chambers (4) and flue gas for this reason and distributed bustle pipe (9).The high-temperature flue gas that produces in combustion chambers burn distributes bustle pipe (9) to enter firing chamber, endless belt (seeing accompanying drawing 1,5) by bocca through flue gas.
Also can adopt and disperse burning, n burner is set, combustion chamber (4) are a ring chamber (seeing accompanying drawing 3,6) round the firing chamber.The flue gas that produces in combustion chambers burn enters the firing chamber, endless belt by bocca.
It is common refractory that well formula combustion chamber and flue gas distribute the liner of bustle pipe, and the liner skin is an insulation material, and shell is that steel plate is made.
The 4th, oven dry bed (1) is conical, and the fire grate of the beam of oven dry bed and oven dry bed adopts special refractory or heat resisting steel to make.The weight supporting of oven dry bed is on the wall of inner core and urceolus.
The 5th, device for discharging: it forms (seeing accompanying drawing 1) in the bottom of firing chamber, endless belt by discaling roll (5), shutting off valve (6), upper sealing valve (7) and lower seal valve (8).Perhaps form (seeing accompanying drawing 3) by discaling roll (5), disc type discharger (10).
Discaling roll is a truncated cone-shaped (or cylindrical), toothed mace, by wear-resisting, heat resisting cast steel is made or use normal steel casting, the hollow water flowing is cold really.Shutting off valve is the unidirectional sector structure of opening, and upper sealing valve is a covering plate structure, and the lower seal valve is a clock watch formula structure.The disc type discharger is made up of gear wheel and annular disk, and gear wheel is fixed on below the annular disk.
The hydraulic system transmission is all adopted in the work of discaling roll, shutting off valve and upper-lower seal valve.The disc type discharger is by gear wheel, the transmission of reductor system.
The present invention has compared following advantage with former rectangle shaft furnace:
1. cancelled cavity wall water-cooled beam and oven dry bed water-cooled beam, can prolong furnace life, using water wisely improves output, reduces maintenance cost and operating cost.
2. the firing chamber, endless belt does not have the dead angle, air-flow distribute and roasting all more even, can improve product yield, quality and cut down the consumption of energy.
3. furnace type structure is reasonable in design, and is stressed even, do not need reinforcement, and can save steel, reduces investment.
4. after the cancellation cavity wall was provided with inner core, the firing chamber was the endless belt between inner/outer tube, and this endless belt changes with the inner/outer tube diameter variation, therefore can improve single stove design output arbitrarily, adapted to large-scale iron and steel enterprise and used.
5. the device for discharging sealing is better, can improve work situation.
Accompanying drawing:
Accompanying drawing 1 external-burning vertical baking furnace for ball mineral longitudinal section (concentrated combustion)
Accompanying drawing 2 external-burning vertical baking furnace for ball mineral vertical views (concentrated combustion)
Accompanying drawing 3 external-burning vertical baking furnace for ball mineral longitudinal sections (disperseing burning)
Accompanying drawing 4 external-burning vertical baking furnace for ball mineral vertical views (disperseing burning)
The I-I section of accompanying drawing 5 accompanying drawings 1
The II-II section of accompanying drawing 6 accompanying drawings 3
Embodiment of the invention accompanying drawings is as follows:
With reference to accompanying drawing 1,10～25mm iron content green-ball by the balling disk (-sc) manufacturing, after the screening of circle roll screen, deliver to the shaft furnace top by belt feeder, fall into the chute of revolving top, be arranged in equably on the conical oven dry bed (1), the hot gas oven dry that green-ball on the oven dry bed is risen is on the one hand rolled downwards along the slope because of deadweight simultaneously, enters the firing chamber, endless belt.1050～1150 ℃ the high-temperature flue gas that produces in well formula (or ring-type cavate) combustion chamber (4) flows into flue gas and distributes bustle pipe (9), enters the firing chamber, endless belt through bocca.Under the high temperature about 1250 ℃, green-ball carries out the series of physical chemical change and by the ripe ball of roasting.Ripe ball continues to descend under the effect of deadweight to enter insulation, cooling zone.Through bulk crushing that cooled ripe ball will be bondd in roasting process by discaling roll (5) and enter in the hopper above the shutting off valve (6).Instantly seal valve (8) is closed, upper sealing valve (7) is when opening, can open shutting off valve (6), ripe ball is put into hopper between lower seal valve and the upper sealing valve, when the weight of hopper rose to setting, shutting off valve (6) was closed, and closed upper sealing valve (7) after stopping blanking, and then open lower seal valve (8), ripe ball is discharged.
Cold true wind is produced by centrifugal blower, is transported to the shaft furnace bottom through pipeline, blasts the cooling zone of shaft furnace from the shaft furnace bottom.When ripe ball was cooled, cold wind was heated, and rose to the bottom of inner core, and the air admission hole through the inner core bottom enters inner core, entered the oven dry bed down by upper discharge hole, discharged through the gap and the gap between the green-ball of fire grate, and entered flue gas cover.Meanwhile, green-ball is heated oven dry.Enter the flue gas of flue gas cover, after cyclone dust removal, blast chimney and discharge by air exhauster.
Claims (6)
1. the external-burning vertical baking furnace for ball mineral of a roasting iron content pellet, it distributes bustle pipe (9) to be formed by taper shape oven dry bed (1), inner core (2), urceolus (3), well formula (or ring-type cavate) combustion chamber (4), device for discharging (5,6,7,8) and flue gas, it is characterized in that this vertical pellet-roasting furnace is provided with the inner core of a circle at the center.
2. external-burning vertical baking furnace for ball mineral according to claim 1 is characterized in that inner core (2) is columnar, and it is by the total weight of a pillar supporting cylindrical shape inner core.
3. external-burning vertical baking furnace for ball mineral according to claim 1 is characterized in that the firing chamber is an endless belt, is made of inner core (2) and urceolus (3).
4. external-burning vertical baking furnace for ball mineral according to claim 1 is characterized in that: adopt two well formula combustion chambers (4) and flue gas to distribute bustle pipe (9) to join.
5. external-burning vertical baking furnace for ball mineral according to claim 1 is characterized in that, furnace roof green-ball oven dry bed (1) is a taper shape, and its beam is supported on the wall of urceolus and inner core.
6. external-burning vertical baking furnace for ball mineral according to claim 1 is characterized in that device for discharging is formed a whole jointly by discaling roll (5), shutting off valve (6), upper sealing valve (7) and lower seal valve (8), plays sealing and discharge effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109089 CN1049043C (en) | 1992-07-31 | 1992-07-31 | External-burning vertical baking furnace for ball mineral |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92109089 CN1049043C (en) | 1992-07-31 | 1992-07-31 | External-burning vertical baking furnace for ball mineral |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069567A CN1069567A (en) | 1993-03-03 |
| CN1049043C true CN1049043C (en) | 2000-02-02 |
Family
ID=4943960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92109089 Expired - Fee Related CN1049043C (en) | 1992-07-31 | 1992-07-31 | External-burning vertical baking furnace for ball mineral |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049043C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460531C (en) * | 2004-06-10 | 2009-02-11 | 济南钢铁股份有限公司 | Stoving method and apparatus for producing pellet |
| CN100397018C (en) * | 2005-12-23 | 2008-06-25 | 济南济钢设计院 | Pelletizing shaft furnace with smooth descent and diversion functions |
| CN108061461A (en) * | 2017-12-12 | 2018-05-22 | 中国科学院过程工程研究所 | A kind of high-temp chlorination shaft furnace |
-
1992
- 1992-07-31 CN CN 92109089 patent/CN1049043C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1069567A (en) | 1993-03-03 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |