CN108384913A - A kind of efficient reduction coal base shaft furnace - Google Patents
A kind of efficient reduction coal base shaft furnace Download PDFInfo
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- CN108384913A CN108384913A CN201810326145.9A CN201810326145A CN108384913A CN 108384913 A CN108384913 A CN 108384913A CN 201810326145 A CN201810326145 A CN 201810326145A CN 108384913 A CN108384913 A CN 108384913A
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- Prior art keywords
- reduction
- shaft furnace
- coal base
- base shaft
- room
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
Abstract
The present invention relates to a kind of process units of direct reduced iron, specifically disclose a kind of efficient reduction coal base shaft furnace, the coal base shaft furnace includes feeding machanism, furnace body and discharge mechanism, the furnace body includes at least one reduction unit, and each reduction unit is formed by a reduction room and set on two combustion chambers of reduction room both sides.The present invention solves the problems such as existing coal base shaft furnace unstable product quality, high energy consumption, converter life is short, production cost is high, the size of capacity is small, can realize promotion reduction efficiency, improves production scale, increases the advantageous effects such as converter life.
Description
Technical field
The invention belongs to the process units fields of direct reduced iron, are related to a kind of coal-based direct reduction shaft furnace, specific open
A kind of efficient reduction coal base shaft furnace.
Background technology
So-called coal base shaft furnace be by miberal powder be made pelletizing or lump ore mixed according to a certain percentage with reducing agent after from furnace body
Reduction room is added in top, and pelletizing is reduced into sponge iron, the process units being discharged from bottom after cooling through muffle heating.
The Direct Reduction Technology of production sponge iron has a gas base and coal base two major classes both at home and abroad at present, gas base technology more at
It is ripe, but big complex process is invested, it is suitble to natural gas than more rich area.For lacking the ground of natural gas and rich coal resources
Area is suitble to coal base.Coal-based Direct Reduction Technologies in the prior art mainly have kiln process, rotary hearth furnace method, tunnel oven etc..This is several
Kind of technology is because the characteristics of technique itself, and there are different degrees of unstable product quality, high energy consumption, converter life is short, produces
It of high cost, the problems such as size of capacity is small, operating environment is poor, is not promoted on a large scale.
Newly occurred several coal base shaft furnace process technologies in recent years, it is entitled with Patent No. CN200620095509.X
The patent of interior external heat vertical passway reduction furnace and Patent No. CN201310056022.5, a kind of entitled coal base is directly also
For the two pieces patent of former iron shaft furnace, this two kinds small-scale coal-based direct reduction shaft furnaces, there are following technology limitations：
CN200620095509.X is that several independent reductive jars are arranged in a big combustion chamber, and reductive jar is circle
Or ellipse, temperature, which is difficult equal control, leads to tank body uneven heating unstable product quality, and each tank of tank body limited amount
Size is smaller to cause production capacity limited, therefore is unable to large-scale production.
The reduction chamber of patent CN201310056022.5 and CN200620095509.X are narrower and high absolute construction,
Structural stability is bad, and especially when material is filled with larger side-thrust along with high temperature, tank body material intensity itself declines, very
It is easy to cause that reductive jar or reduction cavity dumping, the damage phenomenon such as bulge, crack, fall brick；
The pelletizing and reducing agent of the reduction intracavitary of patent CN201310056022.5 and CN200620095509.X can only lead to
Itself heat transfer is crossed, due to being the more thermal coefficient very little in loosely-packed gap, the heating of center material is very slow, and reduction is caused not filled
Divide unstable quality, and recovery time long reduction efficiency low yield can reduce the energy consumption increase of unit product.
Invention content
In order to solve existing coal-based direct reduction there are unstable product quality, high energy consumption, converter life be short, production cost
High, the problems such as size of capacity is small, the present invention provides a kind of efficient reduction coal base shaft furnaces.
Efficient reduction coal base shaft furnace technology scheme of the present invention includes mainly：Feeding machanism, furnace body and discharge mechanism, institute
It states feeding machanism to be located at the top of furnace body, discharge mechanism is located at bottom of furnace body；The furnace body includes at least one reduction unit, each
Reduction unit includes a reduction room 3 and two combustion chambers 8, and two combustion chambers 8 are respectively placed in reduction 3 both sides of room.
In coal base shaft furnace of the present invention each reduction unit can independent operating, each reduction unit can produce according to required production
Product demand controls different temperature, meets the needs for producing multiple product simultaneously in same coal base shaft furnace, solves the prior art
A kind of defect of product can only be produced simultaneously.
Further, when the failure of some reduction unit needs repairing, other units can produce not by shadow as usual
It rings, solves in coal base shaft furnace described in the prior art, when a certain component needs repairing, entire shaft furnace is required for what is stopped production to ask
Topic.Furthermore reduction unit can need permutation and combination according to production capacity, solve the problems, such as that prior art production capacity is limited.
Preferably, at least row's heat conduction beam 5 is equipped in the reduction room 3, adjacent two rows heat conduction beam is submitted in the horizontal direction
Mistake arrangement.According to the height of reduction room and length difference, the number of rows of heat conduction beam and the two rows that columns is also different, neighbouring are corresponded to
Heat conduction beam interlaced arrangement in the horizontal direction.The heat conduction beam can quickly reach the heat of combustion chamber in reduction room material
The heart, increase heat exchange area, improve 30% or more heat exchange efficiency, while heat conduction beam up and down interlaced arrangement be conducive to material uniformly by
Heat solves the prior art and conducts heat by bulk material itself, unstable product quality production caused by the heating slowly of center material
The problem of inefficiency.The heat-conduction wall for restoring room both sides is connected into an entirety by heat conduction beam, enhances the whole steady of reduction room
It is qualitative, be conducive to furnace body longevity.
Preferably, each combustion chamber 8 is surrounded by heat-conduction wall 4 and wall with flues 9, is heat conduction close to coal base reduction shaft furnace room side
Wall 4 is wall with flues 9 far from coal base reduction shaft furnace room side.It is separated by improve using heat-conduction wall 4 between combustion chamber and reduction room and leads
The thermal efficiency, heat transfer can be reduced by being separated by between combustion chamber and using wall with flues 9 far from reduction room side, reduction heat energy loss,
Reach energy-saving and environment-friendly purpose.
Preferably, when the reduction unit quantity is more than 1, the adjacent combustion chamber 8 of two reduction units shares a face wall with flues 9.
Materials can be reduced by sharing a face wall with flues, cost-effective.8 cross section of each combustion chamber is rectangular, length-width ratio ＞ 2.
Preferably, the reduction room 3 is equipped with coal gas and collects hole 6, connects the coal gas collection conduit 7 outside furnace body；It is described
Coal gas collects hole 6 and restores the coal gas of indoor generation by collecting, and is transported to combustion chamber via coal gas collection conduit 7, for burning
Room is as fuel.The collection conduit 7 can connect multiple reduction rooms.
Preferably, the 3 upper and lower part width of reduction room is equal, or is set as up-narrow and down-wide pyramidal structure or step
Structure.The width for restoring 3 upper and lower part of room is adjustable, and upper and lower part can be designed to equal wide or up-narrow and down-wide band
There are certain taper or step, using one or more in up-narrow and down-wide taper, horn structure or terraced structure, avoids
Hanging and furnace wall swelling and cracking caused by the side-thrust that material expanded by heating generates, are conducive to the unobstructed whereabouts of material and furnace body
It is long-lived.
Preferably, the cross section of the reduction room 3 is rectangular.The rectangular section design, it is fast to be conducive to reduction room center
The reductive jar that speed heating and length are longer than described in existing patent is long, can improve production capacity, be also possible to make close to square herein
Shape, but rectangle is best.Heat-conduction wall between the reduction room and combustion chamber is set as up-narrow and down-wide structure, resistance to using high heat conduction
Material is ground, occlusion closely avoids gas leakage.
Preferably, the combustion chamber 8 is equipped with several staggered quirks 17, burner 11, at least one air nozzle 12
With flue 13.Several row of horizontal quirk bricks 10 are provided in 8 short transverse of the combustion chamber, combustion chamber, which is separated into several layers, to be mutually connected
Logical " Z " font quirk 17 makes the temperature field of combustion chamber evenly, and extends the heat-exchange time of high-temperature flue gas and heat-conduction wall, has
Stable and improve heat utilization rate conducive to product quality, stock gas is fully utilized and reduces discharge and outer for gas quantity,
It is good for the environment and reduces cost.Air nozzle is provided with conducive to control combustion chamber temperature equalization, and is conducive to fuel
Abundant burning utilize.
Burner 11 is set to combustion chamber cavity top or any position close to top, and present position pair has with burning direction
It influences, when burner 11 is located at combustion chamber top, burning direction from top to bottom, when burner 11 is located at combustion chamber lower part, burns
Direction is from the bottom to top.
It is corresponded between the burner and flue at each quirk, is respectively equipped at least one air nozzle 12, the stove of collection
The combustion gas of top coal gas and pipeline supplement according to preheating and is gone back by the way that primary combustion is not finished behind the entrance of burner 11 combustion chamber
The needing of former temperature is incorporated suitable air by air nozzle 12, achievees the purpose that the temperature control that burns step by step.
The high-temperature flue gas that the combustion gas of stock gas or the pipeline supplement of collection generates after being burnt by burner 11 is along quirk 17
It flows in " Z " font, is most discharged afterwards through flue 13.
The flue 13 is set to combustion chamber cavity lower part or any position close to lower part so that high-temperature flue gas can be smooth
Discharge, when burning from up to down, flue is in the lower part of combustion chamber, until top of the flue in combustion chamber when lower upward burning.
Preferably, several quirks are staggered in Z-shaped in the combustion chamber.
Preferably, the feeding machanism includes：Charging vehicle 1 and at least one loading hopper 2, the loading hopper 2 are set to reduction
3 top of room.Upper of furnace body be equipped with moveable charging vehicle 1, between charging vehicle and furnace body according to reduction room length every 0.8 to
3 meters can be placed equidistant with several loading hoppers 2, the mixture of the pelletizing, lump ore and the reducing agent that prepare according to a certain percentage, from charging vehicle
At the uniform velocity feed enters reduction room 3 by loading hopper.
Preferably, the equidistant arrangement above reduction room 3 of each loading hopper 2.Equidistant arrangement is conducive to material in reduction room
Interior uniform pan feeding, and be conducive to each position material and fully react.
Preferably, further include several cooling jackets 14, each 3 bottom of room that restores is respectively equipped with cooling jacket 14, and described cold
But water jacket 14 restores room bottom one week around corresponding.The high-temperature material for completing to restore is discharged after being cooled down by cooling jacket, can be cold
But to 200 DEG C or less cold discharges, it can be also cooled to " 400~800 DEG C " hot discharge, cooling capacity can design as needed.
Preferably, the discharge mechanism includes material discharging machine 15 and conveyer 16, and the material discharging machine 15 is set to the cooling water
14 bottoms are covered, the conveyer 16 is set to 15 bottom of the material discharging machine.
Material discharging machine is driven by speed regulating motor, and discharge velocity can adjust as needed, if it is the pelletizing for being easier to reduction, institute
It needs the recovery time short, discharge velocity can be tuned up, opposite speed can slow down.
If discharge is hot discharge, material discharging machine needs band water cooling plant.
If it is cold discharge, belt conveyor 16 is arranged in material discharging machine lower part, and sponge iron after reducing material output screening is filled
Bag or briquetting；If it is hot discharge, chain scraper conveyor 16 is arranged in material discharging machine lower part, and sponge iron is straight after reducing material heat outputting is sieved
Connect use.
Preferably, the reduction room 3 is 0.2 to 1 meter wide, 2 to 15 meters long, 5 to 20 meters high.Specific size can be according to design need
It adjusts.According to the reduction chamber size, a reduction room is equivalent to the charging of 2~15 existing coal base reduction shaft furnace tanks
It measures, production capacity also obtains 2~15 times of raising under identical material and heat transfer condition.
Preferably, the heat-conduction wall 4 combines carbon using silicon nitride combined silicon carbide, Silicon oxynitride bonded silicon carbide, match dragon
One or more highly heat-conductive materials in SiClx, nitrate nitroge, compound phase silicon carbide are built by laying bricks or stones.
It is heat-conduction wall 4 to restore room both sides, and silicon nitride combined silicon carbide, Silicon oxynitride bonded silicon carbide, match dragon knot can be used
The highly heat-conductive materials such as silicon carbide, nitrate nitroge, compound phase silicon carbide are closed to build by laying bricks or stones.Above-mentioned heat conduction beam 5 and heat-conduction wall 4
Material is identical.Using highly heat-conductive material, the heat of combustion chamber can quickly be reached reduction room material center by heat conduction beam, increased and changed
Hot area improves 30% or more heat exchange efficiency, while interlaced arrangement is conducive to material thermally equivalent to heat conduction beam up and down, solves existing
There is technology bulk material itself heat transfer, unstable product quality caused by the heating slowly of center material, production efficiency is low to ask
Topic.The heat-conduction wall for restoring room both sides is connected into an entirety by heat conduction beam, is enhanced the overall stability of reduction room, is conducive to stove
Body is long-lived.
Preferably, the wall with flues 9 is built by laying bricks or stones by clayey or high aluminium material.9 brick of wall with flues and quirk brick 10 are according to difference
The materials such as clay, high alumina can be used in temperature section, and it is not have to heat transfer because of between to be separated by with wall with flues between combustion chamber and combustion chamber, is used
High alumina or clay brick do wall with flues can reduce between heat transfer, be conducive to the temperature between each unit and be independent of each other and can reduce
Cost.
Description of the drawings
Fig. 1 is the overall structure diagram of coal base shaft furnace embodiment of the present invention；
Fig. 2 is coal base reduction shaft furnace room of the present invention embodiment cross-sectional view；
Fig. 3 is coal base shaft furnace combustion chamber of the present invention embodiment cross-sectional view.
Reference numeral：
1 is charging vehicle；2 be loading hopper；3 be reduction room；4 be heat-conduction wall；5 be heat conduction beam；6 collect hole for coal gas；7 be coal
Gas collection conduit；8 be combustion chamber；9 be wall with flues；10 be quirk brick；11 be burner；12 be air nozzle；13 be flue；14 be cold
But water jacket；15 be material discharging machine；16 be conveyer；17 be quirk.
Specific implementation mode
In order to make technical solution of the present invention be easier to understand, in conjunction with attached drawing by the way of specific embodiment, to this hair
Clear, complete description that bright technical solution carries out.It should be noted that the part that embodiment described herein is only the present invention is implemented
Example, and whole realization methods of non-present invention, the embodiment only have exemplary, and effect is only to carry for auditor and the public
The mode more simple and clear for understanding the content of present invention, rather than to the limitation of technical solution of the present invention.It is not departing from
Under the premise of present inventive concept, all those of ordinary skill in the art do not make creative work with regard to other thinkable implementations
Scheme and other simple replacements and various change to technical solution of the present invention, belong to protection scope of the present invention.
As shown in Figure 1-Figure 3, as the preferred embodiment of the present invention, the efficient reduction coal base shaft furnace passes through with lower section
Formula is realized：
Efficient reduction coal base shaft furnace technology scheme of the present invention includes mainly：Feeding machanism, furnace body and discharge mechanism, institute
It states feeding machanism to be located at the top of furnace body, discharge mechanism is located at bottom of furnace body；The furnace body includes two reduction units, each to restore
Unit includes a reduction room 3 and two combustion chambers 8, and two combustion chambers 8 are respectively placed in reduction 3 both sides of room.
Each reduction unit can be produced with independent operating, each reduction unit according to required production in the present embodiment coal base shaft furnace
Product demand, it is desirable that control different temperature, meet in same coal base shaft furnace while producing the needs of multiple product, solve
The prior art can only produce a kind of defect of product simultaneously.
When a reduction unit failure needs repairing, another reduction unit can produce unaffected, solution as usual
It has determined in coal base shaft furnace described in the prior art, when a certain component needs repairing, the problem of entire shaft furnace is required for stopping production.
According to production capacity needs, the present embodiment is made of two reduction units, and in other embodiments, reduction unit can root
Permutation and combination is needed according to production capacity, to solve the problems, such as that prior art production capacity is limited.
As shown in Fig. 2, in the present embodiment, 12 row's heat conduction beams 5 are equipped in the reduction room 3, adjacent two heat extractions beam is in water
Square upward interlaced arrangement.In other embodiments, can corresponding number of rows and columns be set according to the height and length of reduction room
Heat conduction beam.The heat of combustion chamber can quickly be reached reduction room material center by the heat conduction beam, increased heat exchange area, improved
30% or more heat exchange efficiency, while interlaced arrangement is conducive to material thermally equivalent to heat conduction beam up and down, solves the prior art by pine
Material itself heat transfer is dissipated, the low problem of unstable product quality production efficiency, heat conduction beam caused by the heating slowly of center material
The heat-conduction wall for restoring room both sides is connected into an entirety, enhances the overall stability of reduction room, is conducive to furnace body longevity.
As shown in Figure 1, in the present embodiment, the combustion chamber 8 is surrounded by heat-conduction wall 4 and wall with flues 9, close to reduction room side
It is wall with flues 9 far from coal base reduction shaft furnace room side for heat-conduction wall 4.Using heat-conduction wall 4 to be separated by between combustion chamber and reduction room can be with
Heat transfer efficiency is improved, heat transfer can be reduced by being separated by between combustion chamber and using wall with flues 9 far from reduction room side, reduction thermal energy
It is lost in, reaches energy-saving and environment-friendly purpose.
In the present embodiment, the adjacent combustion chamber of two reduction units 8 shares wall with flues 9.Materials can be reduced by sharing a face wall with flues,
It is cost-effective.
In the present embodiment, 3 top of reduction room is equipped with coal gas and collects hole 6 and coal gas collection conduit 7；The coal gas is received
Collect hole 6 and restore the coal gas of indoor generation by collecting, and combustion chamber is transported to via coal gas collection conduit 7, for combustion chamber conduct
Fuel.
In the present embodiment, it is wide to carry lower part for 3 top of reduction room.
In the present embodiment, the cross section of the reduction room 3 is rectangular.
As shown in figure 3, in the present embodiment, the combustion chamber 8 be equipped with 17, burners 11 of the staggered quirk of 4 rows,
Two air nozzles 12 and a flue 13.
As shown in figure 3, in the present embodiment, burner 11 is set to combustion chamber wall with flues top, flue 13 is set to combustion chamber
Wall with flues lower part is set between flue 13 and burner 11 there are two air nozzle.
Collection stock gas or pipeline supplement combustion gas be in along quirk 17 by the high-temperature flue gas generated after burner combustion
" Z " font flows, and is most discharged afterwards through flue 13.Make the temperature field of combustion chamber evenly, and extends high-temperature flue gas and heat-conduction wall
Heat-exchange time, it is stable and improve heat utilization rate to be conducive to product quality, stock gas be fully utilized reduce discharge and
It is outer for gas quantity, be good for the environment and reduce cost.
Collection stock gas and pipeline supplement combustion gas by burner 11 enter combustion chamber after primary combustion do not finish,
But according to the needs of present apparatus preheating and reduction temperature, suitable air is incorporated by air nozzle 12, reaches and burns step by step
The purpose of temperature control.
In the present embodiment, as shown in Figure 1, the feeding machanism includes：1 charging vehicle 1 and 2 loading hoppers 2, loading hopper
2 equidistant are set to restore 3 top of room, the mixture of pelletizing (or lump ore) and reducing agent for preparing according to a certain percentage, from charging vehicle
At the uniform velocity feed enters reduction room 3 by loading hopper.It in other embodiments, can be equidistant above reduction room 3 according to furnace body length
Arrange multiple loading hoppers 2.Equidistant arrangement is conducive to material in the indoor uniform pan feeding of reduction, and it is fully anti-to be conducive to each position material
It answers.
In the present embodiment, two reduction room bottoms are respectively provided with two cooling jackets 14, and cooling jacket 14 is gone back around corresponding
The quantity of cooling jacket 14 can be arranged in other embodiments in former room bottom one week according to the quantity and length of reduction room.
In the present embodiment, the discharge mechanism includes material discharging machine 15 and conveyer 16, row as a preferred technical solution,
Material machine 15 is set to 14 bottom of the cooling jacket, and the conveyer 16 is set to 15 bottom of the material discharging machine.
Material discharging machine is driven by speed regulating motor, and in the present embodiment, pan feeding is the pelletizing for being easier to reduction, and the required recovery time is short,
Discharge velocity can be tuned up.In other embodiments, discharge velocity can adjust as needed, if pan feeding is to be not easy to restore,
Speed can slow down.
In the present embodiment, belt conveyor 16 is arranged in cold material discharging machine lower part, and reducing material is exported.In other embodiment
In, if it is hot material discharging machine, then lower part setting chain scraper conveyor, reducing material is exported.
In the present embodiment, complete reduction high-temperature material cooled down by cooling jacket after be discharged, be cooled to 200 DEG C or less it is cold
Discharge, in other embodiments, cooling capacity can design as needed, can also be cooled to 400~800 DEG C of hot discharges.
Wide 0.2 meter of the reduction room 3, it is 6 meters long, it is 15 meters high.Specific size can adjust according to the design needs.According to described
Chamber size is restored, a reduction room is equivalent to the charge of 2~15 existing coal base reduction shaft furnace tanks, identical material and heat transfer item
Production capacity also obtains 2~15 times of raising under part.
The wall with flues 9 and quirk are built by laying bricks or stones using high alumina brick in the present embodiment, in other embodiments, according to
Different temperatures section demand, the wall with flues 9 can also use clay brick and heat-barrier material to build by laying bricks or stones.
In the present embodiment, the heat-conduction wall 4 is formed by silicon nitride combined silicon carbide brick masonry, in other embodiment
In, it can also be by Silicon oxynitride bonded silicon carbide and/or the imperial silicon carbide of match and/or nitrate nitroge, compound phase combination carbon
The highly heat-conductive materials such as SiClx are made.Using highly heat-conductive material, combustion chamber can be improved and restore the heat transfer efficiency between room.
Claims (15)
1. a kind of efficient reduction coal base shaft furnace, includes mainly：Feeding machanism, furnace body and discharge mechanism, the feeding machanism are located at
At the top of furnace body, discharge mechanism is located at bottom of furnace body；
The furnace body includes at least one reduction unit, and each reduction unit includes reduction room (3) and two combustion chambers
(8), two combustion chambers (8) are respectively placed in reduction room (3) both sides.
2. efficient reduction coal base shaft furnace according to claim 1, it is characterised in that：It is equipped at least in the reduction room (3)
One row's heat conduction beam (5), adjacent two rows heat conduction beams interlaced arrangement in the horizontal direction.
3. efficient reduction coal base shaft furnace according to claim 1, it is characterised in that：Each combustion chamber (8) is by heat-conduction wall
(4) it is surrounded with wall with flues (9), is heat-conduction wall (4) close to coal base reduction shaft furnace room (3) side, far from coal base reduction shaft furnace room (3) one
Side is wall with flues (9).
4. efficient reduction coal base shaft furnace according to claim 3, it is characterised in that：When the reduction unit quantity is more than 1
When, the adjacent combustion chamber of two reduction units (8) shares a face wall with flues (9), and each combustion chamber (8) cross section is rectangular, length and width
Than ＞ 2.
5. efficient reduction coal base shaft furnace according to claim 1, it is characterised in that：The reduction room (3) is received equipped with coal gas
Collect hole (6), connection coal gas collection conduit (7), the coal gas collection conduit (7) can connect multiple reduction rooms.
6. efficient reduction coal base shaft furnace according to claim 1, it is characterised in that：Reduction room (3) upper and lower part
Width is equal, or is set as one or more in up-narrow and down-wide pyramidal structure, step structure or horn structure.
7. efficient reduction coal base shaft furnace according to claim 1, it is characterised in that：The cross section of reduction room (3) is in
Rectangle, the heat-conduction wall between the reduction room and combustion chamber are set as up-narrow and down-wide structure.
8. the efficient reduction coal base shaft furnace according to any one of claim 1-7, it is characterised in that：The combustion chamber (8)
Equipped with several staggered quirks (17), burner (11), at least one air nozzle (12) and flue (13).
9. efficient reduction coal base shaft furnace according to claim 8, it is characterised in that：Several quirks are in the combustion chamber
Z-shaped is staggered.
10. the efficient reduction coal base shaft furnace according to claim 1-7, any one of 9, it is characterised in that：The feeding machine
Structure includes：Charging vehicle (1) and at least one loading hopper (2), the loading hopper (2) are set to above reduction room (3).
11. the efficient reduction coal base shaft furnace according to claim 1-7, any one of 9, it is characterised in that：Further include several
Cooling jacket (14) is respectively arranged on each reduction room (3) bottom, and the cooling jacket (14) is around corresponding reduction room bottom one
Week.
12. efficient reduction coal base shaft furnace according to claim 11, it is characterised in that：The discharge mechanism includes material discharging machine
(15) and conveyer (16), the material discharging machine (15) are set to the cooling jacket (14) bottom, and the conveyer (16) is set to institute
State material discharging machine (15) bottom.
13. the efficient reduction coal base shaft furnace according to claim 1-7,9, any one of 12, it is characterised in that：The reduction
Room (3) is 0.2 meter to 1 meter wide, 2 meters to 15 meters long, 5 meters to 20 meters high.
14. the efficient reduction coal base shaft furnace according to claim 3-7,9, any one of 12, it is characterised in that：The heat conduction
Wall (4) is using silicon nitride combined silicon carbide, Silicon oxynitride bonded silicon carbide, the imperial silicon carbide of match, nitrate nitroge, compound phase
One or more highly heat-conductive materials in silicon carbide are built by laying bricks or stones.
15. the efficient reduction coal base shaft furnace according to claim 3-7,9, any one of 12, it is characterised in that：The wall with flues
(9) it is built by laying bricks or stones by clay and/or high aluminium material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426208A (en) * | 2020-03-18 | 2020-07-17 | 武汉悟拓科技有限公司 | Vertical air draft sintering machine and sintering process |
| CN112981030A (en) * | 2021-02-23 | 2021-06-18 | 中冶南方工程技术有限公司 | Treatment furnace |
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| CN204981930U (en) * | 2015-09-01 | 2016-01-20 | 中冶南方工程技术有限公司 | It is complete coal -based from heat supply direct reduction shaft furnace |
| CN107893138A (en) * | 2017-12-21 | 2018-04-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of reduction room of external-heat coal-based direct reduction iron shaft furnace |
| CN208218893U (en) * | 2018-04-12 | 2018-12-11 | 郑州安联凯实业有限公司 | A kind of efficient reduction coal base shaft furnace |
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| CN111426208A (en) * | 2020-03-18 | 2020-07-17 | 武汉悟拓科技有限公司 | Vertical air draft sintering machine and sintering process |
| CN111426208B (en) * | 2020-03-18 | 2022-05-13 | 武汉悟拓科技有限公司 | Vertical air draft sintering machine and sintering process |
| CN112981030A (en) * | 2021-02-23 | 2021-06-18 | 中冶南方工程技术有限公司 | Treatment furnace |
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