CN106755689A - A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron - Google Patents
A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron Download PDFInfo
- Publication number
- CN106755689A CN106755689A CN201611159413.XA CN201611159413A CN106755689A CN 106755689 A CN106755689 A CN 106755689A CN 201611159413 A CN201611159413 A CN 201611159413A CN 106755689 A CN106755689 A CN 106755689A
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- China
- Prior art keywords
- gas
- sponge iron
- cold bound
- bound pellet
- support flitch
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses gas-based shaft kiln and its method that a kind of cold bound pellet prepares sponge iron.Wherein method includes：1) prepare cold bound pellet and cold bound pellet is added in dryer section；2) first gas are dried in dryer section to the cold bound pellet for adding, and obtain dried cold bound pellet；3) dried cold bound pellet alternately falls along left support flitch and right support flitch, while being preheated by second gas；4) cold bound pellet after preheating alternately falls along left support flitch and right support flitch, while there is reduction reaction with reducing gas, generates sponge iron；5) make sponge iron be exported through sponge iron to discharge.Equipment needed for cold bound pellet is dried, is calcined and cooled down is saved using gas-based shaft kiln of the invention and method, the introducing of left support flitch and right support flitch promotes also Primordial Qi to be moved upwards along " it " word path, has greatly improved drying, preheating and the reduction effect of cold bound pellet.
Description
Technical field
The present invention relates to metallurgical technology field, specifically, the gas the present invention relates to prepare sponge iron by cold bound pellet
Base shaft furnace and its method.
Background technology
It is raw material that gas-based shaft kiln prepares sponge iron and uses acid pellet or agglomerates, generally requires to pass through cold bound pellet
Crossing after drying, be calcined and cooling down to enter in gas-based shaft kiln.Green-ball drying process is carried out in drying grate, and roasting is often being returned
Carried out in rotary kiln, be cooled in being carried out on central cooler.Gas-based shaft kiln prepares raw material that sponge iron used under room temperature or low temperature
Acid pellet, drying, roasting and cooling procedure that this is related to cold bound pellet, long flow path, equipment is complicated, causes substantial amounts of
Energy dissipation.
In recent years, patent report is fed directly to gas-based shaft kiln production sponge iron using cold bound pellet, can be great
Shorten technological process, reduce energy dissipation.However, because cold bound pellet compression strength is low, easy crushing and perpendicular in gas base
Directly use operability not strong in stove, therefore sponge iron is prepared in gas-based shaft kiln using cold bound pellet and still need to more realities
Trample and explore.
The compression strength that the cold bound pellet of different temperatures band and position can bear in gas-based shaft kiln is different.It is existing
Gas-based shaft kiln is vertical heater, and pelletizing bears pressure and the frictional force brought from body and surrounding pelletizing in stove, and shaft furnace is higher,
What pelletizing was born in stove is bigger from the pressure and frictional force in vertical range.
The content of the invention
The problem of sponge iron presence is prepared for above-mentioned gas-based shaft kiln, the present invention proposes that one kind is prepared using cold bound pellet
The gas-based shaft kiln and its method of sponge iron.
According to an aspect of the present invention, the present invention provides the gas-based shaft kiln that a kind of cold bound pellet prepares sponge iron, the gas
Base shaft furnace includes：
Body of heater, it vertically extends, and furnace interior is provided with cavity, and cavity is divided into dryer section, preheating section from top to bottom
And reduction section, and the relative side wall of cavity has been arranged alternately multipair inclined left support flitch and right support material from top to bottom
Plate, each left support flitch and right support flitch towards on the direction of the vertical center line of cavity it is downward-sloping extend to it is described
Vertical center line；
Cold bound pellet entrance, it is located at body of heater upper end；
Top gas is exported, its dryer section for being located at the body of heater；
Also Primordial Qi entrance, it is located at reduction section；And
Sponge iron is exported, and it is located at reduction section bottom.
According to one embodiment of present invention, wherein top gas outlet positioned at body of heater dryer section side top and also
Primordial Qi entrance is located at the bottom of the side of reduction section.
According to one embodiment of present invention, left support flitch and right support flitch and the angle of horizontal plane are 5 °~30 °,
And the angle is preferably 10 °~20 °.
According to another aspect of the present invention, the present invention also provides one kind and prepares sponge by cold bound pellet using gas-based shaft kiln
The method of iron, the method comprises the following steps：
1) prepare cold bound pellet and the cold bound pellet is added to gas-based shaft kiln by cold bound pellet entrance and dry
In section；
2) preheated section of first gas from bottom to top in dryer section to step 1) in add cold bound pellet do
It is dry, obtain dried cold bound pellet；
3) dried cold bound pellet alternately falls in preheating section along left support flitch and right support flitch, while quilt
Second gas preheating from reduction section, cold bound pellet and first gas after being preheated；
4) cold bound pellet after preheating alternately falls in reduction section along left support flitch and right support flitch, while with
There is reduction reaction through the reducing gas that also Primordial Qi entrance is passed through, generate sponge iron and second gas；
5) make step 4) in generation sponge iron through gas-based shaft kiln bottom sponge iron export discharge.
According to one embodiment of present invention, step 1) in the biodiversity content of prepared cold bound pellet be not more than
10%.
According to one embodiment of present invention, step 1) in prepare cold bound pellet mode include disk pelletizing, to roller
Pressure ball or compacting balling-up mode in one or more.
According to one embodiment of present invention, step 4) in also Primordial Qi temperature be 850 DEG C~950 DEG C.
According to one embodiment of present invention, step 4) in reduction gas bag contain H2And CO, and H2With total volume hundred of CO
Divide than being not less than 80%.
According to one embodiment of present invention, step 4) in reduction after sponge iron temperature be 400 DEG C~600 DEG C.
Gas-based shaft kiln and divided gas-based shaft kiln device by the method that cold bound pellet prepares sponge iron that the present invention is used
It is dryer section, preheating section and the part of reduction section three, particularly reduction section inside is provided with left support flitch and right support flitch, subtracts
Lack the frictional force from the pressure in vertical range and from pelletizing around that bottom cold bound pellet is born, reduce ball
Cooking starch rate.The introducing of left support flitch and right support flitch promotes also Primordial Qi to be moved upwards along " it " word path, greatly changes
Drying that is kind and improve cold bound pellet, preheating and reduction effect.Cold bound pellet dried, is preheated, reduced and deep reduction
Process is concentrated in gas-based shaft kiln dryer section, preheating section and reduction section and completed, and enormously simplify technological process, saves oxidation ball
Group or equipment needed for agglomerates preparation process, have saved comprehensive energy consumption, improve the degree of metalization and production efficiency of sponge iron,
The degree of metalization of sponge iron is high compared with the degree of metalization of the sponge iron that traditional handicraft is obtained.
Brief description of the drawings
Fig. 1 is the front view of the gas-based shaft kiln that cold bound pellet of the invention prepares sponge iron；
Fig. 2 is the side view of the gas-based shaft kiln that cold bound pellet of the invention prepares sponge iron；And
Fig. 3 is the schematic flow sheet of the method that use gas-based shaft kiln of the invention is prepared sponge iron by cold bound pellet.
Specific embodiment
It should be appreciated that embodiments of the invention shown in the exemplary embodiment are merely illustrative.Although in this hair
Only a small number of embodiments have been described in detail in bright, but those skilled in the art to be readily appreciated that and depart from the present invention in not essence
In the case of the teaching of theme, various modifications are feasible.Correspondingly, all such modifications should all be included in of the invention
In the range of.Without departing from the spirit of the invention, can be to the design of following exemplary embodiment, operating condition and ginseng
Number etc. makes others and replaces, changes, changes and delete.
The cold bound pellet for describing the embodiment of the present invention referring to Fig. 1 and 2 prepares the gas-based shaft kiln of sponge iron.The gas base
Shaft furnace generally includes body of heater, and it vertically extends, and furnace interior is provided with cavity, cavity be divided into from top to bottom dryer section 200,
Preheating section 300 and reduction section 400, and the relative side wall of cavity has been arranged alternately multipair inclined right support material from top to bottom
Plate 800 and left support flitch 900, each left support flitch 900 and right support flitch 800 are in the vertical center line towards cavity
The downward-sloping angle for extending to the vertical center line, left support flitch 900 and right support flitch 800 and horizontal plane on direction
It is 5 °~30 °, and the angle is preferably 10 °~20 °.Body of heater upper end is provided with cold bound pellet 100, top gas outlet 700
Positioned at the top of the side of dryer section 200 of body of heater, also Primordial Qi entrance 500 is located at the bottom of the side of reduction section 300, sponge iron outlet
600 are located at the bottom of reduction section 400.
Fig. 3 shows that use gas-based shaft kiln of the invention is prepared the schematic of the method for sponge iron by cold bound pellet
Flow chart.The method for preparing sponge iron disclosed in this invention is illustrated with reference to Fig. 1-2 and reference picture 3.
The method starts from step S100.In the step s 100, cold bound pellet is prepared and by cold bound pellet by freezing off
Balling group's entrance 100 is added in gas-based shaft kiln dryer section.The biodiversity content of prepared cold bound pellet is not more than
10%, prepare the cold bound pellet by disk pelletizing, to one or more in roll-in ball or compacting balling-up mode.
In step s 200, preheated section 300 first gas from bottom to top are added in dryer section 200 is to step S100
Cold bound pellet be dried, obtain dried cold bound pellet.
In step S300, dried cold bound pellet is in preheating section 300 alternately along left support flitch 900 and right branch
Support flitch 800 falls, while by the second gas preheating from reduction section 400, the cold bound pellet after being preheated and first
Gas.
In step S400, the cold bound pellet after preheating is in reduction section 400 alternately along left support flitch 900 and right branch
Support flitch 800 falls, while there is reduction reaction with through the also reducing gas that is passed through of Primordial Qi entrance 500, generation sponge iron and the
Two gases.Also the temperature of Primordial Qi is 850 DEG C~950 DEG C.Reduction gas bag contains H2And CO, and H2With total percent by volume of CO
Not less than 80%.Sponge iron temperature is 400 DEG C~600 DEG C after reduction.
Finally, in step S500, the sponge iron generated in step S400 is made to be exported through the sponge iron of gas-based shaft kiln bottom
600 discharges.
Embodiment one
The cold bound pellet of biodiversity content 10% is added into gas-based shaft kiln dryer section by cold bound pellet entrance 100
In 200.Preheated section 300 first gas from bottom to top are contacted in gas-based shaft kiln dryer section 200 with the cold bound pellet for adding
And cold bound pellet is dried, dry the top gas produced by cold bound pellet and discharged through top gas outlet 700.After drying
Cold bound pellet alternately fall along left support flitch 900 and right support flitch 800 in preheating section 300, while by from also
The second gas preheating of former section 400, cold bound pellet and first gas after being preheated.Cold bound pellet after preheating is also
Former section 400 alternately falls along left support flitch 900 and right support flitch 800, while going back what Primordial Qi entrance 500 was passed through with warp
There is reduction reaction in 850 DEG C of reducing gas, generate sponge iron and second gas.Reduction gas bag contains H2And CO, and H2With CO's
Total percent by volume is 81%.Sponge iron temperature is 400 DEG C after reduction, the sponge iron of generation through gas-based shaft kiln bottom sponge
Iron outlet 600 is discharged.
The degree of metalization about 83.5% of the sponge iron prepared using this method, the sponge ferrous metal prepared using traditional handicraft
Rate about 82.4%.
Embodiment two
The cold bound pellet of biodiversity content 9% is added into gas-based shaft kiln dryer section 200 by cold bound pellet entrance 100
It is interior.Preheated section 300 first gas from bottom to top are contacted and right in gas-based shaft kiln dryer section 200 with the cold bound pellet for adding
Cold bound pellet is dried, and dries the top gas produced by cold bound pellet and is discharged through top gas outlet 700.It is dried cold
Agglomerated pellet alternately falls in preheating section 300 along left support flitch 900 and right support flitch 800, while by from reduction section
400 second gas preheating, cold bound pellet and first gas after being preheated.Cold bound pellet after preheating is in reduction section
400 alternately fall along left support flitch 900 and right support flitch 800, while 900 DEG C be passed through with warp also Primordial Qi entrance 500
Reducing gas occur reduction reaction, generate sponge iron and second gas.Reduction gas bag contains H2And CO, and H2It is total with CO
Percent by volume is 85%.Sponge iron temperature is 500 DEG C after reduction, and the sponge iron of generation goes out through the sponge iron of gas-based shaft kiln bottom
Mouth 600 is discharged.
The degree of metalization about 86.3% of the sponge iron prepared using this method, the sponge ferrous metal prepared using traditional handicraft
Rate about 84.1%.
Embodiment three
The cold bound pellet of biodiversity content 8% is added into gas-based shaft kiln dryer section 200 by cold bound pellet entrance 100
It is interior.Preheated section 300 first gas from bottom to top are contacted and right in gas-based shaft kiln dryer section 200 with the cold bound pellet for adding
Cold bound pellet is dried, and dries the top gas produced by cold bound pellet and is discharged through top gas outlet 700.It is dried cold
Agglomerated pellet alternately falls in preheating section 300 along left support flitch 900 and right support flitch 800, while by from reduction section
400 second gas preheating, cold bound pellet and first gas after being preheated.Cold bound pellet after preheating is in reduction section
400 alternately fall along left support flitch 900 and right support flitch 800, while 950 DEG C be passed through with warp also Primordial Qi entrance 500
Reducing gas occur reduction reaction, generate sponge iron and second gas.Reduction gas bag contains H2And CO, and H2It is total with CO
Percent by volume is 88%.Sponge iron temperature is 600 DEG C after reduction, and the sponge iron of generation goes out through the sponge iron of gas-based shaft kiln bottom
Mouth 600 is discharged.
The degree of metalization about 88.5% of the sponge iron prepared using this method, the sponge ferrous metal prepared using traditional handicraft
Rate about 87.3%.
Presently preferred embodiments of the present invention is the foregoing is only, not for limiting practical range of the invention；If do not taken off
From the spirit and scope of the present invention, the present invention is modified or equivalent, all should covered in the claims in the present invention
In the middle of protection domain.
Claims (10)
1. a kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron, it is characterised in that the gas-based shaft kiln includes：
Body of heater, it vertically extends, and furnace interior is provided with cavity, cavity be divided into from top to bottom dryer section, preheating section and
Reduction section, and the relative side wall of cavity has been arranged alternately multipair inclined left support flitch and right support flitch from top to bottom,
Each left support flitch and right support flitch are extending to described erecting towards downward-sloping on the direction of the vertical center line of cavity
Straight center line；
Cold bound pellet entrance, it is located at body of heater upper end；
Top gas is exported, its dryer section for being located at the body of heater；
Also Primordial Qi entrance, it is located at reduction section；And
Sponge iron is exported, and it is located at reduction section bottom.
2. the gas-based shaft kiln for preparing sponge iron according to claim 1, it is characterised in that wherein：
The top of side of the top gas outlet positioned at the dryer section of the body of heater；And
The also Primordial Qi entrance is located at the bottom of the side of reduction section.
3. the gas-based shaft kiln for preparing sponge iron according to claim 1, it is characterised in that the left support flitch and right branch
Support flitch is 5 °~30 ° with the angle of horizontal plane.
4. a kind of method that gas-based shaft kiln using as described in claim any one of 1-3 prepares sponge iron, it is characterised in that institute
The method of stating comprises the following steps：
1) prepare cold bound pellet and the cold bound pellet is added in gas-based shaft kiln dryer section by cold bound pellet entrance；
2) preheated section of first gas from bottom to top in dryer section to step 1) in add cold bound pellet be dried, obtain
To dried cold bound pellet；
3) dried cold bound pellet alternately falls in preheating section along left support flitch and right support flitch, while being come from
The second gas preheating of reduction section, cold bound pellet and first gas after being preheated；
4) cold bound pellet after preheating alternately falls in reduction section along left support flitch and right support flitch, while with warp also
There is reduction reaction in the reducing gas that Primordial Qi entrance is passed through, generate sponge iron and second gas；
5) make step 4) in generation sponge iron through gas-based shaft kiln bottom sponge iron export discharge.
5. the method for preparing sponge iron according to claim 4, it is characterised in that step 1) in prepared freeze off balling
The biodiversity content of group is not more than 10%.
6. the method for preparing sponge iron according to claim 4, it is characterised in that step 1) in prepare cold bound pellet
Mode is including disk pelletizing, to one or more in roll-in ball or compacting balling-up mode.
7. the method for preparing sponge iron according to claim 4, it is characterised in that step 4) in the temperature of also Primordial Qi be
850 DEG C~950 DEG C.
8. the method for preparing sponge iron according to claim 4, it is characterised in that step 4) in reduction gas bag contain H2And CO.
9. the method for preparing sponge iron according to claim 8, it is characterised in that the H2With total volume basis of CO
Than not less than 80%.
10. the method for preparing sponge iron according to claim 4, it is characterised in that step 4) in sponge iron temperature after reduction
Spend is 400 DEG C~600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159413.XA CN106755689A (en) | 2016-12-15 | 2016-12-15 | A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159413.XA CN106755689A (en) | 2016-12-15 | 2016-12-15 | A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron |
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| Publication Number | Publication Date |
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| CN106755689A true CN106755689A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611159413.XA Pending CN106755689A (en) | 2016-12-15 | 2016-12-15 | A kind of cold bound pellet prepares the gas-based shaft kiln and its method of sponge iron |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029494A (en) * | 2022-06-21 | 2022-09-09 | 首钢集团有限公司 | Reaction tank, hydrogen reduction system and hydrogen reduction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248623A (en) * | 1978-03-11 | 1981-02-03 | Hamburger Stahlwerke Gmbh | Process for the direct reduction of iron ores |
| CN1080961A (en) * | 1992-12-23 | 1994-01-19 | 东北工学院 | The method and apparatus of reducing spongy iron in coal-base shaft furnace |
| CN1089305A (en) * | 1992-03-25 | 1994-07-13 | 唐荣昌 | Shaft reduction furnace for sponge iron |
| CN106086278A (en) * | 2016-08-05 | 2016-11-09 | 北京神雾环境能源科技集团股份有限公司 | A kind of molten point of stove reduction system and method for injecting oxygen |
| CN206385188U (en) * | 2016-12-15 | 2017-08-08 | 江苏省冶金设计院有限公司 | A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron |
-
2016
- 2016-12-15 CN CN201611159413.XA patent/CN106755689A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248623A (en) * | 1978-03-11 | 1981-02-03 | Hamburger Stahlwerke Gmbh | Process for the direct reduction of iron ores |
| CN1089305A (en) * | 1992-03-25 | 1994-07-13 | 唐荣昌 | Shaft reduction furnace for sponge iron |
| CN1080961A (en) * | 1992-12-23 | 1994-01-19 | 东北工学院 | The method and apparatus of reducing spongy iron in coal-base shaft furnace |
| CN106086278A (en) * | 2016-08-05 | 2016-11-09 | 北京神雾环境能源科技集团股份有限公司 | A kind of molten point of stove reduction system and method for injecting oxygen |
| CN206385188U (en) * | 2016-12-15 | 2017-08-08 | 江苏省冶金设计院有限公司 | A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029494A (en) * | 2022-06-21 | 2022-09-09 | 首钢集团有限公司 | Reaction tank, hydrogen reduction system and hydrogen reduction method |
| CN115029494B (en) * | 2022-06-21 | 2023-12-12 | 首钢集团有限公司 | Reaction tank, hydrogen reduction system and hydrogen reduction method |
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