CN209685837U - A kind of gas-based shaft kiln producing cold direct reduced iron - Google Patents
A kind of gas-based shaft kiln producing cold direct reduced iron Download PDFInfo
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- CN209685837U CN209685837U CN201821541786.8U CN201821541786U CN209685837U CN 209685837 U CN209685837 U CN 209685837U CN 201821541786 U CN201821541786 U CN 201821541786U CN 209685837 U CN209685837 U CN 209685837U
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Abstract
The utility model relates to a kind of gas-based shaft kilns for producing cold direct reduced iron, belong to gas base directly reducing ironmaking technology field.Gas-based shaft kiln includes: gas-based shaft kiln ontology, is followed successively by preheating section, reduction section and cooling section from top to bottom；Pelletizing material inlet is arranged at the top of preheating section；High temperature reduction gas entrance, is arranged on the outer wall of reduction section bottom；Cooling air inlet is arranged on the outer wall of cooling section bottom；Stock gas outlet, is arranged at the top of preheating section；The outlet of High-temperature cooling gas, is arranged on the outer wall at the top of cooling section；Cold direct reduced iron outlet, is arranged in gas-based shaft kiln bottom；And current equalizer, it is arranged in gas-based shaft kiln bosh.By the utility model, cooling air enters shaft furnace by shaft furnace bottom coohng gas entrance, is guided by current equalizer and exports discharge by High-temperature cooling gas, can effectively realize the cooling to pelletizing material after high temperature reduction.
Description
Technical field
The utility model belongs to gas base directly reducing ironmaking technology field, is related to a kind of gas base for producing cold direct reduced iron
Shaft furnace.
Background technique
Direct reduced iron is also known as sponge iron, is the solid metallic iron that iron ore restores under solid conditions, wherein pressing from both sides
Gangue content in miscellaneous ore.The high-quality sponge iron of high-purity has harmful element in dilution steel, reduces gas and field trash
The effect of content is the indispensable impurity diluent of electric furnace mini-mill steelmaking, while being also electric furnace smelting clean steel, high-quality steel
The indispensable impurity diluent of equal special steels and ferriferous raw material and the best coolant of pneumatic steelmaking, carry can material and iron
Source.Direct reduction iron making technique can be divided into gas base and coal base according to the difference of reducing agent, and wherein gas base directly reducing technology produces
Direct reduced iron account for the 80% of whole world direct reduced iron yield.
In gas-based shaft kiln, pelletizing material passes through shaft furnace preheating section and reduction section during shaft furnace lands, with Xiang Shangliu
Dynamic reducing gas reacts；The pelletizing material being reduced is anti-in the carburetted gas/cooling air for restoring pars infrasegmentalis with flowing up
It answers, carries out cooling or carburization reaction, and then generate cold heat direct reduced iron.
In the prior art, gas-based shaft kiln prepares cold direct reduced iron process and has the following problems: (1) reduction reaction needs big
Measure high temperature reduction gas, it is therefore desirable to which synthesis also Primordial Qi at high temperature increases energy consumption；(2) shaft furnace energy loss is big, production efficiency
It is low.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of gas bases for producing cold direct reduced iron to erect
High-temperature cooling gas effectively can be discharged shaft furnace, increase gas-based shaft kiln reduction efficiency by furnace.
The utility model improves a kind of gas-based shaft kiln for producing cold reduced iron, and the gas-based shaft kiln includes:
Gas-based shaft kiln ontology, the gas-based shaft kiln inner cavity are followed successively by preheating section, reduction section and cooling section from top to bottom；
Pelletizing material inlet, the pelletizing material inlet are arranged at the top of the preheating section；
High temperature reduction gas entrance, the high temperature reduction gas entrance are arranged on the outer wall of the reduction section bottom；
Cooling air inlet, the cooling air inlet are arranged on the outer wall of the cooling section bottom；
Stock gas outlet, the stock gas outlet are arranged at the top of the preheating section；
The outlet of High-temperature cooling gas, the High-temperature cooling gas outlet are arranged on the outer wall at the top of the cooling section；
Cold direct reduced iron outlet, the cold direct reduced iron outlet are arranged in the gas-based shaft kiln bottom；And
Current equalizer, the current equalizer are arranged in the gas-based shaft kiln bosh,
Wherein, the current equalizer and the gas-based shaft kiln junction are High-temperature cooling gas outlet,
Wherein, the injection bore dia of the cooling air inlet is 100~500mm,
Wherein, the inclination angle of the cooling air inlet and shaft is 5~75 °.
Further, the gas-based shaft kiln further include:
Stock gas discharge line, the stock gas discharge line are separately connected at the stock gas outlet and coal gas
Manage device.
Further, the current equalizer is hollow taper current equalizer.
Further, the gas-based shaft kiln cooling air inlet endless tube is uniformly distributed in gas-based shaft kiln shaft.
Further, three independent material-loosing apparatus systems are arranged in different height inside the gas-based shaft kiln.
Further, three material-loosing apparatus systems are located in the middle part of reduction section, are in the middle part of cooling section and cold straight
Connect reduced iron outlet top.
The utility model has the beneficial effects that cooling air is by shaft furnace bottom coohng gas by the gas-based shaft kiln of the utility model
Entrance enters shaft furnace, is guided by current equalizer and exports discharge by High-temperature cooling gas, can effectively realized to pelletizing object after high temperature reduction
The cooling of material.
Detailed description of the invention
Fig. 1 is the gas-based shaft kiln structural schematic diagram of the utility model；
Fig. 2 is that cooling air moves schematic diagram in the gas-based shaft kiln of the utility model；
Fig. 3 is pelletizing material movement schematic diagram in the gas-based shaft kiln of the utility model.
It is marked in attached drawing as follows:
1. gas-based reduction shaft furnace；101. preheating section；102. reduction section；103. cooling section；110. pelletizing material inlet；120.
High temperature reduction gas entrance；130. cooling air inlet；140. stock gas exports；The outlet of 150. High-temperature cooling gas；160. is cold direct
Reduced iron outlet.
2. current equalizer.
Specific embodiment
Below in conjunction with attached drawing, specific embodiment of the present utility model is described in more details, so as to more
The embodiment of the utility model and its various aspects are understood well a little.However, specific embodiments described below is only
The purpose of explanation, rather than limitations of the present invention.
The utility model proposes a kind of gas-based shaft kilns for producing cold direct reduced iron, below with reference to Fig. 1-Fig. 3 description pair
Gas-based shaft kiln 1 is described in detail in the utility model, this gas-based shaft kiln goes mainly for the production of cold direct reduced iron.
1 inner cavity of gas-based shaft kiln ontology successively includes preheating section 101, reduction section 102 and cooling section 103 from up to down.Gas base
The top of preheating section 101 is provided with pelletizing material inlet 110 in shaft furnace ontology 1, for pelletizing material to be added to gas-based shaft kiln 1
In.1 bottom of gas-based shaft kiln ontology is provided with cold direct reduced iron outlet 160, for gas-based shaft kiln to be discharged in cold direct reduced iron
Ontology 1.It is provided with cooling air inlet 130 on the outer wall of 103 bottom of cooling section, for cooling air to be passed through gas-based shaft kiln ontology 1,
To cool down in cooling section 103 to high temperature pelletizing material, the injection bore dia of cooling air inlet is 100~500mm.Reduction
It is provided with high temperature reduction gas entrance 120 on the outer wall of 102 bottoms of section, for reducing gas to be passed through gas-based shaft kiln ontology 1, so as to
Reduction reaction occurs in reduction section 102.Stock gas outlet 140 is provided at the top of preheating section 101, for stock gas to be discharged
Gas-based shaft kiln ontology 1.103 top of cooling section, current equalizer 2 and 1 junction of gas-based shaft kiln ontology are provided with the outlet of High-temperature cooling gas
150, for shaft furnace will be discharged by the cooling air after the heating of high temperature pelletizing material.Current equalizer 2 is hollow taper current equalizer.
Preferably, gas-based shaft kiln further includes stock gas discharge line, and stock gas discharge line is separately connected the furnace
Push up gas exit and coal gas processing device.
In the present invention, cooling air is bottom-up, successively passes through the cooling air inlet 130, by cooling section 103
And current equalizer 2, by 150 discharge of High-temperature cooling gas outlet.In other words, cooling air enters shaft furnace by cooling section bottom, in cooling section
After being cooled down to pelletizing material, discharge shaft furnace is exported by High-temperature cooling gas under air deflector effect, one is carried out outside shaft furnace
Fixed processing, enters shaft furnace by cooling section bottom again, forms circulation.200KPa positive pressure is set at High-temperature cooling gas outlet 150, with
The gas-based shaft kiln smoothly is discharged in High-temperature cooling gas.
In the present invention, pelletizing material from up to down, successively passes through pelletizing material inlet 110, and preheating section 101 is gone back
Former section 102 and cooling section 103, by 160 discharge of cold direct reduced iron outlet.
Cooling air cools down pelletizing material in cooling section motion process, produces cold direct reduced iron；It is same with this
When, shaft furnace is discharged by current equalizer 2 in cooling air.
In the present invention, due to the fact, that there are four the branch gripping arm of right-angled intersection, branch gripping arms one on current equalizer 2
End extends to inside upper conical portion, and the other end is connect with gas-based shaft kiln shaft, plays support tapered section acts；Four branch gripping arms exist
It is connected with each other outside shaft furnace and there is common connection head.When producing cold direct reduced iron, four branch gripping arm cross sectional shapes are
Inverted U, and this connection head has positive pressure 200KPa, therefore the gas come from cooling section can be directed to by branch gripping arm
It outside shaft furnace, and is discharged from connection head, so that current equalizer 2 can be collected effectively and cooling air is exported shaft furnace, while can play
Stream effect in uniform furnace.
In the present invention, gas-based shaft kiln ratio of height to diameter with higher, furnace top gas temperature is lower, and it is perpendicular that gas base can be improved
The efficiency of furnace.
In the present invention, gas-based shaft kiln cooling air inlet endless tube is uniformly distributed and shaft furnace shaft, and cooling air inlet
With shaft have certain inclination angle, generally 5~75 °, it is ensured that cooling air can smoothly enter into shaft furnace centre, to improve cooling
Efficiency.
In the present invention, three material-loosing apparatus systems are arranged in different height inside gas-based shaft kiln, are located at reduction section
In the middle part of middle part, cooling section and cold direct reduced iron exports top, can play the role of uniformly saving energy consumption with bulk material, mentioning
High shaft furnace operational efficiency.Meanwhile the material-loosing apparatus of each internal system is mutually indepedent, still can guarantee inside shaft furnace under unusual service condition
The smooth decline of furnace charge.Material-loosing apparatus revolving speed can be adjusted according to actual requirement.
With reference to Fig. 2, in the present invention, cooling air temperature is 40 DEG C, and cooling air is bottom-up, successively by described cold
But gas entrance is finally exported by the High-temperature cooling gas and is discharged by the cooling section and the current equalizer, High-temperature cooling temperature
Degree is 300 DEG C.
With reference to Fig. 3, in the present invention, pelletizing material from up to down, successively passes through the pelletizing material inlet, described
Preheating section, the reduction section and the cooling section are finally exported by cold direct reduced iron and are discharged, cold direct reduced iron temperature is discharged
Degree is 50 DEG C.
There are many utility model concrete application approach, and the above is only the preferred embodiment of the utility model, should
It points out, for those skilled in the art, without departing from the principle of this utility model, can also make
Several improvement out, these improvement also should be regarded as the protection scope of the utility model.
Claims (5)
1. a kind of gas-based shaft kiln for producing cold direct reduced iron, which is characterized in that the gas-based shaft kiln includes:
Gas-based shaft kiln ontology, the gas-based shaft kiln inner cavity are followed successively by preheating section, reduction section and cooling section from top to bottom；
Pelletizing material inlet, the pelletizing material inlet are arranged at the top of the preheating section；
High temperature reduction gas entrance, the high temperature reduction gas entrance are arranged on the outer wall of the reduction section bottom；
Cooling air inlet, the cooling air inlet are arranged on the outer wall of the cooling section bottom；
Stock gas outlet, the stock gas outlet are arranged at the top of the preheating section；
The outlet of High-temperature cooling gas, the High-temperature cooling gas outlet are arranged on the outer wall at the top of the cooling section；
Cold direct reduced iron outlet, the cold direct reduced iron outlet are arranged in the gas-based shaft kiln bottom；And
Current equalizer, the current equalizer are arranged in the gas-based shaft kiln bosh, are connect by branch gripping arm with the gas-based shaft kiln,
Wherein, the current equalizer and the gas-based shaft kiln junction are High-temperature cooling gas outlet,
Wherein, the injection bore dia of the cooling air inlet is 100~500mm,
Wherein, the inclination angle of the cooling air inlet and shaft is 5~75 °,
Wherein, gas-based shaft kiln cooling air inlet endless tube is uniformly distributed in gas-based shaft kiln shaft,
Wherein, the branch gripping arm cross sectional shape of the current equalizer is inverted U.
2. gas-based shaft kiln according to claim 1, which is characterized in that the gas-based shaft kiln further include:
Stock gas discharge line, the stock gas discharge line are separately connected the stock gas outlet and coal gas processing dress
It sets.
3. gas-based shaft kiln according to claim 1, which is characterized in that the current equalizer is hollow taper current equalizer.
4. gas-based shaft kiln according to claim 1, which is characterized in that different height is arranged three inside the gas-based shaft kiln
Independent material-loosing apparatus system.
5. gas-based shaft kiln according to claim 4, which is characterized in that three material-loosing apparatus systems are located at reduction section
In the middle part of middle part, cooling section and cold direct reduced iron exports top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821541786.8U CN209685837U (en) | 2018-09-20 | 2018-09-20 | A kind of gas-based shaft kiln producing cold direct reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821541786.8U CN209685837U (en) | 2018-09-20 | 2018-09-20 | A kind of gas-based shaft kiln producing cold direct reduced iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209685837U true CN209685837U (en) | 2019-11-26 |
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ID=68593968
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821541786.8U Active CN209685837U (en) | 2018-09-20 | 2018-09-20 | A kind of gas-based shaft kiln producing cold direct reduced iron |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111270038A (en) * | 2020-04-05 | 2020-06-12 | 上海泰普星坦新材料有限公司 | Moving bed reaction furnace for producing sponge iron by gas-based direct reduction |
| CN111304396A (en) * | 2020-04-05 | 2020-06-19 | 上海泰普星坦新材料有限公司 | Reaction system and process for producing sponge iron by gas-based direct reduction |
| CN112143846A (en) * | 2020-09-25 | 2020-12-29 | 西安建筑科技大学 | Gas-based reduction shaft furnace |
| CN113046508A (en) * | 2021-04-01 | 2021-06-29 | 刘宝山 | High-efficiency reduction shaft furnace for oxidized pellets and reduction process |
| CN115522007A (en) * | 2021-06-25 | 2022-12-27 | 中晋冶金科技有限公司 | Production process of hot pellet reduced iron |
| CN115612774A (en) * | 2022-10-12 | 2023-01-17 | 中南大学 | Novel method for making iron by directly reducing hydrogen-based shaft furnace |
| CN116769994A (en) * | 2023-08-25 | 2023-09-19 | 山西冶金工程技术有限公司 | Material loosening device of gas-based reduction shaft furnace |
-
2018
- 2018-09-20 CN CN201821541786.8U patent/CN209685837U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111270038A (en) * | 2020-04-05 | 2020-06-12 | 上海泰普星坦新材料有限公司 | Moving bed reaction furnace for producing sponge iron by gas-based direct reduction |
| CN111304396A (en) * | 2020-04-05 | 2020-06-19 | 上海泰普星坦新材料有限公司 | Reaction system and process for producing sponge iron by gas-based direct reduction |
| CN111304396B (en) * | 2020-04-05 | 2023-12-22 | 上海泰普星坦新材料有限公司 | Reaction system and process for producing sponge iron by gas-based direct reduction |
| CN112143846A (en) * | 2020-09-25 | 2020-12-29 | 西安建筑科技大学 | Gas-based reduction shaft furnace |
| CN113046508A (en) * | 2021-04-01 | 2021-06-29 | 刘宝山 | High-efficiency reduction shaft furnace for oxidized pellets and reduction process |
| CN115522007A (en) * | 2021-06-25 | 2022-12-27 | 中晋冶金科技有限公司 | Production process of hot pellet reduced iron |
| CN115612774A (en) * | 2022-10-12 | 2023-01-17 | 中南大学 | Novel method for making iron by directly reducing hydrogen-based shaft furnace |
| CN115612774B (en) * | 2022-10-12 | 2024-04-30 | 中南大学 | New method for directly reducing iron-making by hydrogen-based shaft furnace |
| CN116769994A (en) * | 2023-08-25 | 2023-09-19 | 山西冶金工程技术有限公司 | Material loosening device of gas-based reduction shaft furnace |
| CN116769994B (en) * | 2023-08-25 | 2023-11-17 | 山西冶金工程技术有限公司 | Material loosening device of gas-based reduction shaft furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211221 Address after: 032600 Zhangba village, Longquan Township, Zuoquan County, Jinzhong City, Shanxi Province (Zuoquan Yongxing Coal Chemical Co., Ltd.) Patentee after: CHINA SHANXI TAIHANG MINING Co.,Ltd. Address before: 032600 circular economy industrial park, Longquan Township, Zuoquan County, Jinzhong City, Shanxi Province Patentee before: CHINA SHANXI METALLURGY TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |