CN201677036U - Device for performing secondary hydrogen reduction to powdered iron - Google Patents
Device for performing secondary hydrogen reduction to powdered iron Download PDFInfo
- Publication number
- CN201677036U CN201677036U CN2010201604608U CN201020160460U CN201677036U CN 201677036 U CN201677036 U CN 201677036U CN 2010201604608 U CN2010201604608 U CN 2010201604608U CN 201020160460 U CN201020160460 U CN 201020160460U CN 201677036 U CN201677036 U CN 201677036U
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- CN
- China
- Prior art keywords
- kiln
- rotary kiln
- iron powder
- reduction
- hydrogen reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a device capable of replacing a traditional steel strip furnace to perform secondary hydrogen reduction to powdered iron. The device comprises a rotary kiln; a discharge opening is formed on the kiln head of the rotary kiln; a hydrogen gas inlet pipeline serving as a shield gas transfer passage is connected to the kiln head of the rotary kiln; and a distributing device is connected to the kiln tail of the rotary kiln. The device achieves the secondary hydrogen reduction function of the rotary kiln skillfully through the gas inlet pipeline and the distributing device, so as to break through the usage limitation of the conventional rotary kiln. When in use, powdered iron after primary reduction directly enters the rotary kiln through the distributing device; meanwhile, shield gas (such as hydrogen gas or nitrogen gas) is filled in the kiln through the gas inlet pipeline so as to displace oxygen gas in the kiln body; and then hydrogen gas is filled to overspread the whole kiln body, so as to react with powdered iron via reduction reaction at high temperature. The utility model obtains better reduction effect in shorter time, lowers the whole technology cost, and can greatly improve the productivity of a single device and lower the investment of unit treatment capacity at the same time.
Description
Technical field
The utility model relates to a kind of industrial furnace, is specifically related to a kind of device that is used for iron powder is carried out the secondary hydrogen reduction.
Background technology
" basic principle of iron powder secondary reduction and technology controlling and process " (PM technique, in May, 1994, Yu Xieting) literary composition carried out comparatively detailed introduction to the secondary hydrogen reduction technology of existing powder metallurgy iron powder.This article points out that the industrial steel band stove that generally adopts carries out secondary reduction to the powder metallurgy iron powder at present.
The application's applicant finds by the long-term production practice summary, employing steel band stove carries out the secondary reduction existing questions and is: 1) thickness of feed layer (being that iron powder is deposited in the height on the steel band) is thin (is generally 20～30mm), thereby the single device disposal ability is little, causes the investment of unit capacity bigger; 2) the iron powder heating is inhomogeneous, influences reduction effect.
For these reasons, need a kind of separate unit production capacity of exploitation bigger, and the equipment that can guarantee reduction effect substitute the technology that the realization of steel band stove is carried out the secondary hydrogen reduction to reduced iron powder.
The utility model content
The technical problem that the utility model solved provides and a kind ofly can replace traditional steel band stove carries out the secondary hydrogen reduction to iron powder device.
The technical scheme that solves the problems of the technologies described above is: the device that is used for iron powder is carried out the secondary hydrogen reduction; comprise rotary kiln; the kiln hood of described rotary kiln is provided with discharging opening; also be connected with the hydrogen admission line of double as protective gas transfer passage on the kiln hood of described rotary kiln, the kiln tail place of described rotary kiln is connected with distribution device.
The improvement that this device carries out on the architecture basics of existing rotary kiln in fact, promptly by the secondary hydrogen reduction function of the ingenious realization rotary kiln of admission line and distribution device is set, thereby broken through the use limitation of existing rotary kiln, initiative realization migrating of existing rotary kiln, bigger with the separate unit production capacity of utilizing existing rotary kiln to be possessed, thereby and can drive material movement and guarantee that Inherent advantage such as homogeneous heating carries out the secondary hydrogen reduction to iron powder and handle, obtain good technical and economic benefit.
Further be that the kiln tail place of described rotary kiln is provided with the hydrogen firing device.
Further be to be provided with the inlet channel of protective gas on the kiln hood of described rotary kiln near the discharging opening place.
Further be that the kiln hood place of described rotary kiln is provided with cooling system between described admission line and discharging opening.
As preferably, described cooling system adopts circulating water cooling system.
Wherein, described circulating water cooling system adopts recirculated water ice chest or recirculated water cooling pipe.
The beneficial effects of the utility model are: once the iron powder after the reduction directly enters rotary kiln by distribution device; in kiln, charge into the oxygen that protective gas (as hydrogen or nitrogen) is replaced kiln body the inside by admission line simultaneously; and then charge into hydrogen and be covered with whole kiln body; thereby at high temperature with iron powder generation reduction reaction; because iron powder contacts fully with reducing gas in rotating process; obtained reduction effect preferably in the short period of time; the material waste heat is fully used; reduced whole technology cost; can significantly improve simultaneously the production capacity of single device, significantly reduce the investment of processed in units amount.
Description of drawings
Fig. 1 is used for the structural representation of the rotary kiln of hydrogen reducing for the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, this device adopts existing rotary kiln, comprises cylindrical shell 1 that liner plate is housed, kiln hood 10, kiln tail 7, the gear wheel 2 and the travelling gear 3 that is engaged with in the outside, cylindrical shell 1 middle part, the drive motors 4 that is used to drive this travelling gear 3, the wheel rim 5 on the cylindrical shell 1, the carrying roller 6 of wheel rim 5 bottoms, facility or the parts such as discharging opening 11 below the kiln hood 10.On this basis, be connected with the hydrogen admission line 14 of double as protective gas transfer passage on the described kiln hood 10, kiln tail 7 places are connected with distribution device 8.
During use; once the iron powder after the reduction directly enters rotary kiln by distribution device 8; in kiln, charge into the oxygen that protective gas (as hydrogen or nitrogen) is replaced kiln body the inside by admission line 14 simultaneously; and then charge into hydrogen and be covered with whole kiln body; thereby at high temperature with iron powder generation reduction reaction; because iron powder contacts fully with reducing gas in rotating process; obtained reduction effect preferably in the short period of time; the material waste heat is fully used; reduced whole technology cost; can significantly improve simultaneously the production capacity of single device, significantly reduce the investment of processed in units amount.
On this basis, kiln tail 7 places of described rotary kiln also are provided with hydrogen firing device 9 (as the autoelectrinic ignition device), thereby make the interior unnecessary hydrogen of kiln body light automatically, discharge by this hydrogen firing device 9, also can carry out preheating to the iron powder that enters.
Because hydrogen enters and lights at kiln tail 7 places from kiln hood 10, so the flow direction of hydrogen in the kiln body is opposite with the direction of motion of material, and iron powder is fully reduced.
In addition, be provided with the inlet channel 12 of protective gas near discharging opening 11 places on the kiln hood 10 of described rotary kiln, can prevent by these inlet channel 12 input protection gases (as nitrogen) that air from entering to mix with hydrogen from discharging opening 11 and blast.
In addition, kiln hood 10 places of described rotary kiln are provided with cooling system between described admission line 14 and discharging opening 11.Cooling system can adopt circulating water cooling system 13, such as recirculated water ice chest or recirculated water cooling pipe etc., thereby after iron powder being carried out the protectiveness reduction, plays the effect of forcing the cooling material.
The concrete course of work of this device is: one time reduced iron powder enters rotary kiln by distribution device 8; liner plate cylindrical shell 1 is housed does the low speed revolution by gear drive; the kiln hood place charges into hydrogen or contains the gaseous mixture of nitrogen; airflow direction is opposite with the material traffic direction; material is lowered the temperature by the recirculated water cooling mode through kiln hood, in the nitrogen protection bottom discharge.Wherein unnecessary hydrogen can be lighted, discharge at kiln tail place.This rotary kiln can be widely used in powder metallurgy industry, and the whole system waste heat is fully used, and the separate unit disposal ability can significantly improve, and is energy-saving and cost-reducing, in the investment that guarantees can significantly reduce under the product quality premise processed in units amount.
Claims (6)
1. be used for iron powder is carried out the device of secondary hydrogen reduction; comprise rotary kiln; the kiln hood of described rotary kiln (10) is provided with discharging opening (11); it is characterized in that: also be connected with the hydrogen admission line (14) of double as protective gas transfer passage on the kiln hood of described rotary kiln (10), the kiln tail (7) of described rotary kiln locates to be connected with distribution device (8).
2. the device that is used for iron powder is carried out the secondary hydrogen reduction as claimed in claim 1 is characterized in that: the kiln tail (7) of described rotary kiln locates to be provided with hydrogen firing device (9).
3. the device that is used for iron powder is carried out the secondary hydrogen reduction as claimed in claim 1 is characterized in that: the kiln hood of described rotary kiln (10) is gone up the inlet channel (12) of locating to be provided with protective gas near discharging opening (11).
4. as claim 1, the 2 or 3 described devices that are used for iron powder is carried out the secondary hydrogen reduction, it is characterized in that: the kiln hood of described rotary kiln (10) is located to be positioned between described admission line (14) and the discharging opening (11) and is provided with cooling system.
5. the device that is used for iron powder is carried out the secondary hydrogen reduction as claimed in claim 4 is characterized in that: described cooling system adopts circulating water cooling system (13).
6. the device that is used for iron powder is carried out the secondary hydrogen reduction as claimed in claim 5 is characterized in that: described circulating water cooling system (13) adopts recirculated water ice chest or recirculated water cooling pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201604608U CN201677036U (en) | 2010-04-15 | 2010-04-15 | Device for performing secondary hydrogen reduction to powdered iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201604608U CN201677036U (en) | 2010-04-15 | 2010-04-15 | Device for performing secondary hydrogen reduction to powdered iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201677036U true CN201677036U (en) | 2010-12-22 |
Family
ID=43342096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201604608U Expired - Lifetime CN201677036U (en) | 2010-04-15 | 2010-04-15 | Device for performing secondary hydrogen reduction to powdered iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201677036U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248174A (en) * | 2011-06-28 | 2011-11-23 | 四川金沙纳米技术有限公司 | Gas reducing equipment for metal powder and preparation method of metal powder |
| CN103121106A (en) * | 2012-12-28 | 2013-05-29 | 六安市晖润粉末新材料有限公司 | Electrolytic copper powder drying and restoring continuous processing device and process |
| CN107745132A (en) * | 2017-10-20 | 2018-03-02 | 酒泉钢铁(集团)有限责任公司 | A kind of method that iron oxide red prepares high-purity iron powder |
| CN110000396A (en) * | 2019-04-09 | 2019-07-12 | 兰州有色冶金设计研究院有限公司 | A kind of reduction apparatus and method of fine iron breeze production reduced iron powder |
-
2010
- 2010-04-15 CN CN2010201604608U patent/CN201677036U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248174A (en) * | 2011-06-28 | 2011-11-23 | 四川金沙纳米技术有限公司 | Gas reducing equipment for metal powder and preparation method of metal powder |
| CN103121106A (en) * | 2012-12-28 | 2013-05-29 | 六安市晖润粉末新材料有限公司 | Electrolytic copper powder drying and restoring continuous processing device and process |
| CN103121106B (en) * | 2012-12-28 | 2017-04-19 | 六安市晖润粉末新材料有限公司 | Electrolytic copper powder drying and restoring continuous processing process |
| CN107745132A (en) * | 2017-10-20 | 2018-03-02 | 酒泉钢铁(集团)有限责任公司 | A kind of method that iron oxide red prepares high-purity iron powder |
| CN110000396A (en) * | 2019-04-09 | 2019-07-12 | 兰州有色冶金设计研究院有限公司 | A kind of reduction apparatus and method of fine iron breeze production reduced iron powder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: PANZHIHUA LIYU MINING CO., LTD. Free format text: FORMER OWNER: HE DEWU Effective date: 20111111 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111111 Address after: 617000 Panzhihua City, Sichuan province Miyi County town of Wu Qingcun seven back agency Panzhihua Liyu Mining Co. Ltd. Patentee after: Panzhihua Liyu Mining Co., Ltd. Address before: 617000 Panzhihua city of Sichuan Province East Ma Jia Tian Panzhihua Ruilong Yehua material development Co. Ltd. Patentee before: He Dewu |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101222 |
|
| CX01 | Expiry of patent term |