CN113073164A - Rotary kiln for reduction of nickel iron ore - Google Patents
Rotary kiln for reduction of nickel iron ore Download PDFInfo
- Publication number
- CN113073164A CN113073164A CN202110465651.8A CN202110465651A CN113073164A CN 113073164 A CN113073164 A CN 113073164A CN 202110465651 A CN202110465651 A CN 202110465651A CN 113073164 A CN113073164 A CN 113073164A
- Authority
- CN
- China
- Prior art keywords
- section
- rotary kiln
- reduction
- barrel
- iron ore
- 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.)
- Pending
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 24
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000011819 refractory material Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 5
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims 1
- 229910052683 pyrite Inorganic materials 0.000 claims 1
- 239000011028 pyrite Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/06—Making pig-iron other than in blast furnaces in rotary kilns
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a rotary kiln for reducing nickel iron ore, which comprises a barrel body and a driving support device, wherein the barrel body is sequentially provided with a preheating section, a drying and dehydrating section, a reducing section, a smelting section and a cooling section along the moving direction of materials, the reducing section is provided with an air inlet, and the drying and dehydrating section and/or the preheating section is provided with an air outlet. The air inlet of the rotary kiln reduction section for the reduction of the nickel iron ore is provided with the air blower, the air inlet amount can be adjusted according to needs, the incomplete combustion of the coal powder is controlled, the reducing atmosphere at the tail of the kiln is reached, and the metal reduction rate is improved. When the temperature of the rotary kiln needs to be increased, air is continuously blown into the rotary kiln, so that combustible gas in the flue gas is combusted. In addition, this application is provided with the air outlet at dry dehydration section and/or preheating section, and air outlet department can set up the air exhauster, and air intake and air outlet form the convection current, and the high temperature flue gas that the make full use of reduction smelting production preheats and dries the ore deposit, has saved the energy consumption greatly.
Description
Technical Field
The invention relates to the technical field of production of nickel iron ore, in particular to a rotary kiln for reduction of nickel iron ore.
Background
At present, the relatively advanced technology for laterite-nickel iron adopted in China is rotary kiln prereduction-electric furnace smelting technology, the secondary technology needs smelting under the condition of high-temperature melting, the single-furnace treatment capacity is limited, the energy consumption is high, and the production cost is high. In order to increase the yield, facilitate the expanded production and limit the cost, a technology of directly reducing the nickel iron ore by using a rotary kiln has been developed.
Disclosure of Invention
The invention aims to overcome the defect of high energy consumption of the electric furnace smelting technology in the prior art, and provides a rotary kiln for reducing nickel iron ore by utilizing a rotary kiln.
The purpose of the invention is realized by the following technical scheme:
the rotary kiln for reducing the nickel iron ore comprises a barrel body and a driving supporting device, wherein the barrel body is sequentially provided with a preheating section, a drying and dehydrating section, a reducing section, a smelting section and a cooling section along the moving direction of materials, the reducing section is provided with an air inlet, and the drying and dehydrating section and/or the preheating section are/is provided with an air outlet.
As preferred, the cover is equipped with the drive coil that is driven by drive strutting arrangement on the barrel, be connected with the radials between drive coil and the barrel, there is the contained angle between the direction of setting up of radials and the barrel is radial.
Preferably, the web is arranged tangentially to the barrel.
Preferably, a water spraying device is arranged outside the cooling section, and a water inlet end of the water spraying device is connected with a water storage device.
Preferably, a descaling roller is arranged on the outer side of the cooling section, a descaling plate is mounted on the descaling roller, and the length of the descaling plate is matched with the distance between the surface of the descaling roller and the outer surface of the cylinder body.
Preferably, a refractory material layer and a support frame for supporting the refractory material layer are arranged in the cylinder body.
Preferably, the driving support device comprises a driving roller connected with the motor and a driven roller arranged in parallel with the driving roller, and the driving ring is arranged on the driving support device and is tangent to both the driving roller and the driven roller.
Preferably, a rigid material turning structure is arranged in the cylinder and comprises a turning plate and a rigid fixing piece for fixing the turning plate in the cylinder.
Preferably, a flexible material turning structure is arranged in the barrel and comprises a turning plate and a flexible fixing piece for connecting the turning plate in the barrel.
Preferably, the rigid material turning structures and the flexible material turning structures are sequentially arranged at intervals along the circumferential direction of the cylinder body.
The invention has the following advantages:
the air inlet of the rotary kiln reduction section for the reduction of the nickel iron ore is provided with the air blower, the air inlet amount can be adjusted according to needs, the incomplete combustion of the coal powder is controlled, the reducing atmosphere at the tail of the kiln is reached, and the metal reduction rate is improved. When the temperature of the rotary kiln needs to be increased, air is continuously blown into the rotary kiln, so that combustible gas in the flue gas is combusted. In addition, this application is provided with the air outlet at dry dehydration section and/or preheating section, and air outlet department can set up the air exhauster, and air intake and air outlet form the convection current, and the high temperature flue gas that the make full use of reduction smelting production preheats and dries the ore deposit, has saved the energy consumption greatly.
The arrangement of the radial plate can play a role in buffering, so that rigid collision or gaps between the cylinder and the driving support device are avoided; on the other hand, the heat insulation effect can be achieved, the heat in the cylinder is reduced to be transmitted to the driving supporting device, and the loss of the driving supporting device is prolonged.
Drawings
FIG. 1 is a schematic view of a structure according to one aspect of the present invention.
Fig. 2 is a schematic view of another aspect of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention conventionally lay out when in use, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a rotary kiln for reducing nickel iron ore, which comprises a cylinder body 1 and a driving support device 2, wherein the cylinder body 1 is sequentially provided with a preheating section, a drying and dehydrating section, a reducing section, a smelting section and a cooling section along the moving direction of materials, the reducing section is provided with an air inlet, and the drying and dehydrating section and/or the preheating section is provided with an air outlet, as shown in fig. 1-2.
When the rotary kiln for reducing the nickel iron ore provided by the embodiment is used, materials sequentially pass through the preheating section, the drying and dehydrating section, the reducing section, the smelting section and the cooling section, wherein the air inlet of the reducing section is provided with the air blower, the air inlet amount can be adjusted as required, the incomplete combustion of coal powder is controlled, the reducing atmosphere at the tail of the kiln is achieved, and the metal reduction rate is improved. When the temperature of the rotary kiln needs to be increased, air is continuously blown into the rotary kiln, so that combustible gas in the flue gas is combusted. In addition, this application is provided with the air outlet at dry dehydration section and/or preheating section, and air outlet department can set up the air exhauster, and air intake and air outlet form the convection current, and the high temperature flue gas that the make full use of reduction smelting production preheats and dries the ore deposit, has saved the energy consumption greatly.
In order to avoid the leakage of the materials from the air inlet and the air outlet, the air inlet and the air outlet are provided with leakage-proof structures, and the leakage-proof structures can be leakage-proof nets or other structures.
In this embodiment, the cover is equipped with the driving coil 3 that is driven by drive strutting arrangement 2 on the barrel 1, be connected with radials 4 between driving coil 3 and the barrel 1, there is the contained angle between the direction of setting up of radials 4 and the barrel 1 is radial.
The driving ring 3 in this embodiment is fixed on the barrel 1, avoids barrel 1 direct and drive strutting arrangement 2 interact, and long-term use barrel 1 wearing and tearing are serious, the problem of being difficult to change, wherein, also can select to increase a reinforcing ring between radials 4 and the barrel 1 for radials 4 are relatively even to the effort of barrel 1. In addition, the number of the driving support means 2 and the driving coils 3 and the distance between the adjacent driving coils 3 can be adjusted according to the length of the cylinder 1.
The arrangement of the radial plate 4 can play a role in buffering, so that rigid collision or gap generation between the cylinder body 1 and the driving support device 2 is avoided; on the other hand, the heat insulation effect can be achieved, the heat transfer from the barrel 1 to the driving support devices 2 is reduced, the loss of the driving support devices 2 is prolonged, all the driving support devices 2 can be selected to be correspondingly provided with the driving coils 3 and the radial plates 4 as required during actual use, and the driving coils 3 and the radial plates 4 can also be arranged on the driving support devices 2 at specified positions.
In this embodiment, the spoke plate 4 is arranged along the tangential direction of the cylinder body 1, so that the buffering effect can be better exerted.
In this embodiment, the cooling zone outside is provided with water jet equipment 5, water jet equipment 5's the end of intaking is connected with water storage device, conveniently cools down the barrel 1 surface of cooling zone.
In this embodiment, a descaling roller 6 is arranged outside the cooling section, a descaling plate 7 is mounted on the descaling roller 6, and the length of the descaling plate 7 is matched with the distance between the surface of the descaling roller 6 and the outer surface of the cylinder 1.
When the outer surface of the cylinder 1 is cooled by adopting a water spraying mode, water is evaporated or vaporized under the action of high temperature, scale is easily formed on the surface of the cylinder 1, the cooling speed of the cylinder 1 is reduced by the existence of the scale, and therefore the scale formed on the surface of the cylinder 1 needs to be removed. However, because the surface temperature of the cylinder 1 is relatively high, if the cylinder 1 is in contact with the surface of the cylinder 1 for a long time, the service life of the descaling device can be greatly reduced due to high temperature and long-term abrasion, and the descaling device can be repaired and replaced to generate adverse effects on production, so that the descaling roller 6 and the descaling plate 7 are arranged in the device, the motor drives the descaling roller 6 to drive the descaling plate 7 to rotate, the descaling plates 7 on the descaling roller 6 can be sequentially in contact with the cylinder 1 to descale, the descaling plates 7 which are not in contact with the cylinder 1 can be in contact with air to cool, and the descaling plates 7 cannot be kept in a high-temperature environment for a long time.
In this embodiment, a refractory material layer and a support frame for supporting the refractory material layer are disposed in the cylinder 1.
The refractory material layer among the prior art is directly smeared on the inner wall of barrel 1, and the support frame can play the effect of supporting the refractory material layer, when the rotary kiln was made, can pour refractory material between support frame and barrel 1, raises the efficiency.
In this embodiment, the driving support device 2 includes a driving roller connected to a motor and a driven roller 22 parallel to the driving roller 21, and the driving ring 3 is disposed on the driving support device 2 and tangent to both the driving roller 21 and the driven roller 22.
The output end of the driving roller 21 is connected with the output end of the motor through a coupler, the driving roller 21 drives the barrel 1 to rotate through friction force between the driving roller 21 and the barrel 1, and the driven roller 22 and the driving roller 21 support the barrel 1 together.
In this embodiment, be provided with rigid stirring structure in barrel 1, rigid stirring structure is including turning over board 8 and will turning over board 8 and fix rigid mounting 10 in barrel 1, can overturn the material in barrel 1, is favorable to the material homogeneous mixing in barrel 1 or fully carries out heat exchange etc. with the gas in barrel 1.
In this embodiment, be provided with flexible stirring structure in the barrel 1, flexible stirring structure is including turning over board 8 and will turning over flexible mounting 9 of board 8 connection in barrel 1, and high temperature resistant metal chain or other structures can be selected to flexible mounting 9, will turn over board 8 and connect in barrel 1, owing to adopt flexible mounting 9, barrel 1 rotates the in-process, turns over the board 8 and can slide along the inner wall of barrel 1, alleviates and even avoids barrel 1 inner wall to take place the becket bride.
In this embodiment, the rigid material turning structure and the flexible material turning structure are sequentially arranged at intervals along the circumferential direction of the cylinder body 1. The arrangement is realized, however, the length of the flexible fixing pieces 9 needs to be selected according to the size of the cylinder 1, and the winding between the flexible fixing pieces 9 and the turnover plate 8 or the rigid fixing pieces 10 is avoided, so that the effect is not affected.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The rotary kiln for reducing the nickel iron ore is characterized in that: the device comprises a barrel and a driving support device, wherein the barrel is sequentially provided with a preheating section, a drying and dehydrating section, a reduction section, a smelting section and a cooling section along the moving direction of materials, the reduction section is provided with an air inlet, and the drying and dehydrating section and/or the preheating section is/are provided with an air outlet.
2. The rotary kiln for reduction of nickel iron ore according to claim 1, characterized in that: the cover is equipped with the drive coil that drives by drive strutting arrangement on the barrel, be connected with the radials between drive coil and the barrel, there is the contained angle between the direction of setting up of radials and the barrel is radial.
3. The rotary kiln for reduction of nickel iron ore according to claim 2, characterized in that: the spoke plate is arranged along the tangential direction of the cylinder body.
4. The rotary kiln for reduction of nickel iron ore according to claim 1, characterized in that: and a water spraying device is arranged outside the cooling section, and the water inlet end of the water spraying device is connected with a water storage device.
5. The rotary kiln for reduction of nickel iron ore according to claim 4, characterized in that: and a descaling roller is arranged outside the cooling section, a descaling plate is arranged on the descaling roller, and the length of the descaling plate is matched with the distance between the surface of the descaling roller and the outer surface of the cylinder body.
6. The rotary kiln for reduction of nickel iron ore according to claim 1, characterized in that: a refractory material layer and a support frame for supporting the refractory material layer are arranged in the cylinder body.
7. The rotary kiln for reduction of nickel iron ore according to claim 1, characterized in that: the driving support device comprises a driving roller connected with the motor and a driven roller arranged in parallel with the driving roller, and the driving ring is arranged on the driving support device and is tangent to both the driving roller and the driven roller.
8. The rotary kiln for reduction of nickel iron ore according to claim 1, characterized in that: the device comprises a barrel, wherein a rigid material turning structure is arranged in the barrel and comprises a turning plate and a rigid fixing piece for fixing the turning plate in the barrel.
9. The rotary kiln for reduction of nickel iron ore according to claim 8, characterized in that: the flexible material turning structure is arranged in the barrel and comprises a turning plate and a flexible fixing piece for connecting the turning plate in the barrel.
10. The rotary kiln for pyrite reduction according to claim 9, wherein: the rigid material turning structure and the flexible material turning structure are sequentially arranged at intervals along the circumferential direction of the barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465651.8A CN113073164A (en) | 2021-04-28 | 2021-04-28 | Rotary kiln for reduction of nickel iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465651.8A CN113073164A (en) | 2021-04-28 | 2021-04-28 | Rotary kiln for reduction of nickel iron ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113073164A true CN113073164A (en) | 2021-07-06 |
Family
ID=76618958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110465651.8A Pending CN113073164A (en) | 2021-04-28 | 2021-04-28 | Rotary kiln for reduction of nickel iron ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113073164A (en) |
Citations (7)
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|---|---|---|---|---|
| CN101870549A (en) * | 2009-04-27 | 2010-10-27 | 上海环保工程成套有限公司 | Circulation coupling process for drying mud by waste heat of cement kiln tail gas |
| JP2010249476A (en) * | 2009-04-20 | 2010-11-04 | Fujita Seisakusho:Kk | Rotary kiln |
| CN103743227A (en) * | 2014-01-17 | 2014-04-23 | 中国大唐集团科学技术研究院有限公司 | Industrial rotary kiln |
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| CN207016493U (en) * | 2017-06-06 | 2018-02-16 | 杭州润洁炭素科技有限公司 | A kind of low energy consumption internal heating formula rotary furnace regenerated carbon device |
| CN207515503U (en) * | 2017-12-01 | 2018-06-19 | 湘潭华宇电炉制造有限公司 | Rotary kiln and calciner |
| CN110229939A (en) * | 2019-07-15 | 2019-09-13 | 陶立群 | A kind of non-burnt iron-smelting device of two sections of kiln processes |
-
2021
- 2021-04-28 CN CN202110465651.8A patent/CN113073164A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| JP2010249476A (en) * | 2009-04-20 | 2010-11-04 | Fujita Seisakusho:Kk | Rotary kiln |
| CN101870549A (en) * | 2009-04-27 | 2010-10-27 | 上海环保工程成套有限公司 | Circulation coupling process for drying mud by waste heat of cement kiln tail gas |
| CN103743227A (en) * | 2014-01-17 | 2014-04-23 | 中国大唐集团科学技术研究院有限公司 | Industrial rotary kiln |
| CN105648132A (en) * | 2016-01-25 | 2016-06-08 | 唐竹胜 | Coal-based muffle type rotary kiln and method for low-temperature deep and rapid reduction of iron |
| CN207016493U (en) * | 2017-06-06 | 2018-02-16 | 杭州润洁炭素科技有限公司 | A kind of low energy consumption internal heating formula rotary furnace regenerated carbon device |
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Non-Patent Citations (1)
| Title |
|---|
| 华南工学院 天津轻工业学院合编: "《制浆造纸机械与设备（上册）》", 轻工业出版社, pages: 446 - 447 * |
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Application publication date: 20210706 |
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