CN103014215A - Rotary hearth furnace - Google Patents
Rotary hearth furnace Download PDFInfo
- Publication number
- CN103014215A CN103014215A CN2012105654436A CN201210565443A CN103014215A CN 103014215 A CN103014215 A CN 103014215A CN 2012105654436 A CN2012105654436 A CN 2012105654436A CN 201210565443 A CN201210565443 A CN 201210565443A CN 103014215 A CN103014215 A CN 103014215A
- Authority
- CN
- China
- Prior art keywords
- bed
- rotary hearth
- hearth furnace
- rotatable platform
- stirring
- 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
Images
Landscapes
- Tunnel Furnaces (AREA)
Abstract
The invention discloses a rotary hearth furnace, which includes a furnace body, and at least one material layer stirring device fixedly arranged inside the furnace body and positioned above a rotating platform, wherein the rotating platform and a driving mechanism for driving the rotating platform to rotate are arranged inside the furnace body; a support device used for supporting the rotating platform is arranged under the rotating platform; the material layer stirring device includes at least one row of stirring rake teeth extending towards the rotating platform and used for stirring material layers placed on the rotating platform. According to the rotary hearth furnace provided by the invention, the material layer stirring device is arranged inside the furnace body, and the stirring rake teeth for stirring the material layers placed on the rotating platform are arranged on the material layer stirring device, so that during the operation of the rotary hearth furnace, the material layers are stirred by the stirring rake teeth to reserve new clearance among the material layers, as a result, radiating heat can be transferred to the lower material layer through the clearance, the lower material layer can be heated more completely and more uniformly, that is, the heat transfer efficiency for the radiating heat is improved, the thickness of the material layers can be increased, and the production efficiency of the rotary hearth furnace can be improved.
Description
Technical field
The present invention relates to a kind of rotary hearth furnace, concrete can increase bed of material heat transfer efficiency and the rotary hearth furnace that makes bed of material thermally equivalent for a kind of.
Background technology
Rotary hearth furnace direct-reduction technique has the advantages such as simple, the with short production cycle and speed of response of equipment is fast, particularly aspect processing Steel Plant zinc-containing dust, have economic and social benefits, thereby rotary hearth furnace process extensively promoted all over the world since being born, and becomes one of main flow technique of coal-based DR process.
The process that rotary hearth furnace process is produced direct-reduced iron is as follows: powdered iron ore or zinc-containing dust are evenly mixed rear pelletizing or briquetting with reductive agent (mainly being coal dust), through after the oven dry carbonaceous pelletizing/briquetting being evenly arranged on the rotatable platform of rotary hearth furnace, can obtain degree of metalization through intensification heating, reduction and cooling stages and be higher than 85% metallized pellet/briquetting, if process then recyclable zinc oxide in flue gas of zinc-containing dust.About 20 ~ 35 minutes of pelletizing/briquetting or the briquetting residence time in rotary hearth furnace, production efficiency is about 65kg/ ㎡.Rotary hearth furnace equipment is for the production of the advantage of the iron of directly redeeming a vow to a god, reduction temperature high (temperature can reach 1300 ℃), time are short, and the bed of material and rotary hearth furnace platform transfixion, thereby avoid such as problems such as the furnace charge of rotary kiln, fluidized-bed and number furnaceman skill and equipment bonding, temperature of reaction are not high.
Because rotary hearth furnace adopts the type of heating of radiative transfer to make ferriferous oxide in pelletizing/briquetting or the briquetting by wherein carbon and the reduction of volatility reducing gas, the heat of high temperature of burner combustion will lean on flame radiaton to conduct heat in the rotary hearth furnace, because bed of material transfixion, the heat of burned flame can only reach bed of material surface, the part heat also can only arrive apart from the place on 1 ~ 2 layer on surface by bed of material space, so that bed thickness only can be 30 ~ 50mm, if bed thickness increases, the degree of metalization of lower floor's pelletizing/briquetting is low, intensity difference, thereby rotary hearth furnace process production efficiency is low.
In view of this, in order to solve the defective of accepting the radiative transfer inequality owing to the static bed of material that causes of the bed of material in the rotary hearth furnace, the present invention is intended to explore a kind of rotary hearth furnace, can increase bed of material heat transfer homogeneity and heat transfer efficiency in the rotary hearth furnace, and increases the production efficiency of rotary hearth furnace.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of rotary hearth furnace, and this rotary hearth furnace can make each bed of material all can evenly accept radiation heating, and improves the production efficiency of photothermal heat transfer efficiency and raising rotary hearth furnace.
Realize above-mentioned technical purpose, the present invention has at first proposed a kind of rotary hearth furnace, comprise body of heater, be provided with rotatable platform in the described body of heater and be used for driving the driving mechanism that rotatable platform rotates, described rotatable platform below is provided with the bracing or strutting arrangement for the support rotating platform, also comprise at least one bed of material agitator that is fixedly installed in the described body of heater and is positioned at described rotatable platform top, described bed of material agitator comprises that at least one row extends and be placed on for stirring the stirring rake teeth of the bed of material on the described rotatable platform towards described rotatable platform.
Further, described bed of material agitator is at least three and corresponding heating zone, reduction zone and the cooling zone that is arranged on described body of heater.
Further, described bed of material agitator comprises that also the bed of material stirs rake, and described stirring rake teeth is fixedly installed on the described bed of material and stirs on the rake, and the described bed of material stirs rake and is fixedly mounted in the described body of heater.
Further, also comprise be positioned at the baffle plate that pelletizing/briquetting that described rotatable platform edge is used for preventing being positioned at the rotatable platform edge drops under the stirring of described stirring rake teeth.
Further, the distance of the described rotatable platform of described baffle plate distance is less than the diameter that is placed on the pelletizing/briquetting on the described rotatable platform, or described baffle plate extends downward described rotatable platform below.
Further, described baffle plate is fixedly installed on the described bed of material stirring rake.
Further, the described bed of material stirs rake, stirring rake teeth and baffle plate and all adopts high temperature alloy to make, or is provided with the refrigerating unit that stirs rake, stirs rake teeth and baffle plate be used to cooling off the described bed of material in the described body of heater.
Further, the crown of described stirring rake teeth distance is placed on the distance of the bed of material bottom on the described rotatable platform less than the radius of the pelletizing/briquetting that consists of the bed of material.
Further, each is arranged described stirring rake teeth and all is arranged on described rotatable platform in the radial direction, and belongs to distance between adjacent two described stirring rake teeths of same row more than or equal to the twice of bed of material pelletizing/briquetting diameter in the rotary hearth furnace.
Further, described bed of material agitator comprises that at least two rows stir rake teeth, and the adjacent two described stirring rake teeths of row being staggered in the radial direction at described rotatable platform.
Beneficial effect of the present invention is:
Rotary hearth furnace of the present invention, by bed of material agitator is set in body of heater, and be provided for stirring the stirring rake teeth of the bed of material that is placed on the rotatable platform at bed of material agitator, in the rotary hearth furnace operation process, stir the bed of material by stirring rake teeth, make the new gap of generation between the bed of material, can make radiant heat be passed to lower floor's bed of material by this gap, namely improve photothermal heat transfer efficiency, and make the bottom bed of material more, be heated more uniformly, namely each bed of material of rotary hearth furnace all can more evenly be accepted radiation heating, in addition, because photothermal heat transfer efficiency improves, the thickness of the bed of material can be thicker, can improve the production efficiency of rotary hearth furnace.
By baffle plate is set, can prevent effectively that the pelletizing/briquetting that is placed on the rotatable platform edge from dropping in the water sealed tank that is arranged in the body of heater;
Be set to distance apart from rotatable platform bed of material bottom less than or equal to pelletizing/briquetting radius by the crown that stirs rake teeth, rake teeth can be guaranteed to stir and all bed of materials can be stirred, make radiant heat can be passed to smoothly the lowest layer bed of material, each bed of material is heated evenly;
By being stirred rake teeth, each row is arranged on rotatable platform in the radial direction, and the distance between adjacent two stirring rake teeths of same row is more than or equal to the twice of pelletizing/briquetting diameter, to guarantee that pelletizing/briquetting can smoothly by stirring rake teeth, prevent that the bed of material from stirring the accumulation of rake teeth place and preventing bed of material efflorescence;
Be crisscross arranged at the circumferential direction of rotatable platform by adjacent two rows are stirred rake teeth, can increase stirring efficient, radiant heat can be passed on each pelletizing/briquetting.
Description of drawings
Fig. 1 is the structural representation of rotary hearth furnace embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
As shown in Figure 1, be the structural representation of rotary hearth furnace embodiment of the present invention.The rotary hearth furnace of the present embodiment, comprise body of heater 1 and be fixedly installed in the described body of heater and be positioned at least one bed of material agitator of described rotatable platform top, be provided with rotatable platform 2 in the body of heater 1 and be used for driving the driving mechanism that rotatable platform 2 rotates, rotatable platform 2 belows are provided with the bracing or strutting arrangement 3 for the support rotating platform, and bed of material agitator comprises that at least one row extends and be placed on for stirring the stirring rake teeth 4 of the bed of material on the rotatable platform towards rotatable platform 2.The bed of material agitator of the present embodiment is at least three and corresponding heating zone, reduction zone and the cooling zone that is arranged on body of heater 1, is respectively applied to stir the bed of material of body of heater 1 heating zone, reduction zone and cooling zone.
The rotary hearth furnace of the present embodiment, by at the body of heater 1 interior bed of material agitator that arranges, and be provided for stirring the stirring rake teeth 4 of the bed of material that is placed on the rotatable platform at bed of material agitator, in the rotary hearth furnace operation process, stir the bed of material by stirring rake teeth 4, make and produce the gap between the bed of material, can make radiant heat be passed to lower floor's bed of material by the gap, namely improve photothermal heat transfer efficiency, and make the bottom bed of material more, be heated more uniformly, namely each bed of material of rotary hearth furnace all can more evenly be accepted radiation heating, in addition, because photothermal heat transfer efficiency improves, the thickness of the bed of material can be thicker, can improve the production efficiency of rotary hearth furnace.
Further, bed of material agitator comprises that also the bed of material stirs rake 5, stirs rake teeth 4 and is fixedly installed on the bed of material stirring rake 5, and the bed of material stirs rake 5 and is fixedly mounted in the body of heater 1, harrows 5 by arranging to stir, and is convenient to layout and the installation of bed of material agitator.Certainly, stir rake teeth 4 and also can directly be fixedly installed on body of heater 1 top, its principle is identical, be not repeated,
Further, the rotary hearth furnace of the present embodiment also comprises be positioned at the baffle plate 6 that pelletizing/briquetting that rotatable platform 2 edges are used for preventing being positioned at rotatable platform 2 edges drops under the stirring of stirring rake teeth 4.Baffle plate 6 apart from the distance of rotatable platform 2 less than the diameter that is placed on the pelletizing/briquetting on the rotatable platform 2, or baffle plate 6 extends downward rotatable platform 2 belows, this moment baffle plate 6 with half less than pelletizing/briquetting diameter of the distance at rotatable platform 2 edges, prevent that pelletizing/briquetting is stuck between baffle plate 6 and rotatable platform 2 edges.The baffle plate 6 of the present embodiment apart from the distance of rotatable platform 2 less than the diameter that is placed on the pelletizing/briquetting on the rotatable platform 2, the minimum width that the width of baffle plate 6 can not drop more than or equal to pelletizing/briquetting.By baffle plate 6 is set, can prevent effectively that the pelletizing/briquetting that is placed on rotatable platform 2 edges from dropping in the water sealed tank that is arranged in the body of heater 1.
Preferably, baffle plate 6 is fixedly installed on the bed of material and stirs on the rake 5, makes things convenient for layout and the installation of baffle plate 6, and certainly, the bed of material stirs rake 5 and also can be fixedly mounted in the body of heater 1, and its principle is identical, is not repeated.Preferably, the bed of material stirs rake 5, stirring rake teeth 4 and baffle plate 6 all adopts high temperature alloy to make, or be provided with in the body of heater 1 for cooling bed of material stirring rake 5, stir the refrigerating unit of rake teeth 4 and baffle plate 6, the present embodiment is provided with in body of heater 1 for the cooling bed of material and stirs rake 5, stir the water-chilling plant of rake teeth 4 and baffle plate 6, because the temperature in the body of heater 1 is up to more than 1250 ℃, the cooling bed of material that high temperature alloy is made stirs rake 5, can satisfy service requirements although stir rake teeth 4 and baffle plate 6, but work-ing life is not long, by refrigerating unit is set, can effectively increase the work-ing life of bed of material agitator.
Further, the cross section of stirring rake teeth 4 is circle or rhombus or ellipse or trilateral, and the cross section of the stirring rake teeth 4 of the present embodiment is circular, can reduce resistance, effectively stirs the bed of material.
Further, stir the crown of rake teeth 4 apart from the radius of the distance that is placed on the bed of material bottom on the rotatable platform 2 less than the pelletizing/briquetting that consists of the bed of material.Can guarantee to stir rake teeth 4 and can stir all bed of materials, make radiant heat can be passed to smoothly the lowest layer bed of material, each bed of material is heated more even.
Further, each row stirs rake teeth 4 and all is arranged on rotatable platform 2 in the radial direction, and belongs to adjacent two of same row and stir distance between the rake teeths 4 more than or equal to the twice of bed of material pelletizing/briquetting diameter in the rotary hearth furnace.To guarantee that pelletizing/briquetting can smoothly by stirring rake teeth 4, prevent that the bed of material from stirring the accumulation of rake teeth 4 places and preventing bed of material efflorescence;
Further, bed of material agitator comprises that at least two rows stir rake teeth 4, and adjacent two rows stir rake teeths 4 being staggered in the radial direction of rotatable platform 2, namely take rotatable platform 2 centers of rotation on the circumference in the center of circle, adjacent two rows stir to be had and only has one and stir rake teeth 4 in the rake teeths 4.Be crisscross arranged in the radial direction of rotatable platform 2 by adjacent two rows are stirred rake teeth 4, can increase stirring efficient.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. rotary hearth furnace, comprise body of heater, be provided with rotatable platform in the described body of heater and be used for driving the driving mechanism that rotatable platform rotates, described rotatable platform below is provided with the bracing or strutting arrangement for the support rotating platform, it is characterized in that: also comprise at least one bed of material agitator that is fixedly installed in the described body of heater and is positioned at described rotatable platform top, described bed of material agitator comprises that at least one row extends and be placed on for stirring the stirring rake teeth of the bed of material on the described rotatable platform towards described rotatable platform.
2. rotary hearth furnace according to claim 1 is characterized in that: described bed of material agitator is at least three and corresponding heating zone, reduction zone and the cooling zones that are arranged on described body of heater.
3. rotary hearth furnace according to claim 1 is characterized in that: described bed of material agitator comprises that also the bed of material stirs rake, and described stirring rake teeth is fixedly installed on the described bed of material and stirs on the rake, and the described bed of material stirs rake and is fixedly mounted in the described body of heater.
4. rotary hearth furnace according to claim 3 is characterized in that: also comprise being positioned at the baffle plate that pelletizing/briquetting that described rotatable platform edge is used for preventing being positioned at the rotatable platform edge drops under the stirring of described stirring rake teeth.
5. rotary hearth furnace according to claim 4 is characterized in that: the distance of the described rotatable platform of described baffle plate distance is less than the diameter that is placed on the pelletizing/briquetting on the described rotatable platform, or described baffle plate extends downward described rotatable platform below.
6. rotary hearth furnace according to claim 4 is characterized in that: described baffle plate is fixedly installed on the described bed of material and stirs on the rake.
7. rotary hearth furnace according to claim 4 is characterized in that: the described bed of material stirs rake, stir rake teeth and baffle plate all adopts high temperature alloy to make, or is provided with the refrigerating unit that stirs rake, stirs rake teeth and baffle plate be used to cooling off the described bed of material in the described body of heater.
8. each described rotary hearth furnace according to claim 1-8 is characterized in that: the crown distance of described stirring rake teeth is placed on the distance of the bed of material bottom on the described rotatable platform less than the radius of the pelletizing/briquetting that consists of the bed of material.
9. rotary hearth furnace according to claim 8, it is characterized in that: each is arranged described stirring rake teeth and all is arranged on described rotatable platform in the radial direction, and belongs to distance between adjacent two described stirring rake teeths of same row more than or equal to the twice of bed of material pelletizing/briquetting diameter in the rotary hearth furnace.
10. rotary hearth furnace according to claim 9 is characterized in that: described bed of material agitator comprises that at least two rows stir rake teeths, and the adjacent two described stirring rake teeths of row being staggered in the radial direction at described rotatable platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105654436A CN103014215A (en) | 2012-12-24 | 2012-12-24 | Rotary hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105654436A CN103014215A (en) | 2012-12-24 | 2012-12-24 | Rotary hearth furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103014215A true CN103014215A (en) | 2013-04-03 |
Family
ID=47963326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105654436A Pending CN103014215A (en) | 2012-12-24 | 2012-12-24 | Rotary hearth furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103014215A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3916043A1 (en) * | 1989-05-17 | 1990-11-22 | Haessler Andreas Dipl Ing Fh | Rotary soil-decontaminating furnace - is annular with metal surface and adjacent loading and discharging point |
| JP2000111264A (en) * | 1998-09-30 | 2000-04-18 | Daido Steel Co Ltd | Rotary furnace floor furnace |
| JP2002302710A (en) * | 2000-10-27 | 2002-10-18 | Nippon Steel Corp | Method for operating rotary hearth furnace, method for laying agglomerate onto rotary furnace hearth and facility for supplying raw material |
| JP2005037042A (en) * | 2003-07-15 | 2005-02-10 | Meidensha Corp | Heat processing device |
| EP1721995A1 (en) * | 2005-05-09 | 2006-11-15 | SUG Schmelz- und Giessanlagen GmbH & Co. KG | Metal melt rotary-drum furnace with protective atmosphere |
| CN102071273A (en) * | 2009-11-21 | 2011-05-25 | 天津荣程联合钢铁集团有限公司 | Rotary hearth furnace for directly reducing coal base into iron |
-
2012
- 2012-12-24 CN CN2012105654436A patent/CN103014215A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3916043A1 (en) * | 1989-05-17 | 1990-11-22 | Haessler Andreas Dipl Ing Fh | Rotary soil-decontaminating furnace - is annular with metal surface and adjacent loading and discharging point |
| JP2000111264A (en) * | 1998-09-30 | 2000-04-18 | Daido Steel Co Ltd | Rotary furnace floor furnace |
| JP2002302710A (en) * | 2000-10-27 | 2002-10-18 | Nippon Steel Corp | Method for operating rotary hearth furnace, method for laying agglomerate onto rotary furnace hearth and facility for supplying raw material |
| JP2005037042A (en) * | 2003-07-15 | 2005-02-10 | Meidensha Corp | Heat processing device |
| EP1721995A1 (en) * | 2005-05-09 | 2006-11-15 | SUG Schmelz- und Giessanlagen GmbH & Co. KG | Metal melt rotary-drum furnace with protective atmosphere |
| CN102071273A (en) * | 2009-11-21 | 2011-05-25 | 天津荣程联合钢铁集团有限公司 | Rotary hearth furnace for directly reducing coal base into iron |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102676187A (en) | Gas heat carrier low-temperature pyrolyzing furnace and gas heat carrier low-temperature pyrolyzing method | |
| CN106091677A (en) | Heating ceramic inner bag rotary furnace in a kind of | |
| CN107875977A (en) | A kind of high-pressure spiral fast pyrogenation reaction unit | |
| CN109652106A (en) | Pyrolysis installation and method for pyrolysis for solid organic castoff | |
| CN106403595A (en) | Oxidation-reduction roasting integrated rotary hearth furnace | |
| KR20130065711A (en) | External heating type coal material decomposition apparatus with multiple tubes | |
| CN108559538A (en) | A kind of biomass pyrolysis furnace | |
| CN104694138B (en) | A kind of mixed heating equipment and its application | |
| CN105953575A (en) | Self-detection indirect heating type rotary furnace | |
| CN113213449A (en) | Continuous reaction treatment method for graphite cathode material/phosphate and ternary anode material of lithium ion battery | |
| CN110375546B (en) | Double-layer novel multifunctional rotary hearth furnace system | |
| CN103014215A (en) | Rotary hearth furnace | |
| CN204097405U (en) | A kind of rotating bed pyrolysis oven for improving material destructive distillation ability | |
| CN204461041U (en) | Countercurrent flow manganese dioxide reduction rotary kiln | |
| CN110671931A (en) | System and method for recycling hot waste gas of rotary hearth furnace | |
| CN101550463B (en) | Novel direct-reduction rotary hearth furnace | |
| CN110425872B (en) | Pulse type combustion rotary hearth furnace | |
| CN105985788A (en) | Coal pyrolysis device | |
| CN106091680A (en) | A kind of rotary hearth furnace | |
| CN207608525U (en) | A kind of revolving bed pyrolysis oven | |
| CN202562290U (en) | Lifting device capable of preheating charging | |
| CN105907909A (en) | Dual-loop rotary hearth furnace | |
| CN205919669U (en) | Rotary hearth furnace | |
| CN107400768B (en) | A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system | |
| KR20010024881A (en) | Method for reducing iron oxides and installation therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |