CN206469672U - A kind of double-layer heating rotary hearth furnace for being used to be reduced directly the mode of production - Google Patents
A kind of double-layer heating rotary hearth furnace for being used to be reduced directly the mode of production Download PDFInfo
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Abstract
The utility model is related to steel industry and coloured industry using direct-reduction manufacturing technique method and equipment, belongs to field of metallurgy, and in particular to a kind of double-layer heating rotary hearth furnace for being used to be reduced directly the mode of production.The rotary hearth furnace includes annular body of heater, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and transmission system；Wherein, the annular body of heater includes：Annular furnace, vibration material distributor and discharging machine；Wherein, the vibration material distributor includes material distributing machine main body, vibrating spring and vibrating motor；The heat power engineering system includes：Multiple drying tubes and multiple burners, wherein, it is equipped with drying tube in being located above and below the rotatable ring-shaped furnace bottom for the preheating zone；The burner is arranged on the furnace wall side wall of the reducing zone；The furnace bottom support and transmission system be arranged on the reducing zone on the base of the rotatable ring-shaped furnace bottom bottom.There is the utility model material to preheat, and abundant, handling process is short, equipment operation rate is high, low power consumption and other advantages.
Description
Technical Field
The utility model relates to a direct reduction production process method and equipment adopted in the steel industry and the nonferrous industry, which belongs to the metallurgy field, in particular to a double-layer heating rotary hearth furnace for a direct reduction production mode.
Background
Nowadays, there are various coal-based direct reduction processes, wherein the rotary hearth furnace reduction process has attracted extensive attention because of its advantages of simple equipment, easy operation, short production period, fast reaction speed, environmental friendliness, etc. The basic principle of the rotary hearth furnace iron making is that the metal oxide in the carbon-containing pellets is reduced at high temperature by burning through a flat flame burner positioned on the side wall of the furnace and transmitting the high temperature of the flame to the pellets on the surface of the material feeding layer through radiation, the heating energy mostly adopts natural gas, cracked gas, coke oven gas, converter gas, coal gas and the like, and the energy source is very wide. The process for Directly Reducing Iron (DRI) by adopting rotary hearth furnace equipment mainly comprises the following steps: uniformly mixing iron ore powder and reducing agent coal powder, pressing into carbon-containing pellets, and drying; and uniformly spreading the dried carbon-containing pellets on a rotary hearth furnace, and reducing the carbon-containing pellets in a reduction area (the temperature can reach 1100-1400 ℃) in the rotary hearth furnace for 15-30 min to obtain the metallized pellets with the metallization rate of more than 85%. The rotary hearth furnace apparatus for producing DRI has the advantages of high reduction temperature, short reduction time, and relative stationarity of furnace charge and furnace bottom, thus avoiding the problems of rotary kiln, fluidized bed adhesion, shaft furnace nodulation, etc. However, most of the prior art adopting the rotary hearth furnace to directly reduce more mature processes is that the raw materials are pretreated and then distributed into the rotary hearth furnace after being dried, the pretreatment process before the reduction of the rotary hearth furnace is complex, the production process flow is long, the equipment investment is large, the production cost is high, the energy consumption is high, and the like. Therefore, how to design a rotary hearth furnace with short process flow, low equipment investment, high equipment operation rate and low energy consumption becomes a technical problem to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, a double-deck heating rotary hearth furnace for direct reduction production mode is proposed, this rotary hearth furnace all sets up the drying tube heating through rotatable furnace bottom upper strata in preheating zone and lower floor, and discharge the interior hot flue gas of stove from the exhaust port and let in the heating heat source as the drying tube preheating zone in the drying tube after removing dust, ensure that the material preheats fully, improve equipment thermal efficiency, reduce the production energy consumption, it is short to have the processing procedure, the equipment investment is low, the equipment operation rate is high, the energy consumption is low, advantages such as the range of application is extensive.
In order to solve the technical problem, the utility model discloses a technical scheme does:
the utility model provides a double-deck heating rotary hearth furnace for direct reduction production mode. According to the embodiment of the utility model, the rotary hearth furnace comprises an annular furnace body, a rotatable annular furnace bottom, a thermal system, a furnace bottom bracket and a transmission system; wherein, annular furnace body includes: the annular hearth consists of an annular furnace wall, a furnace top, a preheating zone, a reduction zone partition wall and a discharge end retaining wall which are sequentially adjacent to each other, and a feeding zone, a preheating zone, a reduction zone and a discharge zone are formed, wherein the retaining wall is positioned between the preheating zone and the reduction zone, the discharge end retaining wall is positioned between the reduction zone and the discharge zone, and the retaining wall both extend downwards from the top wall of the rotary hearth furnace and keep a certain interval with the rotatable annular furnace bottom; two ends of the annular hearth are provided with an independent vibrating material distributor for feeding and a discharging machine for discharging, wherein the vibrating material distributor comprises a material distributor main body, a vibrating spring and a vibrating motor; the thermal system comprises: the device comprises a preheating zone, a plurality of drying pipes and a plurality of burners, wherein an upper layer of drying pipes are arranged above the rotatable annular furnace bottom of the preheating zone, and a lower layer of drying pipes are arranged below the rotatable annular furnace bottom of the preheating zone and are used for heating the preheating zone in a drying pipe mode; the burner is arranged on the side wall of the furnace wall of the reduction region and used for heating the reduction region in a burner mode; the furnace bottom support and the transmission system are arranged on a base of the reduction area, which is positioned at the lower part of the rotatable annular furnace bottom.
The inventor finds that according to the rotary hearth furnace provided by the embodiment of the utility model, compared with the traditional rotary hearth furnace which adopts the mode of heating by the side wall burner of the furnace wall, the rotary hearth furnace provided by the utility model is additionally provided with the drying tube preheating zone and the partition walls between the preheating zone and the reduction zone, thereby effectively solving the problem of nozzle blockage caused by more powder in the initial stage of material entering the furnace; in addition, the utility model can adopt the wet lump material or wet ball to directly connect into the rotary hearth furnace to process the raw material, thereby shortening the process flow, and reducing the equipment investment, the production cost and the production energy consumption; meanwhile, the utility model arranges the drying pipes for heating at the upper layer and the lower layer of the rotatable furnace bottom in the preheating zone, discharges hot flue gas in the furnace from the smoke outlet, removes dust and then leads the flue gas into the drying pipes to be used as a heating source of the preheating zone of the drying pipes, thereby ensuring the sufficient preheating of materials, improving the thermal efficiency of equipment and reducing the energy consumption of production; furthermore, the utility model discloses rotary hearth furnace can adopt heat accumulation formula combustion technology, can use inferior quality or low-quality fuel, has reduced the fuel cost, can promote at domestic and the area that lacks natural gas and high-quality fuel.
According to the embodiment of the utility model, the preheating zone heating temperature is 400 ℃ -900 ℃.
According to the embodiment of the utility model, the horizontal section of the rotary hearth furnace is circular, and the included angle of the circular ring in the preheating zone is 30-100 degrees.
According to an embodiment of the present invention, the feeding zone, the preheating zone, the reduction zone and the discharge zone are arranged in sequence along the rotation direction of the rotatable annular furnace bottom.
According to the utility model discloses an embodiment, be equipped with the exhaust port on the preheating zone brickwork, the interior flue gas of stove is followed the exhaust port discharges and lets in after removing dust in the drying tube, as the heating heat source of drying tube preheating zone.
According to the utility model discloses an embodiment rotatable annular stove bottom lower surface with the outer circumference department that annular furnace wall corresponds is equipped with the stove bottom water seal groove that is used for stove bottom sealing.
The utility model discloses following beneficial effect has at least:
1. compared with the traditional rotary hearth furnace which adopts the mode of heating by the side wall burner of the furnace wall, the rotary hearth furnace of the utility model is additionally provided with the drying tube preheating zone and the partition walls between the preheating zone and the reduction zone, thereby effectively solving the problem of nozzle blockage caused by more powder in the initial stage of material entering the furnace;
2. the utility model can adopt the wet lump material or wet ball to directly enter the rotary hearth furnace to process the raw material, thereby shortening the process flow, and reducing the equipment investment, the production cost and the production energy consumption;
3. the utility model has the advantages that the drying pipes are arranged on the upper layer and the lower layer of the rotatable furnace bottom of the preheating zone for heating, and the hot flue gas in the furnace is discharged from the smoke outlet, is dedusted and then is introduced into the drying pipe to be used as the heating heat source of the preheating zone of the drying pipe, thereby ensuring the sufficient preheating of the materials, improving the thermal efficiency of the equipment and reducing the energy consumption of the production;
4. the utility model discloses rotary hearth furnace can adopt heat accumulation formula combustion technology, can use inferior quality or low-quality fuel, has reduced the fuel cost, can promote at internal and the area that lacks natural gas and high-quality fuel.
Drawings
FIG. 1 is a schematic top view of a rotary hearth furnace according to the present invention.
FIG. 2 is a schematic view of the cross section of the hearth of the rotary hearth furnace of the present invention.
FIG. 3 is a schematic elevation view of the rotary hearth furnace of the present invention.
The device comprises a feeding area 1, a preheating area 2, a reduction area 3, a discharging area 4, a smoke outlet 5, a preheating area and reduction area partition wall 6, a discharging end retaining wall 7, a drying pipe 8, a burner 9, a vibrating distributor 10, a vibrating spring 11, a vibrating motor 12, a discharging machine 13, a furnace top 14, an annular furnace wall 15, a furnace bottom water seal tank 16, a material layer 17, a rotatable annular furnace bottom 18, a furnace bottom support and transmission system 19 and a base 20.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention.
The utility model provides a double-deck heating rotary hearth furnace for direct reduction production mode. According to the embodiment of the utility model, fig. 1 is the utility model discloses rotary hearth furnace's schematic view that overloads, fig. 2 is the utility model discloses rotary hearth furnace section schematic view, it is shown with reference to fig. 1 and fig. 2, this rotary hearth furnace includes: the furnace comprises an annular furnace body, a rotatable annular furnace bottom 18, a thermal system, a furnace bottom bracket and a transmission system 19; wherein, annular furnace body includes: the furnace comprises an annular hearth, a vibrating distributor 10 and a discharging machine 13, wherein the annular hearth consists of an annular furnace wall 15, a furnace top 14, a preheating zone and reduction zone partition wall 6 and a discharging end retaining wall 7, and the partition wall and the retaining wall both extend downwards from the top wall of the rotary hearth furnace and keep a certain interval with the rotary annular furnace bottom; two ends of the annular hearth are provided with an independent vibrating material distributor for feeding and a discharging machine for discharging, wherein the vibrating material distributor comprises a material distributor main body, a vibrating spring 11 and a vibrating motor 12; the thermal system comprises: the device comprises a plurality of drying pipes 8 and a plurality of burners 9, wherein an upper layer of drying pipes are arranged above the rotatable annular furnace bottom in the preheating zone, and a lower layer of drying pipes are arranged below the rotatable annular furnace bottom in the preheating zone and are used for heating the preheating zone in a drying pipe mode; the burner is arranged on the side wall of the furnace wall of the reduction region and used for heating the reduction region in a burner mode; the furnace bottom support and drive system 19 is located on the base 20 of the reduction zone below the rotatable annular furnace bottom.
The inventor finds that according to the rotary hearth furnace provided by the embodiment of the utility model, compared with the traditional rotary hearth furnace which adopts the mode of heating by the side wall burner of the furnace wall, the rotary hearth furnace provided by the utility model is additionally provided with the drying tube preheating zone and the partition walls between the preheating zone and the reduction zone, thereby effectively solving the problem of nozzle blockage caused by more powder in the initial stage of material entering the furnace; in addition, the utility model can adopt the wet lump material or wet ball to directly connect into the rotary hearth furnace to process the raw material, thereby shortening the process flow, and reducing the equipment investment, the production cost and the production energy consumption; meanwhile, the utility model arranges the drying pipes for heating at the upper layer and the lower layer of the rotatable furnace bottom in the preheating zone, discharges hot flue gas in the furnace from the smoke outlet, removes dust and then leads the flue gas into the drying pipes to be used as a heating source of the preheating zone of the drying pipes, thereby ensuring the sufficient preheating of materials, improving the thermal efficiency of equipment and reducing the energy consumption of production; furthermore, the utility model discloses rotary hearth furnace can adopt heat accumulation formula combustion technology, can use inferior quality or low-quality fuel, has reduced the fuel cost, can promote at domestic and the area that lacks natural gas and high-quality fuel.
According to the utility model discloses an embodiment, the utility model discloses a rotatable furnace bottom upper strata in preheating zone and lower floor all set up the drying tube heating to discharge the interior hot flue gas of stove from the exhaust port and let in the heating heat source of drying tube preheating zone in the drying tube after removing dust, ensure that the material preheats fully, improve equipment thermal efficiency, reduce the production energy consumption, the concrete number and the shape of drying tube and nozzle are unrestricted, as long as can play the effect of dry heating can, wherein, the shape of drying tube can be for P shape, W shape or U type, according to the utility model discloses a some embodiments, the utility model discloses the preferred U type that is of drying tube.
According to the utility model discloses an embodiment, the concrete shape of rotary hearth furnace's horizontal cross-section is unrestricted, the utility model discloses preferably ring shape, preheating zone ring contained angle is preferred 30-100, the utility model discloses rotary hearth furnace drying tube preheating zone ring contained angle should not be less than 30, if the ring contained angle is less than 30, then the material is too short in preheating zone retention time, can lead to the material moisture desorption incomplete, and remaining moisture influences the material district reducibility in the reducing zone desorption, reduces the reduction rate of valuable metal, nevertheless will influence the reduction effect of reducing zone material when rotary hearth furnace preheating zone ring contained angle is too big, so control preheating zone ring contained angle is not more than 100.
FIG. 3 is a schematic elevation view of a rotary hearth furnace according to an embodiment of the present invention, as shown in FIG. 3, the feeding zone 1, the preheating zone 2 with the heating temperature of 400-900 ℃, the reduction zone 3 and the discharging zone 4 which are sequentially adjacent in the annular hearth are sequentially arranged along the rotation direction of the rotatable annular hearth, wherein the partition wall is positioned between the preheating zone and the reduction zone, the discharge end retaining wall is positioned between the reduction zone and the discharge zone, according to some embodiments of the utility model, a partition wall is arranged between the preheating zone and the reduction zone, the device can prevent dust generated in the initial stage of feeding materials into the furnace from entering the reduction zone to influence the smooth production, and in addition, the discharge end is provided with the retaining wall to form a semi-closed structure with the reduction zone, so that the reduction atmosphere of the whole reduction zone can be effectively ensured, and the metal reduction effect is improved.
According to the embodiment of the utility model, the utility model discloses an add the drying tube preheating zone in rotary hearth furnace, this drying tube sets up in the furnace wall lateral wall, adopt the heat radiation mode to preheat the raw materials, all adopt the mode of furnace wall lateral wall nozzle heating to compare with traditional rotary hearth furnace, effectively solved the material and gone into the stove initial stage because the cloth mouth has certain difference in height at rotary hearth furnace's annular space top and stove bottom, the material goes into the great easy problem of blockking up the nozzle of dust volume in the stove initial stage stove, drying tube heating temperature is 400 ℃ -900 ℃, can preheat the mixed material, and effectively desorption goes into surface water and crystal water in the stove material, can direct wet lump material or wet ball go into the stove under the prerequisite that does not influence the product index, the pressure ball and the pelletizing drying process in front of rotary hearth furnace have been reduced process flow, the equipment investment has been reduced, it is short to have the processing procedure, the equipment investment is low, High operation rate of the equipment, low energy consumption, wide application range and the like.
During work, materials are uniformly distributed at the bottom of the rotary hearth furnace through the vibrating distributor 10 of the feeding area 1 of the rotary hearth furnace to form a material layer 17, the bottom of the rotary hearth furnace is driven to rotate through the bottom transmission system 19, the materials do not move relatively to the bottom of the rotary hearth furnace, the materials sequentially pass through the preheating area 2 and the reduction area 3 in a hearth along with the rotation of the bottom of the rotary hearth furnace, the preheating area is additionally provided with a drying tube in the furnace, the included angle of a circular ring of the preheating area is 30-100 degrees, and surface water and crystal water in the materials entering the furnace can be effectively removed when the heating temperature is 400-900 ℃; the reduction zone adopts an inner side wall and outer side wall regenerative burner heating mode, inferior or low-quality fuel can be used, the fuel cost is reduced, the material reduction effect is improved, the reduced material generated after reduction is discharged out of the rotary hearth furnace through a discharging machine 13 of a rotary hearth furnace discharging zone 4, smoke in the furnace is discharged from a smoke outlet 5, and the smoke is introduced into the drying tube after dust removal to serve as a heating heat source of a drying tube preheating zone, so that the heat efficiency of equipment is improved, and the production energy consumption is reduced.
According to the utility model discloses an embodiment, be equipped with exhaust port 5 on the preheating zone brickwork, the interior flue gas of stove is followed exhaust of exhaust port lets in after removing dust in the drying tube, as the heating heat source of drying tube preheating zone, the utility model discloses a rotatable stove bottom upper strata of preheating zone and lower floor all set up the drying tube heating, ensure that the material preheats fully, improve equipment thermal efficiency reduces the production energy consumption.
According to the utility model discloses an embodiment, the specific material of preheating zone and reduction zone partition wall is unrestricted, as long as can play the divided effect can, can be for resistant firebrick or fire-resistant knot material, according to the utility model discloses a some embodiments, the utility model discloses preferably be resistant firebrick.
According to the utility model discloses an embodiment, the concrete material of discharge end barricade is unrestricted, as long as can play the effect that blocks can, can be for resistant firebrick or fire-resistant knot material, according to the utility model discloses a some embodiments, the utility model discloses preferably be resistant firebrick. According to the utility model discloses an embodiment, vibrating motor's specific model is unrestricted, as long as can play the vibration material and with its vibration to the effect in the stove can.
According to the utility model discloses an embodiment, the concrete component part of stove bottom bracket and transmission is unrestricted, as long as can play support and driven effect can, according to some embodiments of the utility model, the preferred 2-4 sets of the number of sets of stove bottom bracket and transmission are in on the base of rotatable annular stove bottom lower part.
According to the utility model discloses an embodiment, the concrete kind of base at rotatable annular stove bottom is unrestricted, as long as can play the effect of support can, according to the utility model discloses a some embodiments, the utility model discloses preferred base is by the cylinder capable metal body of two parallels through the welding the lower part at rotatable annular stove bottom forms.
According to the utility model discloses an embodiment rotatable annular stove bottom lower surface with the outer circumference department that annular furnace wall corresponds is equipped with the stove bottom water seal groove 16 that is used for stove bottom sealing.
Example 1: as shown in figures 1, 2 and 3, a double-layer heating rotary hearth furnace for a direct reduction production mode has the diameter of 40m-60m, when in use, materials are uniformly distributed at the bottom of the rotary hearth furnace through a vibrating distributor 10 of a feeding area 1 of the rotary hearth furnace to form a material layer 17, the bottom of the rotary hearth furnace is driven to rotate through a bottom transmission system 19, the materials and the bottom of the rotary hearth furnace do not move relatively, the rotary hearth furnace sequentially passes through a preheating area 2 and a reduction area 3 along with the rotation of the bottom of the rotary hearth furnace, the rotary hearth furnace is internally provided with a drying pipe preheating area which adopts a drying pipe heating mode, the upper layer and the lower layer of the rotary hearth furnace are respectively provided with a drying pipe for heating, the materials are fully preheated, the included angle of a circular ring of the preheating area is 30-100 degrees, and the surface water and the crystal water in the materials entering the rotary hearth furnace can be effectively; the reduction zone adopts an inner side wall and outer side wall regenerative burner heating mode, inferior or low-quality fuel can be used, the fuel cost is reduced, the material reduction effect is improved, the reduced material generated after reduction is discharged out of the rotary hearth furnace through a discharging machine 13 of a rotary hearth furnace discharging zone 4, smoke in the furnace is discharged from a smoke outlet 5, and the smoke is introduced into the drying tube after dust removal to serve as a heating heat source of a drying tube preheating zone, so that the heat efficiency of equipment is improved, and the production energy consumption is reduced.
The inventor finds that according to the rotary hearth furnace provided by the embodiment of the utility model, compared with the traditional rotary hearth furnace which adopts the mode of heating by the side wall burner of the furnace wall, the rotary hearth furnace provided by the utility model is additionally provided with the drying tube preheating zone and the partition walls between the preheating zone and the reduction zone, thereby effectively solving the problem of nozzle blockage caused by more powder in the initial stage of material entering the furnace; in addition, the utility model can adopt the wet lump material or wet ball to directly connect into the rotary hearth furnace to process the raw material, thereby shortening the process flow, and reducing the equipment investment, the production cost and the production energy consumption; meanwhile, the utility model arranges the drying pipes for heating at the upper layer and the lower layer of the rotatable furnace bottom in the preheating zone, discharges hot flue gas in the furnace from the smoke outlet, removes dust and then leads the flue gas into the drying pipes to be used as a heating source of the preheating zone of the drying pipes, thereby ensuring the sufficient preheating of materials, improving the thermal efficiency of equipment and reducing the energy consumption of production; furthermore, the utility model discloses rotary hearth furnace can adopt heat accumulation formula combustion technology, can use inferior quality or low-quality fuel, has reduced the fuel cost, can promote at domestic and the area that lacks natural gas and high-quality fuel.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made in the above embodiments by those skilled in the art without departing from the scope of the present invention, and that various changes in the detailed description and applications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (5)
1. A double-layer heating rotary hearth furnace for a direct reduction production mode is characterized by comprising an annular furnace body, a rotatable annular furnace bottom, a thermal system, a furnace bottom bracket and a transmission system; wherein,
the annular furnace body includes: the furnace comprises an annular furnace chamber, a vibrating distributor and a discharging machine, wherein the annular furnace chamber consists of an annular furnace wall, a furnace top, a preheating zone, a reducing zone partition wall and a discharging end retaining wall, and a feeding zone, a preheating zone, a reducing zone and a discharging zone which are adjacent in sequence are formed, wherein a smoke outlet is formed in the furnace wall of the preheating zone, smoke in the furnace is discharged from the smoke outlet, dedusted and introduced into the drying tube to serve as a heating source of the preheating zone of the drying tube, the retaining wall is positioned between the preheating zone and the reducing zone, the discharging end retaining wall is positioned between the reducing zone and the discharging zone, the reducing zone forms a semi-closed structure, and the retaining wall both extend downwards from the top wall of the rotary hearth furnace and keep a certain interval with the rotary annular furnace bottom; two ends of the annular hearth are provided with an independent vibrating material distributor for feeding and a discharging machine for discharging, wherein the vibrating material distributor comprises a material distributor main body, a vibrating spring and a vibrating motor;
the thermal system comprises: the device comprises a preheating zone, a plurality of drying pipes and a plurality of burners, wherein an upper layer of drying pipes are arranged above the rotatable annular furnace bottom of the preheating zone, and a lower layer of drying pipes are arranged below the rotatable annular furnace bottom of the preheating zone and are used for heating the preheating zone in a drying pipe mode; the burner is arranged on the side wall of the furnace wall of the reduction region and used for heating the reduction region in a burner mode;
the furnace bottom support and the transmission system are arranged on a base of the reduction zone, which is positioned at the lower part of the rotatable annular furnace bottom, and the base is formed by welding two parallel cylindrical metal bodies at the lower part of the rotatable annular furnace bottom.
2. The rotary hearth furnace according to claim 1, wherein the preheating zone heating temperature is 400 ℃ to 900 ℃.
3. The rotary hearth furnace according to claim 1, wherein the horizontal cross section of the rotary hearth furnace is circular and the included angle of the circular ring of the preheating zone is 30 ° to 100 °.
4. A rotary hearth furnace according to claim 1, characterized in that the charging zone, the preheating zone, the reduction zone and the discharge zone are arranged in succession in the direction of rotation of the rotatable annular hearth.
5. The rotary hearth furnace according to claim 1, wherein a hearth water seal groove for hearth sealing is provided at an outer circumference of a lower surface of said rotatable annular hearth corresponding to said annular furnace wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051733.9U CN206469672U (en) | 2016-09-13 | 2016-09-13 | A kind of double-layer heating rotary hearth furnace for being used to be reduced directly the mode of production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621051733.9U CN206469672U (en) | 2016-09-13 | 2016-09-13 | A kind of double-layer heating rotary hearth furnace for being used to be reduced directly the mode of production |
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| CN206469672U true CN206469672U (en) | 2017-09-05 |
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