CN106222352A - A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace - Google Patents
A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace Download PDFInfo
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- CN106222352A CN106222352A CN201610818965.0A CN201610818965A CN106222352A CN 106222352 A CN106222352 A CN 106222352A CN 201610818965 A CN201610818965 A CN 201610818965A CN 106222352 A CN106222352 A CN 106222352A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
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Abstract
The present invention relates to steel industry and coloured industry uses direct-reduction manufacturing technique method and equipment, belong to field of metallurgy, be specifically related to a kind of monolayer heating for being reduced directly the mode of production and frequency modulation type rotary hearth furnace.This rotary hearth furnace includes annular body of heater, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and drive system；Wherein: described annular body of heater includes: annular furnace, frequency modulation type vibration material distributor and discharging machine；Wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring, vibrating motor, and frequency modulator switchs；Described heat power engineering system includes: multiple drying tubes and multiple burner；Described furnace bottom support and drive system are arranged on the base being positioned at described rotatable ring-shaped furnace bottom bottom of described preheating zone and described reducing zone.This rotary hearth furnace, by setting up frequency modulator in material distributing machine, controls the corresponding feedback signal that mass flow is formed, is automatically adjusted technological process, has that technological process is short, equipment operation rate is high and low power consumption and other advantages.
Description
Technical field
The present invention relates to steel industry and coloured industry uses direct-reduction manufacturing technique method and equipment, belong to metallurgical neck
Territory, is specifically related to a kind of monolayer heating for being reduced directly the mode of production and frequency modulation type rotary hearth furnace.
Background technology
At present, coal-based DR process has multiple, and wherein, owing to rotary hearth furnace reduction technique has, equipment is simple, operation
Easily, with short production cycle, response speed fast, advantages of environment protection, so rotary hearth furnace reduction technique has caused widely
Pay close attention to.The ultimate principle of rotary hearth iron making is that the high temperature of flame is passed by radiation by being positioned at the burning of the flat flame burner of furnace sidewall
To the pelletizing on bed of material surface, the metal-oxide in carbonaceous pelletizing is made at high temperature to be reduced, heating energy source many employings natural gas,
Cracked gas, coke-stove gas, coal gas of converter and coal gas etc., energy sources is quite varied.Use rotary hearth furnace equipment DRI
(DRI) technique mainly comprises the steps that and Iron Ore Powder is mixed homogeneously with reducing agent coal dust, is pressed into carbonaceous pelletizing ore deposit, dries；
Dry carbonaceous pelletizing is layered on rotary hearth furnace equably, make carbonaceous pelletizing reduced zone in rotary hearth furnace (temperature up to
1100 DEG C～1400 DEG C) in be reduced 15min-30min, i.e. can get the metallized pellet that degree of metalization is more than 85%.Turn
End furnace apparatus is for the advantage producing DRI, the transfixion that reduction temperature is high, the time is short, furnace charge is relative with furnace bottom holding,
Thus avoid the problems such as rotary kiln, fluid bed bonding, shaft furnace dross.But use the work that rotary hearth furnace direct-reduction is more ripe at present
Skill mostly is batch mixing, ball processed, is dried etc. and to be distributed into rotary hearth furnace again after pretreatment of raw material, and before rotary hearth furnace reduction, pretreatment process is complicated, disappears
Consuming substantial amounts of manpower and materials and carry out Technological Process Management, have the technological process of production long, equipment investment is big, and production cost is high, energy
Consume high defect, additionally, existing rotary hearth furnace many employings burner formula mode of heating, but owing to cloth mouth is at the annular space of rotary hearth furnace
There is certain difference in height in top and furnace bottom, in material enters stove initial stage stove, Dust Capacity is relatively big, is easily caused cloth mouth near zone and burns
Mouth blocks thus affects production direct motion.The most how to design one automatically control and regulate technological process, equipment operation rate high and
The rotary hearth furnace that energy consumption is low becomes this area and needs badly and solve the technical problem that.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that a kind of monolayer for being reduced directly the mode of production heats and adjusts
Frequently formula rotary hearth furnace, this rotary hearth furnace, by setting up frequency modulator in material distributing machine, automatically controls and regulates technological process, having technique stream
Journey is short, equipment investment is low, equipment operation rate is high and low power consumption and other advantages.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The present invention proposes a kind of monolayer heating for being reduced directly the mode of production and frequency modulation type rotary hearth furnace, and this rotary hearth furnace includes
Annular body of heater, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and drive system；Wherein: described annular body of heater includes: ring
Shape burner hearth, frequency modulation type vibration material distributor and discharging machine, described annular furnace is interval by annular furnace wall, furnace roof, preheating zone and reduction
Partition wall and discharge end barricade are constituted, and form the most adjacent feed zone, preheating zone, reducing zone and discharge zone, wherein, described partition wall
Between described preheating zone and described reducing zone, described discharge end barricade between described reducing zone and described discharge zone,
Described partition wall and described barricade are downwardly extended by the roof of described rotary hearth furnace, and and described rotatable ring-shaped furnace bottom keep certain between
Every；The two ends of described annular furnace are provided with the independent frequency modulation type vibration material distributor for charging and the discharging machine for discharging,
Wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring, vibrating motor and frequency modulator switch；Described heat
Work system includes: multiple drying tubes and multiple burner, and wherein, described drying tube is arranged on being positioned at of described preheating zone and described can turn
On dynamic furnace wall sidewall between ring-shaped furnace bottom and furnace roof, heat for described preheating zone is dried pipe mode, described burner
It is arranged on the furnace wall sidewall of described reducing zone, for described reducing zone being carried out burner mode heating；Described furnace bottom support and
Drive system is arranged on the base being positioned at described rotatable ring-shaped furnace bottom bottom of described preheating zone and described reducing zone.
Inventor finds, this rotary hearth furnace according to embodiments of the present invention all uses furnace wall burner on sidewall with conventional rotary hearth furnace
The mode of heating is compared, and sets up drying tube preheating zone and arrange partition wall in preheating zone and reduction interval in the rotary hearth furnace of the present invention,
Efficiently solve the problem that material enters the stove initial stage and causes burner to block because of powder more；Further, the present invention can use wet block or wet
Ball directly enters the flow processing raw material of rotary hearth furnace, shortens technological process, reduces equipment investment, production cost and produces energy
Consumption；Rotary hearth furnace the most of the present invention can use regenerative combustion technology, can use poor quality or low-rank fuel, reduces fuel
This, can promote with the area lacking natural gas and high-grade fuel at home；Additionally, by setting up frequency modulator in material distributing machine, when
The flow of material is correspondingly formed FM signal, by controlling frequency modulator regulation material feedback signal, reaches to control mass flow
Effect, automatically controls and regulates technological process, cost savings manpower and materials, reaches the effect of auto-control.
According to embodiments of the invention, described preheating zone heating-up temperature is 400 DEG C-1000 DEG C.
According to embodiments of the invention, the horizontal cross-section of described rotary hearth furnace is annular, and described preheating zone annulus angle is
30°-100°。
According to embodiments of the invention, described feed zone, preheating zone, reducing zone and discharge zone are along described rotatable annular furnace
The rotation direction at the end is arranged in order.
According to embodiments of the invention, described drying tube is positioned at described rotatable ring-shaped furnace bottom 1/3 spacing, described between
Away from for the distance between described rotatable ring-shaped furnace bottom and furnace roof.
According to embodiments of the invention, described preheating zone furnace wall is provided with exhaust opening, and inner flue gas of the stove is arranged from described exhaust opening
Go out, for preheated fuel gas combustion air and secondary wind.
According to embodiments of the invention, described rotatable ring-shaped furnace bottom lower surface corresponding with described annular furnace wall outside
At circumference, it is provided with the furnace bottom water sealed tank sealed for furnace bottom.
The present invention at least has the advantages that
1., compared with the mode that conventional rotary hearth furnace all uses furnace wall burner on sidewall to heat, in the rotary hearth furnace of the present invention, set up drying tube
Preheating zone also arranges partition wall in preheating zone and reduction interval, efficiently solves material and enters the stove initial stage and cause burner to block because of powder more
Problem.
2. the present invention can use wet block or wet bulb directly to enter the flow processing raw material of rotary hearth furnace, shortens technological process,
Reduce equipment investment, production cost and energy consumption.
Rotary hearth furnace the most of the present invention can use regenerative combustion technology, can use poor quality or low-rank fuel, reduce fuel
Cost, can promote with the area lacking natural gas and high-grade fuel at home.
4. the present invention is by setting up frequency modulator in material distributing machine, when the flow of material is correspondingly formed FM signal, by control
Frequency modulator processed regulation material feedback signal, reaches to control the effect of mass flow, automatically controls and regulate technological process, greatly
Save manpower and materials, reach the effect of auto-control.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of rotary hearth furnace of the present invention.
Fig. 2 is the sectional schematic diagram of rotary hearth furnace burner hearth of the present invention.
Fig. 3 is the elevational schematic view of rotary hearth furnace of the present invention.
Wherein, feed zone 1, preheating zone 2, reducing zone 3, discharge zone 4, exhaust opening 5, preheating zone and reducing zone division wall 6, go out
Material terminal block wall 7, drying tube 8, burner 9, frequency modulation type vibration material distributor 10, vibrating spring 11, vibrating motor 12, frequency modulator switchs
13, discharging machine 14, furnace roof 15, annular furnace wall 16, furnace bottom water sealed tank 17, material bed 18, rotatable ring-shaped furnace bottom 19, furnace bottom support
And drive system 20, base 21.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that technical scheme, below in conjunction with specific embodiment to this
Invention is described in further detail.The embodiments described below is exemplary, is only used for explaining the present invention, and is not understood that
For limitation of the present invention.
The present invention proposes a kind of monolayer heating for being reduced directly the mode of production and frequency modulation type rotary hearth furnace.According to this
Bright embodiment, Fig. 1 is the schematic top plan view of rotary hearth furnace of the present invention, and Fig. 2 is the sectional schematic diagram of rotary hearth furnace burner hearth of the present invention,
Shown in seeing figures.1.and.2, this rotary hearth furnace includes: annular body of heater, rotatable ring-shaped furnace bottom 19, heat power engineering system and furnace bottom support and
Drive system 20；Wherein: described annular body of heater includes: annular furnace, frequency modulation type vibration material distributor 10 and discharging machine 14, described ring
Shape burner hearth is made up of annular furnace wall 16, furnace roof 15, preheating zone and reducing zone division wall 6 and discharge end barricade 7；Described partition wall and institute
State barricade to be downwardly extended by the roof of described rotary hearth furnace, and keep certain intervals with described rotatable ring-shaped furnace bottom；Described annular
The two ends of burner hearth are provided with the independent frequency modulation type vibration material distributor for charging and the discharging machine for discharging, wherein, described tune
Frequently formula vibration material distributor includes material distributing machine main body, vibrating spring 11, vibrating motor 12 and frequency modulator switch 13；Described heat power engineering system
Including multiple drying tubes 8 and multiple burner 9, wherein, what described drying tube was arranged on described preheating zone is positioned at described rotable ring
On furnace wall sidewall between shape furnace bottom and furnace roof, heating for described preheating zone is dried pipe mode, described burner is arranged
On the furnace wall sidewall of described reducing zone, for described reducing zone being carried out burner mode heating；Described furnace bottom support and transmission
System is arranged on the base 21 being positioned at described rotatable ring-shaped furnace bottom bottom of described preheating zone and described reducing zone.
Inventor finds, this rotary hearth furnace according to embodiments of the present invention all uses furnace wall burner on sidewall with conventional rotary hearth furnace
The mode of heating is compared, and sets up drying tube preheating zone and arrange partition wall in preheating zone and reduction interval in the rotary hearth furnace of the present invention,
Efficiently solve the problem that material enters the stove initial stage and causes burner to block because of powder more；Further, the present invention can use wet block or wet
Ball directly enters the flow processing raw material of rotary hearth furnace, shortens technological process, reduces equipment investment, production cost and produces energy
Consumption；Rotary hearth furnace the most of the present invention can use regenerative combustion technology, can use poor quality or low-rank fuel, reduces fuel
This, can promote with the area lacking natural gas and high-grade fuel at home；Additionally, by setting up frequency modulator in material distributing machine, when
The flow of material is correspondingly formed FM signal, by controlling frequency modulator regulation material feedback signal, reaches to control mass flow
Effect, automatically controls and regulates technological process, cost savings manpower and materials, reaches the effect of auto-control.
According to embodiments of the invention, the concrete kind of the mode of described frequency modulation is unrestricted, can be primary frequency modulation, hands
Dynamic frequency modulation or automatic frequency adjustment, according to some embodiments of the present invention, the present invention is preferably automatic frequency adjustment, described frequency modulation type vibration cloth
Material machine also includes: frequency modulator and frequency modulation switch, by setting up frequency modulator in material distributing machine, when the flow of material is correspondingly formed frequency modulation
Signal, by controlling frequency modulator regulation material feedback signal, reaches to control the effect of mass flow, automatically controls and regulate technique
Flow process, cost savings manpower and materials, reaches the effect of auto-control.
According to embodiments of the invention, Fig. 3 is the elevational schematic view of rotary hearth furnace of the present invention, shown in reference Fig. 3, and described ring
Feed zone 1 the most adjacent in shape burner hearth, heating-up temperature are preheating zone 2, reducing zone 3 and the edge, discharge zone 4 of 400 DEG C-1000 DEG C
The rotation direction of described rotatable ring-shaped furnace bottom is arranged in order, and wherein, described preheating zone and reducing zone division wall are positioned at described pre-
Between hot-zone and described reducing zone, described discharge end barricade is between described reducing zone and described discharge zone, according to the present invention
Embodiment, partition wall is set between preheating zone and reducing zone, can prevent material enter the stove initial stage produce dust enter reducing zone
Impact produces direct motion, and this external discharge end arranges barricade, reducing zone constitutes semi-hermetic structure, can the whole reducing zone of effective guarantee
Reducing atmosphere, improve metal reduction effect.
According to embodiments of the invention, the present invention is by setting up drying tube preheating zone in rotary hearth furnace, and this drying tube is arranged
In at the bottom of rotatable stove with furnace roof spacing furnace wall sidewall at furnace bottom 1/3, drying tube is arranged away from furnace bottom material the most closely will be affected in stove
Convective Heating effect, poor and bigger close to furnace roof heat loss away from the too remote radiant heat transfer effect of material；Use heat radiation mode pre-
Hot charge, compared with the mode that conventional rotary hearth furnace all uses furnace wall burner on sidewall to heat, efficiently solve material enter the stove initial stage by
There is certain difference in height at the annular space top of rotary hearth furnace with furnace bottom in frequency modulation type vibration material distributor, material enters stove initial stage stove
Interior Dust Capacity is compared with the problem of great Yi blocking burner, and drying tube heating-up temperature is 400 DEG C-1000 DEG C, can carry out pre-to mixed material
Heat, and effectively remove the table water in stove material and water of crystallization, on the premise of not affecting product index can direct wet block or
Wet bulb enters stove, decreases the pressure ball before rotary hearth furnace and pelletizing stoving process, shortens technological process, reduce equipment investment,
There is the advantages such as handling process is short, equipment investment is low, equipment operation rate is high, energy consumption is low, have wide range of applications.
Concrete material according to embodiments of the invention, described preheating zone and reducing zone division wall is unrestricted, if energy
Enough play the effect of separation, can be refractory brick or fire-resistant stamp mass etc., according to some embodiments of the present invention, the present invention
It is preferably refractory brick.
According to embodiments of the invention, the concrete material of described discharge end barricade is unrestricted, as long as stop can be played
Effect, can be refractory brick or fire-resistant stamp mass etc., according to some embodiments of the present invention, the present invention is the most fire-resistant
Brick.During work, material is arranged in rotary hearth furnace by the frequency modulation type vibration material distributor 10 of rotary hearth furnace charging zone 1 by material uniformly
The end formation bed of material 18, drives furnace bottom to rotate by furnace bottom drive system 20, and the pre-furnace bottom of material is without relative motion, along with furnace bottom
Rotating and sequentially pass through preheating zone 2, reducing zone 3 in burner hearth, by setting up drying tube preheating zone in stove, preheating zone annulus angle is
30 °-100 °, use Electric heating, the temperature of heating is 400 DEG C-1000 DEG C, can effectively remove the table water in stove material and
Water of crystallization also reduces carbon scaling loss in material；By setting up frequency modulator in material distributing machine, when the flow of material is correspondingly formed frequency modulation letter
Number, by controlling frequency modulator regulation material feedback signal, reaching to control the effect of mass flow, reducing zone uses outboard sidewalls to store
Hot type burner mode of heating, can use poor quality or low-rank fuel, reduces fuel cost, improves material reduction effect, reduction
Rotary hearth furnace discharged by material by the reducing material of the rear generation discharging machine 14 through rotary hearth furnace discharge zone 4, and inner flue gas of the stove is from exhaust opening 5
Discharging, the gas-fired combustion-supporting wind needed for rotary hearth furnace and secondary wind are preheated by fume afterheat recycling, the gas-fired combustion-supporting after preheating
Wind and secondary wind are connected to the heater of rotary hearth furnace by pipeline.
According to embodiments of the invention, the concrete shape of the horizontal cross-section of described rotary hearth furnace is unrestricted, according to the present invention
Some embodiments, the present invention is preferably annular, and described preheating zone annulus angle is preferably 30 °-100 °, rotary hearth furnace of the present invention
Drying tube preheating zone annulus angle is no less than 30 °, if annulus angle is less than 30 °, then material is the shortest at preheating zone remaining time,
Can cause material moisture removing not exclusively, in reducing zone, removing affects material district reproducibility to residual moisture, reduces valuable metal
Percent reduction, but affect the reduction effect of reducing zone material when rotary hearth furnace preheating zone annulus angle crosses senior general, so controlling preheating zone
Annulus angle is not more than 100 °.
According to embodiments of the invention, described drying tube is positioned at described rotatable ring-shaped furnace bottom 1/3 spacing, described between
Unrestricted away from concrete number and the shape for the distance between described rotatable ring-shaped furnace bottom and furnace roof, described drying tube and burner
System, as long as the effect of dry heat can be played, wherein, the shape of described drying tube can be p-shaped, W shape or U-shaped, root
According to some embodiments of the present invention, drying tube of the present invention is the most U-shaped, and the concrete mode of heating of described drying tube is unrestricted,
According to some embodiments of the present invention, the present invention be preferably electrical heating, gas heating, high-temperature flue gas waste heat one or more.
According to embodiments of the invention, described preheating zone furnace wall is provided with exhaust opening 5, and inner flue gas of the stove is arranged from described exhaust opening
Go out, for preheated fuel gas combustion air and secondary wind.
According to embodiments of the invention, the particular make-up component of described furnace bottom support and drive system is unrestricted, as long as
Can play and support and the effect of transmission, the tricks of furnace bottom support of the present invention and drive system is preferably 2-4 set, point
It is not arranged on the base of described rotatable ring-shaped furnace bottom bottom.
According to embodiments of the invention, the concrete kind of the base of described rotatable ring-shaped furnace bottom is unrestricted, if energy
Enough playing the effect of support, according to some embodiments of the present invention, currently preferred base is the circle parallel by two
Post row metal body is formed by being welded on the bottom of described rotatable ring-shaped furnace bottom.
According to embodiments of the invention, described rotatable ring-shaped furnace bottom lower surface corresponding with described annular furnace wall outside
At circumference, it is provided with the furnace bottom water sealed tank 17 sealed for furnace bottom.
Embodiment 1: as shown in Figure 1, Figure 2 and Figure 3, a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type
Rotary hearth furnace, a diameter of 40m-60m of this rotary hearth furnace；During work, the material frequency modulation type vibration material distributor by rotary hearth furnace charging zone 1
Material is arranged in the rotary furnace bottom formation bed of material 18, by setting up frequency modulator in material distributing machine, when material by 10 uniformly
Flow is correspondingly formed FM signal, by controlling frequency modulator regulation material feedback signal, reaches to control the effect of mass flow, logical
Crossing furnace bottom drive system 20 drives furnace bottom to rotate, the pre-furnace bottom of material without relative motion, along with the rotation of furnace bottom in burner hearth successively
Through preheating zone 2, reducing zone 3, by setting up drying tube preheating zone in stove, preheating zone annulus angle is 30 °, use electrical heating side
Formula, the temperature of heating is 800 DEG C-1000 DEG C table water that can effectively remove in stove material and water of crystallization and reduces carbon in material and burn
Damage；Reducing zone uses outboard sidewalls heat-accumulating burner mode of heating, can use poor quality or low-rank fuel, reduces fuel
This, improve material reduction effect, and material is discharged by the reducing material generated after the reduction discharging machine 14 through rotary hearth furnace discharge zone 4
Rotary hearth furnace, inner flue gas of the stove discharges from exhaust opening 5, and the gas-fired combustion-supporting wind needed for rotary hearth furnace and secondary wind are entered by fume afterheat recycling
Row preheating, gas-fired combustion-supporting wind and secondary wind after preheating are connected to the heater of rotary hearth furnace by pipeline.
Embodiment 2: as shown in Figure 1, Figure 2 and Figure 3, a kind of monolayer for being reduced directly the mode of production heats and frequency modulation
Formula rotary hearth furnace, a diameter of 40m-60m of this rotary hearth furnace, during work, the material frequency modulation type vibration cloth by rotary hearth furnace charging zone 1
Material is arranged in the rotary furnace bottom formation bed of material 18 by machine 10 uniformly, by setting up frequency modulator in material distributing machine, works as material
Flow be correspondingly formed FM signal, by control frequency modulator regulation material feedback signal, reach control mass flow effect,
Driving furnace bottom to rotate by furnace bottom drive system 20, the pre-furnace bottom of material is without relative motion, along with the rotation of furnace bottom depends in burner hearth
Secondary through preheating zone 2, reducing zone 3, by setting up drying tube preheating zone in stove, preheating zone annulus angle is 60 °, use combustion gas combustion
Burning mode of heating, the temperature of heating is 600 DEG C-1000 DEG C table water that can effectively remove in stove material and water of crystallization and reduces thing
Carbon scaling loss in material；Reducing zone uses outboard sidewalls heat-accumulating burner mode of heating, can use poor quality or low-rank fuel, reduce
Fuel cost, improves material reduction effect, and the reducing material generated after the reduction discharging machine 14 through rotary hearth furnace discharge zone 4 is by thing
Rotary hearth furnace discharged by material, and inner flue gas of the stove is discharged from exhaust opening 5, and fume afterheat recycling is by the gas-fired combustion-supporting wind and two needed for rotary hearth furnace
Secondary wind preheats, and gas-fired combustion-supporting wind and secondary wind after preheating are connected to the heater of rotary hearth furnace by pipeline.
Embodiment 3: as shown in Figure 1, Figure 2 and Figure 3, a kind of monolayer for being reduced directly the mode of production heats and frequency modulation type
Rotary hearth furnace, a diameter of 40m-60m of this rotary hearth furnace；During work, the material frequency modulation type vibration material distributor by rotary hearth furnace charging zone 1
Material is arranged in the rotary furnace bottom formation bed of material 18, by setting up frequency modulator in material distributing machine, when material by 10 uniformly
Flow is correspondingly formed FM signal, by controlling frequency modulator regulation material feedback signal, reaches to control the effect of mass flow, logical
Crossing furnace bottom drive system 20 drives furnace bottom to rotate, the pre-furnace bottom of material without relative motion, along with the rotation of furnace bottom in burner hearth successively
Through preheating zone 2, reducing zone 3, by setting up drying tube preheating zone in stove, preheating zone annulus angle is 100 °, use combustion gas combustion
Burning mode of heating, the temperature of heating is 400 DEG C-1000 DEG C table water that can effectively remove in stove material and water of crystallization and reduces thing
Carbon scaling loss in material；Reducing zone uses outboard sidewalls heat-accumulating burner mode of heating, can use poor quality or low-rank fuel, reduce
Fuel cost, improves material reduction effect, and the reducing material generated after the reduction discharging machine 14 through rotary hearth furnace discharge zone 4 is by thing
Rotary hearth furnace discharged by material, and inner flue gas of the stove is discharged from exhaust opening 5, and fume afterheat recycling is by the gas-fired combustion-supporting wind and two needed for rotary hearth furnace
Secondary wind preheats, and gas-fired combustion-supporting wind and secondary wind after preheating are connected to the heater of rotary hearth furnace by pipeline.
Inventor finds, this rotary hearth furnace according to embodiments of the present invention all uses furnace wall burner on sidewall with conventional rotary hearth furnace
The mode of heating is compared, and sets up drying tube preheating zone and arrange partition wall in preheating zone and reduction interval in the rotary hearth furnace of the present invention,
Efficiently solve the problem that material enters the stove initial stage and causes burner to block because of powder more；Further, the present invention can use wet block or wet
Ball directly enters the flow processing raw material of rotary hearth furnace, shortens technological process, reduces equipment investment, production cost and produces energy
Consumption；Rotary hearth furnace the most of the present invention can use regenerative combustion technology, can use poor quality or low-rank fuel, reduces fuel
This, can promote with the area lacking natural gas and high-grade fuel at home；Additionally, by setting up frequency modulator in material distributing machine, when
The flow of material is correspondingly formed FM signal, by controlling frequency modulator regulation material feedback signal, reaches to control mass flow
Effect, automatically controls and regulates technological process, cost savings manpower and materials, reaches the effect of auto-control.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include one or more this feature.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to concrete feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the technology of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification, simultaneously for one of ordinary skill in the art, according to the think of of the application
Think, the most all will change.
Claims (7)
1. one kind is heated and frequency modulation type rotary hearth furnace for being reduced directly the monolayer of the mode of production, it is characterised in that include annular furnace
Body, rotatable ring-shaped furnace bottom, heat power engineering system and furnace bottom support and drive system；Wherein:
Described annular body of heater includes: annular furnace, frequency modulation type vibration material distributor and discharging machine, described annular furnace is by annular furnace
Wall, furnace roof, preheating zone and reducing zone division wall and discharge end barricade are constituted, and form the most adjacent feed zone, preheating zone, reduction
District and discharge zone, wherein, described partition wall is between described preheating zone and described reducing zone, and described discharge end barricade is positioned at described
Between reducing zone and described discharge zone, described partition wall and described barricade are downwardly extended by the roof of described rotary hearth furnace, and with described
Rotatable ring-shaped furnace bottom keeps certain intervals；The two ends of described annular furnace are provided with the independent frequency modulation type vibration cloth for charging
Material machine and the discharging machine for discharging, wherein, described frequency modulation type vibration material distributor includes material distributing machine main body, vibrating spring, vibration
Motor, frequency modulator switchs；
Described heat power engineering system includes: multiple drying tubes and multiple burner, and wherein, described drying tube is arranged on the position of described preheating zone
On furnace wall sidewall between described rotatable ring-shaped furnace bottom and furnace roof, add for described preheating zone is dried pipe mode
Heat, described burner is arranged on the furnace wall sidewall of described reducing zone, for described reducing zone carries out burner mode heating；
What described furnace bottom support and drive system were arranged on described preheating zone and described reducing zone is positioned at described rotatable annular furnace
On the base of bottom.
Rotary hearth furnace the most according to claim 1, it is characterised in that described preheating zone heating-up temperature is 400 DEG C-1000 DEG C.
Rotary hearth furnace the most according to claim 1, it is characterised in that the horizontal cross-section of described rotary hearth furnace is annular, described
Preheating zone annulus angle is 30 °-100 °.
Rotary hearth furnace the most according to claim 1, it is characterised in that described feed zone, preheating zone, reducing zone and edge, discharge zone
The rotation direction of described rotatable ring-shaped furnace bottom is arranged in order.
Rotary hearth furnace the most according to claim 1, it is characterised in that described drying tube is positioned at away from described rotatable ring-shaped furnace bottom
At 1/3 spacing, described spacing is the distance between described rotatable ring-shaped furnace bottom and furnace roof.
Rotary hearth furnace the most according to claim 1, it is characterised in that described preheating zone furnace wall is provided with exhaust opening, cigarette in stove
Gas is discharged from described exhaust opening, for preheated fuel gas combustion air and secondary wind.
Rotary hearth furnace the most according to claim 1, it is characterised in that at described rotatable ring-shaped furnace bottom lower surface with described
At the excircle that annular furnace wall is corresponding, it is provided with the furnace bottom water sealed tank sealed for furnace bottom.
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Application publication date: 20161214 |