CN106369994A - Rotary kiln fluidization roasting device and process - Google Patents
Rotary kiln fluidization roasting device and process Download PDFInfo
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- CN106369994A CN106369994A CN201610982966.9A CN201610982966A CN106369994A CN 106369994 A CN106369994 A CN 106369994A CN 201610982966 A CN201610982966 A CN 201610982966A CN 106369994 A CN106369994 A CN 106369994A
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- rotary kiln
- air
- kiln
- kiln body
- pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/12—Rotary-drum furnaces, i.e. horizontal or slightly inclined tiltable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/34—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
- F27B7/362—Introducing gas into the drum axially or through the wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
- F27B7/362—Introducing gas into the drum axially or through the wall
- F27B2007/367—Introducing gas into the drum axially or through the wall transversally through the wall of the drum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/03—Calcining
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a rotary kiln fluidization roasting device and process. The rotary kiln fluidization roasting device comprises a rotary kiln body, a total air sleeve and an air blower which are sequentially communicated, the total air sleeve is connected to the outer wall of an intermediate temperate section of the rotary kiln body in a sleeving manner, and the air blower is arranged on the exterior of the total air sleeve. An air spraying device is communicated between the rotary kiln body and the total air sleeve and is arranged inside the rotary kiln body. A using method of the rotary kiln fluidization roasting device includes the following steps of burdening, feeding, rotary kiln starting, roasting or burning, smoke collecting, kiln slag collecting, smoke treatment and kiln slag treatment. Compared with the prior art, the air blower blows air to the interior of the rotary kiln body, and therefore the oxygen content of air in the rotary kiln body is increased; meanwhile, materials are stirred, so that the contact areas between the materials and the air are increased, and the ingredients of pulverized coal are reduced; and the rotary kiln fluidization roasting device and process have the beneficial effects of being high in using rate, high in volatilization efficiency of volatile matter, good in refining effect, low in energy consumption and low in smelting cost.
Description
Technical field
The present invention relates to metallurgical technology field, specifically, it is rotary kiln fluosolids roasting device and roasting technique.
Background technology
It is a kind of long 32-50m, the cylinder of a diameter of 1800-3500mm that rotary kiln is rotation firing, has and connects successively
Logical kiln tail, kiln body and kiln hood, kiln hood is the output section of rotary kiln, and kiln tail is the feeding part of rotary kiln, coal dust, natural gas
Send in rotary kiln Deng fuel from kiln hood, the mineral being mixed with reducing agents such as coal dusts are added in rotary kiln by kiln tail, kiln body
It is followed successively by low-temperature zone, middle-temperature section and high temperature section from kiln tail to kiln hood, rotary kiln is horizontal to be arranged on the support roller of 3-5 group and carry out
Support, realizes gyration by gear-wheel gear-ring transmission, and rotary kiln is 3-5% with the inclination angle on ground, and kiln tail is high, kiln hood
Low.Non-ferrous metal metallurgy of the prior art, chemical industry and other industry are all come to mineral since the dawn of human civilization using this rotary kiln
Carry out roasting and calcining, the greatest problem of this traditional rotary kiln is material in the kiln kinestate in kiln is half to roll
Dynamic state, is made mineral fully can not be contacted with oxygen, coke powder or coal dust can not be made fully to contact to produce with oxygen
Reducing gas co simultaneously makes co fully burn, and leads to the reduction effect of mineral poor, nor make harmful volatile metal and
Nonmetallic being fully contacted with oxygen leads to volatility low, and must allocate weight in material into than for 40-45% even during dispensing
It is 50% coke powder or coal dust dusting coal and blast roasting in kiln hood, cause energy waste, therefore this is non-ferrous metal metallurgy
The technical barrier of industry, is also in the high technical barrier of other industry heat utilization efficiency low energy consumption using rotary kiln.Now need one kind
The contact area of mineral and oxygen can be improved, using the teaching of the invention it is possible to provide sufficient oxygen, reduce coal dust or coke powder dispensing proportion, and can
Be motion in rotary kiln for the mineral be in roll or flow regime, with reach make volatile matter evaporation rate faster, roasting more thorough,
Improve refining effect, reducing energy consumption, the smelting cost that reduces, the purpose of raising Business Economic Benefit.
Content of the invention
It is an object of the invention to designing rotary kiln fluosolids roasting device and roasting technique, there is heat utilization efficiency height,
Volatile matter volatilization efficiency high, refining effect is good, the low advantage of energy consumption, smelting cost.
The present invention is achieved through the following technical solutions:
Rotary kiln fluosolids roasting device, including the revolution kiln body being sequentially communicated, total windband and aerator, described total windband
It is socketed on the outer wall of described revolution kiln body, described aerator is arranged on the outside of described total windband.Air is passed through by aerator
Total windband is blown into the inside of revolution kiln body, improves the oxygen content in rotary kiln body, thus improving the anti-of portion in rotary kiln body
Answer efficiency, and when the blast blasting is sufficiently strong, just the material in portion in described rotary kiln body can be blown and must stir,
Material and the contact area of air are increased, improves the reaction efficiency of material.
Further to better implement the present invention, following setting structures are especially adopted: also include being arranged on described revolution
Air jet system within kiln body, described air jet system is connected with described total windband.The gases at high pressure sent from aerator pass through total
Windband enters into air jet system, then is ejected into portion in rotary kiln body from air jet system, is conducive to guiding gas in rotary kiln body
The corresponding position in portion, and spray.
Further to better implement the present invention, following setting structures are especially adopted: described air jet system is included at least
One jet house steward, described jet house steward is connected with described total windband.Further, described air jet system also includes air intake
Pipe, described jet house steward is connected by blast pipe with total windband.Further, the two ends of described jet house steward are close by plug
Envelope, and offer, on described jet house steward, the fumarole that in multiple and described rotary kiln body, portion connects, described jet house steward's
Length is 5-15m, and the material of described jet house steward is 2520 type rustless steels.When described rotary kiln rotates, jet house steward except
Jet can also carry out a stirring action to material, make material obtain an effect preferably stirred, further increase
Material and the contact area of air, improve the roasting effect of material.2520 type rustless steels are resistant in rotary kiln body
High temperature, enables jet house steward more durable.
Further to better implement the present invention, following setting structures are especially adopted: described jet house steward is along described time
The inwall of rotary kiln body is angularly disposed.When in described rotary kiln body equipped with material, described jet house steward can extend in material,
And angularly disposed jet house steward with described revolution kiln body rotate during, its front end first with rotary kiln body in material
Contact, its rear end is contacted with material and relatively lags behind so that the turning over materials of jet house steward helically formula, improves the effect of stirring
Really, so that material is more fully contacted with air and can be fully contacted with hot-air, improve heat utilization efficiency and reduce energy
Consumption, improves the volatilization efficiency of volatile matter, thus improve the effect of material refining.
Further to better implement the present invention, following setting structures are especially adopted: on the inwall of described revolution kiln body
It is equipped with refractory material.Further, the thickness of described refractory material is 200-250mm, and described blast pipe runs through described resistance to
Fiery material is simultaneously connected with described total windband.
Further to better implement the present invention, following setting structures are especially adopted: described refractory material is refractory brick.
Further to better implement the present invention, following setting structures are especially adopted: described total windband includes two phases
Air-casing back-up ring to setting and the air heater baskets being arranged between air-casing back-up ring, described air heater baskets can be with described revolution
Kiln body relatively rotates；Described air heater baskets include air heater baskets pipe, the both ends of the surface of described air heater baskets pipe respectively with institute
State air-casing back-up ring to offset；Described air-casing back-up ring is socketed on the outer wall of described revolution kiln body, and described air heater baskets pipe can be with
Described rotary kiln body relatively rotates, and described air heater baskets pipe is connected with described aerator.Further, described air-casing back-up ring
It is fixedly connected on the outer wall of described revolution kiln body, and can be relative sliding between described air heater baskets pipe and described air-casing back-up ring
Dynamic, the connect band between described air heater baskets pipe and described air-casing back-up ring forms sealing so that when described revolution kiln body rotates,
Described air heater baskets pipe can not rotate with revolution kiln body so that the connection of aerator and described air heater baskets pipe and sealing
Can be realized with simplest structure.
Further to better implement the present invention, following setting structures are especially adopted: described air heater baskets pipe and institute
State, between revolution kiln body, there is gap.Described air heater baskets are avoided to make to occur therewith to rub in described revolution kiln body rotation and increase
Plus abrasion each other.
Further to better implement the present invention, following setting structures are especially adopted: deviate from institute in described air-casing back-up ring
The one side stating air heater baskets pipe is provided with triangle gusset.Described triangle gusset increased described air-casing back-up ring and described rotary kiln
Bonding strength between body, improves the robustness of total windband.
Further to better implement the present invention, following setting structures are especially adopted: described air heater baskets also include
Two heating muff baffle plate circles being respectively fixedly connected with the two ends of described air heater baskets pipe, described heating muff baffle plate circle with
Described air-casing back-up ring offsets.Described heating mantle baffle plate circle is increased with respect to the air heater baskets pipe being offseted with described air-casing back-up ring
With the contact area of described air-casing back-up ring, improve the effect of sealing.
Further to better implement the present invention, following setting structures are especially adopted: described air heater baskets also include
The semi-circular inner panel being arranged on the inner ring of described air heater baskets pipe and being connected with described heating muff baffle plate circle, described inner panel
It is arranged on the top of described air heater baskets pipe.Described inner panel space segment corresponding with described air heater baskets and described revolution
The inner barrier of kiln body comes, and makes to enter into the gas in the described air heater baskets pipe space corresponding with inner panel by aerator
Can only move to be not provided with described inner panel space enter back into revolution kiln body inside；Because revolution kiln body will carry out same
The gyration in direction is so that the material in described rotary kiln body turns round the one of kiln body mainly by described in motor process
Side is simultaneously semicircular arc, is formed and has a material and state that another side is not expected, if not in the side setting not having material
Plate, then will there is the empty wind of the race do not expected and reduce the situation that kiln temperature leads to thermal loss；Therefore inner panel
Setting improves heat utilization efficiency, has saved the energy, has reduced energy consumption and cost.
Further to better implement the present invention, following setting structures are especially adopted: described inner panel and described rotary kiln
Gap between the outer wall of body is 20-30mm.
Further to better implement the present invention, following setting structures are especially adopted: described aerator and described air
Heating muff passes through soft pipe connection.Described flexible pipe can offset the relative displacement between aerator and air heater baskets pipe, can
Improve the connection reliability between described aerator and described air heater baskets pipe.
Further to better implement the present invention, following setting structures are especially adopted: also include and described air heats
Telescopic joint support, described support includes four settings steady rest column on the ground, and described steady rest column uniformly divides
Cloth, in the both sides of described air heater baskets pipe, is provided between the steady rest column positioned at described air heater baskets pipe the same side
Guide rail, the axis of described guide rail and the described diameter parallel turning round kiln body；It is respectively arranged with air on described air heater baskets pipe
It is right that heating muff air inlet pipe and windband spindle tube, described air heater baskets pipe air inlet pipe and described windband spindle tube are separately positioned on
In the guide rail answered；The free end of described air heater baskets pipe air inlet pipe and described soft pipe connection.Described air heater baskets can be
Move along the axis direction of described revolution kiln body in the presence of described guide rail, when described revolution kiln body rotates, described air adds
Hot jacket does not rotate with revolution kiln body.
Further to better implement the present invention, especially adopt following setting structures: described air heater baskets with described
It is provided with air-casing sealing ring between air-casing back-up ring.Described air-casing sealing ring is clamped in described air-casing back-up ring and described heating mantle baffle plate
Between circle.Air-casing sealing ring improves the sealing property between described air heater baskets and described air-casing back-up ring, improves total wind
Blast in set, thus improve the stream pressure that jet house steward sprayed so that material can be reversed more abundant, carry
High refining effect.
Further to better implement the present invention, following setting structures are especially adopted: described rotary kiln fluosolids roasting
Device also includes secondary seal circle, and the inner ring of described secondary seal circle is close to the outer ring of described heating muff baffle plate circle, and described two
The one side of secondary sealing ring is close to described air-casing back-up ring；Also include secondary seal circle pressing plate, described secondary seal circle is arranged on institute
State between air-casing back-up ring and described secondary seal circle pressing plate, between described secondary seal circle pressing plate and described air-casing back-up ring, pass through spiral shell
Described secondary seal circle is compressed by nail.Improve the sealing property of total windband, efficiently solve described air heater baskets with described
Air Leakage between air-casing back-up ring.
Further to better implement the present invention, following setting structures are especially adopted: described total windband is socketed in described
The middle-temperature section of revolution kiln body.
Further to better implement the present invention, following setting structures are especially adopted: described jet house steward and described time
It is fixedly connected with multiple column tubes between the inwall of rotary kiln body.Further, described column tube run through described refractory material with
The inwall of described revolution kiln body is fixedly connected；The setting of described column tube improve described jet house steward with described revolution kiln body it
Between connective stability so that described jet house steward overturn material when be not susceptible to deform or damage.
Based on above-mentioned rotary kiln fluosolids roasting device, present invention also offers roasting technique, comprise the following steps:
Step s1: dispensing: starting mineral to be refined when mineral refined by rotary kiln with adjuvant by certain weight ratio
Carry out dispensing, and mix homogeneously, thus obtaining material to be refined；
Step s2: start rotary kiln: before adding described material, first described rotary kiln fluosolids roasting device is started
Prerun is it is ensured that run without exception；
Step s3: charging: after described rotary kiln fluosolids roasting plant running is steadily without exception, by described material from kiln tail
The calcining matter charge pipe at place is added to the low-temperature zone in described revolution kiln body；
Step s4: roasting or calcining: described revolution kiln body constantly rotates, make described material in described rotary kiln body successively
Moved to kiln hood by low-temperature zone, middle-temperature section and high temperature section, spray into heating material at kiln hood makes continuously to rise in rotary kiln body simultaneously
Mineral are carried out roasting by temperature, so that volatile matter is evaporated from mineral in the form of ash-laden gas；And described material is in revolution
During the middle-temperature section of kiln body, aerator makes described material be in that flow regime is transported to kiln hood by total windband to air blast in rotary kiln body
Dynamic；
Step s5: collect cigarette, dirt: described volatile matter moves to kiln tail and draws described rotary kiln by air-introduced machine from kiln tail
It is collected through bag collection in vivo；
Step s6: collect kiln slag: the mineral formation kiln slag not evaporated in gaseous form, described kiln slag moves to kiln
Through reclaiming after head；
Step s7: process cigarette, dirt: volatile matter after bag collection collection, collect after sedimentation by the flue dust containing metal
Or sold；And remaining volatile matter is processed through waste gas purification, process up to standard after discharge；
Step s8: process kiln slag: the kiln slag of collection is carried out smelting and obtains the pig iron, the tailings obtaining after smelting is sent into
Cement plant.
Further, the percentage by weight that described adjuvant accounts for material is 4-25%.Account for thing compared to adjuvant in prior art
The percentage by weight of material is 10-50%, therefore, when roasting or calcining identical mineral, decreases making of the adjuvant of more than half
Consumption, reduces energy consumption, reduces production cost.
Further, in step s1, described adjuvant is coal dust or coke powder.
Further, in step s4, described heating material is one or more of coal dust, coal gas or natural gas.
The present invention compared with prior art, has advantages below and a beneficial effect:
(1), in the present invention, aerator can be by total windband to air blast in the middle-temperature section of revolution kiln body, the air energy blasting
Enough material is stirred, and more oxygen can be provided, so that material is more fully connect with the oxygen of in the air and steam
Touch；
(2), in the present invention, jet house steward sprays air to material and carries out spiral when turning round kiln body rotation to material
The upset of formula so that material be in while flow regime can more fully with air and hot air impingement, improve heat utilization
Rate, thus reducing energy consumption, smelting cost, and improves the volatilization efficiency of volatile matter, improves the metallurgical effect of material.
(3) in the present invention, reduce the proportioning of coal dust or coke powder, reduce energy consumption, improve economic benefit.
Brief description
Fig. 1 is the structural representation of rotary kiln fluosolids roasting device；
Fig. 2 is the schematic cross-section of rotary kiln fluosolids roasting device；
Fig. 3 is the structural representation of the air jet system of rotary kiln fluosolids roasting device；
Fig. 4 is the enlarged drawing of a part in Fig. 1；
Fig. 5 is the roasting technique flow chart based on rotary kiln fluosolids roasting device；
Wherein, 1- jet house steward, 2- blast pipe, 3- air-casing back-up ring, 4- air heater baskets pipe, 5- air heater baskets pipe air inlet
Pipe, 6- windband spindle tube, 7- steady rest column, 8- guide rail, 9- heating muff baffle plate circle, 10- air-casing sealing ring, 11- flexible pipe,
12- column tube, 13- inner panel, 14- secondary seal circle, 15- secondary seal circle pressing plate, 16- triangle gusset.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment 1:
Rotary kiln fluosolids roasting device, has heat utilization efficiency height, volatile matter volatilization efficiency high, refining effect is good, energy consumption,
The low advantage of smelting cost, as shown in Figure 1, Figure 2, Figure 3, Figure 4, is specifically arranged to following structures: include the revolution being sequentially communicated
Kiln body, total windband and aerator, described total windband is socketed on the outer wall of described revolution kiln body, and described aerator is arranged on described
The outside of total windband.Wherein, described revolution kiln body wherein temperature section medium position circumferentially direction offer multiple a diameter of
The through hole of 70mm, described total windband is connected with the inside of described revolution kiln body by described through hole.
Wherein, described total windband includes two air-casing back-up rings 3 and the air heater baskets being clamped between air-casing back-up ring 3；Institute
State air heater baskets and include air heater baskets pipe 4 and two heating mantle baffle plate circles 9, heating mantle baffle plate circle 9 is welded on air heating
The two ends of sleeve pipe 4, and the dead in line of the axis of heating mantle baffle plate circle 9 and air heater baskets pipe 4, outside heating mantle baffle plate circle 9
Side is concordant with the lateral surface of air heater baskets pipe 4, and the difference of the internal-and external diameter of heating mantle baffle plate circle 9 is more than air heater baskets pipe 4
The difference of internal-and external diameter；Air-casing back-up ring 3 is spaced the middle part of the middle-temperature section being welded on described revolution kiln body successively, described air heater baskets
The dead in line of axis, air-casing back-up ring 3 and described revolution kiln body, is provided with 10mm between heating mantle baffle plate circle 9 and air-casing back-up ring 3
Thick air-casing sealing ring 10, the lateral surface of air heater baskets pipe 4 is socketed with the thick secondary seal circle 14 of 10mm, secondary seal circle 14
And between secondary seal circle 14 is clipped in by air-casing back-up ring 3, the free end of secondary seal circle 14 is additionally provided with secondary seal circle pressing plate
15, secondary seal circle pressing plate 15 passes through bolt and air-casing back-up ring 3 and fastens and by the top of heating mantle baffle plate circle 9 and secondary seal circle
14 compressions.
Wherein, between the two ends of described total windband and described revolution kiln body, circumferentially direction uniform welding has multiple triangle muscle
Plate 16, the particular number of triangle gusset 16 selects according to actual service condition, to ensure that described total windband can be firm
It is fixed in described revolution kiln body.
Wherein, the lateral wall of described air heater baskets pipe 4 is respectively welded air heater baskets pipe air inlet pipe 5 and windband main shaft
Pipe 6, air heater baskets pipe 5 connection aerator and air heater baskets pipe 4, air heater baskets 5 and windband spindle tube 6 company of slip respectively
It is connected in guide rail 8, guide rail 8 is fixedly connected on the steady rest column 7 being arranged at ground；Wherein, the track of guide rail 8 with described time
The diameter parallel of rotary kiln body, air heater baskets pipe 4 can move forward and backward along guide rail, and guide rail 8 makes the air heater baskets pipe 4 can not be around
The axis of its own rotates, and therefore when described revolution kiln body rotates, air heating muff 4 does not rotate with described revolution kiln body.
Wherein, between air heater baskets pipe 4 and described revolution kiln body, there is gap, this gap forms described total windband and institute
State the gas passage between revolution kiln body, enable to described revolution kiln body and air heater baskets when relatively rotating, also can lead to
Cross the inside that the gas that aerator enters in total windband smoothly enters into revolution kiln body, and also it can be avoided that air heater baskets 4
The abrasion occurring therewith to rub when described revolution kiln body rotates and increasing each other.
Embodiment 2:
The present embodiment is to optimize further on the basis of above-described embodiment, further to better implement the present invention,
As shown in Fig. 2 especially adopting following setting structures: be communicated with one between described aerator and air heater baskets pipe air inlet pipe 5 soft
Pipe 11.Because rotary kiln operationally can move to kiln hood because of the gravity of itself, air heater baskets pipe 4 also same time shift can be driven simultaneously
Dynamic, this makes the position between the air heater baskets pipe air inlet pipe 5 being welded on air heater baskets pipe 4 and described aerator is not
Stop conversion, flexible pipe 11 can offset the relative displacement between aerator and air heater baskets pipe air inlet pipe 5, it is possible to increase described
Connection reliability between aerator and described air heater baskets pipe 4.
Embodiment 3:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, and further is preferably to realize this
Bright, as shown in Figure 1, Figure 2, Figure 3, Figure 4, especially adopt following setting structures: be internally provided with jet in described revolution kiln body
Device, described air jet system includes the jet house steward 1 of multiple oblique layings of wall along along described rotary kiln body, in jet house steward 1
Portion is fixed by the inwall of blast pipe 2 and described revolution kiln body, and blast pipe 2 and air heater baskets pipe 4 are with described revolution kiln body
Between formed gap connection；Wherein, the fumarole of multiple a diameter of 5mm is offered along its axis direction on jet house steward 1,
Because being selected according to actual service condition, the two ends of described jet house steward 1 are carried out the particular number of fumarole by plug closure
Seal so that spray into the inside of described revolution kiln body by described fumarole by the gas that blast pipe 2 enters jet house steward 1,
Improve the pressure of the gas spraying in described rotary kiln body, so that material is preferably overturn.
Wherein, the length of described jet house steward 1 is 5-15m, preferably 10m, and described jet house steward 1 is a diameter of 60mm,
The a length of 10m of steel pipe, material is the stainless straight tube of 2520 types.
Wherein, it is equipped with the thick refractory brick of 200mm-250mm, fire resisting in jet house steward 1 and described rotary kiln body between wall
The thickness of brick should select according to specific service condition, and refractory brick is laid on the inwall of described revolution kiln body, jet house steward 1
Spacing 140mm and described refractory brick between.Blast pipe 2 is run through described refractory brick and is connected with described total windband.
Wherein, it is fixedly connected with multiple column tubes 12 between the inwall of jet house steward 1 and described revolution kiln body.Column tube 12
The inwall running through described refractory brick with described revolution kiln body is fixedly connected.
Embodiment 4:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, and further is preferably to realize this
Bright, as shown in Figure 1, Figure 2, Figure 3, Figure 4, especially adopt following setting structures: described air heater baskets also include being arranged on air
The inner ring of heating muff 4 the semi-circular inner panel 13 being connected with heating muff baffle plate circle 9；Wherein, inner panel 13 is arranged on air
The top of heating muff 4.Inner panel 13 space segment corresponding with air heater baskets 4 is opened with the described inner barrier turning round kiln body
Come, so that the gas entering into air heater baskets pipe 4 space corresponding with inner panel 13 by aerator can only be first moved to does not have
The space of setting inner panel 13 enters back into the inside of described revolution kiln body；Because revolution kiln body will carry out unidirectional revolution fortune
Move so that the material in described rotary kiln body turns round one side of kiln body and in semi arch mainly by described in motor process
Shape, forms and has a material and state that another side is not expected, if not having the side setting inner panel 13 of material, then will
Exist not have expect while run sky wind and reduce the situation that kiln temperature leads to thermal loss；The setting of therefore inner panel 13 improves
Heat utilization efficiency, has saved the energy, reduces energy consumption and cost.
Wherein, the gap between the outer wall of described inner panel 13 and described revolution kiln body is 20-30mm, the concrete numerical value in gap
Should be determined according to actual service condition and installation situation.
During use, start rotary kiln, around its axis rotation under the engaged transmission of gear-wheel gear-ring, air heats revolution kiln body
Set makes air heater baskets not rotate with the rotation of revolution kiln body by the effect of guide rail 8 and steady rest column 7, air blast
Wind is sequentially sent between flexible pipe 11, air heater baskets pipe air inlet pipe 5, air heater baskets pipe 4 and the external wall of described rotary kiln machine
Gap in, the inside of blast pipe 2, jet house steward 1 and described revolution kiln body, the gas being sprayed by the fumarole of jet house steward 1
The bottom flowing to material blasts substantial amounts of band oxygen air, and meanwhile, the revolution kiln body of rotation makes to be arranged on wall in rotary kiln body
Jet house steward 1 constantly turning over materials in a spiral manner, so that material is fully contacted with air, and then occur sufficiently to react.
Embodiment 5
Based on the rotary kiln fluosolids roasting device in any of the above-described embodiment, present embodiments provide roasting technique, first
The mineral first treating roasting add adjuvant dispensing, then put into the mineral that dispensing completes in revolution kiln body and carry out roasting, finally
Product after roasting or calcining is processed, specifically includes following steps:
Step s1: dispensing: starting mineral to be refined when mineral refined by rotary kiln with adjuvant by certain weight ratio
Carry out dispensing, and mix homogeneously, thus obtaining material to be refined；
Step s2: start rotary kiln: before adding described material, first described rotary kiln fluosolids roasting device is started
Prerun is it is ensured that run without exception；
Step s3: charging: after described rotary kiln fluosolids roasting plant running is steadily without exception, by described material from kiln tail
The calcining matter charge pipe at place is added to the low-temperature zone in described revolution kiln body；
Step s4: roasting or calcining: described revolution kiln body constantly rotates, make described material in described rotary kiln body successively
Moved to kiln hood by low-temperature zone, middle-temperature section and high temperature section, spray into heating material at kiln hood makes continuously to rise in rotary kiln body simultaneously
Mineral are carried out roasting by temperature, so that volatile matter is evaporated from mineral in the form of ash-laden gas；And described material is in revolution
During the middle-temperature section of kiln body, aerator makes described material be in that flow regime is transported to kiln hood by total windband to air blast in rotary kiln body
Move, and make described material and be fully contacted reaction with the oxygen of the abundance spraying into.Aerator blasts revolution kiln body by air jet system
The temperature that internal a large amount of oxygen can improve middle-temperature section is higher, improves the reaction efficiency of material, improves volatility, thus
Improve the rate of roasting of material.Further, Roots blower selected by described aerator, and air quantity is 35-60m3/ min, air blast
Pressure is 29.8kpa.
Step s5: collect cigarette, dirt: described volatile matter moves to kiln tail and draws described rotary kiln by air-introduced machine from kiln tail
It is collected through bag collection in vivo；
Step s6: collect kiln slag: the mineral formation kiln slag not evaporated in gaseous form, described kiln slag moves to kiln
Through reclaiming after head；
Step s7: process cigarette, dirt: volatile matter after bag collection collection, collect after sedimentation by the flue dust containing metal
Or sold；And remaining volatile matter is processed through waste gas purification, process up to standard after discharge；
Step s8: process kiln slag: the kiln slag of collection is carried out smelting and obtains the pig iron, the tailings obtaining after smelting is sent into
Cement plant.
Wherein, the percentage by weight that described adjuvant accounts for material is 4-25%.It can be seen that, account for thing compared to adjuvant in prior art
When the 10-50% of material weight, roasting or calcining identical mineral, decrease the usage amount of the adjuvant of more than half, therefore, reduce
Energy consumption, reduces production cost.
Wherein, in step s1, described adjuvant is coal dust or coke powder.
Wherein, in step s4, described material is subject to the air blast of described air jet system and turns over when turning round the middle-temperature section of kiln body
Material acts on, and makes described material move to kiln hood in flow regime, and make described material to be fully contacted with the oxygen of the abundance spraying into
Reaction.The temperature enabling to middle-temperature section is higher, improves the reaction efficiency of material, improves volatility, thus improve thing
The rate of roasting of material.Wherein, Roots blower selected by aerator, is 35-60m according to actual service condition air quantity3/ min, drum
Wind pressure is 29.8kpa.
Wherein, in step s4, described heating material is one or more of coal dust, coal gas or natural gas.
Complete step s1 to step s8, just complete the calcination process to mineral, whole technique can reduce energy consumption, carry
The effect of high roasting efficiency.
The above, be only presently preferred embodiments of the present invention, and not the present invention is done with any pro forma restriction, every according to
Any simple modification above example made according to the technical spirit of the present invention, equivalent variations, each fall within the protection of the present invention
Within the scope of.
Claims (10)
1. rotary kiln fluosolids roasting device it is characterised in that: include the revolution kiln body, total windband and the aerator that are sequentially communicated,
Described total windband is socketed on the outer wall of middle-temperature section of described revolution kiln body, and described aerator is arranged on the outer of described total windband
Portion.
2. rotary kiln fluosolids roasting device according to claim 1 it is characterised in that: also include being arranged on described revolution
Air jet system within kiln body, described air jet system is connected with described total windband.
3. rotary kiln fluosolids roasting device according to claim 2 it is characterised in that: described air jet system is included at least
One jet house steward (1), described jet house steward (1) is connected with described total windband.
4. according to the rotary kiln fluosolids roasting device described in claim 1 or 2 or 3 it is characterised in that: described total windband includes two
The individual air-casing back-up ring (3) being oppositely arranged and the air heater baskets being arranged between air-casing back-up ring (3), described air heater baskets can
Relatively rotate with described rotary kiln body；Described air heater baskets include air heater baskets pipe (4), described air heater baskets pipe (4)
Both ends of the surface offset with described air-casing back-up ring (3) respectively；Described air-casing back-up ring (3) is socketed on the outer wall of described revolution kiln body,
Described air heater baskets pipe (4) can be relatively rotated with described rotary kiln body, described air heater baskets pipe (4) and described aerator
Connection.
5. rotary kiln fluosolids roasting device according to claim 4 it is characterised in that: described air heater baskets also include
Two heating muffs baffle plate circle (9) being respectively fixedly connected with the two ends in described air heater baskets pipe (4), described heating muff gear
Plate circle (9) is offseted with described air-casing back-up ring (3).
6. rotary kiln fluosolids roasting device according to claim 5 it is characterised in that: described aerator and described air
Heating muff (4) passes through flexible pipe (11) and connects.
7. the roasting technique based on the rotary kiln fluosolids roasting device according to any one of claim 1-6, its feature exists
In comprising the following steps:
Step s1: dispensing: when starting rotary kiln refining mineral, mineral to be refined and adjuvant are carried out dispensing, and mix all
Even, thus obtaining material to be refined；
Step s2: start rotary kiln: before adding described material, first carry out starting pre- fortune by described rotary kiln fluosolids roasting device
Row is it is ensured that run without exception；
Step s3: charging: after described rotary kiln fluosolids roasting plant running is steadily without exception, by described material at kiln tail
Calcining matter charge pipe is added to the low-temperature zone in described revolution kiln body；
Step s4: roasting or calcining: described revolution kiln body continuously rotates, makes described material pass sequentially through in described rotary kiln body
Low-temperature zone, middle-temperature section and high temperature section are moved to kiln hood, and spray into heating material at kiln hood makes continuous warming in rotary kiln body simultaneously, right
Mineral carry out roasting, so that volatile matter is evaporated from mineral in the form of ash-laden gas；And described material is in revolution kiln body
Middle-temperature section when, aerator makes described material move to kiln hood in flow regime by total windband to air blast in rotary kiln body；
Step s5: collect cigarette, dirt: described volatile matter is moved to kiln tail and drawn in described rotary kiln body from kiln tail by air-introduced machine
It is collected through bag collection；
Step s6: collect kiln slag: the mineral formation kiln slag not evaporated in gaseous form, after described kiln slag moves to kiln hood
Through reclaiming.
8. rotary kiln fluosolids roasting device according to claim 7 and roasting technique it is characterised in that: described adjuvant accounts for
The percentage by weight of material is 4-25%.
9. rotary kiln fluosolids roasting device according to claim 7 and roasting technique it is characterised in that: in step s1,
Described adjuvant is coal dust or coke powder.
10. rotary kiln fluosolids roasting device according to claim 7 and roasting technique it is characterised in that: in step s4,
Described heating material is at least one in coal dust, coal gas or natural gas.
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| CN201610982966.9A CN106369994B (en) | 2016-10-28 | 2016-10-28 | Rotary kiln fluosolids roasting device and roasting technique |
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| CN201610982966.9A CN106369994B (en) | 2016-10-28 | 2016-10-28 | Rotary kiln fluosolids roasting device and roasting technique |
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| CN111926136A (en) * | 2020-07-09 | 2020-11-13 | 钢铁研究总院 | Rotary kiln for directly reducing iron-containing materials |
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| CN106369994B (en) | 2019-02-15 |
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