CN2071317U - Outer heating rotary kiln for magnetic material sintering - Google Patents
Outer heating rotary kiln for magnetic material sintering Download PDFInfo
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- CN2071317U CN2071317U CN 89205275 CN89205275U CN2071317U CN 2071317 U CN2071317 U CN 2071317U CN 89205275 CN89205275 CN 89205275 CN 89205275 U CN89205275 U CN 89205275U CN 2071317 U CN2071317 U CN 2071317U
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Abstract
The utility model relates to an external heating type rotary kiln for sintering magnetic materials, which is suitable for presintering magnetic ferrite and sintering iron oxide. The rotary kiln is characterized in that a high-temperature carrier of materials is a rotary tube which is made of heat-resisting alloy steel. A span between two supporting points is 5 to 7 meters, and a working speed is 0.5 to 10 circles per minute. The horizontal inclination angle of the rotary kiln is 0 to 5 DEG which is the same as the horizontal inclination angle of the rotary tube. The maximum furnace temperature is 1150 DEG C. Material feeding adopts a screw feeder of which the screw shaft is supported by a suspension arm and a mandrel is a step type non-uniform shaft. Dust prevention adopts a labyrinth type hard-contact dust preventing structure. The connection of an exhaust interface adopts a flange type articulated structure. The material feeding and outgoing ends of the rotary tube are respectively provided with the structures of screw blade tubes.
Description
The utility model is a kind of external-heating rotary kiln that is used for the magnetic material sintering, is specially adapted to the presintering of magnetic ferrites materials, and this rotary kiln also is the ideal equipment of iron oxide sintering oxidation.
The presintering of magnetic ferrites materials requires to be sintered material (powdery or granular) and constantly rolls in being subjected to thermal process, it is heated evenly, the uniformity of sintering oxidation degree will be got well, and requirement simultaneously is sintered material and furnace lining material, heating source completely cut off, thereby make it not contaminated.Normally used pushed bat kiln or tunnel cave are packed material in the container (higher temperature carrier) into, and material is carried by the kiln thermal treatment zone with container and is sintered oxidation, is subjected to the pollution of refractory material and heating source simultaneously, so sintering quality is difficult to improve.
In order to address this problem, common way is that the higher temperature carrier with material is designed to revolving body, relies on the rotation of revolving body and inclination to make material constantly roll and flow through the kiln thermal treatment zone and be sintered oxidation in the chamber within it.U.S. Pat 3,170,786 have introduced a kind of internal heat type rotary kiln, it has a revolving body, but its revolving body is made of with refractory material inner lining of steel pipe, and heating source is chamber heating within it directly, material within it the chamber by the time be subjected to the pollution of heating source and refractory material.
Main purpose of the present utility model provides a kind of improved magnetic material sintering rotary kiln, and it has an improved revolving body, and its inner chamber does not serve as a contrast with refractory material, from its external heat, can satisfy the presintering requirement of magnetic ferrites materials.
The technical solution of the utility model is: revolving body is to select heat-resisting alloy steel manufacturing for use, is called return bend; Return bend passes kiln body burner hearth and it is installed with (center) axis; Screw(-type) feeder, gas extraction system, return bend supporting arrangement, water cooling plant and discharge end seal bootr are to stretch out on the frame before and after benchmark is installed in the kiln body respectively with the return bend axis; Knocking device is housed on the section of stretching out before return bend; Rotary kiln is bearing on the cement flooring by front stall and back seat, and lowering or hoisting gear is arranged on the front stall, and its height is regulated by lowering or hoisting gear, greater than the back seat height, makes rotary kiln become the low level inclination that can regulate continuously in high back before 0 °～5 ° with ground; The level inclination of return bend is identical with rotary kiln; Return bend is by the two supporting arrangements supporting of stretching out before and after the kiln body on the frame, and span is 5～7 meters between two supporting-points; Return bend has axially stop block, and it can not be moved axially, but allows its thermal expansion elongation; Return bend drives via a speed-changing driving device, and working speed is 0.5～10 rev/min, can regulate continuously; Electrical heating elements is equipped with in kiln body burner hearth bottom surface and left and right side; The material feeding end of screw(-type) feeder stretches in the return bend feed end mouth of pipe; Gas extraction system is made up of feed end seal bootr, exhaust port device, air door and chimney.
Rotary kiln is worked under air atmosphere.Return bend is from its external heat by the electrical heating elements in burner hearth.Material is sent in the return bend by screw(-type) feeder, relies on the rotation and the inclination of return bend, carries and is sintered oxidation by the thermal treatment zone, discharges from discharge end seal bootr end opening.The cooling water of water cooling plant makes material quicken cooling before discharging opening is discharged.The gas that produces in the sintering is by the chimney sucking-off, and air door can be regulated the gas extraction system negative pressure, and air is constantly entered in the return bend from discharging opening, provides material (product) sintering oxidation required air.
Be divided into 3～5 thermals treatment zone in the utility model rotary kiln burner hearth, each thermal treatment zone furnace temperature is controlled and is regulated via temperature-controlling system by the requirement of material sintering process.Also have manual emergency driving device on the rotary kiln, when breaking down or have a power failure, use.
Return bend is that the trade mark of selecting for use China to produce is that 3Cr24Ni7SiNRE or ZG4Cr25Ni20Si2 heat-resisting alloy steel are made, and can bear 1150 ℃ of temperature, can be transmitted to its inner chamber effectively from the heat energy of its external heat material is heated.
The heat-resisting alloy steel material that above-mentioned return bend is selected for use is made the high-temperature component of kiln through being usually used in industries such as petrochemical industry, powder metallurgy, service condition generally is: corrosive environment is serious, but avoid bigger stressed load, therefore, last destruction generally shows as the corrosion failure form.Above-mentioned material still has oxidation and corrosion performance preferably 1100～1200 ℃ of uses, and therefore, the return bend that is used to make the utility model rotary kiln is out of question.But return bend parts carry span is 5～7 meters, is heated to 1150 ℃, and its stage casing can be because material load effect generation plastic bending distortion in deadweight and the pipe.The heat-resisting alloy steel material of domestic production does not also have the precedent of use like this.How to make the return bend parts in the work fault that the time do not occur bending and deformation, keeping long-term the normal operation is problem to be solved in the utility model.
Analyze return bend diastrophic mechanism under hot condition, and find through experimental study: return bend is in the amount of deflection that occurs bending and deformation in the supporting span under the hot condition, but when it gyrates in certain range of speeds, its flexural deformation constantly produces, constantly recover again, be in dynamic steady state, be stabilized in some deflection value scopes, the fault that do not occur bending and deformation can keep normal operation.In order to address this problem, sum up The prototype test results, the design of return bend should meet the following requirements: the supporting span of (1) return bend and the ratio of its internal diameter are less than 20; (2) working speed of return bend is at 0.5～10 rev/min, must make in time by hand when no matter furnace temperature has a power failure during greater than 300 ℃ or break down that emergency driving device is rotated further it, do not allow stall; (3) material (weight) distributes the scope (Figure 14) that meets the following formula requirement in return bend cantilever segment and the supporting span:
(G1L1+G2L2)/(GL)=0.08～0.14 in the formula:
G1, G2--are respectively return bend front and back cantilever segment material weight;
(O1 among Figure 14 was O2) to the supporting-point distance for the cantilever segment center of gravity before and after L1, L2--were respectively return bend;
The G--return bend is material weight in the supporting span;
Span between L--return bend two supporting-points.
Screw(-type) feeder has the helical axis of a cantilever support, it is made of mandrel and thread, and its end bearing is on two bearings, and stretching into the other end in the carrier pipe has thread but do not have supporting structure, mandrel is the staged non-uniform shaft, and promptly its cross section diminishes along mass transport direction staged.Because helical axis is a cantilever support, so the cantilever end that stretches in the return bend has been avoided the effect of interior 400～500 ℃ of temperature of the mouth of pipe to supporting structure.Because the mandrel cross section reduces along the mass transport direction, material channel between itself and the isodiametric carrier pipe is diffusion type, material remains relaxed state in course of conveying, avoid being extruded obstruction, so the screw feeder function is operate as normal in certain range of speeds, realizes the control and the adjusting of different feeding coals.
Respectively there is a labyrinth type to contact dustproof construction firmly on feed end seal bootr and the discharge end seal bootr, it has a fixed ring to be fixed on the seal bootr opening, fixed ring has one or two cannelure, and groove is embedded in a rotating ring, and rotating ring forms with groove and allows its radially movable labyrinth gap to cooperate.Constitute movingly between rotating ring and the return bend.This structure has following effect:
(1), be again movingly between itself and the return bend, so the rotation of return bend, circular runout (being caused by foozle and thermal deformation) and axial elongation (being caused by thermal expansion) are unaffected because rotating ring is can be radially movable;
(2) since between rotating ring and the return bend gap less, its with fixed ring between be again labyrinth gap, therefore can keep the gas channel of the interior non-strict hermetic seal requirement of seal bootr, can prevent the effusion of material dust in the air-flow again.
It is suitable for reading that exhaust port device in the gas extraction system is contained in the feed end seal bootr, and it is suitable for reading that chimney is contained in the exhaust port device.Row's interface arrangement is connected to form by adapter, transition conduit, mouthpiece.Take over the feed end seal bootr between, between transition conduit and the adapter, between mouthpiece and the transition conduit, between chimney and the mouthpiece respectively by moving flange and deciding flange and be connected, every pair of moving flange and decide to have between the flange 4 attachment screws, the corresponding aperture that each screw connects is a screw on a flange, is the curved waist circular hole on another flange.The every pair of moving flange and decide flange and interconnect fixing position and can in the arc length scope of oval hole, rotate 20 °～60 ° angles.This syndeton between the gas extraction system each several part is called the flange form articulation structure, and it is adjusted chimney for the user installs convenience is provided when needs are adjusted the rotary kiln inclination angle.
A spiral leaf tubular construction is housed respectively in the return bend feed end and the discharge end mouth of pipe, it has a core pipe, the plurality of sector helical blade divides into groups be staggered on the core pipe, be that blade is arranged by equidistant grouping at the core tube axis direction, every group has 2～4 blades to arrange symmetrically along circumference that in cross-section of core pipe the adjacent set blade is an interlaced arrangement at circumferencial direction.The support arm and the return bend of this spiral leaf tubular construction are connected and fixed, and leave the gap that assembly technology needs between blade external diameter and the return bend internal diameter.The core pipe of feed end spiral leaf tubular construction is by 4～8 taeniaes and 2～4 uniform pitch thread shape structures that helical stand is formed.The wall thickness straight tubes such as core Guan Shi of discharge end spiral leaf tubular construction, drawing on its external cylindrical surface has 2～4 equal pitch thread lines.The sector shaped helical blade by above-mentioned grouping be staggered requirement along the helical stand of (with) core pipe or threaded line (on) be welded, every group of blade number is identical with helical stand number or screw thread the end of a thread number.θ=K(360 ° at the fan angle (projected angle) of blade/n), K=0.6 in the formula～0.8, n is helical stand number or screw thread the end of a thread number.Spiral leaf tubular construction rotates together in company with return bend during work, and it has following effect:
(1) because the core pipe of feed end spiral leaf tubular construction is to be made of taeniae and helical stand, and material enters core Guan Houneng from screw(-type) feeder and flows to the return bend inwall smoothly, so the core pipe does not influence the material input;
(2) return bend is the isodiametric straight tube of inwall, its level inclination is very little, usually 2 °～3 ° uses, near level, material is at first piled up in the mouth of pipe after entering return bend, and its piling height is easy to surpass mouth of pipe lower edge and produces backflow, inlet amount is big more, pile up highly more, it is serious more to reflux, and is called " charging obstacle ".From the sintering functional analysis of rotary kiln, if not because this " charging obstacle ", its production capacity also has big potentiality, and then potentiality are bigger to be used for the iron oxide sintering.Feed end spiral leaf tubular construction overcomes " charging obstacle " because the interaction energy of its blade stops feed back effectively, improves rotary kiln productivity ratio;
(3) return bend except the effect of blade screw face makes material can smooth delivery of power enter the thermal treatment zone at feed end because it tilts also, can quicken successfully to discharge from discharging opening at discharge end when rotating;
(4) because the sector shaped helical blade is the grouping interlaced arrangement on the core pipe, so it neither influences air communication mistake in the return bend, has avoided the thermal radiation energy loss of the return bend thermal treatment zone to the two ends mouth of pipe again.
Spiral leaf tubular construction makes material form as shown in figure 15 feed status in return bend, and A is feed end drying materials district, and B is material high-temperature oxydation district, and C is the discharge end cooling zone, in return bend (6) A section and C section spiral leaf tubular construction is housed respectively.Arrow (1) expression charging, arrow (2) expression discharging.Material (25) in the flowing velocity of B section is
In the V2=2K*n*d*tg β following formula
N--return bend rotating speed;
D--return bend internal diameter;
β--kiln level inclination;
K--material characteristic coefficient, relevant with factor such as Flow of Goods and Materials performance, can determine by test.
At feed end (A) and discharge end (C) because the effect of spiral leaf tubular construction, can so that
V1＞＞V2, V3＞V2 is wherein
V1, V2, V3--are respectively the flowing velocity of material in A, B, C section.
According to flow principles such as each cross sections, then have
In V1S1=V2S2=V3S3=Q/ γ=constant following formula
S1, S2, S3--are respectively material at A, B, the shared sectional area of C section;
Q--is equivalent to the feeding coal of screw(-type) feeder at the weight of material that each section of return bend passed through in the unit interval;
γ--material apparent specific gravity (gd).
So S1＜＜S2, S3＜S2.
This shows that feed end solid accumulation height obviously reduces, overcome " charging obstacle ", the discharge end material can be discharged smoothly.
Each knocking device has one-period to knock the steel ball of return bend, can prevent the growth of the sticking parietal layer of return bend inner surface material dust.
Technique scheme can realize main purpose of the present utility model: (1) is because revolving body is a return bend of selecting for use heat-resisting alloy steel to make, its inner chamber does not serve as a contrast with refractory material, from its external heat, therefore, material chamber within it is not subjected to the pollution of refractory material and heating source; (2) because the rotation of return bend and inclination are constantly rolled material and flowed in pipe, so material is heated evenly, the uniformity of sintering oxidation degree is better.
Several parts that the utility model technique scheme provides or structure can realize providing assurance for overall technological scheme perfectly.The analysis-by-synthesis the technical solution of the utility model has following advantage as can be seen:
(1) revolving body of internal heat type rotary kiln is actual is exactly the kiln body, and the revolving body of the utility model external-heating rotary kiln is heat-resisting alloy steel pipe (return bend), therefore design, installation and the working service of this rotary kiln (comprising transmission system) are more convenient, its not rotational structure (particularly furnace lining) be not easy to damage.
(2) heating of return bend is an external-heat, and material is carried in pipe, and is isolated fully with heating element heater and furnace lining, and is therefore not contaminated.Heating element heater and furnace lining are not subjected to material collision and friction simultaneously, and also airless washes away, and therefore help improving its reliability and service life.
(3) owing to the rotation and the inclination of return bend, material constantly rolls in pipe and flows, so this rotary kiln and pushed bat kiln and tunnel cave comparison, material sintering oxidation high conformity, and the course of reaction time is short, has both saved energy consumption, can boost productivity again.
(4) auxiliary members such as saggar (container), push pedal and kiln car in pushed bat kiln and the tunnel cave are heated in company with material and cool off, and the heat that they consume is more than the heat of supplies consumption.And this rotary kiln does not have in company with the heated auxiliary member of material, so the thermal energy consumption index is lower.
(5) because thermal radiation energy loss in the return bend has been avoided in the effect of spiral leaf tubular construction, both save energy consumption, improved the stability of furnace again.
(6) as can be seen, its structure has complete logistics and gas channel, is sealing and semiclosed duty, has therefore reduced the pollution of material dust to working environment by technical solutions of the utility model.Simultaneously material enter, carry and discharge is the process of working continuously, therefore accomplish automation control easily.
(7) find out that from above-listed (3), (4), (5) bar this rotary kiln has energy-conservation advantage.Add up after tested, this rotary kiln is used for about 0.9 degree of magnetic ferrites materials presintering per kilogram material power consumption, and with about 2.5 degree of tunnel cave presintering per kilogram material power consumption, so the per unit area yield economize on electricity is more than 60%.
Fig. 1 is a magnetic material sintering external-heating rotary kiln general structure sketch.
Fig. 2 is a kiln body drawing in side sectional elevation.
Fig. 3 is the screw(-type) feeder structure chart.
Fig. 4 is the figure of screw feeder machine mandrel.
Fig. 5 is exhaust system structure figure.
Fig. 6 is Flange Plane figure.
Fig. 7 decides Flange Plane figure.
Fig. 8 is that labyrinth type contacts the dustproof construction profile firmly.
Fig. 9 is a feed end spiral leaf tubular construction profilograph.
Figure 10 is a feed end spiral leaf tubular construction drawing in side sectional elevation.
Figure 11 is a discharge end spiral leaf tubular construction profilograph.
Figure 12 is a discharge end spiral leaf tubular construction drawing in side sectional elevation.
Figure 13 is the knocking device profile.
Figure 14 is that return bend component materials weight is distributed schematic diagram vertically.
Figure 15 material is the feed status schematic diagram in return bend.
The magnetic material sintering external-heating rotary kiln that Fig. 1 represents comprises return bend parts (6), it passes the burner hearth of kiln body (7) and it is with the installation of (center) axis, screw(-type) feeder (13), gas extraction system, supporting arrangement (15) and (19) of return bend (6), water cooling plant (10) and seal bootr (12) are to be that stretch out on the frame (not drawing among the figure) front and back that benchmark is installed in kiln body (7) with return bend (6) axis, the feed end of return bend (6) also is equipped with knocking device (5), forward seat of this rotary kiln (16) and back seat (18) are bearing on the cement flooring, become the low level inclination in high back before 0 °～5 ° with ground, it is regulated by the lowering or hoisting gear (not drawing in detail among the figure) on the front stall (16), and the level inclination of return bend (6) is identical with it.Return bend (6) drives via a speed-changing driving device (not drawing among the figure), and working speed is 0.5～10 rev/min.Fig. 2 is the profile of kiln body (7), it is made up of outer cover of steel plate (not drawing among the figure) and furnace lining (24), burner hearth bottom surface and left and right sides face are equipped with electrical heating elements (9), and top cover (23) is arranged for the ease of the installation and removal of return bend (6) and electrical heating elements (9).
Material enters return bend (6) from screw(-type) feeder (13), because the rotation (22) of return bend (6) and inclination, material (25) constantly rolls in pipe and flows, direction along logistics (17) is sintered oxidation by the thermal treatment zone, discharge (20) from discharge end seal bootr (12) end opening then, the cooling water (11) of water cooling plant (10) is discharged it and is quickened cooling before.
Return bend (6) is to combine through machining, segmentation welding with the spun pipe of heat-resisting alloy steel.The heat-resisting alloy steel material maximum operation (service) temperature of selecting for use is 1200 ℃, belongs to anti-oxidant non-scaling steel.The maximum operation (service) temperature of the utility model regulation return bend parts (6) is 1150 ℃, and its structural design satisfies the requirement in the technique scheme.Therefore, return bend (6) when it is heated to 1100～1150 ℃ as long as in 0.5～10 rev/min of the working speed fault that just can not occur bending and deformation that gyrates.
The helical axis of screw(-type) feeder (13) (see figure 3) is made up of mandrel (30) and thread (31), its front end is bearing on two bearings (26), there is the other end that stretches in the carrier pipe (32) of thread (31) not support, mandrel (30) is a staged non-uniform shaft (see figure 4), L is the length that mandrel (30) is equipped with thread (31) part, d1＞d2＞... dm, L1=L2=... Lm, the integer of m desirable 2～4.Arrow among Fig. 1 (1) expression material enters the hopper (29) of screw(-type) feeder (13) from preceding working procedure, and material flows into carrier pipe (32) from hopper (29), then since the rotation of helical axis and the effect of thread (31) helicoid be fed forward.Mandrel (30) front end is equipped with sprocket wheel (27), and it is driven by speed-changing driving device (not drawing among the figure) helical axis is rotated.Seal (28) prevents that material from overflowing from carrier pipe (32) front opening.
Fig. 5 is a gas extraction system, and it is made up of feed end seal bootr (4), exhaust port device and chimney (40), and air door (3) is contained on the exhaust port device.The gas that material (25) produces in the sintering in return bend (6) ［ air-flow (8) ］ is by chimney (40) sucking-off, form exhaust airstream (2), air door (3) can be regulated the gas extraction system negative pressure, air (21) is constantly entered in the return bend (6) from discharging opening, provide material (25) sintering oxidation required air.Some material dust is collected (14) from seal bootr (4) end opening (44) sedimentation in the exhaust airstream (2).
Feed end seal bootr (4) (Fig. 5) has a labyrinth type to contact dustproof construction (34) firmly respectively with discharge end seal bootr (12) with the opening part (33) of return bend (6) combination, the ring (45) of deciding of its (see figure 8) is fixed on seal bootr (4) or (12), fixed ring (45) has one or two cannelure, each groove is embedded in a rotating ring (46), and rotating ring (46) forms with groove and allows its radially movable labyrinth gap to cooperate.Each size (see figure 8) relation of this dustproof construction (34) is: d1 and d are for movingly, and fit clearance is less than 0.5 millimeter; End maximum radial jerk value when d2-d1＞D2-D1＞return bend (6) rotates.
It is suitable for reading that the exhaust port device is contained in feed end seal bootr (4), and it is suitable for reading that chimney (40) is contained in the exhaust port device.The exhaust port device is formed (Fig. 5) by taking over (35), transition conduit (36) and mouthpiece (39).Take between (35) and the transition conduit (36), all be by moving flange (38) and decide flange (37) and be connected between mouthpiece (39) and the transition conduit (36), between adapter (35) and the seal bootr (4), all be between chimney (40) and the mouthpiece (39) by moving flange (43) and deciding flange (41) and be connected.Every pair of moving flange and decide to have between the flange 4 attachment screws (not drawing among the figure), the corresponding aperture that each screw connects is a screw on a flange, is the curved waist circular hole on another flange.Moving flange (38) has three oval holes and a screw (Fig. 6), and deciding flange (37) has an oval hole and three screws (Fig. 7), and moving flange (43) has four oval holes, and deciding flange (41) has four screws.
A spiral leaf tubular construction (Fig. 9 is housed respectively in return bend (6) feed end and the discharge end mouth of pipe, Figure 11), it has a core pipe, grouping be staggered plurality of sector helical blade (47) or (51) on the core pipe, be that arrange by equidistantly dividing into groups at the core tube axis direction blade (47) or (51), every group of blade (47) or (51) arrange symmetrically along circumference that at a section of core pipe adjacent set blade (47) or (51) are staggered at circumferencial direction.The uniform pitch thread shape structure that the core pipe of feed end spiral leaf tubular construction is made up of 6 taeniaes (48) and 3 helical stands (49) among Fig. 9, every group has 3 blades (47) (see figure 10); The core pipe (50) of discharge end spiral leaf tubular construction is to wait the wall thickness straight tube among Figure 11, every group has 2 blades (51) (seeing Figure 12), for the convenience that blade (51) is arranged, drawing on the external cylindrical surface of core pipe (50) has 2 equal pitch thread lines (not drawing among the figure).
Figure 13 has adorned four knocking devices (5) on return bend (6), each knocking device (5) has a casket (52), the stiff end of casket (52) on return bend (6) is opening, and the other end has a cross bar (55), places a steel ball (54) in the casket (52).At return bend (6) during along the rotation of the direction of arrow (56), steel ball (54) breaks away from cross bar (55) immediately after arriving the extreme higher position support vertically (53) falls and knocks return bend (6), and the sticking parietal layer of return bend (6) inner surface material dust is come off.
Claims (15)
1, a kind of external-heating rotary kiln that is used for the magnetic material sintering, this rotary kiln has a return bend (6), it passes the burner hearth of kiln body (7) and it is with the installation of (center) axis, screw(-type) feeder (13), gas extraction system, supporting arrangement (15) and (19) of return bend (6), water cooling plant (10) and discharge end seal bootr (12) are to be that stretch out on the frame front and back that benchmark is installed in kiln body (7) respectively with return bend (6) axis, the section of stretching out is equipped with knocking device (5) before return bend (6), this rotary kiln is bearing on the cement flooring by front stall (16) and back seat (18), front stall (16) has lowering or hoisting gear, and this rotary kiln is characterised in that its revolving body is the return bend made from heat-resisting alloy steel; The height of front stall (16) is regulated by its lowering or hoisting gear, and its height makes rotary kiln become 0 °～5 ° the low level inclination in preceding high back with ground greater than the height of back seat (18); The level inclination of return bend (6) is identical with rotary kiln; The span of return bend (6) between its supporting arrangement (15) and (19) is 5～7 meters; Kiln body (7) is made up of outer cover of steel plate, furnace lining (24) and top cover (23), in the bottom surface and the left and right side of its burner hearth electrical heating elements (9) is housed; One end of screw(-type) feeder (13) stretches in return bend (6) the feed end mouth of pipe; Gas extraction system is made up of feed end seal bootr (4), exhaust port device, air door (3) and chimney (40); Respectively there is a labyrinth type to contact dustproof construction (34) firmly on feed end seal bootr (4) and the discharge end seal bootr (12); Each knocking device (5) has one-period to knock the steel ball (54) of return bend (6).
2,, it is characterized in that the trade mark that return bend (6) selects for use China to produce is that 3Cr24Ni7SiNRE or ZG4Cr25Ni20Si2 heat-resisting alloy steel are made according to the described rotary kiln of claim 1.
3, according to the described rotary kiln of claim 1, the ratio that it is characterized in that the supporting span of return bend (6) and its internal diameter is less than 20.
4,, it is characterized in that the cantilever segment of return bend (6) and the interior material (weight) of supporting span distribute the scope that meets the following formula requirement according to the described rotary kiln of claim 1:
(G1L1+G2L2)/(GL)=0.08～0.14 the meaning that illustrates in each parameter meaning and the specification in the formula is identical.
5, according to the described rotary kiln of claim 1, it is characterized in that return bend (6) is connected with a speed-changing driving device, working speed is 0.5～10 rev/min.
6, according to the described rotary kiln of claim 1, it is characterized in that screw(-type) feeder (13) has a carrier pipe (32), there is a rotating helical axis its inside, and helical axis is made up of mandrel (30) and thread (31).
7, according to claim 1 and 6 described rotary kilns, it is characterized in that the helical axis front end of cantilever support is bearing on two bearings (26), the other end that stretches in the carrier pipe (32) is not established supporting structure; Mandrel (30) is the staged non-uniform shaft, and promptly its cross section diminishes along mass transport direction staged.
8, according to the described rotary kiln of claim 1, what it is characterized in that labyrinth type contacts firmly that dustproof construction (34) has an opening part (33) that is fixed on seal bootr (4) or (12) decides ring (45), on the fixed ring (45) one or two cannelure is arranged, each cannelure is embedded in a rotating ring (46), and rotating ring (46) constitutes its radially movable labyrinth gap of permission with groove and cooperates; The outside diameter d of the inner diameter d 1 of rotating ring (46) and return bend (6) is for movingly, and fit clearance is less than 0.5 millimeter; Each size relationship of this dustproof construction is: the maximum radial jerk value of end when d2-d1＞D2-D1＞return bend (6) rotates.
9, according to the described rotary kiln of claim 1, it is characterized in that the exhaust port device is contained in the suitable for reading of feed end seal bootr (4), it is suitable for reading that chimney (40) is contained in the exhaust port device; The exhaust port device connects to form by taking over (35), transition conduit (36) and mouthpiece (39).
10, according to claim 1 and 9 described rotary kilns, it is characterized in that taking between (35) and the transition conduit (36), between mouthpiece (39) and the transition conduit (36) all by moving flange (38) and decide flange (37) and be connected, between adapter (35) and the seal bootr (4), between chimney (40) and the mouthpiece (39) all by moving flange (43) and deciding flange (41) and be connected; Every pair of moving flange and decide to have between the flange four attachment screws; The corresponding aperture that each screw connects on two flanges is a screw on a flange, is the curved waist circular hole on another flange; Moving flange (38) has three curved waist circular holes and a screw, and deciding flange (37) has a curved waist circular hole and three screws, and moving flange (43) has four curved waist circular holes, and deciding flange (41) has four screws; The every pair of moving flange and decide flange and interconnect fixing position and can in the arc length scope of oval hole, rotate 20 °～60 ° angles.
11, according to the described rotary kiln of claim 1, it is characterized in that being equipped with respectively in return bend (6) feed end and the discharge end mouth of pipe spiral leaf tubular construction, it has a core pipe, grouping be staggered plurality of sector helical blade (47) or (51) on the core pipe, be that arrange by equidistantly dividing into groups at the core tube axis direction blade (47) or (51), every group has 2～4 blades (47) or (51) to arrange symmetrically along circumference that in a cross-section of core pipe adjacent set blade (47) or (51) are in the circumferencial direction interlaced arrangement; Spiral leaf tubular construction is connected and fixed by the same return bend of support arm (6), leaves the gap that assembly technology needs between the internal diameter of the external diameter of sector shaped helical blade (47) or (51) and return bend (6).
12,, it is characterized in that the uniform pitch thread shape structure that the core pipe of feed end spiral leaf tubular construction is made up of 4～8 taeniaes (48) and 2～4 helical stands (49) according to the described rotary kiln of claim 11; The core pipe (50) of discharge end spiral leaf tubular construction is to wait the wall thickness straight tube, and drawing on its external cylindrical surface has 2～4 equal pitch thread lines.
13, according to claim 11 and 12 described rotary kilns, it is characterized in that sector shaped helical blade (47) or (51) by above-mentioned grouping be staggered requirement along the helical stand (49) of (with) core pipe or threaded line (on) be welded, number of each group sector shaped helical blade (47) or (51) is identical with helical stand (49) number or screw thread the end of a thread number.
14, according to claim 11,12 and 13 described rotary structures, it is characterized in that θ=K(360 ° at the fan angle (projected angle) of sector shaped helical blade (47) and (51)/n), K=0.6 in the formula～0.8, n is a number of helical stand (49) number or threaded line.
15, according to the described rotary kiln of claim 1, it is characterized in that knocking device (5) has a casket (52) that is fixed on return bend (6), its stiff end is an opening, the other end is fixed a cross bar (55), place a steel ball (54) in the casket (52), when return bend (6) rotated, steel ball (54) breaks away from cross bar (55) immediately after arriving the extreme higher position support falls knocked return bend (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89205275 CN2071317U (en) | 1989-08-01 | 1989-08-01 | Outer heating rotary kiln for magnetic material sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89205275 CN2071317U (en) | 1989-08-01 | 1989-08-01 | Outer heating rotary kiln for magnetic material sintering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2071317U true CN2071317U (en) | 1991-02-13 |
Family
ID=4862470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89205275 Expired - Lifetime CN2071317U (en) | 1989-08-01 | 1989-08-01 | Outer heating rotary kiln for magnetic material sintering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2071317U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780948A (en) * | 2010-03-30 | 2010-07-21 | 佛山市南海万兴材料科技有限公司 | Sintering device used for sintering lithium phosphate |
| CN102305533A (en) * | 2011-08-26 | 2012-01-04 | 沈阳博联特熔融还原科技有限公司 | Method for isolating oxygen from rotary kiln by air curtain |
| CN103105056A (en) * | 2012-12-21 | 2013-05-15 | 泰兴冶炼厂有限公司 | Percussive device of rotary kiln |
| CN105135874A (en) * | 2015-10-07 | 2015-12-09 | 张琪雯 | Mineral refining furnace |
| CN110398153A (en) * | 2019-08-20 | 2019-11-01 | 四川众友联合实业有限公司 | A kind of energy-efficient melting furnace feeding assembly |
| CN112902655A (en) * | 2021-03-03 | 2021-06-04 | 刘志坚 | Process method for simultaneously firing multiple materials by adopting rotary kiln and spiral rotary kiln |
| CN116003120A (en) * | 2022-12-30 | 2023-04-25 | 北京七星飞行电子有限公司 | Technological method for improving product performance by utilizing presintering equipment |
| CN110398153B (en) * | 2019-08-20 | 2024-06-11 | 四川众友联合实业有限公司 | Energy-efficient melting furnace feeding subassembly |
-
1989
- 1989-08-01 CN CN 89205275 patent/CN2071317U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780948A (en) * | 2010-03-30 | 2010-07-21 | 佛山市南海万兴材料科技有限公司 | Sintering device used for sintering lithium phosphate |
| CN101780948B (en) * | 2010-03-30 | 2012-09-19 | 佛山市南海万兴材料科技有限公司 | Sintering device used for sintering lithium phosphate |
| CN102305533A (en) * | 2011-08-26 | 2012-01-04 | 沈阳博联特熔融还原科技有限公司 | Method for isolating oxygen from rotary kiln by air curtain |
| CN103105056A (en) * | 2012-12-21 | 2013-05-15 | 泰兴冶炼厂有限公司 | Percussive device of rotary kiln |
| CN105135874A (en) * | 2015-10-07 | 2015-12-09 | 张琪雯 | Mineral refining furnace |
| CN105135874B (en) * | 2015-10-07 | 2016-12-07 | 张琪雯 | A kind of mineral refining stove |
| CN110398153A (en) * | 2019-08-20 | 2019-11-01 | 四川众友联合实业有限公司 | A kind of energy-efficient melting furnace feeding assembly |
| CN110398153B (en) * | 2019-08-20 | 2024-06-11 | 四川众友联合实业有限公司 | Energy-efficient melting furnace feeding subassembly |
| CN112902655A (en) * | 2021-03-03 | 2021-06-04 | 刘志坚 | Process method for simultaneously firing multiple materials by adopting rotary kiln and spiral rotary kiln |
| CN112902655B (en) * | 2021-03-03 | 2023-02-24 | 刘志坚 | Process method for simultaneously firing multiple materials by adopting rotary kiln and spiral rotary kiln |
| CN116003120A (en) * | 2022-12-30 | 2023-04-25 | 北京七星飞行电子有限公司 | Technological method for improving product performance by utilizing presintering equipment |
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