CN102288036A - Microwave furnace and furnace lining thereof - Google Patents
Microwave furnace and furnace lining thereof Download PDFInfo
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- CN102288036A CN102288036A CN2011101694980A CN201110169498A CN102288036A CN 102288036 A CN102288036 A CN 102288036A CN 2011101694980 A CN2011101694980 A CN 2011101694980A CN 201110169498 A CN201110169498 A CN 201110169498A CN 102288036 A CN102288036 A CN 102288036A
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- furnace lining
- microwave
- top board
- microwave kiln
- kiln
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Abstract
The embodiment of the invention discloses a lining for a microwave furnace. The lining comprises a thermal insulation layer (130) and a refractory layer (120) which is surrounded by refractory bricks, wherein each refractory brick comprises a bottom plate (122), a top plate (121), and side plates (123,124) which are used for connecting the bottom plate (122) and the top plate (121); and the bottom plate (122), the top plate (121) and the side plates (123,124) are integrated. Because the top plate, the bottom plate and the side plates in the lining for the microwave furnace are integrated, when the microwave furnace is assembled, only the adjacent refractory bricks are required to be connected end to end, so that the assembly process is more convenient. The embodiment of the invention also discloses the microwave furnace which uses the furnace lining.
Description
Technical field
The present invention relates to a kind of kiln, more particularly, relate to a kind of microwave kiln and furnace lining.
Background technology
Industrial Stoves are industrial infrastructure devices, are again major power consumers simultaneously, and the energy consumption that therefore reduces Industrial Stoves is significant.
Traditional Industrial Stoves adopt coal, oil and gas to keep the internal temperature of kiln as the energy, but owing to adopt above-mentioned substance as the energy, the kiln temperature control accuracy is poor, fire emission is many, contaminated environment and being substituted gradually by electric furnace, particularly when firing some quality requirement high product, especially need to use electric furnace to fire, for example product such as new material, new forms of energy.Existing industrial furnace generally adopts resistance wire, Elema, Si-Mo rod, molybdenum filament, graphite etc. as heater element.During the work of above-mentioned heater element, at first whole burner hearth is carried out radiation heating, treat that the burner hearth internal temperature raises after, by heat radiation and heat conduction the product ecto-entad is heated then.Because the internal and external temperature gradient is big in the product sintering procedure, the uniformity of product is bad, is easy to generate cracking, quality problems such as insufficient burnt.In addition, heater element self-temperature height, and be subjected to the erosion of kiln atmosphere, damage easily.
The furnace lining that is provided with in the existing kiln comprises heat-insulation layer and the flame retardant coating that is surrounded by refractory brick, and wherein, firebrick structure is single, need be by refractory brick encircle a city respectively top, bottom and the both sides of flame retardant coating, and its assembling process is comparatively loaded down with trivial details.
Therefore, how to work out a kind of furnace lining of being convenient to assemble and kiln, become the technical problem that those skilled in the art need to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of microwave kiln and furnace lining, to realize the purpose of ease of assembly.
For achieving the above object, the invention provides following technical scheme:
A kind of furnace lining that is used for microwave kiln comprises heat-insulation layer and by the flame retardant coating that refractory brick surrounded, described refractory brick comprises the side plate of base plate, top board, the described base plate of connection and top board, and described base plate, top board and side plate are integral structure.
Preferably, at the above-mentioned furnace lining that is used for microwave kiln, the length range of described top board is 0.3～1.5 meter.
Preferably, at the above-mentioned furnace lining that is used for microwave kiln, the length of described top board is 1 meter.
A kind of microwave kiln comprises body of heater, and described body of heater comprises housing and furnace lining, and described furnace lining is arranged on the inside of described housing, and described furnace lining inner space forms burner hearth; Described furnace lining comprises heat-insulation layer and by the flame retardant coating that refractory brick surrounded, described refractory brick comprises the side plate of base plate, top board, the described base plate of connection and top board, and described base plate, top board and side plate are integral structure.
Preferably, in above-mentioned microwave kiln, the bottom of described furnace lining also is provided with the burner hearth bracing frame.
Preferably, in above-mentioned microwave kiln, described burner hearth bracing frame and described flame retardant coating touching position are provided with positioning convex.
Preferably, in above-mentioned microwave kiln, described burner hearth bracing frame is SUS310S steel bracing frame or SUS314 steel bracing frame.
Preferably, in above-mentioned microwave kiln, described heat-insulation layer is the heat-preservation cotton layer.
Preferably, in above-mentioned microwave kiln, described heat-preservation cotton layer is a high temperature fiber aluminosilicate fiber cotton layer.
Preferably, in above-mentioned microwave kiln, the content of described furnace lining neutral and alkali metal oxide is lower than 0.5Wt%.
Preferably, in above-mentioned microwave kiln, Fe in the described furnace lining
2O
3Content be lower than 0.3Wt%.
Preferably, in above-mentioned microwave kiln, the zirconium metal oxide content is lower than 0.3Wt% in the described furnace lining.
Microwave kiln provided by the invention is because its flame retardant coating is to be assembled by refractory brick, and the top board of this refractory brick, base plate and side plate are integral structure.When needs assembling microwave kiln, only adjacent refractory brick need be joined end to end gets final product, and refractory brick need not be assembled into top, bottom and the both sides of flame retardant coating respectively, and its assembling process is more convenient.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The microwave kiln structural representation that Fig. 1 provides for the embodiment of the invention;
The structural representation of the body of heater that Fig. 2 provides for the embodiment of the invention;
The structural representation of the furnace lining that Fig. 3 provides for the embodiment of the invention;
The structural representation of the burner hearth bracing frame that Fig. 4 provides for the embodiment of the invention;
Wherein, 1 is body of heater, and 110 is housing, and 120 is flame retardant coating, 121 is top board, and 122 is base plate, and 123 is side plate, and 124 is side plate, 130 is heat-insulation layer, and 140 is the burner hearth bracing frame, and 141 is positioning convex, and 2 is magnetron, 3 is thermocouple, and 4 is hermatic door, and 5 is push rod, and 6 is hermatic door, 7 is push rod, and 9 is roller shelves, and 10 are push pedal, and 11 is hermatic door, 12 is push rod, and 13 is hermatic door, and 14 is push rod, and 15 are the horizontal frame that pushes away.
The specific embodiment
Partly describe heater element when work in traditional as can be known electric furnace by background technology, at first whole burner hearth carried out radiation heating, treat burner hearth internal temperature rise height after, by heat radiation and heat conduction the product ecto-entad is heated then.Because the internal and external temperature gradient is big in the product sintering procedure, the uniformity of product is bad, is easy to generate cracking, quality problems such as insufficient burnt.In addition, heater element self-temperature height, and be subjected to the erosion of kiln atmosphere, damage easily.
For this reason, the inventor works out a kind of kiln that adopts microwave heating, heating using microwave utilizes the basic fine structure coupling of special wave band that microwave has and material and produces heat, and the dielectric loss of material makes its material monolithic be heated to sintering temperature and realize densified method.During heating using microwave, inside and outsidely heat simultaneously, can realize that the zero gradient in the big zone of product evenly heats, the material internal thermal stress is reduced, thereby reduce cracking, distortion tendency.Owing to directly being absorbed by material, microwave energy is converted into heat energy simultaneously, so capacity usage ratio is high, than normal sintering energy-conservation about 80%.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As depicted in figs. 1 and 2, the invention provides a kind of microwave kiln, this kiln comprises body of heater 1, hermatic door, material moving system (marking among the figure) and electric-control system (marking among the figure), wherein, body of heater 1 comprises housing 110 and furnace lining, this furnace lining comprises heat-insulation layer and by the flame retardant coating 120 that refractory brick surrounded, furnace lining is arranged on the inside of housing 110, and the furnace lining inner space forms burner hearth; Hermatic door is arranged on the housing 110; The material moving system is arranged on burner hearth bottom; Electric-control system is used to control the internal temperature of burner hearth; Housing 110 is provided with magnetron 2, and this magnetron 2 is electrically connected with electric-control system.On the body of heater support can also be set in the embodiment of the invention, this support is arranged on the housing.
Magnetron 2 is launched microwave in the course of the work, and product carried out sintering, the kiln of said structure is compared with traditional kiln and is adopted microwave to carry out sintering, and microwave sintering mainly is to utilize the basic fine structure coupling of special wave band that microwave has and material and produce heat, and the dielectric loss of material makes its material monolithic be heated to sintering temperature and implementation structure densified.Because the inside and outside heating simultaneously of above-mentioned mode of heating product can realize that the zero gradient in big zone in the material evenly heats, and the material internal thermal stress is reduced, thereby reduces cracking, distortion tendency, has improved the quality of firing product.Be converted into heat energy owing to microwave energy is directly absorbed by material simultaneously,, reduced the energy consumption in the sintering procedure so capacity usage ratio is high.
In order further to shorten the firing time, the microwave frequency range of above-mentioned magnetron 2 emissions is 500～3000MHz in the embodiment of the invention.Preferably, the microwave frequency of magnetron 2 emissions is 915MHz or 2450MHz.Burner hearth is a tunnel-type hearth, and the housing parts of whole body of heater 1 can be made up of single housing 110, and perhaps a plurality of housings 110 linking mutually combine, and housing 110 inside are provided with furnace lining, and this furnace lining has fire-resistant and heat insulating function.
When adopting the mode of heating of microwave sintering, because top, bottom and the both sides of the flame retardant coating of traditional furnace lining assemble, therefore, its assembling process more complicated.
Assemble furnace lining for convenience, furnace lining in the embodiment of the invention is compared with furnace lining of the prior art, as shown in Figure 3, this furnace lining comprises heat-insulation layer 130 and flame retardant coating 120, and wherein, flame retardant coating 120 is to assemble by refractory brick is end to end, this refractory brick comprises top board 121, base plate 122, side plate 123 and side plate 124, side plate 123 is connected top board 121 and base plate 122 with side plate 124, wherein, top board 121, base plate 122, side plate 123 and side plate 124 are integral structure.The size of above-mentioned refractory brick is according to the setting of being correlated with of the size requirements of different kilns, wherein the length range of top board 121 is: 0.3 meter～1.5 meters, preferably 1 meter of the length of top board 121, adopt the top board 121 of this size, produce the quantity in slit in the time of not only can reducing a plurality of refractory brick effectively and be stitched together, and processing is got up more convenient.
Absorb the microwave amount in order to reduce furnace lining, the content of furnace lining neutral and alkali metal oxide is lower than 0.5Wt% in embodiments of the present invention, particularly Fe in the furnace lining
2O
3Content be lower than 0.3Wt%, the zirconium metal oxide content is lower than 0.3Wt%, by restriction furnace lining neutral and alkali metal oxide, Fe
2O
3Reduce the microwave amount that furnace lining absorbs with the content of zirconium metal oxide.
In order to support flame retardant coating 120, to prevent flame retardant coating 120 distortion, the bottom of flame retardant coating 120 also is provided with burner hearth bracing frame 140.This burner hearth bracing frame 140 is a steel burner hearth bracing frame 140, because steel do not absorb microwave, thereby can reduce the loss of microwave.This burner hearth bracing frame 140 can be for adopting SUS310S steel bracing frame or SUS314 steel bracing frame.The intensity of steel is big, and only the skeleton that needs a small amount of steel to make can reach the purpose of stable support burner hearth.For reaching stablizing effect preferably, be provided with positioning convex 141 at the top of burner hearth bracing frame 140 (with flame retardant coating 120 contacted positions), as shown in Figure 4, make recessed shape at flame retardant coating 120 bottom counterparts, flame retardant coating 120 is placed on the position that burner hearth bracing frame 140 can be maintained fixed.For the heat conduction of steel skeleton is reduced, must under the situation that guarantees bearing strength, reduce steel quantity as far as possible.
Can be the heat-preservation cotton layer in order to reach the above-mentioned heat-insulation layer 130 of heat insulation effect, reach the effect that is incubated and sees through microwave.When for the heat-preservation cotton layer, generally select the cotton layer of high temperature resistant silicic acid aluminum fiber for use.
Adopt the kiln of this furnace lining to reduce absorption on the one hand, reduce the workload of building stove on the other hand microwave.The microwave high-temperature sintering ejection plate kiln of the continuous operation in the embodiment of the invention, material in the promotion push pedal 10 enters burner hearth inside and realizes under the effect of material moving system, this material moving system comprises track, push pedal 10, push rod and push rod controller, and wherein, track runs through burner hearth; The feeding mouth place of track is provided with push rod, and can promote to place the push pedal 10 on the track to move; The push rod controller is electrically connected with push rod.
The track that is positioned at body of heater 1 inside surrounds " returning " font with the track that is positioned at body of heater 1 outside, and this track pushes away frame 15 and roller shelves 9 is formed by horizontal.For convenience, the track that is positioned at body of heater 1 inside is first track, the track that is positioned at the first track both sides is respectively second track and the 3rd track, wherein, second track is positioned at the discharging opening place of body of heater 1, the 3rd track is positioned at the charging aperture place of body of heater 1, and the track relative with first track is the 4th track.Also be provided with the horizontal frame 15 that pushes away on second track and the 3rd track, these horizontal two ends that push away frame 15 are respectively arranged with a push rod, realize push pedal 10 commutation in orbit.
In order to keep the horizontal temperature that pushes away in the frame 15, horizontal charging aperture and the discharging opening that pushes away frame 15 is provided with hermatic door, when push rod moves, and corresponding with it hermatic door action.Push rod in the material moving system can be electric pushrod, air-leg or hydraulic push rod.
Above-mentioned material moving system pusher process is specially:
Hermatic door 6 is opened, and push rod 7 is boosted the push pedal on the track 10, and push rod 7 retreats, and hermatic door 6 is closed.Realize the continuous supply and the release of body of heater 1 material thus, above pusher process only for for example, also has other pusher program also can realize the automatic circulation of pusher process, and can not cause microwave leakage or furnace atmosphere destruction.
The unlatching of hermatic door or close in the above-mentioned pusher process, push rod advances or retreats and can manually control, also can control automatically and can also carry out manual automatic change action, when adopting control automatically, carry out control corresponding by the push rod controller, be provided with grammed switch on all tracks, be described in detail with first track, the discharging opening place of first track is provided with first grammed switch.
Concrete control procedure is:
The push rod controller receives default order, and sends open command to hermatic door 4;
The push rod controller receives above-mentioned signal, and sends the propelling instruction to push rod 5;
The push rod controller receives above-mentioned signal, and retreats instruction to push rod 5 transmissions, and when push rod arrived body of heater 1 outside predeterminated position, grammed switch moved, and gave the push rod controller with this signal feedback;
The push rod controller receives above-mentioned signal, and sends out code to push rod 5;
Also be provided with alarm in order to make in the accurate more above-mentioned control procedure of control procedure, when push rod 5 arrived predeterminated positions, alarm was reported to the police, to remind the staff.
In embodiments of the present invention, electric-control system comprises temperature measuring device and temperature controller, and temperature controller will receive the detected temperature signal of temperature measuring device and preset value and obtain fiducial value after relatively, and according to the unlatching of this fiducial value control magnetron 2 or close.Above-mentioned temperature measuring device is thermocouple 3 or infrared thermometer.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (12)
1. furnace lining that is used for microwave kiln, comprise heat-insulation layer (130) and by flame retardant coating (120) that refractory brick surrounded, it is characterized in that, described refractory brick comprises base plate (122), top board (121), connects the side plate (123 of described base plate (122) and top board (121), 124), described base plate (122), top board (121) and side plate (123,124) are integral structure.
2. the furnace lining that is used for microwave kiln as claimed in claim 1 is characterized in that, the length range of described top board (121) is 0.3～1.5 meter.
3. the furnace lining that is used for microwave kiln as claimed in claim 1 is characterized in that, the length of described top board (121) is 1 meter.
4. a microwave kiln comprises body of heater (1), and described body of heater (1) comprises housing (110) and furnace lining, and described furnace lining is arranged on the inside of described housing (110), and described furnace lining inner space forms burner hearth; Described furnace lining comprises heat-insulation layer (130) and by flame retardant coating (120) that refractory brick surrounded, it is characterized in that, described refractory brick comprises base plate (122), top board (121), connects the side plate (123 of described base plate (122) and top board (121), 124), described base plate (122), top board (121) and side plate (123,124) are integral structure.
5. microwave kiln as claimed in claim 1 is characterized in that, the bottom of described furnace lining also is provided with burner hearth bracing frame (140).
6. microwave kiln as claimed in claim 5 is characterized in that, described burner hearth bracing frame (140) is provided with positioning convex (141) with described flame retardant coating (120) touching position.
7. microwave kiln as claimed in claim 5 is characterized in that, described burner hearth bracing frame (140) is SUS310S steel bracing frame or SUS314 steel bracing frame.
8. microwave kiln as claimed in claim 1 is characterized in that, described heat-insulation layer (130) is the heat-preservation cotton layer.
9. microwave kiln as claimed in claim 8 is characterized in that, described heat-preservation cotton layer is a high temperature fiber aluminosilicate fiber cotton layer.
10. as each described microwave kiln of claim 1-9, it is characterized in that the content of described furnace lining neutral and alkali metal oxide is lower than 0.5Wt%.
11., it is characterized in that Fe in the described furnace lining as each described microwave kiln of claim 1-9
2O
3Content be lower than 0.3Wt%.
12., it is characterized in that the zirconium metal oxide content is lower than 0.3Wt% in the described furnace lining as each described microwave kiln of claim 1-9.
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| CN2011101694980A CN102288036A (en) | 2011-06-22 | 2011-06-22 | Microwave furnace and furnace lining thereof |
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| CN2011101694980A CN102288036A (en) | 2011-06-22 | 2011-06-22 | Microwave furnace and furnace lining thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102925667A (en) * | 2012-11-16 | 2013-02-13 | 山东永鑫能源集团有限公司 | Independent container for producing rich-titanium material and preparation method of rich-titanium material with independent container |
| CN103411428A (en) * | 2013-09-02 | 2013-11-27 | 湖南阳东微波科技有限公司 | Art ceramics microwave sintering furnace |
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| CN103411428A (en) * | 2013-09-02 | 2013-11-27 | 湖南阳东微波科技有限公司 | Art ceramics microwave sintering furnace |
| CN103411428B (en) * | 2013-09-02 | 2016-01-27 | 湖南阳东微波科技有限公司 | A kind of art pottery microwave agglomerating furnace |
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Application publication date: 20111221 |