CN103115487A - Tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor - Google Patents
Tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor Download PDFInfo
- Publication number
- CN103115487A CN103115487A CN2013100241234A CN201310024123A CN103115487A CN 103115487 A CN103115487 A CN 103115487A CN 2013100241234 A CN2013100241234 A CN 2013100241234A CN 201310024123 A CN201310024123 A CN 201310024123A CN 103115487 A CN103115487 A CN 103115487A
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- tunnel
- entrained
- kiln
- tunnel cave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 93
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 38
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 title claims abstract description 34
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000012545 processing Methods 0.000 claims abstract description 26
- 229910021419 crystalline silicon Inorganic materials 0.000 claims abstract description 23
- 239000002699 waste material Substances 0.000 claims abstract description 22
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 21
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 23
- 235000013312 flour Nutrition 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 241001669679 Eleotris Species 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 239000003063 flame retardant Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 235000013339 cereals Nutrition 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000012946 outsourcing Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 abstract description 6
- 230000009977 dual effect Effects 0.000 abstract 2
- 238000010304 firing Methods 0.000 abstract 2
- 238000001035 drying Methods 0.000 abstract 1
- 239000012065 filter cake Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 abstract 1
- 239000000376 reactant Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 239000007921 spray Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Ceramic Products (AREA)
Abstract
The invention relates to a tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor. A tunnel type sintering channel is formed by the tunnel kiln and a matched tunnel kiln car in a combined mode, working pressure is smaller than or equal to 0.1MPa, the sectional area of a tunnel is 0.5-4 times that of an entrained-flow bed, the length of the tunnel is 5-20 times that of the entrained-flow bed, and a preheating zone, a firing zone and a cooling zone are formed; ceramic blank loaded on the kiln car and prepared with dual sand as material enters into the preheating zone of the tunnel kiln through a kiln head, exchanges heat with the high-temperature nitrogen brought from the firing zone to complete blank preheating, wherein the dual sands is recycled through processing of waste mortar with crystalline silicon nitridation sintering reaction is carried out between the preheated blank and the nitrogen discharged by the entrained-flow bed, wherein the temperature of the nitrogen is smaller than or equal to 1600 DEG C; the reactant enters into the cooling zone, exchanges heat with the nitrogen prepared by a nitrogen generation system to be cooled to 200-600 DEG C, and then exits the tunnel kiln to form ceramic material of the silicon nitride combined with the silicon carbide; and the temperature of the nitrogen completing preheating and heat exchange is 300-800 DEG C, the nitrogen is discharged from an exhaust duct at the front portion of the tunnel kiln preheating zone and enters into a silica powder filter cake dryer for drying silica powder.
Description
Technical field
The present invention relates to a kind of tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide, belong to solar-energy photo-voltaic cell crystalline silicon processing waste and fully utilize the field.
Background technology
The silicon nitride combined silicon carbide ceramic material is a kind of advanced person's engineering ceramic material, have high room temperature and elevated temperature strength, high rigidity, corrosion resistance, non-oxidizability and good heat shock resistance and mechanical shock performance, thought high comprehensive performance in the structural ceramics field by material supply section educational circles, obtain a kind of new material of extensive use in high-tech, high-temperature field.
Crystalline silicon processing waste mortar is the quaternary mixture system that is mixed with 40～50%PEG (polyethylene glycol cutting liquid), 45～30%SiC (cutting abrasive material), 1～3% iron powder (line of cut wearing and tearing), 14～17%Si powder (crystalline silicon abrasive dust) that forms in the solar-energy photo-voltaic cell process of manufacture.
The applicant paid close attention to the processing problem of solar-energy photo-voltaic cell crystalline silicon processing waste mortar, the optimized recovery and utilization technology of exploratory development since 2006.The application for a patent for invention of application number 201110101064.7 " waste mortar formed by processing photovoltaic cell crystalline silicon integrated treatment new method " was proposed on April 22nd, 2011, the application for a patent for invention that proposed application number 201110238197.9 " comprehensive treatment technology of waste mortar in processing of photovoltaic crystalline silicon " on 08 12nd, 2011 has been carried out replenishing perfect to previous patent application.On June 26th, 2012, application number 201110238197.9 " comprehensive treatment technology of waste mortar in processing of photovoltaic crystalline silicon " was that 201210207989.4 " without the crystalline silicon processing waste mortar comprehensive treatment techniques of sewage and solid waste discharging " have proposed to contain SiC, Si binary sand as raw material for priority has proposed application number again, utilized the technical scheme of the synthetic nano-silicon nitride of air flow bed nitrogenize; Afterwards the Industrialized processing technique of this scheme conducted in-depth research, invention has designed " utilizing crystalline silicon processing waste mortar to reclaim the unit that silica flour prepares silicon nitride product ", " reclaiming the entrained-flow reactor that silica flour prepares beta-silicon nitride powder with crystalline silicon processing waste mortar ", and utilize the processing of the nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that the process of entrained-flow reactor synthesizing silicon nitride micro mist discharges≤1600 ℃ just to become problem needing to overcome with utilizing.
Summary of the invention
The present invention is to application number 201210207989.4 " without the crystalline silicon processing waste mortar comprehensive treatment technique of sewage and solid waste discharging " and this " reclaiming the unit that silica flour prepares silicon nitride product with crystalline silicon processing waste mortar " of applying for together, the Supplementary and perfect of " reclaiming the entrained-flow reactor that silica flour prepares beta-silicon nitride powder with crystalline silicon processing waste mortar " application for a patent for invention; Mainly solve the temperature that the process of entrained-flow reactor synthesizing silicon nitride micro mist discharges≤1600 ℃ the nitrogen of carrying a small amount of silicon nitride powder secretly processing with utilize problem.
The tunnel cave that the purpose of this invention is to provide the nitrogen sintered silicon nitride based on silicon carbide ceramic material of carrying a small amount of silicon nitride powder secretly of a kind of temperature of utilizing crystalline silicon processing waste mortar to reclaim entrained-flow reactor that silica flour prepares beta-silicon nitride powder to discharge≤1600 ℃.
The object of the present invention is achieved like this: tunnel cave and supporting kiln car are combined to form the tunnel type sintered channels, operating pressure≤0.1MPa, the tunnel sectional area is 0.5--4 times of air flow bed sectional area, and length is air flow bed height 5--20 times, forms preheating zone, clinkering zone, salband; The binary sand that crystalline silicon processing waste mortar reclaims that utilizes that is contained on kiln car enters tunnel furnace preheating zone for the ceramic blank that raw material prepares by kiln hood, with the high temperature nitrogen heat exchange that the section of burning till band is come, completes the blank preheating; The nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that the blank after preheating and entrained-flow reactor are discharged≤1600 ℃ is completed nitridation sintered reaction; Enter salband, go out the tunnel kiln tail when cooling to 200--600 ℃ with the nitrogen heat exchange of nitrogen gas generating system preparation, become the silicon nitride combined silicon carbide ceramic material; Complete the nitrogen temperature of pre-heating heat-exchanging at 300--800 ℃, from the exhaust passage discharge of tunnel furnace preheating zone front portion, enter the dry silica flour of silica flour filtration cakes torrefaction machine.
Tunnel cave adopts split cage frame structure, be connected channel-section steel with sleeper as base take tunnel kiln Car Track, channel-section steel sleeper, be aided with shaped steel column, crossbeam, connecting rod formation cage framework, outsourcing sheet material forms the tunnel cave casing, and a plurality of casings connect to form tunnel cave general frame casing.
Tunnel cave and supporting kiln car are combined to form the tunnel type sintered channels, adopt flame-retardant fibre board to build by laying bricks or stones, adopt the sealing of combination sand seal between tunnel bottom and kiln car, keep that in kiln, operating pressure at 0.01--0.1MPa, prevents the tunnel cave energy loss.
Tunnel cave and supporting kiln car are combined to form the tunnel type sintered channels, the employing fire-resistant heat insulating material is built by laying bricks or stones, with the mode that adopts labyrinth sealing and the sealing of multiple tracks sand seal to combine between kiln car, keep the interior operating pressure of kiln at 0.01--0.1MPa, prevent the tunnel cave energy loss.
It is thermal source that tunnel cave adopts the high temperature nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that entrained-flow reactor discharges≤1600 ℃, does not establish the combustion chamber; Entrained-flow reactor is discharged the nitrogen distributor and is equivalent to the top ignition combustion chamber.
Tunnel cave kiln hood, kiln tail arrange respectively wicket, in order to seal kiln hood, kiln tail when tunnel cave passes in and out without kiln car, reduce nitrogen and and thermal loss in kiln.
The tunnel furnace preheating zone leading portion each side arranges a nitrogen discharge passage, for the nitrogen after the discharging pre-heating heat-exchanging, and the nitrogen input silica flour filtration cakes torrefaction machine of discharging.
The Cooling Section of Tunnel Kiln back segment arranges the cool nitrogen jet pipe, utilizes but product of nitrogen-making device residual nitrogen air cooling.
Arrange 2--20 along the tunnel cave length direction and detect the hole, for detection of the reactor pressure temperature variations, and as reference, whole supporting unit is controlled automatically.
Be used for raw material that tunnel cave burns till and be the nitrogen that binary sand that crystalline silicon processing waste mortar reclaims and entrained-flow reactor are discharged, binary sand grains footpath≤30um wherein, its composition is Si=40--20%, SiC=60--80%, Fe
2O
3≤ 0.1%; The nitrogen temperature that entrained-flow reactor is discharged≤1600 ℃, pressure 0.01～1.0MPa.
Hereby in conjunction with the accompanying drawings and embodiments the present invention is further illustrated.
Description of drawings
Fig. 1 is the labyrinth seal tunnel cave nitrogen inlet profile that comprises kiln car.
Fig. 2 is labyrinth seal tunnel cave profile.
Fig. 3 is the flat seal tunnel cave nitrogen inlet profile that comprises kiln car.
Fig. 4 is flat seal tunnel cave profile.
Fig. 5 is tunnel cave profile front view.
Fig. 6 is the tunnel cave section plan.
Numeral tunnel kiln structure in figure: 1 is the tunnel cave guide rail, and 2 is the guide-track groove steel sleeper, and 3 for sleeper connects channel-section steel, and 1,2,3 are combined formation tunnel cave cage frame base; 4 is that column, 5 is crossbeam, and 6 is connecting rod, and 7 is the masonry base plate, and 8 is sand table sealing lath, and 1～8 is combined formation tunnel cave cage framework; 9 is cage framework encased steel plate, 10 are the labyrinth seal masonry, 11 is the flame-retardant fibre board masonry, 12 are entrained-flow reactor discharge nitrogen distributor, 13 is the tunnel kiln sintering tunnel, and 14 is kiln car, and 15 is nitrogen exhaust passage, preheating zone, 16 for cool nitrogen sprays into pipe, and 17 is that wicket, 18 is thermometric, pressure tap.
The specific embodiment
Be below specific embodiments of the invention, but method of the present invention and not exclusively being limited, the those skilled in the art can be as required changes or adjusts wherein structure.
Embodiment 1:
Comprise that as Fig. 1 labyrinth seal tunnel cave nitrogen inlet profile, Fig. 2 of kiln car are that labyrinth seal tunnel cave profile, Fig. 5 are that tunnel cave profile front view, Fig. 6 are as shown in the tunnel cave section plan: tunnel cave and supporting kiln car 14 are combined to form tunnel type sintered channels 13, tunnel cave operating pressure≤0.1MPa, the tunnel sectional area is 0.5--4 times of air flow bed sectional area, length is air flow bed height 5--20 times, forms preheating zone, clinkering zone, salband; The binary sand that crystalline silicon processing waste mortar reclaims of utilizing that is contained on kiln car 14 is entered the preheating zone in tunnel kiln sintering tunnel 13 by kiln hood for the ceramic blank of raw material preparation, be with the high temperature nitrogen heat exchange of coming with the section of burning till, and completes the blank preheating; Blank after preheating is completed nitridation sintered reaction with the reaction nitrogen of discharging the temperature that nitrogen distributor 12 enters≤1600 ℃ from entrained-flow reactor; Kiln car 14 and product introduction salband spray into cool nitrogen and go out tunnel cave when the pipe 16 nitrogen heat exchange that spray into cool to 200--600 ℃, become the silicon nitride combined silicon carbide ceramic material; Complete the nitrogen temperature of pre-heating heat-exchanging at 300--800 ℃, exhaust passage 15 discharges from the tunnel furnace preheating zone front portion enter the dry silica flour of silica flour filtration cakes torrefaction machine.
The tunnel cave body adopts split cage frame structure to combine, take tunnel kiln Car Track 1, channel-section steel sleeper 2, connection channel-section steel 3 as base, be aided with shaped steel column 4, crossbeam 5, connecting rod 6 formation cage frameworks, outsourcing sheet material 9 forms the tunnel cave casing, and a plurality of casings connect to form tunnel cave general frame casing (Fig. 5,6).
Tunnel cave and supporting kiln car are combined to form sintering tunnel 13, bottom employing fire-resistant heat insulating material is built into the maze trough 10 with kiln car heat-barrier material curves by laying bricks or stones, top adopts flame-retardant fibre board to build into insulator 11 by laying bricks or stones, adopt the sealing of combination sand seal between tunnel bottom and kiln car, keep the interior operating pressure of kiln at 0.01--0.1MPa, prevent the tunnel cave energy loss.
Be thermal source because tunnel cave adopts the high temperature nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that entrained-flow reactor discharges≤1600 ℃, do not establish the combustion chamber; Entrained-flow reactor is discharged nitrogen distributor 12 and is equivalent to the top ignition combustion chamber.
Tunnel cave kiln hood, kiln tail arrange respectively wicket 17, in order to seal kiln hood, kiln tail when tunnel cave passes in and out without kiln car, prevent that in kiln, nitrogen is overflowed from kiln hood, kiln tail, cause nitrogen and and thermal loss in kiln.
The tunnel furnace preheating zone leading portion left and right sides arranges nitrogen discharge passage 15, for the nitrogen after the discharging pre-heating heat-exchanging, and the nitrogen input silica flour filtration cakes torrefaction machine of discharging.
The Cooling Section of Tunnel Kiln back segment arranges cool nitrogen jet pipe 16, utilizes but product of nitrogen-making device residual nitrogen air cooling.
Arrange 2--20 along the tunnel cave length direction and detect hole 18, for detection of the reactor pressure temperature variations, and as reference, whole supporting unit is controlled automatically.
Be used for raw material that tunnel cave burns till and be the nitrogen that binary sand that crystalline silicon processing waste mortar reclaims and entrained-flow reactor are discharged, binary sand grains footpath≤30um wherein, its composition is Si=40--20%, SiC=60--80%, Fe
2O
3≤ 0.1%; The nitrogen temperature that entrained-flow reactor is discharged≤1600 ℃, pressure 0.01～1.0MPa.
Embodiment 2:
Comprise that as Fig. 3 flat seal tunnel cave nitrogen inlet profile, Fig. 2 of kiln car are that flat seal tunnel cave profile, Fig. 5 are that tunnel cave profile front view, Fig. 6 are as shown in the tunnel cave section plan: tunnel cave and supporting kiln car 14 are combined to form tunnel type sintered channels 13, tunnel cave operating pressure≤0.1MPa, the tunnel sectional area is 0.5--4 times of air flow bed sectional area, length is air flow bed height 5--20 times, forms preheating zone, clinkering zone, salband; The binary sand that crystalline silicon processing waste mortar reclaims of utilizing that is contained on kiln car 14 is entered the preheating zone in tunnel kiln sintering tunnel 13 by kiln hood for the ceramic blank of raw material preparation, be with the high temperature nitrogen heat exchange of coming with the section of burning till, and completes the blank preheating; Blank after preheating is completed nitridation sintered reaction with the nitrogen of discharging the temperature that nitrogen distributor 12 enters≤1600 ℃ from entrained-flow reactor; Kiln car 14 and product introduction salband spray into cool nitrogen and go out tunnel cave when the pipe 16 nitrogen heat exchange that spray into cool to 200--600 ℃, become the silicon nitride combined silicon carbide ceramic material; Complete the nitrogen temperature of pre-heating heat-exchanging at 300--800 ℃, exhaust passage 15 discharges from the tunnel furnace preheating zone front portion enter the dry silica flour of silica flour filtration cakes torrefaction machine.
The tunnel cave body adopts split cage frame structure to combine, take tunnel kiln Car Track 1, channel-section steel sleeper 2, connection channel-section steel 3 as base, be aided with shaped steel column 4, crossbeam 5, connecting rod 6 formation cage frameworks, outsourcing sheet material 9 forms the tunnel cave casing, and a plurality of casings connect to form tunnel cave general frame casing (Fig. 5,6).
Tunnel cave and supporting kiln car are combined to form tunnel type sintered channels 13, adopt flame-retardant fibre board to build insulator 11 by laying bricks or stones, adopt the sealing of combination sand seal between tunnel bottom and kiln car, keep the interior operating pressure of kiln at 0.01--0.1MPa, prevent the tunnel cave energy loss.
Be thermal source because tunnel cave adopts the high temperature nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that entrained-flow reactor discharges≤1600 ℃, there is no the combustion chamber; Entrained-flow reactor is discharged nitrogen distributor 12 and is equivalent to the top ignition combustion chamber.
Tunnel cave kiln hood, kiln tail arrange respectively wicket 17, in order to seal kiln hood, kiln tail when tunnel cave passes in and out without kiln car, prevent that in kiln, nitrogen is overflowed from kiln hood, kiln tail, cause nitrogen and and thermal loss in kiln.
The tunnel furnace preheating zone leading portion left and right sides arranges nitrogen discharge passage 15, for the nitrogen after the discharging pre-heating heat-exchanging, and the nitrogen input silica flour filtration cakes torrefaction machine of discharging.
The Cooling Section of Tunnel Kiln back segment arranges cool nitrogen jet pipe 16, utilizes but product of nitrogen-making device residual nitrogen air cooling.
Arrange 2--20 along the tunnel cave length direction and detect hole 18, for detection of the reactor pressure temperature variations, and as reference, whole supporting unit is controlled automatically.
Be used for raw material that tunnel cave burns till and be the nitrogen that binary sand that crystalline silicon processing waste mortar reclaims and entrained-flow reactor are discharged, binary sand grains footpath≤30um wherein, its composition is Si=40--20%, SiC=60--80%, Fe
2O
3≤ 0.1%; The nitrogen temperature that entrained-flow reactor is discharged≤1600 ℃, pressure 0.01～1.0MPa.
Claims (10)
1. discharge the tunnel cave of nitrogen production silicon nitride products based on silicon carbide with entrained-flow reactor, it is characterized in that: tunnel cave and supporting kiln car are combined to form the tunnel type sintered channels, operating pressure≤0.1MPa, the tunnel sectional area is 0.5--4 times of air flow bed sectional area, length is air flow bed height 5--20 times, forms preheating zone, clinkering zone, salband; The binary sand that crystalline silicon processing waste mortar reclaims that utilizes that is contained on kiln car enters tunnel furnace preheating zone for the ceramic blank that raw material prepares by kiln hood, with the high temperature nitrogen heat exchange that the section of burning till band is come, completes the blank preheating; The nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that the blank after preheating and entrained-flow reactor are discharged≤1600 ℃ is completed nitridation sintered reaction; Enter salband, go out the tunnel kiln tail when cooling to 200--600 ℃ with the nitrogen heat exchange of nitrogen gas generating system preparation, become the silicon nitride combined silicon carbide ceramic material; Complete the nitrogen temperature of pre-heating heat-exchanging at 300--800 ℃, from the exhaust passage discharge of tunnel furnace preheating zone front portion, enter the dry silica flour of silica flour filtration cakes torrefaction machine.
2. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: tunnel cave adopts split cage frame structure, be connected channel-section steel with sleeper as base take tunnel kiln Car Track, channel-section steel sleeper, be aided with shaped steel column, crossbeam, connection thick stick formation cage framework, outsourcing sheet material forms the tunnel cave casing, and a plurality of casings connect to form tunnel cave general frame casing.
3. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: tunnel cave and supporting kiln car are combined to form the tunnel type sintered channels, the employing flame-retardant fibre board is built by laying bricks or stones, adopt the sealing of combination sand seal between tunnel bottom and kiln car, keep the interior operating pressure of kiln at 0.01--0.1MPa, prevent the tunnel cave energy loss.
4. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: tunnel cave and supporting kiln car are combined to form the tunnel type sintered channels, the employing fire-resistant heat insulating material is built by laying bricks or stones, with the mode that adopts labyrinth sealing to combine with the sealing of multiple tracks sand seal between kiln car, keep the interior operating pressure of kiln at 0.01--0.1MPa, prevent the tunnel cave energy loss.
5. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: it is thermal source that tunnel cave adopts the high temperature nitrogen of carrying a small amount of silicon nitride powder secretly of the temperature that entrained-flow reactor discharges≤1600 ℃, does not establish the combustion chamber; Entrained-flow reactor is discharged the nitrogen distributor and is equivalent to the top ignition combustion chamber.
6. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: tunnel cave kiln hood, kiln tail have respectively wicket, so that sealing kiln hood, kiln tail when tunnel cave passes in and out without kiln car reduce nitrogen and and thermal loss in kiln.
7. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: there is the nitrogen discharge passage tunnel furnace preheating zone leading portion left and right sides, for the nitrogen after the discharging pre-heating heat-exchanging, the nitrogen input silica flour filtration cakes torrefaction machine of discharging.
8. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: the Cooling Section of Tunnel Kiln back segment arranges the cool nitrogen jet pipe, utilizes but product of nitrogen-making device residual nitrogen air cooling.
9. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: arrange 2--20 along the tunnel cave length direction and detect the hole, for detection of the reactor pressure temperature variations, and as reference, whole supporting unit is controlled automatically.
10. the tunnel cave with entrained-flow reactor discharging nitrogen production silicon nitride products based on silicon carbide according to claim 1, it is characterized in that: the raw material that burns till for tunnel cave is the binary sand of crystalline silicon processing waste mortar recovery and the nitrogen that entrained-flow reactor is discharged, binary sand grains footpath≤30um wherein, its composition is Si=40--20%, SiC=60--80%, Fe
2O
3≤ 0.1%; Nitrogen temperature≤1600 ℃, pressure 0.01～1.0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310024123.4A CN103115487B (en) | 2013-01-23 | 2013-01-23 | Tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310024123.4A CN103115487B (en) | 2013-01-23 | 2013-01-23 | Tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103115487A true CN103115487A (en) | 2013-05-22 |
| CN103115487B CN103115487B (en) | 2014-12-24 |
Family
ID=48413902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310024123.4A Expired - Fee Related CN103115487B (en) | 2013-01-23 | 2013-01-23 | Tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103115487B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141032A (en) * | 2018-09-06 | 2019-01-04 | 佛山市德力泰科技有限公司 | A kind of energy-efficient separating-type kiln car |
| CN109761556A (en) * | 2019-01-25 | 2019-05-17 | 北京瑞威世纪铁道工程有限公司 | Early high-strength quick tunnel anchor shaft anchor cable construction adhesive |
| CN110523295A (en) * | 2018-05-23 | 2019-12-03 | 美国分子工程股份有限公司 | Porous structure continuous production process and device |
| CN111747758A (en) * | 2019-03-28 | 2020-10-09 | 日本碍子株式会社 | Method for manufacturing ceramic product containing silicon carbide |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100308922B1 (en) * | 1998-11-20 | 2002-04-24 | 손재익 | Method of Manufacturing Silicon Nitride Bonded Silicon Carbide Composites by Silicon Nitriding Reaction |
| CN1858533A (en) * | 2005-05-03 | 2006-11-08 | 戴瑞乐 | Smelting tunnel kiln |
| CN102393139A (en) * | 2011-11-16 | 2012-03-28 | 杨桂玲 | Roller way type solar battery silicon wafer sintering furnace |
| CN102432296A (en) * | 2011-08-12 | 2012-05-02 | 尹克胜 | Comprehensive treatment technology of waste mortar in processing of photovoltaic crystalline silicon |
| CN102477510A (en) * | 2010-11-30 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for preparing nitrided ferrovanadium |
-
2013
- 2013-01-23 CN CN201310024123.4A patent/CN103115487B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100308922B1 (en) * | 1998-11-20 | 2002-04-24 | 손재익 | Method of Manufacturing Silicon Nitride Bonded Silicon Carbide Composites by Silicon Nitriding Reaction |
| CN1858533A (en) * | 2005-05-03 | 2006-11-08 | 戴瑞乐 | Smelting tunnel kiln |
| CN102477510A (en) * | 2010-11-30 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for preparing nitrided ferrovanadium |
| CN102432296A (en) * | 2011-08-12 | 2012-05-02 | 尹克胜 | Comprehensive treatment technology of waste mortar in processing of photovoltaic crystalline silicon |
| CN102393139A (en) * | 2011-11-16 | 2012-03-28 | 杨桂玲 | Roller way type solar battery silicon wafer sintering furnace |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523295A (en) * | 2018-05-23 | 2019-12-03 | 美国分子工程股份有限公司 | Porous structure continuous production process and device |
| CN110523295B (en) * | 2018-05-23 | 2021-10-08 | 美国分子工程股份有限公司 | Continuous production process and apparatus for porous structure |
| CN109141032A (en) * | 2018-09-06 | 2019-01-04 | 佛山市德力泰科技有限公司 | A kind of energy-efficient separating-type kiln car |
| CN109141032B (en) * | 2018-09-06 | 2024-04-09 | 佛山市德力泰科技有限公司 | Energy-saving separated kiln car |
| CN109761556A (en) * | 2019-01-25 | 2019-05-17 | 北京瑞威世纪铁道工程有限公司 | Early high-strength quick tunnel anchor shaft anchor cable construction adhesive |
| CN109761556B (en) * | 2019-01-25 | 2022-12-23 | 北京瑞威世纪铁道工程有限公司 | Adhesive for construction of early high-strength rapid tunnel anchor rod and anchor cable |
| CN111747758A (en) * | 2019-03-28 | 2020-10-09 | 日本碍子株式会社 | Method for manufacturing ceramic product containing silicon carbide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103115487B (en) | 2014-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103992099B (en) | Method for preparing environment-friendly honeycomb ceramic heat accumulator by use of waste slag | |
| CN102057239B (en) | Method for manufacturing a cement clinker, and cement clinker manufacturing facility | |
| CN103115487B (en) | Tunnel kiln producing silicon nitride and silicon carbide combined product with nitrogen discharged by entrained-flow bed reactor | |
| WO2010025620A1 (en) | Method and device for producing yellow phosphorus or phosphoric acid by vertical airtight smoke-baffle kiln | |
| CN102574741B (en) | Methods for recovery of CO2 gas in cement-manufacturing facilities, and processes for manufacturing cement | |
| CN101531351B (en) | Method for preparing yellow phosphorus by low or middle grade phosphorus ore | |
| CN102266693A (en) | Method and equipment for separating molten dust taken by high-temperature gas and application thereof | |
| CN100484868C (en) | Direct phosphorite reducing process for preparing high concentration phosphoric acid and coproducing silicate and aluminate products | |
| CN202869211U (en) | Multi-channel direct-firing tunnel kiln and waste heat recycling utilizing system thereof | |
| CN201116833Y (en) | Rectification composite type shaft kiln used for kiln method phosphoric acid | |
| CN105293497B (en) | A kind of hot method of oxygen smelts calcium carbide technique | |
| CN102442831A (en) | Preparation method of high-temperature smoke filter ceramic material with high thermal shock resistance | |
| CN105152141B (en) | A kind of gypsum relieving haperacidity thermal technology and device | |
| CN204265644U (en) | Heat storage type lime rotary kiln | |
| CN103539091B (en) | Method for preparing phosphoric acid by catalytic reduction of low-medium-grade phosphorite | |
| CN203728869U (en) | Coal-based direct-reduction iron-making device using vertical tank | |
| CN101307372A (en) | Device for manufacturing and reducing crust pellet and production process | |
| CN215162192U (en) | Magnesite electric light-burning shaft kiln | |
| CN214654500U (en) | Totally-enclosed multi-kiln series oxygen-fired lime and CO byproduct2In a device | |
| CN101749950B (en) | Air return type energy saving annular kiln for producing shale brick and production method | |
| CN204529668U (en) | A kind of device improving Combustion Efficiency of Coal Powder | |
| CN104002371B (en) | A kind of production technology utilizing limekiln using waste heat from tail gas coproduction air-entrained concrete building block | |
| CN101118116B (en) | Novel industrialization multi-channel type pushed-bat kiln for directly preparing phosphoric acid with phosphate ore | |
| CN201397051Y (en) | High-temperature slag ball cooling machine used in kiln phosphoric acid production | |
| CN202322714U (en) | Novel stamp-charging coke oven with wide coking chamber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: WUXI TUOHAI INVESTMENT CO., LTD. Free format text: FORMER OWNER: YIN KESHENG Effective date: 20140213 |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Wendong Inventor after: Yin Kesheng Inventor after: Yin Hongyi Inventor after: Yin Jiancheng Inventor after: Liu Hongliang Inventor after: Lu Yiping Inventor after: Zhu Haifei Inventor after: Zou Jianping Inventor before: Wang Wendong Inventor before: Yin Kesheng Inventor before: Yin Hongyi Inventor before: Yin Jiancheng Inventor before: Liu Hongliang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 276700 LINYI, SHANDONG PROVINCE TO: 214001 WUXI, JIANGSU PROVINCE Free format text: CORRECT: INVENTOR; FROM: ZHU WEIJIE MAO WEI ZHAO FENGZHONG LU YIPING ZHU HAIFEI TO: ZHU WEIJIE MAO WEI ZHAO FENGZHONG LU YIPING ZHU HAIFEI ZOU JIANPING LI MINGZHONG YANG LI |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20140213 Address after: 1206 room 159, No. 214001, Zhongshan Road, Jiangsu, Wuxi Applicant after: Wuxi maritime Investment Co. Ltd. Address before: 276700, Shandong County, Linshu province after the town of Dragon Village Applicant before: Yin Kesheng |
|
| ASS | Succession or assignment of patent right |
Owner name: QINGHAI TUOHAI NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: WUXI TUOHAI INVESTMENT CO., LTD. Effective date: 20140414 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214001 WUXI, JIANGSU PROVINCE TO: 810012 XINING, QINGHAI PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20140414 Address after: 810012 Qinghai province Xining Nanchuan Industrial Park Venture Road No. 26 Building No. 4 Applicant after: Qinghai Tuohai New Material Co., Ltd. Address before: 1206 room 159, No. 214001, Zhongshan Road, Jiangsu, Wuxi Applicant before: Wuxi maritime Investment Co. Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20170123 |