CN202947465U - Device for producing non-oxide composite - Google Patents
Device for producing non-oxide composite Download PDFInfo
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- CN202947465U CN202947465U CN 201220654863 CN201220654863U CN202947465U CN 202947465 U CN202947465 U CN 202947465U CN 201220654863 CN201220654863 CN 201220654863 CN 201220654863 U CN201220654863 U CN 201220654863U CN 202947465 U CN202947465 U CN 202947465U
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Abstract
The utility model discloses a device for producing a non-oxide composite. The device comprises a kiln and at least one saggar, wherein the saggar can be moved in or out of the kiln; at least one nitrogen inlet and at least one waste gas outlet are formed at the bottom of the saggar; the nitrogen inlets are communicated with nitrogen delivery pipes; the waste gas outlet is communicated with a waste gas exhaust pipe connected with the exterior of the kiln; the nitrogen inlets are used for filling nitrogen; and the waste gas outlet is used for exhausting waste gas generated during a product firing course. According to the device, as the nitrogen inlets and the waste gas outlet are formed in the saggar, a large amount of nitrogen is continuously filled in the saggar during the firing course, noxious gas in the saggar is driven away from the waste gas outlet, the problem that the purity of a nitrogen atmosphere is low during the firing course is solved, and the firing quality of the non-oxide composite is ensured. The device can be used for product firing in a shuttle kiln, a tunnel kiln and the like, the problems that the single kiln is small in capacity and low in yield in the prior art as the non-oxide composite can only be fired in a special nitriding furnace are solved, and the device is particularly suitable for firing the non-oxide composites such as silicon nitride combined silicon carbide.
Description
Technical field
The utility model relates to the refractory material production equipment, particularly a kind of device for the production of the non-oxidized substance composite.
Background technology
Along with the develop rapidly of China's metallurgy industry, driven the rapid progress of refractory material.The non-oxidized substance composite material has become noticeable novel refractory in recent years.With Si
3N
4, Si
2ON
2Owing to having high strength, high thermoconductivity, low thermal coefficient of expansion and the good advantages such as thermal shock resistance, alkali resistant class aggressivity, non-oxidizability, Corrosion resistance to carbon monoxide, anti-blast furnace slag aggressivity and high temperature abrasion resistance, the departments such as Iron industry, colored metallurgical industrial, ceramic industry, electronics industry and thermal power generation industry have been widely used in recent years with the Tercod of the match nitride bonded such as grand.
In these novel refractories, silicon nitride combined silicon carbide material is large with its density, intensity is high, good thermal shock stability, load softening point is high, thermal conductivity good, resistance value is high, and good anti-ice spar, aluminum fluoride are arranged, fluoridize and receive and the characteristics such as the fusing aggressivity such as calcirm-fluoride and non-oxidizability, play a part more and more can not replace in industries such as nonferrous metallurgy, steel-making steel rolling, ironmaking, heat treatments.Principle and the technique of producing silicon nitride combined silicon carbide are: take carborundum as aggregate, add metallic silicon power, and select rational particle level and moulding process, the goods base substrate burns till in nitrogen atmosphere, produces a kind of by α-Si
3N
4, β-Si
3N
4With a small amount of free Si and Si
2ON
2Be substrate composed refractory material.It is the committed step of making silicon nitride combined silicon carbide material that nitrogenize is burnt till, because the product that burns till is mainly as refractory material, it uses under the condition of heating and cooling repeatedly, free Si in silicon nitride combined silicon carbide material can make product crack, cause fracture, affect its service life, must guarantee that therefore material step-reaction under nitrogen atmosphere is complete, just can make the content of free Si in product be down to minimum.Complete in order to guarantee material step-reaction under nitrogen atmosphere, the kiln that burns till silicon nitride combined silicon carbide must have extraordinary sealing, prior art is burnt till required sealing requirements in order to reach, that all kinds of nitriding furnaces comprise is electrically heated, fuel oil or gas heating, it is smaller that its capacity designs usually, in order to overcome the harmful effect that sealing is caused owing to expanding with heat and contract with cold.So just must build a large amount of little nitriding furnaces when producing in a large number this series products, productive rate is low, production cost is high, is unsuitable for large-scale industrialization production.
Saggar of the prior art is a kind of container that at high temperature uses, and is the special refractory that supports, protects ceramic or hold burned product.Its Main Function is that (one) prevents institute's burned product that holds in sintering process, because polluting and defective with contacting with erosion of burning gases and dust; (2) be to play to take up and the support effect in kiln, to improve setting density, facilitate the firing operation.
The saggar General Requirements has following performance: (one) high fire resistance, good heat endurance and chemical stability; (2) normal temperature and elevated temperature strength are large, and one of effect of saggar is exactly load-bearing, and its intensity must withstand goods and the load of self; (3) good thermal conductivity and low heat storing; (4) outward appearance consolidation, size are accurate.
The utility model content
For this reason, the purpose of this utility model be to propose a kind of be suitable for suitability for industrialized production non-oxidized substance composite especially carborundum in conjunction with silicon nitride material device used.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is as follows:
A kind of device for the production of the non-oxidized substance composite, comprise that kiln and at least one can move into or shift out the saggar of kiln, be provided with at least one nitrogen inlet and a waste gas outlet at the bottom of the saggar of described saggar, described nitrogen inlet is communicated with the nitrogen carrier pipe, and the described waste gas outlet exhaust emission tube outer with being connected to kiln is communicated with.
Above-mentioned device for the production of non-oxide composite also comprises a transfer equipment that is used for described saggar is moved into or shifts out described kiln.
Above-mentioned device for the production of non-oxide composite, described transfer equipment is kiln car.
Above-mentioned device for the production of the non-oxidized substance composite, at least one described saggar is built by laying bricks or stones on the kiln vehicle surface of described kiln car.
Above-mentioned device for the production of the non-oxidized substance composite also is provided with one and is used for the bleeding point of the extraction of the flue gas in kiln at the middle part of described kiln vehicle surface.
Above-mentioned device for the production of the non-oxidized substance composite is provided with the pad brick between described saggar and described kiln vehicle surface, is provided with the space between the adjacent pads brick.
Above-mentioned device for the production of the non-oxidized substance composite, the saggar lid of described saggar is comprised of the length easy-to-dismount front arch of n piece identical with described saggar lid width, and wherein n is more than or equal to 1.
Above-mentioned device for the production of the non-oxidized substance composite, on any one in four saggar walls of described saggar or saggar top blind flange place has the wicket of the goods that need to burn till of being used for packing into.
Above-mentioned device for the production of the non-oxidized substance composite, the thickness of saggar wall is 80mm～150mm.
Above-mentioned device for the production of the non-oxidized substance composite, the length of described saggar are 1500～2500mm, and width is 500～1500mm, are highly 500～2000mm.
technique scheme of the present utility model has the following advantages compared to existing technology, (1) proposition of the device for the production of the non-oxidized substance composite of the present utility model, make the non-oxidized substance composite especially silicon nitride combined silicon carbide material at industrial shuttle kiln commonly used, burning till of tunnel cave etc. become reality, shuttle kiln, the volume of the kilns such as tunnel cave is large, once burning till product than nitriding furnace Duos more than 3 times, ton burns till cost 1000 yuan of left and right, thereby reduced widely the cost of producing this series products, improved the output of this series products, be suitable for large-scale industrialization production, (2) design of nitrogen inlet and waste gas outlet in saggar of the present utility model, make nitrogen a large amount of in sintering process constantly be passed in saggar, pernicious gas in saggar is driven away from waste gas outlet, solve the purity problem of nitrogen atmosphere in the sintering process, thereby guaranteed the quality of burning till of product, (3) saggar of the present utility model adopts the brick masonry of silicon nitride combined silicon carbide material, not only thermal conductivity is good, can guarantee that the temperature in saggar is even, and the brick of silicon nitride combined silicon carbide material mutually between agglutinating property good especially, guaranteed the sealing of saggar, in addition, smear with chamotte at the brickwork joint place between brick, has further guaranteed the air-tightness of saggar, in addition, the brick of employing silicon nitride combined silicon carbide material can also extend the service life of described saggar, and described saggar can use more than 20 times continuously, (4) design in space between face pad brick and pad brick under the utility model saggar, the circulation of high-temperature gas when helping to burn till.
Description of drawings
For content of the present utility model is more likely to be clearly understood, the below is described in further detail the utility model, wherein according to specific embodiment of the utility model also by reference to the accompanying drawings
Fig. 1 is the structural representation of an embodiment of saggar of the present utility model and kiln car;
Fig. 2 is nitrogen inlet at the bottom of the saggar of saggar of the present utility model and the schematic diagram of waste gas outlet;
Fig. 3 is the schematic diagram of the pad brick below saggar of the present utility model;
Fig. 4 is pad brick below saggar of the present utility model and the connection diagram at the bottom of saggar;
Fig. 5 is the structural representation of another embodiment of saggar of the present utility model and kiln car;
Fig. 6 is the interconnected structural representation of sagger brick of the double buckle of saggar of the present utility model;
Fig. 7 is structural representation of building two saggars on a kiln car by laying bricks or stones of the present utility model.
1-saggar wherein; The 2-kiln vehicle surface; 3-saggar lid; At the bottom of the 4-saggar; 5-saggar wall; 6-nitrogen carrier pipe; The 7-exhaust emission tube; The 8-kiln car; 9-pad brick; The 10-bleeding point.
The specific embodiment
A kind of device for the production of the non-oxidized substance composite of the present utility model comprises kiln, kiln car 8 and builds at least one saggar 1 on kiln car 8 by laying bricks or stones, and described kiln car 8 is used for described saggar 1 is moved into or shift out described kiln.
Fig. 1 is the structural representation of an embodiment of saggar 1 of the present utility model and kiln car 8, described saggar 1 is built by laying bricks or stones on kiln vehicle surface 2, it comprises saggar lid 3, 4 and four saggar walls 5 at the bottom of saggar, wherein, described saggar lid 3 is comprised of length five easy-to-dismount front arch identical with described saggar lid 3 width, below referring to Fig. 2, Fig. 3 and Fig. 4, also be provided with two nitrogen inlets and a waste gas outlet on 4 at the bottom of the saggar of described saggar 1, described two nitrogen inlets are connected with two nitrogen input pipes 6 on kiln car 8 respectively, waste gas outlet is connected with exhaust emission tube 7 on kiln car 8, described nitrogen inlet is used for input nitrogen, described waste gas outlet is used for discharging the waste gas that the interior product sintering process of saggar 1 produces, also be provided with one deck pad brick 9 between described saggar 1 and kiln vehicle surface 2, leave the space, the circulation that is designed with high-temperature gas when helping burn till of described pad brick 9 between pad brick 9, in addition, also being provided with one at the middle part of described kiln vehicle surface 2 is used for the bleeding point 10 of the extraction of the waste gas in kiln.
when using the described saggar 1 of the present embodiment, in the goods that first needs burnt till are packed described saggar 1 into from described saggar 1 top, cover saggar lid 3, then be put on the carborundum chamotte on the brickwork joint of described saggar lid 3 and the interface of described saggar lid 3 and saggar wall 5, again block there is the kiln car 8 of described saggar 1 to push in kiln, with 4 nitrogen inlet at the bottom of described saggar and waste gas outlet respectively with kiln car on nitrogen input pipe 6 and exhaust emission tube 7 connect, can carry out product burns till, after burning-out, pry open the front arch of saggar lid 3, from top, the product that burns till is taken out and get final product.
Fig. 5 is the structural representation of another embodiment of saggar of the present utility model and kiln car, and the difference of its structure and structure shown in Figure 1 only is, its saggar lid 3 seals, and has a wicket on one of them of four saggar walls 5 of described saggar 1.
When using the described saggar 1 of the present embodiment, the goods that needs are burnt till install from wicket puts into saggar 1, then with the silicon nitride combined silicon carbide material brick, described wicket is sealed, then spread the carborundum chamotte on the brickwork joint of described saggar wall 5, at last block there is the kiln car 8 of described saggar 1 to push in kiln, with 4 nitrogen inlet at the bottom of described saggar and waste gas outlet pipeline respectively with kiln car under nitrogen input pipe 6 and exhaust emission tube 7 in kiln connect, can carry out product burns till, knock wicket open after burning down, get final product from the wicket brick output.
Certainly except Fig. 1 and shown in Figure 5 can described saggar being moved into or shift out described kiln by kiln car, can also use other transfer equipment, as by conveyer etc.
Below introduce the manufacture method of saggar of the present utility model by specific embodiment.
The first step: carborundum and metallic silicon proportioning by a certain percentage, the technique of mixing according to silicon nitride combined silicon carbide material is carried out batch mixing, then punch forming be 300 * 100 * 80mm be used for build the double buckle sagger brick of saggar wall 5 by laying bricks or stones (referring to Fig. 6, the double buckle of described double buckle sagger brick is circular arc), the front arch that is used for building by laying bricks or stones the saggar lid of 500 * 350 * 65mm, after described double buckle sagger brick and front arch oven dry under special nitrogenize equipment nitrogenize burn till.The silicon nitride content that burns till rear product is 35%, and carborundum content is 60%.
Second step: build kiln car 8 by laying bricks or stones, kiln vehicle surface 2 size 2000 * 900mm, three diameter 80mm on pre-buried on kiln car 8, length 800mm corundum pipeline, wherein two is that 6, one of nitrogen input pipes are exhaust emission tube 7, and described alundum tube pipeline outer wall wraps up with castable refractory.
The 3rd step: build pad brick 9 by laying bricks or stones on kiln car 8, size 200 * 200 * 200mm of pad brick 9, and at the bottom of tiling one deck silicon nitride combined silicon carbide syphon on pad brick 9 is as saggar 4, monolithic syphon size 520 * 400 * 80mm.
The 4th step: building saggar wall 5 by laying bricks or stones, the thickness 80mm of saggar wall 5 on 4 at the bottom of described saggar.The length 1500mm of saggar, width 500mm is highly 500mm, and the brickwork joint between sagger brick is spread with the carborundum chamotte, and in described carborundum chamotte, the content of carborundum is 50%.
The 5th step: 4 ones repave the described silicon nitride combined silicon carbide syphon of one deck at the bottom of saggar, note to guarantee that nitrogen inlet and waste gas outlet can not be plugged, then use and brickwork joint is all watered full with same carborundum chamotte of the 4th step.
The 6th step: the kiln car 8 that puzzles saggar 1 is shifted onto shuttle-type kiln drying and pre-burning, and firing temperature is 1400 ℃, burns rear saggar 1 and can use.
Need to prove, repave the effect of one deck silicon nitride combined silicon carbide syphon at the bottom of described saggar, one is in order to guarantee the sealing of described saggar 1, and it two plays the load-bearing effect, and following examples effect is identical, repeats no more.
The first step: carborundum and metallic silicon proportioning by a certain percentage, the technique of mixing according to silicon nitride combined silicon carbide material is carried out batch mixing, punch forming is the double buckle sagger brick that is used for building by laying bricks or stones saggar wall 5 of 350 * 230 * 100mm, the front arch that is used for building by laying bricks or stones the saggar lid of 1000 * 350 * 65mm, after oven dry under special nitrogenize equipment nitrogenize burn till.The silicon nitride content that burns till rear product is 23%, and carborundum content is 72%.
Second step: build kiln car 8 by laying bricks or stones, kiln vehicle surface 2 size 2600 * 2400mm, 6 diameter 60mm on pre-buried on kiln car 8, length 800mm heat-resistance stainless steel pipeline, wherein pipeline is done protection with the refractory material parcel.
The 3rd step: build pad brick 9 by laying bricks or stones on kiln car 8, pad brick 9 size 450 * 150 * 150mm, and at the bottom of tiling one deck silicon nitride combined silicon carbide syphon on pad brick 9 is as saggar 4, monolithic syphon size 520 * 400 * 80mm.
The 4th step: building saggar wall 5 by laying bricks or stones, the thickness 100mm of saggar wall 5 on 4 at the bottom of described saggar.The length 2200mm of saggar, width 1000mm is highly 2000mm, can build two saggars on a kiln car, guaranteeing has two nitrogen inlets and a waste gas outlet below each saggar 1, and the brickwork joint between sagger brick is spread with the carborundum chamotte, and in described carborundum chamotte, the content of carborundum is 60%.
The 5th step: repaving the described silicon nitride combined silicon carbide syphon of one deck on 4 at the bottom of saggar, noticing guaranteeing that nitrogen inlet and waste gas outlet can not be plugged, then with described carborundum chamotte, brickwork joint is all being watered and expire.
The 6th step: the kiln car 8 that puzzles saggar 1 is shifted onto shuttle-type kiln drying and pre-burning, and 1400 ℃ of firing temperatures burn rear saggar 1 and can use, and the structural representation of described saggar 1 is seen Fig. 7.
The first step: carborundum and metallic silicon proportioning by a certain percentage, the technique of mixing according to silicon nitride combined silicon carbide material is carried out batch mixing, punch forming is the double buckle sagger brick that is used for building by laying bricks or stones the saggar wall of 350 * 230 * 150mm, the front arch that is used for building by laying bricks or stones the saggar lid of 1500 * 350 * 70mm, after oven dry under special nitrogenize equipment nitrogenize burn till.The silicon nitride content that burns till rear product is 15%, and carborundum content is 80%.
Second step: build kiln car 8 by laying bricks or stones, kiln vehicle surface 2 size 3000 * 1900mm, three diameter 60mm on pre-buried on kiln car 8; length 800mm heat-resistance stainless steel pipeline; wherein two is that 6, one of nitrogen input pipes are exhaust emission tube 7, and pipeline is done protection with the refractory material parcel.
The 3rd step: build pad brick 9 by laying bricks or stones on kiln car 8, pad brick 9 size 200 * 200 * 200mm, and at the bottom of tiling one deck silicon nitride combined silicon carbide syphon on pad brick 9 is as saggar 4, monolithic syphon size 520 * 400 * 75mm.
The 4th step: build saggar wall 5 by laying bricks or stones, the thickness 150mm of saggar wall 5 at the double buckle sagger brick that makes with the first step on 4 at the bottom of described saggar.The length 2500mm of saggar, width 1500mm is highly 1200mm, and the brickwork joint between sagger brick is spread with the carborundum chamotte, and in described carborundum chamotte, the content of carborundum is 70%.Reserve the wicket of 400 * 600mm in the one side of saggar.
The 5th step: repaving one deck silicon nitride combined silicon carbide syphon on 4 at the bottom of saggar, good with what do not burn till, notice guaranteeing that breather line can not be plugged, then with carborundum chamotte slurry, brickwork joint is all watered completely, front arch is covered on saggar 1 seal with chamotte.
The 6th step: the kiln car 8 that puzzles saggar 1 is shifted onto shuttle-type kiln drying and pre-burning, and 1500 ℃ of firing temperatures burn rear saggar 1 and can use.
In above three embodiment, the double buckle of building saggar wall double buckle sagger brick used by laying bricks or stones also can be tapered in form.Building in addition syphon at the bottom of saggar and the front arch of saggar lid by laying bricks or stones can be also the double buckle brick.Certain saggar of the present utility model also can all use the plane brick to build by laying bricks or stones, notices when building by laying bricks or stones that the full of chamotte gets final product.
Need to prove to disclose the technical scheme of building two saggars on a kiln car by laying bricks or stones in embodiment 2, certainly according to the size of actual kiln and kiln car, can also build a plurality of saggars by laying bricks or stones on a kiln car, depending on actual conditions.
The proposition of the device for the production of the non-oxidized substance composite of the present utility model, make the non-oxidized substance composite especially silicon nitride combined silicon carbide material become reality burning till of industrial shuttle kiln commonly used, tunnel cave etc., the volume of the kiln such as shuttle kiln, tunnel cave is large, once burning till product than nitriding furnace Duos more than 3 times, ton burns till cost 1000 yuan of left and right, thereby reduced widely the cost of producing this series products, improved the output of this series products, be suitable for large-scale industrialization production;
Saggar of the present utility model adopts the brick masonry of silicon nitride combined silicon carbide material, not only thermal conductivity is good, can guarantee that the temperature in saggar is even, and the brick of silicon nitride combined silicon carbide material mutually between agglutinating property good especially, guaranteed the sealing of saggar, in addition, smear with chamotte at the brickwork joint place between brick, has further guaranteed the air-tightness of saggar.
The design of nitrogen inlet and waste gas outlet in saggar of the present utility model, make nitrogen a large amount of in sintering process constantly be passed in saggar, pernicious gas in saggar is driven away from waste gas outlet, solve the purity problem of nitrogen atmosphere in the sintering process, thereby guaranteed the quality of burning till of product.
The design in space between face pad brick and pad brick under the utility model saggar, the circulation of high-temperature gas when helping to burn till.
Saggar long service life of the present utility model can be used more than 20 times continuously.
Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (10)
1. device for the production of the non-oxidized substance composite, comprise that kiln and at least one can move into or shift out the saggar of kiln, it is characterized in that: be provided with at least one nitrogen inlet and at least one waste gas outlet at the bottom of the saggar of described saggar, described nitrogen inlet is communicated with the nitrogen carrier pipe, and the described waste gas outlet exhaust emission tube outer with being connected to kiln is communicated with.
2. the device of the non-oxide composite of production according to claim 1, is characterized in that: also comprise a transfer equipment that is used for described saggar is moved into or shifts out described kiln.
3. the device of the non-oxide composite of production according to claim 2, it is characterized in that: described transfer equipment is kiln car.
4. the device for the production of the non-oxidized substance composite according to claim 3, it is characterized in that: at least one described saggar is built by laying bricks or stones on the kiln vehicle surface of described kiln car.
5. the device for the production of the non-oxidized substance composite according to claim 4, is characterized in that: also be provided with one at the middle part of described kiln vehicle surface and be used for the bleeding point of the extraction of the flue gas in kiln.
6. the device for the production of the non-oxidized substance composite according to claim 4, is characterized in that: be provided with the pad brick between described saggar and described kiln vehicle surface, be provided with the space between the adjacent pads brick.
7. the device for the production of the non-oxidized substance composite according to claim 6 is characterized in that: the saggar lid of described saggar covers the identical easy-to-dismount front arch of n piece of width by length and described saggar and forms, and wherein n is more than or equal to 1.
8. the described device for the production of the non-oxidized substance composite of according to claim 1-7 any one is characterized in that: on any one in four saggar walls of described saggar or saggar top blind flange place has the wicket of the goods that need to burn till of being used for packing into.
9. the device for the production of the non-oxidized substance composite according to claim 8, it is characterized in that: the thickness of saggar wall is 80mm～150mm.
10. the described device for the production of the non-oxidized substance composite of according to claim 1-7 any one, it is characterized in that: the length of described saggar is 1500～2500mm, width is 500～1500mm, is highly 500～2000mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220654863 CN202947465U (en) | 2012-12-03 | 2012-12-03 | Device for producing non-oxide composite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220654863 CN202947465U (en) | 2012-12-03 | 2012-12-03 | Device for producing non-oxide composite |
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| CN202947465U true CN202947465U (en) | 2013-05-22 |
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ID=48423163
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| CN 201220654863 Expired - Fee Related CN202947465U (en) | 2012-12-03 | 2012-12-03 | Device for producing non-oxide composite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094969A (en) * | 2019-05-17 | 2019-08-06 | 中钢集团耐火材料有限公司 | It is a kind of for nitrogenizing the energy-saving environmental protection device of organic compound combustion in kiln |
-
2012
- 2012-12-03 CN CN 201220654863 patent/CN202947465U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094969A (en) * | 2019-05-17 | 2019-08-06 | 中钢集团耐火材料有限公司 | It is a kind of for nitrogenizing the energy-saving environmental protection device of organic compound combustion in kiln |
| CN110094969B (en) * | 2019-05-17 | 2024-02-06 | 中钢洛耐科技股份有限公司 | Energy-saving and environment-friendly device for burning organic matters in nitriding kiln |
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