CN116558276A - Push plate type double-tube reduction furnace - Google Patents
Push plate type double-tube reduction furnace Download PDFInfo
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- CN116558276A CN116558276A CN202211735636.1A CN202211735636A CN116558276A CN 116558276 A CN116558276 A CN 116558276A CN 202211735636 A CN202211735636 A CN 202211735636A CN 116558276 A CN116558276 A CN 116558276A
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- furnace
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- boat
- push plate
- plate type
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- 230000009467 reduction Effects 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims description 18
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 239000011819 refractory material Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000010941 cobalt Substances 0.000 abstract description 4
- 229910017052 cobalt Inorganic materials 0.000 abstract description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052721 tungsten Inorganic materials 0.000 abstract description 2
- 239000010937 tungsten Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- 239000011449 brick Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000011733 molybdenum Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/08—Arrangements of linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
- F27D1/0009—Comprising ceramic fibre elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
- F27D1/06—Composite bricks or blocks, e.g. panels, modules
- F27D1/063—Individual composite bricks or blocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1858—Doors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to a push plate type double-tube reduction furnace, which comprises two furnace tubes of a double-tube furnace, wherein a hearth of each furnace tube is heated by 4 belts, each belt consists of an upper heating zone, a middle heating zone and a lower heating zone, and each heating zone is of a hollow structure. The equipment has small occupied area, reliable operation, high reduction yield and good product quality. The control is accurate, safe and stable, the labor intensity of operators is greatly reduced, the production and operation of multiple devices by one person are realized, and the device can be applied to more fields, such as tungsten reduction, cobalt reduction, superfine cobalt reduction and the like.
Description
Technical Field
The invention belongs to the technical field of reduction furnaces.
Background
At present, the primary reduction equipment of molybdenum trioxide is commonly used in China and is a four-tube furnace or a push plate type single-tube furnace. The four-tube furnace is weighed material and goes into and out of the boat and all needs manual operation, the boat loading weight of each boat is about 5KG, the labor intensity of workers is relatively high, the production yield of the four-tube furnace is low, the current four-tube furnace cannot meet the current production demand, the sealing performance of the four-tube furnace is poor again, the use structure is a single furnace door, the hydrogen consumption is high (the hydrogen consumption per ton is about 200), ammonia generated by reduction is leaked in the air, equipment is severely corroded, and meanwhile, serious harm is generated to a human body. In addition, the push plate type single-tube furnace has higher automation degree, but the capacity is insufficient because only one furnace tube is provided, so that the requirement cannot be met. Finally, different operators have different skills and operation habits, so that the quality control and the production safety of the products are difficult to ensure. Therefore, by combining the above points, I have a need to develop a fully automatic push plate type double-tube reduction furnace.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a push plate type double-tube reduction furnace, and in order to solve the technical problems, the invention adopts the following technical scheme:
a double-tube reduction furnace, two boiler tubes of double-tube furnace are arranged from top to bottom, and each boiler tube hearth adopts 4 zones of heating, and each zone is composed of an upper heating zone, a middle heating zone and a lower heating zone, and each temperature zone is of a hollow structure.
The floor area of the vertical arrangement device is smaller than that of the horizontal arrangement device. The width of the furnace body needs to be widened by at least 1200mm when the furnace body is horizontally arranged; the two furnace tubes are not long, and the double furnace door structure is more complicated. The two furnace tubes are horizontally arranged, so that one furnace tube needs to be opened from the bottom, the opening size is at least more than 620mm multiplied by 620mm, the atmosphere of the outer bin is suddenly changed after the outer furnace door is opened, the consumption of hydrogen is about 5 times of that of the vertical arrangement, in addition, ammonia can be quickly leaked into the air, and the positive pressure state of the outer bin is difficult to ensure. As no partition wall exists between the heating belts, the temperature uniformity in the temperature area can be improved, and the mutual influence of the temperatures between the belts can be reduced.
The heating area is refractory material and samming material brickwork, the masonry structure is three-layer heating member and lays four-layer carborundum samming board, and the heating member structural style is banded plane radiation heating arrangement, and the boiler tube tiling is on carborundum board, and boiler tube and carborundum board are supported by pouring supporting beam. The heating element material of the heating belt is 0Cr21Al6Nb, and the arrangement of the heating element in the structural form has higher heat efficiency and has the advantage of energy conservation. The furnace tubes are uniformly distributed on the silicon carbide plate, so that the furnace tubes can be prevented from bending deformation. The refractory materials are selected from high-alumina bricks, silicon carbide plates, high-alumina supporting bricks, high-alumina supporting beams, high-alumina fiber bricks, high-alumina blankets and the like, so that the refractory materials are not cracked under the high temperature condition of the furnace, and the furnace has good temperature uniformity under the high temperature condition.
Further improved, the furnace lining heat-insulating structure of the reduction furnace consists of a furnace roof and heat-insulating areas at two sides, and microporous heat-insulating plates, aluminum silicate fiber blankets and the like can be selected. Because the light fiber material is adopted, the heat conductivity is small, the heat insulation effect is good, and the heat preservation and energy conservation are realized.
Further improvement is that the boat is square, the outline dimension of the boat is 620mm multiplied by 620mm, the height is 75mm, the inner cavity dimension is 600mm multiplied by 600mm, and the depth is 50mm. The material is GH3128 high-temperature corrosion-resistant alloy. The structure is more suitable for automatic operation, has interchangeability, and the boat depth is compatible with dust raising and powder leakage, and is suitable for the change of the subsequent process.
A further improvement is that the boat is placed in a boat carrier. The inner cavity of the bracket is matched with the outer wall of the boat in size, the boat and the bracket are fixed by screws, and the bottom of the bracket is hollow grid-shaped. When the boat is fed into the reduction furnace in the prior art, the boats are directly pushed, the boats are stressed, the boats are extruded at the temperature of 650 ℃ and are easy to deform, the deformation of the boats is large, the distribution is uneven, and the boats are easy to block after long-term use. By adding the bracket, the bracket bears all stress and ensures the geometric dimension of the boat. The bracket is simple to manufacture, low in cost and convenient to replace, and deformation and boat blockage can not occur. In order to avoid pollution to materials, the bracket is made of 2520 heat-resistant stainless steel (the same material as the furnace tube), and the bracket is preferably cast. The boat and the bracket are fixed by screws, so that the maintenance and the replacement are convenient. The bottom of the bracket is hollow grid-shaped, so that the weight is reduced, and the compressive strength is increased.
The further improvement is that the furnace end and the furnace tail of the reduction furnace are of a double furnace door structure, wherein the outer furnace door is fixedly connected with the air cylinder, and pull rod springs fixedly connected with the furnace body are arranged on two sides of the furnace door. The opening and closing of the outer furnace door is powered by the air cylinder, and when the air cylinder stops supplying power, the sealing of the furnace door can be ensured by the tensile force of the spring, so that double protection is achieved.
The further improvement is that the inner furnace door is made of 2520 heat-resistant stainless steel, the thickness of the furnace door is 20mm, the surface of the furnace door is provided with reinforcing ribs, and the furnace door is movably connected with the rotating shaft through a U-shaped hinge. The inner furnace door with the structure can effectively strengthen the bending strength of the furnace door, overcome the deformation of the furnace door caused by high temperature and seriously influence the tightness of the furnace door. The inner door is the main barrier for blocking the atmosphere, and if the sealing is poor, the fluctuation of the atmosphere in the furnace is large when the outer door is opened. The rotary shaft is movably connected with the furnace door through the U-shaped hinge, so that the sealing surface can be automatically leveled, and the sealing surface is fixed by the jackscrew after leveling, thereby effectively solving the sealing defect caused by machining errors.
Compared with the prior art, the invention has the following beneficial effects:
push plate type double-tube reduction furnace according to MoO 3 MoO is prepared from the powder by hydrogen reduction 2 The key equipment for primary molybdenum reduction is developed according to the technical requirements of the powder process, and the equipment has the advantages of small occupied area, reliable operation, high reduction yield and good product quality. The control is accurate, safe and stable, the labor intensity of operators is greatly reduced, the production and operation of multiple devices by one person are realized, and the device can be applied to more fields, such as tungsten reduction, cobalt reduction, superfine cobalt reduction and the like.
Drawings
FIG. 1 is a schematic view of an outer oven door structure of the present invention;
FIG. 2 is a schematic view of the structure of the inner furnace door.
FIG. 3 is a schematic structural view of the furnace lining.
Fig. 4 is a left side view of fig. 3.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following technical scheme of the present invention will be further described with reference to the accompanying drawings and examples.
Example 1
The push plate type double-tube reduction furnace as shown in fig. 1 to 4, the equipment main body comprises a boat structure, a furnace end and furnace tail double-furnace door structure, a furnace tube structure and a furnace lining heat preservation structure.
1. Boat structure
The furnace tube of the four-tube furnace is small, the boat size is only 360mm multiplied by 273mm multiplied by 42mm, and the product burned out of the molybdenum trioxide with the thickness of the material layer of about 25mm in the primary reduction process is found to be not hardened according to the process exploration, but the thickness of the boat loading amount reaches 36mm to meet the current production requirement, so that the burned molybdenum dioxide is seriously hardened, the crystal phase is coarse and different, and the progress of the next process is not facilitated. The boats are directly pushed, the force is applied between the boats, the boat materials are 3128, the boats are easy to deform when being extruded at the temperature of 650 ℃, the deformation of the boats is large, the distribution is uneven, and the boats are easy to be blocked.
The cross section of the boat is designed to be 600mm multiplied by 600mm (square is more suitable for automatic operation and has interchangeability), the depth of the boat is 50mm when the boat is designed according to the thickness of 2 times of the material layer in consideration of dust raising, powder leakage and the change of the subsequent process. The outer layer of the boat is provided with the boat bracket, so that the service life of the boat is ensured, the automatic operation is stable, the bracket bears all stress effects, and the geometric dimension of the boat is ensured. In order to avoid pollution to materials, the bracket is made of 2520 (the same material as the furnace tube) and is formed by pouring. The boat and the bracket are fixed by screws, so that the maintenance and the replacement are convenient. The bottom of the bracket is in a rib plate type hollowed-out grid shape, so that the weight is reduced, and the compressive strength is increased.
2. Double furnace door structure
Because the furnace door of the four-tube furnace is in a single furnace door structure, various defects such as high hydrogen consumption, ammonia leakage and blasting safety risk exist, the furnace end and the furnace tail of the full-automatic push plate type double-tube (molybdenum) reduction furnace are both in an inner and outer double furnace door structure, and the concept of the double furnace door structure is widely applied to a continuous molybdenum wire carbonization furnace and a high-temperature graphite circular tube carbonization furnace, so that the furnace is a mature application. However, the double furnace door structure is different from other structures, and the sealing difficulty is also conceivable because the furnace door is far larger than other devices because of the large boat size.
2.1 outer door Structure
The sealing structure of the outer door is similar to a four-pipe reduction furnace, the opening and closing of the furnace door are powered by the air cylinder, and two pull rod springs are added on two sides of the furnace door.
2.2 inner door Structure
The sealing of the inner door takes into account the deformation of the oven door caused by the high temperature, and the inner door is a main barrier for blocking the atmosphere. The inner door is seriously deformed during high-temperature debugging of the equipment, the sealing is not achieved, the furnace atmosphere fluctuation is large when the outer door is opened, and the inner door is designed again by combining the past experience. The material is 2520, the thickness of the furnace door is increased from 15mm to 20mm, and reinforcing ribs are added on the surface of the furnace door to strengthen the bending strength of the furnace door. The rotary shaft is movably connected with the furnace door through the U-shaped hinge, so that the sealing surface can be automatically leveled, and the sealing surface is fixed by the jackscrew after leveling, thereby effectively solving the sealing defect caused by machining errors.
3. Furnace tube structure
According to the operation condition of the on-site four-tube furnace, the boat moves in the furnace tube to directly contact with the bottom of the furnace tube due to small space of the furnace tube, so that the service lives of the furnace tube and the boat are greatly influenced; in addition, in molybdenum reduction, molybdenum reduction belongs to exothermic reaction, a large amount of heat and steam are generated, and a large amount of heat generated in the prior art cannot be timely discharged out of a furnace tube, so that the temperature of the reaction cannot be accurately controlled, the product quality is uneven, and the steam precooling Cheng Shuizhu at the furnace outlet end is easy to fall in a boat; finally, the furnace tube is welded by adopting plates to form a rectangle, the strength of the furnace tube is low at high temperature, the furnace tube is easy to deform, and the situation of blocking the boat is easy to occur. In combination with the defects, the furnace tube adopts a horseshoe shape, the top is a large arc, the top space of the boat and the furnace tube is increased, and meanwhile, formed water drops can flow to two sides along the arc wall, so that the drying of materials in the boat is ensured. Secondly, in order to increase the bending strength of the furnace tube at high temperature, the bottom of the horseshoe-shaped furnace tube is designed into a corrugated hem, and two guide rails are welded on the bottom surface of the corrugated to avoid direct contact friction between the boat and the furnace tube, so that the guide rails are in contact with the boat, the service life of the furnace tube is effectively prolonged, and finally, a heat dissipation space is formed between the bottom of the boat and the bottom plate due to the guide rails, and heat dissipation in molybdenum reduction can be accelerated through the space.
4. Furnace lining heat insulation structure
The two furnace tubes of the double-tube furnace are vertically arranged up and down, the hearth is heated by 4 belts, each belt is composed of an upper heating temperature zone, a middle heating temperature zone and a lower heating temperature zone, each temperature zone is of a hollow structure, and partition walls are not arranged between the heating belts, so that the temperature uniformity in the temperature zones is improved, and the mutual influence of the temperatures between the belts is reduced.
The heating area is mainly made of refractory material and uniform temperature material masonry. Because the highest temperature in the furnace is 750 ℃, the materials are selected from high-alumina bricks, silicon carbide plates, high-alumina support bricks, high-alumina support beams, high-alumina fiber bricks, high-alumina blankets and the like, so that the refractory materials of the furnace are not cracked at high temperature and have good temperature uniformity at high temperature. The masonry structure is formed by three layers of heating and four layers of silicon carbide temperature-equalizing plates are laid to ensure uniformity and consistency of furnace temperature. The furnace tube is tiled on the silicon carbide plate, the furnace tube and the silicon carbide plate are supported by the pouring support beam, and the pouring support beam adopts heat-resistant stainless steel as a framework.
The heat-insulating layer contains furnace top and heat-insulating areas at two sides, and is composed of microporous heat-insulating plate, aluminium silicate fibre blanket and aluminium silicate fibre blanket. The heat insulation material is made of light fiber materials, has small heat conductivity, good heat insulation effect and energy conservation. A heating element: the material is 0Cr21Al6Nb, and the heating element is arranged in a band-shaped plane radiation heating mode, so that the heating element has higher heat efficiency and has the advantage of energy conservation.
The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (8)
1. A push pedal type double-tube reduction furnace is characterized in that: comprising the following steps: the two furnace tubes of the double-tube furnace are arranged up and down, the hearth of each furnace tube adopts 4 zones for heating, each zone consists of an upper heating zone, a middle heating zone and a lower heating zone, and each heating zone is of a hollow structure.
2. The push plate type double-tube reducing furnace according to claim 1, wherein: the heating zone is a refractory material and a temperature-equalizing material masonry, the masonry structure is a three-layer heating body and is laid with four layers of silicon carbide temperature-equalizing plates, the heating body is in a strip-shaped plane radiation heating arrangement, the furnace tubes are laid on the silicon carbide plates in a flat mode, and the furnace tubes and the silicon carbide plates are supported by a pouring support beam.
3. The push plate type double-tube reducing furnace as claimed in claim 2, wherein: the furnace lining heat preservation structure of the reduction furnace consists of a furnace top and heat preservation areas at two sides.
4. The push plate type double-tube reducing furnace according to claim 1, wherein: the furnace end and the furnace tail of the reduction furnace are of a double furnace door structure, wherein an outer furnace door is fixedly connected with the air cylinder, and pull rod springs fixedly connected with the furnace body are arranged on two sides of the furnace door.
5. The push plate type double-tube reducing furnace as claimed in claim 4, wherein: the inner furnace door is made of 2520 heat-resistant stainless steel, the thickness of the furnace door is 20mm, reinforcing ribs are arranged on the surface of the furnace door, and the furnace door is movably connected with the rotating shaft through a U-shaped hinge.
6. The push plate type double-tube reducing furnace according to claim 1, wherein: the boat used in the reduction furnace has a square structure.
7. The push plate type double-tube reducing furnace as claimed in claim 6, wherein: the external dimension of the boat is 620mm multiplied by 75mm, the internal dimension is 600mm multiplied by 50mm, and the material is GH3128 high-temperature corrosion-resistant alloy.
8. The push plate type double-tube reducing furnace as claimed in claim 7, wherein: the boat is placed in the boat carrier. The inner cavity of the bracket is matched with the outer wall of the boat in size, the boat and the bracket are fixed by screws, and the bottom of the bracket is hollow grid-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211735636.1A CN116558276A (en) | 2022-12-31 | 2022-12-31 | Push plate type double-tube reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211735636.1A CN116558276A (en) | 2022-12-31 | 2022-12-31 | Push plate type double-tube reduction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116558276A true CN116558276A (en) | 2023-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211735636.1A Pending CN116558276A (en) | 2022-12-31 | 2022-12-31 | Push plate type double-tube reduction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116558276A (en) |
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2022
- 2022-12-31 CN CN202211735636.1A patent/CN116558276A/en active Pending
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