CN106288816A - Mullite is as the application of heat treatment carrier - Google Patents
Mullite is as the application of heat treatment carrier Download PDFInfo
- Publication number
- CN106288816A CN106288816A CN201610617630.2A CN201610617630A CN106288816A CN 106288816 A CN106288816 A CN 106288816A CN 201610617630 A CN201610617630 A CN 201610617630A CN 106288816 A CN106288816 A CN 106288816A
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- China
- Prior art keywords
- mullite
- thin plate
- heat treatment
- application
- carrier
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Classifications
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- 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
- F27D5/00—Supports, screens, or the like for the charge within the furnace
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
The invention discloses the mullite application as heat treatment carrier, specifically the delivery vehicles as the metallic article without protection of reducing atmosphere is applied in tube furnace.The present invention substitutes graphite material by mullite material and is applied in tube furnace as delivery vehicles; not only solving high temperature delivery vehicles material---the furnace power that the heat absorption of graphite is fast, high heat capacity character causes requires height, the problem that cooling device configuration requirement is high; and save energy consumption; more eliminate the restitutive protection's atmosphere used for preventing oxidization burning loss under graphite carrier high temperature, adapt to the application scenario of more conventional atmosphere simultaneously.
Description
Technical field
The present invention relates to the mullite application as heat treatment carrier, concrete as the metal system without protection of reducing atmosphere
The delivery vehicles of product is applied in tube furnace, for reduce energy consumption, stablize furnace temperature, adaptation non-reducing atmosphere heat treatment requirements and special
Design.
Background technology
The carrier of metallic high temperature heat treatment is usually graphite material.For avoiding graphite carrier at high temperature oxidization burning loss, heat
Process need to be in reducing atmosphere condition (such as H2Carry out under), and reducing atmosphere has the danger of blast, burning.
Graphite heat absorption is fast, heat of attracting deposit is big, needs the tube furnace that design power is bigger that graphite carrier just can be made to enter in stove
After furnace temperature will not be caused to decline to a great extent, it is ensured that the metallic article of carrying can obtain enough heats and reach technological requirement.
After the graphite carrier that high-temperature region exports continuously enters cooling zone, the heat that carrier is attracted deposit is released quickly against cooling zone,
The temperature forcing cooling or prolongation cooling zone guarantee metallic article is needed to meet technological requirement.
In whole heat treatment process, substantial amounts of heat is consumed by graphite carrier.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that mullite as heat at
The application of reason carrier, the present invention substitutes graphite by mullite and is applied to metallic article continuous high temperature as tube furnace delivery vehicles
In the tube furnace of heat treatment, the energy consumption of metallic article high-temperature heat treatment production link is greatly lowered, cancels making of reducing atmosphere
With, eliminate the danger quick-fried product source of production scene, improve temperature-controlled precision, stable and Improving The Quality of Products, significantly save consumption, place throwing
Enter, safeguard procedures put into and the cost of management.
The technical solution adopted for the present invention to solve the technical problems is: provide mullite answering as heat treatment carrier
With, specifically the delivery vehicles as the metallic article without protection of reducing atmosphere is applied in tube furnace.
Mullite of the present invention is as the application of heat treatment carrier, and wherein, described mullite should be used as without reduction
The delivery vehicles of the metallic article of atmosphere protection is applied in tube furnace, carries out the most by the following method:
Step (1): obtain the mullite thin plate of bulk；
Step (2): the mullite thin plate of bulk is neatly cut into the mullite thin plate of fritter；
Step (3): loading surface and stress surface reconditioning during pushing mullite thin plate are smooth again；
Step (4): pending metallic article is placed on the loading surface of mullite thin plate；
Step (5): be put on combustion flue by the mullite thin plate that step (4) has loaded, to touch before and after stress surface, from backward
Front applying thrust will carry out heat treatment continuously in metallic article furnace conveyor, or is driven single step (4) to load by steel mesh belt
Mullite thin plate enter in tube furnace, the metallic article then carried mullite thin plate carries out heat treatment.
Mullite of the present invention is as the application of heat treatment carrier, wherein, and mullite thin plate described in step (1)
Bulk density is 1.5-1.8g/cm3, the thickness of slab of described mullite thin plate is 0.8-1.0cm.
Mullite of the present invention is as the application of heat treatment carrier, wherein, uses circular Dali stone saw in step (2)
Sheet adds water cooling, and bulk mullite thin plate is cut into fritter mullite thin plate, and the bottom shape of the mullite thin plate of fritter is
Rectangle, the longest 15-18cm, wide 8-10cm.
Mullite of the present invention is as the application of heat treatment carrier, wherein, and the mullite thin plate kept flat in step (3)
Upper surface is loading surface, reconditioning loading surface, it is desirable to loading surface is smooth and parallel with bottom surface, prevents the material sliding of carrying.
Mullite of the present invention is as the application of heat treatment carrier, wherein, and being subject to of the mullite thin plate in step (3)
Power face uses plane grinding stone reconditioning to carry out reconditioning processing, it is desirable to stress surface is straight and perpendicular to loading surface, and front and back stress surface is parallel.
Implement mullite of the present invention as the application of heat treatment carrier, have the advantages that
(1) present invention substitutes graphite by mullite and is applied to tube furnace delivery vehicles, can effectively reduce metallic article
The energy consumption of high-temperature heat treatment production link, carrier itself, without the protection of reducing atmosphere, can eliminate the danger quick-fried product source of production scene.
Improve temperature-controlled precision, stable and Improving The Quality of Products, significantly save the costs such as the energy, atmosphere, safeguard procedures input and management.
(2) mullite thin plate low cost, service life is long, saves consumable goods cost.
(3) the mullite plate ruptured aborning just can be used for other form high temperature furnaces by simple cutting finishing and apply
In.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of mullite thin plate prepared by the present invention.
Fig. 2 is the structural representation of the graphite cake that prior art uses.
Detailed description of the invention
Below, in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further:
Mullite is as the application of heat treatment carrier, and specifically the conveying as the metallic article without protection of reducing atmosphere carries
Body is applied to carry out metallic article in the tube furnace of high-temperature heat treatment.
Wherein, described mullite is applied to metallic article as the delivery vehicles of the metallic article without protection of reducing atmosphere
In the tube furnace of continuous high temperature heat treatment.Carry out by the following method:
Step (1): acquisition density is 1.5-1.8g/cm3, thickness is the bulk mullite thin plate of 0.8-1.0cm；
Step (2): the mullite thin plate of bulk is added water cooling, then by the mullite of bulk with circular marble saw blade
Thin plate neatly cuts into the mullite thin plate of fritter, a size of grows 16 × wide by 9 × thick 0.8cm3；And repair loading surface and stick up to plate face
Curvature is not more than 0.1mm, is parallel to bottom surface, prevents the product sliding of conveying；
Step (3): (stress surface refers to front and back touch to the stress surface of the mullite thin plate after cutting to use plane grinding stone again
Touch and push in boiler flow field, the face contacted with each other) carry out reconditioning processing, make before and after's stress surface straight and be parallel to each other, with load
Object plane is vertical, it is ensured that relying on back plate to push away in the continuous conveying process of header board, does not occur carrier arch to turn over, the situations such as overlap of climbing,
As shown in Figure 1；
Step (4): pending metallic article is placed on the loading surface of mullite thin plate；
Step (5): the mullite thin plate (4) loaded is put on combustion flue, front and back touches, applies thrust even from back to front
Continue and metallic article furnace conveyor will carry out heat treatment.
Additionally can be by right in the resistant to elevated temperatures steel mesh belt drive mullite thin plate entrance tube furnace that individually (4) have loaded
The metallic article of carrying carries out heat treatment.
The present invention solves high temperature delivery vehicles material---the high energy consumption that the high heat conductance of graphite, high specific heat character are brought
The problem big with cooling difficulty, the low problem causing needing to carry out reducing atmosphere protection of resolved vector self heat stability, for
Metallic article without protection of reducing atmosphere provides the high temperature of application scenario (such as air, oxygen etc.) adapting to common atmosphere lazy
Property carrier.
In prior art, use graphite material as high-temperature heat treatment delivery vehicles, carrier as shown in Figure 2.Graphite carrier
Temperature-rise period heat absorption fast (129W/ (m K)), heat of attracting deposit big (specific heat from 25 DEG C of about 710J/ (kg K) to when 750 DEG C about
1860J/ (kg K), calculates and learns in 25-750 DEG C of temperature-rise period, and every Kg graphite absorbs heat and is up to 1MJ), graphite carrier
Elevated temperature strength is poor, easy scaling loss, so it is big (generally at more than 1.5cm) to prepare sheet metal thickness, and density is 1.8-2.1g/cm3。
Mullite material heat absorption is relatively slow (thermal conductivity about 4.2W/ (m.K)), and heat of attracting deposit is few, and (specific heat is about 2.5-from 25 DEG C time
3.4J/ (kg K) to when 750 DEG C about 800J/Kg DEG C, calculates and learns in 25-750 DEG C of temperature-rise period, every Kg mullite material
The heat absorbed is only less than 0.3MJ), the about 1/4-1/3 of graphite material；Elevated temperature strength is big, less than 1200 DEG C not softening transforms,
Do not corroded by oxidizing atmosphere, thin plate (the thinnest to 0.2cm) can be made；
In the present invention, using mullite material and reduce carrier thickness, the heat successfully attracted deposit by each carrier reduces
To the 1/6 or lower of graphite carrier, absorbing the heat of 1MJ, when graphite carrier only needs 2 pieces, mullite carrier is accomplished by 12-14
Block.Being made thinner mullite thin plate, heat-conducting effect improves, and can meet the needs of heat treatment.
Without using reducing atmosphere while use mullite carrier, the thermal loss that gas flowing causes can be avoided；By
Step heat absorption and lower thermal loss, stabilize furnace temperature.
After graphite carrier leaves entrance cooling zone, the thermal treatment zone, the heat attracted deposit quickly discharges to cooling zone, sustained release
Heat make cooling zone intake section be heated as red heat state, constantly shorten the coverage of cooling zone, do not forcing
In the case of cooling provision, product is difficult to fast cooling after leaving the thermal treatment zone, produces a large amount of scaling loss waste product.
After mullite carrier leaves entrance cooling zone, the thermal treatment zone, the heat attracted deposit is gradually released to cooling zone, cooling zone
The heat that entrance is received can be drained in time by suitable cooling provision, will not be detained too much heat and become red heat shape
State.Under the conventional type of cooling, mullite carrier can be quickly cooled.
For the high-temperature heat treatment process of metallic article, mullite carrier shows carrier heat absorption less, and heat conduction is moderately good,
The effect that thermo-chemical stability is good, it is not necessary to the protection of reducing atmosphere, is more suitable for the processing environment of oxidizing atmosphere, for without reduction
Atmosphere protection or avoid use reducing atmosphere heat treatment occasion provide suitable carrier.
Simultaneously because the modern of refractory material processes technical maturity and simplification, mullite carrier is as the input of consume product
Cost is greatly lowered (substantially dropping to the 10% of graphite material carrier cost or following), also extends service life (the most extremely
Few more than 3 times).
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various
Corresponding change and deformation, and all these change and deformation all should belong to the protection domain of the claims in the present invention
Within.
Claims (6)
1. mullite is as the application of heat treatment carrier, it is characterised in that concrete as the metal system without protection of reducing atmosphere
The delivery vehicles of product is applied in tube furnace.
Mullite the most according to claim 1 is as the application of heat treatment carrier, it is characterised in that described mullite should be made
For being applied in tube furnace without the delivery vehicles of the metallic article of protection of reducing atmosphere, carry out the most by the following method:
Step (1): obtain the mullite thin plate of bulk；
Step (2): the mullite thin plate of bulk is neatly cut into the mullite thin plate of fritter；
Step (3): loading surface and stress surface reconditioning during pushing mullite thin plate are smooth again；
Step (4): pending metallic article is placed on the loading surface of mullite thin plate；
Step (5): be put on combustion flue by the mullite thin plate that step (4) has loaded, to touch before and after stress surface, executes from back to front
Add thrust and metallic article furnace conveyor will carry out heat treatment continuously, or driven single step (4) to load not by steel mesh belt
Carrying out stone thin plate to enter in tube furnace, the metallic article then carried mullite thin plate carries out heat treatment.
Mullite the most according to claim 2 is as the application of heat treatment carrier, it is characterised in that described in step (1)
The bulk density of mullite thin plate is 1.5-1.8g/cm3, the thickness of slab of described mullite thin plate is 0.8-1.0cm.
Mullite the most according to claim 2 is as the application of heat treatment carrier, it is characterised in that use in step (2)
Circular marble saw blade adds water cooling, bulk mullite thin plate is cut into fritter mullite thin plate, the mullite thin plate of fritter
Bottom shape be rectangle, the longest 15-18cm, wide 8-10cm.
Mullite the most according to claim 2 is as the application of heat treatment carrier, it is characterised in that step keeps flat in (3)
Mullite thin plate upper surface be loading surface, reconditioning loading surface, it is desirable to loading surface is smooth and parallel with bottom surface, prevent carrying thing
Material sliding.
Mullite the most according to claim 2 is as the application of heat treatment carrier, it is characterised in that in step (3) not
The stress surface carrying out stone thin plate uses plane grinding stone reconditioning to carry out reconditioning processing, it is desirable to stress surface is straight and perpendicular to loading surface, front
Rear stress surface is parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610617630.2A CN106288816A (en) | 2016-07-29 | 2016-07-29 | Mullite is as the application of heat treatment carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610617630.2A CN106288816A (en) | 2016-07-29 | 2016-07-29 | Mullite is as the application of heat treatment carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106288816A true CN106288816A (en) | 2017-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610617630.2A Pending CN106288816A (en) | 2016-07-29 | 2016-07-29 | Mullite is as the application of heat treatment carrier |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543101A1 (en) * | 1991-11-21 | 1993-05-26 | Gautschi Electro-Fours SA | Transporting device for a pusher type or continuous oven |
| CN202361791U (en) * | 2011-12-16 | 2012-08-01 | 浙江今明光电材料有限公司 | Push plate for tunnel kiln |
| CN203657447U (en) * | 2013-11-27 | 2014-06-18 | 陕西丰源钒业科技发展有限公司 | Reduction section device for producing vanadium-nitrogen alloy through double pushed-slab kilns according to one-step method |
| CN104591753A (en) * | 2014-12-24 | 2015-05-06 | 江苏三恒高技术窑具有限公司 | High-performance modified mullite high-temperature bedplate as well as manufacturing method |
-
2016
- 2016-07-29 CN CN201610617630.2A patent/CN106288816A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543101A1 (en) * | 1991-11-21 | 1993-05-26 | Gautschi Electro-Fours SA | Transporting device for a pusher type or continuous oven |
| CN202361791U (en) * | 2011-12-16 | 2012-08-01 | 浙江今明光电材料有限公司 | Push plate for tunnel kiln |
| CN203657447U (en) * | 2013-11-27 | 2014-06-18 | 陕西丰源钒业科技发展有限公司 | Reduction section device for producing vanadium-nitrogen alloy through double pushed-slab kilns according to one-step method |
| CN104591753A (en) * | 2014-12-24 | 2015-05-06 | 江苏三恒高技术窑具有限公司 | High-performance modified mullite high-temperature bedplate as well as manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| 江西省陶瓷工业公司: "《景德外埠陶瓷工业年鉴 1986》", 31 December 1986, 《景德镇陶瓷》杂质编辑部 * |
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Application publication date: 20170104 |