CN111662078A - High-temperature flue gate plate sintering method - Google Patents

High-temperature flue gate plate sintering method Download PDF

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Publication number
CN111662078A
CN111662078A CN202010486301.5A CN202010486301A CN111662078A CN 111662078 A CN111662078 A CN 111662078A CN 202010486301 A CN202010486301 A CN 202010486301A CN 111662078 A CN111662078 A CN 111662078A
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temperature
sintering
temperature flue
gate plate
curve
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CN202010486301.5A
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CN111662078B (en
Inventor
肖述兵
何成
金岭
梁晓光
李建华
李厚
李建军
曾岩东
李效峰
赵录禧
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Qinghai Huanghe Hydropower Development Co Ltd
Huanghe Hydropower Development Co Ltd
Huanghe Xinye Co Ltd
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Qinghai Huanghe Hydropower Development Co Ltd
Huanghe Hydropower Development Co Ltd
Huanghe Xinye Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6565—Cooling rate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention aims to disclose a high-temperature flue gate sintering method, which comprises the following steps of sintering a cast gate in a roasting furnace at the following temperature nodes: 30-300 ℃, 350 ℃, 480 ℃, 700 ℃, 1000 ℃, 600 ℃ and 600-normal temperature; compared with the prior art, the method has the advantages that the cast gate plate is sintered by using the roasting furnace and the temperature rise curve, the method is convenient and easy to implement and not easy to damage, the production efficiency is improved, the cost is saved, and the purpose of the method is achieved.

Description

High-temperature flue gate plate sintering method
Technical Field
The invention relates to a high-temperature sintering method, in particular to a high-temperature flue gate plate sintering method.
Background
The casting body is sintered before use, and the sintering is to make different substances generate chemical reaction to generate hard AlSiO3The strength of the pouring material is improved, and the situation that the gate plate is peeled and burst in the early stage of use is avoided, so that the normal use of the gate body is influenced. A large amount of crystal water is associated with the chemical reaction and is slowly discharged in the sintering process. The discharge temperature of free water is 80-120 ℃, free water still is discharged at 350-500 ℃, and the water content of the casting material crystal water at 600 ℃ is about 10 percent, so the temperature rise speed should be controlled to be above 600 ℃ before 600 ℃, and the temperature can be quickly raised as long as the temperature difference between the inside and the outside of the casting material is not large. The roasting furnace is an ideal sintering place, and the flashboard is sintered by the roasting furnace.
Therefore, a need exists for a method of sintering a high temperature flue damper that solves the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a high-temperature flue gate plate sintering method, aiming at the defects of the prior art, the cast gate plate is sintered by using a roasting furnace and a temperature rise curve, so that the method is convenient and easy to implement, is not easy to damage, improves the production efficiency and saves the cost.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a high-temperature flue gate plate sintering method is characterized in that a cast gate plate is sintered in a roasting furnace at the following temperature nodes: 30-300 ℃, 350 ℃, 480 ℃, 700 ℃, 1000 ℃, 600 ℃ and 600-normal temperature.
In one embodiment of the invention, the cast shutter is kept at 300 ℃ for 60h above the furnace chamber of the calciner, and most of the free water is removed.
In one embodiment of the invention, the gate plate is installed in the furnace chamber of the roasting furnace, the temperature rise curve is 300-.
In one embodiment of the invention, when the temperature is raised to 480 ℃, the strength of the gate plate is insufficient and the gate plate is easy to break, and a large amount of water generated by a violent chemical reaction generated in the previous roasting process needs to be removed, the temperature is raised according to the curve of 480-.
In one embodiment of the invention, after the temperature reaches 700 ℃, the temperature continues to rise according to the curve of 700-1000 ℃ and the time is controlled to be 35h, so as to further increase the strength.
In one embodiment of the invention, after the temperature reaches 1000 ℃, the temperature is preserved for 6h, then the temperature is naturally reduced according to the curve of 1000-600 ℃, the temperature reduction time is controlled to be 50h, and finally the temperature is cooled to the normal temperature in the cooling chamber for 20 h.
Compared with the prior art, the sintering method of the high-temperature flue gate plate provided by the invention has the advantages that the cast gate plate is sintered by using the roasting furnace and the temperature rise curve, the operation is convenient and easy, the damage is not easy, the production efficiency is improved, the cost is saved, and the purpose of the invention is realized.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
FIG. 1 is a schematic structural diagram of a high temperature flue damper charging furnace of the present invention;
FIG. 2 is a schematic diagram of the temperature rise and decrease curves of the high-temperature flue shutter sintering method of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Examples
As shown in fig. 1 and 2, in the high-temperature flue shutter sintering method of the present invention, the cast shutter is sintered in a firing furnace at the following temperature nodes: 30-300 ℃, 350 ℃, 480 ℃, 700 ℃, 1000 ℃, 600 ℃ and 600-normal temperature.
In this embodiment, temporary hooks are welded to the bottom plate before charging.
In the embodiment, 2 steel plates with the thickness of more than or equal to 10mm are laid on the cooling furnace chamber (with the temperature of 500-.
In this embodiment, a filler with a thickness of 200mm is spread in a chamber to be loaded and scraped to be flat, the gate plates are hoisted into the baking furnace chamber (the furnace chamber 5436X 5293X 780) by a crane, vertically placed in the center of the furnace chamber, the two sides are positioned by square timbers, and then the other gate plate is loaded in parallel according to the same method, and in order to prevent the floor from being pulled and deformed, a special sling carrying pole needs to be manufactured. After the flashboard is fixed, the two sides are filled with filling materials, and the height of the flashboard does not exceed the height of the bottom plate, so that the flashboard is prevented from being oxidized and deformed. As the flashboard has no volatile matter and the temperature rise rate of the flashboard needs to be reduced, the quality of the carbon blocks in the 2 chambers is inevitably influenced, and the waste blocks in the 2 chambers are roasted.
In the embodiment, the temperature rise time of the shutter plate in the furnace chamber at 350 ℃ and 350 ℃ is controlled to be about 18h, the temperature rise time of the shutter plate at 480 ℃ and 350 ℃ is controlled to be about 15h, the temperature rise time of the shutter plate at 700 ℃ and 700 ℃ is controlled to be about 62h, and the temperature rise time of the shutter plate at 700 ℃ and 1000 ℃ is controlled to be about 35 h.
In this embodiment, the temperature is kept for 6h after the temperature is raised to 1000 ℃, the flashboard is lifted out, the furnace chamber to be charged is filled with the flashboard, the furnace chamber is naturally cooled, when the temperature is reduced to 600 ℃, the furnace chamber is lifted to a furnace chamber platform and cooled to room temperature (about 25 ℃) for standby, and the temperature rise and reduction curve of the flashboard is shown in fig. 2.
In this embodiment, a thermocouple is placed in the position of the filling material close to the flashboard to monitor the baking temperature, and when the temperature rises too fast, the burner (4P or 5P or 6P) of the furnace chamber is stopped and the filling material is pulled away to increase the heat dissipation.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims (6)

1. A high-temperature flue gate plate sintering method is characterized in that a cast gate plate is sintered in a roasting furnace at the following temperature nodes: 30-300 ℃, 350 ℃, 480 ℃, 700 ℃, 1000 ℃, 600 ℃ and 600-normal temperature.
2. The method of claim 1, wherein the cast shutter is held at 300 ℃ for 60 hours above the furnace chamber of the roaster to remove most of the free water.
3. The method for sintering the high-temperature flue damper as claimed in claim 1, wherein the damper is installed in a furnace chamber of a roasting furnace, the temperature rise curve is 300-.
4. The sintering method for the high-temperature flue damper as claimed in claim 1, wherein when the temperature is raised to 480 ℃, the damper is not strong enough and is easy to break, and a large amount of water generated by violent chemical reaction in the previous roasting process needs to be removed, the temperature is raised according to a curve of 480-.
5. The method for sintering the shutter of the high-temperature flue as claimed in claim 1, wherein the temperature is raised according to the curve of 700-1000 ℃ after reaching 700 ℃, and the time is controlled to 35h, so as to further increase the strength.
6. The method for sintering the shutter of the high-temperature flue as claimed in claim 1, wherein the temperature is kept for 6h after reaching 1000 ℃, then the temperature is naturally reduced according to the curve of 1000-600 ℃, the temperature reduction time is controlled to be 50h, and finally the high-temperature flue is cooled to the normal temperature in the cooling chamber for 20 h.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113686161A (en) * 2021-08-27 2021-11-23 江苏双发机械有限公司 Method for sintering and curing inner barrel hanging piece of castable preheater and inner barrel hanging piece

Citations (9)

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JPH05221736A (en) * 1992-02-14 1993-08-31 Nippon Steel Corp Castable refractory for steel making
EP1674437A1 (en) * 2004-12-21 2006-06-28 BAM Bundesanstalt für Materialforschung und -prüfung Process of manufacture of shaped ceramic bodies on the basis of sinterable powders
CN101475389A (en) * 2009-01-16 2009-07-08 张命荣 Castable refractory for high-precision aluminum alloy melt external refining and using method
CN101475387A (en) * 2009-01-16 2009-07-08 张命荣 Ultramicro powder combined ultra-low cement refractory castable and using method thereof
CN101880896A (en) * 2010-06-10 2010-11-10 索通发展有限公司 Method for drying carbon anode roasting furnace
CN103086726A (en) * 2013-01-11 2013-05-08 成都蜀冶新材料有限责任公司 Silicon oxide refractory castable and using method thereof
CN104177101A (en) * 2014-08-20 2014-12-03 江苏腾天工业炉有限公司 Formula and manufacturing technique of heavy-weight castable for industrial furnace inner wall
CN110698183A (en) * 2019-11-08 2020-01-17 武汉科技大学 Lightweight castable for ladle gas plug and preparation method thereof
CN111039661A (en) * 2019-12-09 2020-04-21 云南固废投资有限公司 High-temperature-resistant corrosion-resistant wear-resistant castable for waste incinerator and application thereof

Patent Citations (9)

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JPH05221736A (en) * 1992-02-14 1993-08-31 Nippon Steel Corp Castable refractory for steel making
EP1674437A1 (en) * 2004-12-21 2006-06-28 BAM Bundesanstalt für Materialforschung und -prüfung Process of manufacture of shaped ceramic bodies on the basis of sinterable powders
CN101475389A (en) * 2009-01-16 2009-07-08 张命荣 Castable refractory for high-precision aluminum alloy melt external refining and using method
CN101475387A (en) * 2009-01-16 2009-07-08 张命荣 Ultramicro powder combined ultra-low cement refractory castable and using method thereof
CN101880896A (en) * 2010-06-10 2010-11-10 索通发展有限公司 Method for drying carbon anode roasting furnace
CN103086726A (en) * 2013-01-11 2013-05-08 成都蜀冶新材料有限责任公司 Silicon oxide refractory castable and using method thereof
CN104177101A (en) * 2014-08-20 2014-12-03 江苏腾天工业炉有限公司 Formula and manufacturing technique of heavy-weight castable for industrial furnace inner wall
CN110698183A (en) * 2019-11-08 2020-01-17 武汉科技大学 Lightweight castable for ladle gas plug and preparation method thereof
CN111039661A (en) * 2019-12-09 2020-04-21 云南固废投资有限公司 High-temperature-resistant corrosion-resistant wear-resistant castable for waste incinerator and application thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113686161A (en) * 2021-08-27 2021-11-23 江苏双发机械有限公司 Method for sintering and curing inner barrel hanging piece of castable preheater and inner barrel hanging piece

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