CN111559132B - Manufacturing process of reinforced composite hard felt heat insulation material for pressure furnace - Google Patents

Manufacturing process of reinforced composite hard felt heat insulation material for pressure furnace Download PDF

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CN111559132B
CN111559132B CN202010448207.0A CN202010448207A CN111559132B CN 111559132 B CN111559132 B CN 111559132B CN 202010448207 A CN202010448207 A CN 202010448207A CN 111559132 B CN111559132 B CN 111559132B
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carbonization
layers
manufacturing process
heat insulation
reinforced composite
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CN111559132A (en
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宋立臣
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Hunan Meiterei New Material Technology Co ltd
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Hunan Meiterei New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0036—Heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B32B2038/168—Removing solvent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Carbon And Carbon Compounds (AREA)
  • Ceramic Products (AREA)

Abstract

A manufacturing process of a reinforced composite hard felt heat insulation material for a pressure furnace comprises the processes of gum dipping, mould pressing and carbonization treatment; before dipping, sealing the upper and lower surface layers of each single substrate, forming solidified upper and lower isolating layers on the upper and lower surface layers of the single substrate, and then dipping, molding and carbonizing in sequence. The sealing treatment comprises the following steps: 1) the substrate is sealed to form an isolating layer; 2) thickening and hardening the isolation layer; 3) and thickening and curing the isolation layer. The method has the advantages that through a special manufacturing process which mainly comprises sealing treatment of a single substrate before gum dipping, the mechanical property of the heat-insulating material can be improved in the subsequent manufacturing process of the heat-insulating material, and the heat-insulating property of the carbon felt in the substrate can be prevented from being damaged, so that the qualified reinforced composite hard felt heat-insulating material for the pressure furnace is obtained.

Description

Manufacturing process of reinforced composite hard felt heat insulation material for pressure furnace
Technical Field
The invention relates to a manufacturing process of a heat-insulating material, in particular to a manufacturing process of a reinforced composite hard felt heat-insulating material for a pressure furnace, and belongs to the technical field of heat-insulating material production.
Background
The pressure furnace used in metallurgical industry needs reinforced composite hard felt heat insulating material. The existing reinforced composite hard felt heat insulation material is prepared by the processes of dipping and coating a single soft carbon felt with a binder, then stacking the single soft carbon felt in a sandwich structure in a multi-layer way, and then carrying out die pressing, shaping, drying, later carbonization and the like. Although the mechanical strength of the reinforced composite hard felt heat insulation material prepared by the process can meet the requirement of a pressure furnace on the heat insulation material, the mechanical strength and the heat insulation performance of the reinforced composite hard felt heat insulation material are difficult to synchronously meet the requirement of the pressure furnace due to the absence and the improper technical means shown in various links in the process flow in the prior art, the original heat insulation performance of carbon felt components in the material cannot be excessively damaged when the mechanical strength is ensured, and the mechanical strength required by the pressure furnace is difficult to achieve while the heat insulation performance of the carbon felt is ensured.
Disclosure of Invention
The technical problems to be solved by the invention are mainly as follows: the mechanical strength and the heat preservation performance of the traditional manufacturing process are difficult to synchronously meet the requirements required by the pressure furnace.
Aiming at the problems, the technical scheme provided by the invention is as follows:
a manufacturing process of a reinforced composite hard felt heat insulation material for a pressure furnace comprises the processes of gum dipping, mould pressing and carbonization treatment; before dipping, sealing the upper and lower surface layers of each single substrate, forming solidified upper and lower isolating layers on the upper and lower surface layers of the single substrate, and then dipping, molding and carbonizing in sequence.
Further, the sealing treatment of the monolithic substrate before the impregnation comprises the following steps:
1) sealing the base: coating cyanoacrylate glue with the thickness of 0.5-1.5 mm on the upper and lower surface layers of the base material and naturally drying to form initial upper and lower isolating layers;
2) thickening and hardening: coating epoxy resin glue with the thickness of 1.5-2.5 mm on the surfaces of the initial upper and lower isolating layers in the step 1) and placing the epoxy resin glue in an oven to be dried to form hardened upper and lower isolating layers;
3) thickening and curing: and (3) coating epoxy resin glue with the thickness of 1.5-2.5 mm and containing a curing agent on the surfaces of the hardened upper and lower isolation layers in the step 2) again, and placing the epoxy resin glue in an oven to be dried to form the cured upper and lower isolation layers.
Further, the drying temperature in the drying oven in the steps 2) and 3) is 100-135 ℃, and the drying time is 8-12 hours.
Further, the dipping is to rapidly dip each single substrate of which the upper and lower isolation layers are cured in the step 3) in a glue solution containing a curing agent to realize the complete sealing of the peripheral edge opening of the single substrate and further cure the upper and lower isolation layers on the upper and lower surface layers of the single substrate.
Further, the single substrate after gum dipping is sequentially coated with an adhesive, stacked layer by layer, molded and dried at normal temperature.
Further, the carbonization is to use a carbonization furnace to carry out carbonization treatment on the heat-insulating material which is subjected to compression molding and air drying at normal temperature for two times as follows:
first carbonization: and extracting glue residues.
And (3) second carbonization: and graphitizing to ensure that unstable substances with the internal melting point lower than 2100 ℃ in the heat insulation material are fully volatilized.
Further, the temperature of the first carbonization is 1500-1700 ℃.
Further, the temperature of the second carbonization is 2100 to 2300 ℃.
The invention has the advantages that: by adopting a special manufacturing process which mainly carries out sealing treatment on a single base material before gum dipping, the mechanical property of the heat-insulating material can be improved in the subsequent manufacturing process of the heat-insulating material, and the heat-insulating property of the carbon felt in the base material can not be damaged, so that the qualified reinforced composite hard felt heat-insulating material for the pressure furnace is obtained.
Drawings
FIG. 1 is a monolithic substrate of the present invention prior to sealing treatment;
FIG. 2 is a monolithic substrate having upper and lower spacer layers after a sealing process;
FIG. 3 is a single substrate having a treated outer surface with a treated outer surface;
FIG. 4 is a schematic view of the process of the present invention for forming the insulation material from a single substrate to a reinforced composite hard felt insulation material.
In the figure:
1. sealing the pre-treatment monolith substrate;
2. a monolithic substrate having upper and lower spacer layers;
3. a monolithic substrate having a treated layer;
4. a heat insulating material to be molded;
5. a shaping heat-insulating material to be carbonized;
6. a reinforced composite hard felt heat insulation material;
100. a carbon felt;
101. a surface layer;
102. a side opening;
200. an isolation layer;
300. and a gum dipping layer.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
as shown in fig. 1-3, a process for manufacturing reinforced composite hard felt heat insulation material for pressure furnaces comprises gum dipping, mould pressing and carbonization treatment. Before dipping, the upper surface layer 101 and the lower surface layer 101 of each single substrate are respectively sealed, solidified upper isolation layers 200 and solidified lower isolation layers 200 are formed on the upper surface layer 101 and the lower surface layer 101 of each single substrate, and then dipping, mould pressing and carbonization treatment are sequentially carried out. The upper and lower insulating layers 200 themselves must have sufficient hardness to meet the mechanical strength requirements of the insulating material in the pressure furnace, and also must be cured so that they will not easily deform during subsequent processing. If the requirement of the pressure furnace on the mechanical strength of the heat-insulating material is only considered to be met, the upper and lower isolation layers 200 are not necessarily finished before the impregnation or are not necessarily finished at all, and are directly realized by the impregnation according to the prior art. The invention adopts the technical means before the gum dipping, and aims to utilize the upper and lower isolating layers 200 formed by the upper and lower surface layers 101 of the single substrate to completely block the gum solution and the adhesive from being dipped into the heat-insulating material of the carbon felt 100 in the substrate when the adhesive is subsequently dipped and coated, so that the heat-insulating property of the heat-insulating material of the carbon felt 100 in the substrate is not damaged. Therefore, the sufficient heat insulation performance of the heat insulation material can be still maintained despite the fact that the mechanical strength of the material is enhanced through a plurality of subsequent processes.
In the manufacturing process of the reinforced composite hard felt heat insulation material for the pressure furnace, the sealing treatment of the single substrate before gum dipping comprises the following steps:
1) sealing the base: coating glue with the thickness of 0.5 mm-1.5 mm on the upper surface layer 101 and the lower surface layer 101 of the base material, and naturally drying to form an initial upper isolation layer 200 and an initial lower isolation layer 200;
2) thickening and hardening: coating glue with the thickness of 1.5-2.5 mm on the surfaces of the initial upper and lower isolating layers 200 in the step 1) and placing the glue in an oven to be dried to form hardened upper and lower isolating layers 200;
3) thickening and curing: and (3) coating glue with the thickness of 1.5-2.5 mm and containing a curing agent on the surfaces of the hardened upper and lower isolation layers 200 in the step 2) again, and placing the glue in an oven to be dried to form the solidified upper and lower isolation layers 200.
The formation of the upper and lower isolation layers 200 is performed through three processes, one of which is that the upper and lower isolation layers 200 are not too thick at one time and too thick, and more glue is also dipped into the substrate, so that more carbon felts 100 lose the heat insulation performance, and from this point, if the upper and lower isolation layers 200 formed by the first time of gluing can achieve an ideal sealing effect on the inside of the substrate, the first time of gluing is the thinner the better. Secondly, the coating is thin at one time, which is beneficial to quick air drying (drying). Thirdly, gluing for many times to increase the thickness of the upper and lower isolating layers 200 so as to meet the requirement of mechanical strength.
The main components of the glue solution are generally epoxy resin, only the glue solution in the steps 1) and 2) is not added with a curing agent, and only the glue solution in the step 3) is added, so that the glue solution coated in the previous two working procedures and the glue solution coated at this time need to be cured together.
The drying temperature in the drying oven in the step 2) and the step 3) is 100-135 ℃, and the drying time is 30-50 hours. In practical applications, a temperature of 110 ℃ and a drying time of 40 hours are preferably adopted.
The dipping is to dip the cured upper and lower isolation layers 200 of the monolithic substrate in the glue solution containing the curing agent in step 3) of claim 2, and form a dipping layer 300 on the surfaces of the upper and lower isolation layers 200 and the peripheral edge openings 102 of the monolithic substrate, so as to realize the overall sealing of the peripheral edge openings 102 of the monolithic substrate and further cure the upper and lower surface layers 101 of the monolithic substrate. In the sealing treatment of the previous stage, the peripheral edge 102 of the single substrate is not glued, so that the working efficiency is improved, and the subsequent pressing process is unnecessary or even harmful, so that the multi-layer stacked substrate is compressed downwards by a certain thickness to meet the requirement of mechanical strength, and if an excessively thick and hard glue edge is formed on the edge 102, the pressing is obviously not favorable. However, the peripheral edge 102 of the monolith substrate also needs to be closed because there is a subsequent step of applying the binder to prevent the binder from soaking into the mat 100 and degrading its thermal insulation. In order to prevent excessive glue solution from being soaked into the carbon felt 100 along the peripheral edge port 102 of the single substrate in the dipping process, the dipping process needs to be performed quickly, and the glue solution is stopped when being soaked into the carbon felt 100 by about 1mm from the peripheral edge port of the single substrate.
And sequentially coating the single substrate subjected to gum dipping with an adhesive, stacking layer by layer, carrying out compression molding, and then placing at normal temperature for air drying. The problem of prior art adoption fast drying leads to loose structure has been solved like this.
The carbonization is that a carbonization furnace is used for carbonizing the heat-insulating material which is subjected to compression molding and air drying at normal temperature for two times:
first carbonization: and extracting glue residues.
And (3) second carbonization: and graphitizing to ensure that unstable substances with the internal melting point lower than 2100 ℃ in the heat insulation material are fully volatilized.
The above two carbonization steps are actually carried out at different temperatures to gradually obtain an ideal carbonization effect. In the above two carbonizing processes, the second carbonizing temperature is lower than the first carbonizing temperature.
The temperature of the first carbonization is 1500-1700 ℃, and 1600 ℃ is mostly adopted in practical application.
The temperature of the second carbonization is 2100-2300 ℃, and 2200 ℃ is mostly adopted in practical application.
FIG. 4 shows the formation process of the thermal insulation material from the single substrate to the reinforced composite hard felt thermal insulation material in the process flow of the invention:
monolithic substrate 1 before sealing treatment;
the monolithic substrate 1 is sealed to form a monolithic substrate 2 with an upper isolation layer 200 and a lower isolation layer 200;
the monolithic substrate 2 with the isolation layer 200 is treated by dipping to form a monolithic substrate 3 with a dipping layer 300 on the whole outer surface;
after a single substrate 3 is coated with an adhesive, a plurality of substrates are stacked to form a heat insulation material 4 to be molded;
forming a shaping heat-insulating material 5 to be carbonized after the mould pressing heat-insulating material 4 is subjected to mould pressing;
the shaped heat-insulating material 5 is carbonized to form the reinforced composite hard felt heat-insulating material 6.
The heat preservation material 4 to be molded is molded to form a shaped heat preservation material 5 to be carbonized, the thickness of the shaped heat preservation material is obviously changed after the shaped heat preservation material is thinned, the mechanical strength is obviously enhanced, the carbon felt 100 is still not soaked in glue solution, and the heat preservation performance of the shaped heat preservation material is not damaged by glue dipping and adhesive coating.
Herein, the following:
"upper and lower surface layers 101" are brief descriptions of the upper surface layer 101 and the lower surface layer 101;
the "upper and lower separation layers 200" are brief descriptions of the upper separation layer 200 and the lower separation layer 200.
The above embodiments are only for the purpose of more clearly describing the invention and should not be taken as limiting the scope of protection covered by the invention, and any equivalent modifications should be taken as falling within the scope of protection covered by the invention.

Claims (5)

1. A manufacturing process of a reinforced composite hard felt heat insulation material for a pressure furnace comprises the processing flows of gum dipping, mould pressing and carbonization, and is characterized in that: before dipping, sealing the upper and lower surface layers of each single substrate respectively, forming solidified upper and lower isolating layers on the upper and lower surface layers of the single substrate, and then sequentially dipping, molding and carbonizing;
the sealing treatment of the monolithic substrate before gum dipping comprises the following steps:
1) sealing the base: coating glue with the thickness of 0.5 mm-1.5 mm on the upper surface layer and the lower surface layer of the base material, and naturally drying to form an initial upper isolation layer and an initial lower isolation layer;
2) thickening and hardening: coating glue with the thickness of 1.5-2.5 mm on the surfaces of the initial upper and lower isolating layers in the step 1) and placing the glue in an oven to be dried to form hardened upper and lower isolating layers;
3) thickening and curing: coating glue with the thickness of 1.5-2.5 mm and containing a curing agent on the surfaces of the hardened upper and lower isolation layers in the step 2) again, and placing the glue in an oven to be dried to form the cured upper and lower isolation layers;
the gum dipping is to dip the cured upper and lower isolation layers formed in the step 3) into a gum solution containing a curing agent rapidly to realize the comprehensive sealing of the peripheral edge of the single substrate and further cure the upper and lower isolation layers on the upper and lower surface layers of the single substrate;
and sequentially coating the single substrate subjected to gum dipping with an adhesive, stacking layer by layer, carrying out compression molding, and then placing at normal temperature for air drying.
2. The manufacturing process of the reinforced composite hard felt heat insulation material for the pressure furnace according to claim 1, which is characterized in that: the drying temperature in the drying oven in the step 2) and the step 3) is 100-135 ℃, and the drying time is 8-12 hours.
3. The manufacturing process of the reinforced composite hard felt heat insulation material for the pressure furnace according to claim 1, which is characterized in that: the carbonization is to use a carbonization furnace to carry out the following two carbonization treatments on the heat-insulating material which is subjected to compression molding and air drying at normal temperature:
first carbonization: extracting glue residues;
and (3) second carbonization: and graphitizing to ensure that unstable substances with the internal melting point lower than 2100 ℃ in the heat insulation material are fully volatilized.
4. The manufacturing process of the reinforced composite hard felt heat insulation material for the pressure furnace according to claim 3, characterized by comprising the following steps: the temperature of the first carbonization is 1500-1700 ℃.
5. The manufacturing process of the reinforced composite hard felt heat insulation material for the pressure furnace according to claim 4, characterized in that: the temperature of the second carbonization is 2100 to 2300 ℃.
CN202010448207.0A 2020-05-25 2020-05-25 Manufacturing process of reinforced composite hard felt heat insulation material for pressure furnace Active CN111559132B (en)

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