CN116409986A - Fire-resistant fire-blocking brick for upper part of fire path wall of carbon roasting furnace and preparation method thereof - Google Patents
Fire-resistant fire-blocking brick for upper part of fire path wall of carbon roasting furnace and preparation method thereof Download PDFInfo
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- CN116409986A CN116409986A CN202310394418.4A CN202310394418A CN116409986A CN 116409986 A CN116409986 A CN 116409986A CN 202310394418 A CN202310394418 A CN 202310394418A CN 116409986 A CN116409986 A CN 116409986A
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- 239000011449 brick Substances 0.000 title claims abstract description 101
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 40
- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 138
- 239000000843 powder Substances 0.000 claims abstract description 100
- 239000002994 raw material Substances 0.000 claims abstract description 83
- 239000008187 granular material Substances 0.000 claims abstract description 67
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 65
- 239000011812 mixed powder Substances 0.000 claims abstract description 54
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000010443 kyanite Substances 0.000 claims abstract description 51
- 229910052850 kyanite Inorganic materials 0.000 claims abstract description 51
- 239000011325 microbead Substances 0.000 claims abstract description 46
- 239000004927 clay Substances 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 229920001353 Dextrin Polymers 0.000 claims abstract description 5
- 239000004375 Dextrin Substances 0.000 claims abstract description 5
- 235000019425 dextrin Nutrition 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000010304 firing Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 19
- 239000007767 bonding agent Substances 0.000 claims description 18
- 238000005245 sintering Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 239000010451 perlite Substances 0.000 claims description 5
- 235000019362 perlite Nutrition 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 3
- 239000012774 insulation material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 18
- 238000004321 preservation Methods 0.000 description 15
- 238000007689 inspection Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- 238000000227 grinding Methods 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000011049 filling Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011094 fiberboard Substances 0.000 description 3
- GCPRNIZDNTXQIX-NBPLQZBRSA-N 1-chloro-2-(2-chloroethylsulfanyl)ethane;dichloro-[(e)-3-chloroprop-2-enyl]arsane Chemical compound ClCCSCCCl.Cl\C=C\C[As](Cl)Cl GCPRNIZDNTXQIX-NBPLQZBRSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C04B35/10—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 aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
-
- 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
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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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
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
-
- 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
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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Abstract
The invention provides a carbon roasting furnace flame path wall upper part fire-resistant brick and a preparation method thereof. The fire-resistant fire-blocking brick at the upper part of the flame path wall of the carbon roasting furnace is prepared from the following raw materials, by weight, 55-65% of granular materials, 30-40% of mixed powder and 3-5% of a binding agent; the granular material consists of carbon residue particles, bauxite chamotte and light microbead particles, or consists of carbon residue particles, bauxite chamotte, kyanite particles and light microbead particles; the mixed powder consists of soft clay powder, and two substances of kyanite powder, bauxite chamotte powder and silica powder; the binding agent is yellow dextrin powder. The invention provides a carbon baking methodFire-resistant brick on upper part of fire-resistant brick carbon roasting furnace fire-resistant brick on upper part of fire-resistant brick wall, and preparation method thereof, and volume density is controlled to be 1.6-1.7 kg/cm 2 The high-temperature heat insulation material has high compressive strength and good high-temperature heat insulation effect, and reduces fuel consumption.
Description
Technical Field
The invention relates to the field of refractory materials, in particular to a refractory fire-blocking brick at the upper part of a fire path wall of a carbon roasting furnace and a preparation method thereof.
Background
The fire path wall of the carbon roasting furnace consists of refractory brick walls on two sides, heavy refractory fire-blocking bricks on the upper part and refractory prefabricated parts with fire ports. In the prior art, the upper heavy fire-resistant fire-blocking brick has higher heat transfer rate, so that the temperature of the furnace surface is overhigh; some factories adopt to cover the heat preservation fiberboard on the fire-blocking brick to reduce the temperature of the furnace surface, but after the temperature of the carbon roasting furnace is gradually increased in the sintering process, the heat preservation fiberboard is pulverized after being used for about one year, and the pulverized heat preservation fiberboard powder is gradually extracted from brick joints by wind pressure, so that a hollow cavity with air leakage can be formed, the temperature of the furnace surface cannot be effectively reduced, the temperature of the furnace surface is too high, heat energy loss is caused, and the operating environment of staff is not good.
CN106747364a discloses a low creep clay brick for a carbon roasting furnace and a preparation method thereof, wherein the weight percentages of the components in the ingredients are as follows: 20-40% of first-grade bauxite, 30-60% of third-grade bauxite, 0-30% of low-creep clay waste bricks, 5-15% of kyanite and 5-15% of Guangxi clay; the binding agent accounts for 1-12% of the total weight of the ingredients; the bonding agent is Guangxi clay slurry with the mass concentration of 2%. The main components of the composite material are primary high-alumina bauxite, tertiary high-alumina bauxite and clay, and although the creep rate is low, the composite material has low porosity, high product volume density and poor heat insulation effect.
Disclosure of Invention
In view of the above, the invention aims to provide a fire-resistant fire-blocking brick on the upper part of a flue wall of a carbon roasting furnace and a preparation method thereof, and has good heat insulation effect.
In order to achieve the purpose, the invention provides the refractory fire-blocking brick for the upper part of the flue wall of the carbon roasting furnace and the preparation method thereof, which adopts the following technical scheme:
the fire-resistant brick for the upper part of the flame path wall of the carbon roasting furnace is prepared from the following raw materials in percentage by weight, 55-65% of granular materials, 30-40% of mixed powder and 3-5% of binding agent; the granular material consists of carbon residue particles, bauxite chamotte and light microbead particles, or consists of carbon residue particles, bauxite chamotte, kyanite particles and light microbead particles; the mixed powder consists of soft clay powder, and at least two substances of kyanite powder, bauxite chamotte powder and silica powder; the binding agent is yellow dextrin powder;
the weight percentage of the carbon residue particles in the fire-blocking brick is 5-6%, and the weight percentage of the light microbead particles in the fire-blocking brick is 2-3%.
Optionally, the material is prepared from the following raw materials in percentage by weight: 65% of granule, 31% of mixed powder and 4% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 5% of carbon residue particles, 45% of bauxite clinker particles, 12% of kyanite particles and 3% of light microbead particles; the mixture consists of the following raw materials in percentage by weight: 7% of kyanite powder, 8% of bauxite chamotte powder and 16% of soft clay powder.
Optionally, the material is prepared from the following raw materials in percentage: 60% of granule, 37% of mixed powder and 3% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 5% of carbon residue particles, 52% of bauxite clinker particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 12% of kyanite powder, 5% of silica powder and 20% of soft clay powder.
Optionally, the material is prepared from the following raw materials in percentage: the granule accounts for 55%, the mixed powder 40% and the bonding agent 5%;
the granular material consists of the following raw materials in percentage by weight: 6% of carbon residue particles, 42% of bauxite clinker particles, 5% of kyanite particles and 2% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 10% of bauxite chamotte powder, 10% of silica powder and 20% of soft clay powder.
Optionally, the material is prepared from the following raw materials in percentage: 58% of granule, 37% of mixed powder and 5% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 6% of carbon residue particles, 44% of bauxite clinker particles, 5% of kyanite particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 10% of bauxite chamotte powder, 10% of silica powder and 17% of soft clay powder.
Optionally, the material is prepared from the following raw materials in percentage: 64% of granule, 31% of mixed powder and 5% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 6% of carbon residue particles, 50% of bauxite clinker particles, 5% of kyanite particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 5% of bauxite chamotte powder, 10% of kyanite powder and 16% of soft clay powder.
Optionally, the material is prepared from the following raw materials in percentage: 60% of granule, 35% of mixed powder and 5% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 5% of carbon residue particles, 47% of bauxite clinker particles, 5% of kyanite particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 5% of bauxite chamotte powder, 10% of kyanite powder and 16% of soft clay powder.
Optionally, the carbon content in the carbon residue particles is more than 95%, and the granularity is 0.2-0.5 mm; al in the bauxite chamotte particles 2 O 3 The content is more than 55%, and the grain size is 1-5 mm; al in the kyanite particles 2 O 3 The content is more than 53%, and the grain size is 0.2-0.5 mm; the light microbead particles are closed-cell perlite, and the particle size is 0.2-0.5 mm; at least 80% of the mixed powder has granularity smaller than 0.088 mm.
The fire-resistant fire-blocking brick is of a cuboid structure, a semicircular convex rib 1 is arranged on the upper surface of the cuboid and close to the wide side of the cuboid, and the semicircular convex rib 1 is equal in length and parallel to the width of the cuboid; a semicircular groove 2 is formed in the lower surface of the cuboid and close to the wide side of the cuboid, and the semicircular groove 2 is equal in length and parallel to the width of the cuboid; a cylindrical hole 3 penetrating the upper surface and the lower surface is reserved in the middle of the cuboid.
The preparation method of the fire-resistant fire-blocking brick on the upper part of the flue wall of the carbon roasting furnace is characterized in that the raw materials in the above claims are weighed according to the proportion and put into a mixing mill for mixing and grinding to prepare pug; sending the pug into a full-automatic numerical control brick press with 450T pressure for press molding, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1380-1400 ℃, and then cooling to prepare the carbon roasting furnace flame path wall upper fire-resistant fire-blocking bricks.
The invention provides a fire-resistant fire-blocking brick on the upper part of a fire path wall of a carbon roasting furnace, which is prepared from raw materials including particles and mixed powder, wherein the particles are a framework, and the mixed powder wraps the particles to play a role in sintering.
The carbon residue particles used in the invention are a pre-buried carbon filling material for producing carbon products, and the carbon products are prepared by changing the properties of coal through deep processing of high-purity anthracite; the light microbead particles are closed-cell perlite, the closed-cell perlite is also called vitrified microbeads, the vitrified microbeads are hollow spherical particles which are produced from low temperature to high temperature through a vitrified furnace by taking natural ore perlite volcanic rock as a raw material, and the surface vitrified belt is hard shell and internally honeycomb-shaped, and the vitrified microbeads have stable physical and chemical properties, strong aging resistance and weather resistance, and excellent heat insulation, fire resistance and sound absorption performance. The carbon residue particles are combustible objects, are burned out to form powder ash after high-temperature combustion, and form gaps in the product, so that the weight of the product is lightened, and the burned out gaps are utilized to play a role in heat insulation and heat preservation; the carbon residue is left with a small amount of ash powder which can not be removed after high-temperature burning loss, the light microbead particles have better burning loss at high temperature, and the light microbead particles are added as filling materials to make up for the defect that the carbon residue is lost into ash powder at high temperature.
The bauxite chamotte and the kyanite are respectively prepared into particles or added into powder, the bauxite chamotte particles and the kyanite particles can serve as aggregates of the fire-blocking bricks, and the powder can increase the wrapping degree of the particles and form more complete mixing with the particles.
Bauxite clinker is high temperature resistant, but has the problem of volume shrinkage, kyanite forms a good mullite phase at high temperature and has the characteristic of volume expansion, and the addition of the material can improve the volume stability performance of the fire-blocking brick at high temperature, for example, the fire-blocking brick does not shrink; the silica powder has the characteristic of volume expansion, and after the material is added, the volume stability of the product at a high temperature can be improved, and the product does not shrink and is used complementarily with the blue crystal stone material. The soft clay powder has the characteristic of sticky cementation, can uniformly wrap the raw materials in the mixing and grinding process, increases the flexibility of a raw material mixture, is convenient for compression molding, and ensures that the raw materials are fully combined and firmly sintered together in a high-temperature state. The yellow lake fine powder is used as a binding agent of a semi-finished product, various materials are mutually bound together in the manufacturing process, the binding strength of the semi-finished product is improved, the breakage rate of the semi-finished product is reduced, and the semi-finished product is convenient to transport and enter a kiln for firing.
The fire-blocking brick has good heat insulation effect and high strength, greatly reduces the heat transfer in the fire-path wall to the upper part, reduces the temperature of the furnace surface, ensures that operators receive less heat radiation, and reduces the fuel consumption. The carbon residue particles are a pre-buried carbon filling material for producing carbon products, and the pre-buried carbon residue particles are discarded as small particle powder materials under a sieve of 0.2-0.5 mm of the pre-buried carbon filling material.
Drawings
FIG. 1 is a schematic diagram of the structure of a fire-resistant fire-blocking brick on the upper part of a flue wall of a carbon roasting furnace;
FIG. 2 is a schematic diagram of a construction structure of the upper refractory firestop brick of the flue wall of the carbon roasting furnace provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
The shape of the fire-blocking brick manufactured by the invention is shown in figure 1, the fire-blocking brick is of a cuboid structure, a semicircular convex rib 1 is arranged on the upper surface of the cuboid and is close to the wide side of the cuboid, and the semicircular convex rib 1 is equal in length and parallel to the width of the cuboid; a semicircular groove 2 is formed in the lower surface of the cuboid and close to the wide side of the cuboid, and the semicircular groove 2 is equal in length and parallel to the width of the cuboid; a cylindrical hole 3 penetrating the upper surface and the lower surface is left in the middle of the cuboid.
As shown in figure 2, the invention is a schematic diagram of the masonry structure of the fire-blocking brick, the fire-resistant fire-blocking brick 4 on the upper part of the fire-path wall of the carbon roasting furnace is built on the fire-path wall 5, and the semicircular groove 2 on the lower surface of the fire-blocking brick 4 is inlaid with the semicircular convex rib on the refractory brick on the fire-path wall 5. Then, the fireproof prefabricated member 6 with the fire hole is placed on the fire-blocking brick 4, and the semicircular convex rib 1 on the upper surface of the fire-blocking brick 4 and the semicircular groove on the lower surface of the fireproof prefabricated member 6 are inlaid together, so that the masonry is completed.
The embodiment of the invention limits the granularity of the raw materials: the grain size of the carbon residue is 0.2-0.5 mm, the grain size of the bauxite clinker is 1-5 mm, the grain size of the kyanite is 0.2-0.5 mm, the grain size of the light microbead is 0.2-0.5 mm, and at least 80% of the mixed powder has the grain size smaller than 0.088 mm. According to the embodiment of the invention, the particle size of the limited particle material is more than or equal to 0.2mm, the particle size of 80% of the limited mixed powder is less than 0.088 mm, so that the particle material particles can play a role of a skeleton, and the mixed powder plays a role of wrapping the particles.
In the embodiment of the invention, the following steps are included: bulk density detection is carried out according to GB/T2997-2015, normal temperature compressive strength is detected according to GB/T5072-2008, load softening temperature is detected according to YB/T370-2016, and Al 2 O 3 The content is according to GB/T21114-2019. The line change rate was measured according to GB/T5988-2007, and the thermal conductance was measured according to YB/T4130-2005.
The invention is further described below in connection with specific embodiments.
Example 1
In the embodiment, the proportion of the granular material is 65%, the proportion of the mixed powder is 31%, and the proportion of the binding agent yellow lake fine powder is 4%.
The components and contents of the granule and the mixed powder are as follows:
the granule comprises the following raw materials in percentage by weight: carbon residue granule 5%
45% of bauxite chamotte particles
Kyanite particles 12%
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
Soft clay powder 16%
The preparation method comprises the following steps:
weighing the raw materials according to a proportion, and putting the raw materials into a mixing mill for mixing and grinding to prepare pug; sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1390 ℃, and firing, cooling, kiln discharging, inspection and selection, packaging, and qualified delivery after inspection, so as to obtain the light heat-preservation fire-blocking bricks.
Prepared in this example fire-blocking brick detection result: al (Al) 2 O 3 Content 46%, volume density: 1.65kg/cm 2 Normal temperature compressive strength: 45MPa, heat conductivity coefficient (W/m.k 800 ℃) 0.62, softening temperature under load (0.2 MPa, 0.5%) 1425 ℃, and burn-in line change rate (1400 ℃ multiplied by 3 h) -0.02%.
Example two
In this embodiment: 60% of granule material, 37% of mixture material and 3% of binding agent yellow dextrin powder.
The granule comprises the following raw materials in percentage by weight: carbon residue granule 5%
Bauxite chamotte granule 52%
3% of light microbead particles;
the mixed powder consists of the following raw materials in percentage by weight: kyanite powder 12%
20% of soft clay powder.
The preparation method comprises the following steps:
weighing the raw materials according to a proportion, and putting the raw materials into a mixing mill for mixing and grinding to prepare pug; sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1380 ℃, and firing, cooling, kiln discharging, inspection, selection and packaging the green bricks, and delivering qualified products after inspection, thus obtaining the light heat-preservation fire-blocking bricks.
Prepared in this exampleFire-blocking brick detection result: al (Al) 2 O 3 45% of the content, volume density: 1.66kg/cm 2 Normal temperature compressive strength: 46MPa, heat conductivity coefficient (W/m.k 800 ℃) 0.63, softening temperature under load (0.2 MPa, 0.5%) 1430 ℃, and burn-in line change rate (1400 ℃ C. Multiplied by 3 h) -0.05%.
Example III
In this embodiment: the granule accounts for 55%, the mixed powder 40% and the bonding agent 5%;
the granule comprises the following raw materials in percentage by weight: 6% of carbon residue particles
Bauxite chamotte granule 42%
2% of light microbead particles
The mixed powder consists of the following raw materials in percentage by weight: bauxite chamotte powder 10%
Silica powder 10%
20% of soft clay powder.
And (2) a binding agent: yellow dextrin powder binder 4%
The preparation method comprises the following steps:
the raw materials are weighed according to the proportion and put into a mixing mill for mixing and grinding to prepare pug. Sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1390 ℃, and firing, cooling, kiln discharging, inspection and selection, packaging, and qualified delivery after inspection, so as to obtain the light heat-preservation fire-blocking bricks.
Detection result: al (Al) 2 O 3 Content 43%, volume density: 1.66kg/cm 2 Normal temperature compressive strength: 53Mpa, a heat conductivity coefficient (W/m.k 800 ℃) of 0.58, a softening temperature under load (0.2 Mpa, 0.5%) of 1420 ℃, and a burn-in line change rate (1400 ℃ C. Times.3 h) of 0.03%.
Example IV
The granule of the embodiment accounts for 58 percent, 37 percent of mixed powder and 5 percent of bonding agent;
the granule comprises the following raw materials in percentage by weight: 6% of carbon residue particles
Bauxite chamotte granule 44%
The mixed powder consists of the following raw materials in percentage by weight: bauxite chamotte powder 10%
Silica powder 10%
17% of soft clay powder.
The preparation method comprises the following steps: weighing the raw materials according to a proportion, and putting the raw materials into a mixing mill for mixing and grinding to prepare pug; sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1380 ℃, and firing, cooling, kiln discharging, inspection, selection and packaging the green bricks, and delivering qualified products after inspection, thus obtaining the light heat-preservation fire-blocking bricks.
Detection result: al (Al) 2 O 3 45% of the content, volume density: 1.68kg/cm 2 Normal temperature compressive strength: 52Mpa, heat conductivity coefficient (W/m.k 800 ℃) 0.65, softening temperature under load (0.2 Mpa, 0.5%) 1430 ℃, and burn-in line change rate (1400 ℃ C. X3 h) -0.03%.
Example five
In this example, the particle ratio: 64%, 31% of mixed powder and 5% of bonding agent.
The granule comprises the following raw materials in percentage by weight: 6% of carbon residue particles
Bauxite chamotte granule 50%
Mixed powder: kyanite powder 10%
16% of soft clay powder.
The preparation method comprises the following steps: weighing the raw materials according to a proportion, and putting the raw materials into a mixing mill for mixing and grinding to prepare pug; sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1400 ℃, and firing, cooling, kiln discharging, checking and packaging the green bricks, and leaving a factory after the checking is qualified, thus obtaining the light heat-preservation fire-blocking bricks.
Detection result: al (Al) 2 O 3 Content 47%, volume density: 1.67kg/cm2, compressive strength at ordinary temperature: 55Mpa, heat conductivity (W/m.k 800 ℃) 0.67, softening temperature under load (0.2 Mpa, 0.5%) 1440 ℃, and burn-in line change rate (1400 ℃ C. X3 h) -0.05%.
Example six
In this embodiment: 60% of granule material, 35% of mixed powder and 5% of bonding agent.
The granule comprises the following raw materials in percentage by weight: carbon residue granule 5%
Bauxite chamotte granule 47%
The mixed powder consists of the following raw materials in percentage by weight: bauxite chamotte powder 10%
20% of soft clay powder.
The preparation method comprises the following steps: weighing the raw materials according to a proportion, and putting the raw materials into a mixing mill for mixing and grinding to prepare pug; sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1390 ℃, and firing, cooling, kiln discharging, inspection and selection, packaging, and qualified delivery after inspection, so as to obtain the light heat-preservation fire-blocking bricks.
The detection result of the fire blocking brick in the embodiment is as follows: al (Al) 2 O 3 45% of the content, volume density: 1.68kg/cm 2 Normal temperature compressive strength: 47Mpa, a heat conductivity coefficient (W/m.k 800 ℃) of 0.63, a softening temperature under load (0.2 Mpa, 0.5%) of 1430 ℃, and a burn-in line change rate (1400 ℃ C. Times.3 h) of 0.05%.
Example seven
In this embodiment: the granule material accounts for 65 percent, the mixed powder accounts for 30 percent, and the bonding agent accounts for 5 percent.
The granule comprises the following raw materials in percentage by weight: carbon residue granule 5%
45% of bauxite chamotte particles
Kyanite particles 12%
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
15% of soft clay powder.
The preparation method comprises the following steps: weighing the raw materials according to a proportion, and putting the raw materials into a mixing mill for mixing and grinding to prepare pug; sending the prepared pug into a full-automatic numerical control brick press with 450T pressure to press and mold, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1390 ℃, and firing, cooling, kiln discharging, inspection and selection, packaging, and qualified delivery after inspection, so as to obtain the light heat-preservation fire-blocking bricks.
Detection result: al (Al) 2 O 3 Content 48%, volume density: 1.67kg/cm 2 Normal temperature compressive strength: 45Mpa, heat conductivity coefficient (W/m.k 800 ℃) 0.62, softening temperature under load (0.2 Mpa, 0.5%) 1425 ℃, and burn-in line change rate (1400 ℃ x 3 h) -0.02%.
Comparative example one
The granule comprises the following raw materials in percentage by weight:
bauxite chamotte granule 53%
Kyanite particles 12%
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
Soft clay powder 16%
Comparative example one the content of bauxite chamotte particles was increased relative to example one by removing carbon residues and light microbead particles; the preparation method is the same as in example one.
Comparative example one prepared firestop brick test results: al (Al) 2 O 3 Content 48%, volume density: 2.15kg/cm 2 Normal temperature compressive strength: 48Mpa, heat conductivity (W/m.k 800 ℃) 1.0, softening temperature under load (0.2 Mpa, 0.5%) 1420 ℃, and burn-in line change rate (1400 ℃ C. X3 h) -0.04%.
Comparative example one has an increased bulk density, increased compressive strength, increased thermal conductivity, and less variation in other parameters than example one; the volume density is increased, the heat conductivity coefficient is also increased, and the requirement of high-temperature heat preservation cannot be met.
Comparative example two
The granule comprises the following raw materials in percentage by weight: 7% of carbon residue particles
45% of bauxite chamotte particles
Kyanite particles 12%
1% of light microbead particles
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
Soft clay powder 16%;
comparative example two was prepared in the same manner as in example one by increasing the carbon residue content by more than 6% and decreasing the light microbead particle content relative to example one.
The fire-blocking brick prepared in the second comparative example has the following detection results: al (Al) 2 O 3 Content 46%, volume density: 1.72kg/cm 2 Normal temperature compressive strength: 42Mpa, heat conductivity coefficient (W/m.k 800 ℃) 0.62, softening temperature under load (0.2 Mpa, 0.5%) 1420 ℃, burn-in line change rate (1400 ℃ C. X3 h) -0.06%.
Comparative example two compared to example one, the bulk density was increased to 1.72kg/cm 2 The normal temperature compressive strength is slightly reduced, the heat conductivity coefficient is unchanged, but the change rate of the re-firing line is larger, which indicates that the firestop brick of the second comparative example is unstable at high temperature and cannot meet the production requirement.
Comparative example three
The granule comprises the following raw materials in percentage by weight: carbon residue granule 8%
45% of bauxite chamotte particles
Kyanite particles 12%
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
Soft clay powder 16%;
comparative example III the same procedure as in example one was followed except that the light microbead particles were removed and the carbon particles were added to 8%.
Comparative example three preparationThe fire-blocking brick detection result: al (Al) 2 O 3 Content 46%, volume density: 1.75kg/cm 2 Normal temperature compressive strength: 41Mpa, heat conductivity coefficient (W/m.k 800 ℃) 0.62, softening temperature under load (0.2 Mpa, 0.5%) 1380 ℃, and burn-in line change rate (1400 ℃ x 3 h) -0.08%.
In the third comparative example, compared with the first example, the volume density is increased, the normal-temperature compressive strength is slightly reduced, the load softening temperature is slightly reduced, and the rate of change of the re-burning line is most reduced; although the heat preservation effect can be achieved, the load softening temperature and the rate of change of the re-firing line cannot meet the production requirements.
Comparative example four
The granule comprises the following raw materials in percentage by weight: 3% of carbon residue particles
45% of bauxite chamotte particles
Kyanite particles 12%
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
Soft clay powder 16%;
comparative example IV the same procedure as in example one was followed except that the amount of light microbead particles was increased and the amount of carbon particles was decreased to 3% relative to example one.
Comparative example four firestop brick test results prepared: al (Al) 2 O 3 Content 46%, volume density: 1.56kg/cm 2 Normal temperature compressive strength: 40Mpa, heat conductivity coefficient (W/m.k 800 ℃) 0.58, softening temperature under load (0.2 Mpa, 0.5%) 1300 ℃, and burn-in line change rate (1400 ℃ C. X3 h) -0.03%.
Compared with the first embodiment, the fourth embodiment has the advantages that the volume density is reduced, the normal-temperature compressive strength is reduced, the load softening temperature is reduced, the change rate of the burn-in line is not greatly changed, the heat conductivity coefficient is reduced, the heat preservation effect can be realized, the load softening temperature is not high, the normal-temperature compressive strength is not too high, and the production requirement cannot be met.
Comparative example five
The granule comprises the following raw materials in percentage by weight: 7% of carbon residue particles
45% of bauxite chamotte particles
Kyanite granule 10%
4% of light microbead particles
The mixed powder consists of the following raw materials in parts by weight: kyanite powder 7%
Bauxite chamotte powder 8%
Soft clay powder 16%;
comparative example five the contents of carbon residue particles and light microbead particles were increased based on example five, and the content of kyanite particles was reduced, as in example five.
Detection result: al (Al) 2 O 3 Content 47%, volume density: 1.53kg/cm2, compressive strength at ordinary temperature: 45Mpa, heat conductivity coefficient (W/m.k 800 ℃) 0.55, softening temperature under load (0.2 Mpa, 0.5%) 1300 ℃, and burn-in line change rate (1400 ℃ C. X3 h) -0.07%.
Compared with the fifth embodiment, the fifth embodiment has the advantages that the volume density is greatly reduced, the normal-temperature compressive strength is reduced, the load softening temperature is reduced, and the rate of change of the re-burning line is correspondingly reduced; the thermal conductivity coefficient is reduced, and the heat preservation effect can be achieved, but the volume density is reduced too much, the softening temperature under load is not too high, and the production requirement cannot be met.
By comparison, it was found that: the volume density of the fire-blocking brick reaches 1.6-1.7 kg/cm 2 The index of the change rate of the re-firing line, the normal-temperature compressive strength, the heat conductivity coefficient and the load softening temperature can meet the production requirement of the roasting furnace; the carbon residue particles are 5% -6%, the light microbead particles are 2% -3%, and the carbon residue particles and the light microbead particles are matched for use and cooperate with other substances in the fire-resistant brick, so that the high-temperature heat insulation effect can be met, and the requirements of the index of the change rate of a re-firing line, the normal-temperature compressive strength, the heat conductivity coefficient and the softening temperature under load can be met. The fire-blocking brick has good high-temperature heat insulation effect, reduces the temperature of the surface of the roasting furnace while reducing the fuel consumption, improves the operating environment of staff and improves work efficiency.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The refractory fire-resistant brick for the upper part of the flue wall of the carbon roasting furnace is characterized by being prepared from the following raw materials in percentage by weight, 55-65% of granular materials, 30-40% of mixed powder and 3-5% of binding agent; the granular material consists of carbon residue particles, bauxite chamotte and light microbead particles, or consists of carbon residue particles, bauxite chamotte, kyanite particles and light microbead particles; the mixed powder consists of soft clay powder, and at least two substances of kyanite powder, bauxite chamotte powder and silica powder; the binding agent is yellow dextrin powder;
the weight percentage of the carbon residue particles in the fire-blocking brick is 5-6%, and the weight percentage of the light microbead particles in the fire-blocking brick is 2-3%.
2. The refractory firestop brick for the upper part of the flue wall of a carbon baking furnace according to claim 1, which is characterized by being prepared from the following raw materials in percentage by weight: 65% of granule, 31% of mixed powder and 4% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 5% of carbon residue particles, 45% of bauxite clinker particles, 12% of kyanite particles and 3% of light microbead particles; the mixture consists of the following raw materials in percentage by weight: 7% of kyanite powder, 8% of bauxite chamotte powder and 16% of soft clay powder.
3. The refractory firestop brick of the upper part of the firestop wall of a carbon baking furnace according to claim 1, which is characterized by being prepared from the following raw materials in percentage by weight: 60% of granule, 37% of mixed powder and 3% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 5% of carbon residue particles, 52% of bauxite clinker particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 12% of kyanite powder, 5% of silica powder and 20% of soft clay powder.
4. The refractory firestop brick of the upper part of the firestop wall of a carbon baking furnace according to claim 1, which is characterized by being prepared from the following raw materials in percentage by weight: the granule accounts for 55%, the mixed powder 40% and the bonding agent 5%;
the granular material consists of the following raw materials in percentage by weight: 6% of carbon residue particles, 42% of bauxite clinker particles, 5% of kyanite particles and 2% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 10% of bauxite chamotte powder, 10% of silica powder and 20% of soft clay powder.
5. The refractory firestop brick of the upper part of the firestop wall of a carbon baking furnace according to claim 1, which is characterized by being prepared from the following raw materials in percentage by weight: 58% of granule, 37% of mixed powder and 5% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 6% of carbon residue particles, 44% of bauxite clinker particles, 5% of kyanite particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 10% of bauxite chamotte powder, 10% of silica powder and 17% of soft clay powder.
6. The refractory firestop brick of the upper part of the firestop wall of a carbon baking furnace according to claim 1, which is characterized by being prepared from the following raw materials in percentage by weight: 64% of granule, 31% of mixed powder and 5% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 6% of carbon residue particles, 50% of bauxite clinker particles, 5% of kyanite particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 5% of bauxite chamotte powder, 10% of kyanite powder and 16% of soft clay powder.
7. The refractory firestop brick of the upper part of the firestop wall of a carbon baking furnace according to claim 1, which is characterized by being prepared from the following raw materials in percentage by weight: 60% of granule, 35% of mixed powder and 5% of bonding agent;
the granular material consists of the following raw materials in percentage by weight: 5% of carbon residue particles, 47% of bauxite clinker particles, 5% of kyanite particles and 3% of light microbead particles; the mixed powder consists of the following raw materials in percentage by weight: 5% of bauxite chamotte powder, 10% of kyanite powder and 16% of soft clay powder.
8. The refractory firestop brick for the upper part of the flame path wall of a carbon roasting furnace according to claims 1-7, wherein the carbon content in the carbon residue particles is more than 95%, and the granularity is 0.2-0.5 mm; al in the bauxite chamotte particles 2 O 3 The content is more than 55%, and the grain size is 1-5 mm; al in the kyanite particles 2 O 3 The content is more than 53%, and the grain size is 0.2-0.5 mm; the light microbead particles are closed-cell perlite, and the particle size is 0.2-0.5 mm; at least 80% of the mixed powder has granularity smaller than 0.088 mm.
9. The fire-resistant fire-blocking brick on the upper part of the fire path wall of the carbon roasting furnace of claim 1-8, which is characterized in that the fire-blocking brick is of a cuboid structure, a semicircular convex rib (1) is arranged on the upper surface of the cuboid and is close to the wide side of the cuboid, and the semicircular convex rib (1) is equal in length and parallel to the width of the cuboid; a semicircular groove (2) is formed in the lower surface of the cuboid and close to the wide side of the cuboid, and the semicircular groove (2) is equal in length and parallel to the width of the cuboid; and a cylindrical hole (3) penetrating through the upper surface and the lower surface is reserved in the middle of the cuboid.
10. The method for preparing the refractory fire-blocking brick on the upper part of the flame path wall of the carbon roasting furnace according to claim 1-8, which is characterized in that raw materials in the above claim are weighed according to a proportion, and put into a mixing mill to be mixed and ground into pug; sending the pug into a full-automatic numerical control brick press with 450T pressure for press molding, and drying the molded green bricks by a dryer at 110-200 ℃; and (3) delivering the dried green bricks into a high-temperature tunnel kiln for firing, wherein the sintering temperature is 1380-1400 ℃, and then cooling to prepare the carbon roasting furnace flame path wall upper fire-resistant fire-blocking bricks.
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