CN113582687B - Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof - Google Patents

Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof Download PDF

Info

Publication number
CN113582687B
CN113582687B CN202110995036.8A CN202110995036A CN113582687B CN 113582687 B CN113582687 B CN 113582687B CN 202110995036 A CN202110995036 A CN 202110995036A CN 113582687 B CN113582687 B CN 113582687B
Authority
CN
China
Prior art keywords
parts
powder
mixing
particle size
refractory material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110995036.8A
Other languages
Chinese (zh)
Other versions
CN113582687A (en
Inventor
张卫星
张晟
王晓杰
许英
李业清
吴俊杰
裴一新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yixing Xingbei Refractory Insulation Engineering Co ltd
Original Assignee
Yixing Xingbei Refractory Insulation Engineering Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yixing Xingbei Refractory Insulation Engineering Co ltd filed Critical Yixing Xingbei Refractory Insulation Engineering Co ltd
Priority to CN202110995036.8A priority Critical patent/CN113582687B/en
Publication of CN113582687A publication Critical patent/CN113582687A/en
Application granted granted Critical
Publication of CN113582687B publication Critical patent/CN113582687B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • 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
    • 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
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • 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
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62802—Powder coating materials
    • C04B35/62805—Oxide ceramics
    • C04B35/62807—Silica or silicates
    • 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
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62802—Powder coating materials
    • C04B35/62805—Oxide ceramics
    • C04B35/62813—Alumina or aluminates
    • 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
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62802—Powder coating materials
    • C04B35/62828—Non-oxide ceramics
    • C04B35/62839—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
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628—Coating the powders or the macroscopic reinforcing agents
    • C04B35/62894—Coating the powders or the macroscopic reinforcing agents with more than one coating layer
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
    • 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
    • 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
    • C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
    • 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
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—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
    • 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
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • 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
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
    • 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
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)

Abstract

The invention relates to the technical field of refractory materials, and discloses a refractory material for key parts of a durable hazardous waste incinerator and a preparation method thereof; the refractory material comprises the following components in parts by mass: 120-180 parts of zirconium oxide, 90-125 parts of silica powder, 35-60 parts of kaolin powder, 35-60 parts of Guangxi white mud powder, 30-56 parts of magnesia-alumina spinel, 26-42 parts of nanocarbon, 25-40 parts of forsterite powder, 24-30 parts of a binding agent, 18-22 parts of a foaming stock solution and 6-10 parts of resin particles; the preparation method comprises the following steps: preparing a coating raw material A; preparing a coating raw material B; coating for the first time; coating for the second time; the invention can prolong the service life of the refractory material by improving the thermal shock resistance of the refractory material, and reduce the energy consumption of the incinerator by reducing the heat conductivity coefficient of the refractory material.

Description

Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof
Technical Field
The invention relates to the technical field of refractory materials, in particular to a refractory material for key parts of a durable hazardous waste incinerator and a preparation method thereof.
Background
The incinerator is generally adopted to treat the hazardous waste pollution source, and along with the gradual increase of the hazardous waste pollution garbage in China, the energy consumption problem is concerned more and more widely. The incinerator is the core equipment for hazardous waste incineration treatment, and the energy consumption of the incinerator often determines the energy consumption of the whole treatment system. The transition zone and the burning zone become the parts with the fastest heat dissipation due to the higher local temperature, so the refractory materials at the transition zone and the burning zone are easy to damage and fall off, and the incinerator cannot work normally.
The first technical problem existing in the prior art is that: the refractory material used in the incinerator has poor heat preservation and heat insulation performance due to high heat conductivity coefficient, causes overlarge energy consumption and is extremely unfriendly to the environment; the second technical problem is that: the traditional refractory material has weak thermal shock resistance and cannot resist damage caused by temperature fluctuation in the incinerator, so that the service life of the refractory material is shortened.
Disclosure of Invention
The invention solves the technical problems that: the service life of the refractory material is prolonged by improving the thermal shock resistance of the refractory material, and the energy consumption of the incinerator is reduced by reducing the heat conductivity coefficient of the refractory material.
The technical scheme of the invention is as follows: a refractory material for key parts of a durable hazardous waste incinerator comprises the following components in parts by mass: 120-180 parts of zirconium oxide, 90-125 parts of silica powder, 35-60 parts of kaolin powder, 35-60 parts of Guangxi white mud powder, 30-56 parts of magnesia-alumina spinel, 26-42 parts of nanocarbon, 25-40 parts of forsterite powder, 24-30 parts of a binding agent, 18-22 parts of foaming stock solution and 6-10 parts of resin particles.
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting 30-56 parts of magnesium aluminate spinel powder with the particle size of 45-60 mu m into a mixing chamber, and then adding 26-42 parts of nanocarbon with the particle size of 30-60 nm and continuously stirring for 20-40 min; then adding 6-10 parts of resin particles, and grinding for 25-35 min; pressurizing to 80-120 Mpa by adopting a hydraulic mould until the block is formed; then rolling and crushing, and drying at 160-200 ℃ for 6-10 h to obtain a coating raw material A with the particle size of 60-80 microns for later use;
s2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 45-60 mu m, adding 30-52% of clear water, and stirring for 3-6 h to obtain a foam slurry-like coating raw material B for later use;
s3: first application
Firstly, mixing the coating raw material A prepared in the step S1 with kaolin powder for 30-60 min, then adding zirconium oxide, and stirring and mixing for 120-200 min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 1-2 mm; drying the obtained spheres for 30-60 min, and then preserving heat at 1100-1400 ℃ for 2-4 h to obtain a coating main material;
s4: second application of
And (4) sequentially adding Guangxi white mud powder and the coating main material obtained in the step (S3) into the foam slurry coating raw material B obtained in the step (S2), mixing for 2-3 hours, drying for 180-240 min at 600-800 ℃, and performing rolling crushing treatment to prepare the refractory material with the particle size of 80-120 microns.
S5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with a bonding agent, and pressing the mixture into a brick-shaped blank by adopting a hydraulic die under the pressure of 100-130 Mpa; and drying the brick-shaped blank for 24-36 h, and firing at 1100-1600 ℃ for 3-4 h to obtain the refractory brick.
Further, the binding agent is one of dextrin, calcium lignosulfonate and aluminum dihydrogen phosphate solution; the bonding agent can effectively bond the unshaped refractory materials together, so that the unshaped refractory materials have strength.
Further, the zirconia includes zirconia fine powder and monoclinic zirconia fine powder; the mass ratio of the zirconia fine powder to the monoclinic zirconia fine powder is 2: 3 to 5. The problem of poor bonding property with a matrix material exists when the traditional zirconia hollow sphere particles are simply adopted; by mixing the components in the proportion, a network skeleton structure can be formed during sintering, and the bonding strength with a matrix material is enhanced.
Further, the zirconia fine powder is subjected to electric melting treatment: and fully mixing the zirconia fine powder and coke according to the mass ratio of 43-53: 1, putting the mixture into an electric arc furnace, carrying out melting reduction at 1900-2200 ℃, preserving heat for 2-5 hours, and naturally cooling and separating to obtain the fused zirconia fine powder.
The treated zirconia has the characteristics of high porosity and micropore porosity, and the sintering activity is high; the material formed by mixing the superfine powder of the monoclinic zirconia and the superfine powder of the monoclinic zirconia has the characteristics of light weight, high strength and high-efficiency heat insulation.
Further, the magnesium aluminate spinel is subjected to modification treatment: the preparation method comprises the steps of proportioning the magnesia-alumina spinel and the polystyrene according to the mass ratio of 1:1, spraying polyvinyl alcohol accounting for 3-6% of the total mass of the magnesia-alumina spinel and the polystyrene, carrying out balling treatment to obtain powder particles of 45-60 mu m, and finally drying at 80-90 ℃ for 3-6 hours.
The magnesium aluminate spinel after the modification treatment can enable carbon to be more uniformly dispersed on the surface of magnesium aluminate spinel grains or among grain boundaries, so that the thermal shock resistance is effectively improved;
the main reason is that the nano carbon in the mixed material is uniformly distributed, and cracks can be expanded into the mixed material, so that the expansion path is increased, and the strain energy is greatly consumed; when the crack is in the action zone, the crack is subjected to the compressive stress on the main crack generated by volume expansion to block the crack from expanding, so that the fracture toughness of the material is improved, and the thermal shock resistance of the material is improved.
Further, the magnesium aluminate spinel is industrial Al 2O3And light-burned MgO according to the mass ratio of 1: 1, mixing the ingredients, and calcining for 2-3 hours at 1100-1200 ℃. The powder prepared by the method has the advantages of fine and uniform particles, good dispersibility, low cost, short period and convenient operation.
Further, SiO in the silica powder2Content (c) of>95％，Al2O3The content is 1 to 3 percent; the particle size is 30 to 66 μm.
The invention has the beneficial effects that: the preparation method of the refractory material provided by the invention can obtain the light refractory material with low heat conductivity and good heat insulation effect, and compared with the traditional technology, the preparation method of the refractory material also greatly improves the thermal shock resistance of the refractory material; the coating raw material A formed by compounding magnesium aluminate spinel and nano carbon can mix and wrap zirconia under the action of kaolin powder, so that the refractory material with good heat conductivity coefficient and thermal shock resistance effect is obtained; the coating raw material B formed by the forsterite powder, the silica powder and the foaming stock solution can be secondarily mixed with the coating main material, so that higher porosity can be formed, air holes are finer and uniformly distributed, the heat conductivity coefficient is further effectively reduced, and the heat insulation effect of the refractory material is improved; the refractory material at the key part of the incinerator can effectively resist the damage caused by temperature fluctuation in the incinerator through the enhancement of thermal shock resistance, so that the service life of the refractory material is prolonged; the energy consumption of the incinerator can be reduced to a certain extent through the reduction of the heat conductivity coefficient.
Detailed Description
Example 1:
a refractory material for key parts of a durable hazardous waste incinerator comprises the following components in parts by mass: 120 parts of zirconia, 90 parts of silica powder, 35 parts of kaolin powder, 35 parts of Guangxi white mud powder, 30 parts of magnesia-alumina spinel, 26 parts of nano-carbon, 25 parts of forsterite powder, 24 parts of a binding agent, 18 parts of foaming stock solution and 6 parts of resin particles.
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting the magnesium-aluminum spinel powder with the particle size of 45 mu m into a mixing chamber, then adding the nano carbon with the particle size of 30nm, and continuously stirring for 20 min; adding resin particles, and grinding for 25 min; pressurizing to 80Mpa by using a hydraulic die until a block is formed; then rolling and crushing the mixture, and drying the mixture for 6 hours at 160 ℃ to obtain a coating raw material A with the particle size of 60 mu m for later use;
s2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 45 mu m, adding 30% of clear water, and stirring for 3h to obtain a foam slurry-like coating raw material B for later use;
SiO in the silica powder296% of Al2O3The content is 1.2%; the grain diameter is 30 mu m;
s3: first application
Firstly, mixing the coating raw material A prepared in the step S1 with kaolin powder for 30min, then adding zirconium oxide, and stirring and mixing for 120min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 1 mm; drying the obtained spheres for 30min, and then preserving heat at 1100 ℃ for 2h to obtain a coating main material;
S4: second application of
And (4) sequentially adding Guangxi white mud powder and the coating main material obtained in the step (S3) into the foam slurry coating raw material B obtained in the step (S2), mixing for 2 hours, drying for 180min at 600 ℃, and carrying out rolling crushing treatment to prepare the refractory material with the particle size of 80 microns.
S5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with dextrin, and pressing the mixture into brick-shaped blanks by adopting a hydraulic die under 100 Mpa; then drying the brick-shaped blank for 24h, and firing at 1100 ℃ for 3h to obtain the refractory brick.
Example 2:
a refractory material for key parts of a durable hazardous waste incinerator comprises the following components in parts by mass: 180 parts of zirconium oxide, 125 parts of silica powder, 60 parts of kaolin powder, 60 parts of Guangxi white mud powder, 56 parts of magnesia-alumina spinel, 42 parts of nano-carbon, 40 parts of forsterite powder, 30 parts of a bonding agent, 22 parts of a foaming stock solution and 10 parts of resin particles.
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting the magnesium-aluminum spinel powder with the particle size of 60 mu m into a mixing chamber, adding the nanocarbon with the particle size of 60nm, and continuously stirring for 40 min; adding resin particles, and grinding for 35 min; pressurizing to 120Mpa by using a hydraulic die until a block is formed; then rolling and crushing the mixture, and drying the mixture for 10 hours at 200 ℃ to obtain a coating raw material A with the particle size of 80 mu m for later use;
S2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 60 mu m, adding 52% of clear water, and stirring for 6 hours to obtain a foam slurry-like coating raw material B for later use;
SiO in the silica powder297% of Al2O3The content is 2.9%; the grain diameter is 66 mu m;
s3: first application
Mixing the coating raw material A prepared in the step S1 with kaolin powder for 60min, then adding zirconium oxide, and stirring and mixing for 200min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 2 mm; drying the obtained spheres for 60min, and keeping the temperature at 1400 ℃ for 4h to obtain a coating main material;
s4: second application of
And (4) sequentially adding Guangxi white mud powder and the coating main material obtained in the step (S3) into the foam slurry coating raw material B obtained in the step (S2), mixing for 3 hours, drying for 240min at 800 ℃, and carrying out rolling crushing treatment to prepare the refractory material with the particle size of 120 microns.
S5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with dextrin, and pressing the mixture into a brick-shaped blank under 130Mpa by using a hydraulic die; and then drying the brick-shaped blank for 36h, and firing for 4h at 1600 ℃ to obtain the refractory brick.
Example 3:
A refractory material for key parts of a durable hazardous waste incinerator comprises the following components in parts by mass: 150 parts of zirconium oxide, 100 parts of silica powder, 47 parts of kaolin powder, 47 parts of Guangxi white mud powder, 43 parts of magnesia-alumina spinel, 34 parts of nano-carbon, 32.5 parts of forsterite powder, 27 parts of a bonding agent, 20 parts of foaming stock solution and 8 parts of resin particles.
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting the magnesium-aluminum spinel powder with the particle size of 50 mu m into a mixing chamber, adding nano carbon with the particle size of 45nm, and continuously stirring for 30 min; adding resin particles, and grinding for 30 min; pressurizing to 100Mpa by using a hydraulic die until the block is formed; then rolling and crushing, and drying at 180 ℃ for 8h to obtain a coating raw material A with the particle size of 70 mu m for later use;
s2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 50 mu m, adding 42% of clear water, and stirring for 4.5h to obtain a foam slurry-like coating raw material B for later use;
SiO in the silica powder296.5% of Al2O3The content is 2.5%; the grain diameter is 48 mu m;
s3: first application
Firstly, mixing the coating raw material A prepared in the step S1 with kaolin powder for 45min, then adding zirconium oxide, and stirring and mixing for 160min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 1.5 mm; drying the obtained spheres for 45min, and then preserving heat at 1200 ℃ for 3h to obtain a coating main material;
S4: second application of
And (4) sequentially adding Guangxi white mud powder and the coating main material obtained in the step S3 into the foam slurry coating raw material B obtained in the step S2, mixing for 2.5 hours, drying for 200min at 700 ℃, and performing grinding and crushing treatment to prepare the refractory material with the particle size of 100 microns.
S5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with dextrin, and pressing the mixture into brick-shaped blanks by adopting a hydraulic die under the pressure of 120 Mpa; then the brick-shaped blank is dried for 30h and then fired for 3.5h at 1350 ℃ to obtain the refractory brick.
Example 4:
a refractory material for key parts of a durable hazardous waste incinerator comprises the following components in parts by mass: 150 parts of zirconium oxide, 95 parts of silica powder, 40 parts of kaolin powder, 40 parts of Guangxi white mud powder, 52 parts of magnesia-alumina spinel, 38 parts of nano-carbon, 30 parts of forsterite powder, 26 parts of a binding agent, 20 parts of a foaming stock solution and 8 parts of resin particles.
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting the magnesium-aluminum spinel powder with the particle size of 53 mu m into a mixing chamber, adding the nanocarbon with the particle size of 52nm, and continuously stirring for 35 min; adding resin particles, and grinding for 28 min; pressurizing to 95Mpa by adopting a hydraulic die until a block is formed; then rolling and crushing the mixture, and drying the mixture at 170 ℃ for 9 hours to obtain a coating raw material A with the particle size of 73 microns for later use;
S2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 53 mu m, adding 37% of clear water, and stirring for 4 hours to obtain a foam slurry-like coating raw material B for later use;
SiO in the silica powder296% of Al2O3The content is 2%; the particle size was 46 μm.
S3: first application
Firstly, mixing the coating raw material A prepared in the step S1 with kaolin powder for 50min, then adding zirconium oxide, and stirring and mixing for 160min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 1 mm; drying the obtained spheres for 40min, and keeping the temperature at 1200 ℃ for 4h to obtain a coating main material;
the zirconia comprises zirconia fine powder and monoclinic zirconia fine powder; the mass ratio of the zirconia fine powder to the monoclinic zirconia fine powder is 2: 3.
the zirconia fine powder is subjected to electric melting treatment; the method specifically comprises the following steps: fully mixing the zirconia fine powder and coke according to the mass ratio of 43:1, putting the mixture into an electric arc furnace, carrying out melting reduction at 1900 ℃, preserving heat for 2-5 h, and separating after natural cooling to obtain electric melting zirconia fine powder;
s4: second application of
Adding Guangxi white mud powder and the coating main material obtained in the step S3 into the foam slurry coating raw material B obtained in the step S2 in sequence, mixing for 2.8 hours, drying for 220min at 700 ℃, and performing grinding and crushing treatment to prepare a refractory material with the particle size of 100 microns;
S5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with aluminum dihydrogen phosphate solution, and pressing the mixture into brick-shaped blanks by adopting a hydraulic mould under the pressure of 120 Mpa; then drying the brick-shaped blank for 30h, and firing for 3h at 1300 ℃ to obtain the refractory brick.
Example 5:
a refractory material for key parts of a durable hazardous waste incinerator comprises the following components in parts by mass: 170 parts of zirconium oxide, 110 parts of silica powder, 55 parts of kaolin powder, 56 parts of Guangxi white mud powder, 55 parts of magnesia-alumina spinel, 39 parts of nano-carbon, 38 parts of forsterite powder, 28 parts of a bonding agent, 19 parts of a foaming stock solution and 7 parts of resin particles.
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting the magnesium-aluminum spinel powder with the particle size of 58 mu m into a mixing chamber, adding the nanocarbon with the particle size of 53nm, and continuously stirring for 38 min; adding resin particles, and grinding for 32 min; pressurizing to 118Mpa by using a hydraulic die until a block is formed; then rolling and crushing the mixture, and drying the mixture at 195 ℃ for 9 hours to obtain a coating raw material A with the particle size of 76 mu m for later use;
the magnesium aluminate spinel is subjected to modification treatment; the method comprises the following specific steps: the magnesium aluminate spinel and the polystyrene are mixed according to the mass ratio of 1:1, then polyvinyl alcohol accounting for 5% of the total mass of the magnesium aluminate spinel and the polystyrene is sprayed, and the mixture is pelletized to obtain powdery particles with the particle size of 53 mu m, and finally the powdery particles are dried for 5 hours at the temperature of 85 ℃.
The magnesia-alumina spinel is industrial Al2O3And light-burned MgO according to the mass ratio of 1: 1, mixing ingredients, and calcining for 3 hours at 1200 ℃ to obtain the catalyst;
s2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 55 mu m, adding 52% of clear water, and stirring for 6 hours to obtain a foam slurry-like coating raw material B for later use;
SiO in the silica powder2Content 96% of Al2O3The content is 2%; the particle size was 56 μm.
S3: first application
Firstly, mixing the coating raw material A prepared in the step S1 with kaolin powder for 50min, then adding zirconium oxide, and stirring and mixing for 180min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 1.6 mm; drying the obtained spheres for 55min, and keeping the temperature at 1300 ℃ for 3h to obtain a coating main material;
the zirconia comprises zirconia fine powder and monoclinic zirconia fine powder; the mass ratio of the zirconia fine powder to the monoclinic zirconia fine powder is 2: 5.
the zirconia fine powder is subjected to electric melting treatment; the method specifically comprises the following steps: fully mixing the zirconia fine powder and coke according to the mass ratio of 43:1, putting the mixture into an electric arc furnace, carrying out melting reduction at the temperature of 2200 ℃, preserving heat for 5 hours, and separating after natural cooling to obtain fused zirconia fine powder;
S4: second application of
And (4) sequentially adding Guangxi white mud powder and the coating main material obtained in the step S3 into the foam slurry-like coating raw material B obtained in the step S2, mixing for 3 hours, drying for 240min at 800 ℃, and grinding and crushing to prepare the refractory material with the particle size of 120 microns.
S5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with calcium lignosulphonate, and pressing the mixture into brick-shaped blanks by adopting a hydraulic die under 130 Mpa; and then drying the brick-shaped blank for 36h, and firing for 4h at 1600 ℃ to obtain the refractory brick.
Experimental example: preparing a refractory material by the preparation method of the above examples 1 to 5 to obtain a standard refractory brick with a size of 230mm x 114mm x 75 mm; the resulting firebricks were tested against conventional firebricks and the data reported in Table 1 below were recorded:
table 1: test data for the firebricks obtained in the examples versus conventional firebricks
Figure BDA0003233709280000101
Wherein the experimental condition of thermal shock resistance is 950 ℃, and air quenching is carried out; the experimental conditions for the thermal conductivity were 1000 ℃.
Compared with the detection results of the experimental examples, the refractory brick prepared by the invention can greatly improve the thermal shock resistance and effectively reduce the heat conductivity coefficient compared with the traditional refractory brick. Wherein, the example 5 is the best embodiment disclosed by the invention, and the thermal conductivity coefficient at 1000 ℃ can be reduced to 0.68W/(m.k) from 1.5W/(m.k) compared with the traditional refractory material; the thermal shock resistance can be improved from 6 times to 18 times under the air quenching treatment at the temperature of 950 ℃, so that the service life of the refractory material is effectively prolonged.

Claims (1)

1. A durable refractory material for key parts of a hazardous waste incinerator is characterized by comprising the following components in parts by mass:
120-180 parts of zirconium oxide
90-125 parts of silica powder
35-60 parts of kaolin powder
35-60 parts of Guangxi white mud powder
30-56 parts of magnesium aluminate spinel
26-42 parts of nano carbon
25-40 parts of forsterite powder
24-30 parts of binding agent
18-22 parts of foaming stock solution
6-10 parts of resin particles
The preparation method of the refractory material comprises the following steps:
s1: preparation of coating Material A
Putting 30-56 parts of magnesium aluminum spinel powder with the particle size of 45-60 mu m into a mixing chamber, and then adding 26-42 parts of nanocarbon with the particle size of 30-60 nm and continuously stirring for 20-40 min; then adding 6-10 parts of resin particles, and grinding for 25-35 min; pressurizing to 80-120 Mpa by using a hydraulic die until the block is formed; then rolling and crushing, and drying at 160-200 ℃ for 6-10 h to obtain a coating raw material A with the particle size of 60-80 microns for later use;
s2: preparation of coating Material B
Mixing the foaming stock solution with forsterite powder and silica powder with the particle size of 45-60 mu m, adding 30-52% of clear water, and stirring for 3-6 h to obtain a foam slurry-like coating raw material B for later use;
s3: first application
Firstly, mixing the coating raw material A prepared in the step S1 with kaolin powder for 30-60 min, then adding zirconium oxide, and stirring and mixing for 120-200 min again; granulating by adopting a disc granulation method to prepare a sphere with the particle size of 1-2 mm; drying the obtained spheres for 30-60 min, and then preserving heat at 1100-1400 ℃ for 2-4 h to obtain a coating main material;
S4: second application of
Adding Guangxi white mud powder and the coating main material obtained in the step S3 into the foam slurry coating raw material B obtained in the step S2 in sequence, mixing for 2-3 hours, drying for 180-240 min at 600-800 ℃, and performing grinding and crushing treatment to prepare a refractory material with the particle size of 80-120 microns;
s5: pressing, drying and sintering;
mixing the refractory material obtained in the step S4 with a bonding agent, and pressing the mixture into a brick-shaped blank by adopting a hydraulic die under 100-130 Mpa; then drying the brick-shaped blank for 24-36 h, and firing at 1100-1600 ℃ for 3-4 h to obtain a refractory brick;
the binding agent is one of dextrin, calcium lignosulfonate and aluminum dihydrogen phosphate solution;
the zirconia comprises zirconia fine powder and monoclinic zirconia fine powder; the mass ratio of the zirconia fine powder to the monoclinic zirconia fine powder is 2: 3-5;
the zirconia fine powder is subjected to electric melting treatment: fully mixing the zirconia fine powder and coke according to the mass ratio of 43-53: 1, putting the mixture into an electric arc furnace, carrying out melting reduction at 1900-2200 ℃, preserving heat for 2-5 h, and separating after natural cooling to obtain fused zirconia fine powder;
the magnesium aluminate spinel is subjected to modification treatment: mixing the magnesium aluminate spinel and polystyrene according to the mass ratio of 1:1, then spraying polyvinyl alcohol accounting for 3-6% of the total mass of the magnesium aluminate spinel and the polystyrene, carrying out balling treatment to obtain powder particles of 45-60 mu m, and finally drying at 80-90 ℃ for 3-6 h;
The magnesia-alumina spinel is industrial Al2O3And light-burned MgO according to the mass ratio of 1: 1, mixing ingredients, and calcining for 2-3 hours at 1100-1200 ℃ to obtain the composite material;
SiO in the silica powder2Content (c) of>95%，Al2O3The content is 1% -3%; the particle size is 30-66 mu m;
the size of the refractory brick is 230mm by 114mm by 75 mm;
drying the brick-shaped blank for 28h, and firing at 1350 ℃ for 3h to obtain the refractory brick.
CN202110995036.8A 2021-08-27 2021-08-27 Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof Active CN113582687B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110995036.8A CN113582687B (en) 2021-08-27 2021-08-27 Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110995036.8A CN113582687B (en) 2021-08-27 2021-08-27 Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof

Publications (2)

Publication Number Publication Date
CN113582687A CN113582687A (en) 2021-11-02
CN113582687B true CN113582687B (en) 2022-06-28

Family

ID=78239768

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110995036.8A Active CN113582687B (en) 2021-08-27 2021-08-27 Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof

Country Status (1)

Country Link
CN (1) CN113582687B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100463879C (en) * 2004-06-04 2009-02-25 瑞泰科技股份有限公司 Composite refractory materials of periclase-spinel-lantanum (calcium) zirconate
CN102211164A (en) * 2011-05-13 2011-10-12 无锡德乾能源设备有限公司 Application of refractory brick in casting field
DE202013012201U1 (en) * 2013-12-10 2015-08-03 Refratechnik Holding Gmbh Heavy clay fireproof product
CN109626993A (en) * 2018-11-10 2019-04-16 盐城紫环工业机械有限公司 A kind of zirconia refractory and preparation method thereof
CN112028642B (en) * 2020-08-04 2022-05-10 山东金三河新材料科技有限公司 Zirconia refractory material and preparation method thereof

Also Published As

Publication number Publication date
CN113582687A (en) 2021-11-02

Similar Documents

Publication Publication Date Title
CN103159450B (en) Production method of foamed concrete block manufactured from steel slag
CN108503371B (en) Method for preparing foamed ceramic material by using blast furnace slag and high-alumina fly ash
CN111470790B (en) Sound-absorbing ceramsite and preparation method and application thereof
CN111978090B (en) Aluminum-silicon light refractory castable and preparation method thereof
CN104725058B (en) Periclase-magnesium ferrum hercynite/forsterite composite brick
WO2017016062A1 (en) Low-calcium silicate cement, and preparation method and hardening method thereof
CN101219902A (en) Environment-protection dry type vibrating material and production method thereof
CN104355546B (en) Foam glass using basalt glass clinker and CRT (cathode ray tube) screen glass as main raw materials and preparation method of foam glass
CN112430066A (en) Light high-strength ceramsite and preparation method and application thereof
CN111875274A (en) Method for preparing ceramsite and ceramsite prepared by same
CN107188594A (en) A kind of energy-saving heat-insulating insulating brick and preparation method thereof
CN114163228B (en) Slag-stopping sliding plate of aluminum-calcium-carbon converter and preparation method thereof
CN113149624A (en) Light closed-pore ceramic material prepared from steel slag and preparation method thereof
CN112939622A (en) Method for preparing ceramsite by using chromium-containing sludge
CN107353032B (en) Foamed ceramic insulation board taking industrial inorganic hazardous wastes and refractory clay tailings as raw materials and preparation method thereof
CN104646601A (en) Molding sand for large mold core and preparation method thereof
CN111925189A (en) Composite magnesia carbon brick and preparation method thereof
CN113582687B (en) Durable refractory material for key parts of hazardous waste incinerator and preparation method thereof
CN103159449A (en) Heat-resistant concrete prepared by blast furnace dry slag
CN115716722B (en) Preparation method of fly ash-based geopolymer with adjustable mechanical properties
CN116730650A (en) Hydration heat regulation type calcium-magnesium composite expanding agent for concrete and preparation method thereof
CN112028508B (en) Gangue silicate cement clinker and preparation method thereof
CN114956799A (en) Dry-method powder-making ceramic tile/board and preparation method thereof
CN112279677A (en) High-doping-amount municipal sludge foamed ceramic and preparation method thereof
CN101555149A (en) Nanometer light composite mullite firebrick

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant