CN106830958B - Low-aluminum low-heat-conduction alkali-resistant castable - Google Patents

Low-aluminum low-heat-conduction alkali-resistant castable Download PDF

Info

Publication number
CN106830958B
CN106830958B CN201710170995.XA CN201710170995A CN106830958B CN 106830958 B CN106830958 B CN 106830958B CN 201710170995 A CN201710170995 A CN 201710170995A CN 106830958 B CN106830958 B CN 106830958B
Authority
CN
China
Prior art keywords
low
alkali
particle size
powder
resistant
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
CN201710170995.XA
Other languages
Chinese (zh)
Other versions
CN106830958A (en
Inventor
刘春乐
刘勇
程殿勇
徐彬
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.)
Beijing Lanhai Jincheng Refractory Co ltd
Original Assignee
Beijing Lanhai Jincheng Refractory 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 Beijing Lanhai Jincheng Refractory Co ltd filed Critical Beijing Lanhai Jincheng Refractory Co ltd
Priority to CN201710170995.XA priority Critical patent/CN106830958B/en
Publication of CN106830958A publication Critical patent/CN106830958A/en
Application granted granted Critical
Publication of CN106830958B publication Critical patent/CN106830958B/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
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3248—Zirconates or hafnates, e.g. zircon
    • 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
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
    • 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
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • 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
    • C04B2235/424—Carbon black
    • 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
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
    • 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
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • 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
    • 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

Abstract

The invention discloses a low-aluminum low-heat-conductivity alkali-resistant castable which comprises the following components in percentage by weight: 55-60% of flint clay; 10-15% of tabular corundum powder; 4-8% of alumina micropowder; 4-6% of composite alkali-resistant powder; 4-8% of silicon dioxide micro powder; 3-6% of microporous mullite; 4-6% of magnesium aluminate spinel; 1-2% of perovskite; 1-3% of solid pore-forming agent; 4-8% of pure calcium aluminate cement; 0.1 to 0.5 percent of water reducing agent; 0.01 to 0.1 percent of retarder. The invention has the beneficial effects that: the obtained low-aluminum low-heat-conduction alkali-resistant castable has lower aluminum content and lower heat conductivity than common castable, and on the other hand, the obtained castable can remarkably reduce the volume density and the heat conductivity of the castable and reduce the heat loss of a preheater by adding a solid pore-forming agent.

Description

Low-aluminum low-heat-conduction alkali-resistant castable
Technical Field
The invention relates to the field of casting materials, in particular to a low-aluminum low-heat-conductivity alkali-resistant casting material.
Background
The shaped bricks are not suitable for double-layer structure linings of the top cover of the preheater, the cone, the tertiary air pipe and the like, so the castable is mostly used at the positions. In the use process of the cement kiln, corrosive substances such as alkali, sulfur and the like continuously circulate in the kiln to corrode the refractory castable, finally cracks appear on the refractory castable, the service life of the refractory castable on the cement kiln is shortened, repair operation has to be frequently carried out, and normal operation of the cement kiln is influenced. Therefore, how to improve the alkali resistance of the castable to prolong the service life is a problem which needs to be solved urgently by various manufacturers. On the other hand, the preheater has a small heat loss in the working process, and how to reduce the heat loss becomes one of the technical problems to be solved at present from the viewpoints of saving energy and reducing emission.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides the low-aluminum low-heat-conductivity alkali-resistant castable which can well resist the erosion of alkaline atmosphere, has low heat conductivity coefficient on the premise of resisting the erosion of materials, can reduce the heat loss of a preheater and has the technical effects of energy conservation and emission reduction.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a low-aluminum low-heat-conductivity alkali-resistant castable comprises the following components in percentage by weight: 55-60% of flint clay; 10-15% of tabular corundum powder; 4-8% of alumina micropowder; 4-6% of composite alkali-resistant powder; 4-8% of silicon dioxide micro powder; 3-6% of microporous mullite; 4-6% of magnesium aluminate spinel; 1-2% of perovskite; 1-3% of solid pore-forming agent; 4-8% of pure calcium aluminate cement; 0.1 to 0.5 percent of water reducing agent; 0.01 to 0.1 percent of retarder.
Further, the solid pore-forming agent is one or two of the following substances: polystyrene spheres, carbon black.
Further, the water reducing agent is sodium tripolyphosphate.
Further, the retarder is one or two of the following substances: citric acid, tartaric acid, oxalic acid and maleic acid.
Further, the composite alkali-resistant powder comprises the following components: 10-20% of silicon carbide, 10-20% of zircon sand and 60-80% of fused magnesia.
Further, the raw materials meet the following criteria: the particle size of the flint clay is 1-7 meshes, and the particle size of the plate-shaped corundum powder is 325 meshes; the granularity of the alumina micro powder is less than 1 mu m; the granularity of the composite alkali-resistant powder is 200 meshes; the silicon dioxide micro powder is less than or equal to 0.5 mu m; the granularity of the microporous mullite is less than 3 mm; the particle size of the magnesium aluminate spinel is less than 3 mm; the perovskite particle size is less than 3 mm; the solid pore-forming agent is 80-120 meshes; the pure specific surface area of the calcium aluminate cement is 5500 g/cm.
The castable is particularly suitable for being used as a preheater on a cement pit production line. The invention selects flint clay (also called primary hard clay clinker) as the aggregate of the casting material, and requires Al2O3≥44%，Fe2O3<1.5 percent. The flint clay is a high-quality hard refractory clay, and has stable components, uniform texture and compact structure. According to the weight percentage, 55-60% of flint clay and 3-6% of microporous mullite particles are used as aggregate, 10-15% of tabular corundum fine powder is added, and the prepared castable has high strength. Wherein the tabular corundum is pure and is free of MgO and B2O3α -Al with coarse crystal and good growth2O3Crystal structure of Al2O3The content of (A) is more than 99%. The sheet-shaped crystal structure has small and more closed pores, the porosity is almost equivalent to that of the fused corundum, the purity is high, the volume stability is good, and the re-sintering shrinkage is very small. The mullite has the characteristics of high temperature resistance, strong thermal expansion Xiaohekang chemical erosion and the like, and compared with common mullite particles, the microporous mullite particles have lower heat conductivity coefficient. The finished castable obtained by adding the flint clay and the microporous mullite particles into the plate-shaped corundum as the castable aggregate has high toughness, can well improve the strength and the anti-scouring performance of a finished product, and can obviously improve the heat insulation performance of the finished castable and reduce the heat loss of a preheater.
The pure calcium aluminate cement is used as a hardening accelerator of the injection material, the alumina micro powder is added, the two materials are simultaneously added when the casting materials are mixed and stirred, so that the injection material can be ensured to have good fluidity during molding, and the injection material can obtain enough strength within a limited time after molding.
The water reducing agent is added to ensure that the material can achieve the self-flow effect with a small amount of added water. Pumping the casting liquid to a muzzle, wherein the adding amount of water is about 6-8% of the weight of the casting material. Wherein the water reducing agent belongs to a common reagent material in the field and can be obtained from a commercial way. The water reducing agent is preferably sodium tripolyphosphate.
The solid pore-forming agent is combusted and volatilized at high temperature to leave pores, so that the volume density and the heat conductivity of the castable can be remarkably reduced, and the heat loss of the preheater is reduced. The carbon black is used as the pore-forming agent, the left pores are smaller, the thermal conductivity of the obtained finished product is lower, the polystyrene spheres are used as the pore-forming agent, the left pores are larger, the thermal conductivity of the obtained finished product is relatively higher, and the polystyrene spheres and the carbon black can be simultaneously used as the pore-forming agent.
The addition of the retarder can uniformly disperse the injection material at the nozzle on one hand, and the injection material does not solidify and flows well before exiting the nozzle on the other hand. The retarder is one or two of the following substances: citric acid, tartaric acid, oxalic acid and maleic acid.
The function of adding the composite alkali-resistant powder is to enhance the alkali resistance of the castable after injection molding. The composite alkali-resistant powder comprises the following components in percentage by weight: 10-20% of silicon carbide, 10-20% of zircon sand and 60-80% of fused magnesia.
The invention has the beneficial effects that: by improving the components of the castable in the prior art, flint clay and microporous mullite particles are used as aggregate of the castable, powder materials such as plate-shaped corundum powder, alumina micropowder, silica micropowder, magnesia-alumina spinel and perovskite are added, the using amount of pure calcium aluminate cement is controlled, the obtained low-aluminum low-heat-conductivity alkali-resistant castable has lower aluminum content and lower heat conductivity than common castable, and on the other hand, a solid pore-forming agent is added, so that the volume density and the heat conductivity of the obtained castable can be remarkably reduced, the heat loss of a preheater is reduced, and in addition, the composite alkali-resistant powder is added, the corrosion of cement clinker atmosphere generated by different raw materials can be resisted, and alkali cracking is not easily generated.
Detailed Description
The invention is described in detail with reference to the following specific examples, which are only for illustrating the invention and are not intended to limit the invention, and the specific raw materials involved in the invention are commercially available:
the first embodiment is as follows:
55kg of flint clay; 12kg of plate-shaped corundum powder; 5kg of alumina micro powder; 5kg of composite alkali-resistant powder; 6kg of silicon dioxide micro powder; 4kg of microporous mullite; 5kg of magnesium aluminate spinel; 1kg of perovskite; 2kg of solid pore-forming agent; 4.7kg of pure calcium aluminate cement; 0.25kg of water reducing agent; 0.05kg of retarder is fully and uniformly stirred in stirring equipment to obtain a finished product, when in use, a proper amount of silica sol and water are added, the mixture is stirred until the mixture is uniformly mixed to obtain a mixed material, and the mixed material is poured, vibrated, demoulded, maintained and baked to form the required integral refractory material lining body.
Wherein, the raw materials meet the following indexes: the particle size of the flint clay is 1-7 meshes, and the particle size of the plate-shaped corundum powder is 325 meshes; the granularity of the alumina micro powder is less than 1 mu m; the granularity of the composite alkali-resistant powder is 200 meshes; the silicon dioxide micro powder is less than or equal to 0.5 mu m; the granularity of the microporous mullite is less than 3 mm; the particle size of the magnesium aluminate spinel is less than 3 mm; the perovskite particle size is less than 3 mm; the solid pore-forming agent is 80-120 meshes; the pure specific surface area of the calcium aluminate cement is 5500 g/cm.
Wherein 2kg of the solid pore-forming agent is carbon black.
Wherein 0.25kg of water reducing agent is totally sodium tripolyphosphate.
Wherein 0.05kg of retarder is 0.02kg of citric acid and 0.03kg of tartaric acid.
Wherein, in 5kg of the composite alkali-resistant powder, 0.5kg of silicon carbide, 0.5kg of zircon sand and 4kg of fused magnesia are added.
Example two:
60kg of flint clay; 11kg of plate-shaped corundum powder; 4kg of alumina micro powder; 4kg of composite alkali-resistant powder; 5kg of silicon dioxide micro powder; 3kg of microporous mullite; 4kg of magnesium aluminate spinel; 1.5kg of perovskite; 1.5kg of solid pore-forming agent; 5.5kg of pure calcium aluminate cement; 0.4kg of water reducing agent; 0.1kg of retarder is fully and uniformly stirred in stirring equipment to obtain a finished product, when in use, a proper amount of silica sol and water are added, the mixture is stirred until the mixture is uniformly mixed to obtain a mixed material, and the mixed material is poured, vibrated, demoulded, maintained and baked to form the required integral refractory material lining body.
Wherein, the raw materials meet the following indexes: the particle size of the flint clay is 1-7 meshes, and the particle size of the plate-shaped corundum powder is 325 meshes; the granularity of the alumina micro powder is less than 1 mu m; the granularity of the composite alkali-resistant powder is 200 meshes; the silicon dioxide micro powder is less than or equal to 0.5 mu m; the granularity of the microporous mullite is less than 3 mm; the particle size of the magnesium aluminate spinel is less than 3 mm; the perovskite particle size is less than 3 mm; the solid pore-forming agent is 80-120 meshes; the pure specific surface area of the calcium aluminate cement is 5500 g/cm.
Wherein, 1.5kg of solid pore-forming agent is 1.0kg of carbon black, and 0.5kg of polystyrene pellets.
Wherein 0.4kg of water reducing agent is totally sodium tripolyphosphate.
Wherein, 0.1kg of retarder is 0.06kg of oxalic acid and 0.04kg of maleic acid.
Wherein, in 4kg of the composite alkali-resistant powder, 0.8kg of silicon carbide, 0.8kg of zircon sand and 2.4kg of fused magnesia are added.
Example three:
58kg of flint clay; 10kg of plate-shaped corundum powder; 4kg of alumina micro powder; 6kg of composite alkali-resistant powder; 4kg of silicon dioxide micro powder; 5kg of microporous mullite; 4kg of magnesium aluminate spinel; 1.8kg of perovskite; 3kg of solid pore-forming agent; 4kg of pure calcium aluminate cement; 0.18kg of water reducing agent; 0.02kg of retarder is fully and uniformly stirred in stirring equipment to obtain a finished product, when in use, a proper amount of silica sol and water are added, the mixture is stirred until the mixture is uniformly mixed to obtain a mixed material, and the mixed material is poured, vibrated, demoulded, maintained and baked to form the required integral refractory material lining body.
Wherein, the raw materials meet the following indexes: the particle size of the flint clay is 1-7 meshes, and the particle size of the plate-shaped corundum powder is 325 meshes; the granularity of the alumina micro powder is less than 1 mu m; the granularity of the composite alkali-resistant powder is 200 meshes; the silicon dioxide micro powder is less than or equal to 0.5 mu m; the granularity of the microporous mullite is less than 3 mm; the particle size of the magnesium aluminate spinel is less than 3 mm; the perovskite particle size is less than 3 mm; the solid pore-forming agent is 80-120 meshes; the pure specific surface area of the calcium aluminate cement is 5500 g/cm.
Wherein, 3kg of solid pore-forming agent is 1.5kg of carbon black, and 1.5kg of polystyrene pellets.
Wherein 0.18kg of water reducing agent is totally sodium tripolyphosphate.
Wherein the retarder 0.02 is citric acid.
Wherein, in 6kg of the composite alkali-resistant powder, 1.2kg of silicon carbide, 0.6kg of zircon sand and 4.2kg of fused magnesia are added.
The low-aluminum low-heat-conductivity alkali-resistant castable obtained in the embodiments 1 to 3 is shown in table 1:
table 1 performance test data of the low-aluminum, low-thermal conductivity, alkali-resistant castable in each example:
Figure DEST_PATH_IMAGE002

Claims (5)

1. the low-aluminum low-heat-conductivity alkali-resistant castable is characterized by comprising the following components in percentage by weight: 55-60% of flint clay, 10-15% of tabular corundum powder, 4-8% of alumina micropowder, 4-6% of composite alkali-resistant powder, 4-8% of silica micropowder, 3-6% of microporous mullite, 4-6% of magnesium aluminate spinel,1-2% of perovskite, 1-3% of solid pore-forming agent, 4-8% of pure calcium aluminate cement, 0.1-0.5% of water reducing agent and 0.01-0.1% of retarder; the raw materials meet the following indexes: the particle size of the flint clay is 1-7 meshes, the particle size of the plate-shaped corundum powder is 325 meshes, the particle size of the alumina micro powder is less than 1 mu m, the particle size of the composite alkali-resistant powder is 200 meshes, the particle size of the silica micro powder is less than or equal to 0.5 mu m, the particle size of the microporous mullite is less than 3mm, the particle size of the magnesia-alumina spinel is less than 3mm, the particle size of the perovskite is less than 3mm, the particle size of the solid pore-forming agent is 80-120 meshes, and the pure specific surface2。
2. The low-aluminum low-thermal-conductivity alkali-resistant castable as claimed in claim 1, wherein the solid pore former is one or two of the following materials: polystyrene spheres, carbon black.
3. The low-aluminum low-heat-conductivity alkali-resistant castable as claimed in claim 1, wherein the water reducing agent is sodium tripolyphosphate.
4. The low-aluminum low-thermal-conductivity alkali-resistant castable according to claim 1, wherein the retarder is one or two of the following substances: citric acid, tartaric acid, oxalic acid and maleic acid.
5. The low-aluminum low-thermal-conductivity alkali-resistant castable material as claimed in claim 1, wherein the composite alkali-resistant powder comprises, by weight: 10-20% of silicon carbide, 10-20% of zircon sand and 60-80% of fused magnesia.
CN201710170995.XA 2017-03-21 2017-03-21 Low-aluminum low-heat-conduction alkali-resistant castable Active CN106830958B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710170995.XA CN106830958B (en) 2017-03-21 2017-03-21 Low-aluminum low-heat-conduction alkali-resistant castable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710170995.XA CN106830958B (en) 2017-03-21 2017-03-21 Low-aluminum low-heat-conduction alkali-resistant castable

Publications (2)

Publication Number Publication Date
CN106830958A CN106830958A (en) 2017-06-13
CN106830958B true CN106830958B (en) 2020-04-17

Family

ID=59130816

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710170995.XA Active CN106830958B (en) 2017-03-21 2017-03-21 Low-aluminum low-heat-conduction alkali-resistant castable

Country Status (1)

Country Link
CN (1) CN106830958B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11542200B2 (en) * 2018-07-06 2023-01-03 Basf Se Composition for flowable fire-resistant materials
CN109305821A (en) * 2018-12-20 2019-02-05 无锡远能耐火材料有限公司 The anticorrosive castable of low aluminium
CN111153708B (en) * 2020-02-14 2022-07-08 辽宁科技大学 Corundum-mullite multiphase gradient material for heat recovery coke oven door
CN114988893A (en) * 2022-05-27 2022-09-02 襄阳聚力新材料科技有限公司 Ladle refractory castable
CN115745579B (en) * 2023-01-02 2023-09-22 洛阳科创新材料股份有限公司 Composite air brick with high strength and low heat conductivity coefficient and preparation method thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1159083A1 (en) * 1999-02-09 2001-12-05 Harbison-Walker Refractories Company Method of applying a non-slumping, pumpable castable high purity silica composition
CN101445379A (en) * 2008-12-19 2009-06-03 周建国 Dedicated pouring material for cement kiln outlet and jetting coal pipe and preparation method thereof
CN101891485A (en) * 2009-05-21 2010-11-24 宝山钢铁股份有限公司 Pouring material for steel ladle
CN102093064A (en) * 2010-12-21 2011-06-15 北京联合荣大工程材料有限责任公司 Refractory spray coating with high steel fiber content and spraying method thereof
CN102976771A (en) * 2012-11-16 2013-03-20 宜兴天霸非金属材料有限公司 High temperature resistant lightweight heat insulation castables
CN103058686A (en) * 2013-01-25 2013-04-24 苏州罗卡节能科技有限公司 Medium-density alkali-resistant casting material
CN103214253A (en) * 2013-04-27 2013-07-24 阳泉金隅通达高温材料有限公司 High-strength and anti-stripping type homogenous composite castable and preparation method
CN104418597A (en) * 2013-08-21 2015-03-18 上海宝钢工业技术服务有限公司 Castable used for RH refining furnace lining and construction method thereof
CN105237018A (en) * 2015-11-19 2016-01-13 长兴兴鹰新型耐火建材有限公司 Abrasion-resistant anti-erosion pouring material for cement kiln tertiary air duct

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1159083A1 (en) * 1999-02-09 2001-12-05 Harbison-Walker Refractories Company Method of applying a non-slumping, pumpable castable high purity silica composition
CN101445379A (en) * 2008-12-19 2009-06-03 周建国 Dedicated pouring material for cement kiln outlet and jetting coal pipe and preparation method thereof
CN101891485A (en) * 2009-05-21 2010-11-24 宝山钢铁股份有限公司 Pouring material for steel ladle
CN102093064A (en) * 2010-12-21 2011-06-15 北京联合荣大工程材料有限责任公司 Refractory spray coating with high steel fiber content and spraying method thereof
CN102976771A (en) * 2012-11-16 2013-03-20 宜兴天霸非金属材料有限公司 High temperature resistant lightweight heat insulation castables
CN103058686A (en) * 2013-01-25 2013-04-24 苏州罗卡节能科技有限公司 Medium-density alkali-resistant casting material
CN103214253A (en) * 2013-04-27 2013-07-24 阳泉金隅通达高温材料有限公司 High-strength and anti-stripping type homogenous composite castable and preparation method
CN104418597A (en) * 2013-08-21 2015-03-18 上海宝钢工业技术服务有限公司 Castable used for RH refining furnace lining and construction method thereof
CN105237018A (en) * 2015-11-19 2016-01-13 长兴兴鹰新型耐火建材有限公司 Abrasion-resistant anti-erosion pouring material for cement kiln tertiary air duct

Also Published As

Publication number Publication date
CN106830958A (en) 2017-06-13

Similar Documents

Publication Publication Date Title
CN106830958B (en) Low-aluminum low-heat-conduction alkali-resistant castable
CN100436376C (en) Ceramic Al203SiC refractory and preparation method thereof
CN107032810B (en) Gunning mix with excellent bonding performance for sintering large flue and preparation method
CN101805198B (en) Mullite steel fiber castable
CN108610063A (en) High-performance mullite thermal insulation fire-resistant pouring material
CN108046784A (en) A kind of high alumina refractory casting material and preparation method thereof
CN109734462B (en) Aluminum dihydrogen phosphate combined steel fiber reinforced refractory castable and preparation method thereof
CN103787681B (en) Tundish diffuse type air brick and preparation method thereof
CN105254319B (en) A kind of castable of feeding chamber preformed bricks and preparation method thereof
CN110498673A (en) A kind of mullite crystal whisker enhancing alumina hollow ball porous ceramics preparation method
CN108947547B (en) High-temperature-resistant ladle safety lining castable
CN106830953A (en) A kind of high-strength alkali-resistant refractory jetting material of wet method
CN106631068A (en) Bauxite-based homogenous corundum environment-friendly steel ladle base brick and preparation method
CN103819203A (en) Mullite high-strength refractory castable
CN108083782A (en) Ladle integral pouring working lining castable
CN111718199A (en) Refractory heat-insulating ladle castable
CN110668828B (en) Magnesium binder for cement-free castable and preparation method thereof
CN106518043A (en) Preparing method of low-cost Al-Ca-Si tin bath bottom block
CN106699205B (en) Sol-combined blast furnace lining wet-process spray coating and preparation method thereof
CN113307613B (en) Ladle cover castable and preparation method thereof
JP2012031006A (en) Fire-resistant heat-insulating brick, and method of manufacturing the same
CN113185271A (en) Pipeline wear-resistant castable and preparation method thereof
CN109095902B (en) A kind of glass furnace paving brick and its production technology
CN110452009A (en) A kind of preparation method of in-situ preparation magnesium aluminate spinel whisker skeletal porous ceramics
CN114573324A (en) RH vacuum furnace lining refractory material and preparation method thereof

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