CN110006258A - A kind of refractory lining and burner anti-thermal shock protective layer of rotary kiln - Google Patents

A kind of refractory lining and burner anti-thermal shock protective layer of rotary kiln Download PDF

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Publication number
CN110006258A
CN110006258A CN201910366188.4A CN201910366188A CN110006258A CN 110006258 A CN110006258 A CN 110006258A CN 201910366188 A CN201910366188 A CN 201910366188A CN 110006258 A CN110006258 A CN 110006258A
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CN
China
Prior art keywords
rotary kiln
high temperature
refractory lining
protective layer
felt
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Pending
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CN201910366188.4A
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Chinese (zh)
Inventor
刘礼龙
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TIANJIN NANJI STAR INSULATING MATERIAL CO Ltd
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TIANJIN NANJI STAR INSULATING MATERIAL CO Ltd
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Priority to CN201910366188.4A priority Critical patent/CN110006258A/en
Publication of CN110006258A publication Critical patent/CN110006258A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/002—Inorganic yarns or filaments
    • 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
    • F27D1/10—Monolithic linings; Supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/105—Ceramic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • 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
    • C04B2235/34—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
    • 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
    • C04B2235/44—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
    • C04B2235/02—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
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • 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
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/522—Oxidic
    • C04B2235/5232—Silica or silicates other than aluminosilicates, e.g. quartz

Abstract

The present invention relates to a kind of refractory lining of rotary kiln and burner anti-thermal shock protective layers; with the heat-insulation blanket felt plate of anti-thermal shock antiscour anti-strip resistant to high temperature; hygrometric state felted is made using special bonding agent; then it uses and the matched special-purpose fire-resistant clay of rotary kiln refractory lining; paste the surface of rotary kiln refractory lining; after clay and hygrometric state felt dry solidification, it is formed the insulating layer structure of anti-thermal shock anti-strip on the surface of rotary kiln refractory lining, solves the problems, such as that rotary kiln refractory material thermal shock cracking falls off.Using the protective layer of anti-thermal shock antiscour anti-strip refractory lining of the invention; used in the hot end castable surface of rotary kiln coal powder injection pipe; one perimeter surface of coal injection pipe hot end is pasted into refractory mortar; the protective layer of anti-thermal shock antiscour anti-strip can be formed after drying, significantly extend the service life of coal injection pipe.

Description

A kind of refractory lining and burner anti-thermal shock protective layer of rotary kiln
Technical field
The invention belongs to fire-resistant heat insulating material fields, are related to the refractory lining and burner of rotary kiln, especially a kind of refractory lining And the anti-thermal shock antiscour anti-strip protective layer of burner.
Background technique
In the industrial production, all it is to realize the sintering purpose of material by rotary kiln there are many technical process, is turning round In the normal production of kiln, due to the variation of material and the fluctuation of fuel, the flame temperature of firing is caused to be widely varied, it is easy to Reduce the refractory material in face of flame by its fire resistance due to violent temperature change (being commonly called as thermal shock).Because temperature Big ups and downs, so that generating huge interior extruding force due to huge thermal expansion effects inside refractory material and (being commonly called as in high temperature Stress), this huge internal stress can destroy the integral strength of refractory material, and cause refractory material internal tiny crack occur, The a large amount of accumulative crack for forming macroscopic view of crackle, causes refractory material intensity to be scattered and disappeared, loses due fire resisting and heat-proof quality.
The thermal shock resistance of refractory material is to be exposed to refractory material in 1000 DEG C of hot environments, is put into immediately after Primary in normal temperature air or water, refractory material not cracking destruction due to such thermal shock referred to as has a thermal shock resistance.It is existing The rotary kiln overwhelming majority be using refractory brick, it is a small amount of to use castable refractory or castable refractory prefabricated section, it is this The density of refractory material is all in 2.0~3.0g/cm3Between, general anti-thermal shock cracking destruction ability is 10~15 times.It is more than For this number refractory lining due to excessive thermal shock stress, the refractory material internal structure in face of high temperature face just will appear micro-crack, As the accumulative micro-crack of time is accumulated into big crackle, causes refractory surface to form very big loose and cracking, scatter and disappear resistance to The elevated temperature strength of fiery material forms the damages such as serious peeling and cracking.
The castable refractory in the hot end of the coal injection pipe in rotary kiln is exposed to 1000~1700 DEG C of gas of thermal-flame formation In atmosphere, when rotary kiln needs are rapidly heated or cool down, the firing rate of coal injection pipe just needs quickly to adjust, and head works as a result, Therein is exactly that the hot end castable of coal injection pipe needs to be subjected to violent temperature fluctuation, the heat that such severe temperature fluctuations are formed Shake, leads to coal injection pipe castable cracking damage (being commonly called as quick-fried head) quickly, the castable of damage just loses to the gold in coal injection pipe Belong to nozzle guard, metallic nozzle high temperature is easy to produce deformation, and the metallic nozzle of deformation will lead to the deformation of flame, the fire of deformation Flame is just difficult to meet normal flame profile and temperature, and the flame of deformation is also possible to burn refractory lining (the custom lining of rotary kiln wall Lick kiln lining), lead to local refractory damage, it is serious to need to stop kiln replacement refractory material (being commonly called as digging), it causes huge Economic loss.
By retrieval, it is not yet found that doing the open article or patent of corresponding Protective strategy to rotary kiln refractory lining and burner Report.
Summary of the invention
It is an object of the invention to overcome the existing insufficient defect of rotary kiln refractory material thermal shock resistance, provide a kind of resistance to The anti-thermal shock antiscour anti-strip protective layer of fire lining and burner, the protective layer are attached to the surface of rotary kiln refractory lining, are mentioned with reaching The purpose of the thermal shock resistance of high refractory lining.
It is well known that the high temperature fiber of more stomatas has fabulous thermal shock resistance, reason is single fiber expanded by heating When, fibrous external space can will not form huge swelling stress with free extension as compact refractory material, thus, it is micro- The thermal shock resistance of hole fiber-like material be it is extraordinary, in the thermal cycle under room temperature to 1000 DEG C of environment, can almost bear Infinitely without destroying and crushing, so, add one layer of fibrous insulating layer on rotary kiln refractory lining surface, forms heat-insulated guarantor Sheath, the thermal shock that can solve firebrick lining crack and flake off problem.
Using same principle, mixed using aglite powder resistant to high temperature and bonding agent resistant to high temperature, using semar technique To the refractory lining surface of rotary kiln, the thermal shock that also can solve firebrick lining cracks and flakes off problem for construction or gunite construction.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of protective layer of anti-thermal shock antiscour anti-strip refractory lining, inside the refractory lining of rotary kiln counter-fire face or return The outer surface of the castable refractory of rotary kiln burner is pasted or one layer of injection or smearing or more thermal insulation layer, forms one layer of heat-insulated buffering Layer, provides the characteristic of high temperature resistant resistance to erosion anti-thermal shock for firebrick lining, and provide a kind of efficient insulating layer structure.
The thermal insulation layer is mixed by long fibre and/or heat-insulated powder with high temperature resistant bonding agent, is long fibre shape three-dimensional network Shape structure, long fibre shape three-dimensional network shape contain bonding agent resistant to high temperature, are formed high-strength three dimensional network by thermal at high temperature Network shape composite material provides high-strength antiscour and efficient thermal insulation layer, to have incomparable excellent thermal shock resistance.
Containing long stapled blanket resistant to high temperature or felt or plate be use high temperature resistant for 1000~1800 DEG C ceramic fiber blanket/ Felt/plate, high silica fiber blanket/felt/plate, aluminium silicate fiber containing zirconia blanket/felt/plate, mullite crystal tapetum fibrosum/felt/plate, aluminium oxide Crystal fibre blanket/felt/plate one or more.Individual fiber diameter be 3~12 microns, single fiber length be 25~ 300 millimeters, which is 80~400Kg/m3, optimum density is 130~300Kg/m3。
Also, it is preferred that, using 1500 DEG C of high temperature resistant of high temperature fiber blanket felt plate, using 1430 DEG C of fibers containing zirconium and 1600 DEG C mullite crystal fiber is mixed according to weight ratio 1:1.Because of 1430 DEG C of long fibre containing zircon ceramic, have extraordinary Tensile strength and airflow scouring resistant to high temperatures；It is short that 1600 DEG C of crystal fibres resistant to high temperature can be made up, the low characteristic of tensile strength, Thus 1500 DEG C of high temperature composite fibre being composed have low cost with high temperature resistant again, also have best antiscour Property.
Moreover, the special high-temperature fibrous thermal blanket/felt/plate is impregnated using high temperature resistant colloidal liquid, the high temperature colloid It is female for the common high temperature adhesives in market, water glass solution, phosphate dihydrogen aluminum solution, silica solution, Aluminum sol, mullite colloid Liquid, alumina gel mother liquor mixture or complex sol (solid content 15~70%) that they mix, with this mixed The dilution of the water of colloidal liquid or this epoxy glue is closed, high temperature fiber blanket felt plate is impregnated, forms special wet felt, the wet felt With a thickness of 5~50 millimeters, optimal with a thickness of 10~25 millimeters, density is 250~600Kg/m after wet felt is dry3。
Also, it is preferred that using silica solution and Aluminum sol (solid is all levels 30%) according to weight ratio 5~40: 60 ~95 are mixed, and the colloid thus mixed has more preferable heat-resisting quantity and caking property, improve the intensity every blanket felt plate.
Moreover, the high temperature clay for pasting wet felt, viscous with acid refractory using the common refractory mortar in market Patch is using acid mating clay, and with basic refractory using the mating clay of alkalinity, this clay is air hardening refractory clay, from Room temperature can provide firm caking property to high-temperature.
Furthermore, it is possible to, using the loose wool of high-temperature fibre, be conveyed using the gas suspension of spraying machine using sprayed construction method The mixing liquid of high temperature resistant colloidal liquid or these colloids is transported to gas containing high-temperature fibre at spray head, then with pump Around the jet pipe for flowing stock, then high temperature colloid is injected in fibrous air-flow at the miniature liquid nozzle from spray head, shape At the rhagiocrin fiber stream of mixing, the refractory lining surface of rotary kiln is sprayed and adhered to, forms one layer of fibrous thermal lining, solidification One layer of heat-barrier coating, 250~600Kg/m of density are formed after drying3。
Furthermore, it is possible to using the heat-insulated powder of heat-resistant light aggregate, for example alumina hollow ball resistant to high temperature, lightweight are not come Stone particles of aggregates, light weight alumina particles of aggregates, heat-insulated powder the inside are fine according to 2~6% addition high temperature resistants of lightweight powder weight Dimension, is mixed into mud with high temperature adhesives or colloid, is applied to refractory lining surface and forms protective layer；Or gunite is used, By heat-insulated powder, high temperature fiber and high temperature resistant bonding agent mixing jetting to the surface of refractory lining, one layer is formed on refractory lining surface Light heat insulation layer, 300~800Kg/m of porous material density which forms3。
The advantages of the present invention:
1, after using heat insulation felt protective layer of the invention, the heating-up time can shorten more than half, the fuel of saving and comprehensive Conjunction expense reaches 50% or more, can put into formal production (reducing the baking time of half) in advance；Heat insulation felt protective layer avoids Destruction of the severe temperature fluctuations of cold kiln heating to refractory lining, the service life of refractory lining are greatly improved.Have When, according to the needs of production, need to stop every year kiln 5 times, then cold kiln firing up starts 5 times, using protective layer of the invention Afterwards, fuel and comprehensive cost that 500,000 yuan or more of cold kiln heating is spent can be saved, the cracking feelings of refractory lining are greatly reduced Condition, to significantly extend the service life of refractory lining.Shorten the time of original firing up half, and increase accordingly revolution The kiln actual production time improves the yield of rotary kiln, and energy conservation and the effect to lower consumption are clearly.
2, heat insulation felt protective layer of the invention is used on coal injection pipe hot end castable surface, thoroughly solves the resistance to of coal injection pipe Too short problem of fiery castable service life, ensure that the stability of coal injection pipe flame, thus brings very big energy-saving aspect Economic benefit.
3, original coal injection pipe hot end castable service life is that just will appear apparent cracking phenomena in 1~2 month, is used Heat insulation felt protective layer of the invention is behind castable surface, and after service life extends to 4~6 months, hot end castable just starts Due to heat insulation felt protective layer scaling loss and crack；It is general to return in order to further extend the service life of coal injection pipe hot end castable Rotary kiln be all be used alternatingly using two sets coal injection pipes, as soon as when the hot end heat insulation felt protective layer scaling loss of coal injection pipe, pull-out kiln Heat insulation felt protective layer material of the invention is re-pasted outside, when the former coal injection pipe castable surface heat insulation felt protective layer in rotary kiln When close to scaling loss, replacement is entered at once, and such application method avoids coal injection pipe often more heat-exchange end castable, also avoids Coal injection pipe because casting is hardening cracked causes flame to deform, and then influences the stabilization of the constant rate of production of kiln lining.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that protective layer is arranged on rotary kiln refractory lining；
(1 be wherein refractory lining, 2 be clay, 3 be protective layer)
Fig. 2 is the structural schematic diagram that protective layer is arranged on rotary kiln coal powder injection pipe.
(4 be wherein burner, 2 be clay, 3 be protective layer)
Specific embodiment
Below with reference to case study on implementation, the present invention is further described, and it is not limited that following case study on implementation, which are illustrative, , it cannot be limited the scope of protection of the present invention with following case study on implementation.
Embodiment 1:
On the intermediate zone refractory brick surface (1400 DEG C of temperature, about 20 meters of length) of rotary kiln, contain zirconium with 25 mm of thickness Fibrous insulation (1430 DEG C of maximum operation (service) temperature), using the complex colloid of silica solution and Aluminum sol to impregnate, (weight ratio is molten for silicon Glue: Aluminum sol=30%: 70%, the concentration of two kinds of glue is all 30% solid content), with high temperature clay, (rotary kiln transition belt is resistance to The dedicated high temperature resistant clay of firebrick) be pasted on rotary kiln clinkering zone refractory brick surface, through natural drying, fibrofelt formed one Layer hard protective layer is adhered to the surface of refractory lining, and the density of this layer protective layer of Fibrous insulation containing zirconium is 450Kg/m3, thermally conductive Coefficient is 0.13W/mK (600 DEG C).
On the clinkering zone refractory brick surface (1600 DEG C of temperature, about 20 meters of length) of revolution, using 30 millimeters, use high temperature resistant 1430 DEG C of fiber containing zirconium and 1600 DEG C of high temperature resistant of mullite crystal fiber are mixed according to 1500 DEG C that weight ratio 1:1 is mixed Condensating fiber felt is pasted on clinkering zone refractory brick (new lining) or clinkering zone refractory brick table using the common alkaline clay of clinkering zone The kliner coating surface that face is retained forms heat-barrier coating.
In rotary kiln firing up, this layer of heat insulation felt protective layer can resist the great variety of flame temperature, without cracking With fall off, when heat insulation felt surface temperature acute variation (room temperature is to 1400~1600 DEG C), due to the heat insulation felt have it is fabulous resistance to Fire and heat-proof quality, the manyfold so that range of temperature for being transmitted to refractory lining surface behind heat insulation felt has just decayed, lead Cause the hot-surface temperature variation of refractory brick more steady, refractory brick there can be heat caused by time enough digestion surface temperature rise to answer Power variation.
Using the rotary kiln refractory lining of this heat insulation felt protective layer, heating curve originally needs to expend 72 hours or more Technological temperature (1400~1600 DEG C or more) could be reached safely, cold kiln firing up needs the fuel and Integrated Cost spent every time With being 200,000 yuan or so, and refractory lining surface is very easy to cracked, thus greatly reduces the use of refractory lining Service life, cylinder of rotary kiln skin temperature can also increase substantially.
When thermal insulation layer is present in the surface of refractory lining, rotary kiln transition belt skin temperature is reduced to 230 by 300~320 DEG C ~250 DEG C, reduce by 70 DEG C of rotary kiln skin temperature；The temperature of rotary kiln firing belt surface is reduced to 210 DEG C by 260 DEG C, reduces 50 DEG C of skin temperature, energy-saving effect is clearly.
The heat insulation felt protective layer is pasted on the refractory brick surface of rotary kiln, when clinkering zone in rotary kiln and intermediate zone temperature reach After to normal high temperature (1400~1600 DEG C), starting to put into material, material wears the heat-barrier coating on refractory lining surface, Reach after a certain period of time, the heat insulation felt protective layer on rotary kiln refractory lining surface gradually falls off, and completes making for protection refractory lining Life then needs on exposed refractory lining surface when rotary kiln needs to stop kiln cold kiln starting again and has the surface of kliner coating to glue again One layer of heat insulation felt protective layer of the invention is pasted, to achieve the purpose that protect refractory lining.
When rotary kiln stops kiln inspection comparison, the residual thickness of refractory brick is measured, discovery is using heat-barrier coating protection Refractory brick face crack metamorphic layer is higher than the refractory brick intensity of not heat-barrier coating, and same period wear-thickness is 10~20 millimeters few, It has been obviously prolonged the service life of refractory lining.
Embodiment 2:
Rotary kiln low temperature band refractory brick surface (1200~1250 DEG C of temperature herein), generally about 30 meters of length, with 25 The ceramic fiber blanket (1260 DEG C of maximum operation (service) temperature) that the high temperature colloidal silica sol of mm of thickness impregnated, with acidic high-temperature clay It is pasted on the refractory brick surface of the low temperature band of rotary kiln, by spontaneously drying, tapetum fibrosum forms one layer of hard protective layer and is adhered to The surface of refractory lining, the density of this layer of protective layer are 350Kg/m3, thermal coefficient is 0.12W/mK (600 DEG C).
When rotary kiln refractory lining before this does not have thermal insulation layer protection, every time after cold kiln heating, the surface of refractory brick can all go out Existing 5~10 millimeters of micro-cracks, during overburnt material, this layer of crackle metamorphic layer will soon be worn away；When stopping, kiln measurement is resistance to When firebrick thickness, have thermal insulation layer protect refractory wear thickness than no thermal insulation layer protect it is resistance to afterwards 5~10 millimeters of less wear, Thus service life of the low temperature with refractory lining is extended.
Cylinder of rotary kiln skin temperature is reduced to 150 DEG C by 200 DEG C when thermal insulation layer is present in refractory lining surface, fall It is 50 DEG C, energy-saving effect is obvious.
Embodiment 3:
5000 tons of cement rotary kiln of daily output, after puzzling refractory brick, 4360 millimeters of inside diameter, embodiment 1 and embodiment 2 Sticking construction be after needing rotary kiln middle and lower part half to paste, to need to rotate rotary kiln into 180 degree, then paste other half Firebrick lining surface heat-barrier coating, speed of application is slow.
Using gunite, by fiber and high temperature bond glue mixing jetting to the surface of rotary kiln clinkering zone kliner coating, thickness 25 ~30 millimeters, density is 400~500Kg/m after heat-barrier coating is dry3, such speed of application improves 2 times, saves construction Time reduces by 50~70 DEG C of skin temperature, protects the cracking degree of refractory lining, extend the service life of refractory lining.
Embodiment 4
It is using semar technique, lightweight heat-proof powder alumina hollow ball resistant to high temperature and high temperature adhesives aluminium dihydrogen phosphate is molten Liquid is mixed into muddy, is then manually applied to the position that local abnormal shape is difficult to construct, or use gunite large-area construction Onto complicated surface, the effect same of equivalent fibrous thermal protective layer can achieve, compensate for the part of fibrous thermal protection Abnormal shape is difficult to the characteristics of constructing.
Using lightweight powder, fiber and high temperature adhesives in application, the fiber inside lightweight powder can play enhancing Effect protects the time of refractory lining can be more permanent, is suitably applied revolution so that the antiwear property of heat-barrier coating enhances Intermediate zone and low temperature band the refractory lining surface of kiln.
Embodiment 5
In rotary kiln coal powder injection to the castable refractory surface of (being also burner), using mullite fiber felt and mullite glue Body mother liquor impregnates, and is then pasted on High temperature Refractory Mortar in the length in one meter of coal injection pipe hot end, the thickness of mullite fiber felt It is 25 millimeters, after 4 months, pulls out and observe surface outside rotary kiln, do not see apparent cracking and damage, then, continue After coming into operation 4 months, stop pulling out observation, after protective layer only has a small amount of crackle, rotary kiln to overhaul, spray when kiln maintenance Coal pipe continues to come into operation, and observation is pulled out after 4 months, and sealer locally has bigger contraction damage, relatively Castable originally does not have protective layer situation, and the service life of coal injection pipe extends 4~6 times, coal injection pipe is greatly improved Effective operational efficiency.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art For, under the premise of not departing from inventive concept, various modifications and improvements can be made, these belong to protection of the invention Range.

Claims (10)

1. the refractory lining and burner anti-thermal shock protective layer of a kind of rotary kiln, it is characterised in that: met inside the refractory lining of rotary kiln The outer surface of the castable refractory of fiery face or rotary kiln burner is pasted or one layer of injection or smearing or more thermal insulation layer, the thermal insulation layer It is mixed by long fibre and/or heat-insulated powder with high temperature resistant bonding agent.
2. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 1, it is characterised in that: the length The single diameter of fiber is 3~12 microns, and joint length is 25~300 millimeters.
3. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 1 or 2, it is characterised in that: described The manufacturing method of thermal insulation layer be: will be impregnated in high temperature resistant bonding agent containing long stapled blanket resistant to high temperature or felt or plate, shape At wet felt or felt or plate, wherein the density containing long stapled blanket resistant to high temperature or felt or plate is 80~400Kg/m3, wet felt or Felt or plate thickness control are 5~50 millimeters, and wet felt or felt or the dry rear density domination of plate are 250~600Kg/m3。
4. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 3, it is characterised in that: containing long fine The blanket or felt or plate resistant to high temperature of dimension are to use high temperature resistant for 1000~1800 DEG C of ceramic fiber blanket/felt/plate, high silica fiber Blanket/felt/plate, aluminium silicate fiber containing zirconia blanket/felt/plate, mullite crystal tapetum fibrosum/felt/plate, alpha-alumina crystals tapetum fibrosum/felt/plate One or more.
5. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 4, it is characterised in that: described contains There are long stapled blanket resistant to high temperature or felt or plate, using 1430 DEG C of high temperature resistant of fibers containing zirconium and 1600 DEG C of high temperature resistant of mullite Crystal fibre is mixed according to weight ratio 1:1.
6. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 3, it is characterised in that: described is resistance to High temperature adhesives are water glass solution, phosphate dihydrogen aluminum solution, silica solution, Aluminum sol, mullite colloid mother liquor, alumina gel One or more kinds of mixtures of mother liquor, solid content 15~70%.
7. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 6, it is characterised in that: described is resistance to High temperature adhesives are mixed using silica solution, the Aluminum sol that solid content is 30% according to weight ratio 5~40: 60~95.
8. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 1, it is characterised in that: described is viscous Patch is pasted using High temperature Refractory Mortar.
9. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 1 or 2, it is characterised in that: described The manufacturing method of thermal insulation layer be gunite, spray head will be transported to containing long stapled loose wool using the gas suspension of spraying machine Place, then high temperature resistant bonding agent is transported at the nozzle around spray head with pump, high temperature resistant bonding agent is injected to containing length from nozzle In the air-flow of fiber, the rhagiocrin fiber stream of mixing is formed, directly sprays and adhere to the refractory lining surface of rotary kiln, is solidified One layer of heat-barrier coating, 250~600Kg/m of density are formed after drying3。
10. the refractory lining and burner anti-thermal shock protective layer of rotary kiln according to claim 1 or 2, it is characterised in that: described The manufacturing method of thermal insulation layer be: heat-insulated powder, high temperature resistance and long fiber and high temperature resistant bonding agent are mixed into muddy, high temperature resistant Long stapled weight is the 2~6% of heat-insulated powder weight, is applied to refractory lining surface and forms protective layer；Or gunite is used, By heat-insulated powder, high temperature resistance and long fiber and high temperature resistant bonding agent mixing jetting to the surface of refractory lining, protective layer is formed, this is heat-insulated 300~800Kg/m of protective layer material density that powder is formed3, the heat-insulated powder is for alumina hollow ball resistant to high temperature or gently One or more kinds of mixtures of matter mullite aggregate particle or light weight alumina particles of aggregates.
CN201910366188.4A 2019-05-05 2019-05-05 A kind of refractory lining and burner anti-thermal shock protective layer of rotary kiln Pending CN110006258A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111592366A (en) * 2020-04-28 2020-08-28 河南九环实业发展有限公司 Environment-friendly multi-element nano wear-resistant corrosion-resistant vitrified lining material
CN112592168A (en) * 2021-02-08 2021-04-02 淄博雨程节能环保科技有限公司 Plastic ceramic fiber product
CN112723867A (en) * 2021-02-08 2021-04-30 淄博雨程节能环保科技有限公司 Plastic ceramic fiber product
CN114593608A (en) * 2022-01-20 2022-06-07 华润水泥(鹤庆)有限公司 Novel rotary kiln coal injection pipe construction method
CN116239392A (en) * 2023-03-24 2023-06-09 长兴兴鹰新型耐火建材有限公司 Castable for rotary kiln grate cooler

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668590A (en) * 1981-09-30 1987-05-26 Isolite Babcock Refractories Co., Ltd. Ceramic fiber moldings
CN1458126A (en) * 2003-04-23 2003-11-26 北京嘉邦环保工程技术有限责任公司 compact ceramic fiber spraying lining and its working process
CN101328073A (en) * 2008-07-22 2008-12-24 马鞍山市金马炉业有限责任公司 Self-reinforcing type ceramic fibre pouring material and preparation thereof
CN102093062A (en) * 2010-12-09 2011-06-15 上海伊索热能技术有限公司 Fireproof heat insulation wet felt and production process thereof
CN102424595A (en) * 2011-09-19 2012-04-25 南京理工大学常熟研究院有限公司 Preparation method of hard erosion resistant alumina fiberboard hearth material
CN102503465A (en) * 2011-10-25 2012-06-20 浙江锦诚耐火材料有限公司 Light thermal insulation sprayed material
CN104086201A (en) * 2014-07-22 2014-10-08 南京理工宇龙新材料科技有限公司 High-purity alumina fiber and preparation method thereof
CN206321058U (en) * 2016-11-16 2017-07-11 上海伊索热能技术股份有限公司 A kind of high-temperature heat insulation fiber module firebreak

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668590A (en) * 1981-09-30 1987-05-26 Isolite Babcock Refractories Co., Ltd. Ceramic fiber moldings
CN1458126A (en) * 2003-04-23 2003-11-26 北京嘉邦环保工程技术有限责任公司 compact ceramic fiber spraying lining and its working process
CN101328073A (en) * 2008-07-22 2008-12-24 马鞍山市金马炉业有限责任公司 Self-reinforcing type ceramic fibre pouring material and preparation thereof
CN102093062A (en) * 2010-12-09 2011-06-15 上海伊索热能技术有限公司 Fireproof heat insulation wet felt and production process thereof
CN102424595A (en) * 2011-09-19 2012-04-25 南京理工大学常熟研究院有限公司 Preparation method of hard erosion resistant alumina fiberboard hearth material
CN102503465A (en) * 2011-10-25 2012-06-20 浙江锦诚耐火材料有限公司 Light thermal insulation sprayed material
CN104086201A (en) * 2014-07-22 2014-10-08 南京理工宇龙新材料科技有限公司 High-purity alumina fiber and preparation method thereof
CN206321058U (en) * 2016-11-16 2017-07-11 上海伊索热能技术股份有限公司 A kind of high-temperature heat insulation fiber module firebreak

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
严掌贵 等: "莫来石纤维制品用在钢包盖和罩式炉上节能效果", 《全国能源与热工2004学术年会》 *
古练祥 等: "《耐火纤维》", 31 December 1982, 冶金工业出版社 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111592366A (en) * 2020-04-28 2020-08-28 河南九环实业发展有限公司 Environment-friendly multi-element nano wear-resistant corrosion-resistant vitrified lining material
CN112592168A (en) * 2021-02-08 2021-04-02 淄博雨程节能环保科技有限公司 Plastic ceramic fiber product
CN112723867A (en) * 2021-02-08 2021-04-30 淄博雨程节能环保科技有限公司 Plastic ceramic fiber product
CN114593608A (en) * 2022-01-20 2022-06-07 华润水泥(鹤庆)有限公司 Novel rotary kiln coal injection pipe construction method
CN116239392A (en) * 2023-03-24 2023-06-09 长兴兴鹰新型耐火建材有限公司 Castable for rotary kiln grate cooler
CN116239392B (en) * 2023-03-24 2024-01-09 长兴兴鹰新型耐火建材有限公司 Castable for rotary kiln grate cooler

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Application publication date: 20190712