CN106242598B - Inner liner of rotary kiln brick, liner composite brick and its manufacturing method - Google Patents

Inner liner of rotary kiln brick, liner composite brick and its manufacturing method Download PDF

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Publication number
CN106242598B
CN106242598B CN201610638357.1A CN201610638357A CN106242598B CN 106242598 B CN106242598 B CN 106242598B CN 201610638357 A CN201610638357 A CN 201610638357A CN 106242598 B CN106242598 B CN 106242598B
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rotary kiln
inner liner
brick
layer
liner
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CN106242598A (en
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李兴
程国建
杜春天
谭春凡
甘乐才
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Chongqing Iron And Steel Group Mining Co Ltd Metallurgical Material Factory
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Chongqing Iron And Steel Group Mining Co Ltd Metallurgical Material Factory
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—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
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/135—Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1352—Fuel ashes, e.g. fly ash
    • 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
    • C04B35/16—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 silicates other than clay
    • C04B35/18—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 silicates other than clay rich in aluminium oxide
    • C04B35/185—Mullite 3Al2O3-2SiO2
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/28—Arrangements of linings
    • 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
    • C04B2235/349—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
    • C04B2235/70—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
    • C04B2235/9623—Ceramic setters properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a kind of inner liner of rotary kiln brick, liner composite brick and its manufacturing method, inner liner of rotary kiln brick includes: 25% bauxite, 58% M45 mullite and 17% clay by mass percentage；The manufacturing method of inner liner of rotary kiln brick, comprising the following steps: 1) will be ground altogether after bauxite, clay mixing, 2) powder after total mill is sent into Wet wheel roller mixed grind etc. with M45 mullite；Inner liner of rotary kiln composite brick, the light layer including heavy layer and above heavy layer；The manufacturing method of inner liner of rotary kiln composite brick, comprising the following steps: 1) heavy layer material and lightweight layer material are respectively fed to Wet wheel roller mixed grind etc..The liner tile alkaline erosion performance of its acquisition of the present invention is good, and thermal shock resistance and wearability also have larger improvement, and life of product is significantly improved；And kiln shell temperature can be effectively reduced in liner tile obtained, reduce heat loss, reduce rotary kiln energy consumption, while can also mitigate inner liner of rotary kiln weight, be conducive to rotary kiln running.

Description

Inner liner of rotary kiln brick, liner composite brick and its manufacturing method
Technical field
The present invention relates to rotary kiln technology, in particular to the inner lining material and its manufacturing method of a kind of rotary kiln.
Background technique
Large-sized rotary kiln applies to industry because of the advantages that its yield is big, production is stablized, product calcining is uniform more and morely In production, in addition to cement industry, active lime calcining, chromic salts roast, alkali-lime sinter process production aluminium oxide etc. are all using large size Rotary kiln.
Inner liner of rotary kiln refractory material selects high-alumina brick mostly, in use due to by K2O、Na2O, the alkalinity such as CaO Substance corrodes, and it is loose to will lead to brick body expansion；The defects of along with there are thermal shock resistances poor, the easy peeling abrasion of common high-alumina brick, So that existing inner liner of rotary kiln clinkering zone service life is mostly at 6-8 months, and brick body liner is not available heat insulation layer, leads Cause kiln shell temperature higher, heat loss is larger.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of inner liner of rotary kiln brick, liner composite brick and its manufacturing method, with Existing large-sized rotary kiln high alumina brick lining is solved in use because alkali corrodes, thermal shock peeling causes service life short and kiln The problem that shell temperature is high, heat loss is big.
Inner liner of rotary kiln brick of the present invention, include: by mass percentage 25% bauxite, 58% M45 mullite, with And 17% clay.
The invention also discloses a kind of manufacturing methods of inner liner of rotary kiln brick, comprising the following steps:
1) it is ground altogether in flour mill after mixing bauxite and clay；
2) Wet wheel roller mixed grind will be added through powder made from flour mill and M45 mullite；
3) 630t press will be sent into through mixture made from Wet wheel roller mixed grind to suppress, inner liner of rotary kiln brick is made Base；
4) adobe is put into tunnel oven, 8h is fired at 1410 DEG C, inner liner of rotary kiln brick is made.In inner liner of rotary kiln brick It by mass percentage include: 25% bauxite, 58% M45 mullite and 17% clay.
The invention also discloses a kind of inner liner of rotary kiln composite bricks, the lightweight including heavy layer and above heavy layer Layer, the heavy layer include: bauxite 25%, M45 mullite 58% and clay 17% by mass percentage, described light Matter layer includes: floating bead 20%, light-weight mullite 60% and clay 20% by mass percentage.
Further, the faying face of the heavy layer and light layer is zigzag.
The invention also discloses a kind of manufacturing methods of inner liner of rotary kiln composite brick, comprising the following steps:
1) heavy layer material and lightweight layer material are respectively fed to Wet wheel roller mixed grind；
2) the resulting heavy layer material of mixed grind and lightweight layer material are sequentially placed into compacting tool set by specified amount, in 630T The lower compacting of press effect obtains adobe；
3) adobe is put into kiln, 8h is fired at 1410 DEG C, inner liner of rotary kiln composite brick is made.
Beneficial effects of the present invention:
Inner liner of rotary kiln brick, liner composite brick and its manufacturing method of the present invention, the liner tile alkaline erosion performance obtained It is substantially better than the high-alumina brick that current rotary kiln uses, thermal shock resistance and wearability also have larger improvement, and life of product has bright It is aobvious to improve；And kiln shell temperature can be effectively reduced in liner composite brick obtained, reduce heat loss, reduce rotary kiln energy consumption, simultaneously Inner liner of rotary kiln weight can also be mitigated, be conducive to rotary kiln running.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of inner liner of rotary kiln composite brick；
Fig. 2 is the schematic cross-sectional view in Fig. 1 along A-A.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment one: the present embodiment inner liner of rotary kiln brick, include: by mass percentage 25% bauxite, 58% M45 mullite and 17% clay.
In the present embodiment, contain 54.8% Al by mass percentage, in the bauxite in heavy layer2O3And 2.46% Fe2O3；Contain 45.4% Al in M45 mullite in heavy layer2O3And 1.03% Fe2O3；In clay in heavy layer Containing 28.3% Al2O3And 1.43% Fe2O3。
Embodiment two: the manufacturing method of inner liner of rotary kiln brick in embodiment one, comprising the following steps:
1) it is ground altogether in flour mill after mixing bauxite and clay；
2) Wet wheel roller mixed grind will be added through powder made from flour mill and M45 mullite；
3) 630t press will be sent into through mixture made from Wet wheel roller mixed grind to suppress, inner liner of rotary kiln brick is made Base；
4) adobe is put into tunnel oven, 8h is fired at 1410 DEG C, inner liner of rotary kiln brick is made；In inner liner of rotary kiln brick It by mass percentage include: 25% bauxite, 58% M45 mullite and 17% clay.
Following table is the physical and chemical parameter using inner liner of rotary kiln brick made from manufacturing method in embodiment two:
The liner tile obtained in LZ-75 high-alumina brick, common brick and the embodiment two used on selection rotary kiln is done resistance to Alkali comparative experiments, Na2S does alkaline etching agent, makees alkali resistance measurement using molten alkali crucible method, drills through φ 22mm respectively on three kinds of products A certain amount of Na is added in the hole of × 25mm in hole2S, and 50mm × 50mm × 6mm lid is covered above, at the uniform velocity it is warming up to 1100 DEG C, 5h is kept the temperature, evaluates its alkaline resistance properties, experimental result such as following table after natural cooling.
Embodiment three: the present embodiment inner liner of rotary kiln composite brick, the light layer including heavy layer 1 and above heavy layer 2, the heavy layer includes: bauxite 25%, M45 mullite 58% and clay 17%, the lightweight by mass percentage Layer includes: floating bead 20%, light-weight mullite 60% and clay 20% by mass percentage.
In the present embodiment, contain 54.8% Al by mass percentage, in the bauxite in heavy layer2O3And 2.46% Fe2O3；Contain 45.4% Al in M45 mullite in heavy layer2O3And 1.03% Fe2O3；In clay in heavy layer Containing 28.3% Al2O3And 1.43% Fe2O3。
In the present embodiment, by mass percentage, the light-weight mullite in light layer contains 65.8% Al2O3, 28.6% SiO2And 2.3% Fe2O3；Floating bead in light layer contains 26.8% Al2O3, 63.7% SiO2And 3.5% Fe2O3。
Further, the faying face of heavy layer described in the present embodiment and light layer is zigzag, and bond strength is higher.
Example IV: the manufacturing method of inner liner of rotary kiln composite brick in embodiment three, comprising the following steps:
1) heavy layer material and lightweight layer material are respectively fed to Wet wheel roller mixed grind；
2) the resulting heavy layer material of mixed grind and lightweight layer material are sequentially placed into compacting tool set by specified amount, in 630T The lower compacting of press effect obtains adobe；
3) adobe is put into kiln, 8h is fired at 1410 DEG C, inner liner of rotary kiln composite brick is made.
The thermal conductivity of inner liner of rotary kiln composite brick its heavy layer obtained in example IV is 1.6w/m.k, light layer Thermal conductivity is 0.851.6w/m.k；By the inner liner of rotary kiln composite brick in the present embodiment in 4.5m × 90m aluminium oxide and active stone It is used on grey calcination rotary kiln, clinkering zone service life was by original high-alumina brick 8 months or so 16 months improved till now More than, kiln shell temperature is reduced to 250 DEG C or so by original 300 DEG C or so, and cooling effect is obvious.
In summary it is found that inner liner of rotary kiln brick and liner composite brick in the embodiment of the present invention, alkali erosiveness can be bright The aobvious high-alumina brick used better than current rotary kiln, thermal shock resistance and wearability also have larger improvement, and life of product has obviously It improves；And kiln shell temperature can be effectively reduced in liner composite brick obtained, reduce heat loss, reduce rotary kiln energy consumption, simultaneously also Inner liner of rotary kiln weight can be mitigated, be conducive to rotary kiln running.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (3)

1. a kind of inner liner of rotary kiln composite brick, it is characterised in that: the light layer including heavy layer and above heavy layer；It is described Heavy layer by mass percentage, is made of bauxite 25%, M45 mullite 58% and clay 17%；The light layer presses matter Percentages are measured, are made of floating bead 20%, light-weight mullite 60% and clay 20%；
By mass percentage, 54.8% Al is contained in the bauxite in heavy layer2O3And 2.46% Fe2O3；In heavy layer Contain 45.4% Al in M45 mullite2O3And 1.03% Fe2O3；Contain 28.3% Al in clay in heavy layer2O3, and 1.43% Fe2O3；
By mass percentage, the light-weight mullite in light layer contains 65.8% Al2O3, 28.6% SiO2And 2.3% Fe2O3；Floating bead in light layer contains 26.8% Al2O3, 63.7% SiO2And 3.5% Fe2O3。
2. inner liner of rotary kiln composite brick according to claim 1, it is characterised in that: the combination of the heavy layer and light layer Face is zigzag.
3. the manufacturing method of inner liner of rotary kiln composite brick in a kind of claim 1, it is characterised in that: the following steps are included:
1) heavy layer material and lightweight layer material are respectively fed to Wet wheel roller mixed grind；
2) the resulting heavy layer material of mixed grind and lightweight layer material are sequentially placed into compacting tool set by specified amount, in 630T press The lower compacting of effect obtains adobe；
3) adobe is put into kiln, 8h is fired at 1410 DEG C, inner liner of rotary kiln composite brick is made.
CN201610638357.1A 2016-08-05 2016-08-05 Inner liner of rotary kiln brick, liner composite brick and its manufacturing method Active CN106242598B (en)

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Publication number Priority date Publication date Assignee Title
CN109579539A (en) * 2018-11-26 2019-04-05 山东耐材集团鲁耐窑业有限公司 Aluminous fly-ash extracts alumina slurry calcination rotary kiln intermediate zone high-strength alkaline-resisting composite brick and preparation method thereof
CN113956054B (en) * 2021-10-12 2023-10-20 佛山市天禄智能装备科技有限公司 Heat-insulating refractory material for rotary kiln and preparation method thereof
CN115093230A (en) * 2022-06-14 2022-09-23 山东华恩新材料科技有限公司 Boron carbide bulletproof ceramic with radar stealth performance and preparation method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1693288A (en) * 2005-05-12 2005-11-09 符宗德 Mullite composite brick for basic rotary kiln
CN102235820A (en) * 2011-07-26 2011-11-09 浙江大学 Lining structure of rotary kiln
CN102659421A (en) * 2012-03-31 2012-09-12 马钢(集团)控股有限公司 Production method of mullite cast steel brick
CN102788497A (en) * 2012-09-07 2012-11-21 厚波 Special composite firebrick for rotary kiln and preparation method thereof
CN103058685A (en) * 2013-01-25 2013-04-24 苏州罗卡节能科技有限公司 Medium-density silicon mullite brick used for rotary kiln and preparation method thereof
CN103234346A (en) * 2013-05-10 2013-08-07 郑州瑞泰耐火科技有限公司 Low-heat-conduction multi-layer mullite brick and preparation method thereof
CN103819206A (en) * 2013-11-29 2014-05-28 浙江瑞泰耐火材料科技有限公司 Zirconium mullite red brick and preparation technology thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1693288A (en) * 2005-05-12 2005-11-09 符宗德 Mullite composite brick for basic rotary kiln
CN102235820A (en) * 2011-07-26 2011-11-09 浙江大学 Lining structure of rotary kiln
CN102659421A (en) * 2012-03-31 2012-09-12 马钢(集团)控股有限公司 Production method of mullite cast steel brick
CN102788497A (en) * 2012-09-07 2012-11-21 厚波 Special composite firebrick for rotary kiln and preparation method thereof
CN103058685A (en) * 2013-01-25 2013-04-24 苏州罗卡节能科技有限公司 Medium-density silicon mullite brick used for rotary kiln and preparation method thereof
CN103234346A (en) * 2013-05-10 2013-08-07 郑州瑞泰耐火科技有限公司 Low-heat-conduction multi-layer mullite brick and preparation method thereof
CN103819206A (en) * 2013-11-29 2014-05-28 浙江瑞泰耐火材料科技有限公司 Zirconium mullite red brick and preparation technology thereof

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