CN108178644A - It is a kind of using quick burning equipment and cartridge type cooling mechanism for the technique of activated bauxite powder - Google Patents

It is a kind of using quick burning equipment and cartridge type cooling mechanism for the technique of activated bauxite powder Download PDF

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Publication number
CN108178644A
CN108178644A CN201810101053.0A CN201810101053A CN108178644A CN 108178644 A CN108178644 A CN 108178644A CN 201810101053 A CN201810101053 A CN 201810101053A CN 108178644 A CN108178644 A CN 108178644A
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powder
calcining
cartridge type
alumina
levigate
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CN201810101053.0A
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Inventor
魏瀚
王杰曾
周严敦
袁林
成洁
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RUITAI TECHNOLOGY Co Ltd
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RUITAI TECHNOLOGY Co Ltd
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Priority to CN201810101053.0A priority Critical patent/CN108178644A/en
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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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/6261—Milling
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering

Abstract

It is a kind of using quick burning equipment and cartridge type cooling mechanism for the technique of activated bauxite powder.It is homogenized after discarded alumina particulate raw material is carried out grinding in dry Vertical Mill, levigate alumina raw material enter X1, X2 and X3 preheating cylinder, are gone out furnace gases and preheated step by step；Secondly, pre- hot material is rapidly heated completion flash calcining after entering calcining furnace, high temperature powder is detached with thermal current by separating barrel, micro mist enters cartridge type cooler via pipeline, Secondary Air cools down high temperature material and in kiln tail by the material collection after calcining in cartridge type cooler, and the material after collection levigate can be made≤micro mist of 0.044mm fine powders or≤0.010mm.The plurality of advantages such as Product Activity after calcining is high, production cost is low for replacing or part substitution refractories industry common alumine powder and alumina powder, achieve the purpose that save resource, reduce and discharge, increase income and economize on spending.

Description

It is a kind of using quick burning equipment and cartridge type cooling mechanism for activated bauxite powder Technique
Technical field
The present invention relates to a kind of refractory material preparation processes, and in particular to a kind of preparation method of high bauxite clinker powder, Belong to technical field of inorganic non-metal material preparation.
Background technology
High-Alumina refractory raw material is a kind of widely used refractory raw material, for manufacturing High-Alumina, high alumina silicon carbide, height The setting such as aluminium silicon carbide carbonaceous and unshape refractory are also used for strengthening the matrix of certain tonerde fire resistant materials.It is high The traditional processing technology of aluminum fire resistant materials is：1）Exploit natural bauxite（Alumina raw material）；2）By alumina raw material crushing, screening； 3）Choose the suitable alumina raw material of granularity（10-60mm when being handled such as rotary kiln）It is calcined；4）Burned alumina warp is crushed, It is sieved into oversize（Such as>5mm）, coarse granule（Such as 5-1mm）, fine grained（<1mm)；5）It is again that oversize or dispensing is extra Fine powder is made in coarse granule or fine grained grinding（<0.088mm）；6）Finally, it is fixed to be prepared using coarse granule, fine grained, fine powder dispensing Shape or unshape refractory.When preparing unsetting high alumina refractories, remove using coarse granule, fine grained, fine powder during dispensing Except, it also needs to use alumina powder（Such as<5μm）And silicon ash（Such as<1μm）, to improve the bulk density of batch, reduce fire resisting The porosity of material and the bulk density for improving refractory material.One of above-mentioned processing disadvantages：Only it is utilized>The alumina life of 10mm Material, does not utilize<The alumina raw material of 10mm cause the wasting of resources, while if are mixed with in raw material during calcined by rotary kiln alumina Particulate alumina will be adhered to kiln body under high temperature in the particulate alumina of semi-molten state, form ring formation and cause to stop kiln.Above-mentioned technique The two of shortcoming：Alumina raw material are first burnt into solid, fine and close block using high temperature, then expends very big electric energy and is crushed and powder Wear into fine powder.The three of above-mentioned processing disadvantages：Configuration high alumina castable is all that expensive fire resisting is former using silicon ash and alumina powder Material, silicon ash still prepare the rare raw material of high performance concrete.If the particulate alumina that will be abandoned when manufacturing bauxite chamotte Raw material homogenizing, coordinates drying with other raw materials again, can be synthesized through mixing, levigate, mixing, molding, drying, tunnel oven firing Alumina base mullite raw material.But technological process is long, equipment investment is more, firing when green body larger contraction occurs, cause hot wind short Road and heat exchanger effectiveness are low, and production cost remains high, and synthesis alumina base mullite raw material is difficult to sell.
Invention content
In order to using discarded particulate alumina raw material, save the electric energy consumed during grinding high alumina fine powder, reduce cooperation The costliness raw material such as the silicon ash used during amorphous refractory and alumina powder, the present invention are washed in a pan using hot industry transition and upgrade The small-sized rotary kiln to get off is eliminated, develops a kind of new active bauxite chamotte production Technology.
The present invention relates to a kind of preparation method of high bauxite clinker powder, specific process step includes：
（1）Grinding is homogenized：Discarded alumina raw is subjected to grinding extremely in dry Vertical Mill<After 0.088mm, by the powder after grinding Material is sent into homogenizing storehouse and is homogenized；
（2）Calcining：By levigate alumina raw material be sent into calcining unit calcine, calcine by three-level whirlwind preheat cylinder X1, X2, X3 with And calcining furnace composition, the powder exported from homogenizing storehouse, X1, X2 and X3 preheating cylinder are sequentially entered, is gone out furnace gases and preheated step by step, in advance Hot material enters calcining furnace and is rapidly heated to 1150 DEG C -1350 DEG C, keeps 10s-20s, to complete flash calcining；
（3）Cooling recycling：Material after calcining enters cooling recovery unit, cooling recovery unit by sub-material cylinder, cartridge type cooler, Cottrell, exhaust fan unit into, high temperature powder is detached with thermal current by separating barrel, and powder enters cartridge type cooler via pipeline, High temperature material block is cooled down and will expect that block is collected in kiln tail by First air in cartridge type cooler, and the material after collection levigate can be made≤ The micro mist of 0.044mm fine powders or≤0.010mm；The gas of discharge separating barrel is again introduced into X3 preheating buckets, when air-flow is being discharged Through being discharged by exhaust blower after electricity gathers dust filter powder after X1 preheating buckets, the powder recycled via cottrell is recycled to X1 preheatings In cylinder.
The preheating cylinder plays a part of to preheat waste heat in stove material and recycling kiln discharge exhaust gas.The calcining furnace and inverted U Pipe, raising mildly keep the effect of calcination time.The cartridge type cooler, is transformed by the rotary kiln of former hot industry, is risen Cooling calcining material and waste heat enter the effect of stove air.
Diaspore and kaolinite in warm-up phase, alumine raw material complete dehydration.It is formed after diaspore dehydration firm Beautiful illusion, still to keep the amorphous state of former diaspore shape or the substance that crystallinity is very poor；Higher ridge is formed after kaolinite dehydration Stone, high-temperature process temperature is excessively high, overlong time metakaolinite becomes mullite and amorphous silicon di-oxide, but flash calcining is main It is amorphous state and the very poor substance of crystallinity.Since crystallinity is poor, binding force is weak, the alumina that flash is calcined out has goodization Activity and excellent grindability are learned, is preferably used as the active component in refractory material matrix.
The micro powder product of the granularity≤0.044mm can be used to prepare the base in Al-Si Refractory Materials as superfine powder Matter part.The micro powder product of the granularity≤0.010mm can be used to prepare the matrix portion in Al-Si Refractory Materials as micro mist Point, partly to replace silicon ash and alumina powder.
The equipment installation cost of the process of the present invention is low, and the period is short, and the cartridge type cooler can be by small The simple transformation of type rotary system, it is possible to complete the demand of entire process route.The construction fund not only saved, more makes height Temperature industrial transition and upgrade eliminates the miniature water stall to get off and obtains utilization again.
Specific embodiment
Embodiment 1
Selecting discarded alumina particulate, chemical composition is as raw material：Al2O3=73.19%, SiO2=7.59%, Fe2O3=0.84%, TiO2=3.35%, CaO=0.12%, MgO=0.09%, K2O=0.11%, Na2O=0.13%, Loss=14.53%,
Discarded alumina raw is subjected to grinding extremely in dry Vertical Mill<After 0.088mm, the powder after grinding is sent into homogenizing storehouse Be homogenized, by levigate alumina raw material be sent into calcining unit calcine, calcine by three-level whirlwind preheat cylinder X1, X2, X3 and Calcining furnace forms, the powder exported from homogenizing storehouse, sequentially enters X1, X2 and X3 preheating cylinder, is gone out furnace gases and preheated step by step, preheated Material is rapidly heated to 1350 DEG C into calcining furnace, keeps 10s, completes flash calcining, and the material after calcining enters cooling recycling Unit, cooling recovery unit is by sub-material cylinder, cartridge type cooler, cottrell, exhaust fan unit into high temperature powder is divided with thermal current It is detached from bucket, powder enters cartridge type cooler via pipeline, and high temperature material block is cooled down and in kiln by the First air in cartridge type cooler Tail will expect that block is collected, the material after collection levigate can be made≤micro mist of 0.042mm fine powders or≤0.010mm；Discharge separating barrel Gas be again introduced into X3 preheating buckets, pass through after electricity gathers dust filter powder after air-flow is discharging X1 preheating buckets and arranged by exhaust blower Go out, the powder recycled via cottrell is recycled in X1 preheating cylinders.By the activity of the materiel machining after calcining to≤0.042mm Alumina superfine powder and the≤activated bauxite micro mist of 0.010mm for ultra-low cement mullite pouring material to be configured, match and are：8- 1.0mm fused mullites 53%,<1.0mm fused mullite=22.0%,<0.088mm fused mullites 12.8%,<0.044mm Activated bauxite superfine powder 3%,<0.010mm activated bauxites micro mist 4.2%, silicon ash 3.3%, pure calcium aluminate cement=1.7%.Wherein, it is living Property alumina superfine powder for part instead of 0.088mm fused mullites；The micro mist is instead of alumina powder.Add water 5% into After type, the performance that castable sample is made after conserving, demoulding, dry, be heat-treated is as follows：110 DEG C × 24H processing, anti-folding are strong Spend 13.6MPa, compressive resistance 92.3MPa；1100 DEG C × 3H processing, line variation -0.02%, flexural strength 18.8MPa, resistance to pressure Spend 135.7MPa；1500 DEG C × 3H processing lines variation -0.07%, flexural strength 14.4MPa, compressive resistance 136.0MPa.Gained is each Item performance is completely qualified, has achieved the purpose that part replaces alumina-silica raw material fine powder and substitution alumina powder.
Embodiment 2
Discarded alumina particulate is selected as raw material, chemical composition be select the chemical composition of alumina particulate for：Al2O3= 73.19%, SiO2=7.59%, Fe2O3=0.84%, TiO2=3.35%, CaO=0.12%, MgO=0.09%, K2O=0.11%, Na2O= 0.13%, Loss=14.55%.Discarded alumina raw is subjected to grinding extremely in dry Vertical Mill<After 0.088mm, after grinding Powder is sent into homogenizing storehouse and is homogenized, and levigate alumina raw material are sent into calcining unit and are calcined, calcines and is preheated by three-level whirlwind Cylinder X1, X2, X3 and calcining furnace composition, the powder exported from homogenizing storehouse sequentially enter X1, X2 and X3 preheating cylinder, are gone out furnace gas Body preheats step by step, and pre- hot material enters calcining furnace and is rapidly heated to 1200 DEG C, keeps 15s, completes flash calcining, the object after calcining Material enters cooling recovery unit, and cooling recovery unit is by sub-material cylinder, cartridge type cooler, cottrell, exhaust fan unit into high temperature powder Material is detached with thermal current by separating barrel, and powder enters cartridge type cooler via pipeline, and the First air in cartridge type cooler is by high temperature Expect that block cooling simultaneously will expect that block is collected in kiln tail, the material after collection levigate can be made≤0.041mm fine powders or≤0.015mm it is micro- Powder；The gas of discharge separating barrel is again introduced into X3 preheating buckets, is gathered dust filter powder through electricity after air-flow is discharging X1 preheating buckets It is discharged by by exhaust blower, the powder recycled via cottrell is recycled in X1 preheating cylinders.By the materiel machining after calcining extremely The micro mist of the activated bauxite superfine powder of≤0.041mm and≤0.015mm, for glass furnace molten tin bath clay syphon to be configured.Proportioning For：8-1mm flint clays 51.5%,<1mm flint clays 19.8%,<0.088mm flint clays 11.9%,<0.088mm alumina-baseds do not come Stone 4.6%,<0.044mm alumina superfine powder 2.0%,<0.010mm alumina micro mist 4.6%, silicon ash 4%, pure calcium aluminate cement 1.6%.Through After water is added to be molded, 1 day flexural strength 4.2MPa meets manufacturing technique requirent；After 1250 DEG C × 8h is burnt, burning line variation- 0.55%, compressive resistance 97.6MPa meet performance requirement.Experiment has reached part substitution alumina-silica raw material fine powder and substitution The purpose of alumina powder.
Embodiment 3
Discarded alumina particulate is selected as raw material, chemical composition be select the chemical composition of alumina particulate for：Al2O3= 73.19%, SiO2=7.59%, Fe2O3=0.84%, TiO2=3.35%, CaO=0.12%, MgO=0.09%, K2O=0.11%, Na2O= 0.13%, Loss=14.57%.Discarded alumina raw is subjected to grinding extremely in dry Vertical Mill<After 0.088mm, after grinding Powder is sent into homogenizing storehouse and is homogenized, and levigate alumina raw material are sent into calcining unit and are calcined, calcines and is preheated by three-level whirlwind Cylinder X1, X2, X3 and calcining furnace composition, the powder exported from homogenizing storehouse sequentially enter X1, X2 and X3 preheating cylinder, are gone out furnace gas Body preheats step by step, and pre- hot material enters calcining furnace and is rapidly heated to 1150 DEG C, keeps 20s, completes flash calcining, the object after calcining Material enters cooling recovery unit, and cooling recovery unit is by sub-material cylinder, cartridge type cooler, cottrell, exhaust fan unit into high temperature powder Material is detached with thermal current by separating barrel, and powder enters cartridge type cooler via pipeline, and the First air in cartridge type cooler is by high temperature Expect that block cooling simultaneously will expect that block is collected in kiln tail, the material after collection levigate can be made≤0.044mm fine powders or≤0.010mm it is micro- Powder；The gas of discharge separating barrel is again introduced into X3 preheating buckets, is gathered dust filter powder through electricity after air-flow is discharging X1 preheating buckets It is discharged by by exhaust blower, the powder recycled via cottrell is recycled in X1 preheating cylinders.By the materiel machining after calcining extremely The micro mist of the activated bauxite superfine powder of≤0.044mm and≤0.010mm, for glass furnace molten tin bath clay syphon to be configured.Proportioning For：8-1mm flint clays 51.5%,<1mm flint clays 19.8%,<0.088mm flint clays 11.9%,<0.088mm alumina-baseds do not come Stone 4.6%,<0.044mm alumina superfine powder 2.0%,<0.010mm alumina micro mist 4.6%, silicon ash 4%, pure calcium aluminate cement 1.6%.Through After water is added to be molded, 1 day flexural strength 4.1MPa meets manufacturing technique requirent；After 1250 DEG C × 8h is burnt, burning line variation- 0.60%, compressive resistance 97.3MPa meet performance requirement.Experiment has reached part substitution alumina-silica raw material fine powder and substitution The purpose of alumina powder.

Claims (4)

1. a kind of preparation method of high bauxite clinker powder, processing step include：
（1）Grinding is homogenized：Discarded alumina raw is subjected to grinding extremely in dry Vertical Mill<After 0.088mm, by the powder after grinding Material is sent into homogenizing storehouse and is homogenized；
（2）Calcining：By levigate alumina raw material be sent into calcining unit calcine, calcine by three-level whirlwind preheat cylinder X1, X2, X3 with And calcining furnace composition, the powder exported from homogenizing storehouse, X1, X2 and X3 preheating cylinder are sequentially entered, is gone out furnace gases and preheated step by step, in advance Hot material enters calcining furnace and completes flash calcining；
（3）Cooling recycling：Material after calcining enters cooling recovery unit, cooling recovery unit by sub-material cylinder, cartridge type cooler, Cottrell, exhaust fan unit into, high temperature powder is detached with thermal current by separating barrel, and powder enters cartridge type cooler via pipeline, High temperature material block is cooled down and will expect that block is collected in kiln tail by the First air in cartridge type cooler, and the material after collection levigate can obtain not The product of same specification；The gas of discharge separating barrel is again introduced into X3 preheating buckets, is received after air-flow is discharging X1 preheating buckets through electricity Through being discharged by exhaust blower after dirt filter powder, the powder recycled via cottrell is recycled in X1 preheating cylinders.
2. according to the method described in claim 1, it is characterized in that：In step（2）In, temperature, which controls, in the calcining furnace exists 1150 DEG C -1350 DEG C, pre- hot material keeps 10s-20s after entering calcining furnace, to complete flash calcining.
3. according to the method described in claim 1, it is characterized in that：In step（3）In, the material after the collection can be levigate ≤ 0.044mm fine powders are made.
4. according to the method described in claim 1, it is characterized in that：In step（3）In, the material after the collection can be levigate ≤ the micro mist of 0.010mm is made.
CN201810101053.0A 2018-02-01 2018-02-01 It is a kind of using quick burning equipment and cartridge type cooling mechanism for the technique of activated bauxite powder Pending CN108178644A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1600687A (en) * 2003-09-28 2005-03-30 中国科学院过程工程研究所 Rapid cycled fluidized calcining procedure for superfine kaolin and equipment
CN102006926A (en) * 2008-04-24 2011-04-06 奥图泰有限公司 Process and plant for the heat treatment of fine-grained mineral solids
CN102278878A (en) * 2011-07-09 2011-12-14 辽宁科技大学 Method for roasting bauxite in variable cross section tunnel kiln
CN104843751A (en) * 2015-06-10 2015-08-19 沈阳鑫博工业技术股份有限公司 Bauxite activation calcination low-temperature digestion system and activation, calcination and digestion method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1600687A (en) * 2003-09-28 2005-03-30 中国科学院过程工程研究所 Rapid cycled fluidized calcining procedure for superfine kaolin and equipment
CN102006926A (en) * 2008-04-24 2011-04-06 奥图泰有限公司 Process and plant for the heat treatment of fine-grained mineral solids
CN102278878A (en) * 2011-07-09 2011-12-14 辽宁科技大学 Method for roasting bauxite in variable cross section tunnel kiln
CN104843751A (en) * 2015-06-10 2015-08-19 沈阳鑫博工业技术股份有限公司 Bauxite activation calcination low-temperature digestion system and activation, calcination and digestion method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZHANG YUZHEN: "Production and Application of Aluminate Cement in China", CHINA BUILDING MATERIALS INDUSTRY PRESS, 31 January 2014 (2014-01-31) *

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