CN109111215A - A kind of cement rotary kiln low aluminum silicon not brick and preparation method thereof - Google Patents

A kind of cement rotary kiln low aluminum silicon not brick and preparation method thereof Download PDF

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Publication number
CN109111215A
CN109111215A CN201810991472.6A CN201810991472A CN109111215A CN 109111215 A CN109111215 A CN 109111215A CN 201810991472 A CN201810991472 A CN 201810991472A CN 109111215 A CN109111215 A CN 109111215A
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brick
low aluminum
rotary kiln
low
cement rotary
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Inventor
马淑龙
王治峰
马飞
孙艳粉
孔祥魁
张积礼
倪高金
高长贺
冯立新
杨斌
周晓伟
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BEIJING TONGDA GREEN AND HIGH TEMPERATURE NEW MATERIAL ENGINEERING RESEARCH CENTER Co Ltd
GONGYI TONGDA ZHONGYUAN REFRACTORY TECHNOLOGY Co Ltd
TONGDA REFRACTORY TECHNOLOGIES Co Ltd
Original Assignee
BEIJING TONGDA GREEN AND HIGH TEMPERATURE NEW MATERIAL ENGINEERING RESEARCH CENTER Co Ltd
GONGYI TONGDA ZHONGYUAN REFRACTORY TECHNOLOGY Co Ltd
TONGDA REFRACTORY TECHNOLOGIES Co Ltd
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Priority to CN201810991472.6A priority Critical patent/CN109111215A/en
Publication of CN109111215A publication Critical patent/CN109111215A/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
    • C04B35/01—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
    • C04B35/10—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 aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • C—CHEMISTRY; METALLURGY
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    • 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
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    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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    • 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
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    • 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
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    • 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
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
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Abstract

The invention discloses a kind of cement rotary kiln low aluminum silicon not bricks, brick does not pass through low aluminum-containing mullite homogeneous material 40%~80% to the low aluminum silicon, bauxite chamotte 0%~45%, silicon carbide 5%~10%, Guangxi white clay 3%~10% and spent pulping liquor according to certain gradation amount ratio mixing, brickmaking base, drying, firing and etc. be prepared.Obtained siliceous mullite brick is wide using source, low-cost low aluminum-containing mullite homogeneous material is raw material, the bulk density of its brick body is low, thermal conductivity is low, thermal coefficient is low, the temperature of cement rotary kiln barrel can be substantially reduced, reduce heat loss, energy consumption, further reduced the preparation cost of the low aluminium brick；The siliceous mullite brick is substantially reduced containing aluminium, alkali resistance is strong, and wear-resisting, anti-erosion can preferably be used for clinkering zone and the preheating zone of cement rotary kiln, has good development and application prospect.

Description

A kind of cement rotary kiln low aluminum silicon not brick and preparation method thereof
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of cement rotary kiln low aluminum silicon not brick and its preparation Method.
Technical background
Using rotary kiln as high temperature kiln, it is most general at present for being used to produce refractory raw material and processing rubbish by calcining All over, be also most economical environmental protection production technology, which has many advantages, such as that adaptability to raw material is strong, and resource recovery is high.Rotary kiln Liner be refractory material, in the rotary kiln course of work, refractory material is rotated with rotary kiln shell, by housing into rotation produce Raw stress, and the rolling impact by high-temperature material, friction and erosion are than more serious.And wherein cement rotary kiln clinkering zone It is the worst position of working environment in whole system, bears more to wear than preheating zone and cooling zone, the portion at the position Material is divided to be in fritting or fine melt state, the content of slag is high in material, fluctuation is big, viscosity is low, and temperature fluctuation is big, affected by hot loading And the influences such as mechanical stress are big, thermal coefficient is high, causes cylinder appearance radiation loss serious, and cement ton clinker coal consumption increases, cylinder Body temperature distortion increases the pressure of kiln body support roller, influences service life of equipment.Therefore, the refractory lining building ring of kiln Border is very harsh, and for the performance of its refractory material, higher requirements are also raised.
Harsh rotary kiln is required for liner, has been carried out continuous research and probe in the prior art to improve rotary kiln The performance of inner lining refractory generallys use the skeleton that high alumina constitutes siliceous mullite brick, with SiC, Al2O3And SiO2Material is constituted Matrix is prepared siliceous mullite brick, but the introducing of silicon carbide and highdensity bauxite clinker cause the siliceous mullite brick thermal conductivity of preparation compared with Height is easy to cause barrel temperature higher and cylinder of rotary kiln is caused to deform the waste with the energy.Therefore, the raw material system of high aluminium content Standby mullite brick is not only at high cost, and the performance that siliceous mullite brick is made can not meet the requirement of prior art fast development.Document It is mentioned in (" research and application that mullite homogeneous material prepares novel siliceous mullite brick ", the refined Chinese building material report of Xia Wen) equal using mullite Material substitutes the bauxite chamotte that content is 85% or 88%, has the Optimalities such as low stomata, low creep, high abrasion with preparation The siliceous mullite brick of energy.But aluminium content reaches 70% in the mullite homogeneous material wherein used, alkaline resistance properties cannot still reach compared with Good using effect, bulk density and thermal conductivity are higher, and effect is not satisfactory.
Summary of the invention
Technical problem solved by the present invention is in the prior art, simply using bauxite chamotte and being prepared as skeleton The siliceous mullite brick porosity is high, thermal conductivity is compared with high, bulk density is big (weight is big), be easy to cause barrel temperature higher and cause to turn round The waste of kiln cylinder body deformation and the energy；Wearability is poor cannot to be preferably used for making for cement rotary kiln clinkering zone and preheating zone With；When replacing bauxite chamotte to prepare siliceous mullite brick using mullite homogeneous material, mullite homogeneous material aluminium oxide used contains Amount still reaches 70%, and alkali resistance is poor, thermal conductivity is higher.
In view of the above-mentioned problems, the present invention provides a kind of cement kiln low aluminum silicon not brick and preparation method thereof, the low aluminum silicon Not brick solve that siliceous mullite brick thermal conductivity used in cement rotary kiln is high, barrel temperature is higher and caused by cement rotary kiln barrel The problem of deformation and energy waste；The comprehensive utilization of low-grade bauxite resource is realized, to improve bauxite resource comprehensive benefit With rate, it is in short supply with great significance to alleviate quality refractory bauxite.
The present invention is achieved by the following technical solutions
A kind of cement rotary kiln low aluminum silicon not brick, the siliceous mullite brick by the raw material preparation of following weight percentage and At: low aluminum-containing mullite homogeneous material 40%~85%, bauxite chamotte 0%~45%, silicon carbide 5%~10%, Guangxi white clay 3%~10%；
The additional spent pulping liquor for accounting for above-mentioned raw materials total weight 2~5%.
With low aluminum silicon, brick, the siliceous mullite brick are not prepared the cement rotary kiln by the raw material of following weight percentage It forms: low aluminum-containing mullite homogeneous material 40%~80%, bauxite chamotte 5%~45%, silicon carbide 5%~10%, Guangxi White Mud 3%-8%；The additional spent pulping liquor for accounting for above-mentioned raw materials total weight 2~5%.
Cement rotary kiln low aluminum silicon not brick, Al in the low aluminum-containing mullite homogeneous material2O3Mass content be 55%~62%, bulk density > 2.5g/cm3；The granularity d of low aluminum-containing mullite homogeneous material1Distribution and mass ratio are as follows: 3mm≤d1 < 5mm, 1mm≤d1< 3mm, 0.074mm≤d1< 1mm and 0mm < d1< 0.074mm presses 1:1~5:0.5~2.5:1~2.2 Mass ratio carry out ingredient.
Cement rotary kiln low aluminum silicon not brick, Al in the bauxite chamotte2O3Mass content > 75%, Bulk density > 2.80g/cm3；The partial size d of bauxite chamotte used2It is distributed following 3mm≤d2< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2< 0.074mm；The bauxite chamotte used in preparation process is 3mm≤d2< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2At least one of < 0.074mm；
When using the bauxite chamotte of two or more granularities, matched by 1:2~4:1~2:2~3 mass ratio Material.
Cement rotary kiln low aluminum silicon not brick, granularity < 0.074mm of the silicon carbide, SiC in the silicon carbide Mass content is > 90%.
Cement rotary kiln low aluminum silicon not brick, granularity < 0.044mm of the Guangxi white clay, in the white clay of Guangxi Al2O3Mass content > 28%.
With low aluminum silicon, brick, the specific gravity of the spent pulping liquor are not 1.0g/cm to the cement rotary kiln3~1.2g/cm3。
The preparation method of cement rotary kiln low aluminum silicon not brick, the cement kiln low aluminum silicon not brick includes following Step:
(1) ripe according to the requirement preparation of above-mentioned raw materials and dosage raw material low aluminum-containing mullite homogeneous material used, alumine Material, silicon carbide, Guangxi white clay and spent pulping liquor；
(2) the granularity d for first preparing step (1)1For 3mm≤d1< 5mm, 1mm≤d1< 3mm and 0.074mm≤d1< The low aluminum-containing mullite homogeneous material and granularity d of 1mm2For 3mm≤d2< 5mm, 1mm≤d2< 3mm and 0.074mm≤d2The height of < 1mm Bauxite is added in batch mixer, and 1~3min is mixed；After the completion of mixing, the spent pulping liquor that step (1) prepares is added, 1~3min is mixed；After the completion of mixing, other raw materials that step (1) prepares are added, 8~10min is mixed, mixing is equal It is even to obtain pug；
(3) pug that step (2) obtains is suppressed into adobe；
(4) adobe that step (3) obtains is placed in dry kiln and is dried, the dry moisture content < to adobe 0.5%, kiln discharge；
(5) adobe after will be dry obtained by step (4), which is placed in hyperthermia tunnel Kiln or shuttle kiln, is burnt into, in kiln Temperature, to 1350 DEG C~1450 DEG C, is then kept the temperature 10~20h at such a temperature, adobe is completed after the completion of heat preservation by room temperature Firing, cooled to room temperature, kiln discharge.
Cement rotary kiln low aluminum silicon not brick, step (3) is described to be suppressed into adobe for pug specifically: uses Moulding press, tonnage are suppressed under conditions of being 630T, and the bulk density control of adobe is 2.55~2.65g/cm3；
Cement rotary kiln low aluminum silicon not brick, drying of step (4) the described dry kiln to adobe specifically: dry Temperature control be 110~180 DEG C, drying time is 20~50h, the inlet temperature of dry kiln is 45~90 DEG C.
Compared with prior art, the present invention has following positive beneficial effect
Brick does not use low aluminum-containing mullite homogeneous material for primary raw material to low aluminum silicon of the present invention, cooperates a small amount of alumina ripe Material, silicon carbide and Guangxi White mud are prepared.Low aluminum-containing mullite homogeneous material uses level Four raw bauxite for primary raw material, is largely Muck and tail residues.These are low-grade, and by multistage homogenizing, wet process is ground altogether, and vacuum squeezes mud, high for intractable muck and tailing Techniques preparation synthesis, the low aluminum-containing mullite homogeneous materials such as warm controllable mullite sintering have mullitization degree high, and crystal phase development is good Good, water absorption rate is low, compact structure, the good technical characterstic of volume stability.The exploitation of low-aluminum mullite brick, on the one hand solves water Siliceous mullite brick thermal conductivity used in mud rotary kiln is high, barrel temperature is higher and caused by cement rotary kiln barrel deformation and energy wave The problem of taking.On the other hand to improve bauxite comprehensive resource utilization rate, alleviating quality refractory bauxite situation in short supply has Significance；
When the present invention prepares siliceous mullite brick, low aluminum-containing mullite homogeneous material can be replaced to bauxite chamotte completely, it is described Low aluminum-containing mullite homogeneous material is that a kind of porosity is low, the raw material of low-density, and the siliceous mullite brick bulk density prepared using the raw material is low, Thermal conductivity is low；Low aluminum-containing mullite homogeneous material itself object phase composition is mullite phase, and mullite is mutually spearhead shape twin crystal structure, each other Grid is intersected into, so that material has good high-temperature mechanical property, excellent wear-resisting property.That is low aluminum-containing mullite homogeneous material A kind of mullite phase is directly provided for the preparation of brick, is very beneficial for the raising of siliceous mullite brick performance.Low aluminum-containing mullite homogeneous material Middle Al2O3Content be 55~62%, effectively reduce the aluminium content prepared in siliceous mullite brick, improve the alkaline-resisting of mullite brick Performance, reduces bulk density, and thermal coefficient reduces；
Aluminium content is generallyd use for can preferably be used in the brick of cement kiln clinkering zone and preheating zone in the prior art Reach 85% or more raw material to be prepared, with obtain better performances, be able to use product in cement kiln；But it uses high Aluminium content is prepared by raw material, and cost of material is high and alkaline resistance properties is low, and alkalinity height itself, alkaline resistance properties in cement kiln Low refractory brick then significantly reduces its service life, and thermal conductivity is high, leads to a large amount of heat loss.The present invention is using low Aluminum-containing mullite homogeneous material is raw material, and the raw material sources are wide, at low cost, and the mullite brick performance prepared is fully able to reach cement The performance of kiln, while improving its alkaline resistance properties, reducing thermal conductivity, reduce heat loss, it is energy-saving！Further drop Cost in low cement kiln production.
The present invention is replaced using low aluminum-containing mullite homogeneous material part or all instead of alumine homogeneous material, and low product are realized Position alumina comprehensive utilization of resources, brick does not significantly reduce thermal conductivity and bulk density to the low aluminum silicon of preparation, reduces cylinder temperature The load of degree and cylinder, realizes energy-saving purpose.
The low aluminum silicon prepared by the present invention not Al in brick2O3Mass content be 50%~60%, SiC mass content be 4%~ 8%；Obtained low aluminum silicon not the brick porosity it is very low, less than 16%, product density 2.45g/cm3~2.55g/cm3, compressive resistance Greater than 60MPa, thermal shock resistance > 10 time, refractoriness under load > 1550 DEG C, indices function admirable.
Brick not can be applied to the upper intermediate zone of rotary kiln to obtained low aluminum silicon and preheating zone, the product are led with low Heat, high temperature resistant, wear-resisting, anti-erosion, scour resistance good characteristics, long service life.
Specific embodiment
The present invention is described in more details below by specific embodiment, but is not intended to restrict the invention Protection scope.
Embodiment 1
A kind of cement rotary kiln low aluminum silicon not brick, be prepared by the raw material of following weight percentage: mullite is equal Material 40%, bauxite chamotte 45%, silicon carbide 10%, Guangxi white clay 5%；The additional paper for accounting for above-mentioned raw materials gross mass 3% Pulp waste.
Wherein, the granularity d of low aluminum-containing mullite homogeneous material used1Distribution and mass ratio are as follows: 3mm≤d1< 5mm, 1mm≤ d1< 3mm, 0.074mm≤d1< 1mm and 0mm < d1< 0.074mm presses 6%, 15%, 8%, and 11% mass ratio carries out ingredient；
The partial size d of bauxite chamotte used2Distribution and mass ratio are as follows: 3mm≤d2< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2< 0.074mm carries out ingredient by the mass ratio of 5%:20%:10%:10%.
The preparation method of the cement rotary kiln low aluminum silicon not brick, comprising the following steps:
(1) prepare raw material low aluminum-containing mullite homogeneous material 40% used, bauxite chamotte 45%, carbon according to above-mentioned requirements SiClx 10%, Guangxi white clay 5% and spent pulping liquor；
(2) the granularity d for first preparing step (1)1For 3mm≤d1< 5mm, 1mm≤d1< 3mm and 0.074mm≤d1< The low aluminum-containing mullite homogeneous material and granularity d of 1mm2For 3mm≤d2< 5mm, 1mm≤d2< 3mm and 0.074mm≤d2The height of < 1mm Bauxite is added in batch mixer, and 1~3min is mixed；After the completion of mixing, the spent pulping liquor that step (1) prepares is added, 1~3min is mixed；After the completion of mixing, other raw materials that step (1) prepares are added, 8~10min is mixed, mixing is equal It is even to obtain pug；
(3) pug that step (2) obtains is compressed to adobe using moulding press, the pressure that when compacting uses is 630T； The bulk density for suppressing time control brickmaking base is 2.55g/cm3~2.65g/cm3；
(4) adobe that step (3) compacting obtains is placed in dry kiln and is dried, temperature when dry is 120 DEG C, does The dry time is the dry water content < 0.5% to adobe for 24 hours, kiln discharge；
(5) adobe of step (4) after dry is placed in hyperthermia tunnel Kiln and is burnt into, the temperature in hyperthermia tunnel Kiln By room temperature to 1380 DEG C, 12h is then kept the temperature at such a temperature, completes to be burnt into after the completion of heat preservation, cooled to room temperature, Kiln discharge.
Brick does not carry out performance detection to the low aluminum silicon prepared to the embodiment: close by GB/T2997-2000 detection volume of sample Degree and apparent porosity detect sample cold crushing strength by GB/T5072-2008, by the loading of YB/370-1995 detection sample Softening temperature, by the thermal shock resistance (1100 DEG C, water cooling) of YB/T376.1-1995 detection sample, testing result is as follows: preparation Low aluminum silicon not brick Al2O3Content is 59.8%, apparent porosity 15.6%, bulk density 2.55g/cm3, cold crushing strength 71.3MPa, wear-resisting property 4.9cm3, 1588 DEG C of refractoriness under load, (1100 DEG C, water cooling) of thermal shock resistance are greater than 10 times；Make It is greater than 3 years with the service life.
Embodiment 2
A kind of cement rotary kiln low aluminum silicon not brick, be prepared by the raw material of following weight percentage: mullite is equal Material 60%, bauxite chamotte 26%, silicon carbide 8%, Guangxi white clay 6%；The additional paper pulp for accounting for above-mentioned raw materials gross mass 4% Waste liquid.
Wherein, the granularity d of low aluminum-containing mullite homogeneous material used1Distribution and mass ratio are as follows: 3mm≤d1< 5mm, 1mm≤ d1< 3mm, 0.074mm≤d1< 1mm and 0mm < d1< 0.074mm presses 10%, 30%, 10%, and 10% mass ratio is matched Material.
The partial size d of bauxite chamotte used2Distribution and mass ratio are as follows: 3mm≤d1< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2< 0.074mm presses 0%, 10%, 6%, and 10% mass ratio carries out ingredient.
The preparation method of the cement rotary kiln low aluminum silicon not brick, comprising the following steps:
(1) prepare raw material low aluminum-containing mullite homogeneous material 60% used, bauxite chamotte 26%, carbon according to above-mentioned requirements SiClx 8%, Guangxi white clay 6% and spent pulping liquor；
(2) the granularity d for first preparing step (1)1For 3mm≤d1< 5mm, 1mm≤d1< 3mm and 0.074mm≤d1< The low aluminum-containing mullite homogeneous material and granularity d of 1mm2For 3mm≤d2< 5mm, 1mm≤d2< 3mm and 0.074mm≤d2The height of < 1mm Bauxite is added in batch mixer, and 1~3min is mixed；After the completion of mixing, the spent pulping liquor that step (1) prepares is added, 1~3min is mixed；After the completion of mixing, other raw materials that step (1) prepares are added, 8~10min is mixed, mixing is equal It is even to obtain pug；
(3) pug that step (2) obtains is compressed to adobe using moulding press, the pressure that when compacting uses is 630T； The bulk density for suppressing time control brickmaking base is 2.55g/cm3~2.65g/cm3；
(4) adobe that step (3) compacting obtains is placed in dry kiln and is dried, temperature when dry is 120 DEG C, does The dry time is the dry water content < 0.5% to adobe for 24 hours, kiln discharge；
(5) adobe of step (4) after dry is placed in hyperthermia tunnel Kiln and is burnt into, the temperature in hyperthermia tunnel Kiln By room temperature to 1380 DEG C, 12h is then kept the temperature at such a temperature, completes to be burnt into after the completion of heat preservation, cooled to room temperature, Kiln discharge.
Brick does not carry out performance detection to the low aluminum silicon prepared to the embodiment: close by GB/T2997-2000 detection volume of sample Degree and apparent porosity detect sample cold crushing strength by GB/T5072-2008, by the loading of YB/370-1995 detection sample Softening temperature, by the thermal shock resistance (1100 DEG C, water cooling) of YB/T376.1-1995 detection sample, testing result is as follows: preparation Low aluminum silicon not brick Al2O3Content is 57.6%, apparent porosity 15.1%, bulk density 2.52g/cm3, cold crushing strength 78.9MPa, wear-resisting property 4.5cm3, 1610 DEG C of refractoriness under load, (1100 DEG C, water cooling) of thermal shock resistance are greater than 10 times；Make (it is greater than 3 years) with the service life.
Embodiment 3
A kind of cement rotary kiln low aluminum silicon not brick, be prepared by the raw material of following weight percentage: mullite is equal Material 80%, bauxite chamotte 5%, silicon carbide 10%, Guangxi white clay 5%；The additional paper pulp for accounting for above-mentioned raw materials gross mass 5% Waste liquid.
Wherein, the granularity d of low aluminum-containing mullite homogeneous material used1Distribution and mass ratio are as follows: 3mm≤d1< 5mm, 1mm≤ d1< 3mm, 0.074mm≤d1< 1mm and 0mm < d1< 0.074mm is matched by the mass ratio of 10%:35%:20%:15% Material；
The partial size d of bauxite chamotte used2Distribution and the following 3mm≤d of mass ratio1< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2< 0.074mm presses 0%, 0%, 0%, and 5% mass ratio carries out ingredient.
The preparation method of the cement rotary kiln low aluminum silicon not brick, comprising the following steps:
(1) prepare raw material low aluminum-containing mullite homogeneous material 80% used, bauxite chamotte 5%, carbon according to above-mentioned requirements SiClx 10%, Guangxi white clay 5% and spent pulping liquor；
(2) the granularity d for first preparing step (1)1For 3mm≤d1< 5mm, 1mm≤d1< 3mm and 0.074mm≤d1< The low aluminum-containing mullite homogeneous material and granularity d of 1mm2For 3mm≤d2< 5mm, 1mm≤d2< 3mm and 0.074mm≤d2The height of < 1mm Bauxite is added in batch mixer, and 1~3min is mixed；After the completion of mixing, the spent pulping liquor that step (1) prepares is added, 1~3min is mixed；After the completion of mixing, other raw materials that step (1) prepares are added, 8~10min is mixed, mixing is equal It is even to obtain pug；
(3) pug that step (2) obtains is compressed to adobe using moulding press, the pressure that when compacting uses is 630T； The bulk density for suppressing time control brickmaking base is 2.55g/cm3~2.65g/cm3；
(4) adobe that step (3) compacting obtains is placed in dry kiln and is dried, temperature when dry is 120 DEG C, does The dry time is for 24 hours), the dry water content < 0.5% to adobe, kiln discharge；
(5) adobe of step (4) after dry is placed in hyperthermia tunnel Kiln and is burnt into, the temperature in hyperthermia tunnel Kiln By room temperature to 1400 DEG C, 10h is then kept the temperature at such a temperature, completes to be burnt into after the completion of heat preservation, cooled to room temperature, Kiln discharge.
Brick does not carry out performance detection to the low aluminum silicon prepared to the embodiment: close by GB/T2997-2000 detection volume of sample Degree and apparent porosity detect sample cold crushing strength by GB/T5072-2008, by the loading of YB/370-1995 detection sample Softening temperature, by the thermal shock resistance (1100 DEG C, water cooling) of YB/T376.1-1995 detection sample, testing result is as follows: preparation Low aluminum silicon not brick (Al2O3Content is 52.7%) apparent porosity 14.8%, bulk density 2.48g/cm3, cold crushing strength 71.5MPa, wear-resisting property (4.3cm3), 1635 DEG C of refractoriness under load, (1100 DEG C, water cooling) of thermal shock resistance are greater than 10 times； Service life is greater than 3 years.
Embodiment 4
A kind of cement rotary kiln low aluminum silicon not brick, be prepared by the raw material of following weight percentage: mullite is equal Material 85%, bauxite chamotte 0, silicon carbide 10%, Guangxi white clay 5%；The additional paper pulp for accounting for above-mentioned raw materials gross mass 4% is useless Liquid.
Wherein, the granularity d of low aluminum-containing mullite homogeneous material used1Distribution and mass ratio are as follows: 3mm≤d1< 5mm, 1mm≤ d1< 3mm, 0.074mm≤d1< 1mm and 0mm < d1< 0.074mm is matched by the mass ratio of 8%:40%:20%:17% Material；
The preparation method of the cement rotary kiln low aluminum silicon not brick, comprising the following steps:
(1) prepare raw material low aluminum-containing mullite homogeneous material 85% used, bauxite chamotte 0, carbonization according to above-mentioned requirements Silicon 10%, Guangxi white clay 5% and spent pulping liquor；
(2) the granularity d for first preparing step (1)1For 3mm≤d1< 5mm, 1mm≤d1< 3mm and 0.074mm≤d1< The low aluminum-containing mullite homogeneous material of 1mm is added in batch mixer, and 1~3min is mixed；After the completion of mixing, step (1) is added and prepares Spent pulping liquor, be mixed 1~3min；After the completion of mixing, other raw materials that addition step (1) prepares, mixing 8~ 10min is uniformly mixed and obtains pug；
(3) pug that step (2) obtains is compressed to adobe using moulding press, the pressure that when compacting uses is 630T； The bulk density for suppressing time control brickmaking base is 2.55g/cm3~2.65g/cm3；
(4) adobe that step (3) compacting obtains is placed in dry kiln and is dried, temperature when dry is 120 DEG C, does The dry time is the dry water content < 0.5% to adobe for 24 hours, kiln discharge；
(5) adobe of step (4) after dry is placed in hyperthermia tunnel Kiln and is burnt into, the temperature in hyperthermia tunnel Kiln By room temperature to 1400 DEG C, 10h is then kept the temperature at such a temperature, completes to be burnt into after the completion of heat preservation, cooled to room temperature, Kiln discharge.
Brick does not carry out performance detection to the low aluminum silicon prepared to the embodiment: close by GB/T2997-2000 detection volume of sample Degree and apparent porosity detect sample cold crushing strength by GB/T5072-2008, by the loading of YB/370-1995 detection sample Softening temperature, by the thermal shock resistance (1100 DEG C, water cooling) of YB/T376.1-1995 detection sample, testing result is as follows: preparation Low aluminum silicon not brick Al2O3Content is 51.8%, apparent porosity 14.7%, bulk density 2.46g/cm3, cold crushing strength 73.9MPa, wear-resisting property 4.4cm3, 1630 DEG C of refractoriness under load, (1100 DEG C, water cooling) of thermal shock resistance are greater than 10 times；Make It is greater than 3 years with the service life.

Claims (10)

1. a kind of cement rotary kiln low aluminum silicon not brick, which is characterized in that the siliceous mullite brick is by following weight percentage Raw material is prepared: low aluminum-containing mullite homogeneous material 40%~85%, bauxite chamotte 0%~45%, and silicon carbide 5%~ 10%, Guangxi white clay 3%~10%；
The additional spent pulping liquor for accounting for above-mentioned raw materials total weight 2~5%.
2. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the siliceous mullite brick is by following The raw material of weight percentage is prepared: low aluminum-containing mullite homogeneous material 40%~80%, bauxite chamotte 5%~45%, Silicon carbide 5%~10%, Guangxi white clay 3%~8%；
The additional spent pulping liquor for accounting for above-mentioned raw materials total weight 2~5%.
3. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the low aluminum-containing mullite is equal Al in material2O3Mass content be 55%~62%, bulk density > 2.5g/cm3；The granularity d of low aluminum-containing mullite homogeneous material1Point Cloth and mass ratio are as follows: 3mm≤d1< 5mm, 1mm≤d1< 3mm, 0.074mm≤d1< 1mm and 0mm < d1< 0.074mm is pressed 1:1~5:0.5~2.5:1~2.2 mass ratio carries out ingredient.
4. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the bauxite chamotte Middle Al2O3Mass content > 75%, bulk density > 2.80g/cm3；The partial size d of bauxite chamotte used2It is distributed following 3mm ≤d2< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2< 0.074mm；The high alumina used in preparation process Bauxite clinker is 3mm≤d2< 5mm, 1mm≤d2< 3mm, 0.074mm≤d2< 1mm and 0mm < d2In < 0.074mm at least It is a kind of；
When using the bauxite chamotte of two or more granularities, ingredient is carried out by 1:2~4:1~2:2~3 mass ratio.
5. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the granularity of the silicon carbide < 0.074mm, SiC mass content is > 90% in the silicon carbide.
6. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the granularity of the Guangxi white clay < 0.044mm, Al in the white clay of Guangxi2O3Mass content > 28%.
7. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the specific gravity of the spent pulping liquor For 1.0g/cm3~1.2g/cm3。
8. cement rotary kiln according to claim 1 low aluminum silicon not brick, which is characterized in that the cement kiln low aluminum silicon Not brick preparation method the following steps are included:
(1) the raw materials and consumption preparation required according to claim 1 raw material low aluminum-containing mullite homogeneous material used, alumine are ripe Material, silicon carbide, Guangxi white clay and spent pulping liquor；
(2) the granularity d for first preparing step (1)1For 3mm≤d1< 5mm, 1mm≤d1< 3mm and 0.074mm≤d1< 1mm's Low aluminum-containing mullite homogeneous material and granularity d2For 3mm≤d2< 5mm, 1mm≤d2< 3mm and 0.074mm≤d2The high alumina alum of < 1mm Native clinker is added in batch mixer, and 1~3min is mixed；After the completion of mixing, the spent pulping liquor that step (1) prepares is added, mixing Stir 1~3min；After the completion of mixing, other raw materials that step (1) prepares are added, 8~10min is mixed, is uniformly mixed To pug；
(3) pug that step (2) obtains is suppressed into adobe；
(4) adobe that step (3) obtains is placed in dry kiln and is dried, the dry moisture content < 0.5% to adobe, out Kiln；
(5) adobe after will be dry obtained by step (4), which is placed in hyperthermia tunnel Kiln or shuttle kiln, is burnt into, the temperature in kiln By room temperature to 1350 DEG C~1450 DEG C, 10~20h is then kept the temperature at such a temperature, the burning of adobe is completed after the completion of heat preservation At, cooled to room temperature, kiln discharge.
9. cement rotary kiln according to claim 8 low aluminum silicon not brick, which is characterized in that step (3) is described by pug Be suppressed into adobe specifically: use moulding press, tonnage for 630T under conditions of suppressed, the control of the bulk density of adobe For 2.55~2.65g/cm3。
10. cement rotary kiln according to claim 8 low aluminum silicon not brick, which is characterized in that step (4) described dry kiln Drying to adobe specifically: dry temperature control is 110~180 DEG C, drying time is 20~50h, the entrance of dry kiln Temperature is 45~90 DEG C.
CN201810991472.6A 2018-08-29 2018-08-29 A kind of cement rotary kiln low aluminum silicon not brick and preparation method thereof Pending CN109111215A (en)

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CN111072376A (en) * 2019-12-23 2020-04-28 通达耐火技术股份有限公司 Nano carbon source combined homogenized alumina-based silicon mullite brick and preparation method thereof
CN111533542A (en) * 2020-05-11 2020-08-14 宋政德 Low-heat-conduction high-strength anti-scouring cap opening brick and preparation method thereof
CN114380581A (en) * 2022-01-22 2022-04-22 山东耐火材料集团有限公司 Silicon nitride iron mullite silicon carbide brick for silicon-manganese alloy bag and preparation method thereof
CN115403394A (en) * 2022-08-29 2022-11-29 郑州瑞泰耐火科技有限公司 Special low-aluminum mullite brick for lithium salt rotary kiln and preparation method thereof
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CN116283248A (en) * 2023-02-03 2023-06-23 江苏华窑光宇科技有限公司 Compact composite brick for remelting aluminum furnace and manufacturing method thereof

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