CN109251047A - A kind of preparation method of novel fire-resistant clay brick - Google Patents
A kind of preparation method of novel fire-resistant clay brick Download PDFInfo
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- CN109251047A CN109251047A CN201811165381.3A CN201811165381A CN109251047A CN 109251047 A CN109251047 A CN 109251047A CN 201811165381 A CN201811165381 A CN 201811165381A CN 109251047 A CN109251047 A CN 109251047A
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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
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Abstract
The invention discloses a kind of preparation methods of novel fire-resistant clay brick, comprising: the pretreatment of flint clay raw material, sizing screening is at coarse granule and fine grained；Coarse granule investment calcining vertical kiln is calcined；Flint clay fine grained is uniformly mixed with mild-clay, wears into mixed clay fine powder altogether；Calcined flint clay is subjected to crushing processing, classification obtains flint clay clinker particles material and flint clay clinker fine powder；The flint clay clinker particles material, flint clay clinker fine powder are mixed with mixed clay fine powder realizes that pug is kneaded, through overmolding, drying, sintering process finished product.The beneficial effects of the present invention are: the preparation method of refractory brick provided by the invention is prepared by mixed clay fine powder and flint clay clinker particles material and fine powder, raw material availability is significantly improved, waste utilization is realized, reduces production cost.Refractory brick quality of finished, the physical and chemical index produced do not reduce not only, have greatly improve instead, high temperature index significantly improves, and service life significantly increases。
Description
Technical field
The invention belongs to technical field of refractory materials, more particularly to a kind of preparation method of novel fire-resistant clay brick.
Background technique
Flint clay is a kind of cinerous block structure, the fine and close smooth hard kaoline rock of section.Usually by kaolinite
Stone (Al2O3·2SiO2·2H2O), diaspore (Al2O3·H2) and gibbsite (Al O2O3·3H2O it) constitutes.Ripe flint clay
It is that flint clay raw ore is formed after high-temperature calcination, calcined flint clay stable components, homogeneous, compact structure, section
In conchoidal, it can be used for producing high grade refractory, ceramics, aluminosilicate refractory fiber etc..
In refractory material production process, usually flint clay is calcined in calcining vertical kiln, process flow are as follows: will be sieved
Flint clay raw material afterwards are fed into kiln at the top of shaft furnace, have several natural gas combustion nozzles in the middle part upper position of shaft furnace, will be natural
Gas mixes with air after-combustion, and the high temperature mixed flue gas after burning is sent into kiln by fire-box channel, and high-temperature flue gas passes through burnt precious
When the gap of stone raw material, heat transfer occurs with flint clay raw material, heats flint clay raw material, completes the calcined of flint clay raw material
Journey.
Flint clay raw material at the top of calcining vertical kiln before feeding intake, it is necessary to it is sieved, screen aperture 20mm.This is because if not
Sieving or screen aperture are too small, and the high temperature mixed flue gas after burning can not or can not be successfully through the gap between raw material, cause in shaft furnace
Top raw material can not be successfully calcining, middle and lower part raw material burning.This has resulted in a problem, that is, the small raw material of the partial size under sieving without
Method utilizes, every about 200 tons of the daily raw material of existing 3 calcining vertical kilns of my company, wherein about 30 tons of waste material under the sieve after sieving, it is former
Expect utilization rate only 85%.Once lower waste from stacking such as mountain, tons up to ten thousand when most sieved in my company.
Summary of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of novel fire-resistant clay brick preparation side
Method, this method can effectively improve the utilization rate of flint clay raw material, reduce production cost, while can significantly improve refractory material
Applied at elevated temperature performance, enhance service life.
To achieve the above object, the present invention adopts the following technical solutions: a kind of preparation method of novel fire-resistant clay brick, packet
Include following steps:
The pretreatment of flint clay raw material, sizing screening is at coarse granule and fine grained；
It is calcined coarse granule investment calcining vertical kiln to obtain flint clay clinker；
Flint clay fine grained is uniformly mixed with mild-clay, wears into mixed clay fine powder altogether；
Flint clay clinker is subjected to pulverization process, obtains varigrained flint clay clinker particles material and flint clay clinker fine powder.
The flint clay clinker particles material and flint clay clinker fine powder are mixed with mixed clay fine powder realizes that pug is kneaded, warp
Overmolding, drying, sintering process finished product.
As an optimization, the flint clay raw material pretreatment is that sieving is handled, the coarse granule granularity is greater than 20mm, institute
Stating fine grained granularity is 0 ~ 20mm.
As an optimization, the flint clay fine grained and the mild-clay mixed proportion are mass ratio 2 ~ 4:1 ~ 3.
As an optimization, the mixed clay powder particle size is 130 ~ 230 mesh, processed using Raymond machine.
As an optimization, calcination temperature is 1200 ~ 1700 DEG C in the calcining vertical kiln.
As an optimization, the calcining flint clay grain graininess is 0~1mm, 1 ~ 2mm, 2 ~ 3mm, the flint clay clinker
Powder particle size is 130 ~ 230 mesh, and mass ratio is 20% ~ 30%:10% ~ 20%:15% ~ 25%:30% ~ 50% when use.
As an optimization, a certain proportion of flint clay clinker particles material and flint clay clinker fine powder and mixed clay are thin
Powder 2 ~ 5:1 in mass ratio mixing.
As an optimization, the briquetting pressure is 260 ~ 1000t.
As an optimization, the temperature of the drying is 110 ~ 160 DEG C, the time of the drying is 12 ~ 48h.
As an optimization, the temperature of the sintering is 1300 ~ 1500 DEG C.
The beneficial effects of the present invention are: the preparation method of refractory brick provided by the invention is by mixed clay fine powder and calcined coke
Jewel particle preparation significantly improves raw material availability, realizes waste utilization, reduces production cost.The refractory brick produced at
Product quality, physical and chemical index do not reduce not only, have greatly improve instead, and flint clay waste material is manufactured after grinding altogether with well as clay fines
Mixed clay fine powder, it is compound in flint clay particle and the high viscosity of clay firing generation in sintering procedure after being added to refractory brick
Liquid phase is formd and is inlayed to flint clay particle, changes original firebrick structure, is improved the viscosity of liquid phase, is mentioned simultaneously
The high resistance of resistance displacement of refractory brick during applied at elevated temperature, improves the applied at elevated temperature performance of refractory brick.Refractory brick
High temperature index significantly improve, service life significantly increases.
Specific embodiment
The present invention provides a kind of preparation method of novel fire-resistant clay brick, comprising:
The pretreatment of flint clay raw material, sizing screening is at coarse granule and fine grained；
It is calcined coarse granule investment calcining vertical kiln to obtain flint clay clinker；
Fine grained is uniformly mixed with mild-clay, wears into mixed clay fine powder altogether；
Calcined flint clay is subjected to crushing processing, classification obtains flint clay particulate material and fine powder；
The flint clay clinker particles material and flint clay clinker fine powder mixed with mixed clay fine powder realize pug be kneaded, by
Type, drying, sintering process finished product.
The present invention first pre-processes the flint clay raw material, pre-processes and handles the flint clay that granularity is small for sieving
I.e. fine grained sifts out, and for mode of being specifically sieved without limiting, mode well known to those skilled in the art is the present inventor
It can.In the present invention, the fine grained is preferably 0 ~ 20mm and is not 0.
The mode that the present invention mixes fine grained with mild-clay is without limiting, mixing well known to those skilled in the art
Mode, being processed into granularity is the processing method of 130 ~ 230 mesh mixed clay fine powders without limiting, and preferably Raymond machine adds
Work.
Coarse granule investment calcining vertical kiln is calcined to obtain flint clay clinker temperature to be 1200 ~ 1700 DEG C by the present invention, excellent
It is selected as 1250 ~ 1500 DEG C, more preferably 1400 DEG C；
It is preferred that calcined flint clay of the present invention carries out pulverization process specifically: rough and torn, crushing, sieving.Flint clay clinker
Particle material granularity is 0~1mm, 1 ~ 2mm, 2 ~ 3mm, and flint clay clinker powder particle size is 150 ~ 230 mesh, and mass ratio is when use
20% ~ 30%:10% ~ 20%:15% ~ 25%:30% ~ 50%.
The a certain proportion of flint clay clinker particles material of the present invention and flint clay clinker fine powder are pressed with mixed clay fine powder
2 ~ 5:1 of mass ratio mixing, more preferable 4:1 mixing.
Molding, dry, sintering obtain refractory brick after pug is kneaded in the present invention.
Heretofore described molding pressure is 260 ~ 1000t, and the drying is preferably dried, and is dried after more preferably air-drying
It is dry, it is dried in drying road after air-drying to moisture content less than 3%, preferably 110 ~ 160 DEG C of the drying temperature.
Sintering temperature of the present invention is preferably 1300 ~ 1500, and more preferably 1350 ~ 1450 DEG C；The sintering time is preferably 6
~ 8h, more preferably 6.5 ~ 7.5h.
It being kept the temperature after the sintering, the holding temperature is preferably 1300 ~ 1500 DEG C, and more preferably 1350 ~ 1450 DEG C,
The soaking time is preferably 6 ~ 8h, more preferably 6.5 ~ 7.5h.
It is of the present invention sintering, heat preservation carried out preferably in tunnel oven.Cooling after heat preservation, the cooling is preferably that nature is cold
But, the cooling time is 10 ~ 14h.By product inspection after cooling, it is packed and stored.
Present invention preferably employs following manner to carry out performance measurement to the refractory brick being prepared:
Refractoriness: refractoriness experimental furnace is utilized, is measured by GB7322-87 " refractory material refractoriness test method "；
The soft start temperature of lotus: using the soft creep test instrument of poor high temperature lotus is shown, by YB370-75 " loading softening start temperature inspection party
Method " it is measured；
Compressive resistance: electronic anti-folding instrument is utilized, is measured by the regulation of GB/T5072.2；
Reheat linear change: utilizing energy-saving high-temperature reheat testing furnace, by GB5988-86 " densification sizing refractory product reheat linear change
Test method " it is measured；
The porosity: the close analyzer of apparent pore body is utilized, is measured by the regulation of GB/T2997；
Bulk density: utilizing the close analyzer of apparent pore body, and the regulation of GB/T2997 is measured；
Chemical analysis: it is measured by the regulation of GB/T6900.
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Embodiment 1
The pretreatment of flint clay raw material, sizing screening is at coarse granule and fine grained；200kg fine grained and 200kg mild-clay are mixed
It closes in uniformly investment Raymond machine and is processed into the mixed clay fine powder that granularity is 180 mesh；Coarse granule is put into 1300 DEG C of calcining vertical kilns
In calcined, by flint clay somehow carry out pulverization process, classification obtain calcining flint clay particle；By 300kg0 ~ 1mm, 200kg
The 180 mesh flint clay clinker fine powders and 400kg mixed clay of 1 ~ 2mm, 2 ~ 3mm of 250kg flint clay clinker particles material and 100kg
Fine powder mixing realizes that pug is kneaded；The material being kneaded is put into the press machine compression moulding of 400t, natural air drying 48h then 120
DEG C low temperature drying, then 1350 DEG C in tunnel oven, 8h sintering, 1350 DEG C of * 8h heat preservations, natural cooling is obtained novel resistance to after kiln discharge
Fiery clay brick.
Performance measurement is carried out to the novel fire-resistant clay brick according to measuring method of the present invention, as a result are as follows: fire resisting
Degree 1780,1438 DEG C, compressive resistance 50Mpa, bulk density 2.23g/cm of the soft start temperature of lotus3, the porosity 18%.
Embodiment 2
The pretreatment of flint clay raw material, sizing screening is at coarse granule and fine grained；125kg fine grained and 125kg mild-clay are mixed
It closes in uniformly investment Raymond machine and is processed into the mixed clay fine powder that granularity is 180 mesh；Coarse granule is put into 1350 DEG C of calcining vertical kilns
In calcined, by flint clay clinker carry out pulverization process, classification obtain calcining flint clay particle；By 300kg0 ~ 1mm, 200kg
1 ~ 2mm, 2 ~ 3mm of 250kg flint clay clinker particles material and the 180 mesh flint clay clinker fine powders of 150kg, 100KG180 mesh Shanxi
GL-75 high alumina fine powder is mixed with 250kg mixed clay fine powder realizes that pug is kneaded；The material being kneaded is put into the press machine of 500t
Compression moulding, natural air drying 36h then 130 DEG C of low temperature dryings, then 1400 DEG C in tunnel oven, 8h sintering, 1400 DEG C of * 8h are protected
Temperature, natural cooling obtains novel fire-resistant clay brick after kiln discharge.
Performance measurement is carried out to the clay brick according to measuring method of the present invention, as a result are as follows: refractoriness 1800, lotus
1470 DEG C, compressive resistance 65Mpa, bulk density 2.30g/cm of soft start temperature3, the porosity 17%.
Embodiment 3
The pretreatment of flint clay raw material, sizing screening is at coarse granule and fine grained；125kg fine grained and 125kg mild-clay are mixed
It closes in uniformly investment Raymond machine and is processed into the mixed clay fine powder that granularity is 180 mesh；Coarse granule is put into 1400 DEG C of calcining vertical kilns
In calcined, by flint clay clinker carry out pulverization process, classification obtain calcining flint clay particle；By 300kg0 ~ 1mm, 200kg
1 ~ 2mm, 180 mesh flint clay clinker fine powders of 2 ~ 3mm of 200kg flint clay clinker particles material and 100kg, 200 kg 180 mesh
Shanxi GL-85B high alumina fine powder is mixed with 250kg mixed clay fine powder realizes that pug is kneaded；The material being kneaded is put into 630t's
Press machine compression moulding, natural air drying 36h then 160 DEG C of low temperature dryings, then 1450 DEG C in tunnel oven, 8h sintering, 1450
DEG C * 8h heat preservation, natural cooling obtains novel fire-resistant clay brick after kiln discharge.
Performance measurement is carried out to the clay brick according to measuring method of the present invention, as a result are as follows: refractoriness 1820, lotus
1520 DEG C, compressive resistance 80Mpa, bulk density 2.35g/cm of soft start temperature3, the porosity 16%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of novel fire-resistant clay brick, it is characterised in that:
Flint clay raw material are pre-processed, sizing screening is at coarse granule and fine grained；
It is calcined coarse granule investment calcining vertical kiln to obtain flint clay clinker；
Flint clay fine grained is uniformly mixed with mild-clay, wears into mixed clay fine powder altogether；
Flint clay clinker is subjected to pulverization process, obtains varigrained flint clay clinker particles material and flint clay clinker fine powder；
The flint clay clinker particles material and flint clay clinker fine powder mixed with mixed clay fine powder realize pug be kneaded, by
Type, drying, sintering process finished product.
2. a kind of preparation method of novel fire-resistant clay brick according to claim 1, it is characterised in that: the flint clay is raw
Material pretreatment is that sieving is handled, and the coarse granule granularity is greater than 20mm, and the fine grained granularity is 0 ~ 20mm.
3. a kind of preparation method of the preparation method of novel fire-resistant clay brick according to claim 1 or 2, feature exist
In: the flint clay raw material fine grained is mass ratio 2 ~ 4:1 ~ 3 with mild-clay mixed proportion.
4. a kind of preparation method of novel fire-resistant clay brick according to claim 3, it is characterised in that: the mixed clay
Powder particle size is 130 ~ 230 mesh, is processed using Raymond machine.
5. a kind of preparation method of the preparation method of novel fire-resistant clay brick, it is characterised in that: calcine temperature in the calcining vertical kiln
Degree is 1200 ~ 1700 DEG C.
6. a kind of preparation method of the preparation method of novel fire-resistant clay brick according to claim 3, it is characterised in that: institute
Stating calcining flint clay grain graininess is 0~1mm, 1 ~ 2mm, 2 ~ 3mm, and the flint clay clinker powder particle size is 130 ~ 230 mesh, is made
Used time mass ratio is 20% ~ 30%:10% ~ 20%:15% ~ 25%:30% ~ 50%.
7. a kind of preparation method of the preparation method of novel fire-resistant clay brick according to claim 3, it is characterised in that: one
The calcining flint clay particle and flint clay clinker fine powder of certainty ratio are mixed with mixed clay fine powder 2 ~ 5:1 in mass ratio.
8. a kind of preparation method of the preparation method of novel fire-resistant clay brick according to claim 3, it is characterised in that: institute
Stating briquetting pressure is 260 ~ 1000t.
9. a kind of preparation method of the preparation method of novel fire-resistant clay brick according to claim 3, it is characterised in that: institute
Stating dry temperature is 110 ~ 160 DEG C, and the time of the drying is 12 ~ 48h.
10. a kind of preparation method of the preparation method of novel fire-resistant clay brick according to claim 3, it is characterised in that:
The temperature of the sintering is 1300 ~ 1500 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111635238A (en) * | 2020-06-23 | 2020-09-08 | 郑州凯翔耐火材料有限公司 | Low-porosity high-thermal-shock-resistance clay brick and preparation method thereof |
| CN111675546A (en) * | 2020-06-23 | 2020-09-18 | 郑州凯翔耐火材料有限公司 | Thermal shock resistant high-alumina brick and preparation method thereof |
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| CN103951448A (en) * | 2014-04-22 | 2014-07-30 | 河南鑫诚耐火材料股份有限公司 | Micro-expansive brick for carbon anode baking furnace and preparation method thereof |
| CN106187241A (en) * | 2016-07-21 | 2016-12-07 | 济源市金峰耐火材料有限公司 | Low creep high RUL refractory brick and its preparation method and application |
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| CN111635238A (en) * | 2020-06-23 | 2020-09-08 | 郑州凯翔耐火材料有限公司 | Low-porosity high-thermal-shock-resistance clay brick and preparation method thereof |
| CN111675546A (en) * | 2020-06-23 | 2020-09-18 | 郑州凯翔耐火材料有限公司 | Thermal shock resistant high-alumina brick and preparation method thereof |
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