CN104557073B - High temperature kiln light fire brick - Google Patents
High temperature kiln light fire brick Download PDFInfo
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- CN104557073B CN104557073B CN201410648912.XA CN201410648912A CN104557073B CN 104557073 B CN104557073 B CN 104557073B CN 201410648912 A CN201410648912 A CN 201410648912A CN 104557073 B CN104557073 B CN 104557073B
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- slag
- clay
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- wood flour
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Abstract
The invention discloses a kind of high temperature kiln light fire brick, its feature comprises the following steps that: (1) dispensing, raw material selects sulfur ground-slag, clay, pore creating material, Alumina, sulfur ground-slag and clay ratios are 1.1～1.3, pore creating material selects wood flour and polrvinyl chloride ball compound, wood flour addition is sulfur ground-slag and the 12% of clay gross weight～14%, Alumina addition is sulfur ground-slag and the 10% of clay gross weight～15%, and polrvinyl chloride ball addition is sulfur ground-slag and the 1% of clay gross weight～2%；(2) pulverize；(3) batch mixing, uses Secondary mixing；(4) ageing mixture；(5) sintering, firing temperature uses 1400～1500 DEG C；(6) insulation, temperature retention time is 4～6h；(7) molding；(8) maintenance.Cold crushing strength of the present invention and thermal shock resistance number of times are higher, and heat conductivility is good.
Description
Technical field
The present invention relates to building material field, particularly to the preparation method of high temperature kiln light fire brick.
Background technology
Industrial Stoves energy resource consumption is serious, and the heat loss of kiln typically accounts for the 24%～25% of fuel consumption.Tradition work
Industry stove is the purpose reaching heat preservation energy-saving, generally in heavy refractory brick marshalling or the external increasing of construction of heavy unshape refractory
Add heat-insulation layer.Insulation material Applicable temperature owing to using is relatively low, and the use on medium and high temperature industrial furnace is limited greatly
System, and the kiln of heavy laying fireproof bricks is bulky, heavy.
Summary of the invention
The technical problem to be solved is to provide a kind of light fire brick that can be applicable to high temperature kiln
Preparation method, light fire brick prepared by the method has the features such as low-density, low heat conductivity, excellent thermal insulation performance.
To this end, the preparation method of the high temperature kiln light fire brick of present invention offer comprises the following steps:
(1) dispensing
Raw material selects sulfur ground-slag, clay, pore creating material, Alumina, and sulfur ground-slag and clay ratios are 1.1～1.3, pore creating material
Selecting wood flour and polrvinyl chloride ball compound, wood flour addition is sulfur ground-slag and the 12% of clay gross weight～14%, and Alumina adds
Entering amount is sulfur ground-slag and the 10% of clay gross weight～15%, and polrvinyl chloride ball addition is sulfur ground-slag and clay gross weight
1%～2%；
(2) pulverize
Using double-roll crusher sulfur residue to be pulverized, then wear into Cosan with ball mill, and sieve, Cosan is thin
Degree is 325 mesh, and wood flour and polrvinyl chloride ball Raymond mill are levigate and sieve, and wood flour fineness is less than 1mm, and polrvinyl chloride ball fineness is little
In 2mm；
(3) batch mixing
Using Secondary mixing, mixing time is 2～3min for the first time, and rotating speed is 80～120r/min, is subsequently adding
10%～12% water is allowed to be mixed into plastic shape, and mixing time is 3～4min for the second time, and rotating speed is 150～210r/min；
(4) ageing mixture
Ageing mixture is carried out in ageing mixture storehouse, and the ageing mixture time is 7～9h, and ageing mixture equipment uses reversible moving formula distributing device；
(5) sintering
Firing temperature uses 1400～1500 DEG C, and optimum temperature is 1450 DEG C；
(6) insulation
Temperature retention time is 4～6h；
(7) molding
Molding uses semi-hard plastic double-stage vacuum extruding machine, and briquetting pressure is 10MPa, a size of 240mm × 115mm × 90mm
Or 390mm × 190mm × 190mm.
(8) maintenance
At room temperature maintenance 48h.
The room temperature of the light fire brick of the preparation method manufacture of the high temperature kiln light fire brick of present invention offer is provided
Compressive resistance and thermal shock resistance number of times are higher, and heat conductivility is good.
Detailed description of the invention
The embodiment of the preparation method of the high temperature kiln light fire brick that the present invention provides comprises the following steps:
(1) dispensing
Raw material selects sulfur ground-slag, clay, pore creating material, Alumina.Sulfur ground-slag and clay ratios are 1.2, wood flour addition
For sulfur ground-slag and the 13% of clay gross weight, polrvinyl chloride ball addition is sulfur ground-slag and the 1.5% of clay gross weight, and Alumina adds
Entering amount is sulfur ground-slag and the 12% of clay gross weight.
Pore creating material kind and granularity have considerable influence to goods physical property, and wood flour is mainly by needle-like or the fibre of column
Dimension composition, polrvinyl chloride ball is spheroidal particle.Therefore wood flour leaves the irregular hole of pin, column after burning, and polrvinyl chloride ball
Leave the hole of spheroidal.Polrvinyl chloride ball is less due to unit weight, after addition polrvinyl chloride ball is more beneficial for reducing goods burning
Bulk density, dry shrinkage is little, and after molding, base substrate water content is low, and goods drying distortions is little, and finished size is accurate.It addition, wood flour
Hygroscopic, the beneficially transmission of moisture content and absorption, and easily burn mistake, and polrvinyl chloride ball water absorption is poor, but be unlikely to deform after burning,
The two is used in mixed way and can prevent adobe from ftractureing after burning.
From knowable to the reaction that clay and sulfur ground-slag occur heating process, occur the main cause of volume contraction be by
Burning in pore creating material is lost, clay is dehydrated in sintering process, decomposes, chemical combination and densified sintering product thereof.But along with sulfur ground-slag
With the increase of clay ratios, the SiO that enough sulfur ground-slags decompose with clay2Fully reaction generates mullite, and mullite generates
Amount the most, offset volume contraction amount the biggest；But sulfur ground-slag addition is too much, and sulfur ground-slag can promote the further of goods
Sintering, makes shrink of product increase again, and after burning, intensity can increase with the increase of sulfur ground-slag addition, and when 1.1, intensity reaches
Maximum；But when the two ratio is more than 1.3, owing to sulfur ground-slag too much causes goods to make burning after-contraction increase.Therefore sulfur
The ratio of ground-slag/clay is optimal between 1.1～1.3.
The addition suitably increasing Alumina can improve the thermal shock resistance of goods, the mineral composition that Alumina is main
For corundum, mullite, quartz and a small amount of glass phase, owing to mullite is the mineral facies of a kind of low thermal expansion, its pillar-shaped crystal exists
Microstructure is formed in the framing structure intersected, beneficially thermal shock resistance and the raising of intensity.Alumina addition is the most, high
The lower mullite of temperature generates the most the more, and meanwhile, quartz is conducive to increasing the viscosity of liquid mutually, improves creep resistance under goods high temperature
Energy and thermal shock resistance.It addition, the addition of Alumina advantageously reduces the cost of goods and strengthens sintering character, owing to high temperature burns till
Rear generation mullite, mullite expands and counteracts the contraction caused after product part burns, can reduce burning in appropriate scope
After bulk density with burn after linear shrinkage.
(2) pulverize
Using double-roll crusher sulfur residue to be pulverized, then wear into Cosan with ball mill, and sieve, Cosan is thin
Degree is 325 mesh；Wood flour and polrvinyl chloride ball Raymond mill are levigate and sieve, and wood flour fineness is less than 1mm；Polrvinyl chloride ball fineness is little
In 2mm.
The granularity of sulfur ground-slag is the biggest, and specific surface area is the least, and sintering contact area is little, affects solid-phase sintering speed.Sulfur
The granularity of ground-slag is the thinnest, and specific surface area is the biggest, and reaction activity strengthens, and is more beneficial for sulfur ground-slag and decomposites amorphous with clay
SiO2Generate mullite, and owing to the expansion of mullite counteracts because interior tissue sinters the contraction caused.
(3) batch mixing
Using Secondary mixing, mixing time is 2～3min for the first time, and rotating speed is 80～120r/min, is subsequently adding
10%～12% water is allowed to be mixed into plastic shape；Mixing time is 3～4min for the second time, and rotating speed is 150～210r/min.Because of thing
Material light weight, should use forced stirrer just can make material mix homogeneously, increase degree of compaction, create conditions to molding.Mixing time
Also moulding moisture and Forming Quality are affected.
(4) ageing mixture
Ageing mixture is carried out in ageing mixture storehouse, and the optimal ageing mixture time is 8h, and ageing mixture equipment uses reversible moving formula distributing device.
Ageing mixture has following effect: one is by adding water, make compound in banking process, by capillary tube and vapour pressure
Effect, makes the moisture distribution in compound more uniform；Two are the abundant aquations of granule of binding material and carry out ion exchange, thus
Improve the plasticity of material；Three content being to increase humic acid substance, improve mud material forming performance.Ageing mixture can increase plasticity,
Improve mobility and the caking property of raw material, make shaping block surface smooth.
(5) sintering
Table 1 is the firing temperature impact on brick physical property, reflects the rising along with firing temperature in table, and apparent porosity increases
Greatly, but bulk density with burn after linear shrinkage reduce, in the case of 1450 DEG C brick bulk density with burn after linear shrinkage and 1500 DEG C of situations
After lower brick bulk density and burning, linear shrinkage fluctuation is little, and in the case of 1450 DEG C, intensity is the highest；The growing amount of mullite with netted group
Knit the most obvious.Consider physical property, industry manufacturing cost and meet the design requirement of product, optimum burning temperature-forming
It it is 1450 DEG C.
The impact on brick physical property of table 1 firing temperature
(6) insulation
Table 2 is the temperature retention time impact on brick physical property, and in table 2, firing temperature is 1450 DEG C.In table during reflection insulation
Between the longest, apparent porosity is the least, and bulk density is the biggest, finer and close inside goods.Suitably increase temperature retention time, be conducive to solid
Complete further with liquid reactive, make sample reach preferably and sinter.Optimal temperature retention time is 5h.
The impact on brick physical property of table 2 temperature retention time
(7) molding
Molding uses semi-hard plastic double-stage vacuum extruding machine, and briquetting pressure is 10MPa, a size of 240mm × 115mm × 90mm
Or 390mm × 190mm × 190mm.
(8) maintenance
At room temperature maintenance 48h.
Testing light fire brick in embodiment, light fire brick physical property is as shown in table 3.Table shows high temperature
Kiln light fire brick cold crushing strength and thermal shock resistance number of times are higher, and heat conductivility is good.
The physical property of table 3 light fire brick
Claims (3)
1. high temperature kiln light fire brick, its feature comprises the following steps that:
(1) dispensing
Raw material selects sulfur ground-slag, clay, pore creating material, Alumina, and sulfur ground-slag and clay ratios are 1.1～1.3, and pore creating material is selected
Wood flour and polrvinyl chloride ball compound, wood flour addition is sulfur ground-slag and the 12% of clay gross weight～14%, Alumina addition
For sulfur ground-slag and the 10% of clay gross weight～15%, polrvinyl chloride ball addition be sulfur ground-slag and the 1% of clay gross weight～
2%；
(2) pulverize
Using double-roll crusher sulfur residue to be pulverized, then wear into Cosan with ball mill, and sieve, Cosan fineness is
325 mesh, wood flour and polrvinyl chloride ball Raymond mill are levigate and sieve, and wood flour fineness is less than 1mm, and polrvinyl chloride ball fineness is less than
2mm；
(3) batch mixing
Using Secondary mixing, mixing time is 2～3min for the first time, and rotating speed is 80～120r/min, is subsequently adding 10%
～12% water be allowed to be mixed into plastic shape, mixing time is 3～4min for the second time, and rotating speed is 150～210r/min；
(4) ageing mixture
Ageing mixture is carried out in ageing mixture storehouse, and the ageing mixture time is 7～9h, and ageing mixture equipment uses reversible moving formula distributing device；
(5) sintering
Firing temperature uses 1400～1500 DEG C；
(6) insulation
Temperature retention time is 4～6h；
(7) molding
Molding use semi-hard plastic double-stage vacuum extruding machine, briquetting pressure is 10MPa, a size of 240mm × 115mm × 90mm or
390mm×190mm×190mm；
(8) maintenance
At room temperature maintenance 48h.
2., according to the high temperature kiln light fire brick described in claim 1, it is characterized in that firing temperature is 1450 DEG C.
3., according to the high temperature kiln light fire brick described in claim 1, it is characterized in that temperature retention time is 5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648912.XA CN104557073B (en) | 2014-10-24 | 2014-10-24 | High temperature kiln light fire brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648912.XA CN104557073B (en) | 2014-10-24 | 2014-10-24 | High temperature kiln light fire brick |
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| Publication Number | Publication Date |
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| CN104557073A CN104557073A (en) | 2015-04-29 |
| CN104557073B true CN104557073B (en) | 2016-08-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069253A (en) * | 1992-07-28 | 1993-02-24 | 韩峰 | The pyrite slag prescription of baking bricks |
| CN101786844A (en) * | 2010-01-25 | 2010-07-28 | 厦门三荣陶瓷开发有限公司 | Light heat-preserving brick and fabrication method thereof |
| CN102285788A (en) * | 2011-06-17 | 2011-12-21 | 云南常青树投资有限公司 | Method for preparing electroconductive ceramic product from pyrite cinder |
| CN103159492A (en) * | 2013-04-17 | 2013-06-19 | 成都理工大学 | Method for preparing self-siliceous refractory material by utilizing pyrite tailing as raw material |
-
2014
- 2014-10-24 CN CN201410648912.XA patent/CN104557073B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069253A (en) * | 1992-07-28 | 1993-02-24 | 韩峰 | The pyrite slag prescription of baking bricks |
| CN101786844A (en) * | 2010-01-25 | 2010-07-28 | 厦门三荣陶瓷开发有限公司 | Light heat-preserving brick and fabrication method thereof |
| CN102285788A (en) * | 2011-06-17 | 2011-12-21 | 云南常青树投资有限公司 | Method for preparing electroconductive ceramic product from pyrite cinder |
| CN103159492A (en) * | 2013-04-17 | 2013-06-19 | 成都理工大学 | Method for preparing self-siliceous refractory material by utilizing pyrite tailing as raw material |
Non-Patent Citations (1)
| Title |
|---|
| 耐火隔热陶粒混凝土及其制品的性能和应用;范锦忠;《砖瓦》;20101231(第10期);41-44 * |
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Effective date of registration: 20181212 Address after: 063021 Kaifeng Road, Kaiping District, Tangshan City, Hebei Province, 4 km Patentee after: Majiagou Refractories Factory, Kaiping District, Tangshan City Address before: 325000 Third Floor, Natural Home D8, Tangjiaqiao South Road, Lucheng District, Wenzhou City, Zhejiang Province Patentee before: Ye Xiangfei |
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