CN101172832A - Light high-strength unburned brick - Google Patents

Light high-strength unburned brick Download PDF

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Publication number
CN101172832A
CN101172832A CNA2007101561817A CN200710156181A CN101172832A CN 101172832 A CN101172832 A CN 101172832A CN A2007101561817 A CNA2007101561817 A CN A2007101561817A CN 200710156181 A CN200710156181 A CN 200710156181A CN 101172832 A CN101172832 A CN 101172832A
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China
Prior art keywords
strength
light
percent
heat
brick
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CNA2007101561817A
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Chinese (zh)
Inventor
王家邦
王立旺
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CNA2007101561817A priority Critical patent/CN101172832A/en
Publication of CN101172832A publication Critical patent/CN101172832A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an unfired brick with light weight and high intensity. The invention contains the components in quality percent as below: 40 to 60 percent of corundum hollow ball, 30 to 45 percent of high bauxite, 8 to 15 percent of high alumina cement and 18 to 22 percent of adscititious modified sodium silicate binder. The figuration bricks and the abnormal bricks with required size are made by adopting the vibration moulding method and being dried with 110 DEG C, wherein, the cubage thickness of the samples is 1.1 to 1.5 g/cm3, the normal temperature pressure compressive strength is more than or equal to 15Mpa, and the using temperature is 1500 DEG C. The unfired brick with light weight and high intensity can be widely used in varied heat engineering devices which are needed to be heat insulated and heat preserved. The invention has the advantages of large strength, high refractability and good heat preserving as well as heat insulating capacities, thereby being able to greatly reduce the energy consumption. Moreover, the invention having convenient preparation and simple technique is useful for the cost saving.

Description

A kind of light high-strength unburned brick
Technical field
The present invention relates to refractory materials, especially relate to a kind of light high-strength unburned brick.
Background technology
Lightweight refractory is the key component of Thermal Equipment such as various kilns, and the heat-resistant light material directly contacts flame, requires not only high temperature resistant but also heat-insulating and energy-saving, and is high especially to the performance requriements of material.Exploitation lightweight, high-strength, good thermal shock stability, use temperature high energy satisfy the required material of light structures high temperature kiln, shortcomings such as the thermal capacity that changes conventional high-temperature kiln employing heavy material and exist is big, temperature rise rate is little, energy consumption is big, work-ing life is short, the construction maintenance capacity is big,, be the current problem that presses for solution better for building the service of resource-conserving and friendly environment society.
The lightweight refractory goods are generally burnt product, be useful on the middle layer of kiln wall, outer field high-alumina lightening brick, clay light cinder brick, diatomite light cinder brick etc., also be useful on mullite light cinder brick, alumina light-weight brick, alumina bubble lightweight brick of kiln wall hot-face layer etc.As the lightweight refractory goods of working lining, bear the washing away of high temperature, hot flue gas, kiln temperature lifting and the thermal stresses that produces, working conditions is very harsh.Wherein the aluminum oxide lightweight transfer to for working lining be common a kind of.The preparation method that United States Patent (USP) (patent No. 9279779) is introduced: with 50~80Wt% foamed alumina, 10~30Wt% Calcined polishing aluminum oxide, 5~20Wt% aluminium hydroxide is as raw material, burns till through 1510~1650 ℃, and can make volume density is 1.3~1.4g/cm 3, cold crushing strength is not less than the sample of 1.4MPa.Homemade alumina bubble brick, the employing alumina hollow ball is an aggregate, is powder with aluminum oxide fine powder, lapis amiridis, adds a small amount of clay or phosphate binders, through mixing, vibrate extrusion forming, dries after 1600~1750 ℃ of high temperature burn till.
Alumina hollow ball is used widely in the heat insulation field of fire resistant heat preserving, and hollow ball has utilized the big characteristics of enclosed cavity thermal resistance, good heat-insulation effect, and the intensity height, high temperature resistant, antistripping.The lightweight alumina hollow ball product has overcome that the foamed alumina product strength is low, the characteristics of high-temperature creep resistance difference, not only can directly contact flame, can also use as thermofin, this designs novel Thermal Equipment and lays a good foundation for promoting traditional hot construction equipment structure of modification.The lightweight alumina hollow ball product is an essentially consist with alumina hollow ball and micro mist, add wedding agent and adopt the vibration process for forming preparation, alumina hollow ball product is that a kind of spheroid connects network, hollow ball provides skeleton function, micro mist is filled the space, strengthen the bonding strength between the spheroid, further improve the compressive strength of goods.All need to carry out high temperature sintering in the process of preparation alumina bubble lightweight brick, so energy consumption increases greatly.
Summary of the invention
The object of the present invention is to provide a kind of light high-strength unburned brick, adopt corundum bollow ball as aggregate, reduce volume density and thermal conductivity, with the alumine powder of cheapness as the matrix material, adopt high-alumina cement and modified water glass as combined binder simultaneously, further improve the intensity of sample.
The technical scheme that the present invention solves its technical problem employing is that the quality percentage composition of each component is as follows:
Corundum bollow ball 40~60%,
Alumine 30~45%,
High-alumina cement 8~15%.
It is that 18~22% modified water glass is a wedding agent that employing adds the quality percentage composition.
Al in the described corundum bollow ball 2O 3%>96%, particle diameter are 0.2~5mm, natural tap density 0.6~0.8g/cm 3
The granularity of described alumine is 325 orders, Al 2O 3% 〉=85%.
Described high-alumina cement model is CA-50.
Described modified water glass solution quality percentage concentration is 65%, and modulus is 2.6~3, and volume density is 1.30~1.38g/cm 3
In the preparation process, alumine and high-alumina cement mix in ball mill earlier, again the modified water glass wedding agent, add in the corundum bollow ball and stir, the powder mix that adds alumine and high-alumina cement is then mixed thoroughly, moulding process adopts the vibrations pressuring method, and normal temperature leaves standstill after three days 110 ℃ of oven dry and can use after the moulding.
The beneficial effect that the present invention has is:
The light high-strength unburned brick of the present invention's preparation is high temperature resistant, antistripping, and thermal conductivity is low, and volume density is 1.1~1.5g/cm 3, cold crushing strength 〉=15MPa, can be under 1500 ℃ hot conditions life-time service.Light high-strength unburned brick can replace general refractory brick to use at a lot of positions of Thermal Equipment, compare with compact refractory material have low close lightweight, characteristics such as anti-thermal shock, thermal and insulating performance are good, low heat capacity, comparing with common lagging material and to have the compressive strength height, the refractoriness under load height, heavily burn characteristics such as linear shrinkage ratio is low, is the desirable inner lining structure material of light structures kiln.Do not need to carry out sintering in the preparation process, through just obtaining high strength after 110 ℃ of oven dry, in use further improve its intensity by sintering, can keep the different sites temperature equalisation in Thermal Equipment, using, reduce heat lost by radiation, reduce energy consumption greatly.
The light high-strength unburned brick of the present invention preparation can be widely used in the various Thermal Equipments that need heat-insulation and heat-preservation, and it is big to have intensity, the refractoriness height, characteristics such as thermal and insulating performance is good can cut down the consumption of energy greatly, and easy to prepare, technology is simple, helps saving cost.
Embodiment (being mass percent among the embodiment)
Embodiment 1:
Proportioning adopts: corundum bollow ball 40%, and alumine 45%, high-alumina cement 15% adds modified water glass solution 22%.In the preparation process, alumine and high-alumina cement mix in ball mill earlier, again water glass is added in the corundum bollow ball and stir, the powder mix that adds alumine and high-alumina cement is then mixed thoroughly, moulding process adopts the vibrations pressuring method, and normal temperature leaves standstill after three days 110 ℃ of oven dry and promptly makes sample after the moulding.
Embodiment 2:
Proportioning adopts: corundum bollow ball 60%, and alumine 30%, high-alumina cement 10% adds modified water glass solution 18%, and the preparation method is with embodiment 1.
Embodiment 3:
Proportioning adopts: corundum bollow ball 45%, and alumine 47%, high-alumina cement 8% adds modified water glass solution 21%, and the preparation method is with embodiment 1.
Embodiment 4:
Proportioning adopts: corundum bollow ball 50%, and alumine 38%, high-alumina cement 12% adds modified water glass solution 20%, and the preparation method is with example 1.
Embodiment 5:
Proportioning adopts: corundum bollow ball 55%, and alumine 35%, high-alumina cement 10% adds modified water glass solution 19%, and the preparation method is with example 1.
Embodiment performance table
Embodiment Volume density (g/cm 3) Cold crushing strength (MPa) Thermal conductivity (W/m.k) Refractoriness under load/0.2MPa (℃)
?1 ?1.48 ?22.9 ?0.60 ?1500
?2 ?1.07 ?16.9 ?0.41 ?1400
?3 ?1.39 ?24.2 ?0.56 ?1500
?4 ?1.29 ?23.5 ?0.49 ?1450
?5 ?1.17 ?17.3 ?0.45 ?1400

Claims (6)

1. light high-strength unburned brick is characterized in that the quality percentage composition of each component is as follows:
Corundum bollow ball 40~60%,
Alumine 30~45%,
High-alumina cement 8~15%.
2. according to claims 1 described a kind of light high-strength unburned brick, it is characterized in that adopting that to add the quality percentage composition be that 18~22% modified water glass is a wedding agent.
3. according to claims 1 described a kind of light high-strength unburned brick, it is characterized in that: Al in the described corundum bollow ball 2O 3%>96%, particle diameter are 0.2~5mm, natural tap density 0.6~0.8g/cm 3
4. according to claims 1 described a kind of light high-strength unburned brick, it is characterized in that: the granularity of described alumine is 325 orders, Al 2O 3% 〉=85%.
5. according to claims 1 described a kind of light high-strength unburned brick, it is characterized in that: described high-alumina cement model is CA-50.
6. according to claims 2 described a kind of light high-strength unburned bricks, it is characterized in that: described modified water glass solution quality percentage concentration is 65%, and modulus is 2.6~3, and volume density is 1.30~1.38g/cm 3
CNA2007101561817A 2007-10-23 2007-10-23 Light high-strength unburned brick Pending CN101172832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2007101561817A CN101172832A (en) 2007-10-23 2007-10-23 Light high-strength unburned brick

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007101561817A CN101172832A (en) 2007-10-23 2007-10-23 Light high-strength unburned brick

Publications (1)

Publication Number Publication Date
CN101172832A true CN101172832A (en) 2008-05-07

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863675A (en) * 2010-06-07 2010-10-20 浙江大学 High-alumina structure heat-insulation integrated composite brick and preparation method
CN103664210A (en) * 2013-12-09 2014-03-26 湖南湘钢瑞泰科技有限公司 Composite brick and preparation method thereof
CN104844127A (en) * 2015-03-30 2015-08-19 李章� Light cementing material based on vitrified micro powder, light burn-free insulating refractory composite material and preparation method therefor
CN105258510A (en) * 2015-09-30 2016-01-20 中国人民解放军总后勤部建筑工程研究所 Composite heat-preservation furnace lining and manufacturing method
CN105622114A (en) * 2015-12-21 2016-06-01 洛阳利尔耐火材料有限公司 Low-density refractory fiber coating and preparation method thereof
CN108046783A (en) * 2017-12-12 2018-05-18 浙江大学 Cordierite-corundum bollow ball saggar, preparation method and applications

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863675A (en) * 2010-06-07 2010-10-20 浙江大学 High-alumina structure heat-insulation integrated composite brick and preparation method
CN103664210A (en) * 2013-12-09 2014-03-26 湖南湘钢瑞泰科技有限公司 Composite brick and preparation method thereof
CN103664210B (en) * 2013-12-09 2015-06-10 湖南湘钢瑞泰科技有限公司 Composite brick and preparation method thereof
CN104844127A (en) * 2015-03-30 2015-08-19 李章� Light cementing material based on vitrified micro powder, light burn-free insulating refractory composite material and preparation method therefor
CN105258510A (en) * 2015-09-30 2016-01-20 中国人民解放军总后勤部建筑工程研究所 Composite heat-preservation furnace lining and manufacturing method
CN105258510B (en) * 2015-09-30 2017-10-13 中国人民解放军总后勤部建筑工程研究所 A kind of complex heat-preservation furnace lining and preparation method
CN105622114A (en) * 2015-12-21 2016-06-01 洛阳利尔耐火材料有限公司 Low-density refractory fiber coating and preparation method thereof
CN105622114B (en) * 2015-12-21 2018-06-22 洛阳利尔耐火材料有限公司 A kind of low density fire resistant fiber coating and preparation method thereof
CN108046783A (en) * 2017-12-12 2018-05-18 浙江大学 Cordierite-corundum bollow ball saggar, preparation method and applications

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