CN104140233A - A 1200 DEG C grade low-iron thermally-insulating castable used for industrial furnaces and a preparing method thereof - Google Patents
A 1200 DEG C grade low-iron thermally-insulating castable used for industrial furnaces and a preparing method thereof Download PDFInfo
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- CN104140233A CN104140233A CN201310163782.6A CN201310163782A CN104140233A CN 104140233 A CN104140233 A CN 104140233A CN 201310163782 A CN201310163782 A CN 201310163782A CN 104140233 A CN104140233 A CN 104140233A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
A 1200 DEG C grade low-iron thermally-insulating castable used for industrial furnaces and a preparing method thereof are disclosed. The castable is prepared by mixing following components by weight: 40-60% of light mullite thermally-insulating brick particles, 3-8% of expanded perlite, 5-15% of floating beads, 31-36% of pure calcium aluminate cement, 3-8% of silica powder and 0.1-0.5% of a water reducer. The method includes stirring and uniformly mixing the components according to the ratio to obtain the low-iron thermally-insulating castable. The low-iron thermally-insulating castable has characteristics of volume density smaller than 1000 kg/m<3>, low thermal conductivity, high strength, and good thermal insulation effects.
Description
Technical field
The present invention relates to industrial furnace field, furtherly, relate to a kind of low iron heat insulating casting material of 1200 DEG C of levels and preparation method used for industrial furnace.
Background technology
The energy is the important substance basis that human society is depended on for existence and development.In recent years, China's energy demand is accelerated growth trend, but energy utilization rate is very low.Along with industrialization, Development of China's Urbanization are constantly accelerated, energy supply and demand contradiction will be more outstanding, and will seriously restrict China's socio-economic development.
As the main energy consumption equipment in high energy consumption industry production, industrial furnace is wanted the very huge energy of quantity consumed every year.The for example ethane cracking furnace in ethylene industry, its energy consumption accounts for 40% of whole ethylene unit total energy consumption, and the energy consumption that reduces pyrolyzer is one of important channel reducing production cost of ethylene.
Traditional industrial furnace is the object that reaches heat preservation energy-saving, conventionally in or beyond heavy laying fireproof bricks body or heavy unshape refractory construction body, increase thermal insulation layer, but heavy layer has strengthened bulky industrial furnace to bear a heavy burden, for batch furnace, accumulation of heat loss is large especially.
Therefore, finding a kind of novel industrial furnace lagging material and reduce energy consumption, is current problem demanding prompt solution.
Summary of the invention
For solving problems of the prior art, the invention provides a kind of low iron heat insulating casting material of 1200 DEG C of levels and preparation method used for industrial furnace.Mould material volume density of the present invention is not more than 1000kg/m
3, thermal conductivity is low, intensity is high, high insulating effect.
One of object of the present invention is to provide a kind of low iron heat insulating casting material of 1200 DEG C of levels used for industrial furnace.
By comprising that following component by weight percentage mixes:
The volume density of lightweight mullite heat insulating brick particle is 500～800kg/m
3.Particle size range is between 0.2～6mm, and lightweight mullite heat insulating brick particle preparation: adopting the lightweight mullite heat insulating brick scrap stock of high-quality is raw material, through broken, sieves, and packs for subsequent use after classification.
The particle size range of described pearlstone is between 0.15～2.5mm;
Described water reducer is at least one in tripoly phosphate sodium STPP, high dense naphthalenesulfonate high efficiency water reducing agent and Sodium hexametaphosphate 99.
Float pearl and refer to the coal fly ash hollow micro bead that can float on the surface;
Silicon powder is commonly called as silicon ash, silicon powder is noncrystalline silicon-dioxide, the SiO2 that produces in the time of smelting ferrosilicon and industrial silicon and Si gas and airborne oxygen oxidation condensation and the ultra-fine siliceous powder body material of one that forms rapidly, particle diameter require 45um tail over≤5%).
Two of object of the present invention is to provide a kind of preparation method of 1200 DEG C of low iron heat insulating casting materials of level used for industrial furnace.
Comprise:
Described component is uniformly mixed and makes described low iron heat insulating casting material by described consumption.
Specifically comprise the following steps:
1) by lightweight mullite heat insulating brick particle, pearlstone, float pearl and carry out prebake processing;
2) pure calcium aluminate cement, silicon powder, water reducer pre-mixing are evenly made to premix; Then with lightweight mullite heat insulating brick particle, pearlstone, float pearl and mix
Can be by the following technical solutions:
First carry out starting material apolegamy, adopting lightweight mullite heat insulating brick particle, pearlstone, floating pearl is aggregate, taking pure calcium aluminate cement and silicon powder as matrix composition, and adds tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 and NF as water reducer and dispersion agent.
After raw material is selected, its preparation technology is: first by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of aggregates of pearl and carry out prebake processing, remove the moisture of the inside; Then in the agravic dry-mixed machine of duplex, put into pure calcium aluminate cement, silicon powder, tripoly phosphate sodium STPP and high dense naphthalenesulfonate high efficiency water reducing agent (NF), premix A is evenly made in pre-mixing; Finally in V-mixer by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of aggregates of pearl and premix A is mixed together evenly, after pack sealing, complete.
In job location, whole bag material is all put into stirrer, add water and stir 3～5 minutes, the material being stirred being poured into mould is afterwards position to be cast, or directly smears construction.After natural curing 48 hours, can carry out baking processing.
Compared with the O level heat insulating casting material of the novel low iron heat insulating casting material of 1200 DEG C of levels of preparing by the inventive method and traditional suitable density, make full use of the lightweight mullite heat insulating brick particle of high-quality, reduce the iron-holder in mould material, measure according to GB/T6609.4-2004, iron level≤1.5%, the reduction of iron level is conducive to improve maximum operation (service) temperature and the resistance to corrosion of mould material, thereby extends its life cycle.
110 DEG C of * 24h of the novel low iron heat insulating casting material of 1200 DEG C of levels of preparation are dried volume density and are not more than 1000kg/m
3, 1200 DEG C of maximum operation (service) temperatures, with 1040 DEG C high 160 DEG C of the maximum operation (service) temperatures of traditional O level heat insulating casting material, have effectively improved the safety in utilization of material.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention.
Raw materials used in embodiment:
Lightweight mullite heat insulating brick particle: formed by lightweight mullite heat insulating brick fragmentation.Adopt the TJM series lightweight mullite heat insulating brick fragmentation that Yixing Mogenre Ceramic Co., Ltd. produces to form.Particle size range is between 0.2～6mm, and the volume density of lightweight mullite heat insulating brick particle is 500～800kg/m
3.
Pearlstone: a kind of natural acidic glassiness slag nonmetallic minerals, because its volume under 1000～1300 DEG C of hot conditionss expands 4～30 times rapidly, therefore be referred to as pearlstone.Manufacturer: KD Xinyang New Materials Co., Ltd., the trade mark is for No. 100 that tap density is 100kg/m3 to the maximum.Particle size range is between 0.15～2.5mm.
Float pearl: the contained hollow granulated glass sphere that can float in the water surface in the flyash in fuel-burning power plant.Pearl is floated in the triumph of Handan, Hebei, and trade mark lightweight is floated pearl, below unit weight 500kg/m3.
Pure calcium aluminate cement: be to form the hydraulicity bonding agent in 70-80% left and right with the content of aluminum oxide with high-purity calcium oxide and aluminum oxide through high temperature sintering.Manufacturer: Kai Nuosi (China) trade mark SECAR-71 of aluminate Technology Co., Ltd.
Silicon powder: SILICA FUME is noncrystalline silicon-dioxide is SiO2 and Si gas and the rapid ultra-fine siliceous powder body material of one that is oxidized also condensation and form of airborne oxygen producing in the time of smelting ferrosilicon and industrial silicon.Manufacturer: Anshan trade Industrial Co., Ltd. of the saddle U.S., the trade mark 92 silicon powders.
Tripoly phosphate sodium STPP: commercially available
NF: commercially available
Sodium hexametaphosphate 99: commercially available
Embodiment 1:
First by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of aggregates of pearl and carry out prebake processing; Then in the agravic dry-mixed machine of duplex, put into pure calcium aluminate cement, silicon powder, tripoly phosphate sodium STPP and NF, premix A is evenly made in pre-mixing; Finally in V-mixer by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of prebake aggregates of pearl and premix A is mixed together evenly, after pack sealing, complete.Each amounts of components is in table 1.
According to refractory materials volume density test method YB/T5200, recording 110 DEG C of * 24h oven dry volume densities is 980kg/m
3, be better than traditional O level heat insulating casting material prescribed value 1040kg/m
3.
According to refractory materials cold crushing strength test method YB/T5201, recording cold crushing strength is 3.0Mpa, is better than traditional O level heat insulating casting material prescribed value 1.4Mpa.
According to refractory materials strength at normal temperature test method YB/T5201, recording strength at normal temperature is 1.0Mpa, is better than traditional O level heat insulating casting material prescribed value 0.8Mpa.
According to the reversible thermal expansion of refractory materials (from non-heated condition to 1040 DEG C of O level maximum operation (service) temperatures) test method YB/T5205, record reversible polar expansion 0.38%, be better than traditional O level heat insulating casting material prescribed value 0.4%.
Change test method YB/T5203 according to refractory materials permanent line, record 1040 DEG C of * 5h sample permanent lines and change-1.0%, be better than traditional O level heat insulating casting material prescribed value-1.5%.
Thermal conductivity is according to Refractory Thermal Conductivity test method (discharge flat band method) YB/4130-2005, recording the thermal conductivity of 200 DEG C is 0.2W/ (mK), the thermal conductivity of 425 DEG C is 0.24W/ (mK), the thermal conductivity of 650 DEG C is 0.27W/ (mK), is all better than thermal conductivity 0.217W/ (mK), the thermal conductivity 0.256W/ (mK) of 425 DEG C of 200 DEG C and the thermal conductivity 0.27W/ (mK) of 650 DEG C in traditional O level heat insulating casting material.
Test data is in table 2.
Embodiment 2:
First by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of aggregates of pearl and carry out prebake processing; Then in the agravic dry-mixed machine of duplex, put into pure calcium aluminate cement, silicon powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, premix A is evenly made in pre-mixing; Finally in V-mixer by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of prebake aggregates of pearl and premix A is mixed together evenly, after pack sealing, complete.Each amounts of components is in table 1.
According to refractory materials volume density test method YB/T5200, recording 110 DEG C of * 24h oven dry volume densities is 1000kg/m
3, be better than traditional O level heat insulating casting material prescribed value 1040kg/m
3.
According to refractory materials cold crushing strength test method YB/T5201, recording cold crushing strength is 2.5Mpa, is better than traditional O level heat insulating casting material prescribed value 1.4Mpa.
According to refractory materials strength at normal temperature test method YB/T5201, recording strength at normal temperature is 0.9Mpa, is better than traditional O level heat insulating casting material prescribed value 0.8Mpa.
According to the reversible thermal expansion of refractory materials (from non-heated condition to 1040 DEG C of O level maximum operation (service) temperatures) test method YB/T5205, record reversible polar expansion 0.38%, be better than traditional O level heat insulating casting material prescribed value 0.4%.
Change test method YB/T5203 according to refractory materials permanent line, record 1040 DEG C of * 5h sample permanent lines and change-0.7%, be better than traditional O level heat insulating casting material prescribed value-1.5%.
Thermal conductivity is according to Refractory Thermal Conductivity test method (discharge flat band method) YB/4130-2005, recording the thermal conductivity of 200 DEG C is 0.21W/ (mK), the thermal conductivity of 425 DEG C is 0.25W/ (mK), the thermal conductivity of 650 DEG C is 0.26W/ (mK), is all better than thermal conductivity 0.217W/ (mK), the thermal conductivity 0.256W/ (mK) of 425 DEG C of 200 DEG C and the thermal conductivity 0.27W/ (mK) of 650 DEG C in traditional O level heat insulating casting material.
Test data is in table 2.
Embodiment 3:
First by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of aggregates of pearl and carry out prebake processing; Then in the agravic dry-mixed machine of duplex, put into pure calcium aluminate cement, silicon powder, tripoly phosphate sodium STPP and NF, premix A is evenly made in pre-mixing; Finally in V-mixer by lightweight mullite heat insulating brick particle, pearlstone, float three kinds of prebake aggregates of pearl and premix A is mixed together evenly, after pack sealing, complete.Each amounts of components is in table 1.
According to refractory materials volume density test method YB/T5200, recording 110 DEG C of * 24h oven dry volume densities is 960kg/m
3, be better than traditional O level heat insulating casting material prescribed value 1040kg/m
3.
According to refractory materials cold crushing strength test method YB/T5201, recording cold crushing strength is 3.3Mpa, is better than traditional O level heat insulating casting material prescribed value 1.4Mpa.
According to refractory materials strength at normal temperature test method YB/T5201, recording strength at normal temperature is 1.1Mpa, is better than traditional O level heat insulating casting material prescribed value 0.8Mpa.
According to the reversible thermal expansion of refractory materials (from non-heated condition to 1040 DEG C of O level maximum operation (service) temperatures) test method YB/T5205, record reversible polar expansion 0.36%, be better than traditional O level heat insulating casting material prescribed value 0.4%.
Change test method YB/T5203 according to refractory materials permanent line, record 1040 DEG C of * 5h sample permanent lines and change-1.2%, be better than traditional O level heat insulating casting material prescribed value-1.5%.
Thermal conductivity is according to Refractory Thermal Conductivity test method (discharge flat band method) YB/4130-2005, recording the thermal conductivity of 200 DEG C is 0.19W/ (mK), the thermal conductivity of 425 DEG C is 0.22W/ (mK), the thermal conductivity of 650 DEG C is 0.24W/ (mK), is all better than thermal conductivity 0.217W/ (mK), the thermal conductivity 0.256W/ (mK) of 425 DEG C of 200 DEG C and the thermal conductivity 0.27W/ (mK) of 650 DEG C in traditional O level heat insulating casting material.
Test data is in table 2.
Table 1(by weight percentage)
Table 2
Claims (3)
1. the low iron heat insulating casting material of 1200 DEG C of levels used for industrial furnace, is characterized in that described heat insulating casting material is by comprising that following component by weight percentage mixes:
The particle size range of described lightweight mullite heat insulating brick particle is between 0.2～6mm; Density is 500～800kg/m
3
The particle size range of described pearlstone is between 0.15～2.5mm;
Described water reducer is at least one in tripoly phosphate sodium STPP, high dense naphthalenesulfonate high efficiency water reducing agent and Sodium hexametaphosphate 99.
2. a preparation method for 1200 DEG C of low iron heat insulating casting materials of level used for industrial furnace as claimed in claim 1, is characterized in that described method comprises:
Described component is uniformly mixed and makes described low iron heat insulating casting material by described consumption.
3. preparation method as claimed in claim 2, is characterized in that described method comprises:
1) by lightweight mullite heat insulating brick particle, pearlstone, float pearl and carry out prebake processing;
2) pure calcium aluminate cement, silicon powder, water reducer pre-mixing are evenly made to premix; Then with lightweight mullite heat insulating brick particle, pearlstone, float pearl and mix.
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Cited By (4)
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|---|---|---|---|---|
| CN105237001A (en) * | 2015-09-24 | 2016-01-13 | 武汉科技大学 | Coke dry quenching furnace castable used for in-suit generation of aluminium nitride, and preparation method thereof |
| CN113149673A (en) * | 2021-05-08 | 2021-07-23 | 泰兴市恒信特种耐火材料有限公司 | Aluminum-silicon castable added with sinking beads and preparation method thereof |
| CN113185309A (en) * | 2021-05-08 | 2021-07-30 | 泰兴市恒信特种耐火材料有限公司 | Aluminum-silicon castable added with silica micropowder and preparation method thereof |
| CN113681675A (en) * | 2021-08-26 | 2021-11-23 | 北京工业大学 | Preparation method of electromagnetic transmission type high-alumina cement-based material with double-layer structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105237001A (en) * | 2015-09-24 | 2016-01-13 | 武汉科技大学 | Coke dry quenching furnace castable used for in-suit generation of aluminium nitride, and preparation method thereof |
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| CN113149673A (en) * | 2021-05-08 | 2021-07-23 | 泰兴市恒信特种耐火材料有限公司 | Aluminum-silicon castable added with sinking beads and preparation method thereof |
| CN113185309A (en) * | 2021-05-08 | 2021-07-30 | 泰兴市恒信特种耐火材料有限公司 | Aluminum-silicon castable added with silica micropowder and preparation method thereof |
| CN113681675A (en) * | 2021-08-26 | 2021-11-23 | 北京工业大学 | Preparation method of electromagnetic transmission type high-alumina cement-based material with double-layer structure |
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