CN104140273B - A kind of low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace and preparation method - Google Patents
A kind of low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace and preparation method Download PDFInfo
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- CN104140273B CN104140273B CN201310163633.XA CN201310163633A CN104140273B CN 104140273 B CN104140273 B CN 104140273B CN 201310163633 A CN201310163633 A CN 201310163633A CN 104140273 B CN104140273 B CN 104140273B
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Abstract
The invention discloses a kind of low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace and preparation method, described heat insulating casting material is mixed by the following component comprised by weight percentage: lightweight mullite heat insulating brick particle 30 ~ 50%; Pearlstone 3 ~ 15%; Drift pearl 5 ~ 20%; Pure calcium aluminate cement 35 ~ 55%; Silicon powder 3 ~ 8%; Water reducer 0.1 ~ 0.5%.Method comprises: described component is uniformly mixed obtained described low iron heat insulating casting material by described consumption.Heat insulating casting material of the present invention and common heat insulating casting material have that use temperature is high, normal temperature and the feature such as hot strength is high, thermal conductivity is low, good effect of heat insulation, resistance to corrosion are strong, for energy-saving and emission-reduction, reduce industrial furnace running cost, improve industrial furnace thermo-efficiency significant.
Description
Technical field
The present invention relates to industrial furnace field, furtherly, relate to a kind of low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace and preparation method.
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, the energy that industrial furnace wants quantity consumed very huge every year.Such as, ethane cracking furnace in ethylene industry, its energy consumption accounts for 40% of whole ethylene unit total energy consumption, and the energy consumption reducing pyrolyzer is one of important channel reducing production cost of ethylene.
Traditional industrial furnace is the object reaching heat preservation energy-saving, usually in or beyond heavy laying fireproof bricks body or heavy unshape refractory construction body, thermal insulation layer is increased, but heavy layer increases 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 to 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 1100 DEG C of levels used for industrial furnace and preparation method.Mould material volume density of the present invention is at 830kg/m
3below, thermal conductivity is low, intensity is high, high insulating effect.
An object of the present invention is to provide a kind of low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace.
Be uniformly mixed by the following component comprised by weight percentage to form:
The density of described lightweight mullite heat insulating brick particle is 500 ~ 800kg/m
3.Particle size range is between 0.2 ~ 6mm, prepared by lightweight mullite heat insulating brick particle: the lightweight mullite heat insulating brick scrap stock adopting high-quality are raw material, through fragmentation, sieve, pack 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.
Drift pearl refers 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 non-crystalline silica, being oxygen rapid oxidation in SiO2 and the Si gas and air produced when smelting ferrosilicon and industrial silicon and condensation and the ultra-fine siliceous powder body material of one formed, Particle size requirements 45um tails over≤and 5%).
Two of object of the present invention is to provide a kind of preparation method of the low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace.
Comprise:
Described component is uniformly mixed obtained described low iron heat insulating casting material by described consumption.
Specifically comprise the following steps:
1) lightweight mullite heat insulating brick particle, pearlstone, drift pearl are carried out prebake process;
2) pure calcium aluminate cement, silicon powder, water reducer pre-mixing are evenly made premix; Then mix with lightweight mullite heat insulating brick particle, pearlstone, drift pearl.
Can by the following technical solutions:
After raw material is selected, its preparation technology is: first lightweight mullite heat insulating brick particle, pearlstone, drift pearl three kinds of aggregates are carried out prebake process, the moisture of removing the inside; Then in the agravic dry-mixed machine of duplex, put into the dense naphthalenesulfonate high efficiency water reducing agent (NF) of pure calcium aluminate cement, silicon powder, tripoly phosphate sodium STPP and height, pre-mixing evenly makes premix; Finally in V-mixer, lightweight mullite heat insulating brick particle, pearlstone, drift pearl three kinds of aggregates and premix are mixed together evenly, namely complete after pack sealing.
In job location, whole bag material is all put into stirrer, add water stirring 3 ~ 5 minutes, pours the material be stirred into mould and position to be cast afterwards, or directly smear construction.Natural curing, after 48 hours, can carry out baking processing.
The novel low iron heat insulating casting material of the 1100 DEG C of levels prepared by the inventive method is compared with the N level heat insulating casting material of 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 the maximum operation (service) temperature and the resistance to corrosion that improve mould material, thus extends its life cycle.
It is below 830kg/m3 that the novel low iron heat insulating casting material of 1100 DEG C of levels 110 DEG C of * 24h of preparation dry volume density, maximum operation (service) temperature 1100 DEG C, high 175 DEG C with the maximum operation (service) temperature 925 DEG C of traditional N level heat insulating casting material, effectively improve 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 (0.2 ~ 6): formed by lightweight mullite heat insulating brick fragmentation.The TJM series lightweight mullite heat insulating brick fragmentation adopting Yixing Mogenre Ceramic Co., Ltd. to produce forms.
Pearlstone: a kind of natural acidic glassiness slag nonmetallic minerals, due to its rapid spatial expansion 4 ~ 30 times under 1000 ~ 1300 DEG C of hot conditionss, therefore is referred to as pearlstone.Manufacturer: KD Xinyang New Materials Co., Ltd., No. 100, the trade mark i.e. tap density is 100kg/m3 to the maximum.Particle size range is between 0.15 ~ 2.5mm.
Drift pearl: the hollow granulated glass sphere that can float in the water surface contained in the flyash in fuel-burning power plant.Pearl is floated in the triumph of Handan, Hebei, trade mark lightweight drift pearl, below unit weight 500kg/m3.
Pure calcium aluminate cement: be form with the hydraulicity bonding agent of the content of aluminum oxide at about 70-80% through high temperature sintering with high-purity calcium oxide and aluminum oxide.Manufacturer: Kai Nuosi (China) aluminate Technology Co., Ltd. trade mark SECAR-71
Silicon powder: SILICA FUME is non-crystalline silica, is oxygen rapid oxidation in SiO2 and the Si gas and air produced when smelting ferrosilicon and industrial silicon and condensation and the ultra-fine siliceous powder body material of one formed.Manufacturer: Anshan trade Industrial Co., Ltd. of the saddle U.S., the trade mark 92 silicon powder.
Tripoly phosphate sodium STPP: commercially available
NF: commercially available
Sodium hexametaphosphate 99: commercially available
Embodiment 1:
First lightweight mullite heat insulating brick particle, pearlstone, drift pearl three kinds of aggregates are carried out prebake process; 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, lightweight mullite heat insulating brick particle, pearlstone, drift pearl three kinds of prebake aggregates and premix A are mixed together evenly, namely complete after pack sealing.
According to refractory materials cold crushing strength test method YB/T5201, recording cold crushing strength is 3.0Mpa, is better than traditional N 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 N level heat insulating casting material prescribed value 0.8Mpa.
According to the reversible thermal expansion of refractory materials (from non-heated state to N level maximum operation (service) temperature 925 DEG C) test method YB/T5205, record reversible polar expansion 0.38%, be better than traditional N level heat insulating casting material prescribed value 0.4%.
According to refractory materials permanent line change test method YB/T5203, record 925 DEG C of * 5h sample permanent line changes-1.0%, be better than traditional N 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, the thermal conductivity recorded at 200 DEG C is 0.18W/ (mK), the thermal conductivity of 425 DEG C is 0.20W/ (mK), the thermal conductivity of 650 DEG C is 0.23W/ (mK), is all better than the thermal conductivity 0.26W/ (mK) of the thermal conductivity 0.193W/ (mK) of 200 DEG C in traditional N level heat insulating casting material, the thermal conductivity 0.229W/ (mK) of 425 DEG C and 650 DEG C.
Test data is in table 1.
Embodiment 2:
Preparation method is with embodiment 1.
According to refractory materials cold crushing strength test method YB/T5201, recording cold crushing strength is 2.0Mpa, is better than traditional N 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 0.85Mpa, is better than traditional N level heat insulating casting material prescribed value 0.8Mpa.
According to the reversible thermal expansion of refractory materials (from non-heated state to N level maximum operation (service) temperature 925 DEG C) test method YB/T5205, record reversible polar expansion 0.38%, be better than traditional N level heat insulating casting material prescribed value 0.4%.
According to refractory materials permanent line change test method YB/T5203, record 925 DEG C of * 5h sample permanent line changes-1.2%, be better than traditional N 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, the thermal conductivity recorded at 200 DEG C is 0.185W/ (mK), the thermal conductivity of 425 DEG C is 0.212W/ (mK), the thermal conductivity of 650 DEG C is 0.245W/ (mK), is all better than the thermal conductivity 0.26W/ (mK) of the thermal conductivity 0.193W/ (mK) of 200 DEG C in traditional N level heat insulating casting material, the thermal conductivity 0.229W/ (mK) of 425 DEG C and 650 DEG C.
Test data is in table 1.
Embodiment 3:
Preparation method is with embodiment 1.
According to refractory materials cold crushing strength test method YB/T5201, recording cold crushing strength is 3.2Mpa, is better than traditional N 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 1.2Mpa, is better than traditional N level heat insulating casting material prescribed value 0.8Mpa.
According to the reversible thermal expansion of refractory materials (from non-heated state to N level maximum operation (service) temperature 925 DEG C) test method YB/T5205, record reversible polar expansion 0.38%, be better than traditional N level heat insulating casting material prescribed value 0.4%.
According to refractory materials permanent line change test method YB/T5203, record 925 DEG C of * 5h sample permanent line changes-0.8%, be better than traditional N 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, the thermal conductivity recorded at 200 DEG C is 0.175W/ (mK), the thermal conductivity of 425 DEG C is 0.198W/ (mK), the thermal conductivity of 650 DEG C is 0.228W/ (mK), is all better than the thermal conductivity 0.26W/ (mK) of the thermal conductivity 0.193W/ (mK) of 200 DEG C in traditional N level heat insulating casting material, the thermal conductivity 0.229W/ (mK) of 425 DEG C and 650 DEG C.
Embodiment test data is in table 1
Table 1
Claims (3)
1. the low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace, is characterized in that described heat insulating casting material is mixed by the following component comprised by weight percentage:
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 the low iron heat insulating casting material of 1100 DEG C of levels used for industrial furnace as claimed in claim 1, is characterized in that described method comprises:
Described component is uniformly mixed obtained 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) lightweight mullite heat insulating brick particle, pearlstone, drift pearl are carried out prebake process;
2) pure calcium aluminate cement, silicon powder, water reducer pre-mixing are evenly made premix; Then mix with lightweight mullite heat insulating brick particle, pearlstone, drift pearl.
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| CN112645670B (en) * | 2020-12-29 | 2022-06-03 | 河南安筑新材料科技有限公司 | Floating bead fireproof heat insulation plate |
| CN113185310A (en) * | 2021-05-12 | 2021-07-30 | 泰兴市恒信特种耐火材料有限公司 | Aluminum-silicon castable added with floating beads and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463880C (en) * | 2007-04-17 | 2009-02-25 | 上海彭浦特种耐火材料厂 | Low-density thermostable high-alumina lightening casting material |
| CN102351547A (en) * | 2011-07-06 | 2012-02-15 | 马鞍山市泰来冶金炉料有限责任公司 | High strength high temperature resistance semi-lightweight high alumina castable and its preparation method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463880C (en) * | 2007-04-17 | 2009-02-25 | 上海彭浦特种耐火材料厂 | Low-density thermostable high-alumina lightening casting material |
| CN102351547A (en) * | 2011-07-06 | 2012-02-15 | 马鞍山市泰来冶金炉料有限责任公司 | High strength high temperature resistance semi-lightweight high alumina castable and its preparation method |
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