CN104311058B - Corundum fireproof castable - Google Patents
Corundum fireproof castable Download PDFInfo
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- CN104311058B CN104311058B CN201410524052.9A CN201410524052A CN104311058B CN 104311058 B CN104311058 B CN 104311058B CN 201410524052 A CN201410524052 A CN 201410524052A CN 104311058 B CN104311058 B CN 104311058B
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Abstract
A kind of corundum fireproof castable, including coarse aggregate, middle aggregate, fine aggregate, sodium silicate, nano magnesia, nano zine oxide, alumina powder, hydrated alumina, wherein the parts by weight of above-mentioned raw materials are: coarse aggregate 15～20 parts, middle aggregate accounts for 35～40 parts, and fine aggregate accounts for 15～30 parts, sodium silicate 5～10 parts, nano magnesia 5～10 parts, nano zine oxide 1～5 part, alumina powder 10～15 parts, hydrated alumina 1～6 part.Wherein, coarse aggregate is corundum；Middle aggregate includes dolomite and zircon, and fine aggregate is corundum.
Description
Technical field
The invention belongs to technical field of refractory materials, particularly relate to a kind of corundum fireproof castable.
Background technology
Compared with qualitative refractory product, have that technological process is short with the unshape refractory that castable refractory is representative, energy consumption and cost is low, easy to use, applied widely, globality and the advantage such as result of use is good, thus worldwide obtain and develop rapidly, its proportion shared in whole refractory material is more and more higher.In the country that some refractory technologies are advanced, the yield of unshape refractory is already close to the yield even more than setting goods.Such as, the ratio that Japanese unshape refractory yield accounts for whole refractory material at present has reached about 60%；The U.S. is about 50%；English, moral, Fa Deng state are 40% ~ 50%.Nowadays, castable refractory has been widely used in the high-temperature service of the industrial circles such as metallurgy, building materials, electric power, chemical industry, for instance, corundum fireproof castable is widely used in the industries such as metallurgy, petrochemical industry, building materials with the high-temperature behavior of its excellence.
But the corundum castable of traditional low cement or Ultra low cement bond is due to the use of aluminous cement and SiO2 micropowder, makes the temperature that liquid phase occurs in material reduce, had a strong impact on the high-temperature behavior of material.And the corundum castable that cement-free combines is due to the decomposition of hydras in middle thermophase (800～1100 DEG C) bonding agent, there is no again new combination produces mutually, and the medium temperature intensity of material is very low, it is impossible to meet the requirement of onsite application.
Summary of the invention
In view of this, for the deficiencies in the prior art, the present invention provides the corundum fireproof castable of a kind of high comprehensive performance.
A kind of corundum fireproof castable, including coarse aggregate, middle aggregate, fine aggregate, sodium silicate, nano magnesia, nano zine oxide, alumina powder, hydrated alumina, wherein the parts by weight of above-mentioned raw materials are: coarse aggregate 15～20 parts, middle aggregate accounts for 35～40 parts, and fine aggregate accounts for 15～30 parts, sodium silicate 5～10 parts, nano magnesia 5～10 parts, nano zine oxide 1～5 part, alumina powder 10～15 parts, hydrated alumina 1～6 part.Wherein, coarse aggregate is corundum；Middle aggregate includes dolomite and zircon, and fine aggregate is corundum.
In corundum fireproof castable of the present invention, under high temperature, zinc oxide reacts with aluminium oxide, generate fusing point reach 1950 DEG C gahnite, dolomite and zircon reaction generate zirconium dioxide or zirconium oxygen, aluminium oxide and nano oxidized reactive magnesium also carry out calcining and generate aluminum-spinel, and zirconium dioxide or zirconium oxygen can make up the microcrack that microcrack produces simultaneously.Gahnite, aluminum-spinel have good thermal shock resistance, and the erosion of acid and alkali-resistance, gahnite, aluminum-spinel generation compensate for hydrated alumina aquation in conjunction with product the 600-900 DEG C of decline of material medium temperature intensity decomposed and cause, it is effectively improved the medium temperature intensity of corundum castable, meanwhile, the addition of zircon makes the thermal shock resistance of corundum fireproof castable increase.
Detailed description of the invention
A kind of corundum fireproof castable, including coarse aggregate, middle aggregate, fine aggregate, sodium silicate, nano magnesia, nano zine oxide, alumina powder, hydrated alumina, wherein the parts by weight of above-mentioned raw materials are: coarse aggregate 15～20 parts, middle aggregate accounts for 35～40 parts, and fine aggregate accounts for 15～30 parts, sodium silicate 5～10 parts, nano magnesia 5～10 parts, nano zine oxide 1～5 part, alumina powder 10～15 parts, hydrated alumina 1～6 part.Wherein, coarse aggregate is corundum；It is dolomite 30 parts, zircon 70 parts that middle aggregate includes the parts by weight of dolomite and zircon, dolomite and zircon；Fine aggregate is corundum.
Refractory material is in order to reach desirable fireproof high-temperature resistant effect, the version of what is called " dense accumulation " must be formed, this version be by occupy the aggregate thick, middle in space, material big portion, the fine aggregate in filling aggregate space thick, middle, the carse, medium and small aggregate space of filling micropowder obtain, therefore the particle diameter of castable refractory kinds of ingredients is selected critically important, in the present embodiment, the size of described coarse aggregate is 2.0～2.5mm；In described middle aggregate, the size of each component is 1.0～1.5mm；The size of described fine aggregate is 0.1～0.6mm.
The alumina powder added in the present invention is activated alumina, and the principal crystalline phase of activated alumina is α～Al2O3Physicochemical property is that d≤2.0 μm, true density >=3.95g/cm, NaO are less than or equal to 0.1%, activated alumina can make the castable refractory apparent porosity of cast less, further, under high temperature, zinc oxide reacts with aluminium oxide, generate fusing point reach 1950 DEG C gahnite, dolomite and zircon reaction generate zirconium dioxide or zirconium oxygen, aluminium oxide and nano oxidized reactive magnesium also carry out calcining and generate aluminum-spinel, and zirconium dioxide or zirconium oxygen can make up the microcrack that microcrack produces simultaneously.Gahnite, aluminum-spinel have good thermal shock resistance, and the erosion of acid and alkali-resistance, gahnite, aluminum-spinel generation compensate for hydrated alumina aquation in conjunction with product the 600-900 DEG C of decline of material medium temperature intensity decomposed and cause, it is effectively improved the medium temperature intensity of corundum castable, meanwhile, the addition of zircon makes the thermal shock resistance of corundum fireproof castable increase.
Embodiment 1
(1) preparation of castable:
Aggregate 35,0.1mm fine aggregate 15 in 2.0mm coarse aggregate 20,1.0mm, sodium silicate 5 parts, nano magnesia 5 parts, nano zine oxide 5 parts, alumina powder 10 parts, hydrated alumina 5 parts.By said ratio, add water after each raw material is weighed companion and, it is thus achieved that corundum fireproof castable.
(2) quantitative measurement:
After 110 DEG C × 24h is dried, rupture strength 110.2MPa, compressive resistance 22.5MPa；
After 1200 DEG C × 3H processes, rupture strength 125.3MPa, compressive resistance 26.9MPa；
After 1600 DEG C × 3H processes, rupture strength 126.6MPa, compressive resistance 25.2MPa.
Embodiment 2
(1) preparation of castable:
Aggregate 40,0.6mm fine aggregate 15 in 2.5mm coarse aggregate 15,1.5mm, sodium silicate 1 part, nano magnesia 6 parts, nano zine oxide 6 parts, alumina powder 11 parts, hydrated alumina 6 parts.By said ratio, add water after each raw material is weighed companion and, it is thus achieved that corundum fireproof castable.
(2) physical property detection:
After 110 DEG C × 24h is dried, rupture strength 111.2MPa, compressive resistance 22.3MPa；
After 1200 DEG C × 3H processes, rupture strength 125.1MPa, compressive resistance 25.8MPa；
After 1600 DEG C × 3H processes, rupture strength 125.6MPa, compressive resistance 24.3MPa.
As described above, it is only presently preferred embodiments of the present invention, when not limiting scope of the invention process with this, the simple equivalence namely generally made according to the present patent application the scope of the claims and invention description content changes and modifies, and all still remains within the scope of the patent.
Claims (2)
1. a corundum fireproof castable, it is characterized in that: including coarse aggregate, middle aggregate, fine aggregate, sodium silicate, nano magnesia, nano zine oxide, alumina powder, hydrated alumina, wherein the parts by weight of above-mentioned raw materials are: coarse aggregate 15～20 parts, middle aggregate accounts for 35～40 parts, fine aggregate accounts for 15～30 parts, sodium silicate 5～10 parts, nano magnesia 5～10 parts, nano zine oxide 1～5 part, alumina powder 10～15 parts, hydrated alumina 1～6 part, wherein, coarse aggregate is corundum；Middle aggregate includes dolomite and zircon, and fine aggregate is corundum；The size of described coarse aggregate is 2.0～2.5mm；In described middle aggregate, the size of each component is 1.0～1.5mm；The size of described fine aggregate is 0.1～0.6mm.
2. corundum fireproof castable according to claim 1, it is characterized in that: the parts by weight of above-mentioned raw materials are particularly as follows: 2.0mm coarse aggregate 20, aggregate 35 in 1.0mm, 0.1mm fine aggregate 15, sodium silicate 5 parts, nano magnesia 5 parts, nano zine oxide 5 parts, alumina powder 10 parts, hydrated alumina 5 parts.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105601292A (en) * | 2015-12-30 | 2016-05-25 | 宜兴市集创新材料科技有限公司 | Acid-resistant and alkali-resistant fire-resistant repairing material |
| CN106587956B (en) * | 2016-11-24 | 2019-12-10 | 武汉科技大学 | Nanocrystalline inner-hole light-weight corundum complex-phase refractory aggregate and preparation method thereof |
| CN110407596A (en) * | 2019-09-06 | 2019-11-05 | 山西普皓环保科技有限公司 | One kind castable refractory containing fused alumina zirconia and preparation method thereof |
| CN114149271A (en) * | 2021-12-25 | 2022-03-08 | 郑州震达耐火材料有限公司 | Special high-strength corundum castable and preparation method thereof |
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| JP2607918B2 (en) * | 1988-06-24 | 1997-05-07 | 川崎炉材株式会社 | Pouring refractories |
| CN103242049A (en) * | 2013-05-08 | 2013-08-14 | 绵阳汇丰炉窑材料有限公司 | Foam light refractory casting material and preparation method thereof |
| CN103553680A (en) * | 2013-10-31 | 2014-02-05 | 宁夏天纵泓光余热发电技术有限公司 | Wearable refractory castable |
| CN103539475A (en) * | 2013-11-09 | 2014-01-29 | 宁夏天纵泓光余热发电技术有限公司 | Corundum castable refractory |
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Effective date of registration: 20210119 Address after: 755000 Shengjin village, Zhenluo Town, Shapotou District, Zhongwei City, Ningxia Hui Autonomous Region Patentee after: Ningxia Shengjin Cement Co., Ltd Address before: 750021 the Ningxia Hui Autonomous Region Yinchuan Xixia Industrial Park Jin Bo South Road Chuangxin crane hospital Patentee before: NINGXIA TIANZONG HONGGUANG COGENERATION TECHNOLOGY Co.,Ltd. |