CN103253944B - A kind of preparation method of Explosionproof low cement castable - Google Patents
A kind of preparation method of Explosionproof low cement castable Download PDFInfo
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- CN103253944B CN103253944B CN201310158736.7A CN201310158736A CN103253944B CN 103253944 B CN103253944 B CN 103253944B CN 201310158736 A CN201310158736 A CN 201310158736A CN 103253944 B CN103253944 B CN 103253944B
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- corundum
- aluminium powder
- metallic aluminium
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- alumina cement
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Abstract
A kind of preparation method of Explosionproof low cement castable, adopt corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder as main raw material, take suitable raw material and proportioning thereof, and corresponding preparation method, the Low Cement Castable of anti-spalling and excellent strength is obtained by the granularity and addition controlling metallic aluminium powder.
Description
Technical field
The present invention relates to unshape refractory technical field, particularly a kind of preparation method with the Explosionproof low cement castable of excellent anti-spalling.
Background technology
Metallurgical industry is the main Application Areas of unshape refractory.And the quality of the performances such as the intensity of unshape refractory, anti-cracking property has very important impact for the production efficiency and energy-saving horizontal improving metallurgy industry.
Develop the physicals that low cement series mould material significantly can improve mould material, result of use is also obviously better than common high cement deposit material.But while improving mould material density, also can cause the drawbacks such as its anti-spalling variation, baking time prolongation, especially to large-scale or ultra-large type prefabricated section, its impact is particularly evident.
In order to improve the anti-spalling of Low Cement Castable, in current field, the main method used is in mould material, add the inorganic or organic blowing agent such as metallic aluminium powder, azo acid amides and the admixture such as Aluctyl, organic fibre, the ventilation property of mould material is improved by the opening venting hole or microcrack increasing mould material inside, make the steam in mould material be easy to discharge, thus reach the object improving mould material anti-cracking property.
Wherein to add Low Cement Castable as detonation suppressor more common for metallic aluminium powder, and its mechanism of action is, after mould material adds metallic aluminium powder, in maintenance processes, and metallic aluminium powder and H
2there is following thermopositive reaction in O:
2Al+6H
2O＝Al(OH)
3+3H
2↑，
While effusion hydrogen, form the venting hole of opening on mould material surface, these venting holes become the discharge-channel of aqueous vapor, thus play the effect that antiknock splits.In reaction process, the factor such as sclerotic conditions, envrionment temperature of the activity of the amount of generated reactive gas and speed and aluminium powder, granularity, purity and bonding agent is closely related.If improper use, the internal structure of mould material can be destroyed and crack or the problem of the tissue deterioration such as bulging, hydrogen time serious, also may be caused to meet the danger of fire burning, blast.
Summary of the invention
Namely object of the present invention is to provide a kind of preparation method of interpolation metallic aluminium powder as the Explosionproof low cement castable of detonation suppressor with excellent anti-spalling.
For achieving the above object, the technical solution used in the present invention is:
A preparation method for Explosionproof low cement castable, it comprises the following steps:
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 12-15mm, and the granularity of corundum matrix is 80-100 μm, and the granularity of metallic aluminium powder is preferably 15-20 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: the ratio of high-alumina cement=72-75: 35-40: 2-3 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.4-0.8%, and the water of 5.2-5.6%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test, qualified rear packaging warehouse-in.
Pour above-mentioned mould material product into mould to pour into a mould, after the demoulding at 120-130 DEG C of temperature dry 20-22h, detect and obtain product there is excellent anti-cracking property and working strength.
Preferably, the Al of corundum aggregate and corundum matrix
2o
3content is all more than 96%, and Al in high-alumina cement
2o
3content is more than 65%.
Advantage of the present invention is: have employed suitable raw material and proportioning thereof, and corresponding preparation method obtains the Low Cement Castable of anti-spalling excellence.
Embodiment
Below, by specific embodiment 1-3, the present invention is described in detail.
Embodiment 1.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 15 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.6%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Embodiment 2.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 18 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.6%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Embodiment 3.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 20 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.6%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Embodiment 4.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 18 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.4%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Embodiment 5.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 18 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.8%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Comparative example 1.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 10 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.6%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Comparative example 2.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 25 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.6%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Comparative example 3.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 18 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.2%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
Comparative example 4.
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μm, and the granularity of metallic aluminium powder is 18 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 1.0%, and the water of 5.4%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test.
The test result of embodiment and comparative example is listed in table 1, and wherein the test condition of air penetrability is pressurization pressure is record under 0.05MPa condition, and folding strength and compressive strength record after 1500 DEG C of sintering.
Table 1
| 1 | 2 | 3 | 4 | 5 | 1’ | 2’ | 3’ | 4’ | |
| Void content (10 -16m 2) | 81 | 78 | 70 | 53 | 88 | 90 | 45 | 23 | 92 |
| Folding strength (MPa) | 18 | 22 | 23 | 25 | 15 | 10 | 25 | 27 | 8 |
| Compressive strength (MPa) | 150 | 152 | 155 | 160 | 147 | 103 | 162 | 162 | 95 |
In addition, have detected the situation of embodiment and comparative example evolving gas, the results are shown in table 2
Table 2
| 1 | 2 | 3 | 4 | 5 | 1’ | 2’ | 3’ | 4’ | |
| Evolving gas starts (min) | 60 | 62 | 62 | 61 | 60 | 50 | 75 | 65 | 60 |
| Evolving gas terminates (min) | 180 | 185 | 188 | 184 | 188 | 40 | 420 | 174 | 190 |
From the above results, the granularity of metallic aluminium powder and addition have material impact for the performance of mould material, in order to ensure enough air penetrabilities, the granularity of metallic aluminium powder should be maintained less than 20 μm, too senior general makes to be difficult to make whole aluminium powder obtain the effusion of effective gas, cause being difficult to obtain the air penetrability envisioned, also make evolving gas start cross evening slow and affect maintenance control simultaneously; But also should be noted that can not to make the granularity of metallic aluminium powder meticulous, when being less than 15 μm, the too early too fast effusion of gas will be made, and be difficult to effectively control it, and then cause the severe exacerbation of mould material structure property, therefore, metallic aluminium powder granularity must be maintained 15-20 μm, and consider exhaust performance and working strength, be preferably 18 μm.The addition of metallic aluminium powder should at least more than 0.4%, add and such as not have lower than 0.4% the effect that effective antiknock splits by making ventilation rate obviously not enough very little, add and such as do not have more than 0.8% the more increase ventilation rate effects of generation to worsen strength property on the contrary too much, therefore, the addition of metallic aluminium powder must be controlled at 0.4%-0.8%.
Certainly above conclusion premised on the application's Raw proportioning, namely should should consider that it is more preferably applicable to the proportioning of corundum aggregate in the application, corundum matrix, high-alumina cement.
Claims (1)
1. a preparation method for Explosionproof low cement castable, is characterized in that comprising the following steps:
First, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 12-15mm, and the granularity of corundum matrix is 80-100 μm, and the granularity of metallic aluminium powder is 18 μm;
Second, by corundum aggregate, corundum matrix, high-alumina cement three kinds of reaction raw materials according to corundum aggregate: corundum matrix: high-alumina cement=74: the ratio of 38: 2.5 is prepared burden, then with the metallic aluminium powder of above-mentioned batching for benchmark weighing 0.6%, and the water of 5.2-5.6%;
3rd, first corundum matrix and high-alumina cement are carried out just mixed 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, finally add corundum aggregate and water mixing 15-20min, obtain mould material, test, qualified rear packaging warehouse-in;
Wherein, the Al of corundum aggregate and corundum matrix
2o
3content is all more than 96%, and Al in high-alumina cement
2o
3content is more than 65%.
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Citations (3)
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|---|---|---|---|---|
| CN1203207A (en) * | 1997-06-25 | 1998-12-30 | 西安市华秦工业窑炉公司 | High-strength fireproof pour material |
| CN101805196A (en) * | 2010-03-19 | 2010-08-18 | 蒋志忠 | Preparation method of quick-drying anti-explosion wear-resistant casting material |
| CN101830719A (en) * | 2010-05-28 | 2010-09-15 | 河南华西耐火材料有限公司 | Explosion-proof iron runner castable |
-
2013
- 2013-04-25 CN CN201310158736.7A patent/CN103253944B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203207A (en) * | 1997-06-25 | 1998-12-30 | 西安市华秦工业窑炉公司 | High-strength fireproof pour material |
| CN101805196A (en) * | 2010-03-19 | 2010-08-18 | 蒋志忠 | Preparation method of quick-drying anti-explosion wear-resistant casting material |
| CN101830719A (en) * | 2010-05-28 | 2010-09-15 | 河南华西耐火材料有限公司 | Explosion-proof iron runner castable |
Non-Patent Citations (1)
| Title |
|---|
| 金属铝粉在浇注料泥浆中的发气研究;郑江等;《2011全国不定形耐火材料学术会议论文集》;20111231;第149-151页 * |
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