CN103253944A - Preparation method of explosionproof low cement castable - Google Patents
Preparation method of explosionproof low cement castable Download PDFInfo
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- CN103253944A CN103253944A CN2013101587367A CN201310158736A CN103253944A CN 103253944 A CN103253944 A CN 103253944A CN 2013101587367 A CN2013101587367 A CN 2013101587367A CN 201310158736 A CN201310158736 A CN 201310158736A CN 103253944 A CN103253944 A CN 103253944A
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- corundum
- aluminium powder
- metallic aluminium
- matrix
- alumina cement
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Abstract
The invention relates to a preparation method of an explosionproof low cement castable. The preparation method comprises the following steps of: utilizing corundum aggregate, a corundum base material, high alumina cement and metal aluminum powder as main raw materials, adopting appropriate raw materials and a ratio thereof as well as a corresponding preparation method, and controlling the granularity and additive amount of the metal aluminum powder so as to obtain the low cement castable with excellent explosion proofness and strength.
Description
Technical field
The present invention relates to the unshape refractory technical field, particularly a kind of preparation method with explosion-proof low cement deposit material of excellent anti-spalling.
Background technology
Metallurgical industry is the main Application Areas of unshape refractory.And the quality of performances such as the intensity of unshape refractory, anti-cracking property has very significant effects for the production efficiency that improves metallurgy industry and energy-conservation level.
The low cement series mould material of development can significantly be improved the physicals of mould material, and result of use also obviously is better than common high cement deposit material.But in the time of owing to raising mould material density, also can cause drawbacks such as its anti-spalling variation, storing time prolongation, especially to large-scale or ultra-large type prefabricated section, its influence is particularly evident.
In order to improve the anti-spalling of low cement deposit material, at present the main method of using is to add admixtures such as inorganic or organic blowing agent such as metallic aluminium powder, azo acid amides and Aluctyl, organic fibre in mould material in the field, the ventilation property that opening venting hole by increasing mould material inside or microcrack improve mould material, make the steam in the mould material be easy to discharge, thereby reach the purpose of improving the mould material anti-cracking property.
Wherein to add low cement deposit material as detonation suppressor more common for metallic aluminium powder, and its mechanism of action is, after mould material adds metallic aluminium powder, and in maintenance processes, metallic aluminium powder and H
2Following thermopositive reaction takes place in O:
2Al+6H
2O＝Al(OH)
3+3H
2↑，
In effusion hydrogen, form the venting hole of opening on the mould material surface, these venting holes become the discharge-channel of aqueous vapor, thereby play the effect that antiknock is split.In the reaction process, factors such as the sclerosis situation of the activity of the amount of generated reactive gas and speed and aluminium powder, granularity, purity and wedding agent, envrionment temperature are closely related.If improper use, can destroy the internal structure of mould material and crack or the problem of tissue deterioration such as bulging, also may cause hydrogen to meet the danger of fire burns, blast when serious.
Summary of the invention
Purpose of the present invention namely is to provide a kind of and has the interpolation metallic aluminium powder of excellent anti-spalling as the preparation method of the explosion-proof low cement deposit material of detonation suppressor.
For achieving the above object, the technical solution used in the present invention is:
A kind of preparation method of explosion-proof low cement deposit material, it may further comprise the steps:
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, 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 μ m, and the granularity of metallic aluminium powder is preferably 15-20 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: the ratio of corundum matrix: high-alumina cement=72-75: 35-40: 2-3 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.4-0.8% then with above-mentioned batching, and the water of 5.2-5.6%;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test qualified back packing warehouse-in.
Pour above-mentioned mould material product into mould and pour into a mould, after the demoulding under 120-130 ℃ of temperature dry 20-22h, detect and to obtain product and have excellent anti-cracking property and working strength.
Preferably, the Al of corundum aggregate and corundum matrix
2O
3Content is all above 96%, and Al in the high-alumina cement
2O
3Content surpasses 65%.
Advantage of the present invention is: adopted proper raw material and proportioning thereof, and corresponding preparation method has obtained the low cement deposit material of anti-spalling excellence.
Embodiment
Below, the present invention is described in detail by specific embodiment 1-3.
Embodiment 1.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 15 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.6% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Embodiment 2.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 18 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.6% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Embodiment 3.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 20 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.6% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Embodiment 4.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 18 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.4% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Embodiment 5.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 18 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.8% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Comparative example 1.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 10 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.6% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Comparative example 2.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 25 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.6% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Comparative example 3.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 18 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.2% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
Comparative example 4.
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, and water is as reaction raw materials, wherein the granularity of corundum aggregate is 13mm, and the granularity of corundum matrix is 95 μ m, and the granularity of metallic aluminium powder is 18 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden, be the metallic aluminium powder of benchmark weighing 1.0% then with above-mentioned batching, and 5.4% water;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test.
The test result of embodiment and comparative example is listed in the table 1, and wherein the test condition of air penetrability is that pressurization pressure is to record under the 0.05MPa condition, and folding strength and compressive strength are to record behind 1500 ℃ 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, detect 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 begins (min) | 60 | 62 | 62 | 61 | 60 | 50 | 75 | 65 | 60 |
| Evolving gas finishes (min) | 180 | 185 | 188 | 184 | 188 | 40 | 420 | 174 | 190 |
By The above results as can be known, the granularity of metallic aluminium powder and addition have material impact for the performance of mould material, in order to guarantee enough air penetrabilities, the granularity of metallic aluminium powder should be maintained below the 20 μ m, too senior general makes that being difficult to make whole aluminium powders to obtain effective gas overflows, cause being difficult to the air penetrability that obtains to envision, also make evolving gas begin to cross evening slow and influence maintenance simultaneously and control; But also should be noted that and to make that the granularity of metallic aluminium powder is meticulous, when less than 15 μ m, to make the too early too fast effusion of gas, and be difficult to its effective control, and then cause the severe exacerbation of mould material structure property, therefore, the metallic aluminium powder granularity must be maintained 15-20 μ m, and take all factors into consideration exhaust performance and working strength, be preferably 18 μ m.The addition of metallic aluminium powder should be at least more than 0.4%, add and for example to be lower than 0.4% very little and will to make ventilation rate obviously not enough and do not have an effect that effective antiknock is split, adding does not too much for example have more increase ventilation rate effects of generation to worsen strength property on the contrary above 0.8%, therefore, the addition of metallic aluminium powder must be controlled at 0.4%-0.8%.
Certainly above conclusion should be prerequisite with proportioning raw materials among the application, namely should consider the proportioning that it more preferably is applicable to corundum aggregate among the application, corundum matrix, high-alumina cement.
Claims (5)
1. the preparation method of an explosion-proof low cement deposit material is characterized in that may further comprise the steps:
At first, select corundum aggregate, corundum matrix, high-alumina cement and metallic aluminium powder for use, 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 μ m, and the granularity of metallic aluminium powder is preferably 15-20 μ m;
Second, with corundum aggregate, corundum matrix, three kinds of reaction raw materials of high-alumina cement according to the corundum aggregate: the ratio of corundum matrix: high-alumina cement=72-75: 35-40: 2-3 is prepared burden, be the metallic aluminium powder of benchmark weighing 0.4-0.8% then with above-mentioned batching, and the water of 5.2-5.6%;
The 3rd, earlier corundum matrix and high-alumina cement are carried out just mixing 10-15min, add metallic aluminium powder subsequently and carefully mix 25-30min, add corundum aggregate and water mixing 15-20min at last, obtain mould material, test qualified back packing warehouse-in.
2. preparation method according to claim 1, it is characterized in that: the granularity of metallic aluminium powder is preferably 18 μ m.
3. preparation method according to claim 1, it is characterized in that: it is 0.6% that the addition of metallic aluminium powder is preferably.
4. preparation method according to claim 1 is characterized in that: according to the corundum aggregate: corundum matrix: the ratio of high-alumina cement=74: 38: 2.5 is prepared burden.
5. preparation method according to claim 1 is characterized in that: the Al of corundum aggregate and corundum matrix
2O
3Content is all above 96%, and Al in the high-alumina cement
2O
3Content surpasses 65%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105801096A (en) * | 2014-12-01 | 2016-07-27 | 张婷 | Pouring material special for coal-injection duct of cement kiln of 12,000 T |
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 |
|---|
| 郑江等: "金属铝粉在浇注料泥浆中的发气研究", 《2011全国不定形耐火材料学术会议论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105801096A (en) * | 2014-12-01 | 2016-07-27 | 张婷 | Pouring material special for coal-injection duct of cement kiln of 12,000 T |
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