CN1257866C - Sol combined fire-proof cast material containing carbon and its preparing method - Google Patents
Sol combined fire-proof cast material containing carbon and its preparing method Download PDFInfo
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- CN1257866C CN1257866C CN 03125319 CN03125319A CN1257866C CN 1257866 C CN1257866 C CN 1257866C CN 03125319 CN03125319 CN 03125319 CN 03125319 A CN03125319 A CN 03125319A CN 1257866 C CN1257866 C CN 1257866C
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- colloidal sol
- carbon
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- casting material
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Abstract
The present invention provides a sol combined refractory casting material containing carbon and a preparing method thereof, and relate to an unformed refractory material and a preparing method thereof, which solves the problems of short service life, long drying and baking time, easy drop during baking, low oxidation resistance with carbon, low mixed uniformity, and the like existing in the prior art. In order to solve the problems, the present invention has the technical measure that the sol combined refractory casting material containing carbon comprises a casting material basal body, a hardening accelerator, water, 1 to 15 wt% of sol, 0.1 to 10 wt% of hardening accelerator and 1 to 10 wt% of carbon. In the preparing method, the casting material basal body which is prepared from coarse aggregate, a powdery material and a carbon material is primarily mixed; the hardening accelerator is added into the primarily mixed casting material basal body for finely mixed, and the sol and the water are added into the mixture to be uniformly mixed; the made casting material is poured into a mould or a part to be poured with, and the obtained substance stands for 0.5 to 4 hours; and the obtained substance is baked for over three hours. The casting material has the advantages of easy formation, short baking time, good explosion resisting performance and long service life.
Description
Technical field
The present invention relates to a kind of unshape refractory, particularly a kind of colloidal sol is in conjunction with carbon containing refractory castable and preparation method thereof.
Background technology
Metallurgical industry is the application rich and influential family of unshape refractory, the performance of unshape refractory (intensity, anti-cracking property, erosion resistance etc.) to work-ing life of improving furnace lining, important influence reduces production costs.Cement commonly used combines (cement consumption 3～7%) mould material because medium temperature intensity is low in conjunction with mould material with low cement, the void content height, and work-ing life is lower; United States Patent (USP) 4506025,5104833,5681785 disclose respectively a kind of with SiO
2As the mould material of ultrafine powder, a kind of with ZrO
2, MgO is the refractory castable of ultrafine powder and a kind of with Al
2O
3As the refractory castable of coarse aggregate, but ultrafine powder bonded normal temperature strength is lower.Chinese patent 93120484,93121050 disclose compound alumina material for deposit without cement and cement-less self-flow corundum composite casting material, its main principle just is to use ultrafine powder, ultrafine powder is filled the slight gap in the mould material, increase the density of material, burn back intensity raising, but also brought the shortcoming of anti-cracking property difference; Because the adding of ultrafine powder has reduced the space of mould material, make in the mould material moisture be difficult for discharging, occur explosion when being heated and peel off, thereby influence the carrying out of ordinary production, and accident that may damaging property; Because normal temperature strength is not high, dry storing time is long, causes difficulty to the demoulding simultaneously.Chinese patent publication number CN1303836A disclosed " a kind of low-cement refractory pouring material ", disclose that aggregate, ultrafine powder, binding agent, admixture carry out compound in a kind of employing fine PP fiber and the mould material, fiber dispersion is even to solve, the anti-cracking property problem, but owing to still adopt cement as wedding agent, therefore the deficiency of its existence is that medium temperature intensity is lower, peel off easily during baking, if carbon containing, then oxidation-resistance is still relatively poor, and be powder with powder between mix, its blended homogeneity is also still poor.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, providing a kind of at high temperature is solidifiable, casting material strength strengthens gradually with the temperature increase, can not produce the high temperature explosion and peel off, and can improve the oxidation-resistance and the heat resistanceheat resistant destructiveness of material, and the demoulding easily behind the Air drying, the bake process time shortens, can strengthen the mixing uniformity of carbon element and water, reduce on-the-spot obnoxious flavour evaporable colloidal sol in conjunction with carbon containing refractory castable and preparation method thereof.
Realize the technical measures of above-mentioned purpose:
Colloidal sol is in conjunction with the carbon containing refractory castable, and it is the main ingredient and the weight percent content of described mould material: colloidal sol 1～15, accelerator for hardening 0.1～10, carbon materials 1～10, surplus are mould material matrix and water;
Colloidal sol is formed and weight percent content is: SiO
20.1～75%; Al
2O
30.1～50%; Na
2O 0.05～10%; K
2O0.05～10%; MgO 0.05～20%; TiO
20.1～15%; Water 20～75%.
It is that described carbon materials is a surface modification graphite, hard pitch, coke powder in one or more mixture.
It is that carbon materials is after being pre-mixed briquetting with fire-resistant fine powder, buries carbon again and burns till the back and granulate and modification.
It is two or more the mixture of ingredients in Tai-Ace S 150, tripoly phosphate sodium STPP, sal epsom, water glass or the calcium aluminate of consisting of of described accelerator for hardening.
It is that the mould material matrix that will be made up of coarse aggregate, powder carries out just mixing, be that the carbon materials of 0.1～10% accelerator for hardening and 1～10% joins and carries out in the mould material matrix that just mixes carefully mixing again with weight percent, add weight percent 1～15% colloidal sol then, water mixes and make it even, the mould material of making is transported to the job location and pours mould into or position to be cast, left standstill 0.5～3 hour, rebake is more than 3 hours.
It is that the mould of mould material adopts disposable plastics supporting mould.
It is mould be anti-more than 100 ℃ the plastics of temperature make.
Is to solve casting material strength, heat resistanceheat resistant destructive characteristics, increase a furnace lining important means in work-ing life with colloidal sol as the wedding agent of carbon containing mould material.Its mechanism is: by introducing colloidal sol in conjunction with phase, between aggregate and matrix, form good stability in conjunction with mutually, improve the bonding strength of carbon containing mould material.Owing to be the form of liquid phase, in conjunction with all surface that is penetrated into aggregate and fine powder mutually easily.Behind the Air drying, the demoulding easily, the bake process time shortens; Because the colloidal sol temperature influence is little, high temperature is solidifiable, and increase to form stable with temperature in conjunction with phase, therefore casting material strength increases gradually, can not produce the high temperature explosion and peel off, and the film that colloidal sol forms to carbon element oxidation played the effect of preventing, improved the antioxidant property and the heat resistanceheat resistant destructive characteristics of material.
After characteristics of the present invention are to adopt the colloidal sol combination of high fire-resistant phase, because the adding of accelerator for hardening and modification carbon materials, the carbon containing refractory castable of making is easy to moulding, storing time is short, the demoulding easily behind the Air drying, high temperature can form stable in conjunction with phase down, therefore the mould material high temperature break resistant intensity significantly increases and (is generally 1.5 MPas abroad, the present invention is 4.75 MPas), anti-cracking property is good, the life-span is long, the film that colloidal sol forms to carbon element oxidation played the effect of preventing, improve the antioxidant property and the heat resistanceheat resistant destructive characteristics of material, and be easy to the repairing of liner.
Specific embodiments
By following examples design of the present invention and the principles of science are described, but should think that the present invention only limits to following material and the composition that relates in the example of executing.
Embodiment 1: the each component prescription is (weight percentage) brown corundum 55%, aluminum oxide fine powder 25%, accelerator for hardening (for Tai-Ace S 150 3, tripoly phosphate sodium STPP 0.15 and water glass 0.15 mixture) 3.3%, Graphite Powder 99 (modification) 5%.
Described colloidal sol consists of (weight percent): SiO
233%, Al
2O
315%, Na
2O 0.15%, K
2O 0.15%, MgO 5%, TiO
21.7%; Water 45%.
The cast matrix of the brown corundum of aforementioned proportion, aluminum oxide fine powder, Graphite Powder 99 (modification) composition is carried out just mixing, to join by the accelerator for hardening of Tai-Ace S 150, tripoly phosphate sodium STPP and water glass mixed 3.3% again and carry out in the mould material matrix that just mixes carefully mixing, add 8% colloidal sol then, 3.7% water mixes and make it even, the mould material of making is transported to the job location and pours plastics supporting mould into or position to be cast, left standstill rebake 3 hours 2 hours.Surveying its results of property sees attached list.
Embodiment 2: the each component prescription is (weight percentage) compact alumina 58%, aluminum oxide fine powder 25%, accelerator for hardening (mixture of sal epsom 4, tripoly phosphate sodium STPP 0.25, calcium aluminate 0.25) 4.5%, asphalt powder (modification) 5%.
Described colloidal sol consists of (weight percent): SiO
233%, Al
2O
35.2%, Na
2O 0.15%, K
2O0.15%, MgO 15%, TiO
21.5%, water 45%.
The cast matrix of the compact alumina of aforementioned proportion, aluminum oxide fine powder, asphalt powder (modification) composition is carried out just mixing, to join by the accelerator for hardening of Tai-Ace S 150, tripoly phosphate sodium STPP and water glass mixed 4.5% again and carry out in the mould material matrix that just mixes carefully mixing, add 6% colloidal sol then, 1.5% water mixes and make it even, the mould material of making is transported to the job location and pours plastics supporting mould into or position to be cast, left standstill rebake 10 hours 3 hours.Surveying its results of property sees attached list.
Embodiment 3: the each component prescription consist of (weight percentage) compact alumina 63%, aluminum oxide fine powder 20%, silica powder 3%, colloidal sol 6%,
Accelerator for hardening(Tai-Ace S 150 2, tripoly phosphate sodium STPP 0.5 and water glass 0.5
Mix Compound) 3.0%, modification coke powder 3%.
Described colloidal sol consists of (weight percent): SiO
230%, Al
2O
312.2%, Na
2O 0.1%, K
2O0.2%, MgO 10%, TiO
26.5%, water 41%.
The cast matrix of the compact alumina of aforementioned proportion, aluminum oxide fine powder, silica powder, coke powder (modification) composition is carried out just mixing, to join by the accelerator for hardening of Tai-Ace S 150, tripoly phosphate sodium STPP and water glass mixed 3% again and carry out in the mould material matrix that just mixes carefully mixing, add 6% colloidal sol then, 2% water mixes and make it even, the mould material of making is transported to the job location and pours plastics supporting mould into or position to be cast, left standstill rebake 3 hours 3 hours.Surveying its results of property sees attached list.Surveying its results of property sees attached list.
Subordinate list
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Compressive strength/MPa | 110℃ | 25 | 21 | 29 |
| 1000℃ | 36 | 32 | 36 | |
| 1450℃ | 46 | 42 | 58 | |
| Folding strength/MPa | 110℃ | 2.8 | 2.5 | 2.8 |
| 1000℃ | 5.6 | 4.9 | 3.6 | |
| 1450℃ | 12.7 | 8.3 | 7.5 | |
| High temperature break resistant intensity/MPa | 1400℃ | 3.9 | 4.7 | 4.3 |
| Refractoriness/℃ | ＞1790 | ＞1790 | ＞1790 | |
| Burn back volume density/(g/cm 3) | 2.83 | 2.86 | 2.87 | |
| Apparent porosity/% | 17.2 | 18.0 | 18.2 | |
Claims (7)
1, colloidal sol is characterized in that component and weight percent content that described mould material is main in conjunction with the carbon containing refractory castable: colloidal sol 1～15, accelerator for hardening 0.1～10, carbon materials 1～10, surplus are mould material matrix and water;
Colloidal sol is formed and weight percent content is: SiO
20.1～75%; Al
2O
30.1～50%; Na
2O 0.05～10%; K
2O 0.05～10%; MgO 0.05～20%; TiO
20.1～15%; Water 20～75%.
2. colloidal sol according to claim 1 is in conjunction with the carbon containing refractory castable, it is characterized in that described carbon materials is a surface modification graphite, hard pitch, coke powder in one or more mixture.
3, colloidal sol according to claim 2 is characterized in that in conjunction with the carbon containing refractory castable carbon materials is after being pre-mixed briquetting with fire-resistant fine powder, buries carbon again and burns till the back and granulate and modification.
4, colloidal sol according to claim 1 is in conjunction with the carbon containing refractory castable, it is characterized in that two or more the mixture of ingredients in Tai-Ace S 150, tripoly phosphate sodium STPP, sal epsom, water glass or the calcium aluminate of consisting of of described accelerator for hardening.
5. be used for the preparation method of the described colloidal sol of claim 1 in conjunction with the carbon containing refractory castable, it is characterized in that to be undertaken by the mould material matrix that coarse aggregate, powder are formed just mixing, be that the carbon materials of 0.1～10% accelerator for hardening and 1～10% joins and carries out in the mould material matrix that just mixes carefully mixing again with weight percent content, adding weight percent content then and be 1～15% colloidal sol, water mixes and makes it even, the mould material of making is transported to the job location and pours mould into or position to be cast, left standstill 0.5～3 hour, rebake is more than 3 hours.
6. colloidal sol according to claim 5 is characterized in that in conjunction with the preparation method of carbon containing refractory castable the mould of mould material adopts disposable plastics supporting mould.
7. colloidal sol according to claim 5 is in conjunction with the preparation method of carbon containing refractory castable, it is characterized in that mould be anti-more than 100 ℃ the plastics of temperature make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03125319 CN1257866C (en) | 2003-08-25 | 2003-08-25 | Sol combined fire-proof cast material containing carbon and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03125319 CN1257866C (en) | 2003-08-25 | 2003-08-25 | Sol combined fire-proof cast material containing carbon and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1491918A CN1491918A (en) | 2004-04-28 |
| CN1257866C true CN1257866C (en) | 2006-05-31 |
Family
ID=34239603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03125319 Expired - Fee Related CN1257866C (en) | 2003-08-25 | 2003-08-25 | Sol combined fire-proof cast material containing carbon and its preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1257866C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293779B (en) * | 2008-06-25 | 2011-03-23 | 河南省耕生耐火材料有限公司 | Environment-friendly pouring box drying type vibrating material wedding agent |
| CN102633507A (en) * | 2011-02-15 | 2012-08-15 | 三和耐火工业股份有限公司 | Silicasol casting material for blast furnace sprue |
| CN113459243A (en) * | 2021-05-22 | 2021-10-01 | 广东新兴铸管有限公司 | Manufacturing method of fan-shaped bag with long service life |
| CN113666723B (en) * | 2021-08-25 | 2022-12-27 | 江苏江能新材料科技有限公司 | Carbon nanofiber modified carbon-containing refractory castable and preparation method thereof |
| CN114349524A (en) * | 2022-01-12 | 2022-04-15 | 郑州汇盛耐火材料有限公司 | Carbon nanofiber modified carbon-containing refractory castable and preparation method thereof |
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2003
- 2003-08-25 CN CN 03125319 patent/CN1257866C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1491918A (en) | 2004-04-28 |
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Granted publication date: 20060531 Termination date: 20130825 |