CN102351551B - Energy-saving swing-groove for continuous casting tundish and preparation method thereof - Google Patents
Energy-saving swing-groove for continuous casting tundish and preparation method thereof Download PDFInfo
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- CN102351551B CN102351551B CN 201110200605 CN201110200605A CN102351551B CN 102351551 B CN102351551 B CN 102351551B CN 201110200605 CN201110200605 CN 201110200605 CN 201110200605 A CN201110200605 A CN 201110200605A CN 102351551 B CN102351551 B CN 102351551B
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- groove
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Abstract
The invention discloses an energy-saving swing-groove for a continuous casting tundish and a preparation method thereof. Raw materials for the swing-groove comprise aggregate prepared from used refractory materials discarded in steel mills and fine powder of recovered materials, with the rest being additives. The preparation method for the swing-groove comprises the following steps: weighing the raw materials by weight, adding the raw materials and water into a sand mixer for stirring, gradually adding stirred mud into a mold, and carrying out vibration at the same time; maintaining a green body with the mold obtained after molding in natural environment; roasting a product obtained after natural maintenance in a drying room, cooling the product to a room temperature after roasting is finished, and carrying out packaging to obtain a finished product. According to the invention, resources are saved, sources of pollution to environment are reduced, and reutilization of used refractory materials is realized; product cost for the finished product in the invention decreases by more than 50% compared to product cost for conventional swing-grooves for continuous casting tundishs.
Description
Technical field
The invention belongs to the metallurgical casting field, relate to a kind of swing-groove for continuous casting tundish and preparation method thereof that is applied in the steelmaking equipment.
Background technology
Continuous small-billet casting generally adopts the metering nozzle pouring technology, compares with stopper control cast, and the metering nozzle pouring technology lacks the beam control device.Open and water when starting, the mode that the groove drainage is repeatedly put in general employing reduces molten steel flow, guarantees fully solidifying of strand in the crystallizer, and with the ingot-guiding head mortise.
Tundish has stopper, slide gate nozzle and three kinds of forms of metering nozzle to crystallizer steel flow control device, adopts the metering nozzle mode to pour into a mould the strand of 120mm * 120mm section, and traditional mode of watering of opening is: when pouring basket liquid level reach a certain height, the centre was unwrapped and watered.Connect away with the pendulum groove first and open first the molten steel that waters, behind steel rheology circle, remove the pendulum groove and inject molten steel to crystallizer, when the molten steel in mold level reaches the 200mm left and right sides, swing in the pendulum groove, stop in crystallizer, injecting molten steel and opening cold water.Interval 5～15s arranges the pendulum groove, injects molten steel to crystallizer again, and 2～4 times so repeatedly, when mold liquid level distance 80～100mm suitable for reading, the pendulum groove swings in, and opens and waters, and when mold liquid level descended, the pendulum groove was arranged, and molten steel enters crystallizer, the normal cast.
Mostly all directly discarding with refractory after present domestic steel mill uses, recovery utilization rate only has 20%, and our company has manufactured continuous casting tundish pendulum groove by to the research with refractory with refractory.Through the high temperature sintering homogenization process, its result of use is better than the ecosystem material with refractory.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of refractory materials that utilizes after steel mill uses, and effectively reduces production costs, and the material that economizes on resources reduces swing-groove for continuous casting tundish of source of pollution and preparation method thereof.
A kind of energy-saving swing-groove for continuous casting tundish is characterized in that its component and content are:
Component particle diameter content (weight ratio)
Recovery aggregate 5mm≤≤ 8mm 15 ~ 18%
3mm≤ ＜5mm 15~20%
1mm≤ ＜3mm 14~19%
0.5 mm＜ ＜1mm 8~12%
Reclaimed materials fine powder order number≤320 22 ~ 26%
Additive: comprise
Luminite cement 5 ~ 10%
Fine silica powder 3 ~ 8%
Kyanite 2 ~ 5%
Heat-resistance stainless steel steel fiber 0.8 ~ 1.5%
Tripoly phosphate sodium STPP 0.2-1.2%.
The physical and chemical index of above-mentioned recovery aggregate and recovery fine powder reaches Al
2O
3〉=70%, Fe
2O
3≤ 2%; Reclaimed materials fine powder order number≤320 orders.
The present invention also provides the preparation method of above-mentioned swing-groove for continuous casting tundish, may further comprise the steps:
1) formwork erection at first: mold inner surfaces is cleaned out and evenly coated machine oil.
2) will reclaim aggregate and reclaimed materials fine powder, additive by above-mentioned content weighing, and drop in the sand mill again and stirred 3-5 minute, and then add entry, the add-on of water is the 6-7% of solid component weight, and rear discharging stirs.
3) pug that mixes is added in the model gradually, simultaneously vibration, until expect the position, without obviously exhaust, surperficial bleeding is for well.
4) maintenance and the demoulding: the curing in the mold in physical environment of the base substrate after the moulding, wait to expect abundant sclerosis, carry out again the demoulding, seasoning is 72 hours again.
5) product after the seasoning is packed into drying room toasts.80 ℃ were toasted 12 hours, and 110 ℃ were toasted 22 hours, and 200 ℃ were toasted 10 hours, and 250 ℃ were toasted 10 hours, and 350 ℃ were toasted 12 hours.Baking is cooled to room temperature after finishing, and is finished product after the packing.
The preparation process of above-mentioned recovery aggregate and recovery fine powder is:
1) useless alumina brick, corundum brick, waste material after recovery steel mill uses, the physical and chemical index of waste material should reach Al
2O
3〉=70%, Fe
2O
3≤ 2%.
2) will reclaim the waste materials such as alumina brick, corundum brick and pulverize through jaw crusher and twin rollers successively, crushed material band running roller sand machine is washed, is dried, and removes the Fe in the crushed material again
2O
3And impurity, final sizing, be divided into particle diameter be respectively 5mm≤≤ 8mm, 3mm≤＜5mm, 1mm≤＜3mm, 0 mm＜＜aggregate of 1mm, and order number≤320 purpose reclaimed materials fine powders.
The relative prior art of the present invention has following some advantage:
1, the present invention has utilized steel mill to use the waste materials such as rear discarded refractory materials alumina brick, corundum brick as aggregate, decrease production cost reach more than 50%, adopt rejected material to prepare starting material, saved resource and the energy, greatly reduced environomental pollution source.
2, reclaimed materials makes the swing-groove for continuous casting tundish result of use also good than high energy consumption ecosystem material, and has increased work-ing life because of through reburning the knot homogenization process.
What 3, the utilization recovery was discarded can produce a variety of refractory materialss with refractory, because reclaimed materials passes through the high temperature sintering homogenizing, its performance is better than the ecosystem energy and material, and result of use is better than high energy consumption ecosystem material, is subjected to very much users' welcome.
Embodiment
The present invention is further elaborated below in conjunction with specific embodiment.
Embodiment 1:
Component particle diameter content (weight ratio)
Recovery aggregate 5mm≤≤ 8mm 15%
3mm≤ ＜5mm 20%
1mm≤ ＜3mm 15%
0.5 mm＜ ＜1mm 10%
Reclaimed materials fine powder order number≤320 orders 24%
Additive: comprise
Luminite cement 8%
Fine silica powder 5%
Kyanite 2%
Heat-resistance stainless steel steel fiber 0.8%
Tripoly phosphate sodium STPP 0.2%.
The preparation process of present embodiment:
1) formwork erection at first: machine oil is cleaned out and coated to mold inner surfaces, must evenly and be difficult for too thick.
2) will reclaim aggregate and reclaimed materials powder, additive by above-mentioned content weighing, and drop in the sand mill again and stirred 3-5 minute, and then add entry and then add entry, the add-on of water is the 6-7% of solid component weight, and rear discharging stirs.
3) pug that mixes is added in the model gradually, simultaneously vibration, until expect the position, without obviously exhaust, surperficial bleeding is for well.
4) maintenance and the demoulding: the curing in the mold in physical environment of the base substrate after the moulding, wait to expect abundant sclerosis, carry out again the demoulding, seasoning is 72 hours again.
5) product after the seasoning is packed into drying room toasts.80 ℃ were toasted 12 hours, and 110 ℃ were toasted 22 hours, and 200 ℃ were toasted 10 hours, and 250 ℃ were toasted 10 hours, and 350 ℃ were toasted 12 hours.Baking is cooled to room temperature after finishing, and is finished product after the packing.
Embodiment 2:
Component particle diameter content (weight ratio)
Recovery aggregate 5mm≤≤ 8mm 18%
3mm≤ ＜5mm 15%
1mm≤ ＜3mm 17%
0.5 mm＜ ＜1mm 12%
Reclaimed materials fine powder order number≤320 orders 22%
Additive: comprise
Luminite cement 6%
Fine silica powder 5%
Kyanite 3%
Heat-resistance stainless steel steel fiber 1%
Tripoly phosphate sodium STPP 1%.
The preparation process of present embodiment is with embodiment 1.
Embodiment 3:
Component particle diameter content (weight ratio)
Recovery aggregate 5mm≤≤ 8mm 16%
3mm≤ ＜5mm 17%
1mm≤ ＜3mm 17%
0.5 mm＜ ＜1mm 10%
Reclaimed materials fine powder order number≤320 orders 26%
Additive: comprise
Luminite cement 6%
Fine silica powder 4%
Kyanite 2.5%
Heat-resistance stainless steel steel fiber 1%
Tripoly phosphate sodium STPP 0.5%.
The preparation process of present embodiment is with embodiment 1.
The production method of above-mentioned aggregate is:
The waste materials such as the useless alumina brick after 1) recovery steel mill uses, corundum brick, the physical and chemical index of waste material should reach Al
2O
3〉=70%, Fe
2O
3≤ 2%.What will meet physical and chemical index carries out following process with refractory.
2) refractory materials that reclaims is pulverized through jaw crusher and twin rollers successively, crushed material band running roller sand machine is washed, is dried, and removes the Fe in the crushed material again
2O
3And impurity, final sizing, be divided into particle diameter be respectively 5mm≤≤ 8mm, 3mm≤＜5mm, 1mm≤＜3mm, 0.5 mm＜＜aggregate of four kinds of specifications of 1mm and the reclaimed materials fine powder of order number≤320.
The swing-groove for continuous casting tundish physical and chemical index of the present invention's preparation
Claims (4)
1. energy-saving swing-groove for continuous casting tundish is characterized in that component and content are:
Component particle diameter content weight ratio
Recovery aggregate 5mm≤≤ 8mm 15 ~ 18%
3mm≤ ＜5mm 15~20%
1mm≤ ＜3mm 14~19%
0.5 mm＜ ＜1mm 8~12%
Reclaimed materials fine powder order number≤320 orders 22 ~ 26%
Additive: comprise
Luminite cement 5 ~ 10%
Fine silica powder 3 ~ 8%
Kyanite 2 ~ 5%
Heat-resistance stainless steel steel fiber 0.8 ~ 1.5%
Tripoly phosphate sodium STPP 0.2-1.2%.
2. energy-saving swing-groove for continuous casting tundish according to claim 1 is characterized in that described recovery aggregate and reclaimed materials fine powder all are to obtain through refining with refractory with steel mill to form, and the physical and chemical index that reclaims aggregate and reclaimed materials fine powder is Al
2O
3〉=70%, Fe
2O
3≤ 2.0 %, reclaimed materials fine powder order number≤320 orders.
3. the preparation method of the described energy-saving swing-groove for continuous casting tundish of claim 1 is characterized in that may further comprise the steps:
1) formwork erection is at first cleaned out mold inner surfaces and evenly coat machine oil;
2) will reclaim aggregate and reclaimed materials fine powder, additive by above-mentioned content weighing, and drop in the sand mill again and stirred 3-5 minute, and then add entry, the add-on of water is the 6-7% of solid component weight, and rear discharging stirs;
3) pug that mixes is added in the model gradually, simultaneously vibration, until expect the position, without obviously exhaust, surperficial bleeding is for well;
4) maintenance and the demoulding: the curing in the mold in physical environment of the base substrate after the moulding, wait to expect abundant sclerosis, carry out again the demoulding, seasoning is 72 hours again;
5) product after the seasoning is packed into drying room toasts, 80 ℃ of bakings 12 hours, 110 ℃ of bakings 22 hours, 200 ℃ of bakings 10 hours, 250 ℃ of bakings 10 hours, 350 ℃ of bakings 12 hours; Baking is cooled to room temperature after finishing, and is finished product after the packing.
4. the preparation method of energy-saving swing-groove for continuous casting tundish according to claim 3 is characterized in that step 2) in reclaim aggregate and reclaimed materials fine powder preparation process be:
1) refractory materials after recovery steel mill uses, the physical and chemical index of these refractory materialss should reach Al
2O
3〉=70%, Fe
2O
3≤ 2%;
2) refractory materials that reclaims is pulverized through jaw crusher and twin rollers successively, crushed material band running roller sand machine is washed, is dried, and removes the Fe in the crushed material again
2O
3And impurity, final sizing, be divided into particle diameter be respectively 5mm≤≤ 8mm, 3mm≤＜5mm, 1mm≤＜3mm, 0.5 mm＜＜aggregate of four kinds of specifications of 1mm, and order number≤320 purpose reclaimed materials fine powders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110200605 CN102351551B (en) | 2011-07-18 | 2011-07-18 | Energy-saving swing-groove for continuous casting tundish and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110200605 CN102351551B (en) | 2011-07-18 | 2011-07-18 | Energy-saving swing-groove for continuous casting tundish and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102351551A CN102351551A (en) | 2012-02-15 |
| CN102351551B true CN102351551B (en) | 2013-02-27 |
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|---|---|---|---|
| CN 201110200605 Expired - Fee Related CN102351551B (en) | 2011-07-18 | 2011-07-18 | Energy-saving swing-groove for continuous casting tundish and preparation method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833394B (en) * | 2014-01-08 | 2015-09-09 | 长兴明晟冶金炉料有限公司 | Tundish paint |
| CN114573356A (en) * | 2020-12-01 | 2022-06-03 | 云南濮耐昆钢高温材料有限公司 | Regenerated corundum air-permeable brick cup and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381237A (en) * | 2008-10-23 | 2009-03-11 | 陆建荣 | Environment-friendly type continuous casting dry material for tundish and preparation method thereof |
| CN101580398A (en) * | 2009-06-29 | 2009-11-18 | 河南省耕生耐火材料有限公司 | Ladle kerb casting material and ladle kerb preparation method thereof |
| CN101786891A (en) * | 2010-02-03 | 2010-07-28 | 山东轻工业学院 | Air-set mold bulk material for continuous casting tundish and preparation method thereof |
-
2011
- 2011-07-18 CN CN 201110200605 patent/CN102351551B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381237A (en) * | 2008-10-23 | 2009-03-11 | 陆建荣 | Environment-friendly type continuous casting dry material for tundish and preparation method thereof |
| CN101580398A (en) * | 2009-06-29 | 2009-11-18 | 河南省耕生耐火材料有限公司 | Ladle kerb casting material and ladle kerb preparation method thereof |
| CN101786891A (en) * | 2010-02-03 | 2010-07-28 | 山东轻工业学院 | Air-set mold bulk material for continuous casting tundish and preparation method thereof |
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| CN102351551A (en) | 2012-02-15 |
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