CN105081296A - Tundish manufacturing technology - Google Patents
Tundish manufacturing technology Download PDFInfo
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- CN105081296A CN105081296A CN201510513010.XA CN201510513010A CN105081296A CN 105081296 A CN105081296 A CN 105081296A CN 201510513010 A CN201510513010 A CN 201510513010A CN 105081296 A CN105081296 A CN 105081296A
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- tundish
- loose tool
- dry materials
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- pocket block
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Abstract
The invention discloses a tundish manufacturing technology. The tundish manufacturing technology includes the steps of tundish bottom construction, side wall construction, solidification heating and cooling die drawing. Specifically, a permanent layer of a tundish and the surface of a forming die are cleaned up, an impact plate and a pocket block are installed at the bottom of the tundish, and dry materials are poured into the bottom of the tundish, scraped to be flat and compacted; the forming die is placed in the middle of the tundish, dry materials are poured into the gap between the forming die and the permanent layer till the whole gap is filled with the dry materials, and a vibrating motor in the forming die is started to perform vibrating tamping; then the whole tundish is roasted to be formed; and finally, natural cooling is performed, the forming die is automatically separated from a working layer made of the dry materials, and the forming die is drawn out to complete manufacturing of the tundish. According to the tundish manufacturing technology, the dry materials are adopted for manufacturing the working layer of the tundish, so that the structural strength of the tundish is improved, fracture or collapse is avoided, the high temperature performance is good, and contamination to molten steel from low-melting matter is avoided.
Description
Technical field
The present invention relates to STEELMAKING PRODUCTION equipment technical field, particularly relate to a kind of tundish manufacture craft.
Background technology
Tundish is the refractory material containers used in mini-mill steelmaking, first accepts to water from ladle the molten steel got off, and then is assigned in each crystallizer by middle water containing opening and goes.Compare with traditional die casting, continuous casting has and improves recovery rate of iron and reduce the superiority of energy ezpenditure, and the consumption reducing metals resources and energy meets sustainable development and requires.The realization of sequence casting makes STEELMAKING PRODUCTION operation simplify, and flow process shortens, and production efficiency significantly improves.Tundish is the intermediate link of STEELMAKING PRODUCTION flow process, and is the connecting points being turned to continued operation by intermittently operated.Tundish is the important ring improving output of steel and quality as metallurgical reaction.No matter carrying out smoothly for continuous casting operation, or guarantee molten steel quality is suited the requirements, the effect of tundish is very important.
Day by day improve along with to the quality requirement of steel, develop various ladle refining techniques, its object improves cleanliness factor exactly, and molten steel is done " totally " a bit.Molten steel through external refining can be described as " totally ", but may pollute again after watering tundish again.Therefore, tundish can not be look at is a simple molten steel transition container, and it should to be look at be a continuous print metallurgical reaction.Tundish is according to being divided into low life-span tundish and long-life tundish two type the duration of pouring, traditional low life-span tundish adopts silica heat-insulating plate material, be no more than 9 hours the duration of pouring, with long-life tundish (wrapping in 30 hours magnesium dry-type stocks) with the use of, be conducive to STEELMAKING PRODUCTION tissue and overhaul of the equipments arrangement.But heat-insulating shield tundish exists compressive resistance low and high temperature poor-performing, the easy drawback polluting molten steel, in use also often there is the rear heat-insulating shield fracture of baking, collapse phenomenon, affects the normal use of tundish.
Summary of the invention
The technical assignment of technical problem to be solved by this invention and proposition improves prior art, a kind of tundish manufacture craft is provided, solving tundish in current technology adopts heat-insulating plate structure to make, compressive resistance low and high temperature poor-performing, easily pollute molten steel, easy fracture after baking, the problem collapsed.
For solving above technical problem, technical scheme of the present invention is:
A kind of tundish manufacture craft, comprise bag bottom application work, sidewall construction, solidification heating and cooling withdrawing pattern, it is characterized in that, bag end construction procedure comprises:
A. the permanent layer of tundish is cleaned out, and by clean for loose tool removing surface;
B. shock plate and pocket block is installed at tundish bottom;
C. pour dry materials into tundish bottom, scrape smooth and compacting, around shock plate and pocket block, ramming is tight;
Sidewall construction procedure comprises:
D. loose tool is placed in tundish, loose tool maintenance level is not tilted, and makes loose tool be positioned at the center of tundish, ensure that loose tool surrounding is identical with the gap width symmetry of tundish permanent layer, to avoid the liner in dundish uneven thickness occurring having constructed;
E. pour dry materials into the gap between loose tool and permanent layer to filling up whole gap, the packed height of dry materials is concordant with permanent layer;
F. the vibrating motor started in loose tool carries out mechanical pudding;
Solidification heating steps comprises:
G., after having vibrated, whole tundish is carried out baking molding;
Cooling withdrawing pattern step comprises:
H. carry out nature cooling, the working lining AUTOMATIC ZONING that loose tool and dry materials are made, loose tool has been extracted the making of tundish.
Tundish manufacture craft of the present invention adopts dry materials to make the working lining of tundish, improves the structural strength of working lining, the situation of there will not be fracture, caving in, and high-temperature behavior is better, avoids the pollution of eutectic to molten steel.And can rapid construction, greatly reduce the labour intensity of workman, decrease the potential safety hazard that human factor is brought.Can come into operation without the need to baking for a long time, reduce energy consumption, accelerate the turnaround speed of tundish greatly.
Further, before clearing up tundish in described steps A, the temperature of tundish need be reduced to less than 50 DEG C, and loose tool surrounded surface painting last layer is after cleaning blunged, uniform graphite powder is conveniently stripped.
Further, bag bottom application man-hour is being carried out in described step C, the endoporus article of pocket block clog, prevent from bag bottom application man-hour from spilling from pocket block hole dry materials or dry materials to flow in the mouth of a river and block the mouth of a river, the height of dry materials, higher than the upper surface 50 ~ 60mm of pocket block, is filled and led up suitable for reading for pocket block.The construction height of dry materials is a little more than the upper level of pocket block, be conducive to loose tool so fully to contact with bag bottom material, thus the effective tamping of working lining that during follow-up vibration, dry materials formed can be made, improve structural strength, the generation of situation that avoiding ruptures subsides.
Further, evenly pour into the sidewall diverse location along tundish during the batch turning of gap in described step e, and drag along loose tool surrounding with waddy or the vibrating head of minor diameter, material is fully vented thus fine and close, be conducive to the segregation reducing material in loose tool vibration processes simultaneously, the density of further raising dry materials working lining, improves structural strength, prevents from subsiding.
Further, in described step F, time of vibration is 15 ~ 20 minutes, guarantees effective for dry materials working lining tamping, avoids working lining to there is empty bag and loose position.
Further, in described step G, tundish is lifted on baking rack, first light a fire during baking, then turn on the gas, loose tool temperature controls between 250 ~ 300 DEG C, baking time 1.5 ~ 2 hours, makes the effective curing molding of dry materials reach required structural strength.
Further, with driving, loose tool is pulled up in described step H, give way and reach directly over tundish, prevent working lining to damage, take out the article in pocket block endoporus after withdrawing pattern, the mouth of a river is cleaned out.
Compared with prior art, the invention has the advantages that:
The phenomenons such as tundish manufacture craft of the present invention changes the working lining of tundish into dry materials by heat-insulating shield and makes, and working lining intensity improves, and the heat-insulating shield avoiding often appearance in bake process ruptures, collapse, ensure that the normal use of tundish;
Dry materials resistance to elevated temperatures is better, avoids eutectic in heat-insulating shield and, to the pollution of molten steel, can also adsorb nonmetal inclusion in molten steel simultaneously, improve Cleanliness of Molten Steel;
Shorten baking time, under accident condition can be met, change bag needs temporarily.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Disclosed in the embodiment of the present invention, a kind of tundish manufacture craft makes working lining with dry materials, improve the structural strength of working lining, the situation of there will not be fracture, caving in, high-temperature behavior is better, avoid the pollution of eutectic to molten steel, nonmetal inclusion in molten steel can also be adsorbed simultaneously, improve Cleanliness of Molten Steel.
A kind of tundish manufacture craft, comprise bag bottom application work, sidewall construction, solidification heating and cooling withdrawing pattern, bag end construction procedure comprises:
A. the temperature of tundish first needs to be reduced to less than 50 DEG C, cleans out the permanent layer of tundish, and loose tool removing surface is clean, and it is conveniently stripped that loose tool surrounded surface is coated with last layer uniform graphite powder of blunging;
B. shock plate and pocket block is installed at tundish bottom;
C. the endoporus article of pocket block clog, prevent from bag bottom application man-hour from spilling from pocket block hole dry materials or dry materials to flow in the mouth of a river and block the mouth of a river, dry materials is poured into tundish bottom, the height of dry materials is higher than the upper surface 50 ~ 60mm of pocket block, fill and lead up suitable for reading for pocket block, material construction height requires the upper level a little more than pocket block, and being conducive to loose tool so fully can contact with bag bottom material.Then thickness according to the design bag end evenly pour dry materials into from one section to another section to the bag end, Deng bag the end be finished down material after with spade will wrap the end try one's best flatten, bag base pressure is put down by available pin or other utensils more afterwards, and by tight for ramming around shock plate and pocket block;
Sidewall construction procedure comprises:
D. loose tool is placed in tundish, loose tool maintenance level is not tilted, and makes loose tool be positioned at the center of tundish, ensure that loose tool surrounding is identical with the gap width symmetry of tundish permanent layer, to avoid the liner in dundish uneven thickness occurring having constructed;
E. dry materials is poured into the gap between loose tool and permanent layer to filling up whole gap, the packed height of dry materials is concordant with permanent layer, evenly pour into the sidewall diverse location along tundish during the batch turning of gap, and drag along loose tool surrounding with waddy or the vibrating head of minor diameter, material is fully vented thus fine and close, is conducive to the segregation reducing material in loose tool vibration processes simultaneously;
F. the vibrating motor started in loose tool carries out mechanical pudding, and time of vibration is 15 ~ 20 minutes, effective tamping, avoids free bag and loose position, improves structural strength;
Solidification heating steps comprises:
G. after having vibrated, whole tundish is carried out baking molding, by tundish lifting on baking rack, first light a fire during baking, then turn on the gas, loose tool temperature controls between 250 ~ 300 DEG C, baking time 1.5 ~ 2 hours;
Cooling withdrawing pattern step comprises:
H. nature cooling is carried out, the working lining AUTOMATIC ZONING that loose tool and dry materials are made, loose tool cool time is at 2 hours, concrete observed result, when by the time dry materials and mould have a part fine gap, being pulled up by loose tool, giving way and reaching directly over tundish after loose tool cooling with driving a vehicle, working lining is prevented to damage, take out the article in pocket block endoporus after withdrawing pattern, the mouth of a river is cleaned out, finally complete the making of tundish.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred embodiment should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a tundish manufacture craft, comprise bag bottom application work, sidewall construction, solidification heating and cooling withdrawing pattern, it is characterized in that, bag end construction procedure comprises:
A. the permanent layer of tundish is cleaned out, and by clean for loose tool removing surface;
B. shock plate and pocket block is installed at tundish bottom;
C. pour dry materials into tundish bottom, scrape smooth and compacting, around shock plate and pocket block, ramming is tight;
Sidewall construction procedure comprises:
D. loose tool is placed in tundish, loose tool maintenance level is not tilted, and makes loose tool be positioned at the center of tundish, ensure that loose tool surrounding is identical with the gap width symmetry of tundish permanent layer;
E. pour dry materials into the gap between loose tool and permanent layer to filling up whole gap, the packed height of dry materials is concordant with permanent layer;
F. the vibrating motor started in loose tool carries out mechanical pudding;
Solidification heating steps comprises:
G., after having vibrated, whole tundish is carried out baking molding;
Cooling withdrawing pattern step comprises:
H. carry out nature cooling, the working lining AUTOMATIC ZONING that loose tool and dry materials are made, loose tool has been extracted the making of tundish.
2. tundish manufacture craft according to claim 1, it is characterized in that, before clearing up tundish in described steps A, the temperature of tundish need be reduced to less than 50 DEG C, the uniform graphite powder and loose tool surrounded surface painting last layer is after cleaning blunged.
3. tundish manufacture craft according to claim 1, it is characterized in that, bag bottom application man-hour is being carried out in described step C, the endoporus article of pocket block clog, prevent from bag bottom application man-hour from spilling from pocket block hole dry materials or dry materials to flow in the mouth of a river and block the mouth of a river, the height of dry materials, higher than the upper surface 50 ~ 60mm of pocket block, is filled and led up suitable for reading for pocket block.
4. tundish manufacture craft according to claim 1, it is characterized in that, evenly pour into the sidewall diverse location along tundish during the batch turning of gap in described step e, and drag along loose tool surrounding with waddy or the vibrating head of minor diameter, material is fully vented thus fine and close.
5. tundish manufacture craft according to claim 1, is characterized in that, in described step F, time of vibration is 15 ~ 20 minutes.
6. tundish manufacture craft according to claim 1, is characterized in that, lifts tundish on baking rack, first light a fire during baking in described step G, then turn on the gas, and loose tool temperature controls between 250 ~ 300 DEG C, baking time 1.5 ~ 2 hours.
7. tundish manufacture craft according to claim 1, is characterized in that, is pulled up by loose tool in described step H with driving, give way and reach directly over tundish, prevent working lining to damage, take out the article in pocket block endoporus after withdrawing pattern, the mouth of a river is cleaned out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510513010.XA CN105081296A (en) | 2015-08-20 | 2015-08-20 | Tundish manufacturing technology |
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| CN201510513010.XA CN105081296A (en) | 2015-08-20 | 2015-08-20 | Tundish manufacturing technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105777158A (en) * | 2016-03-17 | 2016-07-20 | 曹涛源 | Siliceous dry material for tundish for steel smelting as well as production method and construction method |
| CN107470607A (en) * | 2017-08-31 | 2017-12-15 | 云南濮耐昆钢高温材料有限公司 | A kind of tundish dry material construction technology for effectively improving consistency and intensity |
| CN111014637A (en) * | 2019-12-28 | 2020-04-17 | 攀钢集团西昌钢钒有限公司 | Carbon-free dry material knotting process for tundish working layer |
| CN112792329A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | Warning brick for tundish working lining and preparation method thereof |
| CN116041048A (en) * | 2023-03-20 | 2023-05-02 | 河北国亮新材料股份有限公司 | Magnesium aluminum dry material for continuous casting tundish |
| CN116921660A (en) * | 2023-09-19 | 2023-10-24 | 山东国茂冶金材料有限公司 | Pouring forming die and method for tundish lining |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105777158A (en) * | 2016-03-17 | 2016-07-20 | 曹涛源 | Siliceous dry material for tundish for steel smelting as well as production method and construction method |
| CN107470607A (en) * | 2017-08-31 | 2017-12-15 | 云南濮耐昆钢高温材料有限公司 | A kind of tundish dry material construction technology for effectively improving consistency and intensity |
| CN111014637A (en) * | 2019-12-28 | 2020-04-17 | 攀钢集团西昌钢钒有限公司 | Carbon-free dry material knotting process for tundish working layer |
| CN112792329A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | Warning brick for tundish working lining and preparation method thereof |
| CN116041048A (en) * | 2023-03-20 | 2023-05-02 | 河北国亮新材料股份有限公司 | Magnesium aluminum dry material for continuous casting tundish |
| CN116921660A (en) * | 2023-09-19 | 2023-10-24 | 山东国茂冶金材料有限公司 | Pouring forming die and method for tundish lining |
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Application publication date: 20151125 |
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