CN101733371B - Function protective materials for oblong taperless steel ingots - Google Patents
Function protective materials for oblong taperless steel ingots Download PDFInfo
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- CN101733371B CN101733371B CN 201010030219 CN201010030219A CN101733371B CN 101733371 B CN101733371 B CN 101733371B CN 201010030219 CN201010030219 CN 201010030219 CN 201010030219 A CN201010030219 A CN 201010030219A CN 101733371 B CN101733371 B CN 101733371B
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Abstract
The invention discloses function protective materials for oblong taperless steel ingots, comprising the following raw materials by weight percent: 10% of quartz powder, 44% of low carbon powder, 6% of meso-carbon powder, 15% of vermiculite, 5% of lime, 10% of fluorite, 5% of aluminum oxide, 3% of dictamnine and 2% of acidized graphite. Adopting the special function protective materials for the oblong taperless steel ingots, the production test of oblong taperless mold-casting technique of Jiangyin Steel Limited Company shows that the surface quality of the oblong steel ingots is remarkably improved, the surface does not have slag pits, slag entrapment and the like, and the heads of the steel ingots do not bubble under the skin any more, thus the requirements of a steel factory are met.
Description
Technical field
The invention belongs to the metallurgic auxiliary materials technical field, particularly a kind of function protective materials for oblong taperless steel ingots.
Background technology
At present, it is reported Long Circle zero draft founding iron mold casting, the whole nation is characterized in that the same thickness in steel ingot the whole body with regard to one of Jiangyin Iron And Steel Co., Ltd, has not a particle of tapering, more than the steel ingot height reaches 5000mm, can be described as a kind of casting method of uniqueness.Understand in detail according to its characteristic and production technology, steel mill requires my company to design and develop a kind of new function protective material, and the function protective material that adapts to the ellipsoid steel ingot casting comes for steel mill.
Casting blank specification: ingot mould internal diameter 810mm
Strand height: 5000mm
Cap open height: 600mm
Two kinds of forms are arranged at the strand bottom: platybasic type and circular arc type.
The different process technology is used contrast:
The platybasic type Above The Ingot Bottom adds cooled plate, cap mouth top is piled and is added the induction heater, do not add exothermic mixture and heat preserving agent during casting, the ingot head opening liner is the knotting refractory material, accepting the high-temp liquid molten steel after heating, and certain heat-insulating property is arranged, satisfy the requirement of steel ingot central part feeding, the above portion of external of ingot mould 1/2 is with asbestos cloth or asbestos cord parcel, to reduce setting rate.
The circular arc steel ingot is the present generally technology of employing basically, and the cap mouth is for strengthening insulation, and employing light thermal insulation type plate adds efficient heat-generating agent with the prolongation feeding time, then adds the coverture insulation, and the above portion of external of steel ingot 1/2 is still with asbestos cloth or asbestos cord parcel.
Calculating casting finishes approximately to need 5～6 hours to the complete setting time of steel ingot, 5～6 hours later demoulding steel ingots are transported to T-shaped and carry out slow cooling across burial pit, burial pit toasts before using, the hole covers to be provided with to burn and chews, but the temperature of dead soaking pit, plan slow cooling more than 48 hours, surface temperature≤150 ℃.Current, also do not have any function protective material to be exclusively used in the direct casting of this kind Long Circle zero draft steel ingot.
Summary of the invention
The objective of the invention is to propose a kind of a kind of new function protective material that adapts to Long Circle zero draft static ingot, solve Long Circle zero draft surface of steel ingot rough, the cosmetic issues such as slag, slag scar are arranged.
A kind of function protective materials for oblong taperless steel ingots; its raw material comprises: silica flour, low carbon dust, middle carbon dust, vermiculite, lime, fluorite, alum clay, white alkali, acidifying graphite, its weight percentage is respectively 10%, 44%, 6%, 15%, 5%, 10%, 5%, 3%, 2%.
SiO in described function protective material
2Weight percentage is 37～43%, Al
2O
3Weight percentage is 9～13%, CaO weight percentage 13～19%, Fe
2O
3Weight percentage is to be less than 6%, C less than 5%, MgO weight percentage
GuWeight percentage 10～14%, dual alkalinity (CaO/SiO
2Weight ratio) be 0.35～0.45, fusing point is 1100～1150 ℃, molten speed 30～50s.
SiO in described function protective material
2Weight percentage is 40%, Al
2O
3Weight percentage is 11%, CaO weight percentage 16%, Fe
2O
3Weight percentage is that 3%, MgO weight percentage is 4%, C
GuWeight percentage 12%, dual alkalinity (CaO/SiO
2Mass ratio) be 0.4, fusing point is 1100～1150 ℃, molten speed 30～50s.
understand according to the examination at scene and on-the-spot tracking, and Long Circle zero draft steel ingot casting production technology is understood in detail, according to the characteristic of different steel grades and water the steel temperature, special high to its 45# steel carbon content of mainly casting, cast temperature is low, the base shell is thick, steel ingot is up to 5 meters, the characteristics such as zero draft and casting time are long, rising to molten steel in casting cycle has certain difficulty, should require bits viscosity low on the mentality of designing of formula for a product, fusing point is low, require function protective material will have greasy property good, good heat insulating, prevent that the molten steel cooling is fast in casting cycle, prevent steel ingot centre contraction.
Through examination and the on-the-spot tracking to the scene; detailed understanding to Long Circle zero draft steel ingot casting production technology; and and the technical staff of steel mill exchange of technology; characteristic and cast temperature according to different steel grades; design and develop out the function protective material that is fit to the casting of Long Circle zero draft static ingot; and require to have reduced loss per ton steel, by original orthodox casting technique ton wasted work energy protective material 2Kg, drop to present Long Circle zero draft die casting process ton wasted work energy protective material 0.5Kg left and right.
Adopt the Long Circle zero draft steel ingot special function protective material of above-mentioned research invention; in Jiangyin Iron And Steel Co., Ltd Long Circle zero draft die casting process pilot production; the Long Circle Ingot Surface Quality is obviously improved; the surface does not have the phenomenons such as pit, slag; subcutaneous foaming phenomenon no longer appears in ingot head, has satisfied the demand of steel mill.
The specific embodiment
Embodiment one
A kind of function protective materials for oblong taperless steel ingots; its raw material comprises: silica flour, low carbon dust, middle carbon dust, vermiculite, lime, fluorite, alum clay, white alkali, acidifying graphite, its weight percentage is respectively 10%, 44%, 6%, 15%, 5%, 10%, 5%, 3%, 2%.
SiO in described function protective material
2Weight percentage is 38%, Al
2O
3Weight percentage is 12%, CaO weight percentage 14%, Fe
2O
3Weight percentage is that 4%, MgO weight percentage is 5%, C
GuWeight percentage 14%, dual alkalinity (CaO/SiO
2Weight ratio) be 0.368, fusing point is 1100～1150 ℃, molten speed 30～50s.
Embodiment two
A kind of function protective materials for oblong taperless steel ingots; its raw material comprises: silica flour, low carbon dust, middle carbon dust, vermiculite, lime, fluorite, alum clay, white alkali, acidifying graphite, its weight percentage is respectively 10%, 44%, 6%, 15%, 5%, 10%, 5%, 3%, 2%.
SiO in described function protective material
2Weight percentage is 42%, Al
2O
3Weight percentage is 10%, CaO weight percentage 15%, Fe
2O
3Weight percentage is that 2%, MgO weight percentage is less than 3%, C
GuWeight percentage 11%, dual alkalinity (CaO/SiO
2Weight ratio) be 0.357, fusing point is 1100～1150 ℃, molten speed 30～50s.
Embodiment three
A kind of function protective materials for oblong taperless steel ingots; its raw material comprises: silica flour, low carbon dust, middle carbon dust, vermiculite, lime, fluorite, alum clay, white alkali, acidifying graphite, its weight percentage is respectively 10%, 44%, 6%, 15%, 5%, 10%, 5%, 3%, 2%.
SiO in described function protective material
2Weight percentage is 40%, Al
2O
3Weight percentage is 11%, CaO weight percentage 16%, Fe
2O
3Weight percentage is that 3%, MgO weight percentage is 4%, C
GuWeight percentage 12%, dual alkalinity (CaO/SiO
2Mass ratio) be 0.4, fusing point is 1100～1150 ℃, molten speed 30～50s.
understand according to the examination at scene and on-the-spot tracking, and Long Circle zero draft steel ingot casting production technology is understood in detail, according to the characteristic of different steel grades and water the steel temperature, special high to its 45# steel carbon content of mainly casting, cast temperature is low, the base shell is thick, steel ingot is up to 5 meters, the characteristics such as zero draft and casting time are long, rising to molten steel in casting cycle has certain difficulty, should require bits viscosity low on the mentality of designing of formula for a product, fusing point is low, require function protective material will have greasy property good, good heat insulating, prevent that the molten steel cooling is fast in casting cycle, prevent steel ingot centre contraction.
Through examination and the on-the-spot tracking to the scene; detailed understanding to Long Circle zero draft steel ingot casting production technology; and and the technical staff of steel mill exchange of technology; characteristic and cast temperature according to different steel grades; design and develop out the function protective material that is fit to the casting of Long Circle zero draft static ingot; and require to have reduced loss per ton steel, by original orthodox casting technique ton wasted work energy protective material 2Kg, drop to present Long Circle zero draft die casting process ton wasted work energy protective material 0.5Kg left and right.
Adopt the Long Circle zero draft steel ingot special function protective material of above-mentioned research invention; in Jiangyin Iron And Steel Co., Ltd Long Circle zero draft die casting process pilot production; the Long Circle Ingot Surface Quality is obviously improved; the surface does not have the phenomenons such as pit, slag; subcutaneous foaming phenomenon no longer appears in ingot head, has satisfied the demand of steel mill.
Claims (1)
1. function protective materials for oblong taperless steel ingots, it is characterized in that: its raw material comprises: silica flour, low carbon dust, middle carbon dust, vermiculite, lime, fluorite, alum clay, white alkali, acidifying graphite, and its weight percentage is respectively 10%, 44%, 6%, 15%, 5%, 10%, 5%, 3%, 2%;
SiO in described function protective material
2Weight percentage is 37～43%, Al
2O
3Weight percentage is that 9～13%, CaO weight percentage is 13～19%, Fe
2O
3Weight percentage is to be less than 6%, C less than 5%, MgO weight percentage
GuWeight percentage is 10～14%, and dual alkalinity is 0.35～0.45, and fusing point is 1100～1150 ℃, and molten speed is 30～50s, and described dual alkalinity is CaO/SiO
2
Mass ratio.
2. function protective materials for oblong taperless steel ingots as claimed in claim 1, is characterized in that: SiO in described function protective material
2Weight percentage is 40%, Al
2O
3Weight percentage is that 11%, CaO weight percentage is 16%, Fe
2O
3Weight percentage is to be less than 4%, C less than 3%, MgO weight percentage
GuWeight percentage is 12%, and dual alkalinity is 0.4, and fusing point is 1100～1150 ℃, and molten speed is 30～50s, and described dual alkalinity is CaO/SiO
2
Mass ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010030219 CN101733371B (en) | 2010-01-21 | 2010-01-21 | Function protective materials for oblong taperless steel ingots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010030219 CN101733371B (en) | 2010-01-21 | 2010-01-21 | Function protective materials for oblong taperless steel ingots |
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| Publication Number | Publication Date |
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| CN101733371A CN101733371A (en) | 2010-06-16 |
| CN101733371B true CN101733371B (en) | 2013-06-26 |
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|---|---|---|---|
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392102B (en) * | 2011-12-16 | 2013-02-06 | 西峡县钰海冶金辅料有限公司 | High-efficient catalytic separating agent |
| CN103981331B (en) * | 2014-04-08 | 2017-02-22 | 河南鹏钰集团有限公司 | Slugging heat storage ball |
| CN109530639A (en) * | 2019-01-23 | 2019-03-29 | 河南凯华环保科技有限公司 | A kind of tundish environment protecting thermal insulating ball and preparation method thereof |
| CN111283151A (en) * | 2020-03-18 | 2020-06-16 | 山西太钢不锈钢股份有限公司 | Method for improving qualified rate of die casting flaw detection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125357A (en) * | 2007-09-18 | 2008-02-20 | 攀钢集团攀枝花钢铁研究院 | Continuous casting crystallizer casting powder for weathering steel and manufacturing method thereof |
| CN101204727A (en) * | 2007-11-30 | 2008-06-25 | 西峡龙成冶金材料有限公司 | Slim slab low carbon steel special for continuous casting crystallizer protected slag and production processes with same |
| CN101214534A (en) * | 2008-01-08 | 2008-07-09 | 河南通宇冶材集团有限公司 | Preliminary melting type continuous casting crystallizer protecting slag and preparation thereof |
| CN101254525A (en) * | 2008-02-22 | 2008-09-03 | 马鞍山钢铁股份有限公司 | Special-shaped continuous casting containing manganses low-alloy high-strength steel crystallizer protection slag |
-
2010
- 2010-01-21 CN CN 201010030219 patent/CN101733371B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125357A (en) * | 2007-09-18 | 2008-02-20 | 攀钢集团攀枝花钢铁研究院 | Continuous casting crystallizer casting powder for weathering steel and manufacturing method thereof |
| CN101204727A (en) * | 2007-11-30 | 2008-06-25 | 西峡龙成冶金材料有限公司 | Slim slab low carbon steel special for continuous casting crystallizer protected slag and production processes with same |
| CN101214534A (en) * | 2008-01-08 | 2008-07-09 | 河南通宇冶材集团有限公司 | Preliminary melting type continuous casting crystallizer protecting slag and preparation thereof |
| CN101254525A (en) * | 2008-02-22 | 2008-09-03 | 马鞍山钢铁股份有限公司 | Special-shaped continuous casting containing manganses low-alloy high-strength steel crystallizer protection slag |
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| CN101733371A (en) | 2010-06-16 |
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