CN106623831A - Preparation method of high-iron-content continuous casting mold fluxes for laboratory - Google Patents
Preparation method of high-iron-content continuous casting mold fluxes for laboratory Download PDFInfo
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- CN106623831A CN106623831A CN201611224216.1A CN201611224216A CN106623831A CN 106623831 A CN106623831 A CN 106623831A CN 201611224216 A CN201611224216 A CN 201611224216A CN 106623831 A CN106623831 A CN 106623831A
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- continuous casting
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- iron
- covering slag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
Abstract
The invention discloses a preparation method of high-iron-content continuous casting mold fluxes for a laboratory, and belongs to the technical field of metallurgy. The preparation method of the high-iron-content continuous casting mold fluxes for the laboratory comprises the following specific steps that 1, high-iron-content continuous casting mold fluxes for production are pretreated and then put into a crucible; 2, the high-iron-content continuous casting mold fluxes are heated to 1,500 DEG C to 1,700 DEG C under nitrogen protection; 3, a cosolvent is added after the high-iron-content continuous casting mold fluxes are stirred to be uniform, and the constant temperature continues to be kept for 5-10 min; 4, powder diffraction detection is conducted through a multifunctional X-ray diffraction instrument. According to the preparation method, the high-iron-content continuous casting mold fluxes are added on molten steel in a crystallizer, a liquid flux layer with the certain thickness is formed after the high-iron-content continuous casting mold fluxes are molten, the molten steel is uniformly covered with the liquid flux layer, and then secondary oxidation of the molten steel, particularly the crescent moon surface of the molten steel is prevented; a three-layer structure or multi-layer structure is formed on the molten steel, therefore, the radiation heat loss of the molten steel can be reduced, and the superheat degree of the molten steel can be decreased; in addition, sampling does not need to be conducted in a production field, and therefore the problem that high-iron-content sampling is difficult is avoided; meanwhile, the production cost is reduced, and the waste problem is avoided.
Description
Technical field
The present invention relates to metallurgical technology field, specially a kind of preparation side of use for laboratory high Fe content continuous casting covering slag
Method.
Background technology
In recent years, developing rapidly with iron and steel metallurgical industry, the exploitation and popularization and application of continuous casting technology have become optimization
China's continuous casting technology, improves the important development direction of Continuous Casting Level.Protect as the continuous cast mold of the important auxiliary material of metallurgical continuous casting
Slag, plays an important role in continuous casting production process, has material impact to slab quality and continuous casting process direct motion.
With the continuous development of metallurgical industry, the type of covering slag is more and more various, wherein the content range of each element
Constantly extension, contrasts the revision of standard system, laboratory capabilities is related to, and during technological parameter research, it is especially desirable to some productions
The middle covering slag sample using less high iron content or extremely low iron content, and the covering slag of high Fe content is applied aborning
It is less, only manufactured experimently with small lot as scientific research, it is difficult to sample, to standard customization, laboratory capabilities than reciprocity numerous research work
Trouble is caused, if do not sampled from production scene, and raw mineral materials proportioning, fusing, water quenching is used according to required composition range,
And it is levigate be prepared, first relatively costly, second preparation amount is big, greatly waste is caused, for this purpose, we have proposed one kind
The preparation method of use for laboratory high Fe content continuous casting covering slag comes into operation, to solve the above problems.
The content of the invention
It is an object of the invention to provide a kind of preparation method of use for laboratory high Fe content continuous casting covering slag, with solution
The covering slag of the high Fe content proposed in background technology is stated aborning using less, is only manufactured experimently with small lot as scientific research, it is difficult
To sample, trouble is caused than reciprocity numerous research work to standard customization, laboratory capabilities, if do not taken from production scene
Sample, and according to required composition range use raw mineral materials proportioning, fusing, water quenching, and it is levigate be prepared, it is first relatively costly,
Second preparation amount is big, causes the problem of great waste.
For achieving the above object, the present invention provides following technical scheme：A kind of use for laboratory high Fe content continuous casting covering slag
Preparation method, the preparation method of the use for laboratory high Fe content continuous casting covering slag comprises the following steps that：
S1：By the high Fe content continuous casting covering slag of production is in 1300～1500 DEG C of complete fritting and cools down, through pre- place
It is put into crucible after reason；
S2：Graphite crucible is socketed in crucible outer wall, and graphite funnel is installed additional in crucible top, be subsequently placed into heater
Big graphite crucible in, and be heated to 1500～1700 DEG C under nitrogen protection, 10～15min of constant temperature；
S3：Continuous casting covering slag inside addition melting rate modifier after constant temperature process again in crucible, adds again after stirring
Cosolvent, and continue 5～10min of constant temperature；
S4：It is levigate to be screened to below 200 mesh after style cooling, powder diffraction is carried out using Multi-functional X ray diffractometer
Detection.
Preferably, in step S1, the continuous casting covering slag after fritting is cooled down is carried out into break process, and utilization is ground
Grinding machine is ground process, is filtered using 200 mesh sieves.
Preferably, in step S2, heater is high temperature carbon shirt-circuiting furnace.
Preferably, in step S3, melting rate modifier is carbon materials, and cosolvent is calcium oxide or calcirm-fluoride or oxidation
One kind in manganese.
Preferably, in step S4, the test condition of diffraction detection is under the conditions of Cu target emanations, to sweep survey scope：20
～95 °, 0.017～0.02 °/step is spaced, and is continuously scanned.
Compared with prior art, the invention has the beneficial effects as follows：The present invention is added on the molten steel in crystallizer, after fusing
Form certain thickness liquid slag layer and uniform fold is on molten steel, prevent molten steel to be particularly the secondary oxidation of molten steel meniscus, and
Three layers or sandwich construction are formed on molten steel, the radiation heat loss of molten steel can be reduced, reduce the degree of superheat of molten steel, and without the need for from life
Produce field sampling, it is to avoid high Fe content samples rare problem, while reducing production cost, it is to avoid waste problem.
Description of the drawings
Fig. 1 is workflow diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one
A kind of preparation method of use for laboratory high Fe content continuous casting covering slag, the use for laboratory high Fe content continuous casting covering slag
Preparation method comprise the following steps that：
S1：By the high Fe content continuous casting covering slag of production is in 1300 DEG C of complete fritting and cools down, put after pretreatment
In entering crucible, the continuous casting covering slag after fritting is cooled down is carried out into break process, and process is ground using grinder, made
Filtered with 200 mesh sieves；
S2：Graphite crucible is socketed in crucible outer wall, and graphite funnel is installed additional in crucible top, be subsequently placed into heater
Big graphite crucible in, and be heated to 1500 DEG C under nitrogen protection, constant temperature 10min, heater is high temperature carbon shirt-circuiting furnace；
S3：Continuous casting covering slag inside addition melting rate modifier after constant temperature process again in crucible, adds again after stirring
Cosolvent, and continue constant temperature 5min, melting rate modifier is carbon materials, and cosolvent is in calcium oxide or calcirm-fluoride or manganese oxide
It is a kind of；
S4：It is levigate to be screened to below 200 mesh after style cooling, powder diffraction is carried out using Multi-functional X ray diffractometer
Detection, the test condition of diffraction detection is under the conditions of Cu target emanations, to sweep survey scope：20 °, the 0.017 °/step in interval, and continuously
Scanning.
Embodiment two
A kind of preparation method of use for laboratory high Fe content continuous casting covering slag, the use for laboratory high Fe content continuous casting covering slag
Preparation method comprise the following steps that：
S1：By the high Fe content continuous casting covering slag of production is in 1500 DEG C of complete fritting and cools down, put after pretreatment
In entering crucible, the continuous casting covering slag after fritting is cooled down is carried out into break process, and process is ground using grinder, made
Filtered with 200 mesh sieves；
S2：Graphite crucible is socketed in crucible outer wall, and graphite funnel is installed additional in crucible top, be subsequently placed into heater
Big graphite crucible in, and be heated to 1700 DEG C under nitrogen protection, constant temperature 15min, heater is high temperature carbon shirt-circuiting furnace；
S3：Continuous casting covering slag inside addition melting rate modifier after constant temperature process again in crucible, adds again after stirring
Cosolvent, and continue constant temperature 10min, melting rate modifier is carbon materials, and cosolvent is in calcium oxide or calcirm-fluoride or manganese oxide
One kind；
S4：It is levigate to be screened to below 200 mesh after style cooling, powder diffraction is carried out using Multi-functional X ray diffractometer
Detection, the test condition of diffraction detection is under the conditions of Cu target emanations, to sweep survey scope：95 °, the 0.02 °/step in interval, and continuously
Scanning.
Embodiment three
A kind of preparation method of use for laboratory high Fe content continuous casting covering slag, the use for laboratory high Fe content continuous casting covering slag
Preparation method comprise the following steps that：
S1：By the high Fe content continuous casting covering slag of production is in 1400 DEG C of complete fritting and cools down, put after pretreatment
In entering crucible, the continuous casting covering slag after fritting is cooled down is carried out into break process, and process is ground using grinder, made
Filtered with 200 mesh sieves；
S2：Graphite crucible is socketed in crucible outer wall, and graphite funnel is installed additional in crucible top, be subsequently placed into heater
Big graphite crucible in, and be heated to 1600 DEG C under nitrogen protection, constant temperature 13min, heater is high temperature carbon shirt-circuiting furnace；
S3：Continuous casting covering slag inside addition melting rate modifier after constant temperature process again in crucible, adds again after stirring
Cosolvent, and continue constant temperature 8min, melting rate modifier is carbon materials, and cosolvent is in calcium oxide or calcirm-fluoride or manganese oxide
It is a kind of；
S4：It is levigate to be screened to below 200 mesh after style cooling, powder diffraction is carried out using Multi-functional X ray diffractometer
Detection, the test condition of diffraction detection is under the conditions of Cu target emanations, to sweep survey scope：70 °, the 0.018 °/step in interval, and continuously
Scanning.
Described in comprehensive above example, highly preferred embodiment of the present invention is embodiment three, and the present invention is added in crystallizer
Molten steel on, certain thickness liquid slag layer and uniform fold are formed after fusing on molten steel, prevent molten steel to be particularly molten steel bent moon
The secondary oxidation in face, and three layers or sandwich construction are formed on molten steel, the radiation heat loss of molten steel can be reduced, reduce the mistake of molten steel
Temperature, and without the need for from production scene sampling, it is to avoid high Fe content samples rare problem, while reduce production cost, it is to avoid
Waste problem.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (5)
1. a kind of preparation method of use for laboratory high Fe content continuous casting covering slag, it is characterised in that：The use for laboratory high Fe content
The preparation method of continuous casting covering slag is comprised the following steps that：
S1：By the high Fe content continuous casting covering slag of production is in 1300～1500 DEG C of complete fritting and cools down, after pretreatment
In being put into crucible；
S2：Graphite crucible is socketed in crucible outer wall, and graphite funnel is installed additional in crucible top, be subsequently placed into big in heater
In graphite crucible, and 1500～1700 DEG C are heated under nitrogen protection, 10～15min of constant temperature；
S3：Continuous casting covering slag inside addition melting rate modifier after constant temperature process again in crucible, adds again hydrotropy after stirring
Agent, and continue 5～10min of constant temperature；
S4：It is levigate to be screened to below 200 mesh after style cooling, powder diffraction inspection is carried out using Multi-functional X ray diffractometer
Survey.
2. the preparation method of a kind of use for laboratory high Fe content continuous casting covering slag according to claim 1, it is characterised in that：
In step S1, the continuous casting covering slag after fritting is cooled down is carried out into break process, and place is ground using grinder
Reason, is filtered using 200 mesh sieves.
3. the preparation method of a kind of use for laboratory high Fe content continuous casting covering slag according to claim 1, it is characterised in that：
In step S2, heater is high temperature carbon shirt-circuiting furnace.
4. the preparation method of a kind of use for laboratory high Fe content continuous casting covering slag according to claim 1, it is characterised in that：
In step S3, melting rate modifier is carbon materials, and cosolvent is calcium oxide or calcirm-fluoride or the one kind in manganese oxide.
5. the preparation method of a kind of use for laboratory high Fe content continuous casting covering slag according to claim 1, it is characterised in that：
In step S4, the test condition of diffraction detection is under the conditions of Cu target emanations, to sweep survey scope：20～95 °, interval 0.017
～0.02 °/step, and continuously scan.
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|---|---|---|---|---|
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| JPH1058103A (en) * | 1996-08-20 | 1998-03-03 | Nippon Steel Metal Prod Co Ltd | Method for melt-testing mold flux and mold for taking observing sample |
| 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 |
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| CN101530896A (en) * | 2008-03-14 | 2009-09-16 | 宝山钢铁股份有限公司 | High casting speed continuous casting covering slag used for ultra-low-carbon steel |
| CN101658907A (en) * | 2009-09-16 | 2010-03-03 | 河南通宇冶材集团有限公司 | Protective slag of large-profile round billet continuous-casting crystallizer and method for preparing same |
| CN102059329A (en) * | 2009-11-11 | 2011-05-18 | 杨忠鑫 | Tundish covering agent |
| CN102495096A (en) * | 2011-12-06 | 2012-06-13 | 首钢总公司 | Method for determining melting behavior and melting point of slag-like material |
| CN102794419A (en) * | 2012-08-08 | 2012-11-28 | 江苏大学 | Fluorine-free sodium-free ladle covering agent |
| CN102879130A (en) * | 2012-09-19 | 2013-01-16 | 中南大学 | Continuous-casting casting powder comprehensive heat transfer heat flow testing method |
| CN103447489A (en) * | 2013-09-12 | 2013-12-18 | 武汉钢铁(集团)公司 | Method for preparing high-iron-content continuous casting mold flux for laboratory |
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Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE855895A (en) * | 1977-06-20 | 1977-10-17 | Centre Rech Metallurgique | PROCESS FOR CONTROL OF THE QUALITY OF COVERING POWDERS INTENDED FOR THE CONTINUOUS CASTING OF METALS AND IN PARTICULAR OF STEEL |
| JPH1058103A (en) * | 1996-08-20 | 1998-03-03 | Nippon Steel Metal Prod Co Ltd | Method for melt-testing mold flux and mold for taking observing sample |
| 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 |
| CN101530896A (en) * | 2008-03-14 | 2009-09-16 | 宝山钢铁股份有限公司 | High casting speed continuous casting covering slag used for ultra-low-carbon steel |
| CN101433950A (en) * | 2008-12-03 | 2009-05-20 | 宜兴市振球炉料有限公司 | Method for preparing protecting residue from recovery refining slag |
| CN101658907A (en) * | 2009-09-16 | 2010-03-03 | 河南通宇冶材集团有限公司 | Protective slag of large-profile round billet continuous-casting crystallizer and method for preparing same |
| CN102059329A (en) * | 2009-11-11 | 2011-05-18 | 杨忠鑫 | Tundish covering agent |
| CN102495096A (en) * | 2011-12-06 | 2012-06-13 | 首钢总公司 | Method for determining melting behavior and melting point of slag-like material |
| CN102794419A (en) * | 2012-08-08 | 2012-11-28 | 江苏大学 | Fluorine-free sodium-free ladle covering agent |
| CN102879130A (en) * | 2012-09-19 | 2013-01-16 | 中南大学 | Continuous-casting casting powder comprehensive heat transfer heat flow testing method |
| CN103447489A (en) * | 2013-09-12 | 2013-12-18 | 武汉钢铁(集团)公司 | Method for preparing high-iron-content continuous casting mold flux for laboratory |
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