CN107414045A - A kind of tundish covering flux - Google Patents
A kind of tundish covering flux Download PDFInfo
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- CN107414045A CN107414045A CN201710510109.3A CN201710510109A CN107414045A CN 107414045 A CN107414045 A CN 107414045A CN 201710510109 A CN201710510109 A CN 201710510109A CN 107414045 A CN107414045 A CN 107414045A
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- covering flux
- tundish covering
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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
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- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a kind of tundish covering flux, belongs to metal smelt auxiliary material technical field.The present invention includes the raw material of following parts by weight, 60~70 portions of major ingredients, 18~20 parts of antifungins, 4~6 parts of gabbros, 2~5 parts of fluorites and 1~3 part of calcium carbonate.The preparation of wherein major ingredient is to be well mixed discarded carclazyte and hydrogen peroxide, heating stirring is carried out, then is filtered while hot, collects filter residue, filter residue is washed using absolute ethyl alcohol, through drying, dried object is collected, dried object, calcium oxide, carbon black are mixed, milled, mill admixture is collected, mill admixture is calcined, collects calcined material；Calcined material is finally subjected to ball milling, ball milling thing is collected, sieving, collects sieving particle and obtain.Tundish covering flux good heat insulating prepared by the present invention, the debris of molten steel can be effectively purified, is had broad application prospects.
Description
Technical field
The present invention relates to a kind of tundish covering flux, belongs to metal smelt auxiliary material technical field.
Background technology
Traditional tundish is a transition container in casting process, only serves uniform molten steel composition and temperature and drop
The effect of pressure, shunting molten steel, removal of inclusions.With the increasingly raising required steel quality, people are in the production procedure of steel
The position of liquid steel refining proposes new view, i.e., using tundish as a refinery reactor between ladle and crystallizer,
Further to improve slab quality.Wherein, during using tundish refined molten steel, tundish covering flux plays important
Effect.During tundish refined molten steel, used coverture should possess following function：（1）Effectively in absorption molten steel
Non-metallic inclusion and tiny fire resisting material particle are to purify molten steel；（2）Completely cut off air to prevent molten steel to be oxidized；（3）It is adiabatic
Insulation is lost with reducing liquid steel temperature；（4）With relatively low dioxide-containing silica with avoid causing molten steel increase silicon.
Tundish covering flux usually used at present can not meet above-mentioned function simultaneously.Although for example, coated among alkalescence
Lid agent can effectively adsorb the Al in molten steel2O3Field trash etc., but its heat insulation effect it is bad and easily cause molten steel crust；Example again
Such as, although acid tundish covering flux has preferable heat insulation effect, it can not effectively purify the field trash in molten steel.
It would therefore be highly desirable to find a kind of high insulating effect, and it can effectively purify the tundish covering flux of molten steel.
The content of the invention
The technical problems to be solved by the invention：It is bad for current tundish covering flux heat insulation effect, it is impossible to effectively
Purification molten steel in debris the problem of, there is provided a kind of tundish covering flux.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
The tundish covering flux of the present invention, include the raw material of following parts by weight, 60~70 portions of major ingredients, 18~20 parts of antifungins, 4
~6 parts of gabbros, 2~5 parts of fluorites and 1~3 part of calcium carbonate.
The preparation of the major ingredient, comprises the following steps：
（1）Discarded carclazyte and hydrogen peroxide are well mixed, stirred at 60~80 DEG C, then is filtered while hot, filter residue is collected, uses nothing
Water-ethanol washs filter residue, re-dry, collects dried object；
（2）Dried object, calcium oxide, carbon black are mixed, milled, mill admixture is collected, mill admixture is calcined,
Collect calcined material；
（3）Calcined material is subjected to ball milling, ball milling thing is collected, sieving, collects sieving particle, you can obtain major ingredient.
The mass ratio of the discarded carclazyte and hydrogen peroxide is 1:4.
The dried object, calcium oxide, the mass ratio of carbon black are 5:4~6:1.1~1.3.
The calcining heat is 1600~1800 DEG C, and calcination time is 2~3h.
Compared with other method, advantageous effects are the present invention：
（1）The present invention, as raw material, reduces cost of manufacture, while utilize the excellent space of discarded carclazyte first from discarded carclazyte
Structure and partial adsorbates performance, primary activation is carried out to it by hydrogen peroxide, by adding calcium oxide, carbon black balances calcium, carbon ratio
Example, melting point is reduced, is mixed by high-temperature calcination, recycle mechanical ball mill further to activate, increase activity, improved in molten steel
Debris detergent power；
（2）The present invention improves the mobile performance of the tundish covering flux under high-temperature fusion by antifungin, improves insulating efficiency, together
Shi Liyong fluorites discharge calcium ion, fluorine ion plasma, can effectively reduce the fusion temperature of tundish covering flux, increase carbonic acid
Calcium increases insulating efficiency to improve carbon, calcium constituent；
（3）After the present invention activates to discarded carclazyte, make discarded carclazyte after heat absorption can rapid expanding, while in antifungin
Under effect, rapid Cover is carried out, improves heat insulation effect and the absorption to debris.
Embodiment
The preparation of major ingredient, comprises the following steps：
（1）Discarded carclazyte is taken to be filtered after carrying out wet concentration removal of impurities, the discarded carclazyte after collection filtering, in mass ratio 1:4, after filtering
Discarded carclazyte and 1.5mol/L hydrogen peroxide be put into mixer, at 60~80 DEG C with 150r/min stir 30~35min, take advantage of
Heat filtering, filter residue is collected, reuse the absolute ethyl alcohol washing filter residue of 3~5 times of filtrate volume, the filter residue after washing is put into 100
2~6h is dried in DEG C baking oven, collects dried object；
（2）In mass ratio 5:4~6:1.1~1.3, dried object, calcium oxide, carbon black are well mixed, be put into grinding mill with
300r/min is milled, and is collected mill admixture, is put into calcining furnace, sets calcining heat as 1600~1800 DEG C, calcining 2
~3h, collect calcined material；
（3）Calcined material is put into ball mill, then 5~7 times of calcined material quality, a diameter of 30mm steel are added into ball mill
Ball, with 500r/min 30~40min of ball milling, 300 mesh sieves are crossed, collect sieving particle, you can obtain major ingredient.
The tundish covering flux of the present invention includes the raw material of following parts by weight, 60~70 portions of major ingredients, 18~20 parts of boric acid
Magnesium, 4~6 parts of gabbros, 2~5 parts of fluorites and 1~3 part of calcium carbonate.
Example 1
The preparation of major ingredient, comprises the following steps：
（1）Discarded carclazyte is taken to be filtered after carrying out wet concentration removal of impurities, the discarded carclazyte after collection filtering, in mass ratio 1:4, after filtering
Discarded carclazyte and 1.5mol/L hydrogen peroxide be put into mixer, at 80 DEG C with 150r/min stir 35min, filter while hot,
Filter residue is collected, the absolute ethyl alcohol washing filter residue of 5 times of filtrate volume is reused, the filter residue after washing is put into 100 DEG C of baking ovens and done
Dry 6h, collect dried object；
（2）In mass ratio 5:6:1.3, dried object, calcium oxide, carbon black are well mixed, are put into grinding mill to enter with 300r/min
Row is milled, and is collected mill admixture, is put into calcining furnace, sets calcining heat as 1800 DEG C, calcines 3h, collects calcined material；
（3）Calcined material is put into ball mill, then 7 times of calcined material quality is added into ball mill, a diameter of 30mm steel ball, with
500r/min ball milling 40min, 300 mesh sieves are crossed, collect sieving particle, you can obtain major ingredient.
The tundish covering flux of the present invention includes the raw material of following parts by weight, 60 portions of major ingredients, 18 parts of antifungins, 4 parts of brightness
Long rock, 2 parts of fluorites and 1 part of calcium carbonate.
The preparation method of tundish covering flux：The composition weight of raw material is weighed into each raw material, is stirred mixing 10min
Afterwards, then through drying, you can obtain tundish covering flux.
Example 2
The preparation of major ingredient, comprises the following steps：
（1）Discarded carclazyte is taken to be filtered after carrying out wet concentration removal of impurities, the discarded carclazyte after collection filtering, in mass ratio 1:4, after filtering
Discarded carclazyte and 1.5mol/L hydrogen peroxide be put into mixer, at 80 DEG C with 150r/min stir 35min, filter while hot,
Filter residue is collected, the absolute ethyl alcohol washing filter residue of 5 times of filtrate volume is reused, the filter residue after washing is put into 100 DEG C of baking ovens and done
Dry 6h, collect dried object；
（2）In mass ratio 5:6:1.3, dried object, calcium oxide, carbon black are well mixed, are put into grinding mill to enter with 300r/min
Row is milled, and is collected mill admixture, is put into calcining furnace, sets calcining heat as 1800 DEG C, calcines 3h, collects calcined material；
（3）Calcined material is put into ball mill, then 7 times of calcined material quality is added into ball mill, a diameter of 30mm steel ball, with
500r/min ball milling 40min, 300 mesh sieves are crossed, collect sieving particle, you can obtain major ingredient.
The tundish covering flux of the present invention includes the raw material of following parts by weight, 70 portions of major ingredients, 20 parts of antifungins, 6 parts of brightness
Long rock, 5 parts of fluorites and 3 parts of calcium carbonate.
The preparation method of tundish covering flux：The composition weight of raw material is weighed into each raw material, is stirred mixing 10min
Afterwards, then through drying, you can obtain tundish covering flux.
Example 3
The preparation of major ingredient, comprises the following steps：
（1）Discarded carclazyte is taken to be filtered after carrying out wet concentration removal of impurities, the discarded carclazyte after collection filtering, in mass ratio 1:4, after filtering
Discarded carclazyte and 1.5mol/L hydrogen peroxide be put into mixer, at 80 DEG C with 150r/min stir 35min, filter while hot,
Filter residue is collected, the absolute ethyl alcohol washing filter residue of 5 times of filtrate volume is reused, the filter residue after washing is put into 100 DEG C of baking ovens and done
Dry 6h, collect dried object；
（2）In mass ratio 5:6:1.3, dried object, calcium oxide, carbon black are well mixed, are put into grinding mill to enter with 300r/min
Row is milled, and is collected mill admixture, is put into calcining furnace, sets calcining heat as 1800 DEG C, calcines 3h, collects calcined material；
（3）Calcined material is put into ball mill, then 7 times of calcined material quality is added into ball mill, a diameter of 30mm steel ball, with
500r/min ball milling 40min, 300 mesh sieves are crossed, collect sieving particle, you can obtain major ingredient.
The tundish covering flux of the present invention includes the raw material of following parts by weight, 65 portions of major ingredients, 19 parts of antifungins, 5 parts of brightness
Long rock, 3 parts of fluorites and 2 parts of calcium carbonate.
The preparation method of tundish covering flux：The composition weight of raw material is weighed into each raw material, is stirred mixing 10min
Afterwards, then through drying, you can obtain tundish covering flux.
Reference examples：The tundish covering flux of Co., Ltd of Dengfeng City production
Example and the tundish covering flux of reference examples are subjected to testing inspection：
Selection is carried out on the billet caster of certain factory, and casting steel grade selects SS400, big inclusion quantity 125t, middle inclusion quantity
39t, 1520~1540 DEG C of molten steel temperature in tundish, the stove of direct casting first is disposable, adds coverture 1250kg, later heat
According to concrete condition supplement coverture.
Heat-insulating property test is carried out to coverture：Per stove during casting, liquid steel temperature in tundish is measured, records the change of temperature
Change situation, temperature reduction is calculated, every kind of coverture obtains temperature drop value 4, and concrete numerical value is shown in Table 1.
Table 1
From table 1, tundish covering flux cooling rate prepared by the present invention is slow, has preferable heat-insulating property.
Example and reference examples tundish covering flux various performance parameters such as table 2.
Table 2
As shown in Table 2, the tundish covering flux modest viscosity that prepared by the present invention, has certain mobility, and fusion temperature is fitted
Preferably, fusing time is short, has preferable spreading property, avoids the occurrence of molten steel encrustation phenomena.
Claims (5)
1. a kind of tundish covering flux, it is characterised in that include the raw material of following parts by weight, 60~70 parts of major ingredients, 18~20
Part antifungin, 4~6 parts of gabbros, 2~5 parts of fluorites and 1~3 part of calcium carbonate.
2. tundish covering flux according to claim 1, it is characterised in that the preparation of the major ingredient, comprise the following steps：
（1）Discarded carclazyte and hydrogen peroxide are well mixed, stirred at 60~80 DEG C, then is filtered while hot, filter residue is collected, uses nothing
Water-ethanol washs filter residue, re-dry, collects dried object；
（2）Dried object, calcium oxide, carbon black are mixed, milled, mill admixture is collected, mill admixture is calcined,
Collect calcined material；
（3）Calcined material is subjected to ball milling, ball milling thing is collected, sieving, collects sieving particle, you can obtain major ingredient.
3. tundish covering flux according to claim 2, it is characterised in that the mass ratio of the discarded carclazyte and hydrogen peroxide
For 1:4.
4. tundish covering flux according to claim 2, it is characterised in that the dried object, calcium oxide, the quality of carbon black
Than for 5:4~6:1.1~1.3.
5. tundish covering flux according to claim 2, it is characterised in that the calcining heat is 1600~1800 DEG C,
Calcination time is 2~3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510109.3A CN107414045A (en) | 2017-06-28 | 2017-06-28 | A kind of tundish covering flux |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710510109.3A CN107414045A (en) | 2017-06-28 | 2017-06-28 | A kind of tundish covering flux |
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| CN107414045A true CN107414045A (en) | 2017-12-01 |
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| CN201710510109.3A Pending CN107414045A (en) | 2017-06-28 | 2017-06-28 | A kind of tundish covering flux |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0510842A2 (en) * | 1991-04-25 | 1992-10-28 | Foseco International Limited | Metallurgical fluxes |
| US5366535A (en) * | 1992-12-07 | 1994-11-22 | Premier Services Corporation | Basic tundish covering compound |
| CN1461680A (en) * | 2002-05-31 | 2003-12-17 | 宝山钢铁股份有限公司 | Tundish covering agent for pure steel, and its making method |
| CN1524645A (en) * | 2003-02-28 | 2004-09-01 | 上海汇集新材料股份有限公司 | Hollow tundish covering agent |
| CN102581240A (en) * | 2011-01-11 | 2012-07-18 | 宝山钢铁股份有限公司 | Tundish covering flux |
| CN102652989A (en) * | 2012-05-10 | 2012-09-05 | 江苏大学 | Tundish molten steel covering agent for high-cleanness steel pouring and preparation method and application of tundish molten steel covering agent |
| CN102744381A (en) * | 2012-07-25 | 2012-10-24 | 洛阳市科丰冶金新材料（集团）有限公司 | High-alkalinity tundish covering agent |
| CN103170592A (en) * | 2013-03-07 | 2013-06-26 | 西安建筑科技大学 | Tundish covering agent prepared by using blast furnace slag |
| CN105312522A (en) * | 2014-06-03 | 2016-02-10 | 本钢板材股份有限公司 | Novel tundish covering agent |
-
2017
- 2017-06-28 CN CN201710510109.3A patent/CN107414045A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0510842A2 (en) * | 1991-04-25 | 1992-10-28 | Foseco International Limited | Metallurgical fluxes |
| US5366535A (en) * | 1992-12-07 | 1994-11-22 | Premier Services Corporation | Basic tundish covering compound |
| CN1461680A (en) * | 2002-05-31 | 2003-12-17 | 宝山钢铁股份有限公司 | Tundish covering agent for pure steel, and its making method |
| CN1524645A (en) * | 2003-02-28 | 2004-09-01 | 上海汇集新材料股份有限公司 | Hollow tundish covering agent |
| CN102581240A (en) * | 2011-01-11 | 2012-07-18 | 宝山钢铁股份有限公司 | Tundish covering flux |
| CN102652989A (en) * | 2012-05-10 | 2012-09-05 | 江苏大学 | Tundish molten steel covering agent for high-cleanness steel pouring and preparation method and application of tundish molten steel covering agent |
| CN102744381A (en) * | 2012-07-25 | 2012-10-24 | 洛阳市科丰冶金新材料（集团）有限公司 | High-alkalinity tundish covering agent |
| CN103170592A (en) * | 2013-03-07 | 2013-06-26 | 西安建筑科技大学 | Tundish covering agent prepared by using blast furnace slag |
| CN105312522A (en) * | 2014-06-03 | 2016-02-10 | 本钢板材股份有限公司 | Novel tundish covering agent |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171201 |
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| RJ01 | Rejection of invention patent application after publication |