CN106007752B - A kind of special steel smelting air brick of steel ladle and its preparation method and application - Google Patents
A kind of special steel smelting air brick of steel ladle and its preparation method and application Download PDFInfo
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- CN106007752B CN106007752B CN201610339312.4A CN201610339312A CN106007752B CN 106007752 B CN106007752 B CN 106007752B CN 201610339312 A CN201610339312 A CN 201610339312A CN 106007752 B CN106007752 B CN 106007752B
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Abstract
The invention discloses a kind of special steel smelting air brick of steel ladle and its preparation method and application, which is made of the raw material below according to parts by weight：48 56 parts of black corundum, 5 12 parts of nickel nitrate, 4 32 parts of montmorillonite 2,10 18 parts of phenolic resin, 40 48 parts of positive silicic acid propyl ester.By montmorillonite powder and black corundum powder mixed grinding, positive silicic acid propyl ester heating stirring is then added, nitric acid nickel by powder and deionized water heating stirring is then added, is ultrasonically treated, drying pretreatment material；Pretreatment material is uniformly mixed with Phenolic resin powder, adds deionized water moulding by casting, curing in the mold, demoulding high-temperature process to obtain the final product.Air brick of steel ladle produced by the present invention has the characteristics that intensity height, good permeability, thermal shock resistance are strong, resistance to erosion, anti-slag infiltration is good and corrosion resistance is excellent.
Description
Technical field
The present invention relates to air brick of steel ladle technical field, specifically a kind of special steel smelting air brick of steel ladle and its preparation
Methods and applications.
Background technology
With the development of special steel metallurgical technology and furnace outer refining process, hydrogen is blown into molten steel by air brick of steel ladle
Equal inert gases, are sufficiently stirred molten steel, can rapidly and uniformly melt a variety of materials of the addition in molten steel, have to reach removal
Evil impurity and the purpose for improving Cleanliness of Molten Steel.With the gradual enlargement of ladle and raising and the duration of heat of smelting temperature
Extension, the use environment of refractory material is more and more severe, and to Refractory for Ladle, more stringent requirements are proposed for this.Due to saturating
Position and environment of the gas brick in ladle are more special, more demanding to its service life, air blowing success rate, Air permenbility, at present ladle
Bottom-blown air brick oneself become limitation ladle life improve bottleneck factor.The basic matterial (Mg0) used in the air brick of early stage
There are problems that spalling difference and poor thermal shock resistance, therefore this product is rarely employed at present.In contrast, corundum material has
There are good high-temperature behavior, thermal shock resistance and bigger to molten steel angle of wetting, has become instead of magnesian
Main material.But since pure corundum air brick erosion-resisting characteristics in use is poor, peel off chip off-falling it is serious, in sintering process and
A12O3It reacts and generates spinelle, the coefficient of expansion of material is caused to increase and dense structure, though make the resistant to corrosion of air brick
Property and inoxidizability improve, but its gas permeability is severely impacted.
Invention content
The purpose of the present invention is to provide a kind of intensity height, good permeability, thermal shock resistance are strong, resistance to erosion, anti-slag
The special steel smelting air brick of steel ladle and its preparation method and application that infiltration is good and corrosion resistance is excellent, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of special steel smelting air brick of steel ladle, is made of the raw material below according to parts by weight：48-56 parts of black corundum,
5-12 parts of nickel nitrate, 4-32 parts of montmorillonite 2,10-18 parts of phenolic resin, 40-48 parts of positive silicic acid propyl ester.
As a further solution of the present invention：The special steel smelting air brick of steel ladle, by below according to parts by weight
Raw material forms：50-54 parts of black corundum, 7-10 parts of nickel nitrate, 6-30 parts of montmorillonite 2,12-16 parts of phenolic resin, positive silicic acid propyl ester
42-46 parts.
As a further solution of the present invention：The special steel smelting air brick of steel ladle, by below according to parts by weight
Raw material forms：52 parts of black corundum, 9 parts of nickel nitrate, 8 parts of montmorillonite 2, phenolic resin 14,44 parts of positive silicic acid propyl ester.
The preparation method of the special steel smelting air brick of steel ladle, comprises the steps of：
1）Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nitre is made
Sour nickel by powder, montmorillonite powder, Phenolic resin powder；
2）Montmorillonite powder is mixed with black corundum powder and ground 30-40min, positive silicic acid propyl ester is then added, in 50-
Heating stirring handles 20-30min at 60 DEG C, and the deionized water of 8-12 times of nitric acid nickel by powder and montmorillonite quality is then added,
At 50-60 DEG C after heating stirring 20-30min, and supersound process 50-60min is carried out at such a temperature, ultrasonic power is
Drying pretreatment material at 800W, 100-105 DEG C；
3）Pretreatment material is uniformly mixed with Phenolic resin powder, the deionized water of raw material gross mass 3-4% is added, stirs
Green compact are made in moulding by casting after mixing uniformly；It is demoulded after curing in the mold 10h at 55-60 DEG C；Green body after demoulding is in atmosphere of hydrogen
Under 110-120 DEG C is warming up within the time of 15-20min, and keep the temperature 10-20min at such a temperature；Again 50-60min when
It is interior to be warming up to 400-450 DEG C, and 1-1.5h is kept the temperature at such a temperature；Then it changes hydrogen into argon gas, is risen in 30-40min
Temperature keeps the temperature 20-30min at such a temperature to 750-800 DEG C；It is warming up to 1100-1200 DEG C in the time of 30-40min again,
And 4-5h is kept the temperature at such a temperature to get air brick of steel ladle.
Application of the air brick in special steel smelting ladle.
Compared with prior art, the beneficial effects of the invention are as follows：
Montmorillonite is pre-processed with black corundum by positive silicic acid propyl ester in the present invention ,-Si- is made to enter montmorillonite and black corundum
In, in black corundum Al2O3 formed stable structure chemical bond, nickel ion under ultrasound condition enter layering montmorillonite with
In black corundum, be reduced to Ni after high-temperature calcination, and with Al, O, Si, the chemical bond for forming stable structure, to make its intensity
The feature that height, good permeability, thermal shock resistance are strong, resistance to erosion, anti-slag infiltration is good and corrosion resistance is excellent.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of special steel smelting air brick of steel ladle is made of the raw material below according to parts by weight：
48 parts of black corundum, 5 parts of nickel nitrate, 4 parts of montmorillonite 2,10 parts of phenolic resin, 40 parts of positive silicic acid propyl ester.
Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nitric acid is made
Nickel by powder, montmorillonite powder, Phenolic resin powder.Montmorillonite powder is mixed with black corundum powder and ground 30min, is then added
Enter positive silicic acid propyl ester, heating stirring handles 20min at 50 DEG C, and 8 times of nitric acid nickel by powder and montmorillonite quality is then added
Deionized water at 50 DEG C after heating stirring 20min, and carries out supersound process 50min at such a temperature, and ultrasonic power is
800W, drying pretreatment material at 100 DEG C.Pretreatment material is uniformly mixed with Phenolic resin powder, adds the total matter of raw material
The deionized water of amount 3%, stirs evenly rear moulding by casting, and green compact are made；It is demoulded after curing in the mold 10h at 55 DEG C；After demoulding
Green body is warming up to 110 DEG C within the time of 15min under an atmosphere of hydrogen, and keeps the temperature 10min at such a temperature；Again 50min's
It is warming up to 400 DEG C in time, and keeps the temperature 1h at such a temperature；Then it changes hydrogen into argon gas, 750 DEG C is warming up in 30min,
And 20min is kept the temperature at such a temperature；1100 DEG C are warming up in the time of 30min again, and keeps the temperature 4h at such a temperature to get steel
Packet air brick.
Special steel smelting obtained by the embodiment of the present invention with air brick of steel ladle after testing：Compressive resistance is 150-
160MPa；Flexural strength is 27-32MPa；1100 DEG C of water cooling thermal shocks>45 times；Service life>31 times.
Embodiment 2
In the embodiment of the present invention, a kind of special steel smelting air brick of steel ladle is made of the raw material below according to parts by weight：
56 parts of black corundum, 12 parts of nickel nitrate, 32 parts of montmorillonite, 18 parts of phenolic resin, 48 parts of positive silicic acid propyl ester.
Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nitric acid is made
Nickel by powder, montmorillonite powder, Phenolic resin powder.Montmorillonite powder is mixed with black corundum powder and ground 40min, is then added
Enter positive silicic acid propyl ester, heating stirring handles 30min at 60 DEG C, and 12 times of nitric acid nickel by powder and montmorillonite quality is then added
Deionized water at 60 DEG C after heating stirring 30min, and carries out supersound process 60min at such a temperature, and ultrasonic power is
800W, drying pretreatment material at 105 DEG C.Pretreatment material is uniformly mixed with Phenolic resin powder, adds the total matter of raw material
The deionized water of amount 4%, stirs evenly rear moulding by casting, and green compact are made；It is demoulded after curing in the mold 10h at 60 DEG C；After demoulding
Green body is warming up to 120 DEG C within the time of 20min under an atmosphere of hydrogen, and keeps the temperature 20min at such a temperature；Again 60min's
It is warming up to 450 DEG C in time, and keeps the temperature 1.5h at such a temperature；Then it changes hydrogen into argon gas, 800 is warming up in 40min
DEG C, and 30min is kept the temperature at such a temperature；1200 DEG C are warming up in the time of 40min again, and keeps the temperature 5h at such a temperature, i.e.,
Obtain air brick of steel ladle.
Special steel smelting obtained by the embodiment of the present invention with air brick of steel ladle after testing：Compressive resistance is 155-
163MPa；Flexural strength is 28-33MPa；1100 DEG C of water cooling thermal shocks>47 times；Service life>32 times.
Embodiment 3
In the embodiment of the present invention, a kind of special steel smelting air brick of steel ladle is made of the raw material below according to parts by weight：
50 parts of black corundum, 7 parts of nickel nitrate, 6 parts of montmorillonite 2,12 parts of phenolic resin, 42 parts of positive silicic acid propyl ester.
Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nitric acid is made
Nickel by powder, montmorillonite powder, Phenolic resin powder.Montmorillonite powder is mixed with black corundum powder and ground 35min, is then added
Enter positive silicic acid propyl ester, heating stirring handles 25min at 55 DEG C, and 10 times of nitric acid nickel by powder and montmorillonite quality is then added
Deionized water at 55 DEG C after heating stirring 25min, and carries out supersound process 55min at such a temperature, and ultrasonic power is
800W, drying pretreatment material at 105 DEG C.Pretreatment material is uniformly mixed with Phenolic resin powder, adds the total matter of raw material
The deionized water of amount 3.5%, stirs evenly rear moulding by casting, and green compact are made；It is demoulded after curing in the mold 10h at 58 DEG C；After demoulding
Green body 115 DEG C are warming up within the time of 20min under an atmosphere of hydrogen, and keep the temperature 15min at such a temperature；Again in 55min
Time in be warming up to 425 DEG C, and keep the temperature 1.2h at such a temperature；Then it changes hydrogen into argon gas, is warming up in 35min
775 DEG C, and 25min is kept the temperature at such a temperature；1150 DEG C are warming up in the time of 35min again, and is kept the temperature at such a temperature
4.5h is to get air brick of steel ladle.
Special steel smelting obtained by the embodiment of the present invention with air brick of steel ladle after testing：Compressive resistance is 160-
170MPa；Flexural strength is 29-34MPa；1100 DEG C of water cooling thermal shocks>49 times；Service life>33 times.
Embodiment 4
In the embodiment of the present invention, a kind of special steel smelting air brick of steel ladle is made of the raw material below according to parts by weight：
54 parts of black corundum, 10 parts of nickel nitrate, 30 parts of montmorillonite, 16 parts of phenolic resin, 46 parts of positive silicic acid propyl ester.
Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nitric acid is made
Nickel by powder, montmorillonite powder, Phenolic resin powder.Montmorillonite powder is mixed with black corundum powder and ground 35min, is then added
Enter positive silicic acid propyl ester, heating stirring handles 25min at 55 DEG C, and 10 times of nitric acid nickel by powder and montmorillonite quality is then added
Deionized water at 55 DEG C after heating stirring 25min, and carries out supersound process 55min at such a temperature, and ultrasonic power is
800W, drying pretreatment material at 105 DEG C.Pretreatment material is uniformly mixed with Phenolic resin powder, adds the total matter of raw material
The deionized water of amount 3.5%, stirs evenly rear moulding by casting, and green compact are made；It is demoulded after curing in the mold 10h at 58 DEG C；After demoulding
Green body 115 DEG C are warming up within the time of 20min under an atmosphere of hydrogen, and keep the temperature 15min at such a temperature；Again in 55min
Time in be warming up to 425 DEG C, and keep the temperature 1.2h at such a temperature；Then it changes hydrogen into argon gas, is warming up in 35min
775 DEG C, and 25min is kept the temperature at such a temperature；1150 DEG C are warming up in the time of 35min again, and is kept the temperature at such a temperature
4.5h is to get air brick of steel ladle.
Special steel smelting obtained by the embodiment of the present invention with air brick of steel ladle after testing：Compressive resistance is 162-
171MPa；Flexural strength is 30-35MPa；1100 DEG C of water cooling thermal shocks>50 times；Service life>34 times.
Embodiment 5
In the embodiment of the present invention, a kind of special steel smelting air brick of steel ladle is made of the raw material below according to parts by weight：
52 parts of black corundum, 9 parts of nickel nitrate, 8 parts of montmorillonite 2, phenolic resin 14,44 parts of positive silicic acid propyl ester.
Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nitric acid is made
Nickel by powder, montmorillonite powder, Phenolic resin powder.Montmorillonite powder is mixed with black corundum powder and ground 35min, is then added
Enter positive silicic acid propyl ester, heating stirring handles 25min at 55 DEG C, and 10 times of nitric acid nickel by powder and montmorillonite quality is then added
Deionized water at 55 DEG C after heating stirring 25min, and carries out supersound process 55min at such a temperature, and ultrasonic power is
800W, drying pretreatment material at 105 DEG C.Pretreatment material is uniformly mixed with Phenolic resin powder, adds the total matter of raw material
The deionized water of amount 3.5%, stirs evenly rear moulding by casting, and green compact are made；It is demoulded after curing in the mold 10h at 58 DEG C；After demoulding
Green body 115 DEG C are warming up within the time of 20min under an atmosphere of hydrogen, and keep the temperature 15min at such a temperature；Again in 55min
Time in be warming up to 425 DEG C, and keep the temperature 1.2h at such a temperature；Then it changes hydrogen into argon gas, is warming up in 35min
775 DEG C, and 25min is kept the temperature at such a temperature；1150 DEG C are warming up in the time of 35min again, and is kept the temperature at such a temperature
4.5h is to get air brick of steel ladle.
Special steel smelting obtained by the embodiment of the present invention with air brick of steel ladle after testing：Compressive resistance is 163-
174MPa；Flexural strength is 32-35MPa；1100 DEG C of water cooling thermal shocks>53 times；Service life>38 times.
Comparative example 1
In addition to without containing positive silicic acid propyl ester, formula and preparation process are consistent with embodiment 5.
Special steel smelting obtained by this comparative example with air brick of steel ladle after testing：Compressive resistance is 90-95MPa；Anti- folding
Intensity is 15-18MPa；1100 DEG C of water cooling thermal shocks>28 times；Service life>20 times.
Comparative example 2
Only contain black corundum, positive silicic acid propyl ester, formula and preparation process are consistent with embodiment 5.
Special steel smelting obtained by this comparative example with air brick of steel ladle after testing：Compressive resistance is 60-63MPa；Anti- folding
Intensity is 10-12MPa；1100 DEG C of water cooling thermal shocks>19 times；Service life>16 times.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (4)
1. a kind of preparation method of special steel smelting air brick of steel ladle, which is characterized in that the air brick of steel ladle is by following
It is formed according to the raw material of parts by weight：48-56 parts of black corundum, 5-12 parts of nickel nitrate, 4-32 parts of montmorillonite 2, phenolic resin 10-18
Part, 40-48 parts of positive silicic acid propyl ester；
1）Black corundum, nickel nitrate, montmorillonite, phenolic resin are crushed respectively, cross 200 mesh sieve, black corundum powder, nickel nitrate is made
Powder, montmorillonite powder, Phenolic resin powder；
2）Montmorillonite powder is mixed with black corundum powder and ground 30-40min, positive silicic acid propyl ester is then added, at 50-60 DEG C
Lower heating stirring handles 20-30min, the deionized water of 8-12 times of nitric acid nickel by powder and montmorillonite quality is then added, in 50-
At 60 DEG C after heating stirring 20-30min, and supersound process 50-60min is carried out at such a temperature, ultrasonic power 800W, 100-
Drying pretreatment material at 105 DEG C；
3）Pretreatment material is uniformly mixed with Phenolic resin powder, adds the deionized water of raw material gross mass 3-4%, stirring is equal
Green compact are made in moulding by casting after even；It is demoulded after curing in the mold 10h at 55-60 DEG C；Green body after demoulding exists under an atmosphere of hydrogen
It is warming up to 110-120 DEG C in the time of 15-20min, and keeps the temperature 10-20min at such a temperature；Again within the time of 50-60min
It is warming up to 400-450 DEG C, and keeps the temperature 1-1.5h at such a temperature；Then it changes hydrogen into argon gas, is warming up in 30-40min
750-800 DEG C, and 20-30min is kept the temperature at such a temperature；It is warming up to 1100-1200 DEG C in the time of 30-40min again, and
Heat preservation 4-5h is to get air brick of steel ladle at this temperature.
2. the preparation method of special steel smelting air brick of steel ladle according to claim 1, which is characterized in that by pressing below
According to the raw material composition of parts by weight：50-54 parts of black corundum, 7-10 parts of nickel nitrate, 6-30 parts of montmorillonite 2,12-16 parts of phenolic resin,
42-46 parts of positive silicic acid propyl ester.
3. the preparation method of special steel smelting air brick of steel ladle according to claim 2, which is characterized in that by pressing below
According to the raw material composition of parts by weight：52 parts of black corundum, 9 parts of nickel nitrate, 8 parts of montmorillonite 2, phenolic resin 14,44 parts of positive silicic acid propyl ester.
4. application of the air brick in special steel smelting ladle as made from claim 1-3 any the methods.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339312.4A CN106007752B (en) | 2016-05-23 | 2016-05-23 | A kind of special steel smelting air brick of steel ladle and its preparation method and application |
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| CN201610339312.4A CN106007752B (en) | 2016-05-23 | 2016-05-23 | A kind of special steel smelting air brick of steel ladle and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979992A (en) * | 2014-06-09 | 2014-08-13 | 武汉科技大学 | Ladle porous brick and preparation method thereof |
| CN104003740A (en) * | 2014-06-03 | 2014-08-27 | 武汉科技大学 | Gas-permeable brick of steel ladle for special steel smelting and preparation method of brick |
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| CN104003740A (en) * | 2014-06-03 | 2014-08-27 | 武汉科技大学 | Gas-permeable brick of steel ladle for special steel smelting and preparation method of brick |
| CN103979992A (en) * | 2014-06-09 | 2014-08-13 | 武汉科技大学 | Ladle porous brick and preparation method thereof |
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