CN217324159U - By using CO 2 Device for blowing ladle top slag modifier - Google Patents
By using CO 2 Device for blowing ladle top slag modifier Download PDFInfo
- Publication number
- CN217324159U CN217324159U CN202220824756.8U CN202220824756U CN217324159U CN 217324159 U CN217324159 U CN 217324159U CN 202220824756 U CN202220824756 U CN 202220824756U CN 217324159 U CN217324159 U CN 217324159U
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- Prior art keywords
- spray gun
- blowing
- ladle
- slag
- powder
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- 238000007664 blowing Methods 0.000 title claims abstract description 55
- 239000003607 modifier Substances 0.000 title claims abstract description 27
- 239000002893 slag Substances 0.000 title abstract description 51
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 239000007921 spray Substances 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 239000011819 refractory material Substances 0.000 claims abstract description 13
- 239000012159 carrier gas Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000003860 storage Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 5
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 abstract description 15
- 239000006028 limestone Substances 0.000 abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The utility model discloses an utilize CO 2 The device for blowing the slag modifier on the top of the steel ladle comprises a top-blowing spray gun arranged on the top of the steel ladle, wherein CO is introduced into the inner cavity of the top-blowing spray gun 2 As carrier gas and stirring gas, a refractory material layer is arranged at one end of a top-blowing spray gun inserted into a steel ladle, the top-blowing spray gun is controlled to lift through a lifting control system, the top of the top-blowing spray gun is connected with a discharge valve at the bottom of a powder spraying tank through a discharge pipe, the top of the powder spraying tank is connected with a powder storage bin through a feed pipe, and the discharge pipe and the feed pipe adopt metal hoses. The modifier is limestone powder or limestone powder and aluminum ashPowder mixed according to a certain proportion. The top-blowing spray gun of the utility model uses CO 2 Blowing with CO as carrier gas 2 The rotary stirring of the top-blowing spray gun is replaced by the bubble stirring, so that the problems of molten steel splashing and steel sticking and sticking of slag at the ladle opening are avoided, the service life of the spray gun is prolonged, and the structure is simple and the cost is low.
Description
Technical Field
The utility model relates to the field of iron and steel smelting equipment, in particular to a method for utilizing CO 2 A device for blowing the ladle top slag modifier.
Background
Although slag blocking measures are taken when molten steel is tapped from a converter, converter slag has high oxidizability and is very difficult to completely block final slag, and in order to solve the problem, at present, the slag blocking rate is continuously improved, and most of the converter slag adopts a ladle top slag modifier, so that the oxidizability of the ladle top slag is reduced, the pollution to the molten steel is reduced, and the purpose of absorbing floating impurities is achieved. Currently, there are two general ways to modify ladle top slag: (1) slag dilution method: adding pre-melted synthetic slag in the tapping process, and completing metallurgical reaction of slag modification and molten steel desulphurization through molten steel mixing and flushing, wherein the modifier comprises materials such as lime, fluorite or bauxite; (2) slag reduction treatment: i.e. after tapping, adding CaO + aluminum powder or A1+ A1 2 0 3 +SiO 2 And the like. The existing ladle top slag modifier is mainly massive or bagged crushed aggregates, is added into a ladle through an alloy chute during steel tapping or is manually put into the ladle after the steel tapping is finished, but the ladle top slag modifier is added in such a way to carry out secondary melting, thus causing energy waste; after the modifier is added, the modifier is accumulated on the surface of the top slag of the steel ladle, and because the surface temperature of molten steel is low, the top slag of the steel ladle is easy to form and crust, thereby increasing the consumption of deoxidizer, influencing the cleanliness of the molten steel, the bottom blowing effect of the steel ladle and automatic casting, and the excessive top slag of the steel ladle can also obstruct electrodes of an LF furnace and an RH vacuum grooveEntering into a ladle to influence normal refining of molten steel; the modifier is usually prepared by using premelted slag, and has high production cost, high energy consumption and environmental pollution.
Chinese patent No. 201720431244.4 discloses a rotary powder spraying device for metallurgy, which modifies the top slag of a steel ladle by rotary powder spraying and using inert gas as carrier gas, so that an isolation zone is formed between the top slag of the steel ladle and molten steel, the influence of the top slag of the steel ladle on the molten steel is eliminated, and the effect of avoiding secondary oxidation of the molten steel by the top slag of the steel ladle is achieved. However, the device has a complex structure, and the following problems can occur in practical operation: (1) the powder gun is inserted into molten steel and is difficult to rotate and drive under the resistance action of the molten steel; (2) the spray gun rotates to cause serious splashing of molten steel; (3) the nozzle head and the ladle mouth of the inverted T-shaped spray gun are seriously stuck with slag and steel, so that the service life of the spray gun is short.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for utilizing CO 2 A device for blowing a ladle top slag modifier aims at solving the problems that a spray gun is difficult to drive and a spray head is seriously stuck with slag due to the rotary addition of the modifier and eliminating the influence of the ladle top slag on molten steel.
The utility model relates to an utilize CO 2 The device for blowing the slag modifier on the top of the steel ladle comprises a top-blowing spray gun arranged on the top of the steel ladle, wherein CO is introduced into the inner cavity of the top-blowing spray gun 2 As carrier gas and stirring gas, a refractory material layer is arranged at one end of a blowing head of a top-blowing spray gun inserted into a steel ladle, the top-blowing spray gun is controlled to ascend and descend by a lifting control system, the top of the top-blowing spray gun is connected with a discharge valve at the bottom of a powder spraying tank through a discharge pipe, and the top of the powder spraying tank is connected with a powder bin through a feed pipe.
Preferably, the material of the blowing head is single-tube ceramic internally plated with silicon carbide.
Preferably, the height of the refractory material layer is 1/2 of the total length of the top-blowing lance, and the refractory material layer is knotted by adopting a magnesium-carbon refractory material, and the refractoriness is more than or equal to 1650 ℃.
Preferably, the discharge pipe and the feed pipe are metal hoses.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the device adds the ladle top slag modifier in a blowing mode, avoids the condition that the modifier is accumulated on the surface of the ladle top slag after being added and is influenced by the low temperature of the surface of molten steel to form ladle top slag crusting, reduces the consumption of the deoxidizer, ensures the normal refining of the molten steel, and has higher molten steel cleanliness.
2. The device is arranged at the top of the steel ladle and uses CO through a top-blown spray gun 2 The gas is used as carrier gas, limestone powder or limestone powder and aluminium ash are simply and mechanically mixed according to a certain proportion, and then sprayed under the slag layer on the top of steel ladle metal melting tank, and the limestone is used to quickly decompose fine-particle primary lime with high activity at high temperature, and then the primary lime is dispersed in the top slag and immediately mixed with (FeO) and (Fe) in the top slag 2 O 3 ) A chemical reaction occurs to form a low melting point compound melt which is melted into the slag, and CaCO in the limestone 3 CO is also produced by decomposition 2 With carrier gas CO 2 The carbon dioxide is used as stirring gas to play a foaming role together to replace the rotary stirring function of a top-blowing powder gun, can strengthen and improve the dynamic condition of steel slag interface reaction, and quickly forms low-melting-point and good-fluidity ladle top slag and CO 2 As the carrier gas, the dust can be reduced, secondary and tertiary dust removal can be carried out by using the original equipment of a factory building, and the equipment investment is simplified.
3. The raw materials of the ladle top slag modifier adopted by the device are limestone powder and aluminum ash which are both industrial solid wastes, the cost is low, and the powder formed by mixing the limestone powder and the aluminum ash according to a certain proportion does not contain any additive and bonding agent, so that the molten steel cannot be polluted.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of the top-blowing lance of the present invention.
In the figure: 1-steel ladle; 2-a top-blown spray gun; 3-a lift control system; 4-a discharge pipe; 5-powder spraying tank; 6-feeding pipe; 7-powder material bin; 21-a blowing head; 22-layer of refractory material.
Detailed Description
The invention will be further explained with reference to the drawings and the detailed description below:
as shown in fig. 1-2, the utility model relates to a device for utilizing CO 2 The device for blowing the slag modifier on the top of the steel ladle comprises a top-blowing spray gun 2 arranged on the top of the steel ladle 1, wherein CO is introduced into the inner cavity of the top-blowing spray gun 2 2 As carrier gas and stirring gas, a refractory material layer 22 is arranged at one end of a blowing head 21 of the top-blowing spray gun 2, which is inserted into the ladle 1, the material of the blowing head 21 is single-tube ceramic with silicon carbide plated inside, the height of the refractory material layer 22 is 1/2 of the total length of the top-blowing spray gun 2, a magnesium-carbon refractory material is adopted for knotting, and the refractoriness is more than or equal to 1650 ℃. The top-blowing spray gun 2 is controlled to ascend and descend by a lifting control system 3, the top of the top-blowing spray gun 2 is connected with a discharge valve at the bottom of a powder spraying tank 5 by a discharge pipe 4 (the lifting control system and the powder spraying tank are both in the prior art and are not shown in detail in the figure), the top of the powder spraying tank 5 is connected with a powder storage bin 7 by a feed pipe 6, and the discharge pipe 4 and the feed pipe 6 are metal hoses. The modifier is limestone powder or powder formed by mixing limestone powder and aluminum ash according to a certain proportion.
The device for blowing the ladle top slag modifier comprises the following steps:
the first step is as follows: and after tapping of the converter, transporting the ladle 1 to the position below the top-blown spray gun 2.
The second step is that: and driving a lifting control system 3 at the upper part of the top-blowing spray gun 2, descending the top-blowing spray gun 2 and inserting the top-blowing spray gun 2 into a position 5-50 mm below the liquid level of the top slag in the ladle 1, opening carrier gas while descending the top-blowing spray gun 2 to prevent the top-blowing spray gun 2 from being blocked, and starting to spray powder to modify the ladle top slag after the top-blowing spray gun 2 is inserted into the liquid level of the top slag for 10 seconds. The powder injection time and the powder amount can be flexibly adjusted according to the control of refined steel grade and the slag discharge amount of converter tapping. The blowing powder is limestone powder generally, the steel grade with high requirement on molten steel cleanliness is powder mixed by limestone powder and aluminum ash according to a certain proportion, and the limestone powder and the aluminum ash are both industrial solid wastes and are low in price, so that the method has a very obvious cost advantage. The limestone powder and aluminum ash mixed according to a certain proportion do not contain any additive and bonding agent, and can not cause any additional pollution to molten steel.
The third step: after the top slag modification is finished, closing a discharge valve of the powder spraying tank 5, stopping powder spraying, and continuously spraying CO 2 Gas 15-45 s, strengthenStirring, when improving modification ladle top sediment, played the blowback effect, the effectual 2 gun holes of top-blown spray gun of preventing block up, the life-span of extension top-blown spray gun 2. Using CO 2 As carrier gas and limestone powder as modifier to generate great amount of CO 2 The bubbles play a role in stirring, and the series problems of molten steel splashing, steel sticking and slag sticking of the top-blowing spray gun and the like caused by the rotary stirring of the top-blowing spray gun are avoided.
The fourth step: and when the modifier is sprayed to modify the top slag, a bottom argon blowing system of the ladle 1 is opened, bottom blowing and top blowing powder spraying are synchronously performed, the treatment time of an argon station is saved, the treatment period is shortened, the temperature drop is reduced, the stirring effect is enhanced, and the floating of inclusions is promoted.
Claims (4)
1. By using CO 2 Device of jetting ladle top sediment modifier, its characterized in that: comprises a top-blown spray gun (2) arranged at the top of a steel ladle (1), wherein CO is introduced into the inner cavity of the top-blown spray gun (2) 2 As carrier gas and stirring gas, one end of a blowing head (21) of the top-blowing spray gun (2) inserted into the steel ladle (1) is provided with a refractory material layer (22), the top-blowing spray gun (2) is controlled to lift through a lifting control system (3), the top of the top-blowing spray gun (2) is connected with a discharge valve at the bottom of the powder spraying tank (5) through a discharge pipe (4), and the top of the powder spraying tank (5) is connected with a powder storage bin (7) through a feed pipe (6).
2. The method of claim 1 using CO 2 Device of jetting ladle top sediment modifier, its characterized in that: the material of the blowing head (21) is single-tube ceramic internally plated with silicon carbide.
3. The method of claim 1 using CO 2 Device of jetting ladle top sediment modifier, its characterized in that: the height of the refractory material layer (22) is 1/2 of the total length of the top-blowing spray gun (2), and the refractory material layer is knotted by adopting a magnesium-carbon refractory material, and the refractoriness is more than or equal to 1650 ℃.
4. As defined in any one of claims 1 to 3One aspect of the utilization of CO 2 Device of jetting ladle top sediment modifier, its characterized in that: the discharge pipe (4) and the feed pipe (6) adopt metal hoses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220824756.8U CN217324159U (en) | 2022-04-11 | 2022-04-11 | By using CO 2 Device for blowing ladle top slag modifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220824756.8U CN217324159U (en) | 2022-04-11 | 2022-04-11 | By using CO 2 Device for blowing ladle top slag modifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217324159U true CN217324159U (en) | 2022-08-30 |
Family
ID=82947036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220824756.8U Expired - Fee Related CN217324159U (en) | 2022-04-11 | 2022-04-11 | By using CO 2 Device for blowing ladle top slag modifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217324159U (en) |
-
2022
- 2022-04-11 CN CN202220824756.8U patent/CN217324159U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220830 |