CN211284429U - Induction heating type molten steel slag washing and purifying device - Google Patents
Induction heating type molten steel slag washing and purifying device Download PDFInfo
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- CN211284429U CN211284429U CN201921393785.8U CN201921393785U CN211284429U CN 211284429 U CN211284429 U CN 211284429U CN 201921393785 U CN201921393785 U CN 201921393785U CN 211284429 U CN211284429 U CN 211284429U
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- molten steel
- slag
- induction heating
- flame retardant
- retardant coating
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 75
- 239000010959 steel Substances 0.000 title claims abstract description 75
- 239000002893 slag Substances 0.000 title claims abstract description 69
- 238000010438 heat treatment Methods 0.000 title claims abstract description 37
- 230000006698 induction Effects 0.000 title claims abstract description 23
- 238000005406 washing Methods 0.000 title claims description 17
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 14
- 239000010439 graphite Substances 0.000 claims abstract description 14
- 239000011449 brick Substances 0.000 claims abstract description 13
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000010079 rubber tapping Methods 0.000 claims abstract description 12
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 19
- 239000011248 coating agent Substances 0.000 abstract description 19
- 238000000576 coating method Methods 0.000 abstract description 19
- 239000003063 flame retardant Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 16
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000003749 cleanliness Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005266 casting Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000000746 purification Methods 0.000 description 7
- 238000007670 refining Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000003181 Panax pseudoginseng Nutrition 0.000 description 1
- 244000131316 Panax pseudoginseng Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000011403 purification operation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model relates to an induction heating formula molten steel slag washes purifier, including splendid attire container, induction heating coil, electromagnetic agitator, the splendid attire container includes shell, inside lining flame retardant coating, and splendid attire container bottom is equipped with bottom blowing air brick and tapping passageway, and the inboard of the inside lining flame retardant coating on splendid attire container upper portion is equipped with the ramming flame retardant coating, and the ramming flame retardant coating inboard is equipped with the graphite lining that thoughtlessly has magnesium oxide, and the inside induction heating coil that is equipped with of ramming flame retardant coating, the outside of splendid attire container is equipped with the electromagnetic agitator, and the magnetic pole of electromagnetic agitator is the helix and. The utility model provides the high cleanliness factor of molten steel creates good condition for the production of high cleanliness factor steel. The defects that the heating effect is limited by the conductivity of slag and the state of the slag, and the short circuit and the liquid level fluctuation are easily caused by electrode heating to cause adverse effects on the quality of a casting blank in the prior art are overcome.
Description
Technical Field
The utility model relates to the technical field of ferrous metallurgy, in particular to an induction heating type molten steel slag washing and purifying device.
Background
Because of the existence of non-metallic inclusions, the mechanical properties of the steel, such as strength, plasticity and the like, are seriously influenced, and the development of high-performance steel grades is limited. In order to remove non-metallic inclusions in molten steel to the maximum extent, in 1933 french engineers p.pemin proposed that slag materials with a certain amount of desulfurizing agent, deoxidizing agent and slag modifier are added along with steel flow while tapping, and steel slag is mixed and flushed, so that good dynamic conditions caused by the mixed flushing of the steel slag are obtained, the reaction area of the steel slag is fully enlarged, the desulfurization and sulfur reaction is promoted, and the effect of purifying the molten steel is achieved. The slag washing has obvious effect on removing inclusions in molten steel, and the technology is adopted by various steel mills until now. Because the slag charge is added in the tapping process, the steel slag interface contact is increased by the impact of steel flow, and the inclusion in the molten steel is absorbed into the slag, thereby completing the purification of the molten steel. The purification effect of the steel slag purification device is directly related to the contact surface and the contact time of the steel slag, and the slag state in the contact process is directly related, so that the larger the contact surface of the steel slag is, the longer the contact time is, and the more liquid the slag is in the contact process, the more beneficial to the purification of the molten steel is. In order to achieve such metallurgical effect, a 30% Al content was developed in the electroslag remelting process2O3And 70% CaF2"pseudo-ginseng residue", however, due to the large amount of CaF in the residue2The slag system can only be used in a copper crystallizer for electroslag remelting at the present stage. However, the electroslag remelting has low production efficiency and limited steel processing amount, and cannot meet the requirement of mass production, and the slag system needs to be used for purifying the steel water on a large scaleAn auxiliary device is disclosed.
The patent of application No. 2017113335774 discloses a device for cleaning and heating molten steel in a tundish and a use method thereof, which is mainly characterized in that a molten steel pool is arranged in the tundish, molten steel flowing out of a steel ladle firstly enters the molten steel pool, and the molten steel is contacted with the molten steel during the flowing-out process to realize the cleaning treatment of the molten steel. Although this method can achieve the effect of purifying the slag system of molten steel, it has certain disadvantages. Firstly, the density difference ratio of the molten steel and the liquid slag is large, the flowing molten steel can quickly pass through the liquid slag, the contact time of the molten steel and the liquid slag is short, and the slag washing effect is limited. Secondly, because the slag charge is more in the slag bath, in order to reach better slag washing purification effect, the slag charge of molten state has higher temperature, this patent has adopted two positive and negative heating electrodes to heat the slag charge in the slag bath, its principle is to realize the heating to the slag charge through positive and negative electrode and slag charge constitution return circuit, consequently the heating effect is limited by the electric conductivity of slag charge and the state of slag charge, if the slag charge electric conductivity is not good or there is partial solidification in the middle of the slag charge, then the heating effect will be influenced. In addition, as can be seen from the device, the molten steel flowing out of the ladle passes between the positive electrode and the negative electrode, and the molten steel flowing out is influenced by the stirrer arranged on the long nozzle, so that the two electrodes are easily short-circuited by the flowing-in molten steel, and further equipment is damaged. Finally, it is worth noting that slag system purification treatment of molten steel on a tundish easily causes fluctuation of the liquid level of the tundish, and further can affect the stability of the liquid level of the molten steel in a crystallizer connected with the tundish, thereby being unfavorable for the quality of continuous casting billets. In order to make up the deficiency of the prior art, the utility model provides an induction heating type molten steel slag washing and purifying device and a using method.
Disclosure of Invention
The utility model aims to solve the technical problem that an induction heating formula molten steel slag washing purifier is provided, the refining slag that is stronger with low melting point corrosivity is used for carrying out the slag washing to the molten steel, avoids having the electric conductive property that the heating effect is subject to the slag charge among the prior art and the state of slag charge, and electrode heating easily causes short circuit and the liquid level fluctuation to cause the not enough of harmful effects to the casting blank quality to improve the cleanliness factor of molten steel, create the good condition for the production of high cleanliness steel.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides an induction heating formula molten steel slag washes purifier, includes splendid attire container, induction heating coil, electromagnetic agitator, and the splendid attire container includes shell, inside lining flame retardant coating, and splendid attire container bottom is equipped with bottom blowing air brick and tapping passageway, and the inboard of the inside lining flame retardant coating on splendid attire container upper portion is equipped with the ramming flame retardant coating, and the ramming flame retardant coating inboard is equipped with the graphite lining that has thoughtlessly magnesium oxide, and the inside induction heating coil that is equipped with of ramming flame retardant coating, the outside of splendid attire container is equipped with the electromagnetic agitator, and the magnetic pole of electromagnetic agitator.
A sliding plate is arranged below the steel tapping channel.
The shell is provided with a plurality of vertical slideways for installing the electromagnetic stirrers.
The graphite lining mixed with the magnesium oxide is 30-100 mm thick and 1000-2000 mm high.
The graphite lining mixed with the magnesium oxide is built by adopting magnesia carbon bricks, and the components and the raw material granularity of the magnesia carbon bricks are as follows: the mass percentage of MgO is 10-30%, the mass percentage of C is 70-90%, and the particle size distribution of the raw material magnesite requires: 40-60% of 2-7 mm, 20-40% of 0.5-1.5 mm, 10-30% of <0.5mm and 0.2mm of graphite powder particle size.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides the high cleanliness factor of molten steel creates good condition for the production of high cleanliness factor steel. The defects that the heating effect is limited by the conductivity of slag and the state of the slag, and the short circuit and the liquid level fluctuation are easily caused by electrode heating to cause adverse effects on the quality of a casting blank in the prior art are overcome.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a development layout view of the magnetic poles of the electromagnetic stirrer of the present invention.
In the figure: the steel-making machine comprises an induction heating coil 1, liquid slag 2, a graphite lining layer 3 mixed with magnesium oxide, a ramming refractory layer 4, molten steel 5, a steel tapping channel 6, a sliding plate 7, an air brick 8, a shell 9, an electromagnetic stirrer 10, a lining refractory layer 11 and a slide way 12.
Detailed Description
The following further describes the embodiments of the present invention with reference to the attached drawings:
referring to fig. 1 to 3, an induction heating type molten steel slag washing and purifying apparatus includes a container, an induction heating coil 1, and an electromagnetic stirrer 10. The splendid attire container includes shell 9, inside lining flame retardant coating 11, and the inboard of the inside lining flame retardant coating 11 on splendid attire container upper portion is equipped with the ramming flame retardant coating 4, and 4 inboards of ramming flame retardant coating are equipped with the graphite lining 3 that thoughtlessly has magnesium oxide, and 4 insides of ramming flame retardant coating are equipped with induction heating coil 1.
The graphite lining layer 3 mixed with the magnesium oxide is used for improving the heating effect in the induction heating process, the thickness of the layer is 30-100 mm, and the height of the layer is 1000-2000 mm. The brick for building the graphite layer mixed with the magnesium oxide comprises the following components and raw material granularity, wherein the mass percentage of MgO is 10-30%, the mass percentage of C is 70-90%, the particle size distribution of the MgO-containing magnesia raw material is required to be 2-7 mm accounting for 40-60%, 0.5-1.5 mm accounting for 20-40%, 0.5mm accounting for 10-30%, and the particle size of graphite powder is less than 0.2 mm. When the refining slag is added into the container, part of the refining slag contacting with the molten steel is melted into liquid slag, and the rest exists in a solid form.
The outer part of the outer shell 9 of the container is provided with an electromagnetic stirrer 10, and the magnetic poles of the electromagnetic stirrer 10 are arranged in a spiral line. In order to improve the dynamic conditions of the interface reaction between the molten steel 5 and the liquid slag 2 in the vessel, an electromagnetic stirrer 10 is arranged at a position corresponding to the lower part of the graphite lining layer 3 mixed with the magnesium oxide, a plurality of vertical slideways 12 are arranged outside the shell, and the position of the whole electromagnetic stirrer can be adjusted. The adjusting range is +/-300 mm.
The technical parameters of the electromagnetic stirrer are as follows: the voltage is 450-600V, the current is 600-900A, the frequency is 3-10 Hz, the power is 300-500 kW, and the stirring mode is an interval and continuous spiral stirring mode.
In order to further improve the slag washing effect of the container, a bottom-blowing air brick 8 and a steel tapping channel 6 are arranged at the bottom of the container, wherein a sliding plate 7 capable of being opened and closed is arranged at the lower part of the steel tapping channel 6.
Examples
An induction heating type molten steel slag washing and purifying device comprises a container, an induction heating coil 1 and an electromagnetic stirrer 10. The splendid attire container includes shell 9, inside lining flame retardant coating 11, and the inboard of the inside lining flame retardant coating 11 on splendid attire container upper portion is equipped with the ramming flame retardant coating 4, and 4 inboards in the ramming flame retardant coating are equipped with the graphite lining 3 of thoughtlessly having magnesium oxide, and the thickness on this layer is 50mm, highly is 1500 mm. The magnesia carbon brick for building the graphite lining 3 mixed with the magnesia has the following components and raw material granularity requirements, wherein the mass percentage of MgO is 15 percent, the mass percentage of C is 85 percent, the particle size distribution of the magnesia raw material containing the MgO is 5mm to 50 percent, 1.1mm to 30 percent, 0.5mm to 20 percent, and the particle size of graphite powder is 0.1 mm.
An induction heating coil 1 is arranged in the ramming refractory layer 4.
The outer part of the outer shell 9 of the container is provided with an electromagnetic stirrer 10, and the magnetic poles of the electromagnetic stirrer 10 are arranged in a spiral line. The electromagnetic stirrer 10 is provided at a position corresponding to the lower portion of the graphite lining layer 3 mixed with magnesium oxide, and the outer portion of the housing is provided with a plurality of vertical slideways 12, so that the position of the whole electromagnetic stirrer can be adjusted. The adjusting range is +/-300 mm. The technical parameters of the electromagnetic stirrer are as follows: the voltage is 500V, the current is 700A, the frequency is 5Hz, the power is 400kW, and the stirring mode is an interval and continuous spiral stirring mode.
A bottom-blowing air brick 8 and a steel tapping channel 6 are arranged at the bottom of the container, wherein a sliding plate 7 capable of opening and closing is arranged at the lower part of the steel tapping channel 6.
The molten steel purification method adopting the induction heating type molten steel slag washing and purifying device specifically comprises the following steps:
step 1: the molten steel 5 to be treated is filled into a container, and the filling amount of the molten steel is controlled to be 150-300 mm away from the bottom edge of the graphite lining layer 3 mixed with the magnesium oxide on the molten steel surface;
step 2: adding refining slag into a container in two batches, wherein the first batch is 1/5-1/2 of the total amount, blowing argon into molten steel 5 through a bottom blowing air brick 8, controlling the flow of the argon to be 300-800 NL/min, melting the part of refining slag by using the heat of the molten steel, and adjusting the flow of the argon to be 30-80 NL/min after the refining slag is completely melted;
and step 3: adding all the second batch of slag into the container, starting the electromagnetic induction heating coil, heating and melting the added slag, and adjusting the argon flow to 500-1000 NL/min;
and 4, step 4: after the added refining slag is completely melted, starting an electromagnetic stirrer to carry out spiral stirring on a steel slag interface, controlling the voltage of the stirrer at the early stage of treatment to be 500-600V, controlling the current to be 800-900A, controlling the frequency to be 3-5 Hz, controlling the power to be 450-500 Kw, adopting an interval spiral electromagnetic stirring mode in a stirring mode, controlling the voltage of the stirrer at the later stage of treatment to be 450-500V, controlling the current to be 600-800A, controlling the frequency to be 5-10 Hz, controlling the power to be 300-400 Kw, and adopting a continuous spiral electromagnetic stirring mode in the stirring mode;
and 5: after the slag washing is finished, the electromagnetic stirrer is closed, and the argon flow of the air brick 5 is adjusted to 0 to E
And (8) finishing the slag washing purification operation of the molten steel at 60 NL/min.
The above is only the basic principle of the present invention, not to the present invention makes any limitation, all the bases of the present invention are the same changes and modifications to the above, all within the scope of the protection scheme of the present patent technology.
Claims (2)
1. An induction heating type molten steel slag washing and purifying device comprises a containing container, an induction heating coil and an electromagnetic stirrer, wherein the containing container comprises a shell and a lining refractory layer, a bottom blowing air brick and a steel tapping channel are arranged at the bottom of the containing container, a sliding plate is arranged below the steel tapping channel, a ramming refractory layer is arranged on the inner side of the lining refractory layer on the upper portion of the containing container, the electromagnetic stirrer is arranged outside the containing container, and magnetic poles of the electromagnetic stirrer are arranged in a spiral line; a plurality of vertical slideways for installing the electromagnetic stirrers are arranged on the shell; the position of the electromagnetic stirrer is adjusted integrally, and the adjusting range is +/-300 mm.
2. The induction heating type molten steel slag washing and purifying device as claimed in claim 1, wherein the graphite lining layer mixed with the magnesium oxide is constructed by magnesia carbon bricks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921393785.8U CN211284429U (en) | 2019-08-26 | 2019-08-26 | Induction heating type molten steel slag washing and purifying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921393785.8U CN211284429U (en) | 2019-08-26 | 2019-08-26 | Induction heating type molten steel slag washing and purifying device |
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| Publication Number | Publication Date |
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| CN211284429U true CN211284429U (en) | 2020-08-18 |
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| CN201921393785.8U Expired - Fee Related CN211284429U (en) | 2019-08-26 | 2019-08-26 | Induction heating type molten steel slag washing and purifying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110373516A (en) * | 2019-08-26 | 2019-10-25 | 辽宁科技大学 | A kind of induction heating type molten steel wash heat purification device and purification method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110373516A (en) * | 2019-08-26 | 2019-10-25 | 辽宁科技大学 | A kind of induction heating type molten steel wash heat purification device and purification method |
| CN110373516B (en) * | 2019-08-26 | 2024-03-26 | 辽宁科技大学 | Induction heating type molten steel slag washing purification device and purification method |
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