CN108145144B - Ladle working lining for controlling molten steel slag winding - Google Patents
Ladle working lining for controlling molten steel slag winding Download PDFInfo
- Publication number
- CN108145144B CN108145144B CN201711450678.XA CN201711450678A CN108145144B CN 108145144 B CN108145144 B CN 108145144B CN 201711450678 A CN201711450678 A CN 201711450678A CN 108145144 B CN108145144 B CN 108145144B
- Authority
- CN
- China
- Prior art keywords
- wall
- brick
- fuel cell
- solid oxide
- oxide fuel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a ladle working lining for controlling molten steel slag. The technical proposal is as follows: an insulating layer (4) is built on the inner wall of the ladle shell (7), and a solid oxide fuel cell layer (3) is arranged on the inner wall of the insulating layer (4) in a cling manner. An electromagnetic coil (2) is arranged on the inner wall of the solid oxide fuel cell layer (3) above the slag line, and slag line bricks (1) are laid close to the inner wall of the electromagnetic coil (2). The inner wall of the solid oxide fuel cell layer (3) below the slag line of the wall is provided with a wall-covering brick (5); a brick cup layer (8) is built on the inner wall of the solid oxide fuel cell layer (3) at the bottom of the ladle. The solid oxide fuel cell layer (3) is flat or tubular, and the thickness of the solid oxide fuel cell layer is 0.3-0.8 times of the thickness of the wall covering bricks (5); the thickness of the electromagnetic coil (2) is 0.2-0.5 times of the thickness of the covering brick (5). The invention has the characteristics of reducing slag entrainment of molten steel, reducing inclusions in steel, improving steel quality, being green and saving energy.
Description
Technical Field
The invention belongs to the technical field of ladle working liners. In particular to a ladle working lining for controlling molten steel slag.
Background
The ladle is used as one of main equipment for secondary refining outside the furnace, and plays an extremely important role in improving the quality of molten steel in the process of secondary refining outside the furnace. The ladle has the main functions of homogenizing alloy elements in molten steel, further deoxidizing, desulfurizing, eliminating inclusion, etc. The interaction between ladle slag and molten steel directly determines the desulfurization and deoxidization efficiency. In order to strengthen the interaction between two phases, a ladle bottom blowing argon is often adopted. In the argon blowing process, bubbles move from bottom to top to drive molten steel to flow, so that the reaction area of the molten steel and a slag layer is increased, desulfurizing agents and deoxidizing agents in slag are brought into the molten steel, and the desulfurizing and deoxidizing rate is improved; and argon blowing at the bottom of the ladle can be used for homogenizing the temperature and the components of molten steel and promoting the floating of inclusions. Meanwhile, under the unreasonable argon blowing parameter, the argon blowing process also causes the problems of secondary oxidation and excessive heat loss of molten steel and the like caused by slag entrainment of the molten steel and overlarge exposed area of the molten steel. Wherein slag can be rolled up into molten steel by molten steel slag drops and remain in finished products to become large-particle inclusions in the steel, and the quality of the steel is seriously affected. For example, in heavy rail steels, when the inclusion size is greater than 26 μm, fatigue cracks may develop in the steel during use; while the engine valve spring steel requires inclusion sizes less than 15 μm; and the secondary oxidation of molten steel can increase the total oxygen content in the steel, so that the number of oxide inclusions in the steel is increased, for example, for low-carbon low-silicon steel, when the total oxygen content in the steel is increased, excessive nonmetallic inclusions are generated, and the quality of a casting blank is seriously affected. But the above object is not effectively and stably achieved.
Solid oxide fuel cells belong to the third generation of fuel cells, and there are two main market routes for current solid oxide fuel cells: the system is combined with a steam turbine and works at the temperature higher than 850 ℃, the total efficiency of the system is higher than 70%, the system is generally suitable for high-power stations, and the main problem faced by the high temperature is that the material has more severe requirements and the preparation cost is higher; secondly, the fuel is used in low-power places, such as small power stations, scattered living domestic electricity or electric automobiles, and the like, but the problems of huge storage and transportation costs of the fuel are also faced. Solid oxide fuel cells have not been used in the steelmaking field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the steel ladle working lining which can reduce molten steel slag, reduce inclusions in steel, improve steel quality and control molten steel slag in a green and energy-saving way.
In order to achieve the above purpose, the invention adopts the following technical scheme: the ladle working lining comprises slag line bricks, an electromagnetic coil, a solid oxide fuel cell layer, a heat preservation layer, ladle wall bricks, a brick seat layer and a ladle shell. The ladle shell consists of a ladle wall shell and a ladle bottom shell; an insulating layer is built on the inner wall of the ladle shell, and a solid oxide fuel cell layer is arranged on the inner wall of the insulating layer in a manner of being clung to the insulating layer.
An electromagnetic coil is arranged on the inner wall of the solid oxide fuel cell layer above the slag line of the wall, and slag line bricks are laid on the inner wall of the electromagnetic coil. The positive electrode and the negative electrode of the solid oxide fuel cell layer are respectively and correspondingly connected with the electromagnetic coil through respective wires, and the positive electrode wires are connected with a current controller. Wall-covering bricks are arranged on the inner wall of the solid oxide fuel cell layer below the wall-covering slag line; and a brick layer is built on the inner wall of the solid oxide fuel cell layer of the bottom-covered shell.
And air bricks and tapping hole bricks are respectively built on the inner wall of the bottom-covering shell from outside to inside to the brick cup layer along the plumb line direction.
The solid oxide fuel cell layer is one of a flat plate type and a tubular type; the thickness of the solid oxide fuel cell layer is 0.3-0.8 times of the thickness of the covering bricks; the electrolyte of the solid oxide fuel cell layer is yttria stabilized zirconia, fluorite structure doped cerium oxide and perovskite structure doped LaGaO 3 One of the following; the cathode material of the solid oxide fuel cell layer is one of manganate-based oxide, cobaltate-based oxide, ferrite-based oxide, porous platinum and praseodymium oxide-doped zirconia; the anode material of the solid oxide fuel cell layer is one of nickel powder dispersed yttrium oxide stabilized zirconia and porous platinum.
The thickness of the electromagnetic coil is 0.2-0.5 times of the thickness of the covering brick; the number of turns of the electromagnetic coil is 500-8000 turns; the electromagnetic wire of the electromagnetic coil is one of an inorganic insulating electromagnetic wire, a glass film micro-thin wire, a high-temperature insulating wire and a carbon fiber heating wire, and the diameter of the electromagnetic wire is 0.3-3.2 mm.
The slag line brick, the wall covering brick and the brick cup layer form a working layer.
The slag line brick is made of one of high aluminum and magnesium carbon; the thickness of the slag line brick is 1.1-1.3 times of the thickness of the covering wall brick.
The wall-covering brick is made of one of aluminum-magnesium spinel, high-aluminum brick and aluminum-magnesium carbon.
The brick layer is made of one of cerite, aluminum magnesium spinel, aluminum magnesium and high aluminum.
The heat-insulating layer is made of one of alumina, diatomite and calcium silicate.
By adopting the technical scheme, the invention has the beneficial effects that:
after tapping of the converter, molten steel and steel slag enter a steel ladle, argon is blown into the steel ladle from an air brick at the bottom of the steel ladle for 1-3 minutes, the temperature of a refractory material working layer and a solid oxide fuel cell layer is increased, and solid electrolyte in the solid oxide fuel cell layer is changed into oxygen ions (O) at high temperature 2- ) And the conductor is used for introducing fuel and oxygen into the solid oxide fuel cell layer, at the moment, the solid oxide fuel cell layer and the electromagnetic coil are connected, the solid oxide fuel cell layer starts to work, the current is regulated by the current controller, the electromagnetic coil is electrified and generates a magnetic field, the viscosity and the movement state of the steel slag are changed under the action of the magnetic field, and the slag reeling degree of the molten steel is obviously reduced.
Aiming at the phenomena that slag is easily rolled up in molten steel and the exposed area of the molten steel is too large to cause excessive secondary oxidization and heat loss of the molten steel in the ladle secondary refining process, the invention replaces the original permanent layer of the ladle (the electrolyte is zirconia and other oxides with excellent high-temperature performance) by utilizing the high-efficiency green energy-saving solid oxide fuel cell layer, and provides a power supply for the electromagnetic coil to form a magnetic field to control the viscosity and the movement state of steel slag in the argon blowing process, thereby weakening the slag rolling of the molten steel, reducing the quantity of large-particle inclusions in the molten steel, improving the problems of secondary oxidization and excessive heat loss of the molten steel, and playing the roles of purifying the molten steel and reducing the energy consumption.
The solid oxide fuel cell layer provides enough current for the electromagnetic coil, and the magnetic field intensity can be controlled by adjusting the output current of the solid oxide fuel cell layer, so that the magnetic field can be adjusted according to the actual smelting condition of molten steel in the ladle, and the solid oxide fuel cell has higher practicability. The size of the solid oxide fuel cell layer has flexibility, and the size can be adjusted according to the ladle with actual capacity; the electrolyte of the solid oxide fuel cell layer is oxides such as zirconia with excellent high-temperature performance, and can replace the original ladle refractory material permanent layer, so that on one hand, the heat dissipated by the ladle can heat the electrolyte of the solid oxide fuel cell layer, the working cost is reduced, and the working speed is improved; on the other hand, the high-quality waste heat generated by the operation of the solid oxide fuel cell layer can also play a role in heat preservation for the steel ladle, reduce the temperature drop of molten steel, reduce the fuel use in the steelmaking process, complement the advantages of the two, and have the advantages of green and energy conservation.
Therefore, the invention has the characteristics of reducing slag entrainment of molten steel, reducing inclusions in steel, improving steel quality and saving energy.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, which should not be construed as limiting the invention.
Example 1
A ladle working lining for controlling molten steel slag. As shown in fig. 1, the ladle working lining comprises a slag line brick (1), an electromagnetic coil (2), a solid oxide fuel cell layer (3), an insulating layer (4), a ladle wall brick (5), a seat brick layer (8) and a ladle shell (7). The ladle shell (7) is composed of a ladle wall shell and a ladle bottom shell; an insulating layer (4) is built on the inner wall of the ladle shell (7), and a solid oxide fuel cell layer (3) is arranged on the inner wall of the insulating layer (4) in a cling manner.
As shown in fig. 1, an electromagnetic coil (2) is arranged on the inner wall of the solid oxide fuel cell layer (3) above the slag line of the ladle wall, and slag line bricks (1) are laid close to the inner wall of the electromagnetic coil (2); the positive electrode and the negative electrode of the solid oxide fuel cell layer (3) are respectively and correspondingly connected with the electromagnetic coil (2) through respective leads, and the positive electrode leads are connected with a current controller. A wall covering brick (5) is arranged on the inner wall of the solid oxide fuel cell layer (3) below the wall covering slag line; a brick cup layer (8) is built on the inner wall of the solid oxide fuel cell layer (3) of the bottom-covered shell.
As shown in fig. 1, air bricks (10) and tapping hole bricks (9) are respectively built on the inner wall of the bottom-covering shell from outside to inside to the brick cup layer (8) along the plumb line direction.
The solid oxide fuel cell layer (3) is flat plate type; the thickness of the solid oxide fuel cell layer (3) is 0.3-0.6 times of the thickness of the covering bricks (5); the electrolyte of the solid oxide fuel cell layer (3) is yttria stabilized zirconia; the cathode material of the solid oxide fuel cell layer (3) is manganate-based oxide; the anode material of the solid oxide fuel cell layer (3) is nickel powder dispersed yttrium oxide stabilized zirconia.
The thickness of the electromagnetic coil (2) is 0.2-0.3 times of the thickness of the covering brick (5); the number of turns of the electromagnetic coil (2) is 500-4000 turns; the electromagnetic wire of the electromagnetic coil (2) is an inorganic insulation electromagnetic wire, and the diameter of the electromagnetic wire is 0.3-1.3 mm.
The slag line brick (1), the covering wall brick (5) and the brick cup layer (8) form a working layer.
The slag line brick (1) is made of high aluminum; the thickness of the slag line brick (1) is 1.1-1.3 times of the thickness of the covering wall brick (5).
The wall-covering brick (5) is made of aluminum magnesium spinel.
The brick cup layer (8) is made of waxstone.
The heat insulation layer (4) is made of alumina.
Example 2
A ladle working lining for controlling molten steel slag. Example 1 was repeated except for the following technical parameters:
the solid oxide fuel cell layer (3) is tubular; the thickness of the solid oxide fuel cell layer (3) is 0.4-0.7 times of the thickness of the covering bricks (5); the electrolyte of the solid oxide fuel cell layer (3) is fluorite structure doped cerium oxide; the cathode material of the solid oxide fuel cell layer (3) is one of ferrite oxide, porous platinum and praseodymium oxide doped zirconia; the anode material of the solid oxide fuel cell layer (3) is porous platinum.
The thickness of the electromagnetic coil (2) is 0.3-0.4 times of the thickness of the covering brick (5); the number of turns of the electromagnetic coil (2) is 2000-6000 turns; the electromagnetic wire of the electromagnetic coil (2) is a glass film micro-thin wire, and the diameter of the electromagnetic wire is 1.0-2.3 mm.
The slag line brick (1) is made of magnesia carbon; the thickness of the slag line brick (1) is 1.1-1.3 times of the thickness of the covering wall brick (5).
The wall-wrapping bricks (5) are made of high-alumina bricks.
The brick cup layer (8) is made of aluminum magnesium spinel.
The heat preservation layer (4) is made of diatomite.
Example 3
A ladle working lining for controlling molten steel slag. Example 1 was repeated except for the following technical parameters:
the solid oxide fuel cell layer (3) is tubular; the thickness of the solid oxide fuel cell layer (3) is 0.5-0.8 times of the thickness of the covering bricks (5); the electrolyte of the solid oxide fuel cell layer (3) is perovskite structure doped LaGaO 3 The method comprises the steps of carrying out a first treatment on the surface of the The cathode material of the solid oxide fuel cell layer (3) is a cobaltate-based oxide; the anode material of the solid oxide fuel cell layer (3) is porous platinum.
The thickness of the electromagnetic coil (2) is 0.4-0.5 times of the thickness of the covering brick (5); the number of turns of the electromagnetic coil (2) is 4000-8000 turns; the electromagnetic wire of the electromagnetic coil (2) is a high-temperature insulated wire or a carbon fiber heating wire, and the diameter of the electromagnetic wire is 2.0-3.2 mm.
The slag line brick (1) is made of magnesia carbon; the thickness of the slag line brick (1) is 1.1-1.3 times of the thickness of the covering wall brick (5).
The wall-covering brick (5) is made of aluminum, magnesium and carbon.
The brick cup layer (8) is made of aluminum-magnesium or high-aluminum.
The heat-insulating layer (4) is made of calcium silicate.
Compared with the prior art, the invention has the following beneficial effects:
the invention is thatAfter tapping of the converter, molten steel (6) and steel slag (11) enter a ladle, argon is blown into the ladle from an air brick (10) at the bottom of the ladle for 1-3 minutes, the temperature of a refractory material working layer and a solid oxide fuel cell layer (3) is increased, and solid electrolyte in the solid oxide fuel cell layer (3) becomes oxygen ions (O) at high temperature 2- ) And then, introducing fuel and oxygen into the solid oxide fuel cell layer (3), at the moment, switching on the solid oxide fuel cell layer (3) and the electromagnetic coil (2), starting the solid oxide fuel cell layer (3), regulating current through the current controller, electrifying the electromagnetic coil (2) and generating a magnetic field, wherein the viscosity and the motion state of the steel slag (11) are changed under the action of the magnetic field, and the slag reeling degree of the molten steel (6) is obviously reduced.
Aiming at the phenomena that slag is rolled up by the molten steel (6) and the exposed area of the molten steel (6) is too large to cause secondary oxidization and excessive heat loss of the molten steel (6) in the ladle secondary refining process, the invention replaces the original permanent layer of the ladle (the electrolyte of which is zirconia and other oxides with excellent high-temperature performance) by utilizing the high-efficiency green energy-saving solid oxide fuel cell layer (3) and provides a power supply for the electromagnetic coil (2) so as to form a magnetic field to control the viscosity and the movement state of the steel slag (11) in the argon blowing process, thereby weakening the slag rolling up of the molten steel (6), reducing the quantity of large-particle inclusions in the molten steel (6), improving the problems of secondary oxidization and excessive heat loss of the molten steel (6) and playing the roles of purifying the molten steel (6) and reducing the energy consumption.
The solid oxide fuel cell layer (3) provides enough current for the electromagnetic coil (2), and the magnetic field intensity can be controlled by adjusting the output current of the solid oxide fuel cell layer (3), so that the magnetic field can be adjusted according to the actual smelting condition of the molten steel (6) in the ladle, and the solid oxide fuel cell has higher practicability. The solid oxide fuel cell layer (3) has flexibility in size, and the size can be adjusted according to the ladle with actual capacity; the electrolyte of the solid oxide fuel cell layer (3) is oxide such as zirconia with excellent high-temperature performance, and can replace the original ladle refractory material permanent layer, so that on one hand, the heat dissipated by the ladle can heat the electrolyte of the solid oxide fuel cell layer (3), thereby reducing the working cost and improving the working speed; on the other hand, the high-quality waste heat generated by the operation of the solid oxide fuel cell layer (3) can also play a role in heat preservation for the steel ladle, reduce the temperature drop of molten steel, reduce the fuel use in the steelmaking process, and have the advantages of being green and energy-saving.
Therefore, the invention has the characteristics of reducing slag entrainment of molten steel, reducing inclusions in steel, improving steel quality and saving energy.
Claims (5)
1. A ladle working lining for controlling molten steel slag coiling, which is characterized in that: the ladle working lining comprises a slag line brick (1), an electromagnetic coil (2), a solid oxide fuel cell layer (3), an insulating layer (4), a ladle wall brick (5), a seat brick layer (8) and a ladle shell (7); the ladle shell (7) consists of a ladle wall shell and a ladle bottom shell, an insulating layer (4) is built on the inner wall of the ladle shell (7), and a solid oxide fuel cell layer (3) is arranged on the inner wall of the insulating layer (4) in a cling manner;
an electromagnetic coil (2) is arranged on the inner wall of the solid oxide fuel cell layer (3) above the slag line of the wall, and slag line bricks (1) are built on the inner wall of the electromagnetic coil (2); the positive electrode and the negative electrode of the solid oxide fuel cell layer (3) are respectively and correspondingly connected with the electromagnetic coil (2) through respective leads, and the positive electrode leads are connected with a current controller; a wall covering brick (5) is arranged on the inner wall of the solid oxide fuel cell layer (3) below the wall covering slag line; a brick cup layer (8) is built on the inner wall of the solid oxide fuel cell layer (3) of the bottom-covered shell;
an air brick (10) and a tapping hole brick (9) are respectively built on the inner wall of the bottom-covering shell from outside to inside to the brick cup layer (8) along the plumb line direction;
the solid oxide fuel cell layer (3) is one of a flat plate type and a tubular type; the thickness of the solid oxide fuel cell layer (3) is 0.3-0.8 times of the thickness of the covering bricks (5); the electrolyte of the solid oxide fuel cell layer (3) is yttria stabilized zirconia, fluorite structure doped cerium oxide and perovskite structure doped LaGaO 3 One of the following; the cathode material of the solid oxide fuel cell layer (3) is manganateOne of a base oxide, a cobaltate base oxide, a ferrite base oxide, porous platinum, praseodymium oxide doped zirconia; the anode material of the solid oxide fuel cell layer (3) is one of nickel powder dispersed yttrium oxide stabilized zirconia and porous platinum;
the thickness of the electromagnetic coil (2) is 0.2-0.5 times of the thickness of the covering brick (5); the number of turns of the electromagnetic coil (2) is 500-8000 turns; the electromagnetic wire of the electromagnetic coil (2) is one of an inorganic insulating electromagnetic wire, a glass film micro-thin wire, a high-temperature insulating wire and a carbon fiber heating wire, and the diameter of the electromagnetic wire is 0.3-3.2 mm;
the slag line brick (1), the covering wall brick (5) and the brick cup layer (8) form a working layer.
2. The ladle working lining for controlling molten steel slag coiling according to claim 1, wherein the slag line brick (1) is made of one of high aluminum and magnesium carbon; the thickness of the slag line brick (1) is 1.1-1.3 times of the thickness of the covering wall brick (5).
3. The ladle working lining for controlling molten steel slag according to claim 1, wherein the material of the ladle wall brick (5) is one of aluminum magnesium spinel, high aluminum brick and aluminum magnesium carbon.
4. The steel ladle working lining for controlling molten steel slag according to claim 1, wherein the brick cup layer (8) is made of one of waxiness, alminium and high aluminum.
5. The steel ladle working lining for controlling molten steel slag according to claim 1, wherein the heat-insulating layer (4) is made of one of alumina, diatomite and calcium silicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450678.XA CN108145144B (en) | 2017-12-27 | 2017-12-27 | Ladle working lining for controlling molten steel slag winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450678.XA CN108145144B (en) | 2017-12-27 | 2017-12-27 | Ladle working lining for controlling molten steel slag winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108145144A CN108145144A (en) | 2018-06-12 |
| CN108145144B true CN108145144B (en) | 2023-08-15 |
Family
ID=62463234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711450678.XA Active CN108145144B (en) | 2017-12-27 | 2017-12-27 | Ladle working lining for controlling molten steel slag winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108145144B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299560B (en) * | 2020-04-08 | 2021-11-30 | 河北新兴铸管有限公司 | Ladle slag gathering device and slag gathering method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105531861A (en) * | 2013-09-04 | 2016-04-27 | 赛瑞斯知识产权有限公司 | Metal supported solid oxide fuel cell |
| WO2017090819A1 (en) * | 2015-11-27 | 2017-06-01 | 주식회사 포스코 | Nozzle, casting device, and casting method |
| CN107042299A (en) * | 2017-06-16 | 2017-08-15 | 武汉科技大学 | The control device and method of a kind of refining ladle slag emulsification |
-
2017
- 2017-12-27 CN CN201711450678.XA patent/CN108145144B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105531861A (en) * | 2013-09-04 | 2016-04-27 | 赛瑞斯知识产权有限公司 | Metal supported solid oxide fuel cell |
| WO2017090819A1 (en) * | 2015-11-27 | 2017-06-01 | 주식회사 포스코 | Nozzle, casting device, and casting method |
| CN107042299A (en) * | 2017-06-16 | 2017-08-15 | 武汉科技大学 | The control device and method of a kind of refining ladle slag emulsification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108145144A (en) | 2018-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107760823B (en) | Quasi-continuous steelmaking system and process of full scrap steel electric arc furnace | |
| WO2009111973A1 (en) | Method for treating spheroidal graphite iron and pouring device thereof | |
| CN112342333A (en) | High-efficiency low-oxygen-level ultra-low-carbon steel production method | |
| WO2017054299A1 (en) | Triplex stainless steel manufacturing process via rkef-based ferronickel and ferrochrome production and aod furnace | |
| CN111635977B (en) | Full-continuous ultrashort electric arc furnace steelmaking flow production equipment and process | |
| CN109628697B (en) | High-carbon dephosphorization method for smelting medium-high carbon steel grade in converter | |
| CN202626234U (en) | Refining device for smelting low-carbon steel and ultra-low carbon steel by utilizing Ar/O2 plasma | |
| CN106048507A (en) | Decarburizing annealing and blueing treatment method for Si-free Mn-containing semi-processed non-oriented silicon steel | |
| CN108145144B (en) | Ladle working lining for controlling molten steel slag winding | |
| CN109402327A (en) | A kind of external refining production method of super clean high-carbon-chromium bearing steel | |
| CN2859418Y (en) | A direct current arc inductive stove | |
| CN103252459B (en) | A kind of method being improved Cleanliness of Molten Steel and crystal grain thinning by ultrasonic wave | |
| CN102313447A (en) | Medium-frequency induction heating furnace for smelting nonmetallic high-melting-point oxide | |
| CN110423862A (en) | A kind of double hose electromagnetic agitation RH device and method | |
| CN201434601Y (en) | Two-phase electric arc furnace | |
| CN201217071Y (en) | Electric furnace apparatus for thermal insulation of nodular cast iron original iron liquor and pre-spheroidizing processing | |
| CN105671238B (en) | A kind of method for modifying of flat cold-rolled sheet slag | |
| CN209024583U (en) | Double-station electric arc furnace | |
| CN220812507U (en) | Miniature inclusion removing device for LF-RH furnace | |
| CN207103820U (en) | A kind of control device of refining ladle slag emulsification | |
| CN1415768A (en) | Refining technique for producing copper containing ultra low oxygen | |
| CN101487666B (en) | Biphase ore furnace and its smelting method | |
| CN102732677B (en) | Refining method for preventing carbureting of molten steel in LF (ladle furnace) through utilizing argon plasmas | |
| CN101323892B (en) | Bottom anode side conductive direct current ladle furnace | |
| CN101736122B (en) | Method for improving recovery rate of smelt nonmagnetic steel aluminum |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |