CN203582895U - Integrated ladle refining equipment - Google Patents
Integrated ladle refining equipment Download PDFInfo
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- CN203582895U CN203582895U CN201320789200.0U CN201320789200U CN203582895U CN 203582895 U CN203582895 U CN 203582895U CN 201320789200 U CN201320789200 U CN 201320789200U CN 203582895 U CN203582895 U CN 203582895U
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- ladle
- steel
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- refining
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 33
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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Images
Abstract
The utility model discloses integrated ladle refining equipment. The integrated ladle refining equipment comprises a ladle, a first ladle cover which is matched with the ladle and used for implementing LF refining and a second ladle cover which is matched with the ladle and used for implementing VOD refining, wherein a ladle base for supporting the ladle is connected to the bottom of the ladle; a first rotating mechanism through which the first ladle cover is connected with or separated away from the ladle and a first lifting mechanism for lifting the first ladle cover are arranged on one side of the ladle; and a second rotating mechanism through which the second ladle cover is connected with or separated away from the ladle and a second lifting mechanism for lifting the second ladle cover are arranged on the other side of the ladle. The refining equipment disclosed by the utility model can finish the whole refining process of LF refining and VOD refining through one device, and can be matched with a medium-frequency induction melting furnace so as to enhance using effect of the medium-frequency induction melting furnace.
Description
Technical field
The utility model relates to steelmaking technical field, particularly relates to a kind of integrated ladle refining furnace equipment.
Background technology
The melting 80% of casting, forging and the special steel of domestic and international little tonnage steel part at present all adopts medium frequency induction melting furnace.Defect due to medium frequency induction melting furnace self: 1, starting material need to be selected, can not adjust kind and the composition of smelting steel; 2, pouring temperature is low; 3, cannot slag refining, oxygen decarburization, Argon stirring, vacuum outgas and adjusting component.Cause quality product cannot be up to standard, cannot improve, cannot guarantee, can not produce many variety steels by product requirement.
Through the molten steel of medium frequency induction melting furnace melting, its molten steel top temperature is 1650 ℃, through casting ladle, be transported to when casting approximately 1550 ℃ of temperature.For different steel grades, varying environment is wished ladle molten steel insulation, is heated up, to meet the teeming temperature of each variety steel.For molten steel more than 20t, be all generally to adopt LF ladle refining furnace electric-arc heating, improve liquid steel temperature.And for the little tonnage molten steel of 3t～15t, ladle is little, volume is little, molten steel cools speed is fast, adopt electric-arc heating intensification tool to acquire a certain degree of difficulty, the molten steel insulation of little tonnage LF ladle refining furnace anxious to be resolved and intensification problem.In medium frequency induction melting furnace fusing whole process, although electromagnetic induction coil has stirring action to molten steel, operation does not reach the ideal effect stirring in ladle bottom Argon.By Argon, stir, could and add slag thing the gas of molten steel inside (oxygen, hydrogen, nitrogen) and get rid of, molten steel is purified.Medium frequency induction melting furnace is body of heater topples over, and by the tap hole on ladle top, is cast.Cannot implement, without slag casting, therefore cannot guarantee that being mingled with gas content of steel part is up to standard, need to solve without slag casting problem.During medium frequency induction melting furnace steel, cannot add slag charge to carry out refining, cannot remove oxygen, hydrogen, nitrogen, sulphur and slag inclusion thing in molten steel.By LF stove add slag refining, can remove oxygen and the non-metallic inclusion sulphur of about 10ppm.For special steel, the oxygen level of steel and carbon content have strict requirement, must reach required value through vacuum outgas and vacuum oxygen.And medium frequency induction melting furnace not possesses above condition.For the big-and-middle-sized Special Steel Works of the above tonnage of 20t, all by VOD refining furnace independently, complete.And little tonnage, especially 1～6t be because molten steel volume is little, molten steel cools speed is fast, for VOD vacuum oxygen refining, exists certain difficulty.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of integrated ladle refining unit is provided.This integrated ladle refining unit can complete whole refining processs of LF refining and VOD refining by a set of equipment, can be used in conjunction with to improve medium frequency induction melting furnace result of use with medium frequency induction melting furnace, is mainly applicable to little tonnage steel-making.
For achieving the above object, the technical solution adopted in the utility model is: integrated ladle refining unit, it is characterized in that: comprise ladle, for matching with ladle, carry out the first steel ladle cover of LF refining and the second steel ladle cover that carries out VOD refining for matching with ladle, the bottom of described ladle is connected with for supporting the ladle seat of ladle, and a side of described ladle is provided with for driving the first rotating mechanism that the first steel ladle cover is connected or departs from ladle and the first hoisting appliance that drives the first steel ladle cover lifting; The opposite side of described ladle is provided with for driving the second rotating mechanism that the second steel ladle cover is connected or departs from ladle and the second hoisting appliance that drives the second steel ladle cover lifting.
Above-mentioned integrated ladle refining unit, is characterized in that: the upper opening of described ladle is up-small and down-big taper; The bottom of described ladle is connected with Argon pipe.
Above-mentioned integrated ladle refining unit, is characterized in that: in described the second steel ladle cover, be provided with pushing off the slag lid, in described the second steel ladle cover and the top that is positioned at pushing off the slag lid is provided with water-cooled screening cover.
Above-mentioned integrated ladle refining unit, is characterized in that: on described the second steel ladle cover, be provided with vacuum feeding device; The vacuum hopper that described vacuum feeding device comprises receiving hopper and is arranged on receiving hopper below and is communicated with receiving hopper, described vacuum hopper is connected with the second steel ladle cover, the outlet of described receiving hopper is provided with the first sealing member, the outlet of described vacuum hopper is provided with the second sealing member, in described receiving hopper, be provided for driving the first cylinder of the first sealing member lifting, in described vacuum hopper, be provided with for driving the second cylinder of the second sealing member lifting, on described vacuum hopper, be connected with the Vacuum Balance pipe for being communicated with ladle.
Above-mentioned integrated ladle refining unit, it is characterized in that: described ladle seat is the hollow structure of inner hollow and upper opening, the upper opening of described ladle seat is connected with the sealed bottom of ladle, the sidewall of described ladle seat offers safe bleed-out outlet, in described safe bleed-out outlet, be provided with the lid that is easy to be melted by molten steel, a side of described ladle seat is provided with described safe bleed-out and exports corresponding molten steel splendid attire dish.
Above-mentioned integrated ladle refining unit, is characterized in that: comprise for ladle and ladle seat being vacuumized to the vacuum extractor of processing; Described vacuum extractor comprises the first valve tube, the second valve tube, the 3rd valve tube and the 4th valve tube, described first valve tube one end is connected with vacuum pump, described the second valve tube is connected with the first valve tube, the second steel ladle cover is stretched in one end of described the 3rd valve tube, the other end of described the 3rd valve tube is communicated with or disconnects with the second valve tube under the drive of the second rotating mechanism, and described the 3rd valve tube is made by corrugated expansion joint; One end of described the 4th valve tube is connected with the first valve tube, and it is inner that the other end of described the 4th valve tube stretches into ladle seat.
Above-mentioned integrated ladle refining unit, it is characterized in that: on described the second steel ladle cover, be provided with the oxygen rifle and the oxygen lance lifting device that stretch into the second steel ladle cover inside, described oxygen lance lifting device comprises the guidepost being vertically arranged on the second steel ladle cover and is arranged on the sliding support on guidepost, and the oxygen lance lifting driving mechanism for driving sliding support to move up and down along guidepost, described oxygen rifle is arranged on sliding support.
Above-mentioned integrated ladle refining unit, it is characterized in that: on described the first rotating mechanism, be provided with for stretching into electrode and the electrode lifting device of the first steel ladle cover, described electrode lifting device comprises for the transverse arm of holding electrode with for the fixing transverse arm pillar stiffener of transverse arm, and described transverse arm pillar stiffener below is provided with the rise fall of electrodes driving mechanism for driving transverse arm pillar stiffener to move up and down along the first rotating mechanism.
The utility model compared with prior art has the following advantages:
1, the utility model is simple in structure, rationally novel in design, is easy to install.
2, the utility model is in place motionless on ladle seat by described ladle ladle, only order lifting, the rotation by the first steel ladle cover and the second steel ladle cover matches with ladle and then LF refining and VOD refining switched, complete whole refining processs of LF refining and VOD refining, this integration apparatus cost is low, easy to use.
3, the utility model is by being designed to up-small and down-big taper by described ladle 10 upper openings, and the particular design of ladle upper opening, has dwindled the area of dissipation of ladle upper opening, thereby has improved the heat insulation effect of ladle.
4, the utility model is by arranging vacuum feeding device, when VOD refining, and when feeding in raw material by making vacuum hopper consistent with the vacuum tightness of ladle, thereby convenient the second sealing member is opened, can also prevent when reinforced to ladle owing to pressing the raw shock action of the sell of one's property.
In sum, the utility model is when supporting the use with medium frequency induction melting furnace, improved greatly medium frequency induction melting furnace result of use, improved greatly all drawbacks that medium frequency induction melting furnace in use exists, avoid simultaneously medium frequency induction melting furnace cannot with large-scale LF refining furnace and the matching used defect of VOD refining furnace.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model when LF refining.
Fig. 2 is the structural representation of the utility model when VOD refining.
Fig. 3 is the annexation schematic diagram of the utility model vacuum feeding device and the second steel ladle cover.
Fig. 4 is the structural representation of the utility model oxygen lance lifting device.
Description of reference numerals:
The 1-the second steel ladle cover; 2-oxygen rifle; 3-oxygen lance lifting device;
3-1-sliding support; 3-2-guidepost; 3-3-driving chain;
3-4-drive sprocket; 3-5-driven sprocket; 4-vacuum feeding device;
4-1-receiving hopper; 4-2-vacuum hopper; 4-3-the first cylinder;
4-4-the second cylinder; 4-5-the first sealing member; 4-6-the second sealing member;
The 5-the second rotating mechanism; 5-1-rotating bearing support; 5-2-drive-motor;
5-3-driving toothed gear; 5-4-follower gear; 5-5-rotating base;
5-6-the second column bracket; The 6-the first steel ladle cover; 7-vacuum extractor;
7-1-the first valve tube; 7-2-the second valve tube; 7-3-three valve tube;
7-4-four valve tube; 8-ladle seat; 9-lid;
10-ladle; The 11-the first rotating mechanism; The 12-the first hoisting appliance;
13-furnace transformer; 14-short net; 15-electrode;
16-electrode lifting device; 16-1-transverse arm; 16-2-transverse arm pillar stiffener;
16-3-pillar stiffener hoist cylinder; 17-Argon pipe; 18-water-cooled screening cover;
19-pushing off the slag lid; 20-gas permeable brick; 21-slide gate nozzle;
22-add cinder notch; 23-molten steel splendid attire dish; 24-manual observation mouth;
The 25-the second hoisting appliance.
Embodiment
A kind of integrated ladle refining unit as depicted in figs. 1 and 2, comprise ladle 10, for matching with ladle 10, carry out the first steel ladle cover 6 of LF refining and the second steel ladle cover 1 that carries out VOD refining for matching with ladle 10, the bottom of described ladle 10 is connected with for supporting the ladle seat 8 of ladle 10, and a side of described ladle 10 is provided with for driving the first rotating mechanism 11 that the first steel ladle cover 6 is connected or departs from ladle and the first hoisting appliance 12 that drives the first steel ladle cover 6 liftings; The opposite side of described ladle 10 is provided with for driving the second rotating mechanism 5 that the second steel ladle cover 1 is connected or departs from ladle 10 and the second hoisting appliance 25 that drives the second steel ladle cover 1 lifting.
In the present embodiment, by LF refining and VOD refining are carried out to integrated design, and facilitated the switching of ladle 10 being carried out to LF refining and VOD refining, when LF refining, complete electric-arc heating, slag refining and Argon stir, when VOD refining, carry out oxygen decarburization, vacuum outgas, Argon stirs, said process all carries out in a ladle, described ladle 10 and ladle seat 8 maintain static, only by the lifting of the first steel ladle cover 6 and the second steel ladle cover 1, rotation matches with ladle 10 and then LF refining and VOD refining is switched, complete whole refining processs of LF refining and VOD refining, especially when VOD refining, cancelled the structure of original large vacuum tank and large vacuum cover, simple and quick while adopting this integrated ladle refining unit, described ladle 10 spatial contents are relatively little, vacuumize than comparatively fast, shortened refining time, approximately 3 minutes vacuum suction time, VOD refining process approximately 30～40 minutes, support the use with medium frequency induction melting furnace, improved greatly medium frequency induction melting furnace result of use, all drawbacks that medium frequency induction melting furnace in use exists have been improved, reduce and large-scale LF refining furnace and the matching used defect of VOD refining furnace simultaneously.
In the present embodiment, principle of work and the structure of described the first rotating mechanism 11 and the second rotating mechanism 5 are all identical, described the second rotating mechanism 5 comprises rotating base 5-5, be rotatably connected on rotating bearing support 5-1 and drive-motor 5-2 on rotating base 5-5, the output shaft of described drive-motor 5-2 is provided with driving toothed gear 5-3, on described rotating bearing support 5-1, be provided with the follower gear 5-4 being meshed with driving toothed gear 5-3, on described rotating bearing support 5-1, be provided with the second column bracket 5-6, described the second steel ladle cover 1 is arranged on the second column bracket 5-6 away from one end of rotating bearing support 5-1, during use, by drive-motor 5-2, drive driving toothed gear 5-3 to rotate, described driving toothed gear 5-3 drives follower gear 5-4 to rotate, described follower gear 5-4 drives rotating bearing support 5-1 to rotate on rotating base 5-5, thereby drive the second column bracket 5-6 and the second steel ladle cover 1 rotation, its second steel ladle cover 1 is completed and be connected with ladle 10 and depart from.
In the present embodiment, principle of work and the structure of described the first hoisting appliance 12 and the second hoisting appliance 25 are all identical, described the first hoisting appliance 12 comprises two elevating chain 12-1 and is arranged on four jockey sprocket 12-2 on the first column bracket 11-1 of the first rotating mechanism 11, on described the first column bracket 11-1, be also provided with for driving the hoist cylinder of elevating chain 12-1, one end of described elevating chain 12-1 is connected with the piston rod of described hoist cylinder, the other end of described elevating chain 12-1 is walked around jockey sprocket 12-2 and is connected with the top of the first steel ladle cover 6, during use, by the flexible of two described hoist cylinder piston rods, drive respectively two elevating chain 12-1 to move, thereby drive the first steel ladle cover 6 liftings.
As shown in Figure 1, the upper opening of described ladle 10 is up-small and down-big taper, and the bottom of described ladle 10 is connected with Argon pipe 17.By ladle 10 upper openings are carried out to particular design, dwindled the area of dissipation of opening, thereby improved the heat insulation effect of ladle 10.And by carrying out Argon stirring in ladle 10 bottoms, by Argon, stir, can be effectively the gas of molten steel inside (oxygen, hydrogen, nitrogen) with add slag thing and get rid of, molten steel is purified, and Argon pipe 17 is arranged on ladle 10 bottoms, guaranteed, when LF refining and VOD refining, ladle is carried out to omnidistance Argon the impact while not switched by the first steel ladle cover 6 and the second steel ladle cover 1.
As shown in Figure 2, be provided with pushing off the slag lid 19 in described the second steel ladle cover 1, in described the second steel ladle cover 1 and top that is positioned at pushing off the slag lid 19 is provided with water-cooled screening cover 18.By pushing off the slag lid 19 is set, can when oxygen decarburization, prevent that the slag charge that is suspended in liquid steel level from splashing, by water-cooled screening cover 18 is set, prevent that the molten steel splashing from causing damage to steel ladle cover, reduced the baking at steel ladle cover top.
As shown in Figure 3, on described the second steel ladle cover 1, be provided with vacuum feeding device 4, the vacuum hopper 4-2 that described vacuum feeding device 4 comprises receiving hopper 4-1 and is arranged on receiving hopper 4-1 below and is communicated with receiving hopper 4-1, described vacuum hopper 4-2 is connected with the second steel ladle cover 1, the outlet of described receiving hopper 4-1 is provided with the first sealing member 4-5, the outlet of described vacuum hopper 4-2 is provided with the second sealing member 4-6, in described receiving hopper 4-1, be provided for driving the first cylinder 4-3 of the first sealing member 4-5 lifting, in described vacuum hopper 4-2, be provided with for driving the second cylinder 4-4 of the second sealing member 4-6 lifting, on described vacuum hopper 4-2, be connected with the Vacuum Balance pipe for being communicated with ladle 10.On described the second steel ladle cover 1, be provided with manual observation mouth 24.By vacuum feeding device 4 is set, when VOD refining, and when feeding in raw material by making vacuum hopper 4-2 consistent with the vacuum tightness of ladle 10, thereby convenient the second sealing member 4-6 is opened, can also prevent when reinforced to ladle 10 owing to pressing the raw shock action of the sell of one's property.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, described ladle seat 8 is the hollow structure of inner hollow and upper opening, the sidewall of described ladle seat 8 offers safe bleed-out outlet, in described safe bleed-out outlet, be provided with the lid 9 that is easy to be melted by molten steel, a side of described ladle seat 8 is provided with described safe bleed-out and exports corresponding molten steel splendid attire dish 23.The reason of this design is: ladle 10 bottoms are provided with slide gate nozzle 21, when carrying out LF refining and VOD refining, molten steel can flow in ladle seat 8 from slide gate nozzle 21, for avoiding the molten steel of being on the increase in ladle seat 8 to cause security incident, and then take to arrange the outlet of safe bleed-out, lid 9 and molten steel splendid attire dish 23, when the molten steel in ladle seat 8 is on the increase, because liquid steel temperature is high, can be by lid 9 fusings, and then the molten steel in ladle seat 8 enters molten steel splendid attire dish 23 by safe bleed-out outlet, thereby guaranteed the safety in refining process, in the present embodiment, described lid 9 is made by fusible metal aluminium.
As shown in Figure 1, this integrated ladle refining unit comprises for ladle 10 and ladle seat 8 being vacuumized to the vacuum extractor 7 of processing, described vacuum extractor 7 first valve tube 7-1, the second valve tube 7-2, the 3rd valve tube 7-3 and the 4th valve tube 7-4, described first valve tube 7-1 one end is connected with vacuum pump, concrete, described the first vacuum pipe 7-1 lower end is connected by main stop valve with vacuum pump by underground vacuum pipe, described the second valve tube 7-2 is connected with the first valve tube 7-1, the second steel ladle cover 1 is stretched in one end of described the 3rd valve tube 7-3, the other end of described the 3rd valve tube 7-3 is communicated with or disconnects with the second valve tube 7-2 under the drive of the second rotating mechanism 5, described the 3rd valve tube 7-3 is made by corrugated expansion joint, one end of described the 4th valve tube 7-4 is connected with the first valve tube 7-1, and the other end of described the 4th valve tube 7-4 stretches into ladle seat 8 inside.By being set, 7 pairs of ladles 10 of vacuum extractor and ladle seat 8 vacuumize processing, thereby reach the vacuum tightness requirement of VOD refining, but simultaneously by ladle seat 8 is vacuumized to processing, avoid the gas in ladle seat 8 to enter ladle 10 and then destroy the vacuum environment in ladle 10 from the slide gate nozzle 21 of ladle 10 bottoms.And with corrugated expansion joint, make the 3rd valve tube 7-3, can guarantee, when the second rotating mechanism 5 drives the second steel ladle cover 1 rotation, can guarantee the sealing of the 3rd valve tube 7-3, and then facilitate the docking of the 3rd valve tube 7-3 and the second valve tube 7-2.
As depicted in figs. 1 and 2, on described the second steel ladle cover 1, be provided with oxygen rifle 2 and the oxygen lance lifting device 3 that stretches into the second steel ladle cover 1 inside, described oxygen lance lifting device 3 comprises the guidepost 3-2 being vertically arranged on the second steel ladle cover 1 and is arranged on the sliding support 3-1 on guidepost 3-2, and the oxygen lance lifting driving mechanism for driving sliding support 3-1 to move up and down along guidepost 3-2, described oxygen rifle 2 is arranged on sliding support 3-1.By by oxygen rifle 2 and oxygen lance lifting device 3, facilitated the oxygen decarburization when VOD refining, also facilitated oxygen rifle 2 with oxygen lance lifting device 3 with the second steel ladle cover 1 rotation displacement, described oxygen lance lifting driving mechanism comprises driving chain 3-3 and for driving the motor of driving chain 3-3, the output terminal of described motor is connected with drive sprocket 3-4, described drive sprocket 3-4 is arranged on the bottom of guidepost 3-2, the top of described guidepost 3-2 is rotatably connected to driven sprocket 3-5, one end of described driving chain 3-3 is connected on sliding support 3-1, the other end of described driving chain 3-3 is walked around successively driven sprocket 3-5 and drive sprocket 3-4 and is connected on sliding support 3-1, during use, by driven by motor drive sprocket, 3-4 rotates, and then drive sliding support 3-1 to move up and down by driving chain 3-3, in the present embodiment, described drive sprocket 3-4, the quantity of driven sprocket 3-5 and driving chain 3-3 is two.
As shown in Figure 1, on described the first rotating mechanism 11, be provided with for stretching into electrode 15 and the electrode lifting device 16 of the first steel ladle cover 6, described electrode lifting device 16 comprises for the transverse arm 16-1 of holding electrode 15 with for the fixing transverse arm pillar stiffener 16-2 of transverse arm 16-1, and described transverse arm pillar stiffener 16-2 below is provided with the rise fall of electrodes driving mechanism for driving transverse arm pillar stiffener 16-2 to move up and down along the first rotating mechanism 11.By by electrode 15 and electrode lifting device 16, facilitated when LF refining and carried out electric-arc heating by electrode 15, also facilitated electrode 15 with electrode lifting device 16 with the first steel ladle cover 6 rotation displacements, described rise fall of electrodes driving mechanism comprises the pillar stiffener hoist cylinder 16-3 being vertically arranged on the first rotating mechanism 11, and the flexible drive transverse arm pillar stiffener 16-2 by described pillar stiffener hoist cylinder 16-3 piston rod moves up and down along the first rotating mechanism 11.Described electrode 15 joins with furnace transformer 13 by short net 14.
In the present embodiment, a kind of method for making steel of integrated ladle refining unit, comprises the following steps:
Step 1, by just making steel water, pack the step of ladle 10 into;
Step 4, by adjusting the first hoisting appliance 12 and the first rotating mechanism 11, make the first steel ladle cover 6 depart from ladles 10, and make the second steel ladle cover 1 be connected to the step of ladle 10 tops by adjusting the second hoisting appliance 25 and the second rotating mechanism 5;
In the present embodiment, in step 1, from medium frequency induction melting furnace out molten steel when thermometric reaches 1680 ℃, liquid steel sampling is seen to whether reach just steelmaking kind index, then roasting bag makes temperature >=900 ℃ of ladle 10, molten steel is injected to ladle 10, when injecting molten steel, ladle 10 is carried out to omnidistance Argon, molten steel injects ladle 10 by after skimming, ladle 10 handlings being tightly connected to ladle seat 8 and with ladle seat 8, then by Argon pipe 17, through 20 pairs of ladle 10 Argons of gas permeable brick, stir, to measuring temp of molten steel, when temperature reaches 1535 ℃, then after the operation of step 2, carry out again step 3, in step 3, by electrode 15, carry out electric-arc heating, then by the cinder notch 22 that adds on the first steel ladle cover 6, carry out slag inclusion slag making, described slag charge is fluorite, lime, silicon carbide, aluminum shot, ferric oxide etc., simultaneously can be by adding cinder notch 22 adjusting component that feeds in raw material, sampling thermometric, when temperature is more than or equal to 1680 ℃, then after the operation of step 4, the first steel ladle cover 6 and ladle 10 carry out step 5 after sealing by ladle upper flange and bell again, in step 5, first by 7 pairs of ladles 10 of vacuum extractor and ladle seat 8, vacuumize processing, when vacuum tightness is less than 67Pa, then by 2 pairs of molten steel of oxygen rifle, carry out vacuum-oxygen decarbonizing, reinforced to adjust alloying constituent by 4 pairs of molten steel of vacuum feeding device again, and then be less than or equal to 67Pa pressurize ten minutes, break again vacancy reason, sampling thermometric also detects alloying constituent, after adding heat preserving agent, bull ladle is cast again.This method for making steel first carries out LF refining and VOD refining, has shortened greatly refining time, has improved the refining quality of molten steel, and has guaranteed composition and the quality of refining steel.
In the present embodiment, described step 5 comprises the vacuum charging step with adjustment alloying constituent to the interior interpolation alloy raw material of ladle 10, and described vacuum charging step comprises:
Step 501, to the step of adding alloy raw material in receiving hopper 4-1;
Step 502, open the first sealing member 4-5 of receiving hopper 4-1 outlet, close the second sealing member 4-6, make alloy raw material from receiving hopper 4-1, enter the step of vacuum hopper 4-2;
Step 503, close described the first sealing member 4-5, by Vacuum Balance pipe, vacuum hopper 4-2 is communicated with ladle 10, realize the step that vacuum hopper 4-2 is identical with ladle 10 vacuum tightnesss;
Step 504, open the second sealing member 4-6 of vacuum hopper 4-2 outlet, make alloy raw material enter the second steel ladle cover 1 and then fall into the step of ladle 10 from vacuum hopper 4-2.
In the present embodiment, adopt above-mentioned vacuum charging step, effectively guaranteed, in the reinforced process when VOD refining, to make vacuum hopper 4-2 consistent with the vacuum tightness of ladle 10, thereby convenience is opened the second sealing member 4-6, the shock action of giving birth to due to the pressure sell of one's property in the time of can also preventing from feeding in raw material to ladle 10.The operation of above VOD refining is all carried out under vacuum state, by manual observation mouth 24, can observe at any time the interior molten steel situation of ladle 10.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification, change and equivalent structure transformation of above embodiment being done according to the utility model technical spirit, all still belongs in the protection domain of technical solutions of the utility model.
Claims (8)
1. integrated ladle refining unit, it is characterized in that: comprise ladle (10), for matching with ladle (10), carry out first steel ladle cover (6) of LF refining and carry out second steel ladle cover (1) of VOD refining for matching with ladle (10), the bottom of described ladle (10) is connected with for supporting the ladle seat (8) of ladle (10), and a side of described ladle (10) is provided with for driving the first rotating mechanism (11) that the first steel ladle cover (6) is connected or departs from ladle and the first hoisting appliance (12) that drives the first steel ladle cover (6) lifting; The opposite side of described ladle (10) is provided with for driving the second rotating mechanism (5) that the second steel ladle cover (1) is connected or departs from ladle (10) and the second hoisting appliance (25) that drives the second steel ladle cover (1) lifting.
2. integrated ladle refining unit according to claim 1, is characterized in that: the upper opening of described ladle (10) is up-small and down-big taper; The bottom of described ladle (10) is connected with Argon pipe (17).
3. integrated ladle refining unit according to claim 1, it is characterized in that: in described the second steel ladle cover (1), be provided with pushing off the slag lid (19), in described the second steel ladle cover (1) and the top that is positioned at pushing off the slag lid (19) is provided with water-cooled screening cover (18).
4. integrated ladle refining unit according to claim 1, is characterized in that: on described the second steel ladle cover (1), be provided with vacuum feeding device (4), the vacuum hopper (4-2) that described vacuum feeding device (4) comprises receiving hopper (4-1) and is arranged on receiving hopper (4-1) below and is communicated with receiving hopper (4-1), described vacuum hopper (4-2) is connected with the second steel ladle cover (1), the outlet of described receiving hopper (4-1) is provided with the first sealing member (4-5), the outlet of described vacuum hopper (4-2) is provided with the second sealing member (4-6), in described receiving hopper (4-1), be provided for driving first cylinder (4-3) of the first sealing member (4-5) lifting, in described vacuum hopper (4-2), be provided with for driving second cylinder (4-4) of the second sealing member (4-6) lifting, on described vacuum hopper (4-2), be connected with the Vacuum Balance pipe for being communicated with ladle (10).
5. integrated ladle refining unit according to claim 1, it is characterized in that: described ladle seat (8) is the hollow structure of inner hollow and upper opening, the upper opening of described ladle seat (8) is connected with the sealed bottom of ladle (10), the sidewall of described ladle seat (8) offers safe bleed-out outlet, in described safe bleed-out outlet, be provided with the lid (9) that is easy to be melted by molten steel, a side of described ladle seat (8) is provided with described safe bleed-out and exports corresponding molten steel splendid attire dish (23).
6. integrated ladle refining unit according to claim 5, is characterized in that: comprise for ladle (10) and ladle seat (8) being vacuumized to the vacuum extractor (7) of processing, described vacuum extractor (7) comprises the first valve tube (7-1), the second valve tube (7-2), the 3rd valve tube (7-3) and the 4th valve tube (7-4), described the first valve tube (7-1) one end is connected with vacuum pump, described the second valve tube (7-2) is connected with the first valve tube (7-1), the second steel ladle cover (1) is stretched in one end of described the 3rd valve tube (7-3), the other end of described the 3rd valve tube (7-3) is communicated with or disconnects with the second valve tube (7-2) under the drive of the second rotating mechanism (5), described the 3rd valve tube (7-3) is made by corrugated expansion joint, one end of described the 4th valve tube (7-4) is connected with the first valve tube (7-1), and the other end of described the 4th valve tube (7-4) stretches into ladle seat (8) inside.
7. integrated ladle refining unit according to claim 1, it is characterized in that: on described the second steel ladle cover (1), be provided with and stretch into the second steel ladle cover (1) inner oxygen rifle (2) and oxygen lance lifting device (3), described oxygen lance lifting device (3) comprises the guidepost (3-2) being vertically arranged on the second steel ladle cover (1) and is arranged on the sliding support (3-1) on guidepost (3-2), and the oxygen lance lifting driving mechanism for driving sliding support (3-1) to move up and down along guidepost (3-2), described oxygen rifle (2) is arranged on sliding support (3-1).
8. integrated ladle refining unit according to claim 1, it is characterized in that: on described the first rotating mechanism (11), be provided with electrode (15) and electrode lifting device (16) for stretching into the first steel ladle cover (6), described electrode lifting device (16) comprises that, for the transverse arm (16-1) of holding electrode (15) with for the fixing transverse arm pillar stiffener (16-2) of transverse arm (16-1), described transverse arm pillar stiffener (16-2) below is provided with the rise fall of electrodes driving mechanism for driving transverse arm pillar stiffener (16-2) to move up and down along the first rotating mechanism (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320789200.0U CN203582895U (en) | 2013-11-30 | 2013-11-30 | Integrated ladle refining equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320789200.0U CN203582895U (en) | 2013-11-30 | 2013-11-30 | Integrated ladle refining equipment |
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| Publication Number | Publication Date |
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| CN203582895U true CN203582895U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320789200.0U Expired - Lifetime CN203582895U (en) | 2013-11-30 | 2013-11-30 | Integrated ladle refining equipment |
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| CN (1) | CN203582895U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589823A (en) * | 2013-11-30 | 2014-02-19 | 西安新达炉业工程有限责任公司 | Integrated ladle refining equipment and steel-making method using the same |
| CN107904361A (en) * | 2018-01-05 | 2018-04-13 | 东台市恒泰特钢厂 | A kind of vacuum degassing furnace of convenient charging non-overflow |
| CN108411069A (en) * | 2018-04-28 | 2018-08-17 | 共享铸钢有限公司 | A kind of VOD stoves water cooling leak automatic alarm control system and control method |
| CN109207668A (en) * | 2018-10-17 | 2019-01-15 | 中冶陕压重工设备有限公司 | One dual-purpose LF refining seat bag apparatus |
| CN110747317A (en) * | 2019-11-14 | 2020-02-04 | 泰戈精炼(北京)工程技术有限公司 | Ladle type vacuum refining furnace |
-
2013
- 2013-11-30 CN CN201320789200.0U patent/CN203582895U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589823A (en) * | 2013-11-30 | 2014-02-19 | 西安新达炉业工程有限责任公司 | Integrated ladle refining equipment and steel-making method using the same |
| CN103589823B (en) * | 2013-11-30 | 2015-08-05 | 西安新达炉业工程有限责任公司 | Integration ladle refining equipment and method for making steel |
| CN107904361A (en) * | 2018-01-05 | 2018-04-13 | 东台市恒泰特钢厂 | A kind of vacuum degassing furnace of convenient charging non-overflow |
| CN108411069A (en) * | 2018-04-28 | 2018-08-17 | 共享铸钢有限公司 | A kind of VOD stoves water cooling leak automatic alarm control system and control method |
| CN109207668A (en) * | 2018-10-17 | 2019-01-15 | 中冶陕压重工设备有限公司 | One dual-purpose LF refining seat bag apparatus |
| CN110747317A (en) * | 2019-11-14 | 2020-02-04 | 泰戈精炼(北京)工程技术有限公司 | Ladle type vacuum refining furnace |
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Granted publication date: 20140507 |