CN100368572C - Solid-state start method in T-shape crystallizer using bipolar series electroslag remelting - Google Patents
Solid-state start method in T-shape crystallizer using bipolar series electroslag remelting Download PDFInfo
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- CN100368572C CN100368572C CNB2006100466261A CN200610046626A CN100368572C CN 100368572 C CN100368572 C CN 100368572C CN B2006100466261 A CNB2006100466261 A CN B2006100466261A CN 200610046626 A CN200610046626 A CN 200610046626A CN 100368572 C CN100368572 C CN 100368572C
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Abstract
The present invention relates to a solid state starting method which adopts the electroslag remelting of double electrodes connected in series in a T-shaped crystallizer, which belongs to the technical field of metal electroslag remelting and is applied to the arc-striking slagging process of metal remelting. The method of the present invention comprises the following steps that 1. two slagging electrodes with unequal lengths are respectively welded on the lower end of a first electrode and the lower end of a second electrode, a conductive copper cable is connected to a blank drawing machine of a crystallizer, and a power supply switch is arranged on the conductive copper cable; 2. the power supply switch is switched off, and the two slagging electrodes are driven by the first electrode and the second electrode to simultaneously descend; 3. when the long slagging electrode contacts an arc striking agent, a monopole electric supplying loop is formed, and slag materials are added to start to eliminate slag; 4. when the long slagging electrode is melted to have the same length with the short slagging electrode, the power supply switch is switched off, and a series loop with double electrodes is formed; 5. when the two slagging electrodes are melted, the slagging process is ended, namely that the solid state starting process is ended. The present invention has the advantages of simple operation, good effect, resource saving and high work efficiency.
Description
Technical field
The invention belongs to metal electroslag remelting technique field, particularly a kind of solid-state start method that adopts bipolar series electroslag remelting in T shape crystallizer is applied in the striking slagging process of metal remelting.
Background technology
Steel through electroslag furnace is smelted has the purity height, sulphur content is low, non-metallic inclusion is few, surface of steel ingot is smooth, crystallization even compact, metallographic structure and chemical ingredients advantage of uniform.Therefore, electroslag furnace equipment at home and abroad industry such as iron and steel, machinery obtained widely using.
For the electrode that makes big section can directly obtain light-gauge steel billet after remelting, T shape crystallizer has obtained widespread use in quick remelting of electroslag and Electroslag Continuous Casting Technology.Adopt the method for bipolar series electroslag remelting can avoid technological difficulties such as crystallizer conduction, insulation in the quick remelting of single electrode, the while can be improved the plant capacity factor.Solid-state start method effect in T shape crystallizer of bipolar series electroslag remelting is very bad in the bucket formula crystallizer, changing the slag electrode for two often occurs different in size at the change slag initial stage, cause an electrode and steel billet " to freeze ", problems such as steel billet and dummy bar can not stick together also often occur.Owing to when adopting bipolar series, start comparatively difficulty, so the external liquid state startup method of directly injecting liquid slag that adopts at T shape crystallizer internal solid more.But adopt liquid startup must build a coverization slag equipment in addition, and site operation personnel's labour intensity is improved, make operating procedure become complicated.
Summary of the invention
In order to solve the problem of above-mentioned existence, the object of the present invention is to provide a kind of solid-state start method that in T shape crystallizer, adopts bipolar series electroslag remelting, it is to adopt two change slag electrode slags that are uneven in length, and forms different current supply circuits.
The present invention adopts the solid-state start method of bipolar series electroslag remelting in T shape crystallizer, at first adopt the one pole slag making, adopts the bipolar series slag making then, may further comprise the steps:
1, two change slag electrodes that are uneven in length is welded in the lower end of first electrode and second electrode respectively, the conduction copper cable is connected on the billet withdrawal device of crystallizer, and on the conduction copper cable, power switch is set;
2, closed power switch, first electrode, second electrode band two change slag electrodes and are descended simultaneously;
3, when long change slag electrode contacts with the striking agent, constitute the one pole current supply circuit, add slag charge beginning slag;
4, when long change slag electrode melting to when short change slag electrode length equates, disconnecting power switch, formation bipolar series loop;
5, when two change slag electrodes melted to the greatest extent, slagging process finished, i.e. the solid-state start end of processing.
The described change slag electrode section of electrode lower end that is welded on is less than the electrode section, utilize long change slag electrode to grow when partly carrying out the one pole slag making, should guarantee the slag liquid level greater than the H value, dummy ingot steel billet upper surface was apart from the distance of T shape crystallizer bottom upper port when H was initial.
Characteristics of the present invention are in the solid-state start process, at first adopt the one pole slag making, adopt the bipolar series slag making then, this method is simple to operate, effective, solved two and changed the slag electrodes and often occur different in sizely changing the slag initial stage, caused an electrode and steel billet " to freeze " and steel billet often occurs and dummy bar problem such as can not stick together.
Description of drawings
Fig. 1 is a slag making initial stage structural representation of the present invention;
Fig. 2 is a structural representation in the slagging process of the present invention;
Fig. 3 is a slag making ending phase structural representation of the present invention;
1. electrode I among the figure, 2. electrode II 3. changes slag electrode I, 4. change slag electrode II, 5. crystallizer, 6. molten steel liquid level detection device, 7. striking agent, 8. dummy ingot steel billet, 9. billet withdrawal device, 10. AC power, 11. power switch, 12. molten slag, dummy ingot steel billet upper surface was apart from the distance of T shape crystallizer bottom upper port when 13. steel billets, H were initial.
Embodiment
Specifically describe the present invention below in conjunction with drawings and Examples:
Embodiment 1: device of the present invention: comprise T shape crystallizer: top is the circle of 260mm, the bottom is the square of 90 * 90mm, the quantity of slag is 18kg, the H value is 150mm, two electrodes are section 60 * 120mm steel billet, change the slag electrode length for two and be respectively 500mm, 650mm, cross dimensions is the rectangle of 20 * 60mm, the conduction copper cable, power switch and striking agent, be built-in with 7, two changes of striking agent slag electrode at T shape crystallizer 5 and be welded in the electrode lower end respectively, two electrodes are connected with AC power 10 respectively, the billet withdrawal device 9 of crystallizer 5 belows is connected with AC power 10 by the conduction copper cable, and on the conduction copper cable, power switch 11 being set, T shape crystallizer 5 outsides are equipped with molten steel liquid level detection device 6, are used to detect the liquid steel level signal in the crystallizer 5.
Its solid-state start method at first adopts the one pole slag making, adopts bipolar series slag making simultaneously then, and concrete working process is carried out as follows:
1, two change slag electrode I3 that are uneven in length, change slag electrode II4 are welded in the lower end of electrode I1 and electrode II2 respectively, the conduction copper cable are connected on the billet withdrawal device 9 of crystallizer 5 belows, and on the conduction copper cable, power switch 11 are set, as shown in Figure 1;
2, closed power switch 11, electrode I1, electrode II2 are being with two change slag electrodes to descend simultaneously;
3, when long change slag electrode II4 contacts with striking agent 7, constitute the one pole current supply circuit, be AC power 10, electrode II2, change slag electrode II4, striking agent 7, dummy ingot steel billet 8 and billet withdrawal device 9 formation current supply circuits, add slag charge beginning slag, as shown in Figure 1;
4, when long change slag electrode II4 is melted to and changes slag electrode I3 equal in length, disconnecting power switch 11, constitute the bipolar series loop, promptly AC power 10, electrode I1, change slag electrode I3, molten slag 12, change slag electrode II4, electrode II2 constitute current supply circuit, as shown in Figure 2;
5, molten to the greatest extent the time when changing slag electrode I3 and changing slag electrode II4, enter the normal smelting stage, this moment, AC power 10, electrode I1, molten slag 12, electrode II2 constituted current supply circuit, as shown in Figure 3.
Embodiment 2: device of the present invention: comprise T shape crystallizer: top is the rectangle of 280 * 240mm, the bottom is the square of 160 * 160mm, the quantity of slag is 24kg, the H value is 100mm, two electrodes are section 160 * 80mm steel billet, change the slag electrode length for two and be respectively 300,420mm, cross dimensions is the rectangle of 30 * 120mm, the conduction copper cable, power switch and striking agent, be built-in with 7, two changes of striking agent slag electrode at T shape crystallizer 5 and be welded in the electrode lower end respectively, two electrodes are connected with AC power 10 respectively, the billet withdrawal device 9 of crystallizer 5 belows is connected with AC power 10 by the conduction copper cable, and on the conduction copper cable, power switch 11 being set, T shape crystallizer 5 outsides are equipped with molten steel liquid level detection device 6, are used to detect the liquid steel level signal in the crystallizer 5.
Its solid-state start method at first adopts the one pole slag making, adopts bipolar while slag making then, and concrete working process is carried out as follows:
1, two change slag electrode I3 that are uneven in length, change slag electrode II4 are welded in the lower end of electrode I1 and electrode II2 respectively, the conduction copper cable are connected on the billet withdrawal device 9 of crystallizer 5 belows, and on the conduction copper cable, power switch 11 are set, as shown in Figure 1;
2, closed power switch 11, electrode I1, electrode II2 are being with two change slag electrodes to descend simultaneously;
3, when long change slag electrode II4 contacts with striking agent 7, constitute the one pole current supply circuit, be AC power 10, electrode II2, change slag electrode II4, striking agent 7, dummy ingot steel billet 8 and billet withdrawal device 9 formation current supply circuits, add slag charge beginning slag, as shown in Figure 1;
4, when long change slag electrode II4 is melted to and changes slag electrode I3 equal in length, disconnecting power switch 11, constitute the bipolar series loop, promptly AC power 10, electrode I1, change slag electrode I3, molten slag 12, change slag electrode II4, electrode II2 constitute current supply circuit, as shown in Figure 2;
5, molten to the greatest extent the time when changing slag electrode I3 and changing slag electrode II4, promptly the solid-state start end of processing enters the normal smelting stage, and this moment, AC power 10, electrode I1, molten slag 12, electrode II2 constituted current supply circuit, as shown in Figure 3.
Embodiment 3: device of the present invention: comprise T shape crystallizer: top is the rectangle of 320 * 260mm, the bottom is the square of 200 * 200mm, the quantity of slag is 30kg, the H value is 50mm, two electrodes are section 200 * 100mm steel billet, change the slag electrode length for two and be respectively 200,280mm, cross dimensions is the rectangle of 60 * 150mm, the conduction copper cable, power switch and striking agent, be built-in with 7, two changes of striking agent slag electrode at T shape crystallizer 5 and be welded in the electrode lower end respectively, two electrodes are connected with AC power 10 respectively, the billet withdrawal device 9 of crystallizer 5 belows is connected with AC power 10 by the conduction copper cable, and on the conduction copper cable, power switch 11 being set, T shape crystallizer 5 outsides are equipped with molten steel liquid level detection device 6, are used to detect the liquid steel level signal in the crystallizer 5.
Its solid-state start method at first adopts the one pole slag making, adopts bipolar while slag making then, and concrete working process is carried out as follows:
1, two change slag electrode I3 that are uneven in length, change slag electrode II4 are welded in the lower end of electrode I1 and electrode II2 respectively, the conduction copper cable are connected on the billet withdrawal device 9 of crystallizer 5 belows, and on the conduction copper cable, power switch 11 are set, as shown in Figure 1;
2, closed power switch 11, electrode I1, electrode II2 are being with two change slag electrodes to descend simultaneously;
3, when long change slag electrode II4 contacts with striking agent 7, constitute the one pole current supply circuit, be AC power 10, electrode II2, change slag electrode II4, striking agent 7, dummy ingot steel billet 8 and billet withdrawal device 9 formation current supply circuits, add slag charge beginning slag, as shown in Figure 1;
4, when long change slag electrode II4 is melted to and changes slag electrode I3 equal in length, disconnecting power switch 11, constitute the bipolar series loop, promptly AC power 10, electrode I1, change slag electrode I3, molten slag 12, change slag electrode II4, electrode II2 constitute current supply circuit, as shown in Figure 2;
5, molten to the greatest extent the time when changing slag electrode I3 and changing slag electrode II4, promptly the solid-state start end of processing enters the normal smelting stage, and this moment, AC power 10, electrode I1, molten slag 12, electrode II2 constituted current supply circuit, as shown in Figure 3.
Claims (3)
1. in T shape crystallizer, adopt the solid-state start method of bipolar series electroslag remelting, it is characterized in that at first adopting the one pole slag making, adopt the bipolar series slag making then, may further comprise the steps:
(1), two change slag electrodes that are uneven in length are welded in the lower end of first electrode and second electrode respectively, the conduction copper cable is connected on the billet withdrawal device of crystallizer, and on the conduction copper cable, power switch is set;
(2), closed power switch, first electrode, second electrode band two and are changed the slag electrodes and descend simultaneously;
(3), when long change slag electrode contact with the striking agent, formation one pole current supply circuit, adding slag charge beginning slag;
(4), when long change slag electrode melting to when short change slag electrode length equates, disconnecting power switch, formation bipolar series loop;
(5), to change the slag electrodes moltenly to the greatest extent the time when two, slagging process finishes, i.e. the solid-state start end of processing.
2. the solid-state start method that adopts bipolar series electroslag remelting in T shape crystallizer according to claim 1 is characterized in that the described change slag electrode section of electrode lower end that is welded on is less than the electrode section.
3. the solid-state start method that in T shape crystallizer, adopts bipolar series electroslag remelting according to claim 1, it is characterized in that long change slag electrode grows when partly carrying out the one pole slag making, the slag charge liquid level is greater than the H value, and dummy ingot steel billet upper surface was apart from the distance of T shape crystallizer bottom upper port when H was initial.
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| CNB2006100466261A CN100368572C (en) | 2006-05-22 | 2006-05-22 | Solid-state start method in T-shape crystallizer using bipolar series electroslag remelting |
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| CNB2006100466261A CN100368572C (en) | 2006-05-22 | 2006-05-22 | Solid-state start method in T-shape crystallizer using bipolar series electroslag remelting |
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| CN100368572C true CN100368572C (en) | 2008-02-13 |
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| CN102560134A (en) * | 2010-12-13 | 2012-07-11 | 天工爱和特钢有限公司 | Electroslag remelting furnace |
| CN104439201B (en) * | 2015-01-05 | 2016-05-25 | 东北大学 | A kind of large-scale steel ingot electroslag heat-sealing ejection device and method that is uniformly distributed thermal source |
| CN107876739B (en) * | 2017-12-13 | 2023-06-30 | 沈阳市盛华特种铸造有限公司 | Method for directly forming three-dimensional curved surface blade of water turbine runner through electroslag casting |
| CN108950231B (en) * | 2018-08-13 | 2019-10-25 | 东北大学 | A kind of interior stick outer pipe type bipolar series electroslag remelting device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145563A (en) * | 1976-04-22 | 1979-03-20 | Venjukovsky Armaturny Zavod | Plant for and method of electroslag remelting of metals and alloys |
| US4290474A (en) * | 1979-06-12 | 1981-09-22 | Medovar Boris I | Method and apparatus for electroslag casting of metals |
| CN1037290A (en) * | 1988-03-31 | 1989-11-22 | 布罗肯希尔有限公司 | Electro-slag casting apparatus and method |
| CN1044500A (en) * | 1989-01-25 | 1990-08-08 | 北京科技大学 | A kind of less energy-consumption esr is produced the method for fine crystal ingot |
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- 2006-05-22 CN CNB2006100466261A patent/CN100368572C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145563A (en) * | 1976-04-22 | 1979-03-20 | Venjukovsky Armaturny Zavod | Plant for and method of electroslag remelting of metals and alloys |
| US4290474A (en) * | 1979-06-12 | 1981-09-22 | Medovar Boris I | Method and apparatus for electroslag casting of metals |
| CN1037290A (en) * | 1988-03-31 | 1989-11-22 | 布罗肯希尔有限公司 | Electro-slag casting apparatus and method |
| CN1044500A (en) * | 1989-01-25 | 1990-08-08 | 北京科技大学 | A kind of less energy-consumption esr is produced the method for fine crystal ingot |
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