CN111394540A - CAS furnace wire feeding machine and manufacturing method thereof - Google Patents
CAS furnace wire feeding machine and manufacturing method thereof Download PDFInfo
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- CN111394540A CN111394540A CN202010285053.8A CN202010285053A CN111394540A CN 111394540 A CN111394540 A CN 111394540A CN 202010285053 A CN202010285053 A CN 202010285053A CN 111394540 A CN111394540 A CN 111394540A
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- wire
- wire feeding
- silk thread
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
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Abstract
The invention discloses a CAS furnace wire feeding machine and a manufacturing method thereof, and relates to the technical field of steel smelting equipment. The silk thread enters the silk thread control disc through the silk thread feeding guide pipe, and the silk thread is ensured to react with the oxygen in the slag only by adjusting the feeding speed of the silk thread through the action of the silk thread control disc, so that the aim of deoxidizing the slag is fulfilled.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a CAS furnace wire feeding machine and a manufacturing method thereof.
Background
In the field of metallurgy, the CAS wire feeder behind a converter has the function of smoothly feeding wires to the surface of molten steel slag at a certain wire feeding speed through a wire feeder guide pipe, effectively removing oxygen in the slag and simultaneously not feeding the wires into the molten steel. The traditional RH wire feeder is directly fed from top to bottom perpendicular to the molten steel surface when a wire is fed, so that the wire can be directly fed into the molten steel from top to bottom no matter how the feeding speed is, and the aims of only feeding the wire to the surface of molten steel slag and only removing oxygen in slag and not removing oxygen in the molten steel cannot be fulfilled.
Disclosure of Invention
Aiming at the technical problems, the invention overcomes the defects of the prior art and provides a CAS furnace wire feeding machine which improves the product quality of the working procedure from BOF → RH, solves the problems of stable and quick wire feeding of the CAS furnace behind a converter furnace and ensures the product quality, and ensures that the wire only reacts with oxygen in the slag by adjusting the wire feeding speed so as to achieve the aim of deoxidizing the slag.
In order to solve the technical problems, the invention provides a CAS furnace wire feeding machine which comprises a wire feeding guide pipe and a wire control disc connected below the wire feeding guide pipe, wherein the wire feeding guide pipe is hollow and is provided with a wire guide cavity, the wire control disc is hollow and is provided with a limiting cavity, the limiting cavity is in a round table shape, the top caliber of the limiting cavity is smaller than that of the bottom of the limiting cavity and is communicated with the wire guide cavity, the top of the wire guide cavity is provided with a wire inlet, the bottom of the limiting cavity is provided with a wire outlet, and the wire feeding guide pipe and the wire control disc are both cast.
Furthermore, the device comprises a plurality of standby silk thread control disks, and the bottom calibers of different silk thread control disks are different.
The technical effects are as follows: the invention designs a novel CAS furnace wire feeding machine, which enables wires to enter a wire control disc through a wire feeding guide pipe, ensures that the wires only react with oxygen in furnace slag through the action of the wire control disc and the adjustment of the wire feeding speed, and achieves the aim of deoxidizing the furnace slag.
Another object of the present invention is to provide a method for manufacturing a CAS-type furnace wire feeder, wherein the steps of manufacturing the wire feeding guide tube and the wire control disc include:
s1, manufacturing the split wire feeding guide pipe die and the wire control disc die by adopting magnesium castable;
s2, adding the prepared magnesium castable into water, uniformly stirring, pouring into a mold, keeping the mold for 2-3 days after pouring, then placing the mold in a kiln, baking for 48 hours, naturally cooling to below 80 ℃ after baking, and taking the mold out of the kiln for later use;
s3, before casting, the wire feeding guide pipe and the wire control disc, placing a magnesium mould on a steel bottom plate, and sealing the mould and the bottom plate by using clay made of brine magnesium fire clay;
s4, casting the molten steel for casting into the installed mould, cooling and demoulding;
and S5, polishing the surface of the steel casting, checking the size, and obtaining the finished product of the wire feeding guide pipe and the wire control disc after the steel casting is qualified.
In the manufacturing method of the CAS furnace wire feeding machine, in step S2, the proportion of the added water is 3.5-5.5% of the total volume fraction of the magnesium castable and the water.
In the above manufacturing method of the CAS furnace wire feeder, in step S2, the temperature is raised to 100 ℃ at a constant speed and kept at the 10 th hour for the 1 st hour of baking, the temperature is raised to 150 ℃ at a constant speed and kept at the 22 th hour for the 12 th hour, the temperature is raised to 250 ℃ at a constant speed and kept at the 32 th hour for the 27 th hour, the temperature is raised to 450 ℃ at a constant speed and kept at the 48 th hour for the 40 th hour, and the baking is finished.
In the manufacturing method of the CAS furnace wire feeding machine, in step S4, the manganese content of the molten steel is more than 1.5%, and the molten steel is heated to 1600-1650 ℃.
The invention has the beneficial effects that:
(1) the manufacturing method of the wire feeding machine provided by the invention is characterized in that the wire feeding machine is integrally cast, so that the wire can be smoothly fed into the slag, the deoxidation capability of the slag is improved, the technical problem of deoxidation of the slag surface of molten steel after CAS tapping is successfully solved, the wire feeding machine is stable in use, the wire feeding deoxidation effect of the slag is obvious, and the quality of a smelting product is stabilized;
(2) the wire control disc and the wire feeding guide pipe are both cast by high-strength alloy, have the capabilities of high temperature resistance and deformation resistance, have stable service performance, successfully solve the technical problem of deoxidation of the molten steel slag surface after CAS tapping, and have obvious slag wire feeding deoxidation effect;
(3) in the invention, the silk thread is fed through the silk thread control disc during the thread feeding, thereby solving the problem that the silk thread is gradually fed from the center of the ladle to the periphery and ensuring the uniformity of the feeding of the silk thread of the CAS furnace;
(4) the invention successfully solves the technical problem that the oxygen content in the slag after the tapping of the converter is too high and can not be removed, reduces the condition that the cleanliness of the molten steel is polluted again after the RH vacuum treatment, stabilizes the quality of the product and improves the production efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic view of the die structure of the wire feed guide of the present invention;
FIG. 4 is a schematic view of a mold structure of the yarn control disk of the present invention;
FIG. 5 is a baking curve of the wire feeding guide tube and the wire control disc according to the present invention;
FIG. 6 is a schematic structural view of a steel substrate according to the present invention;
wherein: 1. a ladle; 2. a wire feed conduit; 201. a wire feeding annular cavity; 3. a silk thread guide disc; 301. leading to the annular chamber.
Detailed Description
The CAS furnace wire feeder provided by the embodiment has a structure shown in fig. 1-2, and includes a wire feeding guide pipe 2, a wire guiding chamber 201 is arranged in the hollow of the wire feeding guide pipe 2, and the CAS furnace wire feeder further includes a wire control disc 3 detachably connected below the wire feeding guide pipe 2, a limiting chamber 301 is arranged in the hollow of the wire control disc 3 and communicated with the wire guiding chamber 201, a wire inlet is arranged at the top of the wire guiding chamber 201, and a wire outlet is arranged at the bottom of the limiting chamber 301. The thread control disc 3 and the thread feeding guide pipe 2 are both cast by high-strength alloy, a plurality of standby thread control discs 3 are arranged at the same time, and the bottom calibers of different thread control discs 3 are different. The wire feeding guide pipe and the wire control disc are both cast by adopting a magnesium mould.
The manufacturing method of the wire feeding machine comprises the following steps of:
s1, manufacturing a split type wire feeding guide pipe 2 die and a wire control disc 3 die by adopting magnesium castable, and as shown in figures 3 and 4;
s2, adding water into the prepared magnesium castable, uniformly stirring, pouring into a mold, wherein the proportion of the added water is 3.5-5.5% of the total volume fraction of the magnesium castable and the water; after pouring, keeping the mold for 2-3 days, then putting the mold into a kiln and baking the mold for 48 hours, wherein the baking curve is shown in figure 5, and after baking, naturally cooling the mold to a temperature below 80 ℃ and taking the mold out of the kiln for later use;
s3, before casting, the wire feeding guide pipe 2 and the wire control disc 3, placing a magnesium mould on a steel bottom plate, wherein the steel bottom plate is shown in figure 6, and the mould and the bottom plate are sealed by cement made of brine magnesium fire clay;
s4, casting molten steel for casting into the installed die, wherein the manganese content of the molten steel is more than 1.5%, heating to 1600-1650 ℃, cooling and demoulding;
and S5, polishing the surface of the steel casting, checking the size, and obtaining the finished product of the wire feeding guide pipe 2 and the wire control disc 3 after the steel casting is qualified.
The CAS furnace wire feeder is mainly used for BOF → RH → L F → CCM smelting process, the converter is oxidizing atmosphere, the oxygen content in steel and slag after tapping is higher, the oxygen content in molten steel is extremely low after RH vacuum treatment, if the oxygen in slag is not removed, the oxygen pollutes the molten steel through diffusion reaction, so that the quality of the molten steel is reduced.
The CAS wire feeding machine with the design is arranged on the upper part of the CAS furnace behind the converter furnace, after molten steel is tapped from the converter, a steel ladle is opened to a wire feeding position of the CAS furnace, wires are fed, and other working procedure operations are not influenced when the wire feeding machine is not used. The equipment is simple, the high temperature resistance is realized, the operation of the silk thread is stable, the technical problem that the silk thread is fed into the slag by the CAS furnace after the converter furnace to remove oxygen in the slag is successfully solved, the purity of the molten steel is improved, and the product quality is improved. The guide pipe of the CAS wire feeder of the 800 furnace has no deformation and no falling, the service life is greatly prolonged, and obvious economic benefit and safety benefit are obtained.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (6)
1. A CAS stove wire feeder, includes wire feed pipe (2), wire feed pipe (2) inside cavity is set as wire guide chamber (201), its characterized in that: still including dismantling connect in silk thread control panel (3) of wire feeding pipe (2) below, silk thread control panel (3) inside cavity is established to spacing chamber (301), spacing chamber (301) are round platform form and top bore and are less than the bottom bore, with silk thread chamber (201) intercommunication, silk thread entry is established at silk thread chamber (201) top, establish to silk thread export spacing chamber (301) bottom, wire feeding pipe (2) with silk thread control panel (3) all adopt the magnesium mould casting to form.
2. The CAS furnace wire feeder according to claim 1, wherein: the yarn cutting machine comprises a plurality of standby yarn control discs (3), and the bottom calibers of the yarn control discs (3) are different.
3. A method of making a CAS-type furnace wire feeder according to any one of claims 1 to 2, wherein: the manufacturing steps of the wire feeding guide pipe (2) and the wire control disc (3) comprise:
s1, manufacturing a split type wire feeding guide pipe (2) die and a wire control disc (3) die by adopting magnesium castable;
s2, adding the prepared magnesium castable into water, uniformly stirring, pouring into a mold, keeping the mold for 2-3 days after pouring, then placing the mold in a kiln, baking for 48 hours, naturally cooling to below 80 ℃ after baking, and taking the mold out of the kiln for later use;
s3, before the wire feeding guide pipe (2) and the silk thread control disc (3) are cast, a magnesium mould is placed on a steel bottom plate, and the mould and the bottom plate are sealed by daub made of brine magnesium fire clay;
s4, casting the molten steel for casting into the installed mould, cooling and demoulding;
and S5, polishing the surface of the steel casting, checking the size, and obtaining the finished product of the wire feeding guide pipe (2) and the wire control disc (3) after the steel casting is qualified.
4. The manufacturing method of the CAS furnace wire feeding machine as claimed in claim 3, wherein: in the step S2, the proportion of the added water is 3.5-5.5% of the total volume fraction of the magnesium castable and the water.
5. The manufacturing method of the CAS furnace wire feeding machine as claimed in claim 3, wherein: in the step S2, the temperature is raised to 100 ℃ at a constant speed during the 1 st hour of baking and is kept at the 10 th hour, the temperature is raised to 150 ℃ at a constant speed during the 12 th hour and is kept at the 22 th hour, the temperature is raised to 250 ℃ at a constant speed during the 27 th hour and is kept at the 32 th hour, the temperature is raised to 450 ℃ at a constant speed during the 40 th hour and is kept at the 48 th hour, and the baking is finished.
6. The manufacturing method of the CAS furnace wire feeding machine as claimed in claim 3, wherein: in the step S4, the manganese content of the molten steel is more than 1.5%, and the molten steel is heated to 1600-1650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010285053.8A CN111394540A (en) | 2020-04-13 | 2020-04-13 | CAS furnace wire feeding machine and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010285053.8A CN111394540A (en) | 2020-04-13 | 2020-04-13 | CAS furnace wire feeding machine and manufacturing method thereof |
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| CN111394540A true CN111394540A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010285053.8A Pending CN111394540A (en) | 2020-04-13 | 2020-04-13 | CAS furnace wire feeding machine and manufacturing method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337377A (en) * | 2011-08-23 | 2012-02-01 | 莱芜钢铁集团有限公司 | Molten steel wire feeding device and wire feeding method |
| CN108085462A (en) * | 2017-11-29 | 2018-05-29 | 南京钢铁股份有限公司 | A kind of RH wire feeders conduit and preparation method thereof |
| CN110184415A (en) * | 2019-05-29 | 2019-08-30 | 钢铁研究总院 | A kind of ladle refining Yarn feeding device and line feeding method |
-
2020
- 2020-04-13 CN CN202010285053.8A patent/CN111394540A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337377A (en) * | 2011-08-23 | 2012-02-01 | 莱芜钢铁集团有限公司 | Molten steel wire feeding device and wire feeding method |
| CN108085462A (en) * | 2017-11-29 | 2018-05-29 | 南京钢铁股份有限公司 | A kind of RH wire feeders conduit and preparation method thereof |
| CN110184415A (en) * | 2019-05-29 | 2019-08-30 | 钢铁研究总院 | A kind of ladle refining Yarn feeding device and line feeding method |
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Application publication date: 20200710 |