JP2017014604A - Wire feed equipment for molten steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide wire feed equipment for speedy feeding a wire filled with an element to be added to molten steel in an iron sheath to the molten steel, and after the completion of the feeding, immediately moving the molten steel to the following step to streamline molten steel treatment.SOLUTION: In wire feed equipment for molten steel where a wire filled with an element added to molten steel in an iron sheath is fed to molten steel: (i) a feed pipe for feeding the wire and a guide pipe for guiding the wire into the molten steel are provided; (ii-1), upon the addition of the wire to the molten steel, the tip of the feed pipe is connected with the guide pipe, and after adding, the guide pipe is disposed rotatably between a waiting position and a working position for separating the guide pipe from the feed pipe; and also, (ii-2), upon the connection of the guide pipe to the feed pipe, it is made to approach from the downstream side of the feed pipe for connecting them.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a facility for feeding a molten steel with a wire filled in an iron sheath with an element added to the molten steel.

  Conventionally, in order to control the composition and shape of inclusions in steel, a Ca wire (a wire in which a Ca alloy is filled in an iron sheath) is fed to molten steel and Ca is added to the molten steel in the steelmaking stage. (For example, see Patent Documents 1 to 3). Although feeding of Ca wire to molten steel is performed by a feeding device including a wire feeding pipe, various devices have been made from the viewpoint of stable feeding of Ca wire and improvement of Ca yield.

  For example, Patent Document 4 discloses a wire feeding device for a molten steel processing facility for adding a wire such as Ca to molten steel in a molten steel pan, and a swivel frame provided on a work deck so as to be rotatable around a shaft axis. A wire guide pipe lifting mechanism provided on the frame, a movable wire guide pipe that is lifted and lowered by the lifting mechanism, and a rotation driving means for the swivel frame. There is disclosed a wire supply device for a molten steel processing facility that can reciprocate between a lance hole or an electrode hole and a standby position other than these holes.

  However, in the wire supply device of Patent Document 4, since the wire guide pipe lifting mechanism is provided on the revolving frame that can rotate on the work deck, it takes time to move the wire guide pipe between the standby position and the operating position. However, there is a concern that the molten steel treatment does not proceed efficiently.

  Further, Patent Document 5 discloses a container having an upper surface opening for holding a molten metal, a lid that includes an attachment portion and covers the upper surface opening of the container, and is fixed to the attachment portion of the lid. A guide pipe having a pipe hole penetrating through and having a lower end opening facing the molten metal in the container, and a holding portion for holding a wound body wound with a wire mainly composed of an additive, are provided from the wound body. A wire-type additive feeding device comprising: a wire feeder that inserts the removed wire into the pipe hole of the guide pipe and feeds the wire to the molten metal from the lower end opening of the guide pipe. Has been.

  However, in the wire type additive feeding apparatus of Patent Document 5, the wire guide pipe to be added to the molten metal is attached to a liftable hood that covers the ladle that holds the molten metal. It takes time to move between the standby position and the operating position, and there is a concern that the molten steel treatment does not proceed efficiently.

  Further, in the apparatus of Patent Document 5, a certain gap is required between the fixed side guide pipe and the movable side guide pipe. If there is a gap, there is a high risk that the supplied wire will stick or jump out of the gap.

JP-A-56-087636 Japanese Patent Laid-Open No. 08-157935 Japanese Patent Application Laid-Open No. 08-246027 Japanese Patent Laid-Open No. 07-112240 Japanese Patent Application Laid-Open No. 07-126735

  In view of the prior art in which molten steel treatment does not proceed efficiently, the present invention provides a rapid operation for feeding a wire in which an element added to molten steel is filled in an iron sheath (hereinafter also referred to as “wire”) to the molten steel. In addition, the object is to immediately move the molten steel to the next process after the completion of feeding, thereby improving the efficiency of the molten steel treatment, and to provide a wire feeding facility that solves the problem.

  The present inventors diligently studied a method for solving the above problems. As a result, the present inventors can speed up the wire feeding work if the guide pipe for feeding the wire to the molten steel is installed on the work floor so that the wire can be rotated. Immediately, it was found that it was possible to move to the next process and improve the efficiency of the molten steel treatment.

  This invention was made | formed based on the said knowledge, and the summary is as follows.

(1) In a feeding facility for feeding an element added to molten steel to a molten steel with a wire filled in an iron sheath,
(I) a feed pipe for feeding the wire and a guide pipe for guiding the wire to the molten steel;
(Ii-1) When adding the wire to the molten steel, the guide pipe is connected to the tip of the feed pipe, and after the addition is completed, the guide pipe is separated from the feed pipe in order to separate the guide pipe. , Arranged to be rotatable between a standby position and an operating position, and
(Ii-2) A molten steel wire feeding facility characterized in that when the guide pipe is connected to the feed pipe, the guide pipe is connected from the downstream side of the feed pipe.

  (2) The molten steel wire feeding equipment according to (1) above, wherein an inner diameter of an end portion on a feeding side of the guide pipe is larger than an inner diameter of the feeding pipe.

  (3) The molten steel wire feeding facility according to (1) or (2), wherein the guide pipe is rotatable in a plane perpendicular to the opening of the ladle.

  (4) The molten steel wire feeding facility according to any one of (1) to (3), wherein the guide pipe is rotatable in a plane parallel to the opening of the ladle.

  (5) The molten steel wire feeding facility according to any one of (1) to (4), wherein the standby position is within a work floor area.

  According to the present invention, the operation of feeding the wire to the molten steel can be speeded up, and the molten steel can be immediately moved to the next step after the completion of the feeding, so that the molten steel treatment can be made more efficient.

It is a figure which shows the one aspect | mode of the wire feeding equipment of the molten steel of this invention. It is a figure which shows the operation | movement aspect of the wire feeding equipment of the molten steel of this invention.

The molten steel wire feeding equipment of the present invention (hereinafter sometimes referred to as “the present invention equipment”)
In the feeding equipment that feeds the element added to the molten steel, the wire filled in the iron sheath to the molten steel,
A guide pipe connected to the tip of a feed pipe for feeding the wire and feeding the wire to the molten steel is arranged so as to be rotatable between a standby position and an operating position.

  Hereinafter, the facility of the present invention will be described with reference to the drawings.

  FIG. 1 shows one embodiment of the facility of the present invention. A guide pipe 1 for feeding a wire (a wire in which an element added to molten steel is filled in an iron sheath) fed from a feeding pipe 2 supported by a support member 6 attached to a work floor 5 to the molten steel. , Supported by the support arm 3.

  Since the support arm 3 is pivotally supported by the support plate 3a attached to the work bed 5 and the fixed plate 7 fixed to the wall 9a of the control chamber 9 by the shaft 3b, the guide pipe 1 is connected to the shaft 3b. Can be rotated in a plane perpendicular to the opening of the ladle 10.

  The support member 8a horizontally attached to the stationary platen 8 fixed to the wall 9a of the control chamber 9 is provided with a telescopic mechanism 4 so as to be rotatable, and one end of the telescopic mechanism 4 is a central portion of the support arm 3. It is attached to be able to rotate. Therefore, it is possible to rotate the guide pipe 1 between the operating position A and the standby position B in a plane perpendicular to the opening of the ladle 10 by expanding and contracting the expansion and contraction mechanism 4.

  The inner diameter of the guide pipe 1 may be substantially the same as the inner diameter of the feed pipe 2, but the inner diameter (D) of the end portion on the feed side of the guide pipe 1 is larger than the inner diameter (d) of the feed pipe 2 (D > D).

  When D> d, the expansion / contraction mechanism 4 is extended, and when the guide pipe 1 is connected from the downstream side of the feed pipe 2, the connection is facilitated, the connection is made tight, and there is no gap. Alternatively, by connecting the guide pipe 1 so that the end of the feed pipe 2 enters the guide pipe 1, the wire 13 does not protrude from the guide pipe 1 when the wire 13 enters the guide pipe 1 from the feed pipe 2. It becomes possible to.

  The upper limit of D> d is not particularly limited to a specific range. What is necessary is just to design suitably in the range which can ensure the smooth feeding which does not stick to a guide pipe, and does not interfere with another apparatus and apparatus. In addition, according to the operation results, D = (over 1.0 to 3.0) · d is preferable.

  In FIG. 1, the guide pipe 1 is rotated between the operating position A and the standby position B in a plane perpendicular to the opening of the ladle 10, and is connected from the downstream side of the feed pipe 2. As long as it is possible to connect the guide pipe from the downstream side of the feed pipe easily and tightly, the guide pipe can be rotated around an axis perpendicular to the ladle opening. In other words, the tip of the guide pipe may be provided so as to be rotatable in a plane parallel to the opening of the ladle.

  As described above, the guide pipe 1 is connected to the feeding pipe 2 at the operating position A, inherits the wire 13 fed through the feeding pipe 2 from the wire feeding device (not shown), and the ladle 10 The inner slag 12 is penetrated and fed into the molten steel 11 obliquely.

  Here, the operation | movement aspect of this invention installation is shown in FIG. For example, while the degassing device 14 is immersed in the molten steel 11 in the ladle 10 on the ladle table 10a to the immersion position a and degassing, the expansion / contraction mechanism 4 is degenerated, and the guide pipe 1 is Wait at the standby position B.

  Since the standby position B is within the area of the work floor, the guide pipe 1 does not interfere with the movement of the degassing device from the standby position 14b to the immersion position 14a, and does not interfere with other equipment / devices. The standby position B is provided beyond the area of the work floor as long as the guide pipe 1 does not interfere with the movement of the degassing apparatus from the standby position 14b to the immersion position 14a and does not interfere with other equipment / devices. May be.

  After the degassing process is completed, the degassing device is pulled up to the standby position 14b, and at the same time, the telescopic mechanism 4 is extended to push the guide pipe 1 to the operating position A and connect to the feed pipe 2. After the connection, the wire is fed from the wire feeding device (not shown) through the feeding pipe 2, and the wire 13 is fed from the guide pipe 1 through the slag 12 in the ladle 10 into the molten steel 11. .

  When the wire feeding is finished, the telescopic mechanism 4 is retracted, and the guide pipe 1 stands by at the standby position B. As described above, since the standby position B is within the area of the work floor 5, the guide pipe 1 does not prevent the ladle 10 from moving to the next process.

  As mentioned above, based on FIG.1 and FIG.2, although the guide pipe demonstrated the aspect which can rotate within the surface perpendicular | vertical to the opening of a ladle, the stand-by position of the guide pipe connected with a supply pipe is set in the area of a work floor. As long as the guide pipe does not hinder the movement of the ladle and other devices, the rotation surface of the guide pipe is not limited to a plane perpendicular to the opening of the ladle, depending on the arrangement of peripheral devices. It can be selected as appropriate.

  The equipment of the present invention is not limited to the feeding equipment shown in FIGS. 1 and 2. The equipment of the present invention can include various aspects as long as the object of the present invention apparatus is achieved without departing from the gist of the equipment of the present invention.

  As described above, according to the present invention, the operation of feeding the wire to the molten steel can be speeded up, and the molten steel can be immediately moved to the next process after the completion of the feeding, so that the molten steel treatment can be made more efficient. it can. Therefore, the present invention has high applicability in the steel industry.

DESCRIPTION OF SYMBOLS 1 Guide pipe 2 Feeding pipe 3 Support arm 3a Support board 3b Shaft 4 Telescopic mechanism 5 Work floor 6 Support member 7, 8 Fixed board 8a Support member 9 Control chamber 9a Wall 10 Ladle 10a Ladle stand 11 Molten steel 12 Slag 13 Wire 14 Degassing device 14a Immersion position 14b Standby position A Operating position B Standby position

Claims (5)

In the feeding equipment that feeds the element added to the molten steel, the wire filled in the iron sheath to the molten steel,
(I) a feed pipe for feeding the wire and a guide pipe for guiding the wire to the molten steel;
(Ii-1) When adding the wire to the molten steel, the guide pipe is connected to the tip of the feed pipe, and after the addition is completed, the guide pipe is separated from the feed pipe in order to separate the guide pipe. , Arranged to be rotatable between a standby position and an operating position, and
(Ii-2) A molten steel wire feeding facility characterized in that when the guide pipe is connected to the feed pipe, the guide pipe is connected from the downstream side of the feed pipe.   2. The molten steel wire feeding equipment according to claim 1, wherein an inner diameter of an end portion on a feeding side of the guide pipe is larger than an inner diameter of the feeding pipe.   The molten steel wire addition facility according to claim 1, wherein the guide pipe is rotatable in a plane perpendicular to the opening of the ladle.   The molten steel wire feeding equipment according to any one of claims 1 to 3, wherein the guide pipe is rotatable around an axis perpendicular to the opening of the ladle.   The molten steel wire feeding equipment according to any one of claims 1 to 4, wherein the standby position is in a work floor area.

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