JP2564153Y2 - Lance mechanism of smelting furnace - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a lance mechanism for blowing ore and the like together with oxygen into a smelting furnace such as a smelting furnace or a copper making furnace in a copper smelting process.

[0002]

2. Description of the Related Art Conventionally, in a smelting furnace such as a smelting furnace or a copper smelting furnace in a copper smelting process, powder or granular raw material ore, silica sand, lime, etc. (hereinafter referred to as ore) is added to a molten metal in the furnace. .)
In order to blow together with oxygen-enriched air (hereinafter referred to as oxygen) for accelerating the blowing, a lance mechanism having a double pipe structure composed of an outer pipe 20 and an inner pipe 10 as shown in FIG. 5 is used. Had been.

In this lance mechanism, an outer tube 20 is fixed to an oxygen introduction header 21 by a scroll chuck 30, and is held in communication with the oxygen introduction header 21. Oxygen B is supplied to the oxygen introduction header 21 through the oxygen conduits 22b and 22a, and then guided to the outer tube 20. On the other hand, the inner tube 10 penetrates the oxygen introduction header 21 and is inserted into the outer tube 20. And ore A
Is supplied to an inner pipe header 11 provided on the top of the inner pipe 10 through a raw material conduit 15 formed of a metal pipe.

The oxygen introduction header 21 and the scroll chuck 30 are moved up and down by a lance elevating winch together with the oxygen conduit 22a and the outer tube 20, and are supported by a lance guide 33 by guide rollers 32 so as to be able to move up and down. . At this time, the oxygen conduit 22a is formed so as to protrude and retract from the oxygen conduit 22b as it moves up and down. Further, the inner pipe 10 is suspended independently of the outer pipe 20 by a wire 14 wound around an inner pipe elevating winch (not shown) independently and vertically.

When ore A and oxygen B are blown by this lance mechanism, a lance insertion hole 1a opened in the furnace top 1
The lower ends of the outer tube 20 and the inner tube 10 are inserted into the furnace 3 so as to be at a predetermined height from the molten metal surface 2. Then, ore A and oxygen B are mixed at a predetermined ratio near the inner end of the outer tube 20 and blown into the molten metal.

Since the lower end of the outer tube 20 is gradually melted down by the heat of the furnace 3 and the splash of the molten metal with the blowing, the lower end of the outer tube 20 is gradually raised to maintain a predetermined blowing height from the molten metal surface 2. When the outer tube 20 is lowered until the scroll chuck 30 is close to the furnace top 1, the outer tube 20 is once fixed at the same position, and the outer tube 20 is moved downward. Is removed, the chuck 30 is raised, a new outer tube 20 is added to the upper end of the outer tube 20, and the new outer tube 20 is attached to the chuck 30 and blown.

[0007]

In the above-mentioned conventional lance mechanism, in order to replace the outer tube 20 that has been lost during blowing,
As shown in FIG. 6, the outer tube 20 must be pulled up above the furnace top 1 in order to remove the remaining outer tube 20 from the scroll chuck 30. At the same time, it is necessary to pull up the inner pipe 10 until its tip reaches the vicinity of the scroll chuck 30.
5 needs to be removed from the inner pipe header 11 at the joint 12.

The inner pipe header 11 is located at a considerably high position, and this operation is usually performed at a work place higher than the furnace top 1 or at a high place. In addition, since a plurality of lance mechanisms are generally provided for one furnace,
The replacement of the inner tube header 11 and the raw material conduit 15 was very time-consuming in each case.

The present invention has been made in view of such a problem, and an object of the present invention is to reduce the labor by eliminating the necessity of attaching and detaching the inner pipe and the raw material pipe every time the outer pipe is replaced and supplemented. To provide a lance mechanism that can perform the lance mechanism.

[0010]

According to the present invention, in order to solve the above-mentioned problem, an inner pipe for blowing ore is inserted into an outer pipe for blowing oxygen, and the inner pipe and the outer pipe are independently provided. In a lance mechanism of a smelting furnace having a double pipe structure provided so as to be able to move up and down, a flexible pipe is connected to the inner pipe so as to supply ore to the inner pipe. A plurality of protective plates having wear resistance are attached to the surface at predetermined intervals.

[0011]

The outer tube of the lance mechanism is melted down by blowing, so it is gradually lowered separately from the inner tube, and is raised for replenishment. When the outer pipe is replaced, the inner pipe is also pulled up independently from this, but since the conduit connected to the inner pipe and supplying ore is flexible, the inner pipe is connected to the inner pipe in a state where it is connected. It bends and deforms as the pipe moves up and down. In addition, at the time of ore supply, since a plurality of wear-resistant protective plates are adhered to the inner surface of the pipe of the conduit, there is no wear due to the ore being pumped, and damage to the conduit itself is also prevented. In addition, since these protective plates are adhered at a predetermined interval, the protective plates can move relative to each other, so that flexibility is ensured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a lance mechanism (hereinafter referred to as a lance mechanism) of a smelting furnace according to the present invention will be described with reference to FIGS. Note that the same parts as those of the related art are denoted by the same reference numerals, and description thereof is omitted.

In this lance mechanism, as shown in FIG. 1, an inner tube 1 is used in place of a raw material conduit in a conventional lance mechanism.
2, a flexible conduit 16 for supplying the ore A to the inner tube 10 is connected to the inner tube header 11 and the inner peripheral surface of the conduit 16 has a predetermined shape as shown in FIG. A plurality of wear-resistant protective plates 16a, 16a are attached at intervals.

Although not shown, one end of the conduit 16 is connected to a raw material supply pipe provided from the feed tank to the vicinity of the furnace. The other end is connected to the joint 12 of the inner pipe header 11 as shown in FIG. FIG. 2 shows a cross section of the conduit 16, which is a flexible hose having a multilayer structure in which a reinforcing wire layer 16d and a resin fiber layer 16c such as polyester are formed in a rubber layer 16b. The protective plate 16a adhered to the inner surface is an annular body made of ceramics, each having a slight interval (about 1 m).
m) , the abrasion is extremely small when the ore A is pumped, and the entire hose can be bent. Next, a method of manufacturing the conduit 16 will be described.
I will tell. First, place a plurality of ceramic
Iles (tips) spread vertically and horizontally
Attach to the condition (vulcanized with a salt rubber adhesive).
The ceramic style is 10m long and 10m wide
m, having a thickness of 3 mm. Next, the rubber plate
Is attached to the tile vertically or
Cut along the tile row to the width of 10mm width
It is formed in a shape. Next, the rubber formed in the belt shape
The one with the tile attached to the board, the outer diameter is 76.8m
m around the iron core. This makes the tiles staggered
Array. Then, it is wound around the iron core and
On the tiles attached to the rubber
Then, wrap the vulcanized rubber, and on top of that, a piano wire
Insert a reinforcing wire such as And on the reinforcing wire
Again, wrap the vulcanized rubber again, and wrap it over a
Band). After that, wind it up with the band-shaped cloth.
The product is treated in a vulcanized gas to obtain a vulcanized product.
Then, by extracting the iron core, the inner diameter becomes 76.
An 8 mm of said conduit 16 is manufactured. The conduit 1
The inner diameter of the rubber tube 16b that constitutes 6 is 76.2 mm.
And the length is about 1800 mm.

As shown in FIG. 3, a cable 17 is bound to a part of the conduit 16 and connected to a balancer (not shown) via the cable 17.
A constant upward pulling force is applied. this is,
It is provided to prevent the conduit 16 from sagging downward when the inner pipe 10 is raised and lowered and to reduce the load on the joint 12.
An air balancer or a spring balancer can be used as the balancer according to the weight of the conduit 16.

Further, at the lower position of the inner pipe 10 at the time of ore blowing, a fixing base (fixing means) 40 for holding a part of the conduit 16 in order to suppress vibration and pulsation of the conduit 16 due to ore pumping. Is provided. This fixed base 40
As shown in FIG. 4, the base is attached to the structure side, and a part of the conduit 16 is gripped on the pedestal 42 by a clamp 41 which is opened and closed by a cylinder device (not shown). . The length and arrangement of the conduit 16 are considered so as to be as straight as possible during normal operation, so that damage to the conduit 16 can be prevented.

In this lance mechanism, a guide 35 is provided upright along the inner tube 10 along the side thereof.
5 is a guide roller 3 attached to the inner pipe header 11
4 are engaged. Thus, even when an external force is applied to the inner tube 10 by the flexible conduit 16, the deflection of the inner tube 10 can be regulated and the inner tube 10 can be held at a predetermined position.

When replacing the outer tube 20 in such a lance mechanism to which the conduit 16 is connected, the outer tube 20 is once fixed in the same position as before, and then the scroll chuck 30 is removed and raised. At the same time, the cable 14 is wound up by an inner
Withdraw. In this case, the clamp 4
1 is released, and the grip of the conduit 16 is released.

As shown in FIG. 3, when the inner tube 10 is pulled up, the conduit 16 has flexibility and bends as the inner tube 10 rises. At this time, since the balancer is connected to the conduit 16 via the cable 17, an unreasonable load is not applied to the joint 12 without bending downward. In this way, the scroll chuck 30 is pulled up above the furnace top 1, and the inner pipe 10 is moved to the scroll chuck 30.
After being pulled up to the vicinity, a new outer tube 20 is added to the upper portion of the fixed outer tube 20.

Next, after adding a new outer tube 20,
When the outer tube 20 is inserted into the furnace 3 and the inner tube 10 is lowered to a predetermined position in order to perform blowing again, the conduit 16 becomes the inner tube 1.
Deforms following the fall of 0. As described above, since the conduit 16 follows and deforms when the inner tube 10 is raised or lowered,
Unlike the conventional raw material supply conduit, it is not necessary to perform the desorption operation one by one, so that labor can be saved. In addition, at the lowered position of the inner pipe 10, the conduit 16 is gripped again by the fixing base (fixing means) 40, so that vibration and pulsation at the time of ore A pressure feeding can be suppressed.

On the other hand, when the ore A is supplied to the inner pipe 10 at the time of blowing, the inner surface of the conduit 16 is covered with a protective plate 16a attached to the inner surface.
Is made of a ceramic style and has abrasion resistance, so that it does not wear on the powder or granular ore A to be fed in and prevents the conduit 16 from being damaged. Moreover, the plurality of protection plates 16a are slightly spaced from each other.
(Approximately 1 mm) so that the relative movement between the protection plates 16a is allowed by these distances and the conduit 1
6 is secured. Also, even if ore A (average particle size is about 20 to 30 μm) enters each of the above intervals,
The entered ore A stays there, so that the inner surface of the conduit 16 does not wear.

As described above, each time the outer pipe 20 is replaced, the ore A
It is not necessary to attach / detach the conduit 16 for supplying air, so that labor for the replacement operation can be saved, and the work at a high place conventionally performed can be reduced, so that the safety can be improved. Further, since there is no frequent attachment / detachment work between the inner tube 10 and the raw material conduit as in the related art, damage around the inner tube header 11 can be reduced.

The fixing table (fixing means) 40 of the present embodiment is used.
May be any as long as it holds the conduit 16 at a predetermined position when the inner pipe 10 is lowered to supply the ore A, and can be configured in various modes.

[0024]

[Effects of the Invention] Since the present invention is configured as described above, it is not necessary to attach and detach the inner pipe and the conduit for supplying the ore every time the outer pipe that is melted in the furnace is replaced. In addition to the effect that the blowing operation can be labor-saving, the conventional frequent attaching and detaching operation at a high place can be reduced, so that the safety can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a lance mechanism of a smelting furnace.

FIG. 2 is a sectional view of a conduit used for a lance mechanism.

FIG. 3 is an explanatory view showing a deformation of a conduit when the inner tube is moved up and down.

FIG. 4 is a conceptual diagram of a fixing stand for fixing a conduit.

FIG. 5 is a side view of a conventional lance mechanism at the time of blowing.

FIG. 6 is a side view of a conventional lance mechanism showing a state where an outer tube is pulled up to a furnace top.

[Description of Signs] 1 Furnace top 10 Inner tube 11 Inner tube header 12 Joint 16 Conduit 16a Protective plate 20 Outer tube 21 Oxygen introduction header 22a, 22b Oxygen conduit 30 Scroll chuck 40 Fixing table (fixing means)

Claims (2)

(57) [Scope of request for utility model registration] 1. A smelting furnace having a double pipe structure in which an inner pipe for blowing ore is inserted into an outer pipe for blowing oxygen, and wherein the inner pipe and the outer pipe are independently provided so as to be vertically movable. In the lance mechanism, a flexible conduit is connected to the inner tube to supply ore to the inner tube, and a wear-resistant protective plate is provided on the inner peripheral surface of the inner tube at a predetermined interval. A lance mechanism for the smelting furnace, wherein a plurality of lance mechanisms are attached. 2. The lance mechanism of a smelting furnace according to claim 1, further comprising fixing means for holding said conduit at a predetermined position when said inner pipe is lowered.