JPS631189Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is designed to preheat the scrap by using the heat of the exhaust gas from the arc furnace.The scrap preheating tank is installed next to the arc furnace so that it can only be rotated. This invention relates to an apparatus for charging preheated scrap into an arc furnace, which allows uniform charging of scrap into the arc furnace.

Due to recent energy issues, it has become popular to preheat scrap using high-temperature exhaust gas from an arc furnace, and an example has been proposed in which a scrap preheating tank is installed inside an enclosure surrounding the arc furnace.

Now, to give an example, as shown in FIG. is mounted so that the scrap preheating tank c can be moved in and out of the enclosure by the cart b, and the scrap preheating tank c can be moved by the cart b to a position above the arc furnace d, so that the scrap preheating tank c can be moved to a position above the arc furnace d. When charging scrap into the arc furnace d, move the scrap preheating tank c placed on the cart b to the upper part of the arc furnace d, and
There is a type in which the bottom cover e is opened and the scrap is allowed to fall and be loaded.

However, in the method in which the scrap preheating tank c is moved above the arc furnace d and the scrap is charged into the arc furnace, the scrap rises from the top of the arc furnace, and the furnace cover must be moved laterally after charging. At present, when attempting to attach the scrap to an arc furnace, the bulging of the scrap makes it impossible to attach the furnace lid, which is causing a hindrance to the work. In addition, since a preheating tank is installed on the mobile cart,
The preheating tank is used for receiving scraps, preheating scraps,
It has to be moved to three different locations for scrap charging, a large space is required for the installation of the preheating tank, and the operating time schedule becomes longer, among other problems.

The present invention aims to solve this problem by installing a scrap preheating tank near the arc furnace so that preheated scrap can be uniformly charged into the arc furnace without moving the preheating tank.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 shows the state during scrap preheating. The arc furnace 2 and the scrap preheating tank 3 are installed inside the enclosure 1, and the inside of the furnace lid 4 of the arc furnace 2 and the upper lid 5 of the scrap preheating tank 3 are The exhaust gas dust 7 is connected to the scrap preheating tank 3 through an exhaust gas introduction pipe 6, and the high-temperature exhaust gas from inside the arc furnace 2 is sucked into the scrap preheating tank 3 through the exhaust gas introduction pipe 6 by the suction action of the fan 8. In this structure, the scrap preheating tank 3 is not moved to a position above the arc furnace 2, and the preheated scrap is transferred to the arc furnace. 2
It is designed so that it can be charged inside.

That is, a gate is provided at the bottom of the scrap preheating tank 3 so as to be freely opened and closed, the scrap preheating tank 3 is supported on a freely rotatable support device 10, and a charging conveyor 11 positioned below the scrap preheating tank 3 is connected to the scrap preheating tank 3 via two links 12, 13 on each side so as to be capable of parallelogram motion, the links 12 are rotated by the expansion and contraction action of a cylinder 14, and the scrap preheating tank 3 and the conveyor 1 are connected to each other by the rotation of the support device 10.
The enclosure 1 is provided with a conveyor 15 on one side thereof for feeding scraps to be preheated from outside the enclosure 1 into the scrap preheating tank 3. The conveyor 15 is supported by the enclosure 1 through links 16 and 17, and the conveyor 15 is displaceable in the inward and outward directions of the enclosure 1 by rotating the link 16 with a cylinder 18. The scraps received outside the enclosure 1 are fed into the scrap preheating tank 3 by the movement of the conveyor 15.
The exhaust gas dust 7 is divided midway so that it separates when the scrap preheating tank 3 rotates.

With the above configuration, during scrap preheating, the arc furnace lid 4 and scrap preheating tank upper lid 5 are attached as shown in FIG. It is placed at a position away from the furnace 2, and the exhaust gas dust 7 is communicated with a fan 8.

After preheating the scrap, when charging the preheated scrap into the arc furnace 2, the furnace lid 4 and the exhaust gas introduction pipe 6 are rotated to a position where there is no problem in loading the scrap, as shown in Figure 2. I'll keep it on standby. Next, the scrap preheating tank 3 is rotated together with the conveyor 11 so that the tip of the conveyor 11 is positioned above the arc furnace 2.

In the above state, the gate 9 at the bottom of the scrap preheating tank 3 is opened and at the same time the conveyor 11 is driven.
As a result, the conveyor 11 is transferred from the scrap preheating tank 3 to the conveyor 11.
The scrap that has fallen above can be charged into the arc furnace 2. At this time, the conveyor 11 is moved forward via the links 12 and 13, and the conveyor 11 is moved forward by rotating the scrap preheating tank 3.
Scrap charging is carried out simultaneously or individually in combination with the rotational movement of the screw. By combining the various movements of the conveyor 11, it is possible to make the distribution of scrap charging into the arc furnace 2 uniform, and it is possible to prevent the scrap from rising from the top of the furnace. 4 can also be easily installed.

Further, when loading the scraps into the scrap preheating tank 3, the upper lid 5 is rotated and the scraps are inputted by the conveyor 15.

It should be noted that the preheated scrap charging device of the present invention is not limited to the above-mentioned embodiment, and the forward and backward movement of the conveyors 11 and 15 may be performed by means other than the link, and other gist of the present invention may be realized. It goes without saying that changes can be made and implemented without departing from the above.

As described above, according to the apparatus for charging preheated scrap into an arc furnace of the present invention, the following effects can be achieved.

(i) Since the scrap preheating tank remains located in one place, the installation area is small.

(ii) The time schedule for scrap receiving, scrap preheating, and scrap charging can be shortened.

(iii) The charging distribution of scrap into the arc furnace can be made uniform, scrap can be prevented from rising from the top of the furnace, and the furnace cover can be easily attached.

[Brief explanation of the drawing]

Fig. 1 is a diagram of a conventional example, Fig. 2 is a side view showing a state during scrap preheating of an arc furnace equipment that employs the device for charging preheated scrap into an arc furnace of the present invention, and Fig. 3 is a diagram of an arc furnace. FIG. 4 is a side view of FIG. 3; FIG. 2... Arc furnace, 3... Scrap preheating tank, 4
... Furnace lid, 5 ... Upper lid, 6 ... Exhaust gas introduction pipe, 8
...fan, 9...gate, 10...support device,
11... Charging conveyor, 12, 13... Link, 14... Cylinder.

Claims (1)

[Scope of utility model registration request] A scrap preheating tank is supported by a rotatable support device near the arc furnace, and a scrap charging conveyor positioned below the scrap preheating tank is movably moved in the longitudinal direction to the scrap preheating tank. A device for charging preheated scrap into an arc furnace, characterized in that the conveyor is supported so that it can rotate together with the scrap preheating tank.