JPS624877Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to an improvement of a bucket for storing and preheating raw material scrap charged into an electric furnace.

[Conventional technology]

The raw material scrap charged into the electric furnace is preheated by high-temperature exhaust gas from the electric furnace. For example, as shown in Fig. 1, exhaust gas from an electric furnace a is sent into a combustion chamber d through a smoke collection pipe b and together with secondary air from a secondary air suction port c provided in the smoke collection pipe b. The combustion gases are completely combusted in this chamber, and the hot gases are fed into the preheating chamber f via the supply pipe e. A bucket g for storing raw material scrap is placed in the preheating chamber f, and the top of the bucket g is covered with a hood h. The high temperature gas supplied from pipe e is passed through hood h.
An exhaust fan h is attached to the preheating chamber f, and the high-temperature gas that has passed through the bucket g is sent to the gas cooler m by the exhaust fan h, where it is cooled to below the required temperature. Thereafter, the exhaust gas is sent to the smoke collector p by the second exhaust fan n, and the dust contained in the exhaust gas is removed and the exhaust gas is released into the atmosphere.

[Problem that the invention attempts to solve]

In this case, in order to improve the circulation of high-temperature gas, the bucket can be provided with a large number of circulation holes s on the side surface of the bucket g, as shown in FIG. This prevents the scrap w supplied from the top from leaking from the flow hole s, and the high-temperature gas bypasses and flows out, thereby extending the residence time of the gas and improving heat exchange. It is considered to improve the efficiency of However, with this structure, the hot gas tends to flow along the inner side of the peripheral wall of the bucket g, and therefore the preheating effect at the center of the scrap w is poor.

For this reason, attempts have been made to eliminate the flow hole in the side wall of the bucket bag and provide an opening in the bottom opening (for example, Utility Model Application No. 146900/1983); The scrap is airtightly filled in the vicinity of the bucket, blocking the opening, blocking the flow of high-temperature gas, and flowing out through the gap formed between the opening and closing bottom and the bucket body, causing sufficient preheating to the center of the scrap. There are problems such as not being as effective as expected.

As an improvement to this, a structure has been proposed in which a flow hole is drilled in the lower part of the bottom plate of the openable bottom and a cover is provided inside to cover the flow hole (for example, Japanese Patent Publication No. 56-66685).
The scraps to be stored become entangled with each other and get caught on the cover, which obstructs the opening of the opening/closing bottom and damages the cover, and when the scraps are ejected, they get caught on the cover, making it difficult to take them out smoothly. There is.

In view of the above, an object of the present invention is to provide a bucket bag which facilitates the circulation of supplied high-temperature gas, which does not interfere with the opening and closing of the opening/closing bottom due to the scraps stored therein, and which allows the scraps to be smoothly discharged. do.

[Means for solving problems]

To achieve the above object, the present invention consists of a cylindrical bucket main body and an opening/closing bottom that is attached to the lower part of the main body and can be opened and closed from side to side. It is characterized in that it is formed into a bowl shape, and a lateral gap communicating between the inside and outside is formed between each step member.

[Effect]

The scraps to be stored are supported by each stage member, making it easy to discharge high-temperature gas from the gaps. Furthermore, the stored scraps will not get caught when opening/closing the opening/closing bottom and discharging the scraps.

〔Example〕

The present invention will be specifically explained below based on the embodiment shown in FIGS. 3 and 4.

In the figure, a bucket bag 1 is composed of a cylindrical bag bag main body 2 and an open/close bottom 3 attached to the lower part of the bag bag main body 2.
The hood 4 is fitted into an inverted U-shaped annular fitting groove 5 attached to the lower end of the hood 4, and has a U-shaped outer part formed in the upper part of the preheating chamber 6 for storing sand, water, etc. An annular support flange 9 having a flange 8 fitted into the seal portion 7 is attached.

The opening/closing bottom 3 is formed into a substantially bowl shape by a pair of left and right bottom members 10 and 20, and each bottom member is supported by a support shaft 11 and 2 attached to the bucket main body 2.
The device includes arms 12 and 22 that are supported by the support shaft 1, and are rotated left and right about the support shaft by appropriate means.
The bottom members 10 and 20 have sealing gasket members 13 and 23 attached to their upper portions, respectively, which are brought into airtight contact with the outside of the bucket main body 2, and the respective bottoms have a plurality of step members 14 and 24 vertically spaced apart from each other. death,
and are arranged in a stepped manner to form stepped portions 15, 25,
The left and right step members are connected in the vertical direction by ribs 16 and 26 arranged at intervals on the left and right, and a lateral gap 1 is formed between each step member to communicate with the inside and outside.
7, 27 are formed. Note that 30 is a support frame for the opening/closing bottom 3 provided in the preheating chamber 6.

[Effect of idea]

As described above, according to the present invention, the scrap w stored in the bucket main body 2 is supported separately at the left and right stepped portions of the lower opening/closing bottom 3, and the scrap w is directly placed in the gap between the stepped members serving as the gas passage. Since no dead weight is added to the scrap, no clogging occurs, and therefore, the high-temperature gas supplied from the upper hood 4 can pass through the center of the scrap and easily escape from the stepped portion into the lateral gap. Moreover, the supplied high-temperature gas does not leak from the sides and passes downward throughout the entire scrap area, so that heat exchange can be performed efficiently. Furthermore, since the scraps to be stored are supported by the step members, they will not get caught when the opening/closing bottom is opened, and therefore the opening/closing bottom and the scraps can be smoothly discharged.

[Brief explanation of the drawing]

Fig. 1 is an overall explanatory diagram showing the procedure for preheating scraps, Fig. 2 is a vertical cross-sectional view of a conventional scrap charging bucket, and Fig. 3 is a vertical cross-sectional view showing how the scrap charging bucket of the present invention is installed. FIG. 4 is a sectional view of the bucket bag along line A-A in FIG. 3. 1 is a bucket, 2 is a bucket main body, 3 is an opening/closing bottom, 10 and 20 are bottom members, 13 and 23 are packing members, 14 and 24 are step members, 15 and 25 are stepped portions, and 17 and 27 are gaps.

Claims (1)

[Scope of utility model registration request] It consists of a cylindrical bucket main body and an opening/closing bottom that is attached to the lower part of the main body and can be opened and closed from side to side. A bucket for charging scraps, characterized by forming a horizontal cavity communicating with the inside and outside.