JPH0329295Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a continuous firing furnace for carbon molded products.

A lead hammer furnace is usually used to continuously fire carbon molded bodies such as electrodes. A reed hammer furnace consists of a single firing furnace divided into a plurality of chambers using cassette bricks connected in series through a flue.

To fire a carbon molded product in a lead hammer furnace, the carbon molded product is placed in a single firing furnace of the lead hammer furnace, fired from a low temperature to a high temperature, and then slowly cooled.

In order to rationalize the heat energy consumed in this firing, multiple single firing furnaces are connected or separated from the flue and combined in series in a sea lease.
Exhaust gas flows from one single firing furnace to the adjacent single firing furnace, and after a certain period of time, the highest temperature single firing furnace where the carbon compact was fired is separated and replaced with a new single firing furnace. was added to the above-mentioned sea lease, and the exhaust gas was passed through as a new sea lease as described above, and then fired in the manner described above.

However, when firing a carbon compact in a conventional lead hammer furnace, the pitch gas generated when the carbon compact is fired into a carbon fired product sometimes ignites, and the subsequent single firing furnace ignites, resulting in the Since the carbon fired product is not fired according to the designed temperature increase curve, the desired quality may not be achieved in some cases.

An object of the present invention is to provide a continuous firing furnace for carbon compacts that can be easily extinguished if the single firing furnace fails to ignite.

Another object of the present invention is to provide a continuous firing furnace for carbon molded articles, which is capable of firing carbon molded articles with a temperature rise curve suitable to the size of the fired product.

Next, one embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

The continuous firing furnace 1 for carbon compacts is divided into single firing furnaces 1B, 2B, 3B, 4B... by inter-furnace flues and connecting flues.
are connected in series, surrounded by sand 3, provided with an exhaust flue, and further fixed with a concrete wall 4.

Single firing furnace 1B, 2B... is cassette brick 1
The carbon molded product 12 is divided into several chambers by 1.
It is assembled into a chamber 13 that accommodates. 14 is a furnace side wall of a single firing furnace, and 15 is an inter-furnace wall that separates and fixes the single firing furnaces. 16 is a furnace lid, and 5 is a damper. When the tar gas generated from the carbon compact in the single firing furnace is ignited, the damper 5 closes the combustion chamber 17 and the exhaust from the high temperature furnace 1B is passed from the bottom flue 1a to the bottom flue 2a to flow into the exhaust flue. As a result, the ignited tar gas is cut off from air and extinguished. After the fire is extinguished, the damper 5 closes the flues 1a and 2a.
erected between. At this time, it is preferable to close it at an appropriate angle as necessary to obtain a desired temperature rise curve.

The bottom flue 1a and the bottom flue 2a are connected so that when the tar gas generated from the carbon compact in the single firing furnace does not ignite, the exhaust gas from the adjacent single firing furnace passes through the single firing furnace. A damper is placed in between.

At this time, the angle of the damper relative to the flue is determined depending on the furnace conditions.

This invention can control the flow of exhaust gas from the adjacent single kiln to the single kiln using the damper, so it can extinguish the ignition of tar gas generated from within the single kiln, thereby reducing the size of carbon products. Since carbon molded products can be fired with a temperature rise curve that matches the above, it is possible to obtain products with excellent properties.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a continuous firing furnace for carbon molded products according to an embodiment of the present invention, Fig. 2 is a plan view of a single kiln in Fig. 1, and Fig. 3 is a -' line in Fig. 2. FIG. 1 ... Continuous firing furnace for carbon molded products, 1B, 2B...
...Single firing furnace, 2...Exhaust flue, 1a, 2a...
The bottom of the corresponding single kiln, 3...sand, 4...
Wall, 5...damper, 11...cassette brick,
12... Carbon molded product, 13... Chamber, 14... Furnace side wall, 15... Furnace wall, 16... Furnace cover, 17... Combustion chamber.

Claims (1)

[Scope of utility model registration request] Divided into multiple rooms by cassette bricks,
In a continuous firing furnace for carbon molded products, in which single firing furnaces each having a combustion chamber are connected in series by a flue, the combustion chamber of each single firing furnace is connected to the bottom flue. A continuous firing furnace for carbon molded products, which is equipped with a damper to block the combustion chamber or bottom flue.