JPH04131646U - Lead Bath Patenting Furnace Lead Bath - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to make the installation of a lead bath easy, to ensure a long life, and to prevent oxidation of the lead bath. [Structure] A plurality of radiant tubes (5) are arranged at a predetermined interval in the furnace length direction at the lower part of the side wall of the lead bath (3) of the lead bath patenting furnace, and a wire extraction port (9) is provided on the top surface of the lead bath. 1.) A lead bath for a lead bath patenting furnace, characterized in that a cover (6) is provided in place of the cover (6), and a gas supply pipe (7) is provided for supplying non-oxidizing gas to the space between the cover and the bath surface.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a lead bath for a lead bath patenting furnace.

0002

[Problems to be solved by conventional technology and ideas]

Conventionally, a lead bath for a lead bath patenting furnace is disclosed in, for example, Japanese Patent Application Laid-Open No. 60-26620. As shown in Figure 2 of the publication, the lead bath was heated by downward firing using a direct-fired burner. As a result, the iron shell of the bathtub is oxidized and has a short lifespan, and the bath temperature is also 500-600℃. The limit is ℃. Since the combustion chamber is located below the bathtub, a foundation pit is required. Essential. In addition, since the bath surface is open to the atmosphere, lead oxide is generated and the wire passing through the lead bath is Easy to damage. Furthermore, due to the presence of lead oxide, a lead pump for circulating the lead bath cannot be used, and the bath temperature cannot be balanced. It has problems such as not being able to make it all the same. The present invention is a lead bath patenting method that can solve the above problems with a simple configuration. Aims to provide furnace lead bath.

0003

[Means to solve the problem]

In order to achieve the above object, the present invention has developed a lead bath for a lead bath patenting furnace. Multiple radiant tubes are installed at the bottom of the side wall of the lead bath placed adjacent to the furnace. They are arranged at predetermined intervals in the longitudinal direction, and a wire extraction port is provided on the top surface of the lead bath. A cover is installed to supply non-oxidizing gas to the space between the cover and the bath surface. It is equipped with a supply pipe.

0004

【Example】

Next, one embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is a heating furnace of a lead bath patenting furnace, and 2 is a burner. . Reference numeral 3 denotes a lead bath according to the present invention, which is placed adjacent to the heating furnace 1 and is connected to the bath body 4. A radiant tube (burner) 5 located in the lead bath W at the bottom of the side wall is located in the furnace length direction. They are placed at regular intervals.

[0005] A cover 6 is disposed on the top of the tank body 4, for example, via a sand seal, and covers everything except the extraction port 9 of the wire S. This cover 6 is provided with a gas supply pipe 7 for supplying a non-oxidizing gas such as _N2 into the space R formed between the bath surface of the lead bath W of the tank body 4 and the cover 6. A lead stirring pump 8 for stirring the lead bath W is installed. Note that 10 is a seal box that communicates the heating furnace 1 and the lead bath 3.

[0006] In the lead bath 3, the lead bath W is heated to 6 by direct heating of the radiant tube 5. While maintaining a predetermined temperature of 50 ° C. or less, supplying a non-oxidizing gas into the space R, The lead bath W is stirred by the stirring pump 8 to maintain a uniform temperature. It allows the wire S to pass through.

[0007] Note that when lowering the lead bath temperature due to changes in the processing conditions of the wire S, the radiant By supplying cooling air into tube 5 and using it as a cooling pipe, the lead bath temperature can be controlled. The temperature may be lowered to a predetermined temperature quickly.

[0008]

[Effect of the idea]

As is clear from the above explanation, according to the present invention, the lead bath is a radiator installed in the lead bath. Heating is done using ant tubes, which improves thermal efficiency and shortens heating time compared to conventional methods. Not only can the wire be compressed, but the bath temperature can be heated up to 650℃, and it can be adapted to various processing conditions for wire rods. can be done. Moreover, since the bathtub is not directly heated, the lifespan of the bathtub is greatly improved. Since there is no combustion chamber below the bathtub, there is no need for a foundation pit. It is essential.

[0009] In addition, the bathtub is covered with a cover except for the wire extraction port, and the bath surface and cover are Since non-oxidizing gas is supplied to the space between the parts, the lead bath is not oxidized and the wire rod is not oxidized by lead oxide. In addition to preventing damage, lead consumption can be greatly reduced. Ru. Furthermore, since there is no generation of lead oxide, it is possible to stir the lead bath using a lead pump. It has the effect of making the bath temperature uniform and improving the heat treatment effect of the wire rod. do.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a lead bath of a lead bath patenting furnace according to the present invention.

FIG. 2 is a partial cross-sectional view of FIG. 1;

[Explanation of symbols]

3... Lead bath, 4... Tank body, 5... Radiant tube, 6
…Cover, 7…Gas supply pipe, 9…Extraction port, R…Space, S
...wire rod, W...lead bath.

Claims (1)

[Scope of utility model registration request] Claim 1: A plurality of radiant tubes are arranged at a predetermined interval in the furnace length direction at the lower side wall of a lead bath of a lead bath patenting furnace, and a cover is provided on the top surface of the lead bath except for a wire extraction port. A lead bath for a lead bath patenting furnace, characterized in that a gas supply pipe for supplying non-oxidizing gas is provided in the space between the cover and the bath surface.