CN203007443U - Bimetal aluminum suction pipe - Google Patents

Abstract

The utility model relates to a bimetallic aluminum suction tube, which is composed of upper and lower parts connected as a whole, the upper part is a common aluminum suction tube (1), and the lower part is a heat-resistant and corrosion-resistant material tube (2); the utility model Combining the low price of ordinary aluminum suction tubes with the excellent performance of corrosion-resistant and heat-resistant materials can effectively prolong the service life of aluminum suction tubes. At the same time, its manufacturing process is simple and the material cost is low. Therefore, the bimetallic aluminum suction tube has Great value for money.

Description

A bimetal suction aluminum tube

technical field

The utility model relates to an aluminum suction pipe used in the field of aluminum electrolysis, in particular to a bimetallic aluminum suction pipe.

Background technique

In recent years, my country's aluminum industry has developed rapidly, and the output of electrolytic aluminum ranks first in the world. Aluminum production technology has reached or approached the world's advanced level in many aspects, especially large-scale prebaked anode electrolytic cells have been widely used, and the level of aluminum smelting has improved significantly Great improvement. The ladle is an important equipment in the production process of electrolytic aluminum. It mainly undertakes the task of sucking out and transferring the high-temperature aluminum liquid from the electrolytic cell. The aluminum suction tube is an indispensable and important structure for various types of ladles (including open ladles and vacuum ladles). When working, the aluminum suction tube is inserted into the aluminum liquid in the electrolytic aluminum tank, and the aluminum water is sucked into the ladle by using the siphon principle. The temperature of aluminum water is as high as 1300~1400 ° C, and there are electrolyte fluorides. This requires the material of the aluminum suction tube to be high temperature resistant to 1400°C, and to resist oxidation at a high temperature of 1400°C.

The lower part of the aluminum suction tube is immersed in high-temperature aluminum liquid, and the working environment is extremely harsh. Problems such as oxidation, high-temperature corrosion, and electrolyte corrosion of the aluminum suction tube are likely to cause pitting, perforation, and dissolution of the aluminum suction tube, which directly affects the performance of the aluminum suction tube. service life.

Many aluminum electrolysis workers and research experts have studied and improved the life extension behavior of aluminum suction tubes, but there are not many published results. The published patent "Graphite Aluminum Suction Sleeve" (200920319079.9) is composed of graphite sleeve, side wall hole and aluminum suction tube, which mainly solves the problem of disturbance of the aluminum liquid layer and prevents the aluminum suction tube itself from being corroded by the aluminum liquid. The effect of other problems is not particularly obvious. Recently, some manufacturers have used graphite as a material to make an integral graphite anti-oxidation aluminum suction tube. Although the graphite aluminum suction tube has excellent oxidation resistance, corrosion resistance and thermal shock resistance, the cost is too high and it is extremely difficult to promote.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a long-life aluminum suction pipe with high temperature resistance, corrosion resistance and high cost performance.

The concrete technical scheme of the utility model is as follows:

A bimetallic aluminum suction tube is composed of upper and lower parts connected as one, the upper part is a common aluminum suction tube (1), and the lower part is a heat-resistant and corrosion-resistant material tube (2).

As a preference:

The material of the common aluminum suction pipe is carbon steel or low alloy steel.

The heat-resistant and corrosion-resistant material is steel-bonded hard alloy or high-alloy steel.

The ordinary aluminum suction pipe (1) and the heat-resistant and corrosion-resistant material pipe (2) are connected and formed by extrusion molding, welding or casting transition process.

The ordinary aluminum suction pipe (1) and the heat-resistant and corrosion-resistant material pipe (2) are connected in a convex-concave manner.

The length of the heat-resistant and corrosion-resistant material pipe is greater than the height of the electrolytic cell.

The processing method of the above-mentioned bimetallic aluminum suction tube is:

1. Utilize existing technology to produce ordinary aluminum suction tube as the upper part of bimetallic aluminum suction tube.

2. According to the specifications and dimensions of the aluminum electrolytic cell, use heat-resistant and corrosion-resistant materials to make heat-resistant and corrosion-resistant material tubes as the lower part of the bimetallic aluminum suction tube.

3. The ordinary aluminum suction pipe and the heat-resistant and corrosion-resistant material pipe are connected and formed by extrusion molding, welding or casting transition process.

In the above method, in order to increase the connection strength, the two kinds of pipes in steps 1 and 2 can be processed with convex-concave tables according to the design drawing, respectively, and the two kinds of pipes in steps 1 and 2 can be processed with convex-concave tables respectively according to the design drawings. The number of convex-concave tables can be Adjust according to the actual situation.

The utility model combines the low price of carbon steel with the excellent performance of corrosion-resistant and heat-resistant materials, and adopts extrusion molding, welding or casting transition technology for connection, which can not only effectively prolong the service life of the aluminum suction pipe, but also its The manufacturing process is simple and the material cost is low, so the novel bimetallic aluminum suction tube has high cost performance.

Description of drawings

Fig. 1 shows the axial sectional view of the bimetallic aluminum suction tube referred to in embodiment 1.

In the figure (1) is a carbon steel pipe, (2) a steel-bonded hard alloy pipe.

Fig. 2 is an axial sectional view of the bimetallic aluminum suction tube referred to in embodiment 2.

In the figure (1) is low alloy steel pipe, (2) high alloy steel pipe.

Detailed ways

In order to deepen the understanding of the utility model, the utility model will be further described below in conjunction with the embodiments and accompanying drawings. The embodiment is only used to explain the utility model, and does not constitute a limitation to the protection scope of the utility model.

Example 1

As shown in Figure 1, it is a specific embodiment of a bimetallic composite pipe of the present invention. The bimetallic composite pipe is formed by a carbon steel pipe and a steel-bonded hard alloy pipe through a casting transition process or a welding connection.

This embodiment combines the low price of carbon steel with the excellent properties of corrosion resistance and heat resistance of steel-bonded hard alloy, which can effectively prolong the service life of the aluminum suction tube. At the same time, its manufacturing process is simple and the cost of materials is low. Therefore, this embodiment The new bimetal suction aluminum tube has a high cost performance.

Example 2

The low-alloy steel pipe (1) and the high-alloy steel pipe (2) are respectively subjected to convex-convex processing according to the design drawing, and the low-alloy steel pipe (1) and the high-alloy steel pipe (2) are connected and formed by extrusion molding.

as shown in picture 2.

Claims (6)

1. A bimetallic aluminum suction tube, characterized in that: it consists of upper and lower parts connected as one, the upper part is an ordinary aluminum suction tube (1), and the lower part is a heat-resistant and corrosion-resistant material tube (2). 2. The bimetallic aluminum suction tube according to claim 1, characterized in that: the material of the ordinary aluminum suction tube is carbon steel or low alloy steel. 3. The bimetal suction aluminum tube according to claim 1, characterized in that: the heat-resistant and corrosion-resistant material is steel-bonded hard alloy or other high-alloy steel. 4. The bimetallic aluminum suction pipe according to claim 1, 2 or 3, characterized in that: the ordinary aluminum suction pipe (1) and the heat-resistant and corrosion-resistant material pipe (2) are formed by extrusion, welding or Melting and casting transition process connection molding. 5. The bimetallic aluminum suction tube according to claim 1, 2 or 3, characterized in that: the ordinary aluminum suction tube (1) and the heat-resistant and corrosion-resistant material tube (2) are connected in a convex-concave manner. 6. The bimetallic aluminum suction tube according to claim 1, 2 or 3, characterized in that: the length of the heat-resistant and corrosion-resistant material tube is greater than the height of the electrolytic cell.

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