A heat insulation sleeve for the cathode steel rod head of an aluminum electrolytic cell

Abstract

This utility model relates to the field of aluminum electrolysis equipment technology, and in particular to a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, comprising: a main support part and side support parts; the main support part is a rectangular plate structure; the side support parts are rectangular plate structures; one end of the side support part in the width direction is set on one end of the main support part in the width direction; one end of the side support part in the length direction is flush with one end of the main support part in the length direction; there are two side support parts; the two side support parts are symmetrically arranged at both ends of the main support part in the width direction; the side support parts are perpendicular to the main support part; the two side support parts and the main support part are constructed into a U-shaped groove; the length of the main support part is twice the length of the side support parts; a heat insulation layer one is provided on the inner side of the main support part; a heat insulation layer two is provided on the inner side of the side support parts. This utility model improves the convenience of installation and disassembly; facilitates testing the current distribution and temperature of the cathode steel rod; and is low in cost and simple to maintain.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum electrolysis equipment, and in particular to a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell. Background Technology

[0002] In aluminum electrolysis, the principle of molten salt electrochemistry is employed, using a fluoride system (such as cryolite) as the molten salt, with electrolysis temperatures reaching approximately 950 degrees Celsius. Since the energy utilization rate is only about 50%, the electrolytic cell dissipates heat through flue gas, the upper part, and the cell shell to maintain energy balance. Under normal circumstances, the heat dissipation of each part of the electrolytic cell is relatively constant during operation, with each part having an appropriate heat dissipation ratio. Due to advancements in energy-saving technologies for electrolytic cells in recent years, phosphorus-iron cast cathodes are currently a widely used energy-saving technology. These cathodes have larger cross-sectional areas, leading to increased heat dissipation area and thus increased heat dissipation; simultaneously, the heat dissipation ratio of the cathode is also increased. On the one hand, the energy dissipated in this part needs to be compensated by increasing the cell voltage, which is a waste of energy. On the other hand, the larger the steel rod size, the larger the heat conduction cross-sectional area, and the more significant the heat dissipation. The lower part of the cathode (the area where the carbon block connects to the steel rod) needs to be insulated to maintain a stable temperature field. However, the increase in the size of the steel rod head leads to excessive local heat loss. The cathode carbon block becomes locally overcooled due to the rapid heat dissipation of the steel rod, which in turn leads to thermal stress or uneven current distribution. Therefore, it is necessary to insulate the steel rod head. If the insulation material is directly wrapped around the steel rod head, various fastening devices are required, and installation and disassembly are difficult and costly. Furthermore, it is inconvenient to test the current distribution and temperature of the cathode steel rod. Utility Model Content

[0003] In view of this, the present invention provides a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, the main purpose of which is to improve the convenience of installation and disassembly; facilitate the testing of the current distribution and temperature of the cathode steel rod, and is low in cost and simple to maintain.

[0004] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0005] An embodiment of this utility model provides a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, comprising: a main support part and a side support part;

[0006] The main support section is a rectangular plate structure;

[0007] The side support is a rectangular plate structure; one end of the side support in the width direction is located on the main support in the width direction; one end of the side support in the length direction is flush with one end of the main support in the length direction.

[0008] There are two side support portions; the two side support portions are symmetrically arranged at both ends of the main support portion in the width direction; the side support portions are perpendicular to the main support portion;

[0009] The two side support portions and the main support portion are configured as a U-shaped groove;

[0010] The length of the main support is twice the length of the side support;

[0011] A heat insulation layer is provided on the inner side of the main support part;

[0012] A second heat insulation layer is provided on the inner side of the side support.

[0013] Furthermore, the main support portion and the side support portion are integrally formed.

[0014] Furthermore, the main support and the side support are calcium silicate composite insulation boards.

[0015] Furthermore, the heat insulation layer is an aluminum silicate fiber layer;

[0016] Furthermore, the second heat insulation layer is an aluminum silicate fiber layer.

[0017] Furthermore, one end of the main support portion has a notch.

[0018] By employing the above technical solution, the heat insulation sleeve for the cathode steel rod head of the aluminum electrolytic cell of this utility model has at least the following advantages:

[0019] It can improve the ease of installation and disassembly; facilitate the testing of current distribution and temperature of cathode steel rods; and is low in cost and simple to maintain.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 A schematic diagram of the main cross-section of the insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell provided in this embodiment of the present invention;

[0022] Figure 2 A side cross-sectional schematic diagram of the heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell provided in this embodiment of the present invention;

[0023] Figure 3 This is a top view schematic diagram of an insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, provided as an embodiment of the present invention.

[0024] As shown in the figure:

[0025] 1 is the main support, 2 is the side support, 3 is the first insulation layer, 4 is the second insulation layer, and 5 is the opening. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0027] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention provides a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, comprising: a main support part 1 and a side support part 2; the main support part 1 is a rectangular plate structure; the side support part 2 is a rectangular plate structure; one end of the side support part 2 in the width direction is disposed on one end of the main support part 1 in the width direction; one end of the side support part 2 in the length direction is flush with one end of the main support part 1 in the length direction; there are two side support parts 2; the two side support parts 2 are symmetrically disposed at both ends of the main support part 1 in the width direction; the side support parts 2 are perpendicular to the main support part 1; the two side support parts 2 and the main support part 1 are constructed into a groove with a "U" shaped cross section; the length of the main support part 1 is twice the length of the side support part 2; preferably, the main support part 1 and the side support part 2 are integrally formed; the groove structure can be formed by cutting a single integral plate. Preferably, the main support part 1 and the side support part 2 are calcium silicate composite insulation boards, which combine the advantages of calcium silicate boards themselves with the advantages of composite insulation materials. They have excellent thermal insulation and fire resistance, as well as high strength and good impact resistance.

[0028] The inner side of the main support 1 is provided with a heat insulation layer 3; preferably, the heat insulation layer 3 is an aluminum silicate fiber layer, which has an extremely low thermal conductivity and is a highly efficient heat insulation material.

[0029] A second heat insulation layer 4 is provided on the inner side of the side support 2. Preferably, the second heat insulation layer 4 is an aluminum silicate fiber layer, which has an extremely low thermal conductivity and is a highly efficient heat insulation material. The first heat insulation layer 3 and the second heat insulation layer 4 can be integrally molded materials or spliced ​​together.

[0030] One embodiment of this utility model provides an insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell. During installation, it can be used individually or two sleeves can be joined together. When used individually, one side of the steel rod is exposed, facilitating easy testing at any time, and installation and disassembly are simple and convenient. When two insulation sleeves are joined together, the main support parts 1 of the two sleeves are respectively located on opposite sides of the steel rod; the two insulation sleeves can form a complete enclosure for the steel rod.

[0031] One embodiment of this utility model provides a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, which improves the convenience of installation and disassembly; facilitates testing of the current distribution and temperature of the cathode steel rod; and is low in cost and simple to maintain.

[0032] Preferably, one end of the main support 1 has a notch 5 to facilitate testing of the steel rod when the two insulation sleeves are spliced ​​together to wrap the steel rod.

[0033] To further clarify, while the terms "first," "second," etc., may be used herein to describe various elements, these terms should not limit the elements. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element; these terms are used only to distinguish one element from another. This does not depart from the scope of the exemplary embodiments. Similarly, "element one," "element two," and so on do not represent the order of elements; these terms are used only to distinguish one element from another. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A heat-insulating sleeve for the cathode steel rod head of an aluminum electrolytic cell, characterized in that, Includes: main support section and side support section; The main support section is a rectangular plate structure; The side support is a rectangular plate structure; one end of the side support in the width direction is located on the main support in the width direction; one end of the side support in the length direction is flush with one end of the main support in the length direction. There are two side support portions; the two side support portions are symmetrically arranged at both ends of the main support portion in the width direction; the side support portions are perpendicular to the main support portion; The two side support portions and the main support portion are configured as a U-shaped groove; The length of the main support is twice the length of the side support; A heat insulation layer is provided on the inner side of the main support part; A second heat insulation layer is provided on the inner side of the side support.

2. The heat insulation sleeve for the cathode steel rod head of the aluminum electrolytic cell according to claim 1, characterized in that, The main support and the side support are integrated.

3. The heat insulation sleeve for the cathode steel rod head of the aluminum electrolytic cell according to claim 2, characterized in that, The main support and the side support are made of calcium silicate composite insulation board.

4. The heat insulation sleeve for the cathode steel rod head of the aluminum electrolytic cell according to claim 3, characterized in that, The heat insulation layer is an aluminum silicate fiber layer.

5. The heat insulation sleeve for the cathode steel rod head of the aluminum electrolytic cell according to claim 3, characterized in that, The second heat insulation layer is an aluminum silicate fiber layer.

6. The heat insulation sleeve for the cathode steel rod head of the aluminum electrolytic cell according to claim 1, characterized in that, One end of the main support has a notch.

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