Aluminum melt furnace launder with boron nitride reinforced refractory lining resistant to aluminum attack

Abstract

The utility model relates to aluminium melting furnace flow tank refractory layer technical field, and disclose aluminium melting furnace flow tank is with the boron nitride reinforced refractory layer that resists aluminium liquid corrosion, including flow channel, the flow channel is provided with the refractory lining in, the refractory lining includes a plurality of lining prefabricated part, this aluminium melting furnace flow tank is with the boron nitride reinforced refractory layer that resists aluminium liquid corrosion, through being provided with the refractory lining that constitutes by a plurality of lining prefabricated part in the flow channel, through being provided with connecting bolt at the flow channel bottom, the screw hole is seted up at the steel shell support layer lower surface of lining prefabricated part, through the cooperation of connecting bolt and screw hole, install and fix a plurality of lining prefabricated part in the flow channel, constitute the refractory lining that resists aluminium water, when partial damage occurs, only need to replace the damaged lining prefabricated part, need not to re -pour, more simple and reduce the cost.

Description

Technical Field

[0001] This utility model relates to the technical field of refractory layer for aluminum melting furnace flow channels, specifically a boron nitride-reinforced refractory layer for aluminum melting furnace flow channels that resists aluminum liquid erosion. Background Technology

[0002] The aluminum melting furnace flow channel (also known as the aluminum liquid flow channel, guide channel, or aluminum outlet channel) is a key transition channel connecting the aluminum melting furnace with the casting machine, holding furnace, or the next process equipment. It is specially designed to safely and controllably guide and transport high-temperature molten aluminum. It plays the role of a "metal flow bridge" in the aluminum and aluminum alloy melting and casting production line. In order to protect the aluminum melting furnace flow channel from being melted through by the high-temperature aluminum liquid, a refractory layer is installed inside the aluminum melting furnace flow channel to resist the high-temperature aluminum liquid.

[0003] Currently, the refractory layers used in traditional aluminum melting furnace troughs on the market are mostly cast-in-place structures. When damage occurs in a localized area of ​​this type of refractory layer, it is necessary to replace the entire cast-in-place refractory layer on the aluminum melting furnace trough and recast it, which is quite troublesome and costly.

[0004] Therefore, we proposed a boron nitride-reinforced refractory layer for aluminum melting furnace flow channels to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the refractory layer used in the flow channel of the current aluminum melting furnace is mostly an integrated structure cast in one piece. When the refractory layer of this integrated structure is damaged in a local area, it is necessary to replace the entire refractory layer cast in the flow channel of the aluminum melting furnace and recast it, which is troublesome and costly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a boron nitride-reinforced refractory layer for aluminum melt furnace flow channel, comprising: a flow channel, wherein a refractory lining is provided in the flow channel, and the refractory lining comprises multiple lining prefabricated components;

[0007] The prefabricated lining component includes a working layer, a transition layer is provided on the lower surface of the working layer, a heat insulation layer is provided on the lower surface of the transition layer, and a steel shell support layer is provided on the lower surface of the heat insulation layer.

[0008] The bottom of the flow channel is provided with multiple connecting bolts, and the lower surface of the steel shell support layer is provided with threaded holes, and the connecting bolts are threadedly connected to the threaded holes.

[0009] Furthermore, a protrusion is provided at one end of the working layer, and a connection notch is provided on the upper surface of the working layer near the other end, wherein the protrusion is adapted to the connection notch.

[0010] Furthermore, the working layer is made of boron nitride material.

[0011] Furthermore, the transition layer is made of corundum material.

[0012] Furthermore, the insulation layer is made of heat-insulating bricks.

[0013] Furthermore, multiple anchors are welded onto the inner wall of the steel shell support layer, and the anchors are embedded in the heat insulation layer.

[0014] Furthermore, multiple grooved flow channels are provided on both inner sidewalls of the working layer, and the edges of the grooved flow channels are set with rounded corners. A covering part is provided on the top of the working layer, which covers the top of the transition layer, the heat insulation layer, and the steel shell support layer.

[0015] The beneficial effects of this utility model are as follows: By setting a refractory lining composed of multiple prefabricated lining components in the flow channel, by setting connecting bolts at the bottom of the flow channel, and by opening threaded holes on the lower surface of the steel shell support layer of the prefabricated lining components, the multiple prefabricated lining components are installed and fixed in the flow channel through the cooperation of the connecting bolts and the threaded holes, forming a refractory lining that resists molten aluminum. In the event of local damage, only the damaged prefabricated lining component needs to be replaced, without the need for recasting, which is simpler and reduces costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the boron nitride-reinforced refractory layer for the aluminum melting furnace flow channel of this utility model;

[0017] Figure 2 This is a first cross-sectional view of the boron nitride-reinforced refractory layer for aluminum melt trough in the aluminum melting furnace of this utility model.

[0018] Figure 3 This is a second cross-sectional view of the boron nitride-reinforced refractory layer for aluminum melt trough in the aluminum melting furnace of this utility model.

[0019] Figure 4 This is a schematic diagram of the prefabricated inner lining component of the anti-aluminum liquid erosion boron nitride reinforced refractory layer for the aluminum melting furnace flow channel of this utility model.

[0020] The names corresponding to each mark in the diagram:

[0021] 1. Flow channel; 2. Inner lining prefabricated component; 21. Working layer; 22. Transition layer; 23. Insulation layer; 24. Steel shell support layer; 3. Connecting bolt; 4. Protrusion; 5. Connecting notch; 6. Anchor; 7. Groove flow channel; 8. Covering part. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] Embodiments of this utility model:

[0024] like Figures 1-4 As shown, this utility model provides a boron nitride-reinforced refractory layer for aluminum melting furnace flow channels, including a flow channel 1. A refractory lining is provided within the flow channel 1. The refractory lining includes multiple lining preforms 2. Each lining preform 2 includes a working layer 21 made of boron nitride material. The working layer 21 directly resists the erosion, penetration, and scouring of molten aluminum. A transition layer 22 made of corundum material is provided on the lower surface of the working layer 21. The transition layer 22 buffers thermal stress and improves the refractory layer's performance. High thermal shock resistance; the lower surface of the transition layer 22 is provided with a heat insulation layer 23, which is made of heat insulation bricks. The heat insulation layer 23 reduces heat loss, protects the flow channel 1, and lowers the temperature of the flow channel 1. The lower surface of the heat insulation layer 23 is provided with a steel shell support layer 24. Multiple connecting bolts 3 are provided at the bottom of the flow channel 1. The lower surface of the steel shell support layer 24 is provided with threaded holes. The connecting bolts 3 are threadedly connected to the threaded holes. As needed, the connecting bolts 3 can be removed to disassemble and replace the inner lining prefabricated component 2.

[0025] like Figures 1-4 As shown, a protrusion 4 is provided at one end of the working layer 21, and a connecting groove 5 is provided on the upper surface of the working layer 21 near the other end. The protrusion 4 and the connecting groove 5 are adapted to each other. Through this arrangement, the gap between the two inner lining preforms 2 forms a staggered stepped structure, which blocks the penetration of aluminum liquid. It is worth mentioning that when the flow channel 1 is inclined, the end of the working layer 21 with the connecting groove 5 is located at a high position, and the end of the working layer 21 with the protrusion 4 is located at a low position. This allows the staggered stepped gap between the two inner lining preforms 2 to form an inclined structure, and the height difference improves the effect of blocking the penetration of aluminum liquid.

[0026] like Figures 1-4 As shown, multiple anchors 6 are welded onto the inner wall of the steel shell support layer 24. The anchors 6 are embedded in the heat insulation layer 23. The anchors 6 are one or more of Y-type anchors, X-type anchors, and V-type anchors.

[0027] like Figures 1-4As shown, multiple grooved flow channels 7 are provided on both inner side walls of the working layer 21. The edges of the grooved flow channels 7 are rounded. A covering part 8 is provided on the top of the working layer 21. The covering part 8 covers the top of the transition layer 22, the heat insulation layer 23, and the steel shell support layer 24. This arrangement increases the capacity and prevents the aluminum liquid from overflowing when the flow of aluminum liquid in the flow channel 1 is too slow.

Claims

1. A boron nitride-reinforced refractory layer for aluminum melt flow channels in aluminum melting furnaces, characterized in that, include: The flow channel (1) is provided with a refractory lining, which includes multiple lining prefabricated parts (2). The inner lining prefabricated component (2) includes a working layer (21), a transition layer (22) is provided on the lower surface of the working layer (21), a heat insulation layer (23) is provided on the lower surface of the transition layer (22), and a steel shell support layer (24) is provided on the lower surface of the heat insulation layer (23). The bottom of the flow channel (1) is provided with multiple connecting bolts (3), and the lower surface of the steel shell support layer (24) is provided with threaded holes, and the connecting bolts (3) are threadedly connected to the threaded holes.

2. The boron nitride-reinforced refractory layer for aluminum melting furnace flow channels according to claim 1, characterized in that: The working layer (21) has a protrusion (4) at one end, and a connecting notch (5) is provided on the upper surface of the working layer (21) near the other end. The protrusion (4) is adapted to the connecting notch (5).

3. The boron nitride-reinforced refractory layer for aluminum melting furnace flow channels according to claim 1, characterized in that: The working layer (21) is made of boron nitride material.

4. The boron nitride-reinforced refractory layer for aluminum melting furnace flow channels according to claim 1, characterized in that: The transition layer (22) is made of corundum material.

5. The boron nitride-reinforced refractory layer for aluminum melting furnace flow channels according to claim 1, characterized in that: The insulation layer (23) is made of insulation bricks.

6. The boron nitride-reinforced refractory layer for aluminum melting furnace flow channels according to claim 1, characterized in that: Multiple anchors (6) are welded onto the inner wall of the steel shell support layer (24), and the anchors (6) are embedded in the heat insulation layer (23).

7. The boron nitride-reinforced refractory layer for aluminum melting furnace flow channels according to claim 1, characterized in that: Multiple grooved channels (7) are provided on both inner sidewalls of the working layer (21). The edges of the grooved channels (7) are rounded. A covering part (8) is provided on the top of the working layer (21). The covering part (8) covers the top of the transition layer (22), the heat insulation layer (23), and the steel shell support layer (24).

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