Chute liner for a mine

Abstract

This utility model discloses a chute liner for mining, comprising a steel plate. The bottom of the steel plate is cast with low-carbon alloy steel, and the upper part is cast with high-chromium alloy. Hard alloy rods are embedded within the high-chromium alloy. Both the steel plate and the low-carbon alloy steel have an arc-shaped structure. During liner casting, the steel plate needs to be embedded within a foam-made mold layer, and the surface of the steel plate needs to be ground and pickled to ensure it is rust-free. This invention solves the problem that many current large-scale mine chute liners are produced using only high-chromium cast iron. The bottom of the chute liner and the chute body are both arc-shaped, and if the fit between the liner and the chute body is not tight, voids will occur. The liner is easily cracked under the impact of stones, requiring the addition of filler during installation, increasing the installation difficulty. Furthermore, high-chromium cast iron has high wear resistance but poor machinability.

Description

Technical Field

[0001] This utility model relates to the field of chute liner production technology, specifically to a chute liner for mining. Background Technology

[0002] The chute liner is a key component used to protect the inner wall of the chute and reduce material impact and friction wear. The choice of its material directly affects the equipment life, maintenance costs and conveying efficiency.

[0003] Currently, many chute liners in large mines are produced using high-chromium cast iron as the sole material. The bottom of the chute liner and the main body of the chute are both curved. If the chute liner and the main body of the chute do not fit tightly, there will be hollow areas. The liner is prone to cracking under the impact of stones. Therefore, when installing the chute liner, filler needs to be added, which increases the difficulty of installation. High-chromium cast iron has high wear resistance but poor machinability.

[0004] To address the aforementioned problems, this application proposes a chute liner for mining. Utility Model Content

[0005] In response to the problems in related technologies, this utility model provides a chute liner for mining, which can help the mining industry solve the problem of inconvenient installation of chute liners, improve the wear resistance of chute liners, and extend their service life.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A chute liner for mining includes a steel plate, the bottom of which is cast with low-carbon alloy steel, and the upper part of which is cast with high-chromium alloy. Hard alloy rods are embedded in the high-chromium alloy. Both the steel plate and the low-carbon alloy steel have an arc-shaped structure.

[0008] As a further embodiment of this utility model, the steel plate needs to be embedded in a foam-made model interlayer during the casting of the liner plate, and the surface of the steel plate needs to be polished and pickled to ensure that the surface is free of rust.

[0009] As a further embodiment of this invention, the cemented carbide rod is uniformly distributed in the high-chromium alloy portion.

[0010] As a further embodiment of this invention, the cemented carbide rod needs to be welded to the top for auxiliary fixing during the casting of the liner plate.

[0011] The beneficial effects of this utility model are as follows:

[0012] This invention utilizes a highly machinable low-carbon alloy steel at the bottom of the chute liner, allowing the machined liner to fit seamlessly into the chute body. Furthermore, the wear-prone areas at the top of the liner are made of high-chromium alloy, and the two are thermally bonded together, significantly improving the impact toughness of the high-chromium alloy and preventing cracking. Installation is convenient, and the high-chromium alloy is also uniformly inlaid with hard alloy rods, further enhancing the wear resistance of the liner and extending its service life. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of a mine chute liner according to an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the production process of a mining chute liner according to an embodiment of the present utility model.

[0016] In the picture:

[0017] 1. Steel plate; 2. Low carbon alloy steel; 3. High chromium alloy; 4. Hard alloy bar; 5. Steel nail. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a chute liner for mining is provided.

[0020] Please refer to the instruction manual appendix. Figure 1-2According to an embodiment of the present invention, a chute liner for mining includes a steel plate 1, a low-carbon alloy steel 2 cast at the bottom of the steel plate 1, a high-chromium alloy 3 cast at the top of the steel plate 1, and a cemented carbide rod 4 embedded in the high-chromium alloy 3. The cemented carbide rod 4 is evenly distributed in the high-chromium alloy 3. Both the steel plate 1 and the low-carbon alloy steel 2 are arc-shaped structures. The steel plate 1 needs to be embedded in a foam-made mold sandwich layer during the liner casting process, and the surface of the steel plate 1 needs to be polished and pickled to ensure that the surface is rust-free. By setting a highly machinable low-carbon alloy steel 2 at the bottom of the chute liner, the machined chute liner can fit well with the chute body without gaps. In addition, the wear part at the top of the chute liner is made of high-chromium alloy 3, and the two are thermally bonded together, which greatly improves the impact toughness of the high-chromium alloy 3, avoids cracking of the liner, and facilitates installation. Moreover, hard alloy rods 4 are uniformly embedded in the high-chromium alloy 3, which can further improve the wear resistance of the chute liner and increase its service life.

[0021] In one embodiment, please refer to the appendix to the specification. Figure 1 and Figure 2 As a further embodiment of this utility model, the method for preparing the chute liner includes the following steps:

[0022] S1: First, based on the lost foam vacuum casting method adopted, make a lost foam model of the foam according to the size of the chute liner;

[0023] S2: Select a suitable steel plate 1, grind and pickle it to make its surface rust-free, and the size of steel plate 1 is larger than the size of the model. After completion, put it into the sandwich of the model, and at the same time, embed the carbide rod 4 in the high chromium alloy 3 part, and the steel nail 5 at the top of the carbide rod 4 needs to be exposed.

[0024] S3: Paint the model and dry it, then embed it in the sand box;

[0025] S4: Vacuum the sand box so that the sand will tightly lock the exposed steel nails 5 and exposed steel plate 1, ensuring that the alloy rod and steel plate 1 do not shift during casting.

[0026] S5: During casting, pouring gate a and pouring gate b are poured simultaneously.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A chute liner for mining, comprising a steel plate (1), characterized in that: The bottom of the steel plate (1) is cast with low carbon alloy steel (2), and the upper part of the steel plate (1) is cast with high chromium alloy (3). The high chromium alloy (3) is inlaid with a hard alloy rod (4). Both the steel plate (1) and the low carbon alloy steel (2) are arc-shaped structures.

2. The chute liner for mining according to claim 1, characterized in that: The steel plate (1) is built inside the liner, and the surface of the steel plate (1) is a rust-free surface that has been polished and pickled.

3. A chute liner for mining according to claim 1, characterized in that: The cemented carbide rod (4) is evenly distributed in the high-chromium alloy (3) section.

4. A chute liner for mining according to claim 1, characterized in that: The top of the carbide rod (4) is welded with a steel nail (5) for auxiliary fixation.

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