Furnace ramming equipment for submerged arc furnace

Abstract

The utility model discloses stoking equipment for a submerged arc furnace, and belongs to the technical field of stoking of submerged arc furnaces. A third hydraulic cylinder is mounted in an L-shaped frame, a rotary connecting frame matched with a connecting piece is arranged at the telescopic end of the third hydraulic cylinder, and a mounting head is connected to the end of the rotary connecting frame; the rotation angle of the mounting head is changed through stretching of the third hydraulic cylinder; the end of the mounting head is connected with an extension rod, the end of the extension rod is connected with a shovel, and the extension rod extends into the submerged arc furnace through the telescopic pipe and pokes the furnace through the shovel. The tilting angle of the base pipe is adjusted through the first hydraulic cylinder, the requirements for opening and stoking of different submerged arc furnaces are met, and adaptability and operation accuracy are improved. The second hydraulic cylinder accurately controls the length of the telescopic pipe, accurate control over the stoking depth is achieved, and the stoking efficiency and quality are improved. The third hydraulic cylinder adjusts the rotating angle of the mounting head, so that the shovel is aligned with a stoking area, and the operation accuracy and efficiency are improved. The shovel is firmly connected with the extension rod and matched with the furnace body in shape, and smooth and efficient stoking of the furnace is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tamping furnaces of submerged arc furnaces, in particular to tamping equipment for submerged arc furnaces. Background Art

[0002] The ramming device of a submerged arc furnace plays a central role in the system, responsible for maintaining a smooth and uniform charge surface within the furnace, which is crucial to the smooth operation of the smelting process. The submerged arc furnace, a cornerstone of the metallurgical industry, transforms raw materials such as ore, carbonaceous reducing agents, and solvents through arc or resistance heating into ferroalloys such as ferrosilicon, ferromanganese, and ferrochrome, as well as chemical products such as calcium carbide. The condition of the charge surface within the furnace directly impacts smelting efficiency and product quality. Therefore, the performance and efficiency of the ramming device are crucial to the overall operation of the submerged arc furnace.

[0003] However, current submerged arc furnace ramming devices face several operational challenges. While the device can cover a wide range of operating requirements, it struggles with fine adjustments. This limits its performance for delicate operations, such as cleaning slag in corners or specific areas within the furnace, potentially impacting the overall efficiency and stability of the submerged arc furnace.

[0004] Furthermore, wear and tear of the ramming shovel is a normal part of operations, and regular replacement is essential to ensure continuous and efficient operation. However, the existing ramming shovel replacement process is cumbersome, time-consuming, and labor-intensive, increasing operational costs. Untimely replacement can also lead to production interruptions, threatening production schedules. Utility Model Content

[0005] The main purpose of the utility model is to provide a ramming device for a submerged arc furnace, which can effectively solve the problems raised in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A ramming device for a submerged arc furnace comprises a mobile vehicle, a support frame, a first hydraulic cylinder, and a base pipe. The support frame is mounted on the mobile vehicle, and the base pipe is hinged to the support frame. The first hydraulic cylinder is mounted on the mobile vehicle and hinged to the base pipe. The first hydraulic cylinder is extended and retracted to change the tilting angle of the base pipe.

[0008] A telescopic tube is provided inside the base tube, and a connecting piece is provided at the upper end of the telescopic tube. A second hydraulic cylinder is installed at the upper end of the base tube, and a telescopic end of the second hydraulic cylinder is connected to the connecting piece. The extension length of the telescopic tube is adjusted by the extension of the second hydraulic cylinder.

[0009] An L-shaped frame is provided at the lower end of the telescopic tube, and a third hydraulic cylinder is installed in the frame of the L-shaped frame. The telescopic end of the third hydraulic cylinder is provided with a rotating connecting frame adapted to the connecting piece. The end of the rotating connecting frame is connected to the mounting head. The rotation angle of the mounting head is changed by the extension and contraction of the third hydraulic cylinder.

[0010] The end of the mounting head is connected with an extension rod, and the end of the extension rod is connected with a shovel, which is extended into the submerged arc furnace through a telescopic tube and is used to tamp the furnace.

[0011] In a further preferred embodiment, the first hydraulic cylinder is mounted on the mobile vehicle by bolts, the base tube and the telescopic tube are both square tubes, and the corners of the base tube and the telescopic tube are designed to be arc-shaped, and a stop block is provided at the inner end of the telescopic tube to prevent the telescopic tube from falling out of the base tube.

[0012] In a further preferred embodiment, the telescopic end of the second hydraulic cylinder is connected to the connecting piece via a rotating shaft, and the connecting piece is welded and fixed to the end of the telescopic tube, and the L-shaped frame is welded to the connecting piece and fixed to the telescopic tube via bolts;

[0013] In a further preferred embodiment, the L-shaped frame is fixed to the third hydraulic cylinder by bolts, and the telescopic end of the third hydraulic cylinder is provided with a sleeve, which is connected to the round rod of the rotary connecting frame;

[0014] In a further preferred embodiment, the mounting head is divided into a mounting portion and a disc portion, the disc portion is located on the end surface of the mounting portion, the mounting portion is fixed to the rotating connecting frame, the outer end of the disc portion is provided with a clamping block, the rod head of the extension rod is inserted into the clamping block, and the extension rod and the clamping block are connected by bolts, nuts and anti-slip washers;

[0015] In a further preferred embodiment, the shovel is fixed to the extension rod by bolts, and the shape of the shovel is adapted to the furnace body of the submerged arc furnace.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this utility model, the flexible extension and retraction of the first hydraulic cylinder allows the base pipe to be easily adjusted in its tilting angle. This design ensures that the tamping device can flexibly accommodate ore-fired furnace openings of varying sizes and shapes, while also meeting the requirements of tamping furnaces of varying depths. This design significantly improves the adaptability of tamping operations while ensuring accuracy and safety during the operation.

[0018] The precise telescopic movement of the second hydraulic cylinder effectively regulates the extension length of the telescopic tube, thereby achieving precise control of the tamping depth. This function effectively solves the problems of uneven tamping depth and incomplete tamping that may occur with traditional tamping methods, greatly improving tamping efficiency and quality.

[0019] Furthermore, the third hydraulic cylinder, through its telescopic motion, allows for flexible adjustment of the mounting head's rotation angle, enabling fine-tuning of the shovel. This angle adjustment not only improves the accuracy of the tamping operation but also reduces the operator's workload, further enhancing work efficiency.

[0020] The quick-connect design between the shovel and the mounting head makes changing shovels of different sizes quick and easy. The secure connection between the shovel and the extension rod, along with the perfect fit of the shovel's shape with the submerged arc furnace, ensures a smooth and efficient tamping process. The shovel's stability and adaptability make tamping operations more user-friendly, further improving efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a side view of the overall structure of the utility model;

[0023] Figure 3 This is a top view of the overall structure of the utility model;

[0024] Figure 4 This is a diagram showing the telescopic tube, rotating connecting frame and shovel of the utility model.

[0025] In the figure: 1. Mobile vehicle; 2. Support frame; 3. First hydraulic cylinder; 4. Base pipe; 5. Second hydraulic cylinder; 6. Telescopic tube; 7. Connector; 8. L-shaped frame; 9. Third hydraulic cylinder; 10. Rotating connecting frame; 11. Mounting head; 12. Extension rod; 13. Shovel. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1 - Figure 4 As shown, a ramming device designed specifically for an ore-fired furnace is composed of multiple key components, including a mobile vehicle 1, a support frame 2, a first hydraulic cylinder 3, a base pipe 4, a second hydraulic cylinder 5, a telescopic tube 6, a connecting piece 7, an L-shaped frame 8, a third hydraulic cylinder 9, a rotating connecting frame 10, a mounting head 11, an extension rod 12, and a shovel 13.

[0028] The mobile carriage 1 serves as the mobile platform for the entire equipment, stably supporting all subsequent components. The support frame 2 is securely mounted on the mobile carriage 1, providing a solid foundation for subsequent components. The base pipe 4 is connected to the support frame 2 via a clever hinged connection, while the first hydraulic cylinder 3 is mounted on the mobile carriage 1 and similarly articulated to the base pipe 4. The telescopic movement of the first hydraulic cylinder 3 allows the base pipe 4's tilting angle to be flexibly adjusted to accommodate varying furnace tamping requirements.

[0029] Inside the base pipe 4, a telescopic tube 6 is cleverly designed. A connector 7 is mounted on the upper end of the tube 6, while a second hydraulic cylinder 5 is mounted on the upper end of the base pipe 4. The telescopic end of the second hydraulic cylinder 5 is tightly connected to the connector 7. Through its telescopic motion, the extension length of the telescopic tube 6 can be precisely adjusted, thereby achieving precise control of the ramming depth.

[0030] The lower end of the telescopic tube 6 is cleverly fitted with an L-shaped frame 8, within which a third hydraulic cylinder 9 is securely mounted. The telescopic end of the third hydraulic cylinder 9 is equipped with a rotating connector 10 that perfectly matches the connector 7. The end of the rotating connector 10 is tightly connected to the mounting head 11. The telescopic movement of the third hydraulic cylinder 9 allows the rotation angle of the mounting head 11 to be flexibly adjusted to accommodate varying furnace tamping angles.

[0031] The end of the mounting head 11 is tightly connected to the extension rod 12, and the end of the extension rod 12 is equipped with a shovel 13. During the tamping process, the telescopic tube 6 extends into the furnace, and the tamping operation is carried out using the shovel 13. This design not only improves the accuracy of the tamping operation, but also greatly enhances work efficiency.

[0032] The first hydraulic cylinder 3 is securely bolted to the mobile vehicle 1, ensuring stability and reliability. Both the base tube 4 and the telescopic tube 6 are square tubes with curved corners, creating both aesthetics and practicality. A stopper is also provided at the inner end of the telescopic tube 6 to effectively prevent it from falling out of the base tube 4 during extension and retraction.

[0033] Furthermore, the telescopic end of the second hydraulic cylinder 5 and the connector 7 are connected by a rotating shaft, providing both flexibility and stability. The connector 7 is welded to the end of the telescopic tube 6, ensuring a secure connection. The L-shaped frame 8 is also secured to the connector 7 using welding and bolts, further enhancing the stability and safety of the entire device.

[0034] The third hydraulic cylinder 9 is also securely connected to the L-shaped frame 8 via bolts. Its telescopic end is fitted with a sleeve, which tightly connects to the round rod of the rotating connecting frame 10, ensuring its stability and flexibility. The mounting head 11 is cleverly divided into two parts: a mounting portion and a disc. The disc is located at the end of the mounting portion and is tightly connected to the extension rod 12 via a clamping block. The clamping block is equipped with bolts, nuts, and non-slip washers, ensuring a secure connection between the extension rod 12 and the clamping block.

[0035] The shovel 13 is firmly fixed to the extension rod 12 by bolts. Its shape is perfectly adapted to the furnace body of the submerged arc furnace, ensuring smooth and efficient tamping process.

[0036] During Use: Ensure that mobile vehicle 1 is in a stable position near the submerged arc furnace and secure its brakes to prevent movement during the ramming process. Check the hydraulic oil level in all hydraulic cylinders (first hydraulic cylinder 3, second hydraulic cylinder 5, and third hydraulic cylinder 9) to ensure sufficient oil and no leaks. Check that all connectors 7 (such as bolts, nuts, and shaft connections) are secure and not loose.

[0037] The first hydraulic cylinder 3 is activated to adjust the tilting angle of the base pipe 4 through its telescopic action to adapt to the opening size and ramming depth requirements of the submerged arc furnace. After the angle adjustment is completed, the locking device of the first hydraulic cylinder 3 is locked to keep the base pipe 4 stable.

[0038] Start the second hydraulic cylinder 5 and adjust the extension length of the telescopic tube 6 through its telescopic action, and accurately control it according to the actual situation inside the submerged arc furnace and the requirements of the furnace. After the length adjustment is completed, observe the extension state of the telescopic tube 6 to ensure that there is no abnormality.

[0039] Start the third hydraulic cylinder 9 and adjust the rotation angle of the mounting head 11 through its telescopic action so that the shovel 13 can be accurately aligned with the ramming area inside the submerged arc furnace. After the angle adjustment is completed, the locking device of the third hydraulic cylinder 9 is locked to keep the shovel 13 stable.

[0040] The operator controls the mobile vehicle 1 to slowly approach the blast furnace so that the shovel 13 can smoothly enter the furnace. According to the needs of the blast furnace, the shovel 13 is controlled to perform the blast furnace operation in the furnace by controlling the extension and rotation of the hydraulic cylinder. During the blast furnace operation, pay attention to the working status of the shovel 13 and the situation in the furnace to ensure the safety and efficiency of the blast furnace operation. After the blast furnace operation is completed, the shovel 13 is pulled out of the furnace and the power supply of all hydraulic cylinders is turned off. Check whether the blast furnace device is damaged or worn, and repair or replace it in time if necessary. Drive the mobile vehicle 1 away from the blast furnace area and perform necessary cleaning and maintenance work. The blast furnace device can complete the blast furnace operation efficiently and accurately, thereby improving the production efficiency and safety of the blast furnace.

[0041] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. However, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A ramming device for an electric arc furnace, comprising a mobile vehicle (1), a support frame (2), a first hydraulic cylinder (3) and a base pipe (4), wherein the support frame (2) is mounted on the mobile vehicle (1), and the base pipe (4) is hinged to the support frame (2), and the first hydraulic cylinder (3) is mounted on the mobile vehicle (1) and hinged to the base pipe (4), and the first hydraulic cylinder (3) is extended and retracted to change the tilting angle of the base pipe (4), characterized in that: A telescopic tube (6) is provided inside the base tube (4), and a connecting piece (7) is provided at the upper end of the telescopic tube (6). A second hydraulic cylinder (5) is installed at the upper end of the base tube (4), and the telescopic end of the second hydraulic cylinder (5) is connected to the connecting piece (7). The extension length of the telescopic tube (6) is adjusted by the telescopic movement of the second hydraulic cylinder (5). The lower end of the telescopic tube (6) is provided with an L-shaped frame (8), and a third hydraulic cylinder (9) is installed in the frame of the L-shaped frame (8). The telescopic end of the third hydraulic cylinder (9) is provided with a rotating connecting frame (10) adapted to the connecting piece (7). The end of the rotating connecting frame (10) is connected to a mounting head (11). The rotation angle of the mounting head (11) is changed by the telescopic movement of the third hydraulic cylinder (9). The end of the mounting head (11) is connected to an extension rod (12), and the end of the extension rod (12) is connected to a shovel (13), which extends into the submerged arc furnace through the telescopic tube (6) and is used to tamp the furnace.

2. The ramming equipment for a submerged arc furnace according to claim 1, characterized in that: The first hydraulic cylinder (3) is mounted on the mobile vehicle (1) by means of bolts. The base tube (4) and the telescopic tube (6) are both square tubes, and the corners of the base tube (4) and the telescopic tube (6) are designed to be arc-shaped. A blocking block is provided at the inner end of the telescopic tube (6), and the blocking block prevents the telescopic tube (6) from falling out of the base tube (4).

3. The ramming equipment for a submerged arc furnace according to claim 2, characterized in that: The telescopic end of the second hydraulic cylinder (5) is connected to the connecting piece (7) via a rotating shaft, and the connecting piece (7) is welded and fixed to the end of the telescopic tube (6), and the L-shaped frame (8) is welded to the connecting piece (7) and fixed to the telescopic tube (6) via bolts.

4. The ramming equipment for a submerged arc furnace according to claim 3, characterized in that: The L-shaped frame (8) and the third hydraulic cylinder (9) are fixed by bolts, and the telescopic end of the third hydraulic cylinder (9) is provided with a sleeve, which is connected to the round rod of the rotating connecting frame (10).

5. The ramming equipment for a submerged arc furnace according to claim 4, characterized in that: The mounting head (11) is divided into a mounting portion and a disc portion, the disc portion is located at the end surface of the mounting portion, the mounting portion is fixed to the rotating connecting frame (10), the outer end of the disc portion is provided with a clamping block, the rod head of the extension rod (12) is inserted into the clamping block, and the extension rod (12) and the clamping block are connected by bolts, nuts and anti-slip gaskets.

6. The ramming equipment for a submerged arc furnace according to claim 5, characterized in that: The shovel (13) is fixed to the extension rod (12) by means of bolts, and the shape of the shovel (13) is adapted to the furnace body of the submerged arc furnace.

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