Device for compensating heat before finish rolling of steel billet based on flame impact heating

Abstract

The utility model relates to a heat compensation device before billet finish rolling based on flame impact heating, which comprises a device body, a heat compensation cavity is arranged in the device body along the length direction, a plurality of burners arranged in rows along the length direction are arranged at the top of the heat compensation cavity, and a roller way consisting of a plurality of roller shafts is arranged at the bottom of the heat compensation cavity; a groove in the length direction is formed in the bottom of the cavity, and a steel billet conveyed by the roller shaft is suspended at the top of the groove. And the cavity top and the cavity bottom of the device body are detachable. Through a flame impact heating mode, rapid heat compensation can be achieved, energy consumption is reduced, and the device has the advantages of being compact in structure, small in occupied area and easy to install and maintain. The device can flexibly meet the heating requirements of workpieces with different specifications and section sizes, the steel billet rolling temperature distribution is optimized, and the rolling energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to a reheating device, specifically a reheating device for steel billets before precision rolling based on flame impact heating, belonging to the field of steel billet precision rolling technology. Background Technology

[0002] In the steel production sector, the direct rolling process for steel billets imposes stringent technical requirements on the reheating process before finishing rolling.

[0003] Currently, induction heating technology is mainly used for rapid reheating of workpieces, but the following technical problems exist:

[0004] 1. High equipment investment costs: The investment costs for induction heating-related equipment are high;

[0005] 2. Difficult equipment layout: Induction heating equipment is large in size and must be given priority consideration during equipment layout.

[0006] 3. Low adaptability to working conditions: The equipment can only heat workpieces with fixed shapes, making it difficult to adapt to the dynamic needs of production lines with multiple specifications and cross-sectional dimensions.

[0007] 4. Low energy efficiency: Induction heating consumes a lot of energy and has high production costs. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a preheating device for steel billet finishing rolling based on flame impact heating.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A preheating device for steel billet finishing rolling based on flame impact heating includes a device body, wherein a heating chamber is provided within the device body along its length.

[0011] The top of the heating chamber is provided with several burners arranged in a row along the length direction, and the bottom of the chamber is provided with a roller track composed of several rollers.

[0012] Furthermore, the top and bottom of the cavity of the device body can be separated.

[0013] The top of the cavity of the aforementioned device is made of lightweight refractory material, and the bottom of the cavity is made of heavy refractory material.

[0014] The burners arranged on the top of the cavity are in n (n≥2) rows.

[0015] The spacing between adjacent burners is 2-5 times the width of the burner.

[0016] The height of the burner is 60-250 mm from the steel billet placed on the roller.

[0017] The rollers mentioned above are waterless cooled rollers.

[0018] The advantages of this utility model are:

[0019] This invention discloses a pre-finishing heating device for steel billets based on flame impact heating, suitable for pre-finishing heating of steel billets in direct rolling processes. It optimizes the entry temperature distribution of the steel billet and reduces rolling energy consumption, offering the following advantages:

[0020] 1. The equipment has a simple structure and controllable costs, reducing equipment investment costs;

[0021] 2. The equipment has a compact structure, reducing the difficulty of equipment layout and ensuring smooth coordination during operation;

[0022] 3. It can handle complex working conditions. The combustion system used by the equipment can be adjusted to the most suitable combustion intensity when facing different workpieces, which has a high degree of flexibility;

[0023] 4. Improve energy efficiency by using natural gas and pure oxygen as fuel and combustion aid, and precisely control the combustion process to improve energy efficiency. Attached Figure Description

[0024] Figure 1 This is a side view of the structural schematic diagram of the heat exchange device.

[0025] Figure 2 This is a schematic diagram of a single-row burner (Figure a shows a single-row burner, and Figure b shows the top of the flip-up cavity).

[0026] Figure 3 The diagram shows the structure of two rows of burners (Figure c shows two rows of burners, and Figure d shows the top of the lifting cavity).

[0027] The meanings of the markings in the attached diagram are as follows:

[0028] 1. Workpiece, 2. Lower part, 3. Upper part, 4. Roller, 5. Burner. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] A preheating device for steel billet finishing rolling based on flame impact heating consists of a heat preservation system, a combustion system, and a transportation system.

[0031] The insulation system is mainly composed of the main body of the device, which consists of an upper part 3 and a lower part 2, and the upper part 3 and the lower part 2 are detachable structures; preferably, the upper part 3 is made of lightweight refractory material, and the lower part 2 is made of heavyweight refractory material; the detachment method can be as follows: Figure 2 The flipping method shown in b, or as shown in... Figure 3 The lifting method shown in d.

[0032] The heavy refractory material used in the lower part can effectively resist the wear of the workpiece (steel billet) and the direct impact of the flame.

[0033] When the upper part 3 and the lower part 2 are combined, the interior is a heat-compensating cavity along the length direction.

[0034] The transport system is a roller conveyor consisting of several rollers 4. Preferably, the rollers 4 are waterless cooling rollers.

[0035] The combustion system consists of several burners 5 located at the upper part 3. Along the length direction, the burners 5 are arranged as follows: Figure 2 The arrangement shown can be single-row or multi-row, specifically selected according to the width of the steel billet, such as... Figure 3 Figure c shows a schematic diagram of the structure arranged in two rows; within a row, that is, along the length direction, the adjacent spacing of the burners 5 is 2-5 times the width of the burners 5; along the height direction, the distance between the burners 5 and the steel billet placed on the roller 4 is 60-250mm. Example

[0036] by Figure 1 10 burners combined with 5 Figure 2 For example, in a single-row setting, workpiece 1 with a side length of 150mm is transported.

[0037] Adjust the rotational speed of roller 4.

[0038] Using pure oxygen as the combustion-supporting gas, the heating intensity of 10 single-row burners is increased to the level of supplementary heating intensity.

[0039] When the head of workpiece 1 enters the heating chamber, it is heated by the flame impact of 10 single-row burners 5. During this period, 5 rollers 4 rotate to move workpiece 1. After the workpiece 1 is heated, it is moved out of the heating chamber from the left side.

[0040] This invention effectively utilizes high-temperature flames to directly impact the workpiece, rather than the convection between the flue gas generated by traditional combustion and the workpiece. It leverages the high temperature difference between the flame and the workpiece to achieve rapid heating and quick heat replenishment.

[0041] When the equipment is under maintenance or for other reasons, the upper part 3 can be removed and closed again after the maintenance work is completed.

[0042] Figure 3 It has a structure with two rows of burners 5, which can handle workpieces 1 with a width of 330mm and a thickness of 150mm.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A billet pre-heat device based on flame impingement heating, characterized by, The device comprises a device body, a heat supplementing cavity is arranged in the device body along the length direction, A plurality of burners are arranged in rows along the length direction on the top of the heat supplementing cavity, and a roller table composed of a plurality of roller shafts is arranged on the bottom of the heat supplementing cavity. The top and the bottom of the device body are detachable.

2. The apparatus of claim 1, wherein, The height of the burners is 60-250 mm from the billet placed on the roller shafts.

3. The apparatus of claim 1, wherein, The adjacent distance of the burners along the length direction is 2-5 times the width of the burners.

4. The apparatus of claim 1, wherein, The top of the device body is made of light refractory material, and the bottom is made of heavy refractory material.

5. The apparatus of claim 1, wherein, The burners arranged on the top are n (n≥2) rows.

6. The apparatus of claim 1, wherein, The roller shafts are waterless roller shafts.

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