Clamping fixture for fettling steelmaking intermediate frequency furnace

Abstract

The utility model provides a fettling mould for a steelmaking intermediate frequency furnace. The fettling mould comprises a cylinder body, a frustum-shaped cylinder bottom and a sealing plate, the frustum-shaped barrel bottom is arranged at the bottom of the barrel body, and the sealing plate is arranged on the frustum-shaped barrel bottom; furnace lining repairing cavities for containing furnace lining ramming materials are formed between the cylinder body and the inner side wall of the steelmaking intermediate frequency furnace and between the frustum-shaped cylinder bottom and the bottom of a furnace cavity of the steelmaking intermediate frequency furnace respectively. According to the fettling mould for the steelmaking intermediate frequency furnace, the cooling time for repairing the furnace lining can be shortened, and the fettling efficiency of the steelmaking intermediate frequency furnace and the consistency of overall shaping of the furnace lining are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steelmaking furnace repairing equipment, and specifically relates to a mould for repairing a steelmaking intermediate frequency furnace. BACKGROUND

[0002] The furnace lining of the intermediate frequency furnace for steelmaking plays an important role in the realization of the smelting process and the guarantee of the quality of the molten steel. After the thickness loss of the furnace lining reaches a certain degree, the furnace is repaired and maintained in order to obtain a longer service life and lower consumption cost. Under normal circumstances, when the furnace lining of the intermediate frequency furnace for steelmaking is repaired and maintained, plastic mud is usually used, and the repair is carried out by workers manually in a local part of the furnace wall in a point or patch shape. The number of uses after the repair is limited, and the repair operation is frequent, usually several or tens of times. Moreover, the repair material is prone to peeling off, and the molten steel can continue to erode at the peeling place of the repair material of the furnace wall, increasing the risk of furnace lining penetration during the smelting process. At the same time, the repair and maintenance operation usually requires the furnace lining temperature to be reduced to a certain degree before it can be carried out. The frequent cold and hot alternation of the furnace lining not only causes waste of heat energy of the furnace body, but also increases the cracking probability of the furnace lining, ultimately leading to low service life of the furnace lining, fast consumption of the intermediate frequency furnace lining material, high smelting comprehensive cost, and low operation efficiency.

[0003] The invention patent application with the application publication number CN118406832A discloses a converter tapping synchronous furnace repairing and maintaining device and method, which comprises a furnace lining detection component, a furnace repairing gun, a support base, a rotating shaft provided on the support base, the furnace repairing gun being hinged on the rotating shaft and being movable along the extension direction of the furnace repairing gun. A shotcrete tank, an operation platform, a controller connected with the furnace repairing gun, which is used to determine the position, depth and diameter of each material area to be repaired according to the thickness of the furnace lining, determine the target shotcrete pressure and target shotcrete time of the furnace repairing gun according to the depth and diameter of the material area to be repaired, and control the furnace repairing gun to carry out shotcrete according to the target shotcrete pressure and target shotcrete time. The converter tapping synchronous furnace repairing and maintaining device can carry out different forms of shotcrete operation for different depths and diameters of the material area to be repaired, effectively avoid shotcrete peeling off, reduce the waste of materials and time, improve the efficiency of the furnace repairing during the converter tapping, and improve the degree of automation. However, the converter tapping synchronous furnace repairing and maintaining device still needs to be repaired after the furnace body is cooled, and the furnace repairing is carried out only by the furnace repairing gun, so it is difficult to control the thickness, and the overall shaping of the furnace lining is difficult to be uniform. UTILITY MODEL CONTENTS

[0004] In order to reduce the cooling time of the repaired furnace lining, improve the efficiency of the intermediate frequency furnace repairing for steelmaking, and ensure the consistency of the overall shaping of the furnace lining, the utility model adopts the technical scheme of a mould for repairing a steelmaking intermediate frequency furnace, which comprises a cylinder, a conical frustum cylinder bottom and a sealing plate. The conical frustum cylinder bottom is arranged at the bottom of the cylinder, and the sealing plate is arranged on the conical frustum cylinder bottom. The cylinder and the inner side wall of the steelmaking intermediate frequency furnace, and the conical frustum cylinder bottom and the bottom of the furnace cavity of the steelmaking intermediate frequency furnace form furnace lining repairing cavities for accommodating furnace lining ramming material, respectively.

[0005] Based on the above, in order to match the shape of the inner wall of the steelmaking intermediate frequency furnace, the barrel body is a hollow cylindrical barrel body, and a hollow cavity is formed in the inside of the hollow cylindrical barrel body.

[0006] Based on the above, in order to facilitate ventilation, a plurality of exhaust holes communicating with the hollow cavity are formed on the side wall of the barrel body.

[0007] Based on the above, in order to improve the structural strength of the barrel body, a shaped flange is connected to the upper part of the barrel body.

[0008] Based on the above, the shaped flange is welded on the inner wall of the barrel body.

[0009] Based on the above, in order to facilitate hoisting, a lifting ring is arranged on the top of the barrel body.

[0010] Based on the above, in order to improve the uniformity of ventilation, a plurality of exhaust holes are distributed at equal intervals on the side wall of the barrel body.

[0011] The utility model discloses relative prior art has substantial feature and progress, specifically speaking, the utility model discloses a steelmaking intermediate frequency furnace repair furnace is used the mould of the utility model, through the design barrel body according to furnace lining shape, makes the furnace lining repair cavity between old furnace lining and mould after barrel body inserts steelmaking intermediate frequency furnace, adds ramming material to furnace lining repair cavity and carries out dry vibration and ramming, after ramming material is beaten, carries out oven baking, and the repair furnace work can be completed. The repair furnace material consumption is about half of the new furnace ramming consumption, and the service life of the furnace lining after repair and baking is equivalent to the service life of the new furnace, the raw material consumption is reduced by half, and the worker's furnace dismantling workload is reduced by half. At the same time, since it is not necessary to enter the furnace body for repair, the cooling time of the furnace lining is reduced.

[0012] Further, since the barrel body has a regular outer peripheral surface, the steelmaking intermediate frequency furnace repair efficiency and the consistency of the overall shaping of the furnace lining are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the mould for steelmaking intermediate frequency furnace repair of the utility model.

[0014] Figure 2 It is the cooperation structure schematic diagram of the mould for steelmaking intermediate frequency furnace repair and furnace lining of the utility model.

[0015] Figure 3 It is the cross section structure schematic diagram of the mould for steelmaking intermediate frequency furnace repair of the utility model.

[0016] In the drawing: 1, shaped flange, 2, hollow cavity, 3, lifting ring, 4, barrel body, 5, exhaust hole, 6, conical frustum barrel bottom, 7, sealing plate, 8, steelmaking intermediate frequency furnace, 9, furnace lining repair cavity. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model is described in further detail below through the specific embodiments.

[0018] Embodiment 1

[0019] The embodiment provides a jig for repairing a steelmaking intermediate frequency furnace, as shown in the drawings, comprising a cylinder 4, a frustum-shaped cylinder bottom 6 and a sealing plate 7. Figure 1 、 Figure 2 、 Figure 3 The frustum-shaped cylinder bottom 6 is arranged at the bottom of the cylinder 4, and the sealing plate 7 is arranged on the frustum-shaped cylinder bottom 6. The cylinder 4 and the inner side wall of the steelmaking intermediate frequency furnace 8 and the frustum-shaped cylinder bottom 6 and the bottom of the furnace cavity of the steelmaking intermediate frequency furnace 8 form a furnace lining repair cavity 9 for accommodating furnace lining ramming material, respectively.

[0020] Embodiment 2

[0021] The embodiment provides a jig for repairing a steelmaking intermediate frequency furnace, and the main difference from the embodiment 1 is that, in the embodiment, in order to match the shape of the inner wall of the steelmaking intermediate frequency furnace 8, the cylinder 4 is a hollow cylindrical cylinder, and a hollow cavity 2 for air permeation is formed in the inside of the hollow cylindrical cylinder.

[0022] Embodiment 3

[0023] The embodiment provides a jig for repairing a steelmaking intermediate frequency furnace, and the main difference from the embodiment 1 is that, in the embodiment, in order to facilitate air permeation, a plurality of exhaust holes 5 communicating with the hollow cavity 2 are arranged on the side wall of the cylinder 4. In order to improve the uniformity of air permeation, the plurality of exhaust holes 5 are distributed on the side wall of the cylinder 4 at equal intervals.

[0024] Embodiment 4

[0025] The embodiment provides a jig for repairing a steelmaking intermediate frequency furnace, and the main difference from the embodiment 1 is that, in the embodiment, in order to improve the structural strength of the cylinder, a shaped flange 1 is connected to the upper part of the cylinder 4. The shaped flange 1 is welded to the inner wall of the cylinder 4.

[0026] Embodiment 5

[0027] The embodiment provides a jig for repairing a steelmaking intermediate frequency furnace, and the main difference from the embodiment 1 is that, in the embodiment, in order to facilitate hoisting, a lifting ring 3 is arranged on the top of the cylinder 4.

[0028] Specifically, when the jig for repairing a steelmaking intermediate frequency furnace is used to repair the furnace lining, the specific operation steps are as follows:

[0029] First, the furnace after the expected to remove the lining surface sintering layer, wherein the lining is roughly divided into three layers, including sintering layer, semi-sintering layer and loose layer. Here only remove the sintering layer, do not remove the semi-sintering layer and loose layer,

[0030] Then the furnace lining surface sintering layer is removed, the mold is put into the furnace, the ramming material is added between the old furnace lining and the mold for dry vibration and ramming, after the ramming material is rammed, the furnace is baked, and the furnace repairing work is completed.

[0031] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical scheme of the present application, all should be covered in the technical scheme range of the present application claimed by the present application.

Claims

1. A jig for repairing an intermediate frequency furnace in steelmaking, characterized in that: The cylinder body, the frustoconical cylinder bottom and the sealing plate are provided. The frustoconical cylinder bottom is arranged at the bottom of the cylinder body, and the sealing plate is arranged on the frustoconical cylinder bottom. The cylinder body and the inner side wall of the steelmaking intermediate frequency furnace, and the frustoconical cylinder bottom and the bottom of the furnace cavity of the steelmaking intermediate frequency furnace form a furnace lining repair cavity for containing furnace lining ramming material, respectively.

2. The mould for the steelmaking medium frequency furnace according to claim 1, characterized in that: The cylinder body is a hollow cylindrical body, and a hollow cavity is formed in the hollow cylindrical body.

3. The mould for the steelmaking medium frequency furnace according to claim 2, characterized in that: A plurality of exhaust holes are arranged on the side wall of the cylinder body and communicate with the hollow cavity.

4. The mould for the furnace for the steelmaking according to claim 1 or 2 or 3, characterized in that: A shaped flange is connected to the upper part of the cylinder body.

5. The mould for the furnace of medium frequency for the steelmaking according to claim 4, characterized in that: The shaped flange is welded to the inner wall of the cylinder body.

6. The mould for the furnace for the steelmaking according to claim 1 or 2 or 3, characterized in that: A lifting ring is arranged at the top of the cylinder body.

7. The mould for the furnace of the steelmaking according to claim 3, characterized in that: The plurality of exhaust holes are equally spaced on the side wall of the cylinder body.

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