Converter fettling and heat preservation device for steelmaking converter

Abstract

The fettling and heat preservation device comprises a supporting frame, a forklift gear shaping in-out square hole, a heat preservation cover, furnace mouth supporting legs and a balance weight steel billet, and the forklift gear shaping in-out square hole is formed in the lower portion of a frame at the rear end of the supporting frame; a heat-insulating cover is arranged at the front end of the support frame; a counterweight steel billet is arranged on a lower frame at the rear end of the support frame; furnace mouth supporting legs are arranged on the lower bottom surface of the outer circle of the heat preservation cover; the furnace mouth supporting legs are fixedly connected with the supporting frame and the heat preservation cover; an auxiliary combustion oxygen supply hole is formed in the middle lower part of the heat preservation cover; the diameter of the heat preservation cover is matched with the size of a converter mouth. The high-temperature state of the converter lining can be kept during fettling maintenance, and the principle of high-temperature quick fettling during fettling maintenance of the converter is achieved. And meanwhile, fettling maintenance and heat preservation of the converter can be achieved, heat preservation can be achieved when the converter is shut down, and the converter can be used in front of and behind the converter. The heat preservation device is simple in structure, easy to manufacture, reliable to use and capable of being used for heat preservation during fettling of the steelmaking converter.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metallurgical equipment technical field, further belongs to steelmaking converter equipment technical field, and specifically relates to a simple structure, easy to make, reliable steelmaking converter repair furnace heat preservation device. BACKGROUND

[0002] In the converter steelmaking production process, the converter as the key equipment in the smelting process is composed of the converter main body and the furnace lining, and the furnace lining is built with refractory materials. In the converter service process, the converter main body equipment is high-temperature container structure steel, and the service period is relatively long. And under the comprehensive action of chemical corrosion, high-temperature heat flow, mechanical scouring, rapid cooling and rapid heating, the local refractory material is easy to erode seriously, which affects the service life of the furnace lining. In order to ensure the safe operation of the converter in each service period, when the furnace lining has erosion and falling, the repair sand is used for repair maintenance. The core of the repair sand maintenance of the furnace lining is high-temperature fast repair and sintering. The data shows that in the repair maintenance process, the heat loss of the converter port accounts for 90% of the whole heat loss, and whether the heat preservation measures of the converter port are appropriate directly affects the repair quality and sintering temperature, and further affects the economic and technical indexes of the converter. At present, the repair maintenance operation of the converter has the problem of fast heat dissipation of the converter port because of the lack of good heat preservation measures. After the repair is completed, the furnace wall temperature measured by the infrared temperature measuring equipment is about 600 DEG C, which violates the principle of high-temperature fast repair of the repair, and leads to the extension of the sintering time of the repair and the collapse of the repair material. Therefore, the research and development of a simple structure, easy to make, reliable steelmaking converter repair furnace heat preservation device is the key to solve this problem. CONTENT OF THE UTILITY MODEL

[0003] The utility model is simple in structure, easy to make and reliable in use.

[0004] The utility model discloses a simple structure, easy to make, reliable steelmaking converter repair furnace heat preservation device.

[0005] The utility model is composed of a support frame, a square hole for forklift slotted teeth to enter and exit, a thermal insulation cover, a furnace mouth supporting foot, and a counterweight steel billet; a square hole for forklift slotted teeth to enter and exit is provided at the lower part of the rear end frame of the support frame, which is convenient for a forklift to reverse the device; the thermal insulation cover is placed on the furnace mouth for furnace repair, thereby reducing heat dissipation at the furnace mouth; an auxiliary combustion oxygen supply hole is provided at the middle and lower part of the thermal insulation cover, thereby achieving the purpose of high-temperature rapid repair by supplying oxygen to assist combustion; furnace mouth supporting feet are provided at the lower bottom surface of the outer circle of the thermal insulation cover, and the furnace mouth supporting feet are placed on the lower edge of the inner layer of the furnace mouth, thereby ensuring that the device is reliable in use; a counterweight steel billet is provided on the lower frame at the rear end of the support frame, thereby moving the center of gravity of the device backward, thereby ensuring that the support frame and the thermal insulation cover remain stable at the same time during transportation.

[0006] The utility model furnace repair work flow is as follows:

[0007] 1. Add sand to the converter;

[0008] 2. Shake the furnace to spread the filling sand to the predetermined position and then shake the furnace to around ±90°;

[0009] 3. Use a forklift to transport the insulation cover and place it on the furnace mouth, with the furnace mouth support legs placed on the lower edge of the inner layer of the furnace mouth;

[0010] 4. Insert the oxygen supply tube into the auxiliary combustion oxygen supply hole to assist in oxygen supply;

[0011] 5. When the sintering time is up, remove the oxygen supply pipe to stop the oxygen supply, and use a forklift to remove the insulation cover;

[0012] 6. Check that the sintering condition of the supplementary sand meets the requirements and then resume normal production.

[0013] This utility model facilitates maintaining a high temperature for the converter lining during repair and maintenance, achieving the principle of high-temperature, rapid repair of converter repair and maintenance. After use, the converter wall temperature can be maintained near 1100°C during repair, achieving high-quality sintering of the repair sand and preventing sand collapse. Furthermore, it provides insulation for both repair and maintenance and during shutdown. It can be used both in front of and behind the converter, achieving energy conservation, environmental protection, and cost savings.

[0014] The utility model has the advantages of simple structure, easy manufacture and reliable use, and can be used for heat preservation during the steel-making converter repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 for Figure 1 Left side view;

[0017] Figure 3 for Figure 1 Schematic diagram from the right side;

[0018] Figure 4 It is the schematic view of the heat preservation cover of the utility model.

[0019] In the drawing: 1-support frame, 2-fork truck tooth insertion in and out square hole, 3-heat preservation cover, 31-bottom plate, 32-surrounding edge cylinder, 33-reinforcing rib plate, 34-heat preservation refractory material, 35-oxygen supply hole of auxiliary combustion, 36-furnace mouth support foot mounting hole, 4-furnace mouth support foot, 5-counterweight steel billet. DETAILED DESCRIPTION

[0020] The utility model is further described below in combination with the drawings, but does not limit the utility model in any way, and any transformation based on the teaching of the utility model falls within the protection scope of the utility model.

[0021] As Figures 1 to 4 Indicated, the utility model includes support frame 1, fork truck tooth insertion in and out square hole 2, heat preservation cover 3, furnace mouth support foot 4, counterweight steel billet 5, the support frame 1 after end frame lower part sets up fork truck tooth insertion in and out square hole 2, the support frame 1 before end sets up heat preservation cover 3, the support frame 1 after end lower part frame sets up counterweight steel billet 5, the heat preservation cover 3 outer circle lower bottom surface place sets up furnace mouth support foot 4, the furnace mouth support foot 4 is solidly connected with support frame 1 and heat preservation cover 3, the heat preservation cover 3 middle lower part sets up auxiliary combustion oxygen supply hole, the diameter of heat preservation cover 3 is adapted to converter furnace mouth size.

[0022] The support frame 1 is made of I-shaped steel, and the size is adapted to the diameter of the heat preservation cover 3.

[0023] The heat preservation cover 3 is welded with the support frame 1.

[0024] The length of the furnace mouth support foot 4 before end exceeding the heat preservation cover 3 section is 250mm.

[0025] The furnace mouth support foot 4 is 165x165x1000mm square billet, and is welded with the support frame 1 and the heat preservation cover 3.

[0026] The counterweight steel billet 5 is 165x165mm square billet, and the length is adapted to the width of the support frame 1, and is welded with the support frame 1.

[0027] The heat preservation cover 3 comprises a bottom plate 31, a surrounding edge cylinder 32, a reinforcing rib plate 33, a heat preservation refractory 34, an auxiliary combustion oxygen supply hole 35, and a furnace mouth supporting leg mounting hole 36.

[0028] The height of the surrounding edge cylinder 32 is 90-110 mm.

[0029] The height of the reinforcing rib plate 33 is 50-70 mm.

[0030] The diameter of the auxiliary combustion oxygen supply hole 35 is 50-70 mm.

[0031] The working principle and working process of the utility model are as follows:

[0032] The rear end frame lower part of the supporting frame 1 is provided with a forklift tooth entry and exit square hole 2, so that the forklift can conveniently carry the device; the heat preservation cover 3 is covered on the furnace mouth to supplement the furnace and reduce the heat dissipation of the furnace mouth; the middle lower part of the heat preservation cover 3 is provided with the auxiliary combustion oxygen supply hole 35, so that the purpose of high-temperature rapid supplement is achieved through oxygen supply and combustion support; the outer circle lower bottom surface of the heat preservation cover 3 is provided with the furnace mouth supporting leg 4, the furnace mouth supporting leg 4 is placed on the lower edge of the inner layer of the furnace mouth, so that the device is reliable in use; the counterweight steel billet 5 is arranged on the rear end lower frame of the supporting frame 1, so that the center of gravity of the device is moved backward, and the stability of the supporting frame 1 and the heat preservation cover 3 during the carrying process is ensured.

[0033] The furnace supplement working process of the utility model is as follows:

[0034] 1. The converter is added with furnace supplement sand;

[0035] 2. The furnace is shaken to shake the furnace supplement sand to the predetermined position and shake the furnace to about ±90°;

[0036] 3. The forklift is used to carry the heat preservation cover 3 and cover the furnace mouth, and the furnace mouth supporting leg 4 is placed on the lower edge of the inner layer of the furnace mouth;

[0037] 4. The oxygen supply pipe is inserted into the auxiliary combustion oxygen supply hole 35 to assist oxygen supply;

[0038] 5. When the furnace supplement sintering time is reached, the oxygen supply pipe is removed to stop oxygen supply, and the forklift is used to remove the heat preservation cover 3;

[0039] 6. After the furnace supplement sand sintering condition is checked and the requirement is met, normal production is resumed.

Claims

1. A steelmaking converter heat preservation device, comprising a support frame (1), a forklift slotting square hole (2), a heat preservation cover (3), a furnace mouth support foot (4), and a counterweight steel billet (5), characterized in that: A forklift slotting square hole (2) is provided at the lower portion of the rear end frame of the support frame (1); a heat preservation cover (3) is provided at the front end of the support frame (1); a counterweight steel billet (5) is provided on the lower portion of the rear end frame of the support frame (1); a furnace mouth support foot (4) is provided at the lower bottom surface of the outer circle of the heat preservation cover (3); the furnace mouth support foot (4) is fixedly connected to the support frame (1) and the heat preservation cover (3); an auxiliary combustion oxygen supply hole is provided at the middle and lower portion of the heat preservation cover (3); the diameter of the heat preservation cover (3) is adapted to the size of the converter furnace mouth.

2. The steelmaking converter heat preservation device according to claim 1 is characterized in that: The support frame (1) is made of I-steel, and its size is adapted to the diameter of the insulation cover (3).

3. The steelmaking converter heat preservation device according to claim 1 is characterized in that: The thermal insulation cover (3) is welded to the support frame (1).

4. The steelmaking converter heat preservation device according to claim 1 is characterized in that: The length of the front end of the furnace mouth supporting leg (4) extending beyond the insulation cover (3) is 250 mm.

5. The steelmaking converter heat preservation device according to claim 1, characterized in that: The furnace mouth support leg (4) is a 165×165×1000 mm square billet and is welded to the support frame (1) and the insulation cover (3).

6. The steelmaking converter heat preservation device according to claim 1, characterized in that: The counterweight steel billet (5) is a 165×165 mm square billet, the length of which is adapted to the width of the support frame (1), and is welded to the support frame (1).

7. The steelmaking converter heat preservation device according to claim 1 is characterized in that: The thermal insulation cover (3) includes a bottom plate (31), a surrounding cylinder (32), a reinforcing rib (33), a thermal insulation refractory material (34), an auxiliary combustion oxygen supply hole (35), and a furnace mouth support leg mounting hole (36); a surrounding cylinder (32) is provided on the end surface of the bottom plate (31); a reinforcing rib (33) and a thermal insulation refractory material (34) are sequentially provided between the end surface of the bottom plate (31) and the surrounding cylinder (32); an auxiliary combustion oxygen supply hole (35) is provided in the middle and lower part of the bottom plate (31); the auxiliary combustion oxygen supply hole (35) passes through the thermal insulation refractory material (34); a furnace mouth support leg mounting hole (36) is provided at the lower bottom surface of the outer circle of the bottom plate (31) and the surrounding cylinder (32); the furnace mouth support leg mounting hole (36) passes through the thermal insulation refractory material (34).

8. The steelmaking converter heat preservation device according to claim 7, characterized in that: The height of the surrounding cylinder (32) is 90 to 110 mm.

9. The steelmaking converter heat preservation device according to claim 7, characterized in that: The height of the reinforcing rib (33) is 50 to 70 mm.

10. The steelmaking converter heat preservation device according to claim 7, characterized in that: The diameter of the auxiliary combustion oxygen supply hole (35) is ∮50~70mm.

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