A waste steel roasting device for a blast furnace tapping position

Abstract

The utility model discloses a kind of waste steel roasting devices of blast furnace tapping position, it is related to steel processing technical field;And the utility model includes blast furnace iron channel tapping position dust hood and ladle car, water-cooled pure oxygen combustion waste steel roasting system is provided between blast furnace iron channel tapping position dust hood and ladle car;Water-cooled pure oxygen combustion waste steel roasting system includes rack, flow guide tube, hydraulic cylinder, winch, steel wire rope, burner, pulley block and valve station, and ladle car is located below flow guide tube;Rack is fixedly arranged at the side of blast furnace iron channel tapping position dust hood, and flow guide tube is fixedly arranged at the bottom end of blast furnace iron channel tapping position dust hood;By being designed for iron channel tapping type blast furnace, the deficiency that this kind of form blast furnace cannot be matched with waste steel roasting device is made up;Adopt the form of pure oxygen combustion-supporting, flame temperature is high, gas utilization rate is high, waste steel can be rapidly heated;By being installed at blast furnace iron channel tapping position dust hood side, directly tapping after roasting ends, there is no waiting time, and heat loss is very small.

Description

Technical Field

[0001] This utility model relates to the field of steel processing technology, specifically to a scrap steel baking device at the blast furnace tapping position. Background Technology

[0002] With the increase in my country's steel reserves and scrap steel resources, and the prominent price advantage of scrap steel, my country's total scrap steel resources will be very abundant in the next 20 years. Compared with electric arc furnace steelmaking, my country's blast furnace-converter steelmaking accounts for a large proportion and has a cost advantage. Therefore, increasing the scrap steel ratio in converter steelmaking can improve the company's economic benefits, reduce environmental pollution and comprehensive energy consumption, and is a long-term development strategy for enterprises. Compared with iron ore, using 1 ton of scrap steel for steelmaking can reduce CO2 emissions by 1.6 tons, solid emissions by 3 tons, and save 1 ton of raw coal, reducing environmental pollution and comprehensive energy consumption, which has high economic and social benefits. In view of the above, increasing the scrap steel ratio is an inevitable trend, and scrap steel baking is one of the important and effective means to increase the scrap steel ratio; Increasing the scrap steel ratio by baking scrap steel inside the molten iron ladle is currently the most feasible, efficient, and shortest investment return method in the steelmaking process, and it is also a method that most steel companies are promoting and demonstrating. Most newly installed blast furnaces use the trough tapping method, making it relatively easy to add scrap steel baking equipment. These devices can generally be installed at the waiting area or along the route of molten iron transportation. However, there is still a large number of older blast furnaces in China that use the iron trough tapping method. These blast furnaces have problems such as limited on-site space, long offline baking waiting time, large heat loss, impact on molten iron transportation scheduling, and high cost of adding dust removal systems. There is no good solution to meet the scrap steel baking requirements. Utility Model Content

[0003] In order to solve the above problems, the purpose of this utility model is to provide a scrap steel baking device at the blast furnace tapping position.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a scrap steel baking device for blast furnace tapping iron position, including a dust removal hood for blast furnace iron trough tapping iron position and a ladle car, wherein a water-cooled pure oxygen combustion scrap steel baking system is provided between the dust removal hood for blast furnace iron trough tapping iron position and the ladle car; The water-cooled pure oxygen combustion scrap steel baking system includes a frame, a guide cylinder, a hydraulic cylinder, a winch, a wire rope, a burner, a pulley block, and a valve station, with the ladle car located below the guide cylinder; The frame is fixedly installed on one side of the dust collector at the iron tapping position of the blast furnace iron trough. The guide tube is fixedly installed at the bottom end of the dust collector at the iron tapping position of the blast furnace iron trough. The hydraulic cylinder, winch, burner, pulley block and valve station are assembled on the frame. One end of the wire rope is wound and fixed on the winch roller. The other end of the wire rope passes around the pulley block and is fixed to the piston end of the hydraulic cylinder. An oxygen lance is mounted on the burner. The burner and oxygen lance are fixedly installed in the middle of the wire rope. The oxygen lance passes through the dust collector at the iron tapping position of the blast furnace iron trough. The valve station is connected to the oxygen lance of the burner through a metal hose. The frame is equipped with a rotating system, which includes a motor, a slewing bearing, a reducer, and a gear set. The oxygen lance is mounted on the slewing bearing.

[0005] Preferably, the frame is provided with a heat insulation plate.

[0006] Preferably, the valve station includes a main pipeline, an oxygen valve group, a cooling water inlet valve group, a gas pipeline valve group, a cooling water return valve group, and a nitrogen pipeline valve group.

[0007] Preferably, the oxygen lance is made of 310S stainless steel and is equipped with a water-cooling jacket.

[0008] Preferably, the bottom of the oxygen lance is Z-shaped.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, the design for the iron trough tapping blast furnace makes up for the deficiency that this type of blast furnace cannot be equipped with a scrap steel baking device. 2. In this utility model, a pure oxygen-assisted combustion method is used, resulting in a high flame temperature and high gas utilization rate, which can rapidly heat up scrap steel. 3. In this utility model, by installing it next to the dust removal hood at the iron tapping position of the blast furnace iron trough, the iron can be tapped directly after baking, with no waiting time and minimal heat loss. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0011] Figure 1 This is a schematic diagram of the structure of a scrap steel baking device at the iron tapping position of a blast furnace according to the present invention.

[0012] Figure 2 This is a schematic diagram showing the oxygen lance of this utility model rotated to the center position.

[0013] Figure 3 This is a schematic diagram of the valve station structure of this utility model.

[0014] In the diagram: 1. Dust collector hood at the iron tapping point of the blast furnace iron trough; 2. Guide cylinder; 3. Ladle; 4. Ladle car; 5. Frame; 6. Hydraulic cylinder; 7. Winch; 8. Wire rope; 9. Burner; 91. Oxygen lance; 10. Pulley block; 11. Valve station. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Figure 1-3 As shown, this utility model provides a scrap steel baking device for the blast furnace tapping iron position, including a dust removal hood 1 for the blast furnace iron trough tapping iron position and a ladle car 4. A water-cooled pure oxygen combustion scrap steel baking system is provided between the dust removal hood 1 for the blast furnace iron trough tapping iron position and the ladle car 4. The water-cooled pure oxygen combustion scrap steel baking system includes a frame 5, a guide cylinder 2, a hydraulic cylinder 6, a winch 7, a wire rope 8, a burner 9, a pulley block 10, and a valve station 11. The ladle car 4 is located below the guide cylinder 2. The frame 5 is made of H-beam steel, which is structurally stable. The frame 5 is equipped with heat insulation plates. By installing heat insulation plates on the frame 5, the high temperature resistance of the frame 5 can be improved and the service life can be extended. The frame 5 is fixedly installed on one side of the dust collector hood 1 at the iron tapping position of the blast furnace iron trough. The guide cylinder 2 is fixedly installed at the bottom end of the dust collector hood 1 at the iron tapping position of the blast furnace iron trough. The hydraulic cylinder 6, winch 7, burner 9, pulley block 10, and valve station 11 are assembled on the frame 5. One end of the wire rope 8 is wound and fixed to the roller of the winch 7, and the other end of the wire rope 8 is wrapped around the pulley block 10 and fixed to the piston end of the hydraulic cylinder 6. An oxygen lance 91 is mounted on the burner 9. The oxygen lance 91 is made of 310S stainless steel. The oxygen lance 91, made of 310S stainless steel, can operate at high temperatures for a long time. The oxygen lance 91 is equipped with a water-cooling jacket. A water-cooled jacket is installed, which can cool the oxygen lance 91 through circulating water. The bottom of the oxygen lance 91 is Z-shaped. The Z-shape is designed so that the oxygen lance 91 can be inserted into the center area of ​​the molten iron ladle in the middle of the ladle car 4 for rapid heating during baking. The burner 9 and the oxygen lance 91 are fixed in the middle of the wire rope 8. By starting the winch 7, the winch 7 can raise and lower the oxygen lance 91 vertically through the wire rope 8, so that the oxygen lance 91 has the ability to raise and lower. The oxygen lance 91 passes through the dust collector hood 1 at the iron outlet of the blast furnace iron trough. The valve station 11 is connected to the oxygen lance 91 of the burner 9 through a metal hose. The valve station 11 can supply gas to the oxygen lance 91. With the action of the burner 9, combustion can be achieved. The frame 5 is equipped with a rotating system, which includes a motor, a slewing bearing, a reducer and a gear set. The oxygen lance 91 is mounted on the slewing bearing. By setting up the rotating system, the rotating system can control the rotation of the oxygen lance 91, so that the oxygen lance 91 has a rotating action.

[0017] Valve station 11 includes a main pipeline, an oxygen valve group, a cooling water inlet valve group, a gas pipeline valve group, a cooling water return valve group, and a nitrogen pipeline valve group.

[0018] Working principle: During operation, the ladle car 4 carries the ladle 3 filled with scrap steel to the bottom of the dust removal hood 1 at the iron tapping position of the blast furnace iron trough; The oxygen lance 91 is rotated to the center position by the rotation system, and the burner 9 is lowered to the baking position by the steel wire rope 8 and the hydraulic cylinder 6. The valve station 11 starts to supply gas, and the oxygen lance 91 is ignited for baking. After baking, burner 9 is raised by hydraulic cylinder 6 and rotated to the waiting position by the rotation system.

[0019] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0020] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A scrap baking device for blast furnace tapping iron position, comprising a dust removal hood (1) for blast furnace iron trough tapping iron position and an iron ladle car (4), characterized in that: A water-cooled pure oxygen combustion scrap steel baking system is installed between the dust removal hood (1) at the iron tapping position of the blast furnace iron trough and the ladle car (4); The water-cooled pure oxygen combustion scrap steel baking system includes a frame (5), a guide cylinder (2), a hydraulic cylinder (6), a winch (7), a wire rope (8), a burner (9), a pulley block (10), and a valve station (11). The ladle car (4) is located below the guide cylinder (2). The frame (5) is fixedly installed on one side of the dust collector (1) at the iron tapping position of the blast furnace iron trough. The guide cylinder (2) is fixedly installed at the bottom end of the dust collector (1) at the iron tapping position of the blast furnace iron trough. The hydraulic cylinder (6), winch (7), burner (9), pulley block (10) and valve station (11) are assembled on the frame (5). One end of the wire rope (8) is wound and fixed on the roller of the winch (7). The other end of the wire rope (8) passes around the pulley block (10) and is fixed to the piston end of the hydraulic cylinder (6). An oxygen lance (91) is mounted on the burner (9). The burner (9) and the oxygen lance (91) are fixedly installed in the middle of the wire rope (8). The oxygen lance (91) passes through the dust collector (1) at the iron tapping position of the blast furnace iron trough. The valve station (11) is connected to the oxygen lance (91) of the burner (9) through a metal hose. The frame (5) is equipped with a rotating system, which includes a motor, a slewing bearing, a reducer and a gear set, and the oxygen lance (91) is mounted on the slewing bearing.

2. The scrap baking device at the blast furnace tapping position as described in claim 1, characterized in that, The frame (5) is equipped with a heat insulation plate.

3. The scrap baking device at the blast furnace tapping position as described in claim 1, characterized in that, The valve station (11) includes a main pipeline, an oxygen valve group, a cooling water inlet valve group, a gas pipeline valve group, a cooling water return valve group, and a nitrogen pipeline valve group.

4. The scrap baking device at the blast furnace tapping position as described in claim 1, characterized in that, The oxygen lance (91) is made of 310S stainless steel and is equipped with a water-cooling jacket.

5. The scrap baking device at the blast furnace tapping position as described in claim 1, characterized in that, The bottom of the oxygen lance (91) is Z-shaped.

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