A metallurgical converter lance bonding material stripping device

Abstract

The utility model discloses a metallurgy is with blow smelting gun adhesive stripping device relates to metallurgical furnace kiln equipment technical field. The device includes two half annular scrapers symmetry hinged in blow smelting gun frame, and the inboard of scraper is inlaid hard alloy scraper blade, and the cutting edge and blow smelting gun surface form 10 degree-20 degree cutting angle, and the middle part of scraper is connected through spring gun frame, realizes self -adaptation and compaction. When blow smelting gun promotes, scraper blade automatically scrapes off surface molten metal adhesive, and scraper plate reversely opens and avoids when gun body drops. Adopt detachable YG8 hard alloy blade (blade thickness 2-3mm), solve the low efficiency of artificial cleaning, poor safety and joint gap residual problem, especially adapt to the high temperature operating environment of the oxygen lance of 6m long, and prevent gun body jam accident.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical furnace and kiln equipment technology, specifically to a metallurgical blowing lance adhesive stripping device. Background Technology

[0002] In metal smelting production, after high-pressure blowing lances operate, the molten metal (such as a mixture of copper, lead, and slag) adheres to the surface and cools to form a hard outer shell, tightly covering the lance body and moving parts (such as the connection of the telescopic sleeve). This can cause the oxygen lance to jam or even fall due to weightlessness (a case study in a copper smelter shows that the damage rate of seals in a Φ140×6000mm oxygen lance increased by 30% due to shell formation). Currently, there is a lack of dedicated cleaning equipment, relying on manual hammering, gas welding, and other methods. A single cleaning takes 2-4 hours, and workers face the risks of high-temperature radiation and flying metal debris. Manual operation is also insufficient to completely remove residues from joint gaps, and the hardened shell accelerates equipment wear and blocks exhaust pipes. Although automated cleaning technologies (such as rotating brush systems for spray lances) have been applied in other fields, metallurgical oxygen lances, due to their length ≥6m, large surface temperature gradient, and high hardness of the adhered materials, still lack suitable solutions, becoming a key bottleneck restricting continuous production. Utility Model Content

[0003] This utility model discloses a device for removing adhesive residues from a metallurgical blowing lance, in order to solve the current problem of difficulty in cleaning adhesive residues from the surface of an oxygen blowing lance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A metallurgical blowing lance adhesive stripping device includes two symmetrically arranged semi-annular scrapers, one end of which is hinged to the blowing lance frame and the other end abuts against the surface of the blowing lance; a spring is connected to the middle of the annular scraper, and the other end of the spring is fixed to the blowing lance frame.

[0006] The annular scraper is embedded with a carbide scraper blade at the end that contacts the blowing gun, and the cutting edge of the carbide scraper blade forms a cutting angle of 10°-20° with the surface of the blowing gun.

[0007] The carbide scraper blade is detachably fixed by bolts, and is made of YG8 carbide with a cutting edge thickness of 2-3mm.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] Taking the use of a metal smelting blowing lance in the metallurgical industry as an example, after a stage of metal smelting production is completed, when the blowing oxygen lance is lifted out of the furnace by the blowing oxygen lance lifting mechanism, the peeling device of this utility model closes and embraces the surface of the lance. With the help of the lifting force, the peeling device disperses and peels off the adhesive on the surface of the blowing oxygen lance, avoiding the accumulation and solidification of the adhesive to form a hard shell, which would restrict the movement of the blowing oxygen lance and affect its use. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram, 1-ring scraper, 2-blowing gun, 3-blowing gun holder, 4-carbide scraper blade, 5-spring. Detailed Implementation

[0012] Combined with appendix Figure 1 The embodiments of this utility model will be described in detail. This embodiment uses a copper smelting oxygen lance (Φ140×6000mm) as an example, but this utility model is also applicable to the cleaning of adhesives from other metallurgical smelting lances.

[0013] 1. Device Structure and Installation

[0014] like Figure 1 As shown, the stripping device is symmetrically installed on both sides of the blowing gun holder 3, and includes the following core components:

[0015] The two semi-annular scrapers 3 are made of high-temperature and wear-resistant steel plates (such as 1Cr18Ni9Ti stainless steel) to form a semi-annular structure, with a radius matching the outer diameter of the blowing gun 2 (R=70mm in the example). The two scrapers are hinged to the base of the blowing gun holder 3 by pins and can be opened and closed around the hinge point.

[0016] Carbide scraper blade 4: It is embedded in the inner contact end of the annular scraper 1 and can be detachably fixed by an M8 socket head cap screw. The blade material is YG8 carbide, the cutting edge thickness is 2.5mm (preferably 2-3mm), and after installation, its cutting edge forms a 15° cutting angle with the surface of the blowing gun 2.

[0017] Spring 5: Both ends are connected to the lug in the middle of the annular scraper 1 and the fixing lug of the blowing gun frame (3). High temperature resistant disc spring assembly is selected, and the preload is adjusted to 5-10kN to ensure that the scraper is always in close contact with the surface of the gun body.

[0018] 2. Workflow

[0019] Closed scraping stage: When the blowing process ends and the blowing lance 2 is vertically lifted out of the furnace by the lifting mechanism, the annular scraper 1 closes and holds the lance body under the action of the spring 5. During the lance body's ascent, the carbide scraper blade 4 continuously scrapes the surface adhesives (such as solidified copper slag mixture) at a cutting angle of 15°, and the peeling force is provided by the lance body's own weight.

[0020] Automatic avoidance phase: When the gun body descends, the adhesive residue layer applies a reverse thrust to the scraper, forcing the two semi-annular scrapers 1 to open outward around the hinge point, thus avoiding interference with the gun body's reset.

[0021] In addition, for materials with different hardness (such as lead slag with a hardness of HB150 and copper slag with a hardness of HB220), the cutting angle can be adjusted by adding or removing blade shims: 10° for high hardness (to enhance cutting force) and 20° for low hardness (to reduce wear).

[0022] When the cutting edge wears more than 0.5mm, remove the bolts and replace the blade. Each replacement takes ≤5 minutes.

Claims

1. A device for peeling off adhesive residue from a metallurgical blowing gun, characterized in that, It includes two symmetrically arranged annular scrapers (1), one end of which is hinged to the blowing gun frame (3) and the other end abuts against the surface of the blowing gun (2); a spring (5) is connected in the middle of the annular scraper (1), and the other end of the spring (5) is fixed to the blowing gun frame (3).

2. The metallurgical blowing lance adhesive stripping device as described in claim 1, characterized in that, The annular scraper (1) is inlaid with a carbide scraper blade (4) at the end that contacts the blowing gun (2). The cutting edge of the carbide scraper blade (4) forms a cutting angle of 10°-20° with the surface of the blowing gun (2).

3. The metallurgical blowing lance adhesive stripping device as described in claim 2, characterized in that, The carbide scraper blade (4) is detachably fixed by bolts. It is made of YG8 carbide and has a cutting edge thickness of 2-3mm.

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