Slagging-off rake for molten iron desulfurization and slagging-off

Abstract

The utility model discloses a drossing rake for molten iron desulphurization drossing, which comprises a rake body and a rake head, and is characterized in that the rake head comprises a fixed part and a working part, the section of the fixed part is rectangular, and one side of the section of the working part is wavy; the fixing part is connected with the rake body through a connecting shaft; an air inlet connected with a purging air pipe is formed in the fixed part, and a purging air outlet is formed in the position, corresponding to the wave trough of the section of the working part, of the lower part of the fixed part; the purging air outlet is communicated with the air inlet through an air conveying channel in the fixed part; the blowing device further comprises a connecting shaft sleeve matched with the connecting shaft in a sliding connection mode, the connecting shaft sleeve is rotationally arranged on the fixing table, a blowing air pipe shaft sleeve is arranged above the connecting shaft sleeve, and the blowing air pipe is connected into the blowing air pipe shaft sleeve in a sliding mode. According to the structure, the risk of slag bonding can be reduced, slag attached to the surface of the rake head can be purged in a slag skimming gap, cleaning is timely, and the slag skimming effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of KR method molten iron desulfurization devices, in particular to a slag rake used for molten iron desulfurization. Background Art

[0002] KR desulfurization is mechanical stirring desulfurization, which is to insert a cross-shaped stirring paddle formed by casting refractory materials into a certain amount of molten iron after baking, so that the molten iron produces a vortex, and then add a certain amount of desulfurizer into the molten iron vortex, so that the desulfurizer and the sulfur in the molten iron undergo a desulfurization reaction during continuous stirring. In this method, in addition to the stirring equipment, the slag removal device is also an important component.

[0003] The existing slag removal device is mainly a slag removal rake, including a rake body and a rake head. The rake body drives the rake head to extend and retract, thereby realizing the slag removal function. The existing rake head is a heat-resistant steel plate, which is movably set on the rake body. The existing rake head structure sticks to slag quickly, which is not conducive to continuous operation and requires manual cleaning regularly. After the KR rake head sticks to slag iron, it needs to be cooled and then manually cleaned with a pneumatic pick, which is labor-intensive and poses safety risks. In addition, after the KR rake head sticks to slag iron, it will cause the slag removal surface to be uneven, and there will be serious iron in the slag removal or the slag removal will not be clean. Utility Model Content

[0004] The utility model aims to provide a rake head for slagging during molten iron desulfurization to solve the problems in the prior art.

[0005] The utility model is realized by the following technical scheme: a slag rake for molten iron desulfurization slag removal, comprising a rake body and a rake head, characterized in that: the rake head comprises a fixed part and a working part, the cross section of the fixed part is rectangular, and one side of the cross section of the working part is wavy;

[0006] The fixing part is connected to the rake body through a connecting shaft;

[0007] An air inlet connected to the purge air duct is arranged on the fixed part, and a purge air outlet is arranged at a position corresponding to the trough of the cross section of the working part at the lower part of the fixed part; the purge air outlet is connected to the air inlet through the air delivery channel in the fixed part;

[0008] It also includes a connecting sleeve that is slidably matched with the connecting shaft. The connecting sleeve is rotatably arranged on a fixed platform. A purge air duct sleeve is arranged above the connecting sleeve. The purge air duct is slidably connected in the purge air duct sleeve.

[0009] Furthermore: a fixing seat is arranged on the fixing platform, a rotating shaft is arranged on the connecting sleeve, and the rotating shaft is rotationally matched with the hole on the fixing seat.

[0010] Further: a connecting plate is provided at the end of the connecting shaft, and the connecting plate is connected to the fixing part by bolts.

[0011] Furthermore: the purge air duct is connected to a high-pressure air source.

[0012] The beneficial effects of the utility model are as follows: in the utility model structure, the working surface of the working part of the rake head is wavy, which can reduce the risk of slag sticking; at the same time, a purge air outlet is added to the rake head, and the slag attached to the surface of the rake head can be purged during the gap of slag scraping, so that the cleaning is timely, the frequency of manual cleaning is reduced, and at the same time the smoothness of the rake head surface is improved, and the slag scraping effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the main structure of the rake head part;

[0015] Figure 3 yes Figure 2 A-direction cross-sectional structural diagram of the working part;

[0016] Figure 4 yes Figure 2 Schematic diagram of the D-axis cross-sectional structure.

[0017] List of reference numerals: 1 is a rake head, 11 is a fixing part, 12 is a working part, 111 is an air inlet, 112 is a purge air outlet, 113 is an air supply channel, 2 is a connecting shaft, 21 is a connecting plate, 3 is a purge air duct, 4 is a connecting shaft sleeve, 5 is a fixing platform, 6 is a purge air duct shaft sleeve, and 7 is a fixing seat. DETAILED DESCRIPTION

[0018] like Figure 1-4 The utility model is a slag rake for molten iron desulfurization, comprising a rake body ( Figure 1 The left side (not shown) and the rake head 1; the rake head is used for scraping, and includes a fixed part 11 and a working part 12 connected in one piece, the fixed part 11 is located on the upper side and its cross section is rectangular, the fixed part mainly serves to connect and conduct gas, the working part 12 is located on the lower side and its cross section is approximately rectangular, but one side of the working surface is wavy or sinusoidal (such as Figure 3As shown); the rake body is used to drive the rake head to extend or lift, so as to achieve slag removal. This part of the structure is the same as the prior art and will not be described in detail. The fixed part 11 is connected to the rake body through the connecting shaft 2, so as to realize the transmission function of the rake body and the rake head. An air inlet 111 connected to the purge air duct 3 is provided on the fixed part 11, and the connection is a hard connection; a purge air outlet 112 is provided at a position corresponding to the trough of the cross section of the working part at the lower part of the fixed part 11; the purge air outlet is connected to the air inlet 111 through an air supply channel 113 in the fixed part 11. It also includes a connecting sleeve 4 that is slidably matched with the connecting shaft 2, and the connecting sleeve 4 is rotatably set on the fixed platform 5. A purge air duct sleeve 6 is fixedly arranged above the connecting sleeve 4, and the purge air duct 3 is slidably connected in the purge air duct sleeve 6.

[0019] Preferably, two groups of fixing seats 7 are arranged on the fixing platform 5, and rotating shafts are arranged on both sides of the connecting sleeve 4, and the rotating shafts are rotatably matched with the holes on the fixing seats.

[0020] Preferably, a connecting plate 21 is provided at the end of the connecting shaft 2, and the connecting plate 21 is connected to the fixing portion 11 by bolts, and is integrally connected to the connecting shaft or fixed by welding or threaded connection.

[0021] Preferably, the purge air duct 3 is connected to a high-pressure air source.

[0022] The working process of the utility model structure is as follows:

[0023] 1. After the desulfurization of molten iron is completed, slowly shake the molten iron tank out of the zero position, tip the molten iron tank over until the molten iron slag surface flows to the iron outlet of the molten iron tank, and a small amount of molten iron slag after desulfurization overflows from the iron outlet of the molten iron tank. Because the molten iron slag is sandy and loose, and has poor fluidity, it is required that the slag cannot be discharged from the iron. At this time, stop tipping.

[0024] 2. Start the slag rake. According to the thickness of the slag in the molten iron, drive the rake head up and down and forward and backward through the rake body. According to the inclination angle of the molten iron ladle, drive the rake head forward into the molten iron ladle through the connecting shaft, and adjust the angle of the rake head. Lower the working part of the rake head between the molten iron and the slag, retract the connecting shaft backwards, and scrape out the slag in the molten iron. Repeat the operation to clean the slag in the molten iron ladle according to the process requirements.

[0025] 3. Before slagging, confirm the air inlet pressure (required to be ≥0.6Mpa), manually control the air inlet switch valve opening between 20%-50%, and adjust it in time according to the slag collapse and molten iron splashing. The air outlet is at the trough of the slagging plate to prevent the air outlet from being blocked by slag. Prevent blockage and do not affect slag collapse.

[0026] 4. After the scraping is completed, return the scraper rake to the cleaning position, adjust the position of the rake head downward by the handle, ensure that there is no safety hazard during blowing, check that there is no flammable material around the scraper rake, and check that the air intake source pressure is ≥0.6MPa, control the opening of the air intake source control valve between 80%-100%, blow hard for 1-3 minutes, and close the control valve after the sticky slag on the scraper plate is blown away.

[0027] 5. Re-adjust the scraper rake to the appropriate angle, return the scraper rake to the stop position, and wait for the next use.

Claims

1. A slag rake for molten iron desulfurization, comprising a rake body and a rake head (1), characterized in that: The drag head comprises a fixing portion (11) and a working portion (12); the fixing portion (11) has a rectangular cross section, and one side of the working portion (12) has a wavy cross section; The fixing portion (11) is connected to the rake body via a connecting shaft (2); An air inlet (111) connected to a purge air duct (3) is provided on the fixed portion (11), and a purge air outlet (112) is provided at a position of the lower portion of the fixed portion (11) corresponding to a trough of the cross section of the working portion; the purge air outlet is connected to the air inlet (111) via an air delivery channel (113) in the fixed portion (11); It also comprises a connecting shaft sleeve (4) which is slidably engaged with the connecting shaft (2); the connecting shaft sleeve (4) is rotatably arranged on a fixed platform (5); a purge air duct shaft sleeve (6) is arranged above the connecting shaft sleeve (4); and the purge air duct (3) is slidably engaged in the purge air duct shaft sleeve (6).

2. A slag rake for molten iron desulfurization according to claim 1, characterized in that: A fixing seat (7) is arranged on the fixing platform (5), and a rotating shaft is arranged on the connecting shaft sleeve (4), wherein the rotating shaft is rotationally matched with a hole on the fixing seat.

3. A slag rake for molten iron desulfurization according to claim 1, characterized in that: A connecting plate (21) is provided at the end of the connecting shaft (2), and the connecting plate (21) is connected to the fixing portion (11) via bolts.

4. A slag rake for molten iron desulfurization according to claim 1, characterized in that: The purge air duct (3) is connected to a high-pressure air source.

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