Sequential ladle opening lifting type molten metal slag removal method and device

Abstract

According to the ladle-opening-following lifting type molten metal slag removing method and device, a body of the ladle-opening-following lifting type molten metal slag removing device is characterized in that an auxiliary working arm 4 is hinged to the front end of a main working arm 3 which is arranged beside a metal ladle 1 and driven by a walking mechanism 2, a transmission box 5 is fixedly connected to the front end of the auxiliary working arm 4, and a double-slag rake 6 is rotatably installed on the transmission box 5. According to the working principle, the double slag rakes are unfolded and moved to the innermost part of the wall of the inclined metal ladle (1), then immersed into metal slag or molten metal by a certain depth, and started to be folded to push and accept the slag until the two slag rakes close to and are folded at the opening of the metal ladle and form a closed slag container with the molten metal or the slag surface; the front end of the slag rake is driven to obliquely enter metal slag or molten metal, the walking mechanism retreats till the bottom of the slag rake is parallel to and makes contact with a metal ladle opening, the auxiliary working arm (4) shrinks, the double-slag rake (6) is driven to retreat, and the metal slag is pulled out of a metal ladle. The problems that in the previous slagging-off process, slag pushing and collecting are not good, the efficiency is too low, and too much molten metal is carried are effectively solved.

Description

Technical Field

[0001] The invention discloses a ladle-mouth-lifting molten metal slag cleaning method and device, which are mainly used for cleaning slag on the surface of molten metal in a ladle, and can also be used in other similar occasions. Background Art

[0002] The existing scraper technology uses a single scraper plate, which enters the molten metal to a certain depth and quickly removes the slag. Since the amount of slag carried is limited by the width of the slag plate and the loss of metal slag, not much metal slag is removed each time, and the efficiency is low, which can no longer meet the requirements of fast and efficient production. In addition, the scraper plate needs to be immersed in the molten metal to a certain depth, and a quick back scraping action is required, and the metal ladle needs to be tilted to the metal ladle first, and then the metal liquid level approaches or reaches the ladle mouth. There is also the problem of removing too much metal liquid, resulting in waste.

[0003] Furthermore, the slag removal speed of a single slag removal plate is relatively fast, which has a great impact on the ladle mouth and the slag removal equipment, thus affecting the life of the metal ladle and the slag removal equipment. Summary of the invention

[0004] The present invention provides a double slag rake to drive away slag and gather slag, and a molten metal slag cleaning method and device along the ladle mouth lifting type, the purpose of which is to effectively solve the problems of poor slag driving and gathering, low efficiency and excessive metal liquid carried in the previous slag removal process.

[0005] The specific technical solutions of the present invention are as follows: A ladle mouth lifting type molten metal slag cleaning method and device, comprising a ladle (1), a walking mechanism (2), a main working arm (3), an auxiliary working arm (4), a transmission box (5) and a double slag rake (6). The molten metal slag cleaning device is arranged beside the ladle (1), the front end of the main working arm (3) driven by the walking mechanism (2) is hingedly connected to the auxiliary working arm (4), the front end of the auxiliary working arm (4) is fixedly connected to the transmission box (5), and the double slag rake (6) is rotatably mounted on the transmission box (5); Specific method: the double slag rakes (6) are unfolded and moved to the vicinity of the innermost wall of the inclined metal ladle (1), immersed in the metal slag or molten metal to a certain depth, and begin to close to drive out the slag and gather the slag. When the slag rakes move to the metal ladle mouth, the two slag rakes are close to each other to a certain distance and form a closed U-shaped slag container with the metal liquid or slag surface. Then, the auxiliary working arm (4) is continuously tilted to drive the front end of the slag rake to obliquely enter the metal slag or molten metal, the walking mechanism is continuously retreated, and the main working arm (3) is continuously lifted until the bottom of the slag rake is parallel to and in contact with the metal ladle mouth, the auxiliary working arm (4) is retracted, driving the double slag rakes (6) to retreat, and the metal slag is scraped out of the metal ladle.

[0006] Compared with the prior art, the present invention has the following positive effects: (1) the single slag stripping plate with slag is replaced by a double slag rake to remove slag, and the length of each slag rake is close to the inner radius of the metal ladle, so that the whole area of ​​the metal liquid surface is removed, the efficiency is greatly improved, and the slag stripping time is greatly reduced; (2) the original slag stripping machine with a single slag rake and fast slag stripping is replaced by a double slag rake to slowly remove the slag and gather the slag, and then slowly lift the filter slag along the ladle mouth, and the metal liquid is automatically filtered out, so the metal liquid carried by the slag stripping is greatly reduced, and the impact on the metal ladle mouth and equipment is also reduced; (3) the present invention The invention adopts double slag rakes to drive away slag and slag accumulation. The double slag rakes that reach the ladle wall form a U-shaped slag accumulation container, so that the molten metal does not need to be flush or close to the ladle mouth, but a certain distance is left to avoid the molten metal overflowing; (4) The box-type structure formed by the two slag rakes forms a slag container with the molten metal or slag surface. The walking mechanism continuously retreats and the telescopic arm continuously tilts downward until the telescopic arm is parallel to the ladle mouth. Through its contraction, all the slag accumulation in the slag rake is scraped out without leakage; (5) The molten metal is lifted along the ladle mouth to remove the slag. The operation is simple, convenient for manual operation, and suitable for automatic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the partial structure of a ladle-mouth lifting type molten metal slag cleaning device of the present invention and a relative position relationship with the metal ladle; Figure 2 for Figure 1 A schematic diagram of a connection between the main working arm (3), the auxiliary working arm (4) and the tilting cylinder (7) in the illustrated embodiment; Figure 3 It is a schematic diagram of the movement process in the main viewing direction of a method for removing slag from molten metal along the ladle mouth of the present invention; Figure 4 for Figure 3 The schematic diagram of the movement process of the double slag rake (6) in the top view of a method for removing slag from the ladle opening of the molten metal in the embodiment shown. Figure 4-1 The slag rake is at the innermost of the metal bag, and the back limits of the two slag rakes are close to the schematic diagram; Figure 4-2 Two slag rakes drive and gather the slag until they form a straight line; Figure 4-3 It is a schematic diagram of two slag rakes closing together to gather slag until they reach a certain distance to form a slag container; Figure 5 This is the front view of the slag rake. The main parts in the figure are as follows: (1) metal bag (2) walking mechanism (3) main working arm (4) auxiliary working arm (5) transmission box (6) double slag rake (7) tilting cylinder. Implementation The technical solution of the present invention is described in detail below with reference to the accompanying drawings and an embodiment shown in FIG. Example

[0009] A method and device for cleaning slag from a ladle opening, comprising a walking mechanism (omitted in the present invention but not shown in the figure) that can be lifted, a lifting mechanism and a slewing mechanism that cannot be lifted, and a main working arm (3), a secondary working arm (4), a transmission box (5), and a double slag rake (6) according to the present invention.

[0010] In this embodiment, the slag cleaning mechanism along the bag mouth is specifically: a double slag rake (6) is fixed on a rotating shaft below a transmission box (5), the transmission box (5) is fixedly connected to the front end of the auxiliary working arm (4), the rear end of the auxiliary working arm (4) is hinged to the main working arm (3), the rear end of the auxiliary working arm (4) is hinged to the front end of a tilting cylinder (7), and the rear end of the tilting cylinder (7) is fixed to the main working arm (3);

[0011] When the ladle opening cleaning mechanism is working, the double slag rakes are unfolded to the limit of the back of the straight plate slag rake, move to the innermost wall of the inclined metal ladle (1), immerse in the metal slag or molten metal to a certain depth, and begin to close to drive out the slag and gather the slag. When reaching the ladle opening, the two slag rakes close to a certain distance and form a closed U-shaped slag container with the molten metal or slag surface. Then, the auxiliary working arm (4) continuously tilts downward, driving the front end of the slag rake to tilt and immerse in the metal slag or molten metal. At the same time, the walking mechanism continuously retreats and the working arm (3) continuously rises until the bottom of the slag rake is parallel to and in contact with the ladle opening. The auxiliary working arm (4) shrinks, driving the double slag rakes (6) to retreat, and the metal slag is scraped out of the ladle. The whole process is slow, so the impact on the ladle and the stirring of the molten metal are small, which greatly improves the efficiency of the accumulation of slag, the filtration of molten metal, and the scraping of slag.

[0012] As a further improvement of the present invention, in order to prevent the front end of the slag rake from being submerged in the molten metal and causing slag to escape when the front end of the slag rake is tilted downward, the front part of the double slag rake (6) is raised and changed from a rectangular shape to a trapezoidal shape. If the molten metal temperature is high and the slag rake is easily eroded, the slag rake can be tilted a small amount continuously while the slag rake is continuously retreated, and the bottom of the front half of the slag rake is always immersed in the molten metal or slag layer to prevent the slag from flowing out, until the slag rake is parallel to and in contact with the ladle opening, and the retractable auxiliary working arm (4) is slowly retracted to allow the molten metal to flow out and the slag to be scraped out.

[0013] Embodiment 2

[0014] A method for removing slag from a metal ladle that is lifted along the ladle opening, which can also use a non-telescopic fixed auxiliary working arm. The specific implementation method is as follows: a double slag rake is unfolded and moved to the vicinity of the innermost wall of an inclined metal ladle (1), immersed in the metal slag or molten metal to a certain depth, and begins to close and remove the slag. When it reaches the ladle opening, the auxiliary working arm (4) continuously tilts downward, driving the front end of the slag rake (6) to obliquely enter the metal slag or molten metal. At this time, the walking mechanism continuously retreats and the main working arm continuously rises, so that the bottom of the straight plate slag rake is always immersed in the metal molten metal or the liquid slag surface, until the bottom of the slag rake is parallel to and in contact with the ladle opening, and then the main working arm (3) is continuously lifted, and the walking mechanism continuously retreats, so that the bottom of the slag rake follows the ladle opening to remove the metal slag from the metal ladle.

[0015] Embodiment 3 As a further improvement of the present invention, in order to prevent the front end of the slag rake from being submerged in the molten metal and causing slag to escape when the front end of the metal ladle mouth of the slag rake tilts downward, the front part of the double slag rake (6) is raised and changed from a rectangular shape to a trapezoidal shape.

Claims

1. A method and device for removing slag from molten metal by lifting along the ladle mouth, characterized in that: A molten metal slag removal device is arranged next to the metal ladle (1), on which a walking mechanism (2), a main working arm (3), an auxiliary working arm (4), a transmission box (5), a double slag rake (6) and a tilting cylinder (7) are provided; The front end of the main working arm (3) is hinged with a retractable auxiliary working arm (4), the front end of the auxiliary working arm (4) is fixedly connected to a transmission box (5), and the transmission box (5) is rotatably connected to a double slag rake (6).

2. The device according to claim 1, wherein the double slag rake (6) is a double straight plate slag rake.

3. The device according to claim 1, wherein the upper portion of the double slag rake (6) is an inclined surface rising from the front end of the slag rake to the rear.

4. The device as claimed in claim 1, wherein the rear end of the auxiliary working arm (4) is hinged to the front end of the tilting cylinder (7), and the rear end of the tilting cylinder (7) is fixed to the main working arm (3).

5. The slag cleaning method implemented by the device as described in claim 1 is specifically characterized in that: the double slag rakes are unfolded and moved to the vicinity of the innermost wall of the inclined metal ladle (1), and then immersed in the metal slag or molten metal to a certain depth, and begin to close to drive out and gather slag. When the slag reaches the ladle mouth, the slag is located in the space formed by the two straight slag rakes and the metal liquid or slag. Then the auxiliary working arm (4) tilts downward, driving the front end of the slag rake to obliquely enter the metal slag or molten metal, and the walking mechanism retreats until the bottom of the slag rake is parallel to and in contact with the ladle mouth, and the auxiliary working arm (4) contracts the belt The moving double slag rake (6) moves backward to scrape the metal slag out of the metal ladle or the auxiliary working arm does not retract, the walking mechanism (2) moves backward, the main working arm (3) is continuously lifted, and the auxiliary working arm (4) is continuously tilted downward to keep the bottom of the slag rake in contact with the molten metal and slag and prevent the slag accumulated in the slag rake from flowing out, until the bottom of the slag rake is parallel to the ladle opening and a slag container is formed between the two slag rakes and the ladle opening. At this time, the walking mechanism (2) moves backward continuously, the main working arm (3) is continuously lifted, and the auxiliary working arm (4) is continuously tilted downward to keep the bottom of the slag rake in contact with the ladle opening until the slag rake leaves the metal ladle and scrapes the slag out.

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