CN217829111U

CN217829111U - Casting runner type filter

Info

Publication number: CN217829111U
Application number: CN202222757151.4U
Authority: CN
Inventors: 李化坤; 崔彬; 逯红果; 董骞骞; 马中钢; 刘洪平; 赵国才; 张光柱; 宋莉莉; 范英慧
Original assignee: SHANDONG ROITIE NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD
Current assignee: SHANDONG ROITIE NEW MATERIAL SCIENCE AND TECHNOLOGY CO LTD
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2022-11-18
Anticipated expiration: 2032-10-20

Abstract

The utility model discloses a chute formula filter is used in pouring belongs to chute formula filter technical field. The technical scheme is as follows: the filter comprises a filter body, wherein the filter body is provided with a first flow groove and a second flow groove which are communicated, a first filtering mechanism is arranged at the joint of the first flow groove and the second flow groove, the first filtering mechanism comprises a first filtering net and a second filtering net which are vertically arranged, the first filtering net is positioned above the second filtering net, and the aperture of the first filtering net is smaller than that of the second filtering net; a second filtering mechanism is arranged in the second flow groove, the second filtering mechanism comprises a third filtering net and a fourth filtering net which are vertically arranged, the third filtering net is positioned above the fourth filtering net, and the aperture of the third filtering net is larger than that of the fourth filtering net; the outlet of the filter body is positioned in the second trough and along the flow direction of the molten steel, and the second filtering mechanism is positioned between the first filtering mechanism and the outlet. The utility model discloses when guaranteeing the filter effect, pouring efficiency has still been improved.

Description

Casting runner type filter

Technical Field

The utility model relates to a chute formula filter technical field, concretely relates to chute formula filter is used in pouring.

Background

At present, in the pouring process of 500kg, 1500kg, 2500kg and above large-scale vacuum induction melting furnaces, because the molten steel capacity is big and the pouring time is short in the crucible, if directly pour the molten steel into the shunt, can cause a large amount of splash of molten steel, cause the wasting of resources, see the cell type shunt that utility model patent CN204276882U disclosed. Therefore, a slotted filter is often installed in the upper portion of the slotted splitter during the casting process. As shown in fig. 1, the conventional flow channel type filter includes a filter body, a flow channel is provided in the filter body, an outlet is provided at one end of the flow channel, and a zirconia filter screen is provided at the outlet. The flow channel type filter mainly plays two roles: 1. part of molten steel is cached, so that the molten steel can flow into the lower trough-shaped flow divider at a slow flow speed, and the splashing of the molten steel is reduced; 2. the molten steel is filtered by the filter screen before flowing into the groove-shaped flow divider below through the outlet, so that impurities in the molten steel are filtered, and the metallurgical quality of the alloy ingot is improved.

However, as the capacity of the melting furnace increases, a runner type filter having a multi-layer filtration structure is required to improve the metallurgical quality of the surface of the alloy ingot, but the multi-layer filtration reduces the pouring rate of molten steel. Therefore, how to improve the pouring speed of the runner type filter and improve the pouring efficiency while adopting multilayer filtration is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the runner type filter for pouring is provided, and the pouring efficiency is improved while the filtering effect is ensured.

The technical scheme of the utility model is that:

the casting runner type filter comprises a filter body, wherein the filter body is provided with a first runner and a second runner which are communicated, a first filtering mechanism is arranged at the joint of the first runner and the second runner, the first filtering mechanism comprises a first filter screen and a second filter screen which are vertically arranged, the first filter screen is positioned above the second filter screen, and the aperture of the first filter screen is smaller than that of the second filter screen; a second filtering mechanism is arranged in the second flow groove, the second filtering mechanism comprises a third filtering net and a fourth filtering net which are vertically arranged, the third filtering net is positioned above the fourth filtering net, and the aperture of the third filtering net is larger than that of the fourth filtering net; the outlet of the filter body is positioned in the second launder, and the second filtering mechanism is positioned between the first filtering mechanism and the outlet along the flowing direction of the molten steel, so that the molten steel can be sequentially filtered by the two layers of the first filtering mechanism and the second filtering mechanism in the flowing process of the first launder and the second launder, and finally flows out through the outlet.

Wherein, "erect" means that the direction that first filter screen, second filter screen, third filter screen and fourth filter screen set up is perpendicular with the bottom surface of filter body for molten steel can filter molten steel when flowing through.

Preferably, the first filter screen, the second filter screen, the third filter screen and the fourth filter screen are all made of zirconium oxide filter screens.

Preferably, the first filter and the fourth filter have a pore size density of 80 to 120ppi, and the second filter and the third filter have a pore size density of 40 to 70ppi.

Preferably, the first and second launders are the same size.

Compared with the prior art, the utility model, following beneficial effect has:

the flow groove type filter of the utility model divides the flow groove of the existing flow groove type filter into two parts and is provided with two layers of filtering mechanisms, thereby effectively filtering large-size and small-size floating slag in molten steel, and improving the purity of the molten steel and the quality of cast ingots; and simultaneously, the utility model discloses a design the aperture density distribution of filter screen among first filter mechanism and the second filter mechanism, under the prerequisite of guaranteeing the filter effect, still improved filter speed to pouring efficiency has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a conventional flow channel type filter.

Fig. 2 is a schematic structural view of the flow channel type filter of the present invention.

Fig. 3 is a schematic structural diagram of the first filter mechanism of the present invention.

Fig. 4 is a schematic structural view of the second filtering mechanism of the present invention.

In the figure, 1, a filter body; 2. a first launder; 3. a second launder; 4. a first filtering mechanism; 401. a first filter screen; 402. a second filter screen; 5. a second filter mechanism; 501. a third filter screen; 502. a fourth filter screen; 6. and (7) an outlet.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.

Example 1

As shown in fig. 2 to 4, the present embodiment provides a casting runner filter, which includes a filter body 1, the filter body 1 is provided with a first runner 2 and a second runner 3 which are communicated with each other and have the same size, a first filter mechanism 4 is provided at a connection between the first runner 2 and the second runner 3, the first filter mechanism 4 includes a first filter screen 401 of 100ppi and a second filter screen 402 of 60ppi, which are vertically placed, and the first filter screen 401 is located above the second filter screen 402; a second filtering mechanism 5 is arranged in the second flow groove 3, the second filtering mechanism 5 comprises a third filtering net 501 of 60ppi and a fourth filtering net 502 of 100ppi which are vertically arranged, the third filtering net 501 is positioned above the fourth filtering net 502, and the aperture of the third filtering net 501 is larger than that of the fourth filtering net 502; the outlet of the filter body 1 is located in the second trough 3, and the second filter means 5 is located between the first filter means 4 and the outlet 6 in the molten steel flow direction. The first filter screen 401, the second filter screen 402, the third filter screen 501 and the fourth filter screen 502 all adopt zirconia filter screens. The molten steel poured into the runner type filter of the present embodiment may be a high temperature alloy of a brand such as K4648, K4202, K4002, K446, and K4222, and the present embodiment is described by taking a K4648 high temperature alloy as an example.

The working principle is as follows:

when the electric heating furnace is used, the first filter screen 401, the second filter screen 402, the third filter screen 501 and the fourth filter screen 502 are sequentially installed in the runner type filter, assembled with the current divider and the steel pipe and placed in the electric heating furnace for baking, wherein the baking process is 860 ℃ multiplied by 2h, and the electric heating furnace is placed in the vacuum melting furnace. After the high-temperature alloy in the vacuum smelting furnace is smelted, molten steel in the crucible is poured into a first launder 2 of a launder type filter at a certain uniform speed, the molten steel flows to a second launder 3 through the first launder 2, is filtered by a first filtering mechanism 4, flows to an outlet in the second launder 3 after being filtered, is filtered by a second filtering mechanism 5, and is beneficial to improving the metallurgical quality of steel ingots through two-stage filtering. And the molten steel filtered twice flows into the lower trough-shaped shunt through the outlet, the molten steel flows into each steel pipe through the trough-shaped shunt, and after the molten steel is solidified, the steel pipes are removed to obtain steel ingots.

In the concrete operation, when the molten steel is poured into the first launder 2, the height of the molten steel exceeds that of the second filter screen 402 and is positioned at the first filter screen 401 by controlling the pouring speed of the molten steel, because most of impurities such as large-size inclusions, oxides and the like in the molten steel float above the molten steel, the first filter mechanism 4 with small upper aperture and large lower aperture is adopted, so that on one hand, the large-size impurities in the molten steel can be filtered off at one time; on the other hand, the lower molten steel containing small-sized impurities can rapidly pass through the second filter screen 402 with a larger lower aperture, so that the molten steel pouring speed is increased, and the pouring efficiency can be improved. After being filtered by the first filtering mechanism 4, the molten steel entering the second runner 3 is filtered by the second filtering mechanism 5. In the embodiment, the second filtering mechanism 5 with large upper aperture and small lower aperture is adopted, so that small-size impurities in the molten steel at the lower part can be further filtered, impurities in the high-temperature molten steel can be further reduced, and the metallurgical quality of steel ingots is improved; on the other hand, if the amount of molten steel entering the second launder 3 is too large, the third strainer 501 having a large upper hole diameter allows molten steel to pass through quickly, thereby preventing the flow rate of molten steel from being too slow, and improving the molten steel pouring efficiency.

Comparative example 1

As shown in FIG. 1, comparative example 1 was prepared by casting a K4648 alloy material using a conventional flow channel type filter, and the remaining process conditions were the same as those of example 1.

Three dross tests were performed on the K4648 alloy ingots smelted in example 1 and comparative example 1, according to standard HB5406-2016 dross test method for cast superalloy ingots. The test results are shown in table 1:

TABLE 1

As can be seen from table 1, for current chute formula filter, adopt the utility model discloses an alloy ingot dross content that the pouring of chute formula filter obtained still less, has improved the metallurgical quality of alloy ingot.

Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made in the embodiments of the invention by those skilled in the art without departing from the spirit and substance of the invention, and these modifications or substitutions are intended to be within the scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The casting runner type filter comprises a filter body (1), and is characterized in that the filter body (1) is provided with a first runner (2) and a second runner (3) which are communicated with each other, a first filtering mechanism (4) is arranged at the joint of the first runner (2) and the second runner (3), the first filtering mechanism (4) comprises a first filtering net (401) and a second filtering net (402) which are vertically arranged, the first filtering net (401) is positioned above the second filtering net (402), and the aperture of the first filtering net (401) is smaller than that of the second filtering net (402); a second filtering mechanism (5) is arranged in the second flow groove (3), the second filtering mechanism (5) comprises a third filtering net (501) and a fourth filtering net (502) which are vertically arranged, the third filtering net (501) is positioned above the fourth filtering net (502), and the aperture of the third filtering net (501) is larger than that of the fourth filtering net (502); the outlet (6) of the filter body (1) is positioned in the second runner (3) and along the flowing direction of the molten steel, and the second filtering mechanism (5) is positioned between the first filtering mechanism (4) and the outlet (6).

2. The casting runner filter according to claim 1, wherein the first filter mesh (401), the second filter mesh (402), the third filter mesh (501) and the fourth filter mesh (502) are all made of zirconia filter mesh.

3. The casting runner filter of claim 1, wherein the first filter (401) and the fourth filter (502) have a pore size density of 80-120ppi, and the second filter (402) and the third filter (501) have a pore size density of 40-70ppi.

4. A casting runner filter according to claim 1 characterised in that the first (2) and second (3) runners are of the same size.