CN214263877U

CN214263877U - Slag-absorbing, filtering and separating slag-stopping wall for tundish

Info

Publication number: CN214263877U
Application number: CN202120227467.5U
Authority: CN
Inventors: 邓天鹏; 刘德全
Original assignee: Anshan Huaxing Metallurgy Furnace Charge Co ltd
Current assignee: Anshan Huaxing Metallurgy Furnace Charge Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-09-24
Anticipated expiration: 2031-01-27

Abstract

The utility model relates to the technical field of novel inorganic non-metallic materials, in particular to a tundish slag-absorbing filtering separation slag-stopping wall, wherein each group of separation slag-stopping walls comprises a first split body and a second split body; the first split body is arranged on two sides of the long nozzle, a plurality of groups of side surface flow guide holes are uniformly formed in the first split body close to the bottom in the thickness direction, a plurality of groups of top surface flow guide holes are uniformly formed in the height direction, the top surface flow guide holes are far away from one side of the side surface flow guide holes, and the top surface flow guide holes are communicated with the side surface flow guide holes in a one-to-one correspondence manner; the two split bodies and the long water gap are arranged on two different sides of the first split body, and two sides of one cross section end face of each split body are inclined towards the middle to form a vertical diversion convex ridge; the upper surface of the first split body is higher than the bottom surface of the second split body after installation, and the upper surface of the first split body is lower than the liquid level of the molten steel in the tundish. The utility model discloses replace the slit of traditional slag wall with the pore, adsorption area promotes by a wide margin, and the effect of adsorption polymerization inclusion is better, and the formation of vortex is showing and is reducing in the molten steel.

Description

Slag-absorbing, filtering and separating slag-stopping wall for tundish

Technical Field

The utility model relates to a novel inorganic non-metallic material technical field, in particular to slag-absorbing, filtering and separating slag-stopping wall for a tundish.

Background

Fig. 1 shows the internal structure of a conventional tundish, and in short-run steelmaking, a tundish 3 is an important refractory vessel, and receives molten steel poured from a ladle 1 through a long nozzle 2, and then the molten steel is stabilized by the tundish 3 and is adjusted and distributed to each mold through a plurality of nozzles 5 and stopper rods 6. The slag blocking walls 4 in various forms are arranged in the tundish, so that the volume of the tundish can be fully and effectively utilized, impurities in molten steel can float upwards and be separated effectively, and the height, the arrangement position and the number of the slag blocking walls have great influence on the removal of the impurities. The slag-stopping wall can be a single wall, a double wall or a multi-wall, and aims to stop slag and improve the cleanliness of molten steel. The material is generally high-alumina, and the bricks can be built in the tundish, and can also be made into precast blocks to be placed in the tundish.

In actual production, molten steel in the tundish flows locally and unevenly, and particularly, a stagnation area where the molten steel is inactive exists at the bottom of the tundish, so that inclusions are difficult to float upwards. The slag wall (weir) is added on the tundish, so that the flowing track of the molten steel can be improved, the molten steel flows along the interface of the inclusion, the floating distance of the inclusion is shortened, and the absorption of slag is facilitated. And strong eddy current caused by ladle pouring flow impact can be limited in a local area, so that turbulent flow diffusion is prevented, and surface waves are caused to coil slag into molten steel. Therefore, after the slag wall (weir and plate) is arranged on the filter belt between the turbulent flow and the laminar flow of the molten steel, the molten steel can directionally and directly flow to the surface of a molten pool, so that the residence time of the molten steel in a tundish is increased, and the separation rate of inclusions is improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a slag-absorbing filtering separation slag-stopping wall for a tundish.

The specific technical scheme is as follows:

a tundish slag-absorbing filtering separation slag-stopping wall comprises two groups, wherein the two groups are arranged at two sides of an outlet of a long nozzle in a tundish, and each group of separation slag-stopping walls comprises a first split body and a second split body; the split body I is arranged on two sides of the long nozzle, the cross section of the split body I is trapezoidal and is matched with the cross section of the bottom of the tundish, a plurality of groups of side surface diversion holes are uniformly formed near the bottom in the thickness direction, a plurality of groups of top surface diversion holes are uniformly formed in the height direction, the top surface diversion holes are far away from one side of the side surface diversion holes, and the top surface diversion holes are communicated with the side surface diversion holes in a one-to-one correspondence manner; the split body II and the long nozzle are arranged on two different sides of the split body I, the cross section of the split body II is trapezoidal and is matched with the cross section of the upper part of the tundish, a pair of lifting rings are arranged at the top of the split body II, and two sides of one cross section end face are inclined towards the middle to form a vertical diversion convex ridge; the upper surface of the first split body is higher than the bottom surface of the second split body after installation, and the upper surface of the first split body is lower than the liquid level of the molten steel in the tundish.

The top surface diversion holes are communicated with the side surface diversion holes, and the side surface diversion holes form a certain upper elevation angle.

A section of buffer opening is arranged in the middle of the bottom surface of the split body along the thickness direction.

One surface of the split body II with the flow guide convex ridge is uniformly provided with spoon-shaped inwards-concave slag blocking auxiliary grooves in the vertical direction, and the spoon head of the spoon is upward.

The upper elevation angle is 30-60 degrees.

The cross section of the buffer opening is square.

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

the utility model discloses the molten steel flows in through the side water conservancy diversion hole that has 30-60 angle of elevation of going up, enable the molten steel flow more to be favorable to the come-up of inclusion, then and flow out through top surface water conservancy diversion hole, in this process, the inclusion in the molten steel adsorbs each other and grows up, the molten steel normally flows when flowing from top surface water conservancy diversion hole, this separation and the gathering of inclusion from the molten steel, the blockage by components of a whole that can function independently two and pushing off the slag auxiliary tank in the horizontal direction, the inclusion is hung by the spoon head of pushing off the slag auxiliary tank and is got back to on the molten steel liquid level again, receive buoyancy effect stop in vertical direction at the molten steel liquid level and above, thereby with pure molten steel separation. The pure molten steel continuously flows through the gaps between the bottoms of the two split bodies and the tundish and is distributed into the flow crystallizers through the submerged nozzles. In the process, the arrangement of the separation slag wall can reduce the dead zone in the molten steel, the pore passage replaces the slit of the traditional slag wall, the adsorption area is greatly increased, the effect of adsorbing the polymeric inclusion is better, and the formation of the vortex in the molten steel is obviously reduced.

The guide convex ridge can guide the flow of the molten steel from the center shaft of the tundish to the two sides of the center shaft rapidly, so that the flow in the molten steel is increased, and dead angles are avoided. A section of buffer opening is formed in the middle of the bottom surface of the first split body along the thickness direction, so that the impact of molten steel flow at the outlet of the long nozzle can be effectively relieved. One surface of the split body II with the flow guide convex ridge is uniformly provided with spoon-shaped inwards-concave slag blocking auxiliary grooves in the vertical direction, the spoon head of the spoon is upward, more groove grooves capable of hanging impurities can be formed on the surface of the split body II, the impurities are prevented from flowing through the crystallizer through a gap at the bottom of the split body II under the clamping of molten steel liquid flow, and the quality of a casting blank is guaranteed.

Drawings

FIG. 1 is a conventional tundish internal construction;

FIG. 2 is a front view of a split body of the separating slag trap wall of the present invention;

FIG. 3 is a rear view of the separating slag trap of the present invention;

FIG. 4 is a front view of the separating slag trap of the present invention;

FIG. 5 is a plan view of the separated slag retaining wall of the present invention;

FIG. 6 is an installation diagram of the separation slag trap of the present invention;

FIG. 7 is a schematic structural view of the split secondary slag chute of the separating slag-stopping wall of the utility model;

fig. 8 is a working schematic diagram of the separation slag-stopping wall of the utility model.

In the figure, 1 — ladle; 2-long water gap; 3, pouring a tundish; 4-slag wall; 5, an immersion type water gap; 6, plugging the rod; 7, splitting; 8-a second split; 9-a hoisting ring; 10-flow guiding convex ridge; 11-side flow guide holes; 12-top surface flow guide holes; 13-buffer port; 14-molten steel; 15-auxiliary slag-stopping groove.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings, but the scope of the present invention is not limited to the accompanying drawings.

Fig. 2 is the utility model discloses separation slag wall components of a whole that can function independently first main view, fig. 3 is the utility model discloses separation slag wall components of a whole that can function independently first rear view, fig. 4 is the utility model discloses separation slag wall components of a whole that can function independently two main views, fig. 5 is the utility model discloses separation slag wall components of a whole that can function independently two top views, fig. 6 is the utility model discloses separation slag wall installation schematic diagram, fig. 7 is the utility model discloses separation slag wall components of a whole that can function independently two auxiliary grooves structure schematic diagrams, as shown in the figure:

the utility model discloses a tundish slag-absorbing filtering separation slag-stopping wall, which comprises two groups and is arranged at the two sides of the outlet of a long nozzle 2 in the tundish, and each group of separation slag-stopping walls comprises a first split body 7 and a second split body 8; the first split bodies 7 are arranged on two sides of the long nozzle 2, the cross sections of the first split bodies 7 are trapezoidal and are matched with the cross section of the bottom of the tundish 3, a plurality of groups of side surface diversion holes 11 are uniformly formed near the bottom in the thickness direction, a plurality of groups of top surface diversion holes 12 are uniformly formed in the height direction, the top surface diversion holes 12 are far away from one side of the side surface diversion holes 11, and the top surface diversion holes 12 are communicated with the side surface diversion holes 11 in a one-to-one correspondence manner; the split body II 8 and the long nozzle 2 are arranged on two different sides of the split body I7, the cross section of the split body II 8 is trapezoidal and is matched with the cross section of the upper part of the tundish 3, the top of the split body II 8 is provided with a pair of lifting rings 9, and the end surface of one cross section is provided with a vertical diversion convex ridge 10 formed by inclining two sides to the middle; the upper surface of the first split body 7 is higher than the bottom surface of the second split body 8 after installation, and the upper surface of the first split body 7 is lower than the liquid level of the molten steel 14 in the tundish.

The top surface diversion holes 12 are communicated with the side surface diversion holes 11, and the side surface diversion holes 11 form an upper elevation angle of 30-60 degrees. A section of buffer opening 13 is formed in the middle of the bottom surface of the first split body 7 along the thickness direction. One surface of the split body 8 with the flow guiding convex ridge 10 is uniformly provided with spoon-shaped concave slag blocking auxiliary grooves 15 in the vertical direction, and the spoon head of the spoon is upward. The cross section of the buffer opening 13 is square.

Fig. 8 is the utility model discloses separation slag wall working schematic diagram, as shown in the figure, during operation, in the tundish, by long mouth of a river 2 respectively to both sides installation components of a whole that can function independently one 7 and components of a whole that can function independently two 8, components of a whole that can function independently one 7 is installed in long mouth of a river 2 both sides, and components of a whole that can function independently two 8 are installed in the different both sides of components of a whole that can function independently one 7 through rings 9 and long. Molten steel in a steel ladle 1 flows into a tundish through a long nozzle 2, the molten steel flows from an outlet of the long nozzle to the periphery, the molten steel is blocked by a first split body 7, the molten steel flows in through a side guide hole 11 and flows out through a top guide hole 12, in the process, inclusions in the molten steel are adsorbed and grow, the molten steel normally flows when flowing out from the top guide hole 12, the inclusions are separated from the molten steel and are gathered, the inclusions are blocked by a second split body 8 and a slag blocking auxiliary groove 15 in the horizontal direction, the inclusions are hung by a spoon head of the slag blocking auxiliary groove 15 and return to the liquid level of the molten steel again, and the inclusions stay at and above the liquid level of the molten steel under the action of buoyancy in the vertical direction, so that the inclusions are separated from the molten steel in a pure mode. The pure molten steel continuously flows through the gap between the bottom of the split body II 8 and the tundish and is distributed into the flow crystallizers through the submerged nozzles.

Claims

1. The utility model provides a sediment filtering separation pushing off slag wall is inhaled to middle package, includes two sets ofly, installs in the inside export both sides at the long mouth of a river of middle package, its characterized in that: each group of separated slag blocking walls comprises a first split body and a second split body; the split body I is arranged on two sides of the long nozzle, the cross section of the split body I is trapezoidal and is matched with the cross section of the bottom of the tundish, a plurality of groups of side surface diversion holes are uniformly formed near the bottom in the thickness direction, a plurality of groups of top surface diversion holes are uniformly formed in the height direction, the top surface diversion holes are far away from one side of the side surface diversion holes, and the top surface diversion holes are communicated with the side surface diversion holes in a one-to-one correspondence manner; the split body II and the long nozzle are arranged on two different sides of the split body I, the cross section of the split body II is trapezoidal and is matched with the cross section of the upper part of the tundish, a pair of lifting rings are arranged at the top of the split body II, and two sides of one cross section end face are inclined towards the middle to form a vertical diversion convex ridge; the upper surface of the first split body is higher than the bottom surface of the second split body after installation, and the upper surface of the first split body is lower than the liquid level of the molten steel in the tundish.

2. The tundish slag-absorbing filtering-separating slag-stopping wall according to claim 1, characterized in that: the top surface diversion holes are communicated with the side surface diversion holes, and the side surface diversion holes form a certain upper elevation angle.

3. The tundish slag-absorbing filtering-separating slag-stopping wall according to claim 1, characterized in that: a section of buffer opening is arranged in the middle of the bottom surface of the split body along the thickness direction.

4. The tundish slag-absorbing filtering-separating slag-stopping wall according to claim 1, characterized in that: one surface of the split body II with the flow guide convex ridge is uniformly provided with spoon-shaped inwards-concave slag blocking auxiliary grooves in the vertical direction, and the spoon head of the spoon is upward.

5. The tundish slag-absorbing filtering-separating slag-stopping wall according to claim 2, characterized in that: the upper elevation angle is 30-60 degrees.

6. The tundish slag-absorbing filtering-separating slag-stopping wall according to claim 3, characterized in that: the cross section of the buffer opening is square.