RU106157U1 - INTERMEDIATE BUCKET FOR CONTINUOUS METAL CASTING - Google Patents

Abstract

 An intermediate ladle for continuous casting of metal, including a lined body, receiving and casting chambers separated by partitions, exhaust glasses, a receiver-quencher of a jet of metal poured from a protective pipe mounted on the bottom of the bucket and made in the form of a glass with shoulders, characterized in that inside the receiver-absorber, an additional glass of height h1 is made with a convex base with an area of S1, and S1 = 6 ÷ 8S, S2 = 1.2 ÷ 1.4S1, ah = 0.18 ÷ 0.20H, h1 = 0.5 ÷ 0 , 6h, where S is the cross-sectional area of the protective pipe, h is the height of the receiver-extinguishes a, S2 - base area of the receiver-damper, H - height of the intermediate bucket, in addition, overflow channels in the form of a truncated pyramid or cone are made in the walls of the receiver-damper, the base of which is directed towards the partitions, and the axis of the overflow channels are made at an angle α to the base of the receiver-damper.

Description

The utility model relates to metallurgy, and more particularly, to continuous casting of metal.

An intermediate ladle for continuous casting of metal is known, including: a lined body, receiving and pouring sections, exhaust glasses, gas supply devices, partitions, a receiver-damper of a jet of metal poured from a protective pipe mounted on the bottom of the bucket and made in the form of a glass with shoulders (see U.S. Patent No. 5,169,591, B22D 41/02).

The closest analogue to the claimed device is an intermediate ladle for continuous casting of metal including: receiving and casting chambers, partitions with overflow channels, devices for supplying gas, exhaust glasses, receiver-damper from the protective metal pipe mounted on the bottom of the bucket and made in the form cups with shoulders (see Russian patent No. 2185261, B22D 41/00).

The disadvantages of the known devices for continuous casting of steel are spraying the jet of supplied metal with the formation of oxide compounds, overflow of non-metallic inclusions through partitions and overflow channels in the partitions, non-metallic inclusions entering the outlet cup of the intermediate ladle, insufficient mixing of the metal in the receiving chamber of the intermediate ladle, and a decrease in the quality of the cast metal.

The technical problem solved by the utility model is that the spray of the feed metal stream with the formation of oxide compounds is prevented, overflow of non-metallic inclusions through partitions and overflow channels in partitions is excluded, non-metallic inclusions get into the outlet bucket of the intermediate ladle, and mixing of metal in the receiving chamber is ensured tundish, improves the quality of the cast metal.

The problem is solved in that in an intermediate ladle for continuous casting of metal, including a lined body, receiving and casting chambers, separated by partitions, exhaust glasses, a receiver-damper of the jet of metal poured from the protective pipe, mounted on the bottom of the bucket and made in the form of a glass with shoulders, in contrast to the closest analogue, an additional glass of height h ₁ with a convex shape base of area S _{1 is} made inside the receiver-damper, with S ₁ = 6 ÷ 8S, S ₂ = 1,2 ÷ 1,4S ₁ , ah = 0, 18 ÷ 0.20H, h ₁ = 0.5 ÷ 0.6h, where S - p cross-sectional area of the protective pipe, h - height of the receiver-damper, S ₂ - base area of the receiver-damper, H - height of the intermediate bucket, in addition, overflow channels in the shape of a truncated pyramid or cone are made in the walls of the receiver-damper, the base of which is directed to the side partitions, and the axis of the overflow channels made at an angle α to the base of the receiver-damper.

All mathematical dependencies are obtained empirically and are empirical.

The essence of the utility model is that in the receiving chamber of the intermediate bucket there is a receiver-absorber made in the form of a cup with shoulders, inside the receiver-absorber an additional cup is made of height h ₁ with a base of a convex shape with area S ₁ , and S ₁ = 6 ÷ 8S , S ₂ = 1.2 ÷ 1.4S ₁ , ah = 0.18 ÷ 0.20H, h ₁ = 0.5 ÷ 0.6h, where S is the cross-sectional area of the protective pipe, h is the height of the receiver-damper, S ₂ - the base area of the receiver-damper, H - the height of the intermediate bucket. Overflow channels are made in the walls of the receiver-damper with an axis at an angle α to the base of the damper receiver in the form of a truncated pyramid or cone, the base of which is directed towards the partitions.

When the base area of the additional cup with an area S ₁ equal to 6-8 cross-sectional areas of the protective tube S and a height h ₁ equal to 0.5-0.6 height h of the receiver-quencher, the metal is poured into the receiver-quencher, quenching the metal stream and receiving the first portion cold ”and contaminated metal, the level of non-metallic inclusions is reduced, mixing of the metal in the receiving chamber is ensured.

When the base cup’s base area is less than 6 cross-sectional areas of the protective tube S and height h _{1 is} less than 0.5 h height of the receiver-quencher, it is difficult to extinguish the metal stream and receive the first portion of “cold” and contaminated metal, metal splashes are formed with the formation of oxide compounds affecting the quality of the metal, it is difficult to transfer the metal into the receiver-absorber due to the oncoming metal flow and the level of non-metallic inclusions increases.

If the base area of the additional cup exceeds 8 times the cross-sectional area of the protective pipe S and the height h _{1 is} more than 0.6 of the height h of the receiver-damper, the metal is difficult to overflow into the receiver-damper and the level of non-metallic inclusions increases, and the metal is not mixed in the receiver chamber.

When the base area of the receiver-damper S ₂ equal to 1.2-1.4, the base area S _{1 of the} additional cup with a height h of 0.18-0.20 height H of the bath of the intermediate bucket, the metal is transferred from the additional cup to the receiver-damper, mixing metal in the receiving chamber due to the presence of overflow channels, the removal of non-metallic inclusions.

When the base area of the receiver-damper S _{2 is} less than 1.2 times the base area S _{1 of the} internal tank and the height h is less than 0.18 of the height H of the intermediate bucket bath, the metal is not overfilled from the internal to the external tank, the metal is mixed in the receiving chamber, removal of non-metallic inclusions.

When the base area of the receiver-quencher S ₂ exceeds 1.4 times the area of the base S _{1 of} an additional cup and a height h of more than 0.20 height H of the bathtub of the intermediate bucket, the consumption of refractory materials for the manufacture of the receiver-quencher is significantly increased.

The angle α is selected depending on the distance of the partitions to the axis of the cast metal.

The essence of the utility model is illustrated in the drawing, where Fig. 1 shows an intermediate bucket, Fig. 2 is a section AA in Fig. 1, Fig. 3 is a unit 1.

The intermediate bucket consists of a lined body 1, a receiving 2 and a casting 3 chambers, separated by partitions 4, exhaust glasses 5, a receiver-damper 6, a protective pipe 7. The base area of the receiver-damper 6 - S ₂ , the height of the receiver-damper 6 - h, bucket height - N.

Inside the receiver-damper 6, an additional glass 8 is made with a height of h ₁ with a base of a convex shape 9 with an area of S ₁ . In the walls of the receiver-damper 6, overflow channels 10 are made in the form of a truncated pyramid or cone, the base of which is directed towards the partitions 4, and the axis of the overflow channels 10 are made at an angle α to the base of the receiver-damper 6.

The intermediate bucket works as follows.

The metal falls from the protective tube 7 to the base 9 of the additional glass 8, made inside the receiver-damper 6, where the first portions of the "cold" and contaminated metal remain.

The following portions of metal enter the absorber-receiver 6 and through the overflow openings 10 fall on the partitions 4, where they are reflected in the upper zone of the receiving chamber 3, mixed with the newly incoming metal. Due to this, metal spraying does not occur and oxide compounds are not formed.

In the upper zone of the receiving chamber 3, most of the non-metallic inclusions are removed.

Then the metal enters the casting chamber 3 and the exhaust glasses 5.

As a result of casting steel through the proposed intermediate ladle, the spray of the feed metal stream with the formation of oxide compounds is prevented, overflow of non-metallic inclusions through partitions and overflow channels in the partitions is excluded, non-metallic inclusions enter the outlet cup of the intermediate ladle, mixing of the metal in the receiving chamber of the intermediate ladle is ensured, and quality of cast metal.

Claims (1)

An intermediate ladle for continuous casting of metal, including a lined body, receiving and casting chambers separated by partitions, exhaust glasses, a receiver-damper of a jet of metal poured from a protective pipe mounted on the bottom of the ladle and made in the form of a glass with shoulders, characterized in that inside the receiver-damper there is an additional cup with a height of h ₁ with a convex base with an area of S ₁ , with S ₁ = 6 ÷ 8S, S ₂ = 1.2 ÷ 1.4S ₁ , ah = 0.18 ÷ 0.20H, h ₁ = 0.5 ÷ 0.6h, where S is the cross-sectional area of the protective pipe, h is the height of the receiver asitelya, S ₂ - footprint receiver-absorber, H - the height of the tundish, in addition, the walls-absorber receiver formed overflow channels in the form of a truncated pyramid or cone, the base of which is directed towards the partitions and overflow channel axis formed an angle α to the base of the receiver-damper.