CN211451895U - Chimney with buffer joint for submerged arc furnace - Google Patents

Chimney with buffer joint for submerged arc furnace Download PDF

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Publication number
CN211451895U
CN211451895U CN201921804903.XU CN201921804903U CN211451895U CN 211451895 U CN211451895 U CN 211451895U CN 201921804903 U CN201921804903 U CN 201921804903U CN 211451895 U CN211451895 U CN 211451895U
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China
Prior art keywords
chimney
wall
buffer
flange
arc furnace
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Active
Application number
CN201921804903.XU
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Chinese (zh)
Inventor
吴鑫月
金俊
曹杰
薛聪
张晓海
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Jiangsu Decheng Metallurgy Electric Furnace Equipment Co ltd
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Jiangsu Decheng Metallurgy Electric Furnace Equipment Co ltd
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Priority to CN201921804903.XU priority Critical patent/CN211451895U/en
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Abstract

The utility model discloses a chimney with a buffer joint for a submerged arc furnace, which mainly comprises a cylindrical upper chimney and a cylindrical lower chimney; the upper chimney is connected with the flue gas recovery pipeline, and the lower chimney is connected with the top of the hearth; the lower chimney comprises a first chimney wall and a first fireproof layer arranged on the inner side of the first chimney wall; the upper chimney comprises a second chimney wall and a second fireproof layer arranged on the inner side of the second chimney wall; the outer wall of the first chimney wall is provided with a plurality of rings of buffer sections, each buffer section comprises an annular box body, refractory bricks are arranged in the box bodies, and a sawtooth-shaped reinforcing plate is arranged between the buffer sections; the top of the uppermost layer buffer joint is provided with a first flange, the bottom of the upper chimney is provided with a second flange, and the first flange is connected with the second flange through a bolt.

Description

Chimney with buffer joint for submerged arc furnace
Technical Field
The utility model relates to a hot stove annex equipment field in ore deposit especially relates to a hot stove in ore deposit is with chimney of taking buffering festival.
Background
At present, the chimney for the traditional submerged arc furnace in China uses a steel plate additional fire-resistant layer structure (refer to the attached figure 1), and the structure is characterized in that:
firstly, the method comprises the following steps: the lower end of the chimney 9 is connected with the hearth 4, and the upper end is connected with the flue gas recovery pipeline 3; the chimney 9 is integrated;
secondly, the method comprises the following steps: the thickness of the refractory layer 11 in the chimney 9 is consistent;
but the inside temperature of furnace of hot stove in-process ore deposit of in-service use is higher, and one section chimney of being connected with furnace receives high temperature erosion for a long time, and the temperature of whole chimney surrounding environment is very much than the inside temperature difference of chimney, consequently produces expend with heat and contract with cold easily, damages inside flame retardant coating structure, reduces chimney life, and during the change, need all change whole chimney, has more later maintenance cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming of prior art, provide a chimney that mine heat stove was used and is taken buffering festival that maintenance cost is low, can overcome expend with heat and contract with cold, avoid the damage of flame retardant coating structure.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
a chimney with a buffer joint for a submerged arc furnace mainly comprises a cylindrical upper chimney and a cylindrical lower chimney; the upper chimney is connected with the flue gas recovery pipeline, and the lower chimney is connected with the top of the hearth; the lower chimney comprises a first chimney wall and a first fireproof layer arranged on the inner side of the first chimney wall; the upper chimney comprises a second chimney wall and a second fireproof layer arranged on the inner side of the second chimney wall; the outer wall of the first chimney wall is provided with a plurality of rings of buffer sections, each buffer section comprises an annular box body, refractory bricks are arranged in the box bodies, and a sawtooth-shaped reinforcing plate is arranged between the buffer sections; the top of the uppermost layer buffer joint is provided with a first flange, the bottom of the upper chimney is provided with a second flange, and the first flange is connected with the second flange through bolts.
Preferably, the outer wall of the second chimney wall is uniformly provided with a plurality of circles of reinforcing ribs.
Preferably, at least 2 buffer nodes are arranged.
Preferably, the thickness of the second refractory layer is 1/2-2/3 of the thickness of the first refractory layer.
Preferably, a plurality of first anchoring nails are further arranged on the inner wall of the first chimney wall, and the first anchoring nails extend to 1/2-2/3 of the thickness of the first refractory layer.
Preferably, a plurality of second anchoring nails are further arranged on the inner wall of the second chimney wall, and the second anchoring nails extend to 1/2-2/3 of the thickness of the second refractory layer.
The utility model has the advantages that:
firstly, the method comprises the following steps: the integrated chimney is designed into an upper chimney and a lower chimney, so that the later maintenance and replacement cost is low;
secondly, the method comprises the following steps: the outer wall (first chimney wall) of the lower chimney connected with the hearth is provided with a buffer joint, refractory bricks are arranged in the buffer joint, and meanwhile, the thickness of a first refractory layer in the lower chimney is thicker than that of a second refractory layer in the upper chimney, so that the heat resistance of the lower chimney is improved, the problems of expansion with heat and contraction with cold and damage to the structure of the inner refractory layer are solved, and the service life of the lower chimney is prolonged;
thirdly, the method comprises the following steps: a serrated reinforcing plate is arranged between the buffer joints to reinforce the firmness between the buffer joints;
fourthly: and the outer wall of the upper chimney (the second chimney wall) is provided with a reinforcing rib, so that the integral strength of the second chimney wall is improved.
Drawings
Fig. 1 is a schematic diagram of a chimney structure for a conventional submerged arc furnace.
Fig. 2 is a schematic structural diagram of the present invention.
In the figure: 1 is an upper chimney, 1.1 is a second chimney wall, 1.2 is a second fire-resistant layer, 1.3 is a second anchoring nail, 1.4 is a reinforcing rib, 2 is a lower chimney, 2.1 is a first chimney wall, 2.2 is a first fire-resistant layer, 2.3 is a first anchoring nail, 3 is a flue gas recovery pipeline, 4 is a hearth, 5 is a buffer joint, 5.1 is a box body, 5.2 is a refractory brick, 6 is a reinforcing plate, 7 is a first flange, 8 is a second flange, 9 is a chimney, 10 is a steel plate, 11 is a fire-resistant layer, and 12 is an anchoring nail.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
A chimney with a buffer joint for a submerged arc furnace mainly comprises a cylindrical upper chimney 1 and a cylindrical lower chimney 2; the upper chimney is connected with the flue gas recovery pipeline 3, and the lower chimney 2 is connected with the top of the hearth 4; the lower chimney 2 comprises a first chimney wall 2.1 and a first flame retardant coating 2.2 arranged on the inner side of the first chimney wall 2.1; the upper chimney 1 comprises a second chimney wall 1.1 and a second refractory layer 1.2 arranged on the inner side of the second chimney wall 1.1; a plurality of rings of buffer joints 5 are arranged on the outer wall of the first chimney wall 2.1, each buffer joint 5 comprises an annular box body 5.1, refractory bricks 5.2 are arranged in the box bodies 5.1, and a sawtooth-shaped reinforcing plate 6 is arranged between each buffer joint 5 and each buffer joint 5; the top of the uppermost layer buffer joint 5 is provided with a first flange 7, the bottom of the upper chimney 1 is provided with a second flange 8, and the first flange 7 is connected with the second flange 8 through bolts.
Preferably, the outer wall of the second chimney wall 1.1 is uniformly provided with a plurality of circles of reinforcing ribs 1.4.
Preferably, at least 2 buffer joints 5 are provided.
Preferably, the thickness of the second refractory layer 1.2 is 1/2-2/3 of the thickness of the first refractory layer 2.2.
Preferably, a plurality of first anchoring nails 2.3 are further arranged on the inner wall of the first chimney wall 2.1, and the first anchoring nails 2.3 extend to 1/2-2/3 of the thickness of the first fire-resistant layer 2.2.
Preferably, a plurality of second anchoring nails 1.3 are further arranged on the inner wall of the second chimney wall 1.1, and the second anchoring nails 1.3 extend to 1/2-2/3 of the thickness of the second fire-resistant layer 1.2.
According to the chimney with the buffer joint for the submerged arc furnace, the traditional integrated chimney (referring to the attached figure 1) is improved into the upper chimney 1 and the lower chimney 2, and the chimney is connected through the flange and the bolt, so that the later maintenance cost is reduced; meanwhile, the buffer section 5 is arranged on the outer wall of the first chimney wall 2.1, the refractory bricks 5.2 are arranged in the buffer section 5, and meanwhile, the thickness of the first refractory layer 2.2 is thicker than that of the second refractory layer 1.2, so that the heat resistance of the lower chimney 2 is improved, the problems of expansion with heat and contraction with cold and damage to the structure of the inner refractory layer are solved, and the service life of the lower chimney 2 is prolonged; a serrated reinforcing plate 6 is arranged between the buffer joints 5 and the buffer joints 5, so that the firmness between the buffer joints 5 is enhanced; the outer wall of the second chimney wall 1.1 is provided with a reinforcing rib 1.4, so that the overall strength of the second chimney wall 1.1 is improved.
The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims (6)

1. A chimney with a buffer joint for a submerged arc furnace mainly comprises a cylindrical upper chimney and a cylindrical lower chimney; the upper chimney is connected with the flue gas recovery pipeline, and the lower chimney is connected with the top of the hearth; the method is characterized in that: the lower chimney comprises a first chimney wall and a first fireproof layer arranged on the inner side of the first chimney wall; the upper chimney comprises a second chimney wall and a second fireproof layer arranged on the inner side of the second chimney wall; the outer wall of the first chimney wall is provided with a plurality of rings of buffer sections, each buffer section comprises an annular box body, refractory bricks are arranged in the box bodies, and a sawtooth-shaped reinforcing plate is arranged between the buffer sections; the top of the buffer joint on the uppermost layer is provided with a first flange, the bottom of the upper chimney is provided with a second flange, and the first flange is connected with the second flange through a bolt.
2. The chimney with the buffer joint for the submerged arc furnace according to claim 1, characterized in that: and a plurality of circles of reinforcing ribs are uniformly arranged on the outer wall of the second chimney wall.
3. The chimney with the buffer joint for the submerged arc furnace according to claim 1, characterized in that: the number of the buffer sections is at least 2.
4. The chimney with the buffer joint for the submerged arc furnace according to claim 1, characterized in that: the thickness of the second refractory layer is 1/2-2/3 of the thickness of the first refractory layer.
5. The chimney with the buffer joint for the submerged arc furnace according to claim 1, characterized in that: a plurality of first anchor nails are further arranged on the inner wall of the first chimney wall, and the first anchor nails extend to 1/2-2/3 of the thickness of the first fire-resistant layer.
6. The chimney with the buffer joint for the submerged arc furnace according to claim 1, characterized in that: a plurality of second anchoring nails are further arranged on the inner wall of the second chimney wall, and the second anchoring nails extend to 1/2-2/3 of the thickness of the second refractory layer.
CN201921804903.XU 2019-10-25 2019-10-25 Chimney with buffer joint for submerged arc furnace Active CN211451895U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921804903.XU CN211451895U (en) 2019-10-25 2019-10-25 Chimney with buffer joint for submerged arc furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921804903.XU CN211451895U (en) 2019-10-25 2019-10-25 Chimney with buffer joint for submerged arc furnace

Publications (1)

Publication Number Publication Date
CN211451895U true CN211451895U (en) 2020-09-08

Family

ID=72304187

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921804903.XU Active CN211451895U (en) 2019-10-25 2019-10-25 Chimney with buffer joint for submerged arc furnace

Country Status (1)

Country Link
CN (1) CN211451895U (en)

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