A carbon roasting furnace roof insulation structure

Abstract

The present invention discloses a carbon roasting furnace roof insulation structure. A carbon roasting furnace roof insulation structure comprises a cotton felt insulation layer and a heavy castable prefabricated block insulation layer, wherein the heavy castable prefabricated block insulation layer comprises at least 1800 strip carbon roasting furnace roof insulation blocks sequentially installed on the cotton felt insulation layer; four high-aluminum polyhydrogen insulation bricks are respectively cast and inlaid with heavy castable materials in the left inner concave groove and the right inner concave groove of the lower bottom surface of the strip carbon roasting furnace roof insulation block. The present invention reduces the heat loss of the carbon roasting furnace top, realizes energy saving and consumption reduction, and reduces the production cost of anode carbon blocks; it also solves the problem of the existing carbon roasting furnace top insulation structure causing materials to fall into the fire channel and the expansion joint cotton felt to deviate and deform due to the on-site casting of the carbon roasting furnace roof; and improves the service life of the strip carbon roasting furnace top insulation block parts.

Description

Technical Field

[0001] The invention belongs to a carbon roasting furnace, in particular to a carbon roasting furnace top thermal insulation structure. Background Art

[0002] There are two common methods for the thermal insulation structure of the top of the existing carbon roasting furnace: the first method is to lay the corresponding thermal insulation felt after the fire channel bricks are capped, and then complete the formwork support according to the length and width of the fire channel, and then place and fix the frame of the component at the specified position and then cast the heavy castable; the second method is to design the drawings according to the length and width of the fire channel and the position of the holes in the fire channel, and make the thermal insulation blocks of the top of the carbon roasting furnace at a location other than the construction site according to the drawing size requirements, the casting location is moved out of the construction site, and the casting method is changed from on-site casting to off-site prefabrication, and the holes of the thermal insulation blocks on the top of the carbon roasting furnace are left with round holes at the joints of refractory clay bricks. The above two carbon roasting furnace roof insulation structures have certain defects: the first type of on-site cast carbon roasting furnace roof insulation structure cannot completely guarantee that the center distance of each carbon roasting furnace top insulation block after casting is within the error range, and it is found in the annual furnace construction projects that the expansion joint cotton felt between the carbon roasting furnace top insulation block and the carbon roasting furnace top insulation block is deformed and deviated when the castable is vibrated by construction tools, and the material falls into the fire channel and cannot be cleaned due to on-site casting (and the castable contains water). During the production operation, the service life of the on-site cast carbon roasting furnace top insulation block is short and the burn loss rate is too high. Because the production process requires that the heating method is that the flame enters the fire channel through the hole in the workpiece, the carbon roasting furnace top insulation block is limited in temperature and causes the castable to fall off. The second type of prefabricated parts outside the site solves the problem of materials falling into the fire channel due to on-site pouring and the problem of expansion joint felt deviation and deformation, and also prevents the castable inside the insulation block on the top of the carbon roasting furnace from falling off due to the high temperature radiation of the flame. However, the holes in the insulation block on the top of the carbon roasting furnace are left with refractory glue and earth bricks to splice the round holes, but it still cannot solve the problem of heat loss on the top of the carbon roasting furnace. The measured temperature on the top of the carbon roasting furnace during workshop operation is usually 100-120℃. How to solve the problem of materials falling into the fire channel and expansion joint felt deviation and deformation due to on-site pouring of the carbon roasting furnace top, how to reduce heat loss on the top of the carbon roasting furnace, achieve energy saving and consumption reduction, and reduce the production cost of anode carbon blocks are issues that need to be solved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a carbon roasting furnace roof insulation structure. The carbon roasting furnace roof insulation structure can solve the problem of materials falling into the fire channel and expansion joint cotton felt running off the track and deforming due to on-site pouring of the carbon roasting furnace roof; it can reduce the heat loss of the carbon roasting furnace roof, achieve energy saving and consumption reduction, and reduce the production cost of anode carbon blocks.

[0004] The technical solution of the present invention to solve the above technical problems is: a carbon roasting furnace roof insulation structure, characterized in that: it comprises a cotton felt insulation layer and a heavy castable prefabricated block insulation layer sequentially installed on the top of the carbon roasting furnace flue wall, the heavy castable prefabricated block insulation layer comprises at least 1800 strip carbon roasting furnace top insulation blocks sequentially installed on the cotton felt insulation layer; the cotton felt insulation layer has a thickness of 50-100 mm, and the heavy castable prefabricated block insulation layer has a thickness of 270-280 mm;

[0005] The center position of the top surface of the insulation block on the top of the strip carbon roasting furnace is provided with a vertical flame-spraying channel that passes through to the lower bottom surface. The left and right sides of the vertical flame-spraying channel on the lower bottom surface of the insulation block on the top of the strip carbon roasting furnace are respectively provided with a left concave groove and a right concave groove along the longitudinal center line. The insulation block on the top of the strip carbon roasting furnace has a length of 1290-1300 mm, a width of 570-580 mm, and a height of 270-275 mm. The left concave groove on the lower bottom surface of the insulation block on the top of the strip carbon roasting furnace has a length of 460-465 mm and a width of 230-235 mm. ㎜, height 65-70㎜, the right concave groove on the bottom surface of the insulation block on the top of the strip carbon roasting furnace is 440-445㎜ long, 230-235㎜ wide, and 65-70㎜ high; the middle part of the insulation block on the top of the strip carbon roasting furnace is cast with heavy casting material, and two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades are provided with heavy casting material. The left and right concave grooves on the bottom surface of the insulation block on the top of the strip carbon roasting furnace are respectively cast and inlaid with 4 high-alumina polyhydrogen insulation bricks using heavy casting material.

[0006] The preparation method of the strip-shaped carbon roasting furnace top insulation block is as follows: prepare a carbon roasting furnace top insulation block skeleton that is in the same shape as the strip-shaped carbon roasting furnace top insulation block, and the bottom surface of the carbon roasting furnace top insulation block skeleton is provided with an inner concave groove along the longitudinal center line; a carbon roasting furnace top insulation block mold is provided on a vibration table of a vibration molding machine, and two refractory bricks with semicircular inner grooves in cross section on the upper and lower sides of the corresponding side facades are placed close to each other on both sides of the transverse center line of the bottom of the carbon roasting furnace top insulation block mold box, and four high-aluminum polyhydrogen insulation bricks are placed in sequence along the carbon roasting furnace top insulation block. The longitudinal center line of the bottom of the mold box of the insulation block on the top of the furnace is placed on the left and right sides of the two refractory bricks with semicircular inner grooves in cross section on the corresponding side facades set on the bottom of the mold box of the insulation block on the top of the carbon roasting furnace. There is a gap for pouring heavy castables between the two refractory bricks with semicircular inner grooves in cross section on the corresponding side facades and placed on the transverse center line of the bottom of the mold box of the insulation block on the top of the carbon roasting furnace. There is a heavy castable gap between the two refractory bricks with semicircular inner grooves in cross section on the corresponding side facades and the high-alumina polyhydrogen insulation bricks on the adjacent left and right sides. There is a gap for pouring heavy castables, and there is a gap for pouring heavy castables between the adjacent high-aluminum polyhydrogen insulation bricks of the 4 high-aluminum polyhydrogen insulation bricks on the left and right sides of the bottom of the carbon roasting furnace top insulation block mold box. The carbon roasting furnace top insulation block skeleton is buckled into the carbon roasting furnace top insulation block mold box, and the concave groove set on the lower bottom surface of the carbon roasting furnace top insulation block skeleton buckled in the carbon roasting furnace top insulation block mold box is buckled on the two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades on both sides of the horizontal center line of the bottom of the carbon roasting furnace top insulation block mold box. , two refractory bricks with semicircular inner grooves in cross section on the upper and lower corresponding side facades, and four high-alumina polyhydrogen insulation bricks on the left and right sides, the two refractory bricks with semicircular inner grooves in cross section on the upper and lower corresponding side facades are cast with heavy castables to form a vertical flame-spraying channel that runs through the insulation block on the top of the strip carbon roasting furnace, and the heavy castables are used to cast and start the vibration molding machine to vibrate and shape the insulation block on the top of the strip carbon roasting furnace; using the vibration molding machine to prepare the insulation block on the top of the strip carbon roasting furnace can improve the volume density and compressive strength of the insulation block on the top of the strip carbon roasting furnace.

[0007] The beneficial effects of the present invention are as follows: since the present invention is provided with a cotton felt insulation layer and a heavy castable prefabricated block insulation layer which are sequentially installed on the top of the carbon roasting furnace fire channel wall, the heavy castable prefabricated block insulation layer includes at least 1800 strip-shaped carbon roasting furnace top insulation blocks which are sequentially installed on the cotton felt insulation layer, a vertical flame-spraying channel which penetrates to the lower bottom surface is provided at the center position of the top surface of the strip-shaped carbon roasting furnace top insulation block, concave grooves are respectively provided on the left and right sides of the vertical flame-spraying channel on the lower bottom surface of the strip-shaped carbon roasting furnace top insulation block along the longitudinal center line, and 4 high-alumina polyhydrogen insulation bricks are respectively cast and inlaid with heavy castables in the left and right concave grooves on the lower bottom surface of the strip-shaped carbon roasting furnace top insulation block. After testing, it is found that the use of high-aluminum polyhydrogen insulation bricks as the cast and inlaid lining insulation layer in the reserved left and right concave grooves of the top insulation block of the strip carbon roasting furnace has a good insulation effect. Compared with the existing carbon roasting furnace top insulation structure, when the fire channel temperature reaches 1250℃, the carbon roasting furnace top surface temperature is measured to be 100-120℃. When the fire channel temperature reaches 1250℃, the carbon roasting furnace top insulation structure of the present invention has a carbon roasting furnace top surface temperature of 75-80℃, which reduces the heat loss of the carbon roasting furnace top, achieves energy saving and consumption reduction, and reduces the production cost of anode carbon blocks; it also solves the problem that the existing carbon roasting furnace top insulation structure is caused by the on-site pouring of the carbon roasting furnace top. The material falls into the fire channel and the expansion joint cotton felt runs off course and deforms; at the same time, the strip carbon roasting furnace top insulation block prepared by the vibration forming machine improves the volume density and compressive strength of the strip carbon roasting furnace top insulation block, and improves the service life of the strip carbon roasting furnace top insulation block. After nearly one year of production and operation, the surface flatness of the strip carbon roasting furnace top insulation block of the carbon roasting furnace top insulation structure of the present invention has no obvious change. Compared with the existing carbon roasting furnace top insulation structure template-supported artificially cast carbon roasting furnace top insulation block, its appearance is smoother and more beautiful. The pressure resistance and high temperature resistance of the strip carbon roasting furnace top insulation block of the carbon roasting furnace top insulation structure of the present invention are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0009] Figure 1 , Figure 2 It is a structural schematic diagram of the thermal insulation structure of the top of the carbon roasting furnace of the present invention;

[0010] Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 It is a schematic diagram of the structure of the top insulation block of the strip carbon roasting furnace of the present invention;

[0011] In the attached drawings: 1. Cotton felt insulation layer, 2. Heavy castable prefabricated block insulation layer, 21. Strip carbon roasting furnace top insulation block, 211. Vertical flame-spraying channel, 212. Left inner concave groove, 213. Right inner concave groove, 214. Carbon roasting furnace top insulation block skeleton, 3. Refractory bricks with semicircular inner groove cross-sections are arranged on the upper and lower sides of the side facade, 4. High-alumina polyhydrogen insulation bricks. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below through specific examples.

[0013] Example 1

[0014] like Figure 1 ,picture, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a carbon roasting furnace roof insulation structure is characterized by: comprising a cotton felt insulation layer 1 and a heavy castable prefabricated block insulation layer 2 sequentially installed on the top of the carbon roasting furnace flue wall, the heavy castable prefabricated block insulation layer 2 comprising 1800 strip carbon roasting furnace top insulation blocks 21 sequentially installed on the cotton felt insulation layer 1; the cotton felt insulation layer is 50 mm thick, and the heavy castable prefabricated block insulation layer is 280 mm thick;

[0015] The center position of the top surface of the insulation block 21 on the top of the strip carbon roasting furnace is provided with a vertical flame-spraying channel 211 that passes through to the lower bottom surface. The left and right sides of the vertical flame-spraying channel 211 on the lower bottom surface of the insulation block 21 on the top of the strip carbon roasting furnace are respectively provided with a left inward concave groove 212 and a right inward concave groove 213 along the longitudinal center line. The insulation block 21 on the top of the strip carbon roasting furnace is 1290 mm long, 570 mm wide, and 270 mm high. The left inward concave groove 212 on the lower bottom surface of the insulation block 21 on the top of the strip carbon roasting furnace is 460 mm long and 100 mm wide. 230㎜, height 65㎜, the right concave groove 213 on the bottom surface of the strip carbon roasting furnace top insulation block 21 is 440㎜ long, 230㎜ wide, and 65㎜ high; the middle position of the strip carbon roasting furnace top insulation block 21 is cast with heavy casting material on the corresponding side facade, and two refractory bricks 3 with semicircular inner grooves on the upper and lower sides are provided with heavy casting material. Four high-alumina polyhydrogen insulation bricks 4 are cast and inlaid in the left and right concave grooves on the bottom surface of the strip carbon roasting furnace top insulation block 21.

[0016] A method for preparing a strip-shaped carbon roasting furnace top insulation block is as follows: a carbon roasting furnace top insulation block skeleton 214 is prepared in the same shape as the strip-shaped carbon roasting furnace top insulation block 21, and an inner concave groove is arranged on the bottom surface of the carbon roasting furnace top insulation block skeleton 214 along the longitudinal center line; a carbon roasting furnace top insulation block mold (not shown in the drawings of the specification) is arranged on a vibration table of a vibration molding machine (not shown in the drawings of the specification), and two refractory bricks 3 with semicircular inner grooves in cross section on the upper and lower corresponding side facades are placed close to each other on both sides of the transverse center line of the bottom of the carbon roasting furnace top insulation block mold box, and then the two refractory bricks 3 are placed on the upper and lower corresponding side facades, and the two refractory bricks 3 are placed on the lower and upper sides of the ... Place 4 high-aluminum polyhydrogen insulation bricks 4 in sequence along the longitudinal center line of the bottom of the insulation block mold box at the top of the carbon roasting furnace on the left and right sides of the two refractory bricks 3 with semicircular inner grooves in cross section on the corresponding side facades set on the bottom of the insulation block mold box at the top of the carbon roasting furnace, and place them close to the two refractory bricks 3 with semicircular inner grooves in cross section on the corresponding side facades on both sides of the transverse center line of the bottom of the insulation block mold box at the top of the carbon roasting furnace, with a gap for pouring heavy castables between them, and the two refractory bricks 3 with semicircular inner grooves in cross section on the corresponding side facades and the adjacent high-aluminum polyhydrogen insulation bricks on the left and right sides. There is a gap between the hydrogen insulation bricks 4 for pouring heavy castables, and there is a gap between the adjacent high-aluminum polyhydrogen insulation bricks 4 on the left and right sides of the bottom of the carbon roasting furnace top insulation block mold box. The carbon roasting furnace top insulation block skeleton 214 is buckled into the carbon roasting furnace top insulation block mold box, and the concave groove set on the bottom surface of the carbon roasting furnace top insulation block skeleton 214 buckled in the carbon roasting furnace top insulation block mold box is buckled on the corresponding side facades on both sides of the horizontal center line of the bottom of the carbon roasting furnace top insulation block mold box. The upper and lower inner grooves with a semicircular arc cross section Two refractory bricks 3, two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades, and four high-alumina polyhydrogen insulation bricks 4 on the left and right sides, the two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades are cast with heavy castables to form a vertical flame-spraying channel 211 that runs through the insulation block on the top of the strip carbon roasting furnace, and the heavy castables are used to cast and start the vibration molding machine to vibrate and shape the insulation block on the top of the strip carbon roasting furnace; the use of a vibration molding machine to prepare the insulation block 21 on the top of the strip carbon roasting furnace can improve the volume density and compressive strength of the insulation block on the top of the strip carbon roasting furnace.

[0017] Example 2

[0018] like Figure 1 ,picture, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, a carbon roasting furnace roof insulation structure is characterized by comprising a cotton felt insulation layer 1 and a heavy castable prefabricated block insulation layer 2 sequentially installed on the top of the carbon roasting furnace flue wall, wherein the heavy castable prefabricated block insulation layer 2 comprises 1800 strip carbon roasting furnace top insulation blocks 21 sequentially installed on the cotton felt insulation layer 1; the cotton felt insulation layer is 100 mm thick, and the heavy castable prefabricated block insulation layer is 270 mm thick;

[0019] The center position of the top surface of the insulation block 21 on the top of the strip carbon roasting furnace is provided with a vertical flame-spraying channel 211 that passes through to the lower bottom surface. The left and right sides of the vertical flame-spraying channel 211 on the lower bottom surface of the insulation block 21 on the top of the strip carbon roasting furnace are respectively provided with a left inward concave groove 212 and a right inward concave groove 213 along the longitudinal center line. The insulation block 21 on the top of the strip carbon roasting furnace is 1300 mm long, 580 mm wide, and 275 mm high. The left inward concave groove 212 on the lower bottom surface of the insulation block 21 on the top of the strip carbon roasting furnace is 465 mm long and 100 mm wide. 235㎜, height 70㎜, the right concave groove 213 on the bottom surface of the strip carbon roasting furnace top insulation block 21 is 445㎜ long, 235㎜ wide, and 70㎜ high; the middle position of the strip carbon roasting furnace top insulation block 21 is cast with heavy casting material on the corresponding side facade, and two refractory bricks 3 with semicircular inner grooves on the upper and lower sides are provided with heavy casting material. Four high-alumina polyhydrogen insulation bricks 4 are cast and inlaid in the left and right concave grooves on the bottom surface of the strip carbon roasting furnace top insulation block 21.

[0020] The preparation method of a strip-shaped carbon roasting furnace top insulation block is the same as above.

[0021] Through the above description, those skilled in the art can make various changes and modifications within the scope of the technical concept of the present invention without departing from the scope of the present invention. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A carbon roasting furnace roof insulation structure, characterized by: It includes a cotton felt insulation layer and a heavy castable prefabricated block insulation layer sequentially installed on the top of the carbon roasting furnace flue wall, wherein the heavy castable prefabricated block insulation layer includes at least 1800 strip-shaped carbon roasting furnace top insulation blocks sequentially installed on the cotton felt insulation layer; the cotton felt insulation layer has a thickness of 50-100 mm, and the heavy castable prefabricated block insulation layer has a thickness of 270-280 mm; The center position of the top surface of the insulation block on the top of the strip carbon roasting furnace is provided with a vertical flame-spraying channel that passes through to the lower bottom surface. The left and right sides of the vertical flame-spraying channel on the lower bottom surface of the insulation block on the top of the strip carbon roasting furnace are respectively provided with a left concave groove and a right concave groove along the longitudinal center line. The insulation block on the top of the strip carbon roasting furnace has a length of 1290-1300 mm, a width of 570-580 mm, and a height of 270-275 mm. The left concave groove on the lower bottom surface of the insulation block on the top of the strip carbon roasting furnace has a length of 460-465 mm and a width of 230-235 mm. ㎜, height 65-70㎜, the right concave groove on the bottom surface of the insulation block on the top of the strip carbon roasting furnace is 440-445㎜ long, 230-235㎜ wide, and 65-70㎜ high; the middle part of the insulation block on the top of the strip carbon roasting furnace is cast with heavy casting material, and two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades are provided with heavy casting material. The left and right concave grooves on the bottom surface of the insulation block on the top of the strip carbon roasting furnace are respectively cast and inlaid with 4 high-alumina polyhydrogen insulation bricks using heavy casting material.

2. The method for preparing a strip-shaped carbon roasting furnace top insulation block as claimed in claim 1 is as follows: prepare a carbon roasting furnace top insulation block skeleton that is in the same shape as the strip-shaped carbon roasting furnace top insulation block, and the bottom surface of the carbon roasting furnace top insulation block skeleton is provided with an inner concave groove along the longitudinal center line; a carbon roasting furnace top insulation block mold is provided on a vibration table of a vibration molding machine, and two refractory bricks with semicircular inner grooves in cross section on the upper and lower corresponding side facades are placed against each other on both sides of the transverse center line of the bottom of the carbon roasting furnace top insulation block mold box, and then four high-aluminum polyhydrogen insulation bricks are placed on each side. The two refractory bricks with semicircular inner grooves in cross section are placed on the corresponding side surfaces and lower surfaces set on the bottom of the carbon roasting furnace top insulation block mold box along the longitudinal center line of the bottom of the carbon roasting furnace top insulation block mold box in sequence on the left and right sides, and the two refractory bricks with semicircular inner grooves in cross section are placed on the corresponding side surfaces and lower surfaces on both sides of the transverse center line of the bottom of the carbon roasting furnace top insulation block mold box. There is a gap for pouring heavy castables between the two refractory bricks with semicircular inner grooves in cross section on the corresponding side surfaces and lower surfaces and the high-alumina polyhydrogen insulation bricks on the adjacent left and right sides. There is a gap for pouring heavy castables between the four high-aluminum polyhydrogen insulation bricks on the left and right sides of the bottom of the carbon roasting furnace top insulation block mold box. There is a gap for pouring heavy castables between the adjacent high-aluminum polyhydrogen insulation bricks. The carbon roasting furnace top insulation block skeleton is buckled into the carbon roasting furnace top insulation block mold box. The concave groove set on the bottom surface of the carbon roasting furnace top insulation block skeleton buckled in the carbon roasting furnace top insulation block mold box is buckled on the two pieces of semicircular inner grooves on the upper and lower corresponding side facades on both sides of the horizontal center line of the bottom of the carbon roasting furnace top insulation block mold box. Refractory bricks, two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades, and four high-alumina polyhydrogen insulation bricks on the left and right sides. The two refractory bricks with semicircular inner grooves on the upper and lower corresponding side facades are cast with heavy castables to form a vertical flame-spraying channel that runs through the insulation block on the top of the strip carbon roasting furnace. The heavy castables are used to cast and a vibration molding machine is started to vibrate and shape the insulation block on the top of the strip carbon roasting furnace; the use of a vibration molding machine to prepare the insulation block on the top of the strip carbon roasting furnace can improve the volume density and compressive strength of the insulation block on the top of the strip carbon roasting furnace.

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