CN112797797A - Furnace top heat preservation structure of carbon roasting furnace - Google Patents

Abstract

The invention discloses a furnace top heat preservation structure of a carbon roasting furnace. A furnace top heat preservation structure of a carbon roasting furnace comprises a cotton felt heat preservation layer and a heavy castable precast block heat preservation layer, wherein the heavy castable precast block heat preservation layer comprises at least 1800 strip-shaped carbon roasting furnace top heat preservation blocks which are sequentially arranged on the cotton felt heat preservation layer; 4 high-alumina hydrogen-accumulating heat-insulating bricks are poured and embedded in the left concave groove and the right concave groove of the lower bottom surface of the heat-insulating block at the top of the strip-shaped carbon roasting furnace respectively and sequentially by using heavy pouring materials. The invention reduces the heat loss at the top of the carbon roasting furnace, realizes energy saving and consumption reduction, and reduces the production cost of the anode carbon block; the problem that materials fall into a flame path and a swelling gap cotton felt deviates and deforms due to cast-in-place of the top of the carbon roasting furnace in the existing top heat preservation structure of the carbon roasting furnace is solved; the service life of the heat preservation block part at the top of the bar-shaped carbon roasting furnace is prolonged.

Description

Furnace top heat preservation structure of carbon roasting furnace

Technical Field

The invention belongs to a carbon roasting furnace, in particular to a furnace top heat preservation structure of the carbon roasting furnace.

Background

The top heat preservation structure of the existing carbon roasting furnace generally adopts two modes: the first method is that after the top of a flame path brick is sealed, a corresponding heat preservation cotton felt is paved, then the formwork is erected according to the length and width of the flame path, and then a part framework is placed and fixed according to the specified position and then a heavy castable is poured; and secondly, drawing design is carried out according to the length and width of the flame path and the position of a flame path reserved hole, a carbon roasting furnace top heat-insulating block is manufactured at a place outside a construction site according to drawing size requirements, the casting place is transferred out of the construction site, the casting mode is changed from in-situ casting to off-site prefabrication, and a circular hole is formed in the position of the carbon roasting furnace top heat-insulating block reserved hole and spliced by refractory clay bricks. The furnace top heat-insulating structures of the two carbon roasting furnaces have certain defects: the first cast-in-place carbon roasting furnace top heat preservation structure can not completely ensure that the center distance of each carbon roasting furnace top heat preservation block after casting is completed is within an error range, and the phenomena of deformation and deviation of a dilatation joint cotton felt between the carbon roasting furnace top heat preservation block and the carbon roasting furnace top heat preservation block when the castable is vibrated by a construction appliance manually and the phenomenon that the material falls into a flame path and cannot be cleaned due to cast-in-place (containing water in the castable) are found in the throughout-year furnace construction project. Although the second off-site prefabricated part solves the problems of material falling into a flame path and deflection and deformation of the expansion joint cotton felt caused by cast-in-place and also prevents the phenomenon that castable inside the heat preservation block at the top of the carbon roasting furnace drops off due to high-temperature radiation of flame, the hole position of the heat preservation block at the top of the carbon roasting furnace is spliced with a round hole by using refractory adhesive and soil bricks, but the problem of heat loss at the top of the carbon roasting furnace cannot be solved, and the actually measured temperature at the top of the carbon roasting furnace is usually 100-plus-120 ℃ in the workshop operation process. The problems that materials fall into a flame path and a swelling gap cotton felt is deflected and deformed due to cast-in-place of the top of a carbon roasting furnace can be solved, the heat loss of the top of the carbon roasting furnace is reduced, energy conservation and consumption reduction are realized, and the production cost of an anode carbon block is reduced are solved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a furnace top heat preservation structure of a carbon roasting furnace. The heat preservation structure of the furnace top of the carbon roasting furnace can solve the problems that materials fall into a flame path and a swelling gap cotton felt deviates and deforms due to cast-in-place of the furnace top of the carbon roasting furnace; the heat loss at the top of the carbon roasting furnace can be reduced, the energy conservation and consumption reduction are realized, and the production cost of the anode carbon block is reduced.

The technical scheme for solving the technical problems is as follows: the utility model provides a carbon bakes burning furnace roof insulation construction over a slow fire, characterized by: the insulation layer comprises a cotton felt insulation layer and a heavy castable precast block insulation layer which are sequentially arranged on the top of a flue wall of the carbon roasting furnace, wherein the heavy castable precast block insulation layer comprises at least 1800 strip-shaped carbon roasting furnace top insulation blocks which are sequentially arranged on the cotton felt insulation layer; the thickness of the cotton felt heat-insulating layer is 50-100 mm, and the thickness of the heavy castable precast block heat-insulating layer is 270-280 mm;

the center of the top surface of the top heat-insulating block of the bar-shaped carbon roasting furnace is provided with a vertical flame-spraying channel which penetrates through to the lower bottom surface, the left side and the right side of the vertical flame-spraying channel of the lower bottom surface of the top heat-insulating block of the bar-shaped carbon roasting furnace are respectively provided with a left inner concave groove and a right inner concave groove along the longitudinal central line, the length of the top heat-insulating block of the bar-shaped carbon roasting furnace is 1290-; the middle position of the top heat-insulating block of the strip-shaped carbon roasting furnace is poured with 2 refractory bricks with semi-arc-shaped cross sections arranged above and below the corresponding side vertical surfaces by using heavy pouring materials, and the left inner concave groove and the right inner concave groove of the bottom surface of the top heat-insulating block of the strip-shaped carbon roasting furnace are respectively poured and embedded with 4 high-alumina poly-hydrogen insulating bricks by using heavy pouring materials in sequence.

The preparation method of the top heat-insulating block of the strip-shaped carbon roasting furnace comprises the following steps: preparing a carbon roasting furnace top heat-preservation block framework following the shape of a strip-shaped carbon roasting furnace top heat-preservation block, wherein the lower bottom surface of the carbon roasting furnace top heat-preservation block framework is provided with an inward concave groove along the longitudinal center line; the vibration forming machine is provided with a vibration table on which a carbon roasting furnace top heat preservation block die is arranged, 2 refractory bricks with semicircular inner grooves in cross section are arranged on the upper and lower parts of the corresponding side vertical faces and are attached to and placed on two sides of the transverse central line of the bottom of the carbon roasting furnace top heat preservation block die, 4 high-alumina poly-hydrogen insulation bricks are respectively placed on the left and right sides of the corresponding side vertical faces arranged on the bottom of the carbon roasting furnace top heat preservation block die along the longitudinal central line of the bottom of the carbon roasting furnace top heat preservation block die in sequence, 2 refractory bricks with semicircular inner grooves in cross section are arranged on the upper and lower parts of the corresponding side vertical faces, gaps are formed between the 2 refractory bricks with semicircular inner grooves in cross section and placed on the upper and lower parts of the corresponding side vertical faces, 2 refractory bricks with semicircular inner grooves in cross section are poured on the corresponding side vertical faces, and the gap is formed between the adjacent left refractory bricks, Gaps for pouring heavy castable are formed between the high-alumina hydrogen-accumulating heat-insulating bricks on the right two sides, gaps for pouring heavy castable are formed between adjacent high-alumina hydrogen-accumulating heat-insulating bricks of 4 high-alumina hydrogen-accumulating heat-insulating bricks on the left side and the right side of the bottom of a carbon roasting furnace top heat-insulating block mould box, a carbon roasting furnace top heat-insulating block framework is buckled in the carbon roasting furnace top heat-insulating block mould box, concave grooves arranged on the lower bottom surface of the carbon roasting furnace top heat-insulating block framework buckled in the carbon roasting furnace top heat-insulating block mould box are buckled on corresponding side vertical surfaces on two sides of the transverse central line of the bottom of the carbon roasting furnace top heat-insulating block mould box, 2 refractory bricks with semi-circular arc-shaped cross sections are arranged on the corresponding side vertical surfaces, 4 high-alumina hydrogen-accumulating heat-insulating bricks on the left side and the right side of the 2 refractory bricks with semi-circular-arc-shaped cross, An inner groove with a semicircular cross section is formed in the lower part of the bar-shaped carbon roasting furnace, a vertical flame path penetrating through a heat preservation block at the top of the bar-shaped carbon roasting furnace is formed by pouring heavy castable, and the bar-shaped carbon roasting furnace top heat preservation block is formed by pouring the heavy castable and starting a vibration forming machine in a vibration mode; the vibration forming machine is used for preparing the top heat-insulating block of the bar-shaped carbon roasting furnace, so that the volume density and the compressive strength of the top heat-insulating block of the bar-shaped carbon roasting furnace can be improved.

The invention has the beneficial effects that: the invention is provided with a cotton felt heat preservation layer and a heavy castable precast block heat preservation layer which are sequentially arranged on the top of a flue wall of a carbon roasting furnace, wherein the heavy castable precast block heat preservation layer comprises at least 1800 strip-shaped carbon roasting furnace top heat preservation blocks which are sequentially arranged on the cotton felt heat preservation layer, a vertical flame path which penetrates to the lower bottom surface is arranged in the center of the top surface of the strip-shaped carbon roasting furnace top heat preservation block, inner concave grooves are respectively arranged on the left side and the right side of the vertical flame path of the lower bottom surface of the strip-shaped carbon roasting furnace top heat preservation block along the longitudinal central line, and 4 high-aluminum poly-hydrogen insulating bricks are respectively poured and embedded in the left inner concave groove and the right inner concave groove of the lower bottom surface of the strip-. Through detection, the high-aluminum hydrogen-accumulating heat-insulating brick is adopted as a pouring and inlaying lining heat-insulating layer reserved in the left and right concave grooves of the heat-insulating block at the top of the strip-shaped carbon roasting furnace, so that a good heat-insulating effect is achieved, and compared with the existing heat-insulating structure at the top of the carbon roasting furnace, the actually measured temperature of the top surface of the carbon roasting furnace is 100-120 ℃ when the temperature of a flame path reaches 1250 ℃, the actually measured temperature of the top surface of the carbon roasting furnace is 75-80 ℃ when the temperature of the flame path reaches 1250 ℃, so that the heat loss at the top of the carbon roasting furnace is reduced, the energy conservation and consumption reduction are realized, and the production cost of; the problem that materials fall into a flame path and a swelling gap cotton felt deviates and deforms due to cast-in-place of the top of the carbon roasting furnace in the existing top heat preservation structure of the carbon roasting furnace is solved; meanwhile, the volume density and the compressive strength of the thermal insulation block at the top of the bar-shaped carbon roasting furnace are improved and the service life of a thermal insulation block part at the top of the bar-shaped carbon roasting furnace is prolonged by using the thermal insulation block at the top of the bar-shaped carbon roasting furnace prepared by the vibration forming machine.

Drawings

The invention is further explained below with reference to the figures and examples;

FIG. 1 and FIG. 2 are schematic structural views of a top heat-insulating structure of a carbon roasting furnace according to the present invention;

FIG. 3, FIG. 4, FIG. 5, FIG. 6 and FIG. 7 are schematic structural views of a top insulating block of a strip-shaped carbon baking furnace according to the present invention;

in the drawings: 1. the composite insulation board comprises a cotton felt insulation layer, a 2. heavy castable precast block insulation layer, a 21. strip-shaped carbon roasting furnace top insulation block, a 211. vertical flame path, 212. left inner concave groove, 213. right inner concave groove, 214. carbon roasting furnace top insulation block framework, and 3. side elevation upper and lower parts are provided with a fireproof brick with a semicircular arc-shaped cross section inner groove and a 4. high-alumina hydrogen-gathering insulation brick.

Detailed Description

The present invention is described in further detail below with reference to specific examples.

Example 1

As shown in fig. 1, 3, 4, 5, 6 and 7, a heat insulating structure of a furnace top of a carbon baking furnace is characterized in that: the insulation layer 2 comprises 1800 strip-shaped carbon baking furnace top insulation blocks 21 which are sequentially arranged on the cotton felt insulation layer 1; the thickness of the cotton felt insulation layer is 50 mm, and the thickness of the heavy castable precast block insulation layer is 280 mm;

the center of the top surface of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace is provided with a vertical fire-spraying channel 211 which penetrates through to the lower bottom surface, the left and right sides of the vertical fire-spraying channel 211 of the lower bottom surface of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace are respectively provided with a left inner concave groove 212 and a right inner concave groove 213 along the longitudinal central line, the length of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace is 1290 mm, the width of the top heat-preserving block is 570 mm, the height of the top heat-preserving block is 270 mm, the length of the left inner concave groove 212 of the lower bottom surface of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace is 460 mm, the width of the top heat-preserving block is 230 mm, the height; the middle position of the top heat-insulating block 21 of the strip-shaped carbon roasting furnace is poured with heavy pouring materials, 2 refractory bricks 3 with semicircular arc-shaped cross sections are arranged above and below the corresponding side vertical surfaces, and 4 high-alumina hydrogen-accumulating heat-insulating bricks 4 are poured and embedded in the left inner concave groove and the right inner concave groove of the lower bottom surface of the top heat-insulating block 21 of the strip-shaped carbon roasting furnace respectively and sequentially with the heavy pouring materials.

A preparation method of a top heat-insulating block of a strip-shaped carbon roasting furnace comprises the following steps: preparing a carbon roasting furnace top heat-insulating block framework 214 following the shape of the strip-shaped carbon roasting furnace top heat-insulating block 21, wherein the lower bottom surface of the carbon roasting furnace top heat-insulating block framework 214 is provided with an inward concave groove along the longitudinal center line; a vibration table of a vibration forming machine (not shown in the attached drawing of the specification) is provided with a carbon roasting furnace top heat preservation block mould (not shown in the attached drawing of the specification), 2 refractory bricks 3 with semicircular inner grooves in cross section are arranged on the upper side and the lower side of the corresponding side elevation and are attached to the two sides of the transverse central line of the bottom of the carbon roasting furnace top heat preservation block mould, 4 high-aluminum poly-hydrogen insulating bricks 4 are respectively and sequentially arranged on the corresponding side elevation arranged on the bottom of the carbon roasting furnace top heat preservation block mould along the longitudinal central line of the bottom of the carbon roasting furnace top heat preservation block mould, the left side and the right side of the 2 refractory bricks 3 with semicircular inner grooves in cross section are arranged on the lower side elevation, gaps formed by pouring heavy refractory bricks are arranged between the 2 refractory bricks 3 with semicircular inner grooves in cross section and attached to the corresponding side elevation on the two sides of the transverse central line of the bottom of the carbon roasting furnace top heat preservation, Gaps for pouring heavy castable are arranged between 2 refractory bricks 3 with semicircular inner grooves in cross sections at the upper and lower parts of corresponding side elevation and adjacent high-alumina hydrogen-accumulating heat-insulating bricks 4 at the left and right sides, gaps for pouring heavy castable are arranged between the adjacent high-alumina hydrogen-accumulating heat-insulating bricks 4 at the left and right sides of the heat-insulating block mould box at the top of the carbon roasting furnace, a heat-insulating block framework 214 at the top of the carbon roasting furnace is buckled in the heat-insulating block mould box at the top of the carbon roasting furnace, concave grooves arranged at the bottom surface of the lower roasting furnace and the heat-insulating block framework 214 at the top of the carbon roasting furnace in the heat-insulating block mould box at the top of the carbon roasting furnace are buckled in corresponding side elevations at the two sides of the transverse center line of the heat-insulating block mould box at the top of the carbon roasting furnace, 2 refractory bricks 3 with semicircular inner grooves in cross sections at the upper and lower parts of the corresponding side elevations, 2 left refractory bricks 3 with, 4 high-alumina poly-hydrogen insulating bricks 4 on the right two sides, 2 refractory bricks corresponding to the side elevation are provided with inner grooves with semicircular cross sections at the upper and lower parts, and the inner grooves are poured by heavy castable to form a vertical flame path 211 which runs through the top insulating block of the bar-shaped carbon roasting furnace; the vibration forming machine is used for preparing the top heat-insulating block 21 of the bar-shaped carbon roasting furnace, so that the volume density and the compressive strength of the top heat-insulating block of the bar-shaped carbon roasting furnace can be improved.

Example 2

As shown in fig. 1, 3, 4, 5, 6 and 7, a heat insulating structure of a furnace top of a carbon baking furnace is characterized in that: the insulation layer 2 comprises 1800 strip-shaped carbon baking furnace top insulation blocks 21 which are sequentially arranged on the cotton felt insulation layer 1; the thickness of the cotton felt insulating layer is 100 mm, and the thickness of the heavy castable precast block insulating layer is 270 mm;

the center of the top surface of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace is provided with a vertical fire-spraying channel 211 which penetrates through to the lower bottom surface, the left side and the right side of the vertical fire-spraying channel 211 of the lower bottom surface of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace are respectively provided with a left inner concave groove 212 and a right inner concave groove 213 along the longitudinal central line, the length of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace is 1300 mm, the width of the top heat-preserving block is 580 mm, the height of the top heat-preserving block is 275 mm, the length of the left inner concave groove 212 of the lower bottom surface of the top heat-preserving block 21 of the bar-shaped carbon roasting furnace is 465 mm, the width of the left inner concave groove is 235 mm, the; the middle position of the top heat-insulating block 21 of the strip-shaped carbon roasting furnace is poured with heavy pouring materials, 2 refractory bricks 3 with semicircular arc-shaped cross sections are arranged above and below the corresponding side vertical surfaces, and 4 high-alumina hydrogen-accumulating heat-insulating bricks 4 are poured and embedded in the left inner concave groove and the right inner concave groove of the lower bottom surface of the top heat-insulating block 21 of the strip-shaped carbon roasting furnace respectively and sequentially with the heavy pouring materials.

The preparation method of the top heat-insulating block of the strip-shaped carbon roasting furnace is the same as the above.

From the above description, those skilled in the art can make various changes and modifications within the scope of the technical idea of the present invention without departing from the scope of the invention. The present invention is not limited to the details given herein, but is within the ordinary knowledge of those skilled in the art.

Claims (2)

1. The utility model provides a carbon bakes burning furnace roof insulation construction over a slow fire, characterized by: the insulation layer comprises a cotton felt insulation layer and a heavy castable precast block insulation layer which are sequentially arranged on the top of a flue wall of the carbon roasting furnace, wherein the heavy castable precast block insulation layer comprises at least 1800 strip-shaped carbon roasting furnace top insulation blocks which are sequentially arranged on the cotton felt insulation layer; the thickness of the cotton felt heat-insulating layer is 50-100 mm, and the thickness of the heavy castable precast block heat-insulating layer is 270-280 mm;

the center of the top surface of the top heat-insulating block of the bar-shaped carbon roasting furnace is provided with a vertical flame-spraying channel which penetrates through to the lower bottom surface, the left side and the right side of the vertical flame-spraying channel of the lower bottom surface of the top heat-insulating block of the bar-shaped carbon roasting furnace are respectively provided with a left inner concave groove and a right inner concave groove along the longitudinal central line, the length of the top heat-insulating block of the bar-shaped carbon roasting furnace is 1290-; the middle position of the top heat-insulating block of the strip-shaped carbon roasting furnace is poured with 2 refractory bricks with semi-arc-shaped cross sections arranged above and below the corresponding side vertical surfaces by using heavy pouring materials, and the left inner concave groove and the right inner concave groove of the bottom surface of the top heat-insulating block of the strip-shaped carbon roasting furnace are respectively poured and embedded with 4 high-alumina poly-hydrogen insulating bricks by using heavy pouring materials in sequence.

2. The method for preparing the top heat-insulating block of the strip-shaped carbon baking furnace according to claim 1 comprises the following steps: preparing a carbon roasting furnace top heat-preservation block framework following the shape of a strip-shaped carbon roasting furnace top heat-preservation block, wherein the lower bottom surface of the carbon roasting furnace top heat-preservation block framework is provided with an inward concave groove along the longitudinal center line; the vibration forming machine is provided with a vibration table on which a carbon roasting furnace top heat preservation block die is arranged, 2 refractory bricks with semicircular inner grooves in cross section are arranged on the upper and lower parts of the corresponding side vertical faces and are attached to and placed on two sides of the transverse central line of the bottom of the carbon roasting furnace top heat preservation block die, 4 high-alumina poly-hydrogen insulation bricks are respectively placed on the left and right sides of the corresponding side vertical faces arranged on the bottom of the carbon roasting furnace top heat preservation block die along the longitudinal central line of the bottom of the carbon roasting furnace top heat preservation block die in sequence, 2 refractory bricks with semicircular inner grooves in cross section are arranged on the upper and lower parts of the corresponding side vertical faces, gaps are formed between the 2 refractory bricks with semicircular inner grooves in cross section and placed on the upper and lower parts of the corresponding side vertical faces, 2 refractory bricks with semicircular inner grooves in cross section are poured on the corresponding side vertical faces, and the gap is formed between the adjacent left refractory bricks, Gaps for pouring heavy castable are formed between the high-alumina hydrogen-accumulating heat-insulating bricks on the right two sides, gaps for pouring heavy castable are formed between adjacent high-alumina hydrogen-accumulating heat-insulating bricks of 4 high-alumina hydrogen-accumulating heat-insulating bricks on the left side and the right side of the bottom of a carbon roasting furnace top heat-insulating block mould box, a carbon roasting furnace top heat-insulating block framework is buckled in the carbon roasting furnace top heat-insulating block mould box, concave grooves arranged on the lower bottom surface of the carbon roasting furnace top heat-insulating block framework buckled in the carbon roasting furnace top heat-insulating block mould box are buckled on corresponding side vertical surfaces on two sides of the transverse central line of the bottom of the carbon roasting furnace top heat-insulating block mould box, 2 refractory bricks with semi-circular arc-shaped cross sections are arranged on the corresponding side vertical surfaces, 4 high-alumina hydrogen-accumulating heat-insulating bricks on the left side and the right side of the 2 refractory bricks with semi-circular-arc-shaped cross, An inner groove with a semicircular cross section is formed in the lower part of the bar-shaped carbon roasting furnace, a vertical flame path penetrating through a heat preservation block at the top of the bar-shaped carbon roasting furnace is formed by pouring heavy castable, and the bar-shaped carbon roasting furnace top heat preservation block is formed by pouring the heavy castable and starting a vibration forming machine in a vibration mode; the vibration forming machine is used for preparing the top heat-insulating block of the bar-shaped carbon roasting furnace, so that the volume density and the compressive strength of the top heat-insulating block of the bar-shaped carbon roasting furnace can be improved.

Images