CN214950619U - 81000KVA calcium carbide furnace structure - Google Patents

Abstract

The application discloses 81000KVA calcium carbide furnace structure, which comprises a furnace body, one side of furnace body is equipped with the furnace gate mounting hole, the bottom sprag brick has been laid to the bottom of furnace gate mounting hole, the bottom sprag brick upper berth is equipped with bottom furnace door brick, the upper end of bottom furnace door brick is equipped with silo on the arc, the upper end both sides of bottom furnace door brick all are fixed with the side brick, the both sides of silo on a plurality of side bricks are located the arc, furnace gate supporting brick has been laid to the upper end of side brick, the lower extreme of furnace gate supporting brick is equipped with the stopper, the stopper is located between the side brick of both sides, top furnace door brick has been laid to the upper end of furnace gate supporting brick, top supporting brick has been laid to the upper end of top furnace door brick, the pouring has the high-strength high alumina casting material between the top of top supporting brick to the top of furnace gate mounting hole. The utility model discloses a to the design of furnace body, the degree of difficulty when having reduced the construction, the condition that can also effectual control during operation ferrosilicon infiltration and electric stove scurry the iron takes place, and the wholeness ability of furnace body promotes, has improved the life of furnace body.

Description

81000KVA calcium carbide furnace structure

Technical Field

The utility model relates to a carbide production technical field especially relates to a 81000KVA carbide furnace structure.

Background

The calcium carbide furnace is the main equipment for producing calcium carbide. The furnace burden is melted and reacted to generate calcium carbide in the calcium carbide furnace due to the high temperature emitted by the electric arc. Since the reaction temperature is as high as 2000 ℃ or higher, the high temperature is hard to bear by the general refractory material. The volume of the furnace body must be larger than the reaction space. Namely, a layer of furnace charge is reserved between the reaction zone and the furnace lining to protect the furnace lining, but the furnace lining structure and material selection of the calcium carbide furnace in China are insufficient in reasonable material selection, the furnace lining building construction process is backward, the furnace lining is seriously damaged, the service life of the furnace is short, the service life of the furnace lining is short, the operation rate is low, the energy consumption is high, and the productivity is low;

particularly, in the structure of the 81000KVA calcium carbide furnace, the main problems are that in the specific production and maintenance process; firstly, the carbon blocks shrink and the brickwork joints are enlarged in the production process, so that the lining is poor in integrity and low in strength, ferrosilicon cannot be resisted to permeate into the bottom of the furnace, the brickwork is damaged, even the lining is burnt through, a malignant burning-through accident occurs, and the service cycle of the electric furnace is short; secondly, various special-shaped bricks have multiple shapes, construction is difficult, and construction quality is difficult to guarantee. In addition, the gap of the conical section is large, and the weight of the conical section is more and more prominent when going to the upper section, so that the whole outer inclined lower bed is caused, the brick layer is deformed, and the stability of the upper furnace door brick is influenced; the furnace door brick and the arc wall brick of the third straight section can not be jointed, so that the 1.6-meter high areas on the two sides of the furnace door brick are communicated with the wall brick, a weak link is formed, the iron channeling of the electric furnace is easily caused, the production is influenced, the above factors are main factors for reducing the service life of the furnace body, and therefore the 81000KVA calcium carbide furnace structure is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

The application provides an 81000KVA carbide stove structure, has solved 81000KVA carbide stove ferrosilicon infiltration and has leaded to the furnace lining to burn through and stove bottom edge special-shaped brick type is many, the construction difficulty, the big problem in clearance of outer conic section.

The application provides an 81000KVA calcium carbide furnace structure, which comprises a furnace body, one side of the furnace body is provided with a furnace door mounting hole, bottom supporting bricks are laid at the bottom of the furnace door mounting hole, bottom door bricks are laid on the bottom supporting bricks, a chute is arranged at the upper end of the bottom door bricks, side bricks are fixed on both sides of the upper end of the bottom door bricks, a plurality of side bricks are arranged on both sides of the chute, furnace door supporting bricks are laid at the upper ends of the side bricks, a limiting block is arranged at the lower end of the furnace door supporting bricks, the limiting block is arranged between the side bricks at both sides, a top door brick is laid at the upper end of the furnace door supporting bricks, top supporting bricks are laid at the upper ends of the top door bricks, high-strength high-alumina casting materials are poured between the tops of the top supporting bricks and the tops of the furnace door mounting hole, two layers of prebaked carbon blocks are laid at the bottom in the furnace body, the upper end of the pre-baked carbon block is paved with a self-baked carbon block, and corundum castable is filled between the asbestos plate and the high-alumina bricks at the inclined plane of the bottom of the furnace body.

Preferably, the upper end of the furnace door supporting brick is arc-shaped, the bottom of the top furnace door brick is provided with an arc-shaped limiting groove, and the upper end of the furnace door supporting brick is positioned in the arc-shaped limiting groove.

Preferably, the bottom supporting brick, the bottom furnace door brick, the side brick, the furnace door supporting brick, the top furnace door brick and the top supporting brick are all composite brown corundum bricks.

Preferably, the low-temperature coarse seam paste is paved on the self-baking carbon blocks.

Preferably, one side of the upper end of the furnace body is provided with an inspection hole.

Preferably, the outer side of the bottom furnace door brick at the outermost side is provided with a mounting groove.

According to the technical scheme, the application provides an 81000KVA calcium carbide furnace structure, when a furnace body works, the uppermost self-baking carbon block in the furnace body can be gradually baked into a solid, compact and strong-integrity carbon furnace lining by utilizing heat in the production process, the seam strength exceeds the seam strength of the baking carbon block by multiple times, so that the integral strength of the furnace lining is greatly improved, the furnace lining has the characteristics of good high-temperature strength, good thermal conductivity, difficult slag and iron adhesion and good chemical corrosion resistance, the phenomenon of iron infiltration of a baking block is effectively solved, a corundum castable filled between a asbestos plate and a high-alumina brick at the inclined plane at the bottom of the furnace body can reduce the construction difficulty, the corundum castable is poured once, compacted and compacted in the furnace shell, good bearing performance can be avoided, the cracking and the subsidence of bricks can be avoided, the stability under the furnace door bricks can be ensured, the design of the furnace door bricks is realized, the bricks are integrally layered prebaked, and connecting stubbles are arranged on two sides, and the wall body is constructed in a staggered joint mode to form a whole.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the self-baking carbon blocks are baked into a solid, compact and strong-integrity carbon furnace lining by utilizing production heat, the integrity of a furnace body is improved, and the service life of the furnace lining is prolonged by more than 1 time compared with the pre-baking carbon blocks;

2. by using the corundum castable, the construction difficulty is reduced in the construction stage, the furnace shell is compacted by one-time pouring, the bearing performance is good, and the stability under the furnace door brick can be ensured;

3. through the design of the furnace door, the whole body is pre-built in layers, the joint bricks are arranged on two sides and are built with the wall body in staggered joints to form a whole body, the formation of through joints is reduced, and the phenomenon of iron channeling of the electric furnace is reduced.

To sum up, the utility model discloses a to the design of furnace body, the degree of difficulty when having reduced the construction, the condition that can also effectual control during operation ferrosilicon infiltration and electric stove scurry iron takes place, and the wholeness ability of furnace body promotes, has improved the life of furnace body.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of an 81000KVA calcium carbide furnace structure provided by the present invention;

FIG. 2 is a schematic view of a door brick structure of an 81000KVA calcium carbide furnace structure provided by the present invention;

fig. 3 is a schematic view of a furnace door brick mounting structure of an 81000KVA calcium carbide furnace structure provided by the utility model;

in the figure: 1 furnace body, 2 high-strength high-alumina casting materials, 3 corundum casting materials, 4 pre-baked carbon blocks, 5 self-baked carbon blocks, 6 inspection holes, 7 top supporting bricks, 8 top furnace door bricks, 9 arc-shaped limiting grooves, 10 furnace door supporting bricks, 11 side bricks, 12 arc-shaped feeding grooves, 13 bottom furnace door bricks, 14 bottom supporting bricks, 15 mounting grooves and 16 limiting blocks.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1-3, an 81000KVA calcium carbide furnace structure comprises a furnace body 1, the furnace body 1 is composed of an external steel shell, an asbestos plate laid on the steel shell and high-alumina bricks laid on an asbestos screen, an inspection hole 6 is formed in one side of the upper end of the furnace body 1, a square hole with the size of the inspection hole 6 being 1240mm is formed in the inspection hole, a furnace door mounting hole is formed in one side of the furnace body 1 and used for mounting a furnace door, bottom supporting bricks 14 are laid at the bottom of the furnace door mounting hole, the bottom supporting bricks 14 are laid at the bottom of the furnace door mounting hole through high-strength high-alumina casting materials, bottom furnace door bricks 13 are laid on the bottom supporting bricks 14, an arc-shaped feeding chute 12 is formed in the upper end of each bottom furnace door brick 13 and used for feeding in the furnace body 1, a mounting groove 15 is formed in the outer side of the bottom furnace door brick 13 at the outermost side and used for mounting a discharging tool, side bricks 11 are fixed on both sides of the upper end of each bottom furnace door brick 13, and a plurality of the side bricks 11 are positioned on both sides of the arc-shaped feeding chute 12, the side bricks 11 on two sides can be arranged in a staggered way with bricks on the wall side wall of the furnace door mounting hole, furnace door supporting bricks 10 are laid at the upper ends of the brick body side bricks 11, the lower ends of the furnace door supporting bricks 10 are provided with limit blocks 16, the limit blocks 16 are positioned between the side bricks 11 on two sides, brick surface gaps are changed, erosion to the bricks between the gaps is reduced, the service life of the furnace door is prolonged, top furnace door bricks 8 are laid at the upper ends of the furnace door supporting bricks 10, the furnace door mounting hole is T-shaped and is connected through the top furnace door bricks 8, the upper ends of the furnace door supporting bricks 10 are arranged in an arc shape, arc-shaped limit grooves 9 are arranged at the bottom of the top furnace door bricks 8, the upper ends of the furnace door supporting bricks 10 are positioned in the arc-shaped limit grooves 9 and are not easy to deform, top supporting bricks 7 are laid at the upper ends of the top furnace door bricks 8, multilayer bricks are adopted and are arranged in a staggered way, so that the formation of through seams is reduced, the phenomenon of iron mixing of the electric furnace is reduced, and the construction is convenient, the bottom supporting brick 14, the bottom furnace door brick 13, the side brick 11, the furnace door supporting brick 10, the top furnace door brick 8 and the top supporting brick 7 are all composite brown corundum bricks, and a high-strength high-alumina castable 2 is poured between the top of the top supporting brick 7 and the top of the furnace door mounting hole, so that the furnace door is high in pressure resistance and high temperature resistance and also has excellent alkaline corrosion resistance;

the bottom in the furnace body 1 is paved with two layers of pre-baked carbon blocks 4, the furnace bottom of 81000KVA calcium carbide furnace is totally three layers of carbon bricks, the diameter is 10410mm, the size of a single brick is 400mm multiplied by 1200mm, the main raw materials of the pre-baked carbon blocks are anthracite and metallurgical coke, after extrusion forming, roasting is carried out for a period of time at 1250 ℃, volatile matters in coal and asphalt are removed during the period to form a stable shape, but the carbon blocks shrink and the building seams are enlarged in the production process, so that the furnace lining integrity is poor, the strength is low, the ferrosilicon cannot be resisted to permeate the furnace bottom, the masonry is damaged, even the furnace lining is burnt through, a malignant burn-through accident occurs, the service cycle of the electric furnace is short, the self-baked carbon blocks 5 are paved at the upper ends of the pre-baked carbon blocks 4, the heat in the production process can be gradually roasted into a solid, compact and strong-integrity carbon furnace lining, the seam strength exceeds the seam strength of the roasted carbon blocks by a plurality of times, thereby greatly improving the overall strength of the furnace lining, the strength of the self-baking carbon block 5 formed by 'continuously baking and graphitizing' in an electric furnace is up to 300MPa, the graphitization degree is up to 85 percent, 95 percent of the performance of the graphite carbon block is special, the performance of the graphite carbon block is good, the thermal conductivity is good, the slag and iron are not easy to stick, the chemical corrosion resistance is good, various physical and chemical properties after baking reach or exceed the pre-baking carbon block 4, the bonding strength of masonry joints is several times higher than the joint strength of the baking carbon block, when repairing the furnace, the self-baking carbon block 5 forms a seamless whole after high-temperature baking, the iron-seeping phenomenon of the baking block is effectively solved, the service life of a furnace lining is prolonged by more than 1 time than that of the pre-baking carbon block, low-temperature rough joint paste is paved on the self-baking carbon block 5 to play a filling role, corundum castable 3 is filled between a asbestos plate and a high-alumina brick at the inclined plane at the bottom of the furnace body 1, before corundum castable 3 is not used, various special-shaped bricks are of multiple brick types, construction is difficult, construction quality is difficult to guarantee, in addition, the gap of a conical section is large, the weight of the section is more and more prominent than that of the upper section, the whole outer oblique lower bed is caused, brick layers deform, the stability of the upper furnace door brick is influenced, the corundum castable 3 is poured at one time, the furnace shell is compacted, bearing performance is good, bricks can be prevented from cracking and collapsing, and the stability under the furnace door brick can be guaranteed.

According to the technical scheme, when the furnace body 1 works, the uppermost self-baking carbon block 5 in the furnace body 1 can be gradually baked into a solid, compact and strong-integrity carbon furnace lining by utilizing heat in the production process, the seam strength exceeds the seam strength of the baked carbon block by multiple times, so that the integral strength of the furnace lining is greatly improved, the furnace lining has the characteristics of good high-temperature strength, good heat conductivity, difficult slag and iron adhesion and good chemical corrosion resistance, the phenomenon of iron seepage of a baking block is effectively solved, a corundum castable 3 filled between a asbestos plate and a high-alumina brick at the inclined plane at the bottom of the furnace body 1 can reduce the construction difficulty, the corundum castable 3 is poured once, a furnace shell is compacted and has good bearing performance, bricks can be prevented from cracking and collapsing, the stability under the furnace door bricks can be ensured, the design of the furnace door bricks is realized, the furnace door bricks are integrally and prebaked in layers, connecting bricks are arranged on two sides and are staggered-jointed with a wall body, forming a whole.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.

Claims (6)

1. The utility model provides an 81000KVA calcium carbide furnace structure, includes furnace body (1), its characterized in that: one side of furnace body (1) is equipped with the furnace gate mounting hole, bottom sprag brick (14) have been laid to the bottom of furnace gate mounting hole, bottom sprag brick (14) upper berth is equipped with bottom furnace door brick (13), silo (12) on the upper end of bottom furnace door brick (13) is equipped with the arc, the upper end both sides of bottom furnace door brick (13) all are fixed with side brick (11), and are a plurality of side brick (11) are located the both sides of silo (12) on the arc, furnace gate support brick (10) have been laid to the upper end of side brick (11), the lower extreme that furnace gate supported brick (10) is equipped with stopper (16), stopper (16) are located both sides between side brick (11), top furnace door brick (8) have been laid to the upper end of furnace gate brick (10), top support brick (7) have been laid to the top of top support brick (7) to there is high-strength high alumina casting material (high alumina casting) between the top of furnace gate mounting hole 2) Two layers of pre-baked carbon blocks (4) are laid at the bottom in the furnace body (1), self-baked carbon blocks (5) are laid at the upper ends of the pre-baked carbon blocks (4), and corundum castable (3) is filled between the asbestos plate and the high-alumina bricks at the inclined plane at the bottom of the furnace body (1).

2. The 81000KVA calcium carbide furnace structure of claim 1, wherein the upper end of the furnace door supporting brick (10) is arc-shaped, the bottom of the top furnace door brick (8) is provided with an arc-shaped limiting groove (9), and the upper end of the furnace door supporting brick (10) is located in the arc-shaped limiting groove (9).

3. The 81000KVA calcium carbide furnace structure according to claim 1, characterized in that the bottom supporting brick (14), the bottom furnace door brick (13), the side brick (11), the furnace door supporting brick (10), the top furnace door brick (8) and the top supporting brick (7) are all made of composite brown corundum bricks.

4. The 81000KVA calcium carbide furnace structure as claimed in claim 1, wherein the self-baking carbon block (5) is laid with low temperature coarse seam paste.

5. The 81000KVA calcium carbide furnace structure of claim 1, wherein one side of the upper end of the furnace body (1) is provided with an inspection hole (6).

6. The 81000KVA calcium carbide furnace structure of claim 1, wherein, the bottom furnace door brick (13) on the outermost side is provided with a mounting groove (15) on the outer side.

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