CN213747885U - Carbon condensation furnace lining of large and medium submerged arc furnace - Google Patents
Carbon condensation furnace lining of large and medium submerged arc furnace Download PDFInfo
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- CN213747885U CN213747885U CN202023010588.9U CN202023010588U CN213747885U CN 213747885 U CN213747885 U CN 213747885U CN 202023010588 U CN202023010588 U CN 202023010588U CN 213747885 U CN213747885 U CN 213747885U
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Abstract
The utility model discloses a hot stove carbonaceous condensation furnace wall of big-and-middle-sized ore deposit, include the furnace lining wall on the furnace lining bottom with locating the furnace lining bottom, the furnace lining wall includes from supreme first hot pressing carbon brick layer, high alumina brick layer, clay brick layer and the high alumina pouring bed of material that sets gradually down, the inboard on first hot pressing carbon brick layer is equipped with the high alumina brick inside lining, the size of hot pressing carbon brick is long 200 with a milk 500mm, wide 150 with a milk 250mm, high 50-150mm in the first hot pressing carbon brick layer. In this application, through the size special design to first hot pressing charcoal brick layer department hot pressing charcoal brick, in order to reduce the clearance between the hot pressing charcoal brick, and cooperation rock wool buffer layer is to expend with heat and contract with cold's cushioning effect and the timely transmission of heat on first hot pressing charcoal brick layer of graphite tile outer lining, avoided being heated unevenly and then caused the problem of ring crack by expend with heat and contract with cold, and then avoided the shut down that the ring crack leads to, increase the problem of maintenance cost, the life of furnace body has been improved.
Description
Technical Field
The utility model belongs to the technical field of the hot stove in ore deposit, concretely relates to hot stove carbonaceous condensation furnace wall in big-and-middle-sized ore deposit.
Background
The submerged arc furnace is also called electric arc furnace or resistance furnace. It is mainly used for reducing and smelting ores, carbonaceous reducing agents, solvents and other raw materials. The production method is mainly used for producing ferroalloys such as ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and the like, and is the generation equipment of important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide and the like. Its working characteristics are that the carbon or magnesium refractory material is used as furnace lining, and self-culture electrode is used. The electrode is inserted into the furnace charge to carry out submerged arc operation, the energy and the current of the electric arc are utilized to pass through the furnace charge, the energy is generated due to the resistance of the furnace charge to smelt metal, the charging is carried out sequentially, the iron slag is discharged intermittently, and the continuous operation is carried out.
The furnace lining comprises a heat-preserving furnace lining and a condensing furnace lining, and the heat-preserving furnace lining is insulated by clay bricks or high-alumina bricks with poor heat conductivity to maintain the high temperature of a carbon brick smelting zone. Ferroalloy products such as ferrosilicon, metallic silicon and the like smelted by a slag-free method are mostly used for heat-insulating furnace linings. In the condensation furnace lining, the furnace wall is made of refractory materials with good heat conducting performance, and heat in the furnace is transferred to the furnace shell, so that a false furnace lining of solidified slag, namely the condensation furnace lining, is formed in the furnace wall. The thicknesses of the furnace bottom and the furnace wall of the heat-preservation furnace lining are larger than those of the condensation furnace lining, and the thicknesses of the furnace bottom and the furnace wall of the heat-preservation furnace lining using the carbon ramming mass are increased by about 500mm, so that the masonry cost is increased, the masonry time is prolonged, and the effect of prolonging the service life of the electric furnace lining smelted by the slag method by increasing the thickness of the furnace lining is very little. Especially under the situation of greatly increasing the capacity of the electric furnace, the submerged arc electric furnace with the capacity of more than 30MVA, such as high-carbon ferrochrome, high-carbon ferromanganese, silicon-manganese alloy and ferronickel smelting electric furnaces, gradually eliminates the heat-insulating furnace lining.
In the existing condensation furnace lining, the furnace lining wall is built by massive carbon bricks, gaps between the bricks are large, a binder in the gaps is easy to corrode by molten iron and the like, so that carbon particles in the carbon bricks are corroded, the compactness of the carbon brick tissue is damaged, the strength of the carbon bricks is reduced, the service life of the furnace lining is influenced, meanwhile, the massive carbon bricks and the large gaps also cause uneven heat transfer, the ring crack is easily caused by the influence of expansion with heat and contraction with cold, the production is further influenced, the maintenance cost is increased, and the service life of the submerged arc furnace is further shortened.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a hot stove carbonaceous condensation furnace wall in big-and-middle-sized ore deposit.
The utility model discloses the technical scheme who adopts does: the utility model provides a large and medium-sized hot stove in ore deposit carbonaceous condensation furnace wall, includes the furnace lining wall on the furnace lining bottom with locating, the furnace lining wall includes from supreme first hot pressing carbon brick layer, high-alumina brick layer, clay brick layer and the high-alumina bed of pouring that sets gradually down, the inboard on first hot pressing carbon brick layer is equipped with the high-alumina brick inside lining, the size of hot pressing carbon brick is long 200 and adds medicine 500mm, wide 150 and adds medicine 250mm, high 50-150mm in the first hot pressing carbon brick layer.
As an optional technical scheme, a rock wool buffer layer is arranged between the high-aluminum pouring material layer and the clay brick layer, and the thickness of the rock wool buffer layer is 8-12 mm.
As an optional technical scheme, a flange used for supporting and fixing the high-aluminum casting material layer is arranged between the high-aluminum casting material layer and the rock wool buffer layer, an anchoring piece is arranged on the flange and extends into the high-aluminum casting material layer to support and fix the high-aluminum casting material layer, and an anchoring piece is arranged on a furnace shell and is used for supporting and fixing the high-aluminum casting material layer.
As an optional technical scheme, the bottom of the furnace lining comprises a first microporous carbon brick layer and a second microporous carbon brick layer which are sequentially arranged at the bottom of the first hot-pressing carbon brick layer, a semi-graphite brick layer and a high-alumina brick substrate layer.
As an optional technical scheme, the outside on first hot pressing charcoal brick layer is equipped with the outer lining of graphite tile of high heat conductivity, the outer lining of graphite tile downwardly extending to the outside on first micropore charcoal brick layer and second micropore charcoal brick layer, half graphite brick layer and high-alumina brick substrate layer.
As an optional technical scheme, a first high-thermal-conductivity carbon expansion ramming material layer and a second hot-pressing carbon brick layer which are distributed from inside to outside are arranged between the first microporous carbon brick layer and the graphite tile outer lining.
As an optional technical scheme, a second high-heat-conductivity carbon expansion ramming material layer is arranged between the second microporous carbon brick layer, the semi-graphite brick layer and the high-aluminum brick substrate layer and the graphite tile outer lining.
As an optional technical solution, the furnace substrate further includes a carbonaceous ramming material layer and a dead iron layer on the first microporous carbon brick layer.
As an optional technical scheme, be equipped with the iron notch brick in the first hot pressing carbon brick layer, the one end of iron notch brick outwards extend the protrusion in outside the first hot pressing carbon brick layer, be equipped with a built-in high-alumina brick in the iron notch brick, be equipped with the taphole passageway that switches on in high-alumina brick inside lining, iron notch brick and the built-in high-alumina brick.
The utility model has the advantages that: in this application, through the size special design to first hot pressing charcoal brick layer department hot pressing charcoal brick, in order to reduce the clearance between the hot pressing charcoal brick, and cooperation rock wool buffer layer is to expend with heat and contract with cold's cushioning effect and the timely transmission of heat on first hot pressing charcoal brick layer of graphite tile outer lining, avoided being heated unevenly and then caused the problem of ring crack by expend with heat and contract with cold, and then avoided the shut down that the ring crack leads to, increase the problem of maintenance cost, the life of furnace body has been improved.
Drawings
FIG. 1 is a schematic structural diagram of a carbonaceous condensation furnace lining of a large and medium-sized submerged arc furnace.
Fig. 2 is an enlarged schematic view of the region a in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected 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 efforts belong to the protection scope of the present invention.
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example (b):
as shown in fig. 1 and 2, the carbonaceous condensation furnace lining of the large and medium submerged arc furnace comprises a furnace lining and a furnace lining wall arranged on the furnace lining, wherein the furnace lining wall comprises a first hot-pressed carbon brick layer 1, a high-alumina brick layer 2, a clay brick layer 3 and a high-alumina pouring material layer 4 which are sequentially arranged from bottom to top, the inner side of the first hot-pressed carbon brick layer 1 is provided with a high-alumina brick lining 5, and the sizes of the hot-pressed carbon bricks in the first hot-pressed carbon brick layer 1 are 500mm in length, 250mm in width and 150mm in width and 50-150mm in height. In a condensation furnace lining of a traditional submerged arc furnace, a large-size hot-pressed carbon brick layer is adopted at the position of a first hot-pressed carbon brick layer 1, the general specification is 1m multiplied by 400mm or 1m multiplied by 600mm, as a furnace shell and the condensation furnace lining in the furnace shell are both annular, a large gap exists between large-size square hot-pressed carbon bricks, the gap is filled by bonding materials, and due to the existence of the large gap, heat is not uniformly transferred between the hot-pressed carbon bricks, and the hot-pressed carbon bricks expand with heat and contract with cold to cause annular cracks, therefore, the annular furnace lining wall formed by specially designing the hot-pressed carbon bricks with the sizes of 200 mm, 150mm and 250mm and 50-150mm in height is smaller in gap and more uniform in heat transfer, so as to avoid the annular cracks caused by local high temperature, and meanwhile, the high-alumina brick lining 5 forms protection for the first hot-pressed carbon brick layer 1. In a preferred embodiment, the present embodiment uses a hot pressed carbon brick with the dimensions of 460mm long, 230mm wide and 114mm high.
In one aspect, in the traditional carbon brick, molten iron permeates into the carbon brick along the pores of the carbon brick, the permeated molten iron dissolves a binder in the carbon brick, so that carbon particles in the carbon brick are corroded, the compactness of the structure of the carbon brick is damaged, the strength of the carbon brick is reduced, and the molten iron permeating into the carbon brick and the carbon brick are subjected to chemical reaction to generate Fe x C, which generates volume expansion in the pores of the carbon brick after generation to embrittle and crack the pores of the carbon brick and form an embrittled layer on the hot surface of the carbon brick. In this application, through adopting the hot pressing charcoal brick of smaller size, reduce the clearance between brick and the brick to hinder the infiltration erosion of molten iron, and, the density of the hot pressing charcoal brick of this application is 1.72g/cm3And the molten iron penetration corrosion is further delayed compared with the traditional carbon brick.
On the other hand, thermodynamic calculations show that when heat caused by various reasons cannot be uniformly transferred in the carbon brick, a large temperature difference exists between the hot surface and the cold surface of the carbon brick, and the temperature difference generated inside the carbon brick has large thermal stress, so that the carbon brick is induced to crack. Pure alkali metal steam continuously flows and diffuses to a low-temperature area of the carbon brick through the microcracks of the carbon brick, if the alkali metal steam enters the microcracks of the carbon brick, the alkali metal steam is liquefied in the microcracks when the temperature meets 800-900 ℃, and then reacts with the silicoaluminophosphate ash content of the carbon brick to cause the volume expansion of the ash content to be 30% -50%, so that the microcracks of the carbon brick are aggravated to expand to form cracks. The hot pressing charcoal brick size of this application is littleer and the littleer clearance between brick and the brick, is favorable to reducing the difference in temperature of its hot side and cold side, guarantees the homogeneity and the stability of heat hot ground to reduce the production of crackle, simultaneously, the high heat conductivity of hot pressing charcoal brick also can further reduce the difference in temperature of the cold and hot face of brick, thereby solves the problem that the ring splits.
As an optional embodiment, a rock wool buffer layer 6 is arranged between the high-aluminum pouring material layer 4 and the clay brick layer 3, and the thickness of the rock wool buffer layer 6 is 8-12 mm. Design rock wool buffer layer 6 for the expend with heat and contract with cold of furnace lining wall provides the space, has further reduced because of expend with heat and contract with cold leads to the risk of ring crack.
As an optional implementation manner, a flange 7 for supporting and fixing the high-alumina casting material layer 4 is arranged between the high-alumina casting material layer 4 and the rock wool buffer layer 6, a flange upper anchoring member 8 which extends into the high-alumina casting material layer 4 to support and fix the high-alumina casting material layer 4 is arranged on the flange 7, and a furnace shell upper anchoring member 9 for supporting and fixing the high-alumina casting material layer 4 is further arranged in the high-alumina casting material layer 4. The flange 7, the flange upper anchoring piece 8 and the furnace shell upper anchoring piece 9 are arranged to play a role in fixing and supporting the high-alumina pouring material layer 4, so that the stability of the structure is improved.
As an optional implementation manner, the lining bottom includes a first microporous carbon brick layer 10 and a second microporous carbon brick layer 11, a semi-graphite brick layer 12 and a high-alumina brick lining layer 13 which are sequentially arranged at the bottom of the first hot-pressed carbon brick layer 1.
As an alternative embodiment, the outside of the first layer of hot pressed carbon bricks 1 is provided with a high thermal conductivity graphite tile outer lining 14, and the graphite tile outer lining 14 extends downwards to the outside of the first and second layers of microporous carbon bricks 10 and 11, the layer of semi-graphite bricks 12 and the layer of high alumina brick substrate 13. Graphite tile has high thermal conductivity, can in time transmit out the heat on first hot pressing charcoal brick layer 1, further reduces the risk that first hot pressing charcoal brick layer 1 local high temperature caused the ring and splits.
As an alternative embodiment, a first high thermal conductivity carbon expanded ramming mass layer 15 and a second hot pressed carbon brick layer 16 are arranged between the first microporous carbon brick layer 10 and the graphite tile outer lining 14.
As an alternative embodiment, a second high thermal conductivity carbon expansion ramming mass layer 17 is arranged between the second microporous carbon brick layer 11, the semi-graphite brick layer 12 and the high-alumina brick substrate layer 13 and the graphite tile outer lining 14.
As an alternative embodiment, the furnace lining also includes a layer of carbonaceous ramming mass 18 and a layer of dead iron 19 on the first layer of microporous carbon bricks 10.
As an optional implementation manner, an iron notch brick 20 is arranged in the first hot-pressing carbon brick layer 1, one end of the iron notch brick 20 extends outwards to protrude out of the first hot-pressing carbon brick layer 1, a built-in high-alumina brick 21 is arranged in the iron notch brick 20, and a through iron notch passage 22 is arranged in the high-alumina brick lining 5, the iron notch brick 20 and the built-in high-alumina brick 21.
In this application, through the size special design to 1 hot pressing charcoal brick in first hot pressing charcoal brick layer to cooperation rock wool buffer layer 6 is to expend with heat and contract with cold's cushioning effect and the timely transmission of the heat of first hot pressing charcoal brick layer 1 of graphite tile outer lining 14, has avoided being heated unevenly and then has caused the problem of ring crack by expend with heat and contract with cold, and then has avoided the ring crack to lead to the stop production, increase the problem of maintenance cost, has improved the life of furnace body.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (9)
1. The utility model provides a hot stove carbonaceous condensation furnace wall of big-and-middle-sized ore deposit which characterized in that: the furnace lining wall comprises a furnace substrate and a furnace lining wall arranged on the furnace lining wall, wherein the furnace lining wall comprises a first hot-pressing carbon brick layer, a high-alumina brick layer, a clay brick layer and a high-alumina pouring material layer which are sequentially arranged from bottom to top, the inner side of the first hot-pressing carbon brick layer is provided with a high-alumina brick lining, and the hot-pressing carbon bricks in the first hot-pressing carbon brick layer have the sizes of 500mm in length and 250mm in width and 150-150 mm in width.
2. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 1, characterized in that: and a rock wool buffer layer is arranged between the high-aluminum pouring material layer and the clay brick layer, and the thickness of the rock wool buffer layer is 8-12 mm.
3. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 2, characterized in that: the high-alumina casting material layer and the rock wool buffer layer are provided with flanges used for supporting and fixing the high-alumina casting material layer, the flanges are provided with anchoring pieces which extend to the high-alumina casting material layer and are used for supporting and fixing the high-alumina casting material layer, and the high-alumina casting material layer is also provided with anchoring pieces on a furnace shell used for supporting and fixing the high-alumina casting material layer.
4. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 1, characterized in that: the furnace lining bottom comprises a first microporous carbon brick layer and a second microporous carbon brick layer which are sequentially arranged at the bottom of the first hot-pressing carbon brick layer, a semi-graphite brick layer and a high-alumina brick lining layer.
5. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 4, characterized in that: the outside on first hot pressing charcoal brick layer is equipped with the outer lining of graphite tile of high heat conductivity, the outer lining of graphite tile downwardly extending to the outside on first micropore charcoal brick layer and second micropore charcoal brick layer, half graphite brick layer and high-alumina brick substrate layer.
6. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 5, characterized in that: and a first high-heat-conductivity carbon expansion ramming material layer and a second hot-pressing carbon brick layer which are distributed from inside to outside are arranged between the first microporous carbon brick layer and the graphite tile outer lining.
7. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 5, characterized in that: and a second high-heat-conduction carbon expansion ramming material layer is arranged between the second microporous carbon brick layer, the semi-graphite brick layer and the high-aluminum brick substrate layer and the graphite tile outer lining.
8. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 4, characterized in that: the furnace substrate further comprises a carbonaceous ramming material layer and a dead iron layer which are positioned on the first microporous carbon brick layer.
9. The carbonaceous condensation lining for medium and large submerged arc furnaces according to claim 1, characterized in that: the hot-pressing carbon brick comprises a first hot-pressing carbon brick layer, an iron notch brick, a first hot-pressing carbon brick layer, a second hot-pressing carbon brick layer and a second hot-pressing carbon brick layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023010588.9U CN213747885U (en) | 2020-12-15 | 2020-12-15 | Carbon condensation furnace lining of large and medium submerged arc furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023010588.9U CN213747885U (en) | 2020-12-15 | 2020-12-15 | Carbon condensation furnace lining of large and medium submerged arc furnace |
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| CN213747885U true CN213747885U (en) | 2021-07-20 |
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| CN202023010588.9U Active CN213747885U (en) | 2020-12-15 | 2020-12-15 | Carbon condensation furnace lining of large and medium submerged arc furnace |
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