CN114061308B - Electric furnace for smelting carbonized slag - Google Patents
Electric furnace for smelting carbonized slag Download PDFInfo
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- CN114061308B CN114061308B CN202111347196.8A CN202111347196A CN114061308B CN 114061308 B CN114061308 B CN 114061308B CN 202111347196 A CN202111347196 A CN 202111347196A CN 114061308 B CN114061308 B CN 114061308B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0043—Floors, hearths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1545—Equipment for removing or retaining slag
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B2014/0843—Lining or casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Metallurgy (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a carbide slag smelting electric furnace, which comprises a round furnace bottom and a furnace wall extending upwards along the edge of the furnace bottom, wherein the upper surface of the furnace bottom is gradually lowered from the center to the edge. The furnace bottom furnace type of the invention is designed into an upward convex spherical structure, which can obviously prolong the service life of the furnace bottom of the carbide slag smelting electric furnace and increase the service life from about 1000 heats to about 2000 heats. And the slag discharging time of the carbide slag can be greatly shortened, and the slag discharging time is reduced from more than 1h to less than 0.5 h.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to a carbide slag smelting electric furnace.
Background
The high-temperature carbonization demonstration line of the climbing steel titanium-containing blast furnace slag is obtained by taking liquid climbing steel titanium-containing blast furnace slag and coke powder as raw materials, taking a three-phase alternating current electric furnace as a reaction vessel and carrying out reduction carbonization reaction. When the smelting end point is reached, the finished liquid carbonized slag can flow out from the slag outlet to enter the subsequent process.
The current demonstration line has undergone 6 generations of furnaces, the service life of each generation of furnace is gradually improved, and the highest service life reaches 1200 heats. The end of each generation of furnace is accompanied by heavy furnace demolishing work, the prior furnace bricks are ordinary C14 magnesia carbon bricks, the furnace bricks are seriously eroded (about 1000 heats later, bricks with the length of 345mm are eroded to about 50 mm) when the furnace is demolished each time, and the service life of the final furnace bricks is 1 generation of furnace (about 1000 heats). And because of the carbonized slag with extremely high residual hardness of the furnace bottom, the removal of the bottom brick part is more difficult, and a great amount of manpower and material resources are consumed. In addition, the current furnace bottom is designed as a flat furnace bottom, so that the static pressure of the carbide slag is small when the carbide slag flows out, the flow speed is slow, and the outflow of the carbide slag is not facilitated. Finally, the slag tapping time is too long, and the current slag tapping time is generally more than 1h, which seriously affects the production efficiency.
Based on this, the prior art still remains to be improved.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the invention provides a carbonized slag smelting electric furnace, which starts from the components of a bottom brick and a furnace bottom furnace, improves the performance of the bottom brick, prolongs the service life of the bottom brick, increases the static pressure of the carbonized slag when flowing out, and creates better conditions for the flowing out of the carbonized slag.
The embodiment of the invention discloses a carbide slag smelting electric furnace, which comprises a round furnace bottom and a furnace wall extending upwards along the edge of the furnace bottom, wherein the upper surface of the furnace bottom is gradually lowered from the center to the edge.
Further, the upper surface of the furnace bottom is in smooth transition.
Further, the upper surface of the furnace bottom is provided with an upward convex spherical structure.
Further, the vertical height of the furnace bottom is the height difference between the highest point and the lowest point of the upper convex spherical structure, the radius of the furnace bottom is the radius of a circle formed by the lowest point of the upper convex spherical structure,
and the ratio of the vertical height to the bottom radius is 0.060-0.070.
Further, the furnace bottom is made of modified magnesia carbon bricks.
Further, the modified magnesia carbon brick comprises the following components in percentage by mass:
MgO 78％～82％
C 16％～20％
Al 0～4％。
further, a slag outlet is arranged on the furnace wall.
Further, the height of the center line of the slag hole is lower than the horizontal height of the center of the furnace bottom.
Further, the slag hole is arranged near the edge of the furnace bottom.
Further, the furnace wall is a C14 magnesia carbon brick.
By adopting the technical scheme, the invention has at least the following beneficial effects:
compared with the existing flat furnace bottom, the furnace bottom has the advantages that the depth of carbonized slag liquid is obviously improved, the static pressure of the carbonized slag flowing out is also increased, the flow speed is accelerated, the slag discharging time can be greatly shortened, the slag discharging time can be expected to be reduced from more than 1h to less than 0.5h, and the production efficiency is greatly improved.
The bottom brick of the electric furnace for smelting carbonized slag is made of modified magnesia carbon bricks, compared with the prior common C14 magnesia carbon bricks, the improvement of the C content improves the heat conductivity and oxidation resistance of the bottom brick, and the addition of Al powder also improves the oxidation resistance of the bottom brick. The improvements in thermal conductivity and oxidation resistance have greatly increased the life of the brick, which has been currently increased from around 1000 heats to around 2000 heats. And the frequency of dismantling and re-laying the bottom bricks is reduced, and the consumption of manpower and material resources is also greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a carbonized residue smelting electric furnace according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
As shown in fig. 1, some embodiments of the present invention disclose a carbonized residue smelting electric furnace, which, starting from the composition of the bottom bricks and the furnace type of the furnace bottom, improves the performance of the bottom bricks, prolongs the life of the bottom bricks, and increases the static pressure of the carbonized residue when flowing out, thereby creating better conditions for the flowing out of the carbonized residue. Specifically, it comprises a circular furnace bottom 1, and a furnace wall 2 extending upwards along the edges of said furnace bottom, wherein the upper surface 4 of said furnace bottom 1 is arranged to decrease gradually from the centre towards the edges. Preferably, the upper surface 4 of the furnace floor 1 is provided with an upwardly convex spherical configuration. The vertical height of the furnace bottom is the height difference between the highest point and the lowest point of the upward convex spherical structure, the furnace bottom radius of the furnace bottom is the radius of a circle formed by the lowest point of the upward convex spherical structure, and the ratio of the vertical height to the furnace bottom radius is preferably 0.060-0.070. Namely, the ratio of the vertical height h of the highest point of the convex spherical surface on the furnace bottom to the plane to the radius r of the furnace bottom is 0.060-0.070. The furnace wall is provided with a slag outlet 3. The height of the centre line of the tap hole 3 is lower than the level of the centre of the sole. The slag outlet 3 is arranged near the edge of the furnace bottom. The furnace wall may be implemented as a C14 magnesia carbon brick.
On the other hand, some embodiments of the invention disclose a carbide slag smelting electric furnace, and on the basis of the above embodiments, the material of the furnace bottom is modified magnesia carbon bricks. The modified magnesia carbon brick comprises the following components in percentage by mass:
MgO 78％～82％
C 16％～20％
Al 0～4％。
the material of the bottom brick of the electric furnace for smelting the carbonized slag is changed into a modified magnesia carbon brick, compared with the prior common C14 magnesia carbon brick, the improvement of the C content improves the heat conductivity and the oxidation resistance of the bottom brick, and the addition of Al powder also improves the oxidation resistance. The improvements in thermal conductivity and oxidation resistance have greatly increased the life of the brick, which has been currently increased from around 1000 heats to around 2000 heats. And the frequency of dismantling and re-laying the bottom bricks is reduced, and the consumption of manpower and material resources is also greatly reduced.
Example 1
A batch of bottom bricks are manufactured according to the components (80 percent of MgO, 18 percent of C and 2 percent of Al) of the modified magnesia carbon bricks and are applied to the bottom rebuilt of the 3 rd generation furnace of the high-temperature carbonization demonstration line carbonization slag smelting electric furnace of the climbing steel titanium-containing blast furnace slag. When a part of the bottom bricks were removed by the end of the 3-generation furnace, the brick-like erosion was found to be good (about 1000 heats, bricks 345mm long were eroded to about 200 mm). So the 4-generation furnace is not dismantled to re-lay the bottom bricks, and the brick-like erosion condition is still good (the bricks are eroded to about 100 mm) when part of the bottom bricks are dismantled at the end of the 4-generation furnace. But considering the risk problem, the 5-generation furnace is finally dismantled to re-lay the bottom bricks.
Finally, the furnace bottom adopting the modified magnesia carbon brick (the components are 80 percent MgO, 18 percent C and 2 percent Al) is subjected to two generations of furnace service of 3 and 4, and the service life reaches 1846 times.
In a laboratory, organic glass is used as a material to manufacture a reduced model of the carbide slag smelting electric furnace, but the furnace bottom of the model is designed to be an upward convex spherical surface, and the ratio of the vertical height h of the highest point of the upward convex spherical surface to the plane to the radius r of the furnace bottom is 0.060. The phenolic resin with the viscosity similar to that of the liquid finished carbonized slag is used for simulating the carbonized slag, and a simulated test of the outflow of the carbonized slag is carried out.
Finally, the slag tapping time of the carbonized slag simulation test with the raw material and the volume reduced in an equal proportion is 35min.
Example 2
A batch of bottom bricks are manufactured according to the components (79 percent MgO, 19 percent C and 2 percent Al) of the modified magnesia carbon bricks and are applied to the bottom rebuilt of the 5 th generation furnace of the high-temperature carbonization demonstration line carbonization slag smelting electric furnace of the climbing steel titanium-containing blast furnace slag. When a part of the bottom bricks were removed by the end of the 5-generation furnace, the brick-like erosion was found to be good (about 1000 heats later, bricks 345mm long were eroded to about 210 mm). So the 5-generation furnace is not dismantled to re-lay the bottom bricks, and the brick-like erosion condition is still good (the bricks are eroded to about 120 mm) when part of the bottom bricks are dismantled at the end of the 6-generation furnace. But in view of the risk problem, 7-generation furnace is finally dismantled to re-lay the bottom bricks.
Finally, the furnace bottom adopting the modified magnesia carbon bricks (the components are 79 percent MgO, 19 percent C and 2 percent Al) is subjected to 5 and 6 generations of furnace service, and the service life reaches 2194 heats.
In a laboratory, organic glass is used as a material to manufacture a reduced model of the carbide slag smelting electric furnace, but the furnace bottom of the model is designed to be an upward convex spherical surface, and the ratio of the vertical height h of the highest point of the upward convex spherical surface to the plane to the radius r of the furnace bottom is 0.070. The phenolic resin with the viscosity similar to that of the liquid finished carbonized slag is used for simulating the carbonized slag, and a simulated test of the outflow of the carbonized slag is carried out.
Finally, the slag tapping time of the carbonized slag simulation test with the raw material and the volume reduced in an equal proportion is 30min.
In summary, according to the electric furnace for smelting carbonized residues disclosed by the embodiment of the invention, the bottom brick of the electric furnace for smelting carbonized residues is made of modified magnesia carbon bricks; the furnace bottom type is an upward convex spherical surface, so that the service life of the furnace bottom of the carbide slag smelting electric furnace can be obviously prolonged, and the furnace bottom is increased from about 1000 heats to about 2000 heats. And the slag discharging time of the carbide slag can be greatly shortened, and the slag discharging time is reduced from more than 1h to less than 0.5 h.
It should be noted that, each component or step in each embodiment may be intersected, replaced, added, and deleted, and therefore, the combination formed by these reasonable permutation and combination transformations shall also belong to the protection scope of the present invention, and shall not limit the protection scope of the present invention to the embodiments.
The foregoing is an exemplary embodiment of the present disclosure, and the order in which the embodiments of the present disclosure are disclosed is merely for the purpose of description and does not represent the advantages or disadvantages of the embodiments. It should be noted that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest that the scope of the disclosure of embodiments of the invention (including the claims) is limited to these examples and that various changes and modifications may be made without departing from the scope of the invention as defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Those of ordinary skill in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of embodiments of the invention, including the claims, is limited to such examples; combinations of features of the above embodiments or in different embodiments are also possible within the idea of an embodiment of the invention, and there are many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are made within the spirit and principles of the embodiments of the invention, are included within the scope of the embodiments of the invention.
Claims (6)
1. A carbonized residue smelting electric furnace, characterized by comprising a circular furnace bottom and a furnace wall extending upward along the edge of the furnace bottom, wherein the upper surface of the furnace bottom is arranged to gradually decrease from the center to the edge;
the upper surface of the furnace bottom is provided with an upward convex spherical structure, the longitudinal height of the furnace bottom is the height difference between the highest point and the lowest point of the upward convex spherical structure, the furnace bottom radius of the furnace bottom is the radius of a circle formed by the lowest point of the upward convex spherical structure, and the ratio of the longitudinal height to the furnace bottom radius is 0.060-0.070;
the furnace bottom is made of modified magnesia carbon bricks, and the modified magnesia carbon bricks comprise the following components in percentage by mass:
MgO 78％～82％
C 16％～20％
Al 2％。
2. the electric furnace for smelting carbonized residues according to claim 1, wherein the upper surface of the furnace bottom is a smooth transition.
3. The electric furnace for smelting carbonized slag according to claim 1, wherein a slag outlet is provided on the furnace wall.
4. A carbonized residue smelting electric furnace as in claim 3, characterized in that the height of the centre line of the slag hole is lower than the level of the centre of the furnace bottom.
5. A carbonized residue smelting electric furnace according to claim 3, wherein the slag outlet is provided near the bottom edge of the furnace.
6. The electric furnace for smelting carbonized residues according to claim 1, wherein the furnace wall is a C14 magnesia carbon brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347196.8A CN114061308B (en) | 2021-11-15 | 2021-11-15 | Electric furnace for smelting carbonized slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111347196.8A CN114061308B (en) | 2021-11-15 | 2021-11-15 | Electric furnace for smelting carbonized slag |
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| CN114061308A CN114061308A (en) | 2022-02-18 |
| CN114061308B true CN114061308B (en) | 2023-10-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001056182A (en) * | 1999-08-12 | 2001-02-27 | Tokyo Kozai Kk | Vertical shaft cupola/ blast furnace/melting furnace method |
| CN201172675Y (en) * | 2007-12-26 | 2008-12-31 | 宝山钢铁股份有限公司 | Furnace bottom of silicon steel heating furnace |
| CN204007135U (en) * | 2014-08-20 | 2014-12-10 | 上海宝钢节能环保技术有限公司 | A kind of bottom construction of heating furnace |
| CN105198452A (en) * | 2015-08-03 | 2015-12-30 | 丹东播磨耐火材料有限公司 | Magnesia carbon brick for furnace wall hot spot area of steelmaking electric-arc furnace |
| CN108225026A (en) * | 2018-02-09 | 2018-06-29 | 攀钢集团攀枝花钢钒有限公司 | It carbonization electric furnace body structure and its builds by laying bricks or stones and maintaining method |
-
2021
- 2021-11-15 CN CN202111347196.8A patent/CN114061308B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001056182A (en) * | 1999-08-12 | 2001-02-27 | Tokyo Kozai Kk | Vertical shaft cupola/ blast furnace/melting furnace method |
| CN201172675Y (en) * | 2007-12-26 | 2008-12-31 | 宝山钢铁股份有限公司 | Furnace bottom of silicon steel heating furnace |
| CN204007135U (en) * | 2014-08-20 | 2014-12-10 | 上海宝钢节能环保技术有限公司 | A kind of bottom construction of heating furnace |
| CN105198452A (en) * | 2015-08-03 | 2015-12-30 | 丹东播磨耐火材料有限公司 | Magnesia carbon brick for furnace wall hot spot area of steelmaking electric-arc furnace |
| CN108225026A (en) * | 2018-02-09 | 2018-06-29 | 攀钢集团攀枝花钢钒有限公司 | It carbonization electric furnace body structure and its builds by laying bricks or stones and maintaining method |
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| CN114061308A (en) | 2022-02-18 |
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