CN110438275B - Blast furnace hearth pouring method and mold - Google Patents
Blast furnace hearth pouring method and mold Download PDFInfo
- Publication number
- CN110438275B CN110438275B CN201910663805.7A CN201910663805A CN110438275B CN 110438275 B CN110438275 B CN 110438275B CN 201910663805 A CN201910663805 A CN 201910663805A CN 110438275 B CN110438275 B CN 110438275B
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- arc
- pouring
- blast furnace
- shaped plate
- furnace hearth
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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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
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall
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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
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D2001/1605—Repairing linings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Blast Furnaces (AREA)
Abstract
The invention belongs to the technical field of hearth casting, and discloses a blast furnace hearth casting method and a casting mold; the pouring method comprises the following steps: a lower layer template is erected in the taphole area, wherein an arc-shaped plate with the radius larger than a set value is arranged on the lower layer template, and the circle center of the arc-shaped plate is superposed with the center of the taphole channel; pouring a lower-layer pouring material in an iron notch area based on the lower-layer template; removing the arc-shaped plate, and erecting an upper-layer template in the taphole area; and pouring an upper layer pouring material based on the upper layer template. The blast furnace hearth pouring method and the pouring mold provided by the invention are based on seal pouring, and the gap between the upper layer and the lower layer is kept above a safety set value through the partition optimization of the pouring area of the pouring mold, so that the risk of air leakage is reduced on the premise of higher efficiency.
Description
Technical Field
The invention relates to the technical field of hearth casting, in particular to a blast furnace hearth casting method and a blast furnace hearth casting mold.
Background
The integral casting of the hearth is a new technology based on the traditional bricklaying repair, and the hearth of the blast furnace is repaired by adopting an indefinite self-flowing material and a formwork casting mode. The casting hearth specifically comprises: and (5) layered formwork support, pouring and health maintenance. However, due to the limitation of material performance, the maximum height of each layer of casting material is 1.5 meters, and in the field formwork erecting operation, a gap between two layers of formworks is quite possibly in the range of 200mm of a taphole channel, so that the connecting gap between the upper layer of casting material and the lower layer of casting material is too close to the taphole channel, and the phenomenon of taphole cross-ventilation is easy to occur.
Disclosure of Invention
The invention provides a blast furnace hearth pouring method and a mold, which solve the technical problem that in the prior art, a gap between layers of pouring materials of a layered formwork-erecting pouring process is too close to an iron notch channel, and air leakage of an iron notch is easy to occur.
In order to solve the technical problem, the invention provides a blast furnace hearth pouring method, which comprises the following steps:
a lower layer template is erected in the taphole area, wherein an arc-shaped plate with the radius larger than a set value is arranged on the lower layer template, and the circle center of the arc-shaped plate is superposed with the center of the taphole channel;
pouring a lower-layer pouring material in an iron notch area based on the lower-layer template;
removing the arc-shaped plate, and erecting an upper-layer template in the taphole area;
and pouring an upper layer pouring material based on the upper layer template.
Further, the set value is greater than or equal to 500 mm.
Furthermore, the arc-shaped plate is of an overall arc-shaped polygonal structure formed by splicing a plurality of plates.
Further, the arc-shaped plate is of a semi-arc structure.
Further, lubricating oil is coated on the arc-shaped plates.
A mould for casting a blast furnace hearth is used for the casting method of the blast furnace hearth; the method comprises the following steps: pouring the mould body;
the casting mould body is provided with an arc-shaped plate;
wherein, the centre of a circle of arc and the center coincidence of indisputable mouthful passageway.
Furthermore, the arc-shaped plate is of an overall arc-shaped polygonal structure formed by splicing a plurality of plates.
Further, the arc-shaped plate is of a semi-arc structure.
Furthermore, two ends of the arc-shaped plate are detachably fixed on the casting die body.
Furthermore, a slot is formed in the casting die body, and the edge of the arc-shaped plate is embedded in the slot.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the blast furnace hearth pouring method provided in the embodiment of the application adopts a layered pouring method for erecting the mold, when the mold is erected on the lower layer, an arc plate surrounding the taphole channel is arranged, and the circle center of the arc plate is adjusted to the position coinciding with the taphole channel, so that an arc gap is formed between the upper layer and the lower layer during pouring, the gap between the layers is ensured to be always positioned on a set value, and the risk of air leakage is greatly reduced. Simultaneously can be according to actual needs, set up the radius of arc to the distance of gap to the gap between layer between adjustment layer gap to indisputable mouthful passageway, the flexibility is higher, and adaptability is good. On the other hand, the unification of process number and anti-gas leakage effect can also be realized, and lower gas leakage risk can also be guaranteed while high-efficient operation is realized.
Drawings
FIG. 1 is a schematic view of a pouring area of a blast furnace hearth pouring method according to an embodiment of the present invention.
Detailed Description
The embodiment of the application provides a blast furnace hearth pouring method and a mold, and solves the technical problem that in the prior art, gaps between layers of pouring materials of a layered formwork-erecting pouring process are too close to a taphole channel, and taphole cross gas is easy to occur.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, a blast furnace hearth casting method includes:
a lower layer template is erected in the taphole area, wherein an arc-shaped plate 3 with the radius larger than a set value is arranged on the lower layer template 4, and the circle center of the arc-shaped plate 3 is superposed with the center of the taphole channel 1; therefore, an arc-shaped isolation area is formed below the taphole channel 1, so that an interlayer gap is also arc-shaped, the distance from the interlayer gap to the taphole channel 1 is controlled to be more than the radius, the interlayer gap can be ensured to be always more than a low-risk set value, and the risk of air leakage is greatly reduced; more importantly, the pouring process is not increased, so that the operation efficiency is ensured.
Pouring a lower-layer castable 6 in the taphole area based on the lower-layer template 3; and realizing the lower layer pouring.
The arc-shaped plate 3 is dismantled, and an upper layer template 2 is erected in the taphole area; pouring an upper layer castable 5 based on the upper layer template 2; the upper layer pouring is realized, and the gap between the layers is a circle around the taphole channel 1 and is always above the safety set value.
In this embodiment, based on the specification of a common blast furnace, the set value is greater than or equal to 500 mm; of course, the set value can take other values according to the actual material selection or production condition.
Further, the arc-shaped plate 3 is a polygonal structure which is formed by splicing a plurality of plates and is integrally arc-shaped; that is, the distance between the iron notch channel 1 and the iron notch channel is controlled to be above the set value.
Generally, the arc plate 3 is a regular semi-arc structure.
In order to facilitate demoulding, the arc-shaped plates 3 are coated with lubricating oil.
The embodiment also provides a mold for casting the blast furnace hearth based on the method, which is used for the casting method of the blast furnace hearth; the method comprises the following steps: pouring the mould body;
the casting mould body is provided with an arc-shaped plate;
wherein, the centre of a circle of arc and the center coincidence of indisputable mouthful passageway.
Optionally, the arc-shaped plate is of an overall arc-shaped polygonal structure formed by splicing a plurality of plates, or the arc-shaped plate is of a semi-arc-shaped structure.
In order to facilitate the disassembly, the two ends of the arc-shaped plate 3 are detachably fixed on the casting mould body.
Generally speaking, the casting mold body is provided with a slot, and the edge of the arc-shaped plate 3 is embedded in the slot, so that the assembly and disassembly are convenient.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the blast furnace hearth pouring method provided in the embodiment of the application adopts a layered pouring method for erecting the mold, when the mold is erected on the lower layer, an arc plate surrounding the taphole channel is arranged, and the circle center of the arc plate is adjusted to the position coinciding with the taphole channel, so that an arc gap is formed between the upper layer and the lower layer during pouring, the gap between the layers is ensured to be always positioned on a set value, and the risk of air leakage is greatly reduced. Simultaneously can be according to actual needs, set up the radius of arc to the distance of gap to the gap between layer between adjustment layer gap to indisputable mouthful passageway, the flexibility is higher, and adaptability is good. On the other hand, the unification of process number and anti-gas leakage effect can also be realized, and lower gas leakage risk can also be guaranteed while high-efficient operation is realized.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A blast furnace hearth pouring method is characterized by comprising the following steps:
a lower layer template is erected in the taphole area, wherein an arc-shaped plate with the radius larger than a set value is arranged on the lower layer template, and the circle center of the arc-shaped plate is superposed with the center of the taphole channel;
pouring a lower-layer pouring material in an iron notch area based on the lower-layer template;
removing the arc-shaped plate, and erecting an upper-layer template in the taphole area;
and pouring an upper layer pouring material based on the upper layer template.
2. The blast furnace hearth casting method according to claim 1, wherein the set value is 500mm or more.
3. The method of claim 1, wherein the arc-shaped plate is a polygonal structure with an arc shape as a whole and formed by splicing a plurality of plates.
4. The blast furnace hearth casting method according to claim 1, wherein said arc-shaped plate has a semi-arc-shaped configuration.
5. The method of casting a blast furnace hearth according to any one of claims 1 to 4, wherein the arc-shaped plate is coated with a lubricating oil.
6. A mold for casting a blast furnace hearth, which is used in the method for casting a blast furnace hearth according to claim 1; it is characterized by comprising: pouring the mould body;
the casting mould body is provided with an arc-shaped plate;
wherein, the centre of a circle of arc and the center coincidence of indisputable mouthful passageway.
7. The casting mold for the blast furnace hearth according to claim 6, wherein the arc-shaped plate is a polygonal structure which is formed by splicing a plurality of plates and is integrally arc-shaped.
8. The casting mold for a blast furnace hearth according to claim 6, wherein said arc-shaped plate has a semi-arc-shaped configuration.
9. The casting mold for the blast furnace hearth according to any one of claims 6 to 8, wherein both ends of the arc-shaped plate are detachably fixed to the casting mold body.
10. The casting mold for the blast furnace hearth according to claim 9, wherein the casting mold body is provided with a slot, and edges of the arc-shaped plates are embedded in the slot.
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| CN201910663805.7A CN110438275B (en) | 2019-07-23 | 2019-07-23 | Blast furnace hearth pouring method and mold |
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| CN201910663805.7A CN110438275B (en) | 2019-07-23 | 2019-07-23 | Blast furnace hearth pouring method and mold |
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| CN110438275A CN110438275A (en) | 2019-11-12 |
| CN110438275B true CN110438275B (en) | 2021-05-14 |
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Citations (6)
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| EP0926248A1 (en) * | 1997-12-23 | 1999-06-30 | Hoogovens Technical Services Europe BV | Runner for guiding a flow of liquid metal |
| JP2005336588A (en) * | 2004-05-31 | 2005-12-08 | Jfe Steel Kk | Hot iron runner and forming method therefor |
| CN101921887A (en) * | 2010-08-18 | 2010-12-22 | 攀钢集团冶金工程技术有限公司 | Maintenance method of blast furnace liner |
| CN105838833A (en) * | 2016-05-25 | 2016-08-10 | 河南华西耐火材料有限公司 | Blast furnace bottom and hearth integral seamless casting refractory overhaul and maintenance method |
| CN207581842U (en) * | 2017-12-04 | 2018-07-06 | 中冶赛迪工程技术股份有限公司 | A kind of bottom hearth of blast furnace structure |
| CN108893570A (en) * | 2018-09-12 | 2018-11-27 | 北京联合荣大工程材料股份有限公司 | Integrated poured blast furnace crucibe and its casting construction method |
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2019
- 2019-07-23 CN CN201910663805.7A patent/CN110438275B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0926248A1 (en) * | 1997-12-23 | 1999-06-30 | Hoogovens Technical Services Europe BV | Runner for guiding a flow of liquid metal |
| JP2005336588A (en) * | 2004-05-31 | 2005-12-08 | Jfe Steel Kk | Hot iron runner and forming method therefor |
| CN101921887A (en) * | 2010-08-18 | 2010-12-22 | 攀钢集团冶金工程技术有限公司 | Maintenance method of blast furnace liner |
| CN105838833A (en) * | 2016-05-25 | 2016-08-10 | 河南华西耐火材料有限公司 | Blast furnace bottom and hearth integral seamless casting refractory overhaul and maintenance method |
| CN207581842U (en) * | 2017-12-04 | 2018-07-06 | 中冶赛迪工程技术股份有限公司 | A kind of bottom hearth of blast furnace structure |
| CN108893570A (en) * | 2018-09-12 | 2018-11-27 | 北京联合荣大工程材料股份有限公司 | Integrated poured blast furnace crucibe and its casting construction method |
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Effective date of registration: 20210513 Address after: 025 Zhao'an street, Qian'an Economic Development Zone, Tangshan City, Hebei Province 064400 Patentee after: QIAN'AN IRON AND STEEL COMPANY OF SHOUGANG Corp. Address before: 100040 Shijingshan Road, Shijingshan District, Beijing Patentee before: BEIJING SHOUGANG Co.,Ltd. |