CN113789419B - Siphon type sand discharging opening device and sand discharging opening method - Google Patents
Siphon type sand discharging opening device and sand discharging opening method Download PDFInfo
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- CN113789419B CN113789419B CN202111075075.2A CN202111075075A CN113789419B CN 113789419 B CN113789419 B CN 113789419B CN 202111075075 A CN202111075075 A CN 202111075075A CN 113789419 B CN113789419 B CN 113789419B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/12—Opening or sealing the tap holes
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Abstract
The invention relates to a siphon type sand discharging device and a sand discharging method, wherein the siphon type sand discharging device comprises a siphon bridge, a metal hose and an exhaust fan; the siphon bridge spans between the main ditch and the iron ditch of the sand mouth pit and consists of an arch pipe and a horizontal pipe which are connected; the outer end of the arched pipe is inserted below the molten iron liquid level of the main channel, the outer end of the horizontal pipe extends to the upper part of the iron channel, and the top of the iron channel is sealed by an iron channel cover; a vertical pipe is arranged at the top of the horizontal pipe close to one end of the iron runner, and the vertical pipe is connected with an air inlet of an exhaust fan through a metal hose; the inner walls of the arched pipes and the horizontal pipes are provided with a refractory material lining layer, and the outer wall of the arched pipe close to one end of the main ditch is provided with a refractory material outer protection layer; when the sand outlet operation is started, the outer end of the horizontal pipe is provided with a temporary sealing cover. The invention can smoothly realize the discharge of the slag iron stored in the main runner, saves the operations of reserving the sand hole on the side wall of the main runner and manually opening the sand hole, greatly reduces the labor intensity of operators in front of the furnace, improves the operating environment, and ensures the structure safety of the main runner and the operation safety of the operators.
Description
Technical Field
The invention relates to the technical field of blast furnace front operation, in particular to a siphon type sand discharging port device and a sand discharging port method.
Background
At present, the main iron runner of the blast furnace generally adopts an iron storage type main runner, a part of molten iron is reserved in the main runner in the whole service life of an iron notch, the part of molten iron can well reduce the corrosion of high-temperature and high-pressure slag iron flow to the main runner in the tapping process, and the main runner can be kept in a high-temperature state, so that the continuous operation and the tapping safety are facilitated. However, as a part of iron slag is always remained in the main runner, certain trouble is brought when a worker in front of the furnace inspects the main runner; the method is characterized in that a sand opening hole is reserved at the bottom of a sand opening side wall and is plugged by stemming, when a main ditch needs to be inspected and maintained, the sand opening hole is drilled by a special mechanical tapping machine at an iron opening operation gap, and iron slag stored in the main ditch is discharged completely, so that the main ditch is convenient to inspect and maintain.
The operation has several problems, firstly, the area of the sand outlet is generally not provided with a dust removing facility, and a sand outlet pit cover cannot be well covered when the sand outlet is operated, so that a large amount of dust is easily caused; secondly, the mechanical tapping machine needs to be hoisted to the bottom of a sand hole pit, manual hole alignment is carried out, and manual sand hole plugging is needed after sand hole placing operation, so that the whole process is high in labor intensity of workers, large in later-period maintenance workload and dangerous to some extent.
According to a liquid pressure calculation formula, the atmospheric pressure can press molten iron to 1.43m approximately under the vacuum condition, and the height is generally larger than the depth of a main ditch built in the prior art.
Disclosure of Invention
The invention provides a siphon type sand discharging device and a sand discharging method, which can smoothly discharge and clean slag iron stored in a main ditch, and save the operation of reserving a sand opening hole on the side wall of the main ditch and manually opening the sand opening hole, thereby greatly reducing the labor intensity of operators in front of a furnace, improving the operating environment and ensuring the structural safety of the main ditch and the operating safety of the operators.
In order to achieve the purpose, the invention adopts the following technical scheme:
a siphon type sand outlet device comprises a siphon bridge, a metal hose and an exhaust fan; the siphon bridge spans between the main ditch and the iron ditch of the sand mouth pit and consists of an arch pipe and a horizontal pipe which are connected; wherein the outer end of the arched pipe, namely the molten iron inlet end, is inserted below the molten iron liquid level of the main channel, the outer end of the horizontal pipe, namely the molten iron outlet end, extends to the upper part of the iron channel, and the top of the iron channel is sealed by an iron channel cover; a vertical pipe is arranged at the top of the horizontal pipe close to one end of the iron runner, and the vertical pipe is connected with an air inlet of an exhaust fan through a metal hose; the inner walls of the arch-shaped pipes and the horizontal pipes are provided with a refractory material lining layer, and the outer wall of the arch-shaped pipe close to one end of the main ditch is provided with a refractory material outer protection layer; when the sand outlet operation is started, the outer end of the horizontal pipe is provided with a temporary sealing cover.
The siphon type sand outlet device further comprises a fixing support, and the fixing support is arranged in the middle of the arched pipe.
The distance H1 from the outer end bottom edge of the arched pipe to the arched bottom of the arched pipe is larger than the height of the side wall of the main ditch and smaller than 1.43m, and the distance H2 from the bottom surface of the horizontal section to the arched bottom of the arched pipe is larger than H1.
The iron ditch cover is matched with the top opening of the iron ditch, a groove is formed in the penetrating position of the horizontal pipe of the iron ditch cover, so that the horizontal pipe is embedded in the iron ditch cover, and the vertical pipe is arranged on the horizontal pipe outside the iron ditch cover.
One end of the metal hose close to the siphon bridge is provided with a section of inverted U-shaped structure.
A sand outlet method comprises the following steps:
1) After the taphole plugging gun confirms that the taphole plugging is successful, opening a sand hole pit cover, hoisting a siphon bridge to a preset position by using a crane, so that a molten iron inlet end of the siphon bridge is immersed into molten iron in the main runner, and a molten iron outlet end extends to the position above the iron runner of the taphole pit;
2) Fixing the siphon bridge through a fixing bracket, and sealing the top opening of the iron runner by using an iron runner cover;
3) The air inlet end of the exhaust fan is connected with the vertical pipe on the horizontal pipe through a metal hose, and the metal hose is bent to form an inverted U-shaped structure, so that molten iron is prevented from entering;
4) Temporarily sealing the molten iron outflow end of the siphon bridge by using a temporary sealing cover;
5) And (3) starting the exhaust fan to exhaust air in the siphon bridge, sucking molten iron from the molten iron inlet end of the siphon bridge to the molten iron outlet end under the action of atmospheric pressure, melting the temporary sealing cover after meeting the molten iron, automatically flowing the molten iron in the main ditch into the iron ditch, simultaneously spraying water to the exposed part of the siphon bridge by using the spraying pipe for cooling until the molten iron stored in the main ditch is completely discharged, and finishing the operation of a sand discharging port.
Compared with the prior art, the invention has the beneficial effects that:
the slag iron stored in the main runner can be smoothly discharged and cleaned, the operation of reserving a sand hole on the side wall of the main runner and manually opening the sand hole is omitted, the labor intensity of operators in front of the furnace is greatly reduced, the operation environment is improved, and the structure safety and the operation safety of the operators in the main runner are guaranteed.
Drawings
FIG. 1 is a schematic view of the operating principle of a siphon-type sand-discharging device according to the present invention.
Fig. 2 is a front view of the siphon bridge of the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a right side view of fig. 2.
In the figure: 1. siphon bridge 11, arched pipe 12, horizontal pipe 13, vertical pipe 14, refractory lining layer 15, refractory outer protective layer 2, metal hose 3, exhaust fan 4, fixing support 5, main ditch 6, sand mouth pit 7, iron ditch 8, iron ditch cover 9, temporary sealing cover
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1-4, the siphon-type sand outlet device of the present invention comprises a siphon bridge 1, a metal hose 2 and an exhaust fan 3; the siphon bridge 1 spans between the main ditch 5 and the iron ditch 7 of the sand pit 6 and consists of an arch pipe 11 and a horizontal pipe 12 which are connected with each other; wherein the outer end of the arched pipe 11, namely the molten iron inlet end, is inserted below the molten iron liquid level of the main runner 5, the outer end of the horizontal pipe 12, namely the molten iron outlet end, extends to the upper part of the iron runner 7, and the top of the iron runner 7 is sealed by an iron runner cover 8; a vertical pipe 13 is arranged at the top of the horizontal pipe 12 close to one end of the iron runner 7, and the vertical pipe 13 is connected with an air inlet of the exhaust fan 3 through a metal hose 2; the inner walls of the arched tubes 11 and the horizontal tubes 12 are provided with a refractory lining layer 14, and the outer wall of the arched tube 11 close to one end of the main ditch 5 is provided with a refractory outer protection layer 15; when the sand outlet operation is started, the outer end of the horizontal pipe 12 is provided with a temporary sealing cover 9.
The siphon type sand outlet device further comprises a fixing support 4, and the fixing support 4 is arranged in the middle of the arched pipe 11.
The distance H1 from the bottom edge of the outer end of the arched pipe 11 to the arched bottom of the arched pipe 11 is greater than the height of the side wall of the main ditch 5 and less than 1.43m, and the distance H2 from the bottom surface of the horizontal section 12 to the arched bottom of the arched pipe 11 is greater than H1.
The iron ditch cover 8 is matched with the top opening of the iron ditch 7, the iron ditch cover 8 is provided with a groove at the position where the horizontal pipe 12 passes through so that the horizontal pipe 12 is embedded in the iron ditch cover 8, and the vertical pipe 13 is arranged on the horizontal pipe 12 outside the iron ditch cover 8.
One end of the metal hose 2 close to the siphon bridge 1 is provided with a section of inverted U-shaped structure.
A sand outlet method comprises the following steps:
1) After the taphole is plugged and the taphole plugging is confirmed to be successful, opening a cover of the taphole pit, hoisting the siphon bridge 1 to a preset position by using a crane, so that the molten iron inlet end of the siphon bridge 1 is immersed into the molten iron in the main ditch 5, and the molten iron outlet end extends to the position above the iron ditch 7 of the taphole pit 6;
2) The siphon bridge 1 is fixed through a fixing bracket 4, and the top opening of an iron runner 7 is sealed by an iron runner cover 8;
3) The air inlet end of the exhaust fan 3 is connected with the vertical pipe 13 on the horizontal pipe 12 by the metal hose 2, and the metal hose 2 is bent into an inverted U-shaped structure to prevent molten iron from entering;
4) Temporarily sealing the molten iron outflow end of the siphon bridge 1 by using a temporary sealing cover 9;
5) And starting the exhaust fan 3 to exhaust air in the siphon bridge 1, sucking molten iron from a molten iron inlet end of the siphon bridge 1 to a molten iron outlet end under the action of atmospheric pressure, melting the molten iron after the temporary sealing cover 9 meets the molten iron, automatically flowing the molten iron in the main channel 5 into the iron channel 7, spraying water to the exposed part of the siphon bridge 1 by using a spraying pipe to cool down until the molten iron stored in the main channel 5 is completely discharged, and finishing the operation of a sand outlet.
The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation procedures are given, but the scope of the invention is not limited to the following examples.
[ examples ] A method for producing a compound
In this embodiment, for the operation of putting the sand mouth to the inspection maintenance main ditch, the concrete process is as follows:
1. after 30min of taphole plugging, confirming successful molten iron plugging; opening a sand hole pit cover, hoisting a siphon bridge to a preset position by using a crane, so that a molten iron inlet end of the siphon bridge is immersed into molten iron in the main ditch, and the height H1 of an inner arch of the siphon bridge corresponding to the molten iron inlet end is slightly larger than the height of the side wall of the main ditch and is smaller than 1.43m; the molten iron outlet end of the siphon bridge extends into the molten iron ditch of the sand hole pit, and the inner arch height H2 of the siphon bridge at the corresponding end is greater than H1;
2. the iron ditch is covered by a special iron ditch cover, and the iron ditch cover is matched with the appearance of the molten iron outlet end on the siphon bridge, so that the sealing is ensured to be tight, and the aim of reducing dust emission is fulfilled;
3. connecting the exhaust fan with a vertical pipe on the siphon bridge by using a metal hose, forming the metal hose into an inverted U-shaped structure to prevent molten iron from being sucked in, and sealing a molten iron outlet end of the siphon bridge by using a plastic cover;
4. starting an exhaust fan to exhaust air in the siphon bridge, wherein molten iron flows from the molten iron inlet end to the molten iron outlet end of the siphon bridge under the action of atmospheric pressure until all molten iron stored in the main ditch is placed in the molten iron ditch;
5. when the sand outlet iron is put, the spray pipe is used for spraying water to the exposed part of the siphon bridge, so that the temperature of the siphon bridge is reduced, and dust is inhibited.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A siphon type sand outlet device is characterized by comprising a siphon bridge, a metal hose and an exhaust fan; the siphon bridge spans between the main ditch and the iron ditch of the sand hole pit and consists of an arch pipe and a horizontal pipe which are connected with each other; wherein the outer end of the arched pipe, namely the molten iron inlet end, is inserted below the molten iron liquid level of the main channel, the outer end of the horizontal pipe, namely the molten iron outlet end, extends to the upper part of the iron channel, and the top of the iron channel is sealed by an iron channel cover; a vertical pipe is arranged at the top of the horizontal pipe close to one end of the iron runner, and the vertical pipe is connected with an air inlet of an exhaust fan through a metal hose; the inner walls of the arch-shaped pipes and the horizontal pipes are provided with a refractory material lining layer, and the outer wall of the arch-shaped pipe close to one end of the main ditch is provided with a refractory material outer protection layer; when the sand outlet operation is started, a temporary sealing cover is arranged at the outer end of the horizontal pipe; the distance H1 from the outer end bottom edge of the arched pipe to the arched bottom of the arched pipe is larger than the height of the side wall of the main ditch and smaller than 1.43m, and the distance H2 from the bottom surface of the horizontal section to the arched bottom of the arched pipe is larger than H1.
2. The siphonic sand-discharging port device according to claim 1, further comprising a fixing bracket, wherein the fixing bracket is arranged in the middle of the arched pipe.
3. The siphonic sand discharging port device according to claim 1, wherein the iron channel cover is matched with the top opening of the iron channel, a groove is arranged at the penetrating position of the horizontal pipe of the iron channel cover to enable the horizontal pipe to be embedded in the iron channel cover, and the vertical pipe is arranged on the horizontal pipe outside the iron channel cover.
4. The siphonic sand drain device according to claim 1, wherein the metal hose has an inverted U-shaped configuration at an end adjacent to the siphon bridge.
5. The sand discharging method based on the siphon-type sand discharging device according to any one of claims 1 to 4, characterized by comprising the following steps:
1) After the taphole blasting gun is plugged and the taphole plugging is confirmed to be successful, opening a sand taphole pit cover, hoisting a siphon bridge to a preset position by using a crane, so that the molten iron inlet end of the siphon bridge is immersed into the molten iron in the main channel, and the molten iron outlet end extends to the position above the taphole of the sand taphole pit;
2) Fixing the siphon bridge through a fixing support, and sealing the top opening of the iron runner by using an iron runner cover;
3) The air inlet end of the exhaust fan is connected with the vertical pipe on the horizontal pipe through a metal hose, and the metal hose is bent to form an inverted U-shaped structure, so that molten iron is prevented from entering;
4) Temporarily sealing the molten iron outflow end of the siphon bridge by using a temporary sealing cover;
5) And starting the exhaust fan to exhaust air in the siphon bridge, sucking molten iron from a molten iron inlet end of the siphon bridge to a molten iron outlet end under the action of atmospheric pressure, melting the temporary sealing cover after meeting the molten iron, automatically flowing the molten iron in the main ditch into the iron ditch, spraying water to the exposed part of the siphon bridge by using the spraying pipe to cool until the molten iron stored in the main ditch is completely discharged, and finishing the operation of a sand discharging port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075075.2A CN113789419B (en) | 2021-09-14 | 2021-09-14 | Siphon type sand discharging opening device and sand discharging opening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075075.2A CN113789419B (en) | 2021-09-14 | 2021-09-14 | Siphon type sand discharging opening device and sand discharging opening method |
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| Publication Number | Publication Date |
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| CN113789419A CN113789419A (en) | 2021-12-14 |
| CN113789419B true CN113789419B (en) | 2023-01-17 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072725A (en) * | 1992-10-09 | 1993-06-02 | 李德基 | The tapping device of blast furnace enclosed iron-channel of belt sliding door |
| CN201367433Y (en) * | 2008-12-02 | 2009-12-23 | 北京联合荣大工程材料有限责任公司 | Single iron notch blast furnace iron storage type iron runner |
| CN101497930A (en) * | 2008-12-05 | 2009-08-05 | 北京联合荣大工程材料有限责任公司 | Single taphole blast furnace tapping channel iron storing type improving technology |
| CN202272894U (en) * | 2011-09-30 | 2012-06-13 | 鞍钢股份有限公司 | Residual iron runner for blast furnace |
| CN102839247A (en) * | 2012-09-27 | 2012-12-26 | 鞍钢股份有限公司 | Method for improving service life of iron-storage main iron runner |
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- 2021-09-14 CN CN202111075075.2A patent/CN113789419B/en active Active
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