CN115595398A - Anti-blocking long-life type converter bottom blowing device and application thereof - Google Patents
Anti-blocking long-life type converter bottom blowing device and application thereof Download PDFInfo
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- CN115595398A CN115595398A CN202110718493.2A CN202110718493A CN115595398A CN 115595398 A CN115595398 A CN 115595398A CN 202110718493 A CN202110718493 A CN 202110718493A CN 115595398 A CN115595398 A CN 115595398A
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- 238000007664 blowing Methods 0.000 title claims abstract description 80
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 239000011449 brick Substances 0.000 claims description 27
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 44
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009851 ferrous metallurgy Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- -1 carbon oxygen ions Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses an anti-blocking long-life converter bottom blowing device and application thereof, wherein the anti-blocking long-life converter bottom blowing device comprises an air inlet chamber, an air distribution chamber and an air blowing valve pipe; one end of the air inlet chamber is provided with an air inlet, the other end of the air inlet chamber is communicated with the air distribution chamber through a filter, and the air distribution chamber is communicated with the air blowing valve pipe; the air blowing valve pipe is of a Tesla valve structure. The invention overcomes the easy blockage phenomenon of the insole air supply device in the prior art and solves the problem of large resistance loss of the insole air supply device.
Description
Technical Field
The invention relates to the field of ferrous metallurgy, in particular to an anti-blocking long-life converter bottom blowing device and application thereof.
Background
The top-bottom combined blowing process is also called a combined blowing process, and refers to a ferrous metallurgy process in which oxygen, i.e., top-blown oxygen, is supplied from above a converter molten bath, inert gas or nitrogen is supplied from the bottom of the converter, and blowing is performed at the top and bottom simultaneously. At present, most of large and medium-sized converters adopt a composite blowing process. The converter bottom blowing adopts a straight cylinder type nozzle gas supply element at first, the manufacture is simple, but the process requirements can not be met frequently under the gas flow regulation range, and molten steel is easy to adhere to a nozzle and pour steel, and the nozzle is easy to corrode and damage. Therefore, a double-layer sleeve nozzle appears, but the adjustable gas quantity range of the gas supply element is still small, so that the dephosphorization of medium and high carbon steel is difficult during smelting. In turn, a circular seam type nozzle capable of adjusting air flow in a larger range is developed, and the nozzle is widely applied at present, but the nozzle has the main problems that the seam is narrow, and the concentricity is difficult to guarantee. Meanwhile, capillary type gas supply elements have appeared in western europe, which are applied to production because of their large range of adjustable gas amount, capability of allowing gas flow to be interrupted, and great adaptability to blowing operation. However, the pore diameter of the capillary tube is small, once the capillary tube is blocked, the ventilation elements can not be communicated again, the bottom blowing function of each ventilation element is gradually lost, and the service life of a bottom blowing gas supply system and the service life of a furnace lining can not be ensured. Later, a thin metal hole multi-hole plug type gas supply element appears, the diameter of a thin tube is small (the inner diameter is generally 2 mm), the loss of gas circulation resistance is high, and the phenomenon of steel pouring is easily caused when the gas supply element is used under the condition of low gas source pressure; because the resistance loss of the thin tube is high, the requirement on higher use pressure is high, and the adjustment range of the air supply intensity is smaller under the condition of lower air source pressure.
The characteristics of various forms of bottom blowing gas supply elements at home and abroad are compared as shown in the following table 1:
in addition, the metallurgical effect of converter smelting is greatly influenced by the number and the arrangement positions of the bottom gas supply elements at the converter bottoms with different nominal capacities. For example, the converter and the smelting method thereof disclosed in the Chinese patent 201911300604.7 adopt 12 bottom blowing elements which are symmetrically and uniformly distributed along the circumference of the furnace bottom. Long-term working practices and repeated exploration show that the layout scheme of the air brick is a non-optimal mode, a bottom blowing element is properly reduced, the flow of single bottom blowing is increased, the utilization rate of energy can be improved, the asymmetric multi-ring arrangement of the element can obviously shorten the uniform mixing time of molten steel in a molten pool, the mass fraction of end point oxygen and the mass fraction of carbon oxygen ions are reduced, the mass fraction of end point molten steel Mn is improved, and the mass fraction of TFe in slag is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an anti-blocking long-life converter bottom blowing device and application thereof, which overcome the problem that a bottom air supply device in the prior art is easy to block and solve the problem of large resistance loss of the bottom air supply device.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the anti-blocking long-life converter bottom blowing device comprises an air inlet chamber, an air distribution chamber and a blowing valve pipe;
one end of the air inlet chamber is provided with an air inlet, the other end of the air inlet chamber is communicated with the air distribution chamber through a filter, and the air distribution chamber is communicated with the air blowing valve pipe;
the air blowing valve pipe is of a Tesla valve structure.
Preferably, the lower end of the air blowing valve pipe is an inlet which is communicated with the air distribution chamber through a mounting flange, the upper end of the air blowing valve pipe is an outlet, and a main flow passage is arranged between the upper end and the lower end;
the main runner is communicated with a plurality of sub-runners, and an independent closed loop is formed between each sub-runner and the main runner.
Preferably, the sub-runners are distributed along the main runner in turn from bottom to top left to right in sequence.
Preferably, the sub-runners comprise straight segments and circular segments;
one end of the straight line section is communicated with the main flow passage, and the other end of the straight line section is communicated with one end of the circular arc section;
the other end of the circular arc section is communicated with the main runner.
Preferably, an included angle θ between the circular arc section and the main flow passage is an obtuse angle.
Preferably, at least 4 branch channels are arranged on the main channel.
Preferably, the diameter of the air blowing valve pipe is 1 mm-20 mm.
On the other hand, the application of the anti-blocking long-life converter bottom blowing device is as follows:
a plurality of the anti-blocking long-life converter bottom blowing devices are arranged on two concentric circumferences with different diameters at the bottom of the converter and are arranged along the inner circle circumference and the outer circle circumference in the clockwise direction according to the direction of an air outlet.
Preferably, air bricks are arranged at the positions where the anti-blocking long-life type converter bottom blowing device is arranged at the bottom of the converter;
the inner diameter of the converter is D, and two air bricks are symmetrically arranged on the left side and the right side of the position where the inner ring circumference with the diameter of 0.35D is intersected with the central connecting line of the trunnion;
four air bricks are arranged on the circumference of the outer ring with the diameter of 0.5D in a bilateral symmetry mode, and the two air bricks on the same side are arranged on a diameter line which forms an angle of +/-alpha with the center connecting line of the trunnion.
Preferably, the air brick is a porous magnesia carbon brick;
the alpha angle is 18 DEG to 28 deg.
The anti-blocking long-life converter bottom blowing device and the application thereof provided by the invention do not need to carry out internal mechanical motion, only utilize a space structure to push gas to flow, accelerate the gas through a physical structure, and reduce the energy loss of the gas in transportation. The gas resistance of the gas supply device is small in use, so that the gas supply device can work under lower pressure (less than 0.4 MPa), and the gun is not easy to block. In the pressure range provided by the gas source, the stirring device can work under lower back pressure, so that the maximum and minimum stirring intensity required by the process can be met, and the adjustable range of the gas amount is large.
The invention is applied to a medium-sized and large-sized combined blown converter, and has the beneficial effects that the invention is installed and applied along trunnions in a double-ring layout at the bottom of the converter, and the beneficial effects are as follows: the three-dimensional integral large-circulation stirring can be formed, the uniform mixing time of the molten steel can be effectively shortened, the melting of furnace slag is accelerated, and the oxygen content in the molten steel and the TFe content in the molten slag are obviously reduced; meanwhile, the floating of impurities and harmful gases in the steel is promoted, the purity of the molten steel is improved, and the iron loss is reduced. Multiple indexes show that the technical method has better economic and technical indexes than the prior art.
Drawings
FIG. 1 is a schematic structural diagram of a bottom blowing apparatus of a converter of the invention;
FIG. 2 is a schematic structural diagram of an air blow valve pipe in the anti-clogging long-life converter bottom blowing device of the invention;
FIG. 3 is an enlarged schematic view of position A of FIG. 2;
FIG. 4 is a schematic view showing the application of the anti-clogging long-life type converter bottom blowing device of the present invention.
Detailed Description
In order to better understand the technical solutions of the present invention, the following further describes the technical solutions of the present invention with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, the anti-clogging long-life converter bottom blowing device provided by the invention comprises an air inlet chamber 1, an air distribution chamber 2 and a blowing valve pipe 3.
One end of the air inlet chamber 1 is provided with an air inlet 4, the other end of the air inlet chamber is communicated with an air distribution chamber 2 through a filter 5, and the air distribution chamber 2 is communicated with an air blowing valve pipe 3.
The air blowing valve pipe 3 is set to be of a Tesla valve structure which is specifically as follows:
the lower end of the air-blowing valve pipe 3 is an inlet 301 which is communicated with the air-dividing chamber 2 through a mounting flange 6, the upper end is an outlet 302, and a main flow passage 303 (shown by a chain line on the air-blowing valve pipe 3 in fig. 2) is arranged between the upper end and the lower end.
A plurality of sub-flow passages 304 are communicated with the main flow passage 303, an independent closed loop is formed between each sub-flow passage 304 and the main flow passage 303, and the gas flowing through the sub-flow passages 304 from the main flow passage 303 finally returns to the main flow passage 303.
The plurality of branch channels 304 are distributed along the main channel 303 from bottom to top in turn from left to right.
The branch passage 304 includes a straight line section 305 and a circular arc section 306, one end of the straight line section 305 is communicated with the branch opening of the main passage 303, and the other end is communicated with one end of the circular arc section 306.
The other end of the arc segment 306 is communicated with a convergence port on the main flow channel 303, and the arc segment 306 enables the gas to change the direction and then flow into the main flow channel 303 again.
The included angle θ between the arc segment 306 and the main flow channel 303 is an obtuse angle, so that the airflow flowing out of the arc segment 306 pushes and accelerates the airflow in the main flow channel 303.
The number of the branch flow channels 304 is at least 4 in the main flow channel 303.
With reference to fig. 4, the present invention further provides an application of the anti-clogging long-life converter bottom blowing apparatus:
six anti-clogging and long-life converter bottom blowing devices of the invention are arranged on two concentric circumferences with different diameters at the bottom of the converter 100 and are arranged along the inner and outer ring circumferences in the clockwise direction according to the direction of an air outlet.
The positions of the converter 100 bottom which is provided with the anti-clogging and long-life converter bottom blowing device are all provided with air bricks 7, and the air bricks 7 are porous magnesia carbon bricks.
The inner diameter of the converter 100 is D, and two air bricks 7 are symmetrically arranged on the left side and the right side at the position where the inner ring circumference 200 with the diameter of 0.35D is intersected with the central connecting line 300 of the trunnion; four air bricks 7 are arranged on the left and right symmetrical sides of the circumference 400 of the outer ring with the diameter of 0.5D, and the two air bricks 7 on the same side are arranged on a diameter line which forms an angle of +/-alpha with the central connecting line 300 of the trunnion.
The angle α is 18 ° to 28 °, preferably 25 °.
Examples
Referring to fig. 1 to 3, the gas is blown from the gas inlet 4, passes through the filter 5 in the gas inlet chamber 1, and then enters the gas-dividing chamber 2. The gas sent from the gas-distributing chamber 2 is distributed into the gas-blowing valve tube 3. The air blow valve tube 3 is set to be a tesla valve structure, at least 4 branch channels 304 are provided, in this embodiment, 8 branch channels 304 are provided, the structure and arrangement are as shown in fig. 2, the diameter of the air blow valve tube 3 is 1 mm-20 mm, and the cross section of the tube may be circular, oblate or rectangular, but is not limited thereto.
The gas is stably kept at a high speed along a main flow passage 303 by an inlet 301 at the lower end of the gas blow valve pipe 3, passes through a Tesla valve structure and enters the furnace chamber of the converter from an outlet 302 at the lower end of the gas blow valve pipe 3. At the T-shaped junction of the main flow channel 303 and the sub-flow channel 304, a small amount of gas flows into the annular structure of the sub-flow channel 304 at a low speed, and the flow speed in the annular sub-flow channel 304 is quite low and almost static. When gas wants to enter reversely, the annular structure of the sub-flow channels 304 reduces the gas flow speed of the main flow channel 303, and simultaneously guides the gas to the T-shaped intersection, and the gas flow of the main flow channel 303 and the sub-flow channels 304 generates mutual interference, so that the effect of blocking reverse flow is achieved.
When the anti-blocking long-life converter bottom blowing device is manufactured, firstly, a prepared air blowing valve pipe 3 is welded on an upper cover of an air distribution chamber 2, the upper cover of the air distribution chamber 2 and the air blowing valve pipe 3 are fixed in a protective brick, and before filling and feeding, the end part of the air blowing valve pipe 3 is blocked by vaseline oil to prevent mud from entering the air blowing valve pipe 3 to block a pipeline. Slowly and uniformly feeding, and preventing the air blowing valve pipe 3 from inclining and the mud material from segregating.
After the pressing and the demoulding are finished, the surface of the air brick 7 is processed to be rough, so that the composite layer can be tightly combined with the brick core. And after the two times of pressing, processing the appearance of the air brick according to the drawing size to ensure that the size of the air brick meets the drawing requirement. And finally, installing a welding air chamber, baking, spraying a layer of coating to protect the air brick body after baking is finished, and drying the coating to obtain a finished product of the novel anti-blocking long-life converter bottom blowing element.
The layout of the finished product of the anti-clogging long-life type converter bottom blowing device of the invention on the converter 100 bottom is shown in figure 4, six anti-clogging long-life type converter bottom blowing devices of the invention are arranged on two circumferences with different diameters of the converter 100 bottom, wherein, the diameter of the converter 100 bottom is D, and the two anti-clogging long-life type converter bottom blowing devices of the invention are symmetrically arranged on a trunnion central connecting line 300 on the inner ring circumference (the diameter is 0.35D). The other four anti-blocking long-life converter bottom blowing devices are symmetrically arranged on a diameter line (alpha can be taken as 18-28 degrees) which is arranged on the circumference (diameter is 0.5D) of the outer ring and forms a +/-alpha angle with a central connecting line 300 of the trunnion.
Compared with the prior art, the anti-blocking long-life type converter bottom blowing device and the application thereof have the following characteristics:
1) The anti-blocking long-life converter bottom blowing device has the advantages that in practical production, the maintenance is simple, the blockage is not easy, the service life is long, and the purpose that the service life of the converter is more than 8000 or synchronous with the furnace age can be achieved;
2) The anti-blocking long-life type converter bottom blowing device has small gas resistance of the gas supply device in use, can allow the converter bottom blowing device to work under lower pressure (less than 0.4 Mp), is not easy to block a gun, and has strong re-circulation capability;
3) Because the gas supply device can work under a lower back pressure, the gas supply intensity can be adjusted in a larger range in production, thereby ensuring the requirement of the bottom gas supply intensity for the smelting of various steels from high-carbon steel to low-carbon steel and the like;
4) The height of the bottom blowing residual bricks is larger than 800mm after the furnace is removed, the whole structure is stable, and the metal Tesla valve tube has a reinforcing effect on surrounding refractory materials, so that the air brick is not easy to peel and crack.
In conclusion, the invention fully utilizes the physical characteristics of the Tesla valve tube, the valve has the biggest characteristic that no moving part exists, the unidirectional flow of fluid is realized only through the design of the flow passage, and when the fluid flows in the reverse direction, very large resistance occurs, and the principle is very simple: when the fluid flows reversely, the fluid is divided into two flows by the partitions, one flow of the fluid is opposite to the main flow of the fluid after being guided by the flow channel, so that large pressure loss occurs, and after the partitions, the pressure loss is gradually increased, so that the pressure difference between an inlet and an outlet is large, and resistance is formed, and only a small amount of fluid can pass through the fluid during the reverse flow; the forward flow does not occur, and the fluid can flow out along the main flow channel smoothly. Therefore, the molten steel can be effectively prevented from recharging, and the gun can work under lower gas pressure and is not easy to block. Finally, after experimental comparison of multiple layout schemes, the optimal element number and the optimal furnace bottom arrangement mode are optimized for the anti-blocking converter bottom blowing gas supply elements.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that the changes and modifications of the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.
Claims (10)
1. The utility model provides a prevent blockking up, long-lived type converter bottom blowing device which characterized in that: comprises an air inlet chamber, an air distribution chamber and an air blowing valve pipe;
one end of the air inlet chamber is provided with an air inlet, the other end of the air inlet chamber is communicated with the air distribution chamber through a filter, and the air distribution chamber is communicated with the air blowing valve pipe;
the air blowing valve pipe is of a Tesla valve structure.
2. The anti-clogging long-life type converter bottom blowing device according to claim 1, characterized in that: the lower end of the air blowing valve pipe is an inlet and is communicated with the air distribution chamber through a mounting flange, the upper end of the air blowing valve pipe is an outlet, and a main flow passage is arranged between the upper end and the lower end;
the main runner is communicated with a plurality of sub-runners, and an independent closed loop is formed between each sub-runner and the main runner.
3. The anti-clogging long-life type converter bottom blowing device according to claim 2, characterized in that: the sub-runners are distributed along the main runner from bottom to top in turn from left to right in sequence.
4. The anti-clogging long-life type converter bottom blowing device according to claim 2, characterized in that: the sub-runners comprise straight line segments and circular arc segments;
one end of the straight line section is communicated with the main flow passage, and the other end of the straight line section is communicated with one end of the circular arc section;
the other end of the circular arc section is communicated with the main runner.
5. The anti-clogging long-life type converter bottom blowing device according to claim 4, characterized in that: the included angle theta of the connection part of the circular arc section and the main flow channel is an obtuse angle.
6. The anti-clogging long-life type converter bottom blowing device according to claim 2, characterized in that: the number of the sub-runners is at least 4 on the main runner.
7. The anti-clogging long-life type converter bottom blowing device according to claim 2, characterized in that: the pipe diameter of the air blowing valve pipe is 1 mm-20 mm.
8. The application of the anti-blocking long-life converter bottom blowing device is characterized in that:
a plurality of the anti-clogging long-life type converter bottom blowing devices according to any one of claims 1 to 7 are arranged on two concentric circumferences of the converter bottom with different diameters, and are arranged clockwise along the circumferences of the inner ring and the outer ring according to the gas outlet direction.
9. The use of the anti-clogging long-life converter bottom blowing device according to claim 8, wherein: air bricks are arranged at the positions of the converter bottom where the anti-blocking long-life converter bottom blowing device is installed;
the inner diameter of the converter is D, and two air bricks are symmetrically arranged on the left side and the right side of the position where the inner ring circumference with the diameter of 0.35D is intersected with the central connecting line of the trunnion;
four air bricks are arranged on the circumference of the outer ring with the diameter of 0.5D in a bilateral symmetry mode, and the two air bricks on the same side are arranged on a diameter line which forms an angle of +/-alpha with the center connecting line of the trunnion.
10. The use of the anti-clogging long-life converter bottom blowing device according to claim 8, wherein: the air brick is a porous magnesia carbon brick;
the alpha angle is 18 DEG to 28 deg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718493.2A CN115595398A (en) | 2021-06-28 | 2021-06-28 | Anti-blocking long-life type converter bottom blowing device and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718493.2A CN115595398A (en) | 2021-06-28 | 2021-06-28 | Anti-blocking long-life type converter bottom blowing device and application thereof |
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| CN115595398A true CN115595398A (en) | 2023-01-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598336A (en) * | 1991-10-04 | 1993-04-20 | Nippon Steel Corp | Molten metal refining vessel and operation method thereof |
| CN2908521Y (en) * | 2006-04-29 | 2007-06-06 | 宝山钢铁股份有限公司 | Inclined hole type air brick for bottom-blowing of converter |
| CN201176446Y (en) * | 2008-04-09 | 2009-01-07 | 唐山建龙实业有限公司 | Bottom bowing layout structure for medium top-bottom combined blown converter |
| CN101487072A (en) * | 2009-02-23 | 2009-07-22 | 钢铁研究总院 | Multifunctional circular seam type gas supply element for steel melting |
| CN204111798U (en) * | 2014-10-29 | 2015-01-21 | 武汉钢铁(集团)公司 | For the bottom blowing layout structure of converter smelting device |
-
2021
- 2021-06-28 CN CN202110718493.2A patent/CN115595398A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0598336A (en) * | 1991-10-04 | 1993-04-20 | Nippon Steel Corp | Molten metal refining vessel and operation method thereof |
| CN2908521Y (en) * | 2006-04-29 | 2007-06-06 | 宝山钢铁股份有限公司 | Inclined hole type air brick for bottom-blowing of converter |
| CN201176446Y (en) * | 2008-04-09 | 2009-01-07 | 唐山建龙实业有限公司 | Bottom bowing layout structure for medium top-bottom combined blown converter |
| CN101487072A (en) * | 2009-02-23 | 2009-07-22 | 钢铁研究总院 | Multifunctional circular seam type gas supply element for steel melting |
| CN204111798U (en) * | 2014-10-29 | 2015-01-21 | 武汉钢铁(集团)公司 | For the bottom blowing layout structure of converter smelting device |
Non-Patent Citations (2)
| Title |
|---|
| 刘海洋等: "三通道特斯拉阀门结构设计与优化", 《轻工机械》, vol. 38, no. 3, pages 59 - 64 * |
| 刘海洋等: "特斯拉阀单向导通性研究", 《物理与工程》, vol. 30, no. 1, pages 120 - 124 * |
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Application publication date: 20230113 |