CN114438268A - Boiling device and method for processing blast furnace hearth freezing - Google Patents
Boiling device and method for processing blast furnace hearth freezing Download PDFInfo
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- CN114438268A CN114438268A CN202210130543.XA CN202210130543A CN114438268A CN 114438268 A CN114438268 A CN 114438268A CN 202210130543 A CN202210130543 A CN 202210130543A CN 114438268 A CN114438268 A CN 114438268A
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- 238000007710 freezing Methods 0.000 title claims abstract description 32
- 230000008014 freezing Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009835 boiling Methods 0.000 title claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 114
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 114
- 239000001301 oxygen Substances 0.000 claims abstract description 114
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910052742 iron Inorganic materials 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 13
- 239000002893 slag Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000010079 rubber tapping Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 2
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 240000007643 Phytolacca americana Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The application provides a boiling device for treating freezing of a blast furnace hearth, which comprises a burning gun, two metal hoses and an operation control frame, wherein the burning gun comprises an inner oxygen pipe and an outer compressed air pipe, and the operation control frame comprises the oxygen pipe, the compressed air pipe, five valves and four pressure gauges; the application provides a burning method for treating freezing of a blast furnace hearth; compressed air parcel oxygen is passed through in this application, and switch cooperation through oxygen and compressed air, pressure fit and flow cooperation, limit oxygen burning melting limit high-pressure compressed air knife cutting, and compressed air outwards discharges the liquid melt in the melting hole fast, no longer the condensation is in the hole, thereby the speed of burning through that the furnace hearth freezes has been improved to showing, and it is better to burn the effect, and safer, avoided the secondary to stop the wind and with the wind gap iron tapping, the potential safety hazard of handling the furnace hearth and freezing the in-process has been eliminated, it is fast to have guaranteed that the blast furnace later stage adds the wind process, factor of safety is high.
Description
Technical Field
The invention relates to the technical field of blast furnace ironmaking, in particular to a boiling device and a boiling method for treating blast furnace hearth freezing.
Background
The hearth freezing is a fault in the blast furnace ironmaking process, and refers to the phenomenon that the temperature of the hearth is greatly reduced, slag and iron lose fluidity and cannot be discharged from a slag hole and an iron hole; the freezing of the furnace hearth causes great loss to production, and a great amount of manpower and material resources are consumed for the treatment; when the freezing is light, molten iron can still flow out of the iron notch, but slag is not discharged from the slag notch or is little discharged from the slag notch, and the temperature of slag and iron is low; when the freezing is serious, the slag hole and the iron notch are all solidified; the air pressure is increased due to the freezing of the furnace hearth, the air quantity is sharply reduced, the blanking is uneven, slag is gushed from the air port, the burning quantity is increased, and the water leakage after the air port is burnt is further aggravated to freeze.
The conventional method for treating furnace hearth freezing is to keep one to two air ports above an iron notch to supply air, block the rest air ports, simultaneously hold an oxygen pipe by a furnace operator in hand to continuously burn the iron notch below the air port until solidified slag iron between the iron notch and the air port is melted and flows out, the iron notch and the air port are communicated, and then gradually poke the surrounding air ports to slowly expand the warfare effect. When the freezing is serious, the iron notch is difficult to burn through, and only the air port beside the air supply air port can be used as a temporary iron notch for tapping, but the site environment is complicated and changeable, so that coke in the furnace can be collapsed and gushed out, even molten iron explodes, and the accident is enlarged.
At present, when a blast furnace is frozen, a worker uses an oxygen pipe to go into an iron notch, the oxygen pipe is frequently replaced, the worker stands around the iron notch, the temperature is high, splashed iron slag easily scalds the worker, the time and labor are wasted, the effect is poor, the consumption of the oxygen pipe is large, and the cost is high.
Disclosure of Invention
The invention aims to provide a boiling device for treating freezing of a blast furnace hearth. Another object of the present invention is to provide a firing method for dealing with the freezing of a blast furnace hearth.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a boiling device for treating freezing of a blast furnace hearth comprises a burning gun, two metal hoses and an operation control frame:
the burning gun is of an inner and outer sleeve structure and comprises an inner oxygen pipe and an outer compressed air pipe, and the inner oxygen pipe is sleeved in the outer compressed air pipe;
the operation control frame comprises an oxygen pipe, a compressed air pipe and an intermediate communicating pipe, wherein a pipe orifice at one end of the intermediate communicating pipe is communicated with the oxygen pipe, a pipe orifice at the other end of the intermediate communicating pipe is communicated with the compressed air pipe, and a fifth valve is arranged on the intermediate communicating pipe;
the oxygen pipe is provided with a first valve and a second valve, the positions of the first valve and the second valve on the oxygen pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe, the compressed air pipe is provided with a third valve and a fourth valve, and the positions of the third valve and the fourth valve on the compressed air pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe;
the oxygen pipe is provided with a first pressure gauge and a second pressure gauge which are used for measuring and displaying the oxygen pressure, the positions of the first pressure gauge and the second pressure gauge on the oxygen pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe, the compressed air pipe is provided with a third pressure gauge and a fourth pressure gauge which are used for measuring and displaying the compressed air pressure, and the positions of the third pressure gauge and the fourth pressure gauge on the compressed air pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe;
the gas inlet at one end of the oxygen pipe in the length direction is communicated with the gas outlet of an oxygen gas source, and the gas outlet at the other end of the oxygen pipe in the length direction is communicated with the gas inlet of an inner oxygen pipe in the burning gun through a metal hose;
the air inlet of one end of the length direction of the compressed air pipe is communicated with the air outlet of the compressed air source, and the air outlet of the other end of the length direction of the compressed air pipe is communicated with the air inlet of the outer compressed air pipe in the burning gun through another metal hose.
Preferably, the first valve, the first pressure gauge, the second valve and the second pressure gauge are arranged in sequence on the oxygen pipe in the direction from the air inlet of the oxygen pipe to the air outlet of the oxygen pipe.
Preferably, on the compressed air pipe, the third valve, the third pressure gauge, the fourth valve and the fourth pressure gauge are sequentially arranged in the direction from the air inlet of the compressed air pipe to the air outlet of the compressed air pipe.
Preferably, the first valve, the second valve, the third valve, the fourth valve and the fifth valve are all manual ball valves.
Preferably, the first pressure gauge, the second pressure gauge, the third pressure gauge and the fourth pressure gauge are all pointer pressure gauges.
A firing method for dealing with freezing of a blast furnace hearth, using the firing apparatus described in any one of the above, comprising the steps of, in order:
1) firstly, drilling an iron notch by using a drill bit with the diameter of 50-70 mm, and then confirming whether air is sucked into the furnace from the drilled iron notch;
when it is determined that no air suction is performed from the drilled iron notch to the inside of the furnace, the burning gun only sprays oxygen, and a cavity is burned at the front end of the mud sleeve by the oxygen;
2) embedding a burning gun, wherein the burning gun is controlled to only spray compressed air in the process of embedding the burning gun so as to prevent iron slag from blocking the gun head, and the contact part of the embedded burning gun and a mud sleeve is controlled not to leak air;
3) opening the oxygen after confirming that the air is not leaked, and controlling the pressure of the oxygen to be smaller than that of the compressed air;
early reduction of oxygen flow for ignition;
when the front end of the burning gun is judged to be burnt, the oxygen flow is gradually increased, and the compressed air is fully opened until the frozen hearth is burnt.
The utility model provides a handling blast furnace crucible freezes opens device, including burning the rifle, two metal collapsible tubes and operation control frame, burn the rifle and be interior outer sleeve structure of interior oxygen pipe and outer compressed air pipe, staff realizes only spouting oxygen, only spouts compressed air and spouts oxygen and compressed air simultaneously through carrying out the combination formula to five valves on the operation control frame or close, and through the aperture size of five valves on the control frame of control operation, can also control the flow size of oxygen and the flow size of compressed air, satisfy the gas flow needs of different stages such as ignition, burn and open;
the application provides a burning method for treating freezing of a blast furnace hearth, which comprises the steps of firstly drilling an iron notch by using a drill bit, then burning a cavity at the front end of a mud sleeve by using oxygen, then embedding a burning gun, firstly controlling the burning gun to only spray compressed air in the process of embedding the burning gun, then controlling low-flow oxygen for ignition in the early stage, gradually increasing the oxygen flow when judging that the front end of the burning gun is burnt, and fully opening the compressed air until the frozen hearth is burnt;
the method has the advantages that oxygen is arranged inside and outside the compressed air, the compressed air wraps the oxygen, the oxygen pressure is lower than the compressed air pressure, the oxygen is matched with the compressed air in a switch way, in a pressure fit way and in a flow fit way, the frozen iron and the oxygen are burnt into a molten liquid state, a molten hole is burnt on the frozen iron, the compressed air with higher pressure cuts the molten hole like an air knife, the molten hole is melted by oxygen combustion, and high-pressure compressed air is quickly discharged outwards from the molten hole by utilizing high-pressure blowing force and is not condensed in the hole any more, so that the burning-through speed of the freezing furnace cylinder is obviously improved, the burning-through speed of the furnace cylinder is 10 times of the freezing speed of the oxygen tube burning furnace cylinder in the prior art, the burning-through effect is better and safer, secondary blowing-down is avoided, and the phenomenon of iron discharging from an air port is avoided, the potential safety hazard in the process of treating the freezing of the furnace hearth is eliminated, and the fast later air adding process and the high safety factor of the blast furnace are ensured.
Drawings
Fig. 1 is a schematic structural diagram of an operation control rack in a boiling device for treating freezing of a blast furnace hearth according to an embodiment of the present application (arrows in fig. 1 represent gas flow directions);
fig. 2 is a schematic structural diagram of a burning gun in a burning device for treating freezing of a blast furnace hearth according to another embodiment of the present application (arrows in fig. 2 represent the flowing direction of gas);
in the figure: 1, burning a gun, 101 an inner oxygen pipe and 102 an outer compressed air pipe;
201 oxygen pipe, 2011 first valve, 2012 first pressure gauge, 2013 second valve, 2014 second pressure gauge;
202 compressed air pipe, 2021 third valve, 2022 third pressure gauge, 2023 fourth valve, 2024 fourth pressure gauge;
203 intermediate communication pipe, 2031 fifth valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "axial," "radial," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "horizontal," "vertical," and the like are used in an orientation or positional relationship indicated in actual practice, which is merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "left", "right", and the like, indicate orientations or positional relationships based on those in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-2, in the figure: the burning torch 1, the inner oxygen pipe 101 and the outer compressed air pipe 102; the oxygen pipe 201, the first valve 2011, the first pressure gauge 2012, the second valve 2013 and the second pressure gauge 2014; a compressed air pipe 202, a third valve 2021, a third pressure gauge 2022, a fourth valve 2023, and a fourth pressure gauge 2024; an intermediate communicating pipe 203 and a fifth valve 2031.
The application provides a handle frozen device of opening of blast furnace crucible, the device of opening is including burning rifle 1, two metal collapsible tube and operation control frame:
the burning torch 1 is of an inner and outer sleeve structure, the burning torch 1 comprises an inner oxygen pipe 101 and an outer compressed air pipe 102, and the inner oxygen pipe 101 is sleeved in the outer compressed air pipe 102;
the operation control frame comprises an oxygen pipe 201, a compressed air pipe 202 and an intermediate communicating pipe 203, wherein a nozzle at one end of the intermediate communicating pipe 203 is communicated with the oxygen pipe 201, a nozzle at the other end of the intermediate communicating pipe 203 is communicated with the compressed air pipe 202, and a fifth valve 2031 is arranged on the intermediate communicating pipe 203;
the oxygen pipe 201 is provided with a first valve 2011 and a second valve 2013, the first valve 2011 and the second valve 2013 are respectively positioned at the left side and the right side of the intermediate communicating pipe 203 on the oxygen pipe 201, the compressed air pipe 202 is provided with a third valve 2021 and a fourth valve 2023, and the third valve 2021 and the fourth valve 2023 are respectively positioned at the left side and the right side of the intermediate communicating pipe 203 on the compressed air pipe 202;
the oxygen pipe 201 is provided with a first pressure gauge 2012 and a second pressure gauge 2014 for measuring and displaying oxygen pressure, the positions of the first pressure gauge 2012 and the second pressure gauge 2014 on the oxygen pipe 201 are respectively positioned at the left side and the right side of the intermediate communicating pipe 203, the compressed air pipe 202 is provided with a third pressure gauge 2022 and a fourth pressure gauge 2024 for measuring and displaying compressed air pressure, and the positions of the third pressure gauge 2022 and the fourth pressure gauge 2024 on the compressed air pipe 202 are respectively positioned at the left side and the right side of the intermediate communicating pipe 203;
the air inlet at one end of the oxygen tube 201 in the length direction is used for being communicated with the air outlet of an oxygen gas source, and the air outlet at the other end of the oxygen tube 201 in the length direction is communicated with the air inlet of the inner oxygen tube 101 in the burning gun 1 through a metal hose;
the air inlet at one end of the compressed air pipe 202 in the length direction is communicated with the air outlet of a compressed air source, and the air outlet at the other end of the compressed air pipe 202 in the length direction is communicated with the air inlet of the outer compressed air pipe 102 in the burning gun 1 through another metal hose.
In an embodiment of the present application, on the oxygen pipe 201, the first valve 2011, the first pressure gauge 2012, the second valve 2013, and the second pressure gauge 2014 are sequentially arranged in a direction from the inlet of the oxygen pipe 201 to the outlet of the oxygen pipe 201.
In one embodiment of the present application, the third valve 2021, the third pressure gauge 2022, the fourth valve 2023, and the fourth pressure gauge 2024 are arranged in series on the compressed air pipe 202 in a direction from the air inlet of the compressed air pipe 202 to the air outlet of the compressed air pipe 202.
In one embodiment of the present application, the first valve 2011, the second valve 2013, the third valve 2021, the fourth valve 2023, and the fifth valve 2031 are all manual ball valves.
In an embodiment of the present application, the first pressure gauge 2012, the second pressure gauge 2014, the third pressure gauge 2022, and the fourth pressure gauge 2024 are all pointer type pressure gauges.
In this application, the left and right sides of middle communicating pipe 203 is promptly the upstream side and the downstream side of the air inlet of middle communicating pipe 203 or gas outlet, promptly first valve 2011 and second valve 2013 are in position on the oxygen hose 201 is for being located respectively the upstream side and the downstream side of the junction of middle communicating pipe and oxygen hose, and remaining with this the same reason.
The application provides a boiling method for treating freezing of a blast furnace hearth, which uses the boiling device in any one of the above steps and comprises the following steps of:
1) firstly, drilling an iron notch by using a drill bit with the diameter of 50-70 mm, and then confirming whether air is sucked into the furnace from the drilled iron notch;
when it is determined that air is not sucked into the furnace from the drilled iron notch, the burning gun 1 only sprays oxygen, and a cavity is burned at the front end of the mud sleeve by the oxygen;
2) burying the burning torch 1, wherein in the process of burying the burning torch 1, the burning torch 1 is controlled to only spray compressed air to prevent iron slag from blocking the torch head, and the contact position of the buried burning torch 1 and a mud sleeve is controlled not to leak air;
3) opening the oxygen after confirming that the air is not leaked, and controlling the pressure of the oxygen to be smaller than that of the compressed air;
early reduction of oxygen flow (control of low flow oxygen) for ignition;
when the front end of the burning gun 1 is judged to be burnt, the oxygen flow is gradually increased, and the compressed air is fully opened until the frozen furnace hearth is burnt.
In one embodiment of the present application, in step 3), it is determined whether the frozen hearth is boiled or not by the display gauge pressure of the second pressure gauge 2014 and the display gauge pressure of the fourth pressure gauge 2024.
In this application, iron can not burn in the air, and iron violently burns in the pure oxygen, and mars four shoots, and this application utilizes oxygen and freezes the iron burning reaction that takes place, emits a large amount of heats simultaneously, burns out the iron that will freeze and burns out.
In this application, the front end of burning rifle 1 has been burning, because burning rifle 1 is steel material (ordinary carbon steel) usually, and is the same with the material of the oxygen hose among the prior art, consequently, the burning here both includes the combustion reaction that oxygen and frozen iron take place, still includes the combustion reaction that oxygen and burning rifle 1 take place, burns rifle 1 promptly and also is the consumptive part, after burning rifle 1 burning shortens gradually and makes the worker endanger worker's personal safety near the iron notch gradually, just need a burning rifle 1 of renewal.
In the present application, the oxygen is preferably industrial oxygen, and the concentration of the industrial oxygen is 95% to 99.8% (volume fraction).
In this application, tap hole mud cover is the mud package that the back sprue blocking mud formed of tapping.
The utility model provides a handle frozen boiling device of blast furnace crucible, including burning rifle 1, two metal collapsible tubes and operation control frame, burning rifle 1 is the inside and outside sleeve pipe structure of interior oxygen pipe 101 and external compressed air pipe 102, and staff realizes only spouting oxygen, only spouts compressed air and spouts oxygen and compressed air simultaneously through carrying out the combination formula to five valves on the operation control frame to open or close, and through the aperture size of five valves on the control operation control frame of control, can also control the flow size of oxygen and the flow size of compressed air, satisfy the gas flow needs of different stages such as ignition, boil;
the application provides a burning method for treating freezing of a blast furnace hearth, which comprises the steps of firstly drilling an iron notch by using a drill bit, then burning a cavity at the front end of a mud sleeve by using oxygen, then burying a burning gun 1, firstly controlling the burning gun 1 to only spray compressed air in the process of burying the burning gun 1, then controlling small-flow oxygen for ignition in the early stage, gradually increasing the oxygen flow when judging that the front end of the burning gun 1 is burnt, and fully opening the compressed air until the frozen hearth is burnt;
the method has the advantages that oxygen is arranged inside and outside the compressed air, the compressed air wraps the oxygen, the oxygen pressure is lower than the compressed air pressure, the oxygen is matched with the compressed air in a switch way, in a pressure fit way and in a flow fit way, the frozen iron and the oxygen are burnt into a molten liquid state, a molten hole is burnt on the frozen iron, the compressed air with higher pressure cuts the molten hole like an air knife, the molten hole is melted by oxygen combustion, and high-pressure compressed air is quickly discharged outwards from the molten hole by utilizing high-pressure blowing force and is not condensed in the hole any more, so that the burning-through speed of the freezing furnace cylinder is obviously improved, the burning-through speed of the furnace cylinder is 10 times of the freezing speed of the oxygen tube burning furnace cylinder in the prior art, the burning-through effect is better and safer, secondary blowing-down is avoided, and the phenomenon of iron discharging from an air port is avoided, the potential safety hazard in the process of treating the freezing of the furnace hearth is eliminated, and the fast later air adding process and the high safety factor of the blast furnace are ensured.
Methods and devices not described in detail in the present invention are all the prior art and are not described in detail.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a handle frozen boiling device of blast furnace crucible which characterized in that, boiling device includes burning rifle, two metal collapsible tube and operation control frame:
the burning gun is of an inner and outer sleeve structure and comprises an inner oxygen pipe and an outer compressed air pipe, and the inner oxygen pipe is sleeved in the outer compressed air pipe;
the operation control frame comprises an oxygen pipe, a compressed air pipe and an intermediate communicating pipe, wherein a pipe orifice at one end of the intermediate communicating pipe is communicated with the oxygen pipe, a pipe orifice at the other end of the intermediate communicating pipe is communicated with the compressed air pipe, and a fifth valve is arranged on the intermediate communicating pipe;
the oxygen pipe is provided with a first valve and a second valve, the positions of the first valve and the second valve on the oxygen pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe, the compressed air pipe is provided with a third valve and a fourth valve, and the positions of the third valve and the fourth valve on the compressed air pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe;
the oxygen pipe is provided with a first pressure gauge and a second pressure gauge which are used for measuring and displaying the oxygen pressure, the positions of the first pressure gauge and the second pressure gauge on the oxygen pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe, the compressed air pipe is provided with a third pressure gauge and a fourth pressure gauge which are used for measuring and displaying the compressed air pressure, and the positions of the third pressure gauge and the fourth pressure gauge on the compressed air pipe are respectively positioned at the left side and the right side of the intermediate communicating pipe;
the gas inlet at one end of the oxygen pipe in the length direction is communicated with the gas outlet of an oxygen gas source, and the gas outlet at the other end of the oxygen pipe in the length direction is communicated with the gas inlet of an inner oxygen pipe in the burning gun through a metal hose;
the air inlet of one end of the length direction of the compressed air pipe is communicated with the air outlet of the compressed air source, and the air outlet of the other end of the length direction of the compressed air pipe is communicated with the air inlet of the outer compressed air pipe in the burning gun through another metal hose.
2. The boiling device for treating freezing of a blast furnace hearth according to claim 1, wherein said first valve, said first pressure gauge, said second valve, and said second pressure gauge are arranged in the oxygen pipe in the order from the inlet of the oxygen pipe to the outlet of the oxygen pipe.
3. The boiling device for treating the freezing of the hearth of the blast furnace according to claim 1, wherein the third valve, the third pressure gauge, the fourth valve and the fourth pressure gauge are arranged on the compressed air pipe in sequence from the air inlet of the compressed air pipe to the air outlet of the compressed air pipe.
4. The apparatus of claim 1, wherein the first, second, third, fourth and fifth valves are manual ball valves.
5. The boiling device for treating the freezing of the furnace hearth of the blast furnace as claimed in claim 1, wherein the first pressure gauge, the second pressure gauge, the third pressure gauge and the fourth pressure gauge are pointer pressure gauges.
6. A firing method for dealing with freezing of a blast furnace hearth, characterized by using the firing apparatus according to any one of claims 1 to 5, comprising the steps of, in order:
1) firstly, drilling an iron notch by using a drill bit with the diameter of 50-70 mm, and then confirming whether air is sucked into the furnace from the drilled iron notch;
when it is determined that air is not sucked into the furnace from the drilled iron notch, the burning gun only sprays oxygen, and a cavity is burned at the front end of the mud sleeve by the oxygen;
2) embedding a burning gun, wherein the burning gun is controlled to only spray compressed air in the process of embedding the burning gun so as to prevent iron slag from blocking the gun head, and the contact part of the embedded burning gun and a mud sleeve is controlled not to leak air;
3) opening the oxygen after confirming that the air is not leaked, and controlling the pressure of the oxygen to be smaller than that of the compressed air;
early reduction of oxygen flow for ignition;
when the front end of the burning gun is judged to be burnt, the oxygen flow is gradually increased, and the compressed air is fully opened until the frozen hearth is burnt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210130543.XA CN114438268A (en) | 2022-02-11 | 2022-02-11 | Boiling device and method for processing blast furnace hearth freezing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210130543.XA CN114438268A (en) | 2022-02-11 | 2022-02-11 | Boiling device and method for processing blast furnace hearth freezing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115198044A (en) * | 2022-06-30 | 2022-10-18 | 南京钢铁股份有限公司 | Method for rapidly processing blast furnace hearth freezing |
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| JP6947345B1 (en) * | 2020-05-15 | 2021-10-13 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| CN113584248A (en) * | 2021-08-25 | 2021-11-02 | 新疆八一钢铁股份有限公司 | Iron notch oxygen lance system for Europe smelting furnace |
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| CN115198044A (en) * | 2022-06-30 | 2022-10-18 | 南京钢铁股份有限公司 | Method for rapidly processing blast furnace hearth freezing |
| CN115198044B (en) * | 2022-06-30 | 2023-09-22 | 南京钢铁股份有限公司 | Method for rapidly treating freezing of blast furnace hearth |
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Application publication date: 20220506 |