CN114634999A - Oxygen blast furnace gas ultrahigh-temperature heating smelting method - Google Patents
Oxygen blast furnace gas ultrahigh-temperature heating smelting method Download PDFInfo
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- CN114634999A CN114634999A CN202210301125.2A CN202210301125A CN114634999A CN 114634999 A CN114634999 A CN 114634999A CN 202210301125 A CN202210301125 A CN 202210301125A CN 114634999 A CN114634999 A CN 114634999A
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- 239000007789 gas Substances 0.000 title claims abstract description 152
- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000001301 oxygen Substances 0.000 title claims abstract description 29
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 29
- 238000003723 Smelting Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000003034 coal gas Substances 0.000 claims abstract description 99
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 19
- 239000010410 layer Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000005272 metallurgy Methods 0.000 claims description 6
- 241000242541 Trematoda Species 0.000 claims description 5
- 238000005261 decarburization Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000005262 decarbonization Methods 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims description 4
- 238000010310 metallurgical process Methods 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052799 carbon Inorganic materials 0.000 abstract description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 abstract 1
- 239000000571 coke Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000935974 Paralichthys dentatus Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B2005/005—Selection or treatment of the reducing gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an oxygen blast furnace gas ultra-high temperature heating smelting technology, which removes CO from the gas output by an oxygen blast furnace2Heating the latter part to 1200 ℃ through a traditional hot blast stove, heating the other part to more than 3500 ℃ after entering a plasma torch, mixing two paths of coal gas in a gas mixing chamber, spraying the mixed high-temperature coal gas of 1500-2000 ℃ and oxygen into the furnace through a blast furnace tuyere, and finishing the reduction reaction and the soft melting smelting process in the furnace; the invention further improves the gas heated by the hot blast stove through the high-temperature gas heated by the plasma moment, finally improves the temperature of the gas entering the stove to 1500-2000 ℃, replaces partial carbon consumption of the carbon reaction heat-release part of the blast furnace, and reduces the process fuel ratio of the blast furnace.
Description
Technical Field
The invention relates to the field of blast furnace metallurgy, in particular to a technical method for smelting oxygen blast furnace gas by ultrahigh temperature heating.
Background
The traditional blast furnace iron making adopts a blower to blow air to a hot blast furnace for heating, the heating medium is mostly pressurized air containing 21 percent of oxygen, furnace gas and combustion-supporting air are utilized to burn checker bricks in the hot blast furnace in a combustion chamber of the hot blast furnace, when the temperature of the checker bricks is raised to 1250-. The traditional hot blast stove at the present stage heats up to the maximum temperature of 1400 ℃ and consumes a certain amount of carbon.
In order to reduce the carbon consumption of a blast furnace, eight steels develop a top coal gas circulation oxygen blast furnace, total oxygen smelting replaces traditional blast smelting, output low-nitrogen coal gas is recycled after carbon dioxide is removed, and the purpose of reducing the carbon consumption is achieved, eight steels finish 50% of ultrahigh oxygen-enriched smelting targets in 2021 years, major breakthrough of a tuyere injection decarburization coal gas technology is realized for the first time, but low-temperature (25 ℃) coal gas is injected into a tuyere, and researches show that metallurgical coal gas is heated and then blown into the blast furnace, the carbon consumption of blast furnace procedures can be effectively reduced, the oxygen blast furnace needs to heat the coal gas, and higher heating temperature is required, but most of the existing coal gas heating furnaces are tubular heating furnaces or electric heating furnaces, the heating temperature is limited, the heating capacity is limited, and the highest heating temperature is about 1300 ℃; according to theoretical calculation, the theoretical combustion temperature in front of the blast furnace tuyere can reach about 2380 ℃ at most. The existing heating technology cannot meet the higher requirement of the gas temperature.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an oxygen blast furnace gas ultrahigh temperature heating smelting method.
The invention utilizes the plasma moment to heat the blast furnace decarbonized coal gas, utilizes the coal gas with 3000 ℃ after the plasma moment heating to further heat the coal gas heated by the hot blast stove, replaces the carbon consumption of the heat-releasing part of the blast furnace carbon reaction, and can reduce the metallurgical coal-to-coke ratio.
An oxygen blast furnace gas ultra-high temperature heating smelting system comprises a plasma rectangular body for heating high-pressure cold gas, a gas main pipe, a gas branch pipe and a gas surrounding pipe at a blast furnace tuyere, wherein the gas surrounding pipe is communicated with a blast furnace, the blast furnace top gas is communicated with a decarbonization device, and CO in the top gas is removed2，The decarbonization device is communicated with a pressurizer which is communicated with a gas main pipe, the upstream end of the gas branch pipe is communicated with the gas main pipe,the gas main pipe is provided with a hot blast stove, the gas branch pipe is provided with a plasma rectangular body, one path of high-pressure cold gas heats the gas through the hot blast stove, the other path of high-pressure cold gas heats through the plasma rectangular body, the gas branch pipe and the gas main pipe are gathered together through a gas mixing chamber, and the gas mixing chamber is communicated with the gas surrounding pipe.
Furthermore, the hot blast stove is arranged between the branch pipe of the coal gas main pipe and the mixing chamber, and heats one path of high-pressure cold coal gas to 1200 ℃.
Furthermore, a nozzle is arranged at the gas outlet end of the plasma rectangular body, the gas outlet end of the plasma rectangular body is connected to the gas mixing chamber through the nozzle, and the heated gas in the plasma rectangular body is sprayed out through the nozzle.
Furthermore, the nozzle comprises a protective sleeve with the outermost layer made of water-cooling copper, a layer of water-cooling pipe is spirally arranged on the inner surface, close to the protective sleeve, in the protective sleeve, a plurality of anchor flukes are uniformly fixed on the inner surface of the protective sleeve, an isolation layer formed by spraying high-temperature resistant materials is arranged on each anchor fluke, the water-cooling pipe and the protective sleeve are isolated from high-temperature coal gas in the nozzle, and the water-cooling pipe is arranged between the isolation layer and the protective sleeve.
Further, the gas mixing chamber comprises a shell made of water-cooled copper, and a layer of refractory material is arranged on the inner wall of the shell.
Furthermore, a layer of refractory material is arranged on the inner wall of a pipeline which is communicated between the gas mixing chamber and the gas surrounding pipe and between the gas surrounding pipe and the blast tuyere of the blast furnace, so that the pipeline is protected from being damaged due to overhigh gas temperature.
Furthermore, a circulating water channel is arranged outside the plasma rectangular body, and high-pressure cold water is introduced into the circulating water channel to protect the plasma rectangular body.
An oxygen blast furnace gas ultrahigh temperature heating smelting technology comprises the following specific steps:
s1: pressurizing the oxygen blast furnace decarburization coal gas by a pressurizer, and then increasing the pressure to 0.5-0.8 MPa.
S2: and introducing the pressurized high-pressure cold coal gas into a coal gas main pipe.
S3: the coal gas introduced into the main pipe of the coal gas main pipe is transported in two ways.
S4: and (4) heating one of the two paths of coal gas in the step S2 by a hot blast stove, and heating the other path of coal gas by a plasma torch.
S5: and (4) mixing the coal gas heated by the plasma moment in the step (S4) with the coal gas heated by the hot blast stove in a gas mixing chamber, heating the coal gas heated by the hot blast stove by the coal gas heated by the plasma moment, and increasing the temperature of the coal gas entering the blast furnace.
S6: and (4) feeding the high-temperature coal gas mixed in the step (S5) into a coal gas surrounding pipe at the tuyere of the blast furnace.
S7: high-temperature coal gas in the coal gas surrounding pipe is sent into the blast furnace together with other smelting substances through the air supply device at the air port of the blast furnace, and the metallurgical process is completed.
S8: and (4) decarbonizing the top gas after metallurgy.
S9: and (5) repeating the step S1 on the top coal gas subjected to decarburization in the step S8 for continuous reuse, so as to realize recycling.
Further, in the step S4, the hot blast stove heats the coal gas to 1200 ℃, and the plasma torch heats the coal gas to 3500 ℃.
Further, the temperature of the mixed gas in the step S5 reaches 1500-.
Further, in the step S5, during the heating of the gas by the plasma torch, the plasma torch uses clean electric energy.
Further, in the step S5, when the plasma rectangular body heats the gas, high-pressure cold water is used to protect the plasma rectangular body, so as to prevent the plasma rectangular body from being damaged by the high-temperature gas.
Further, the plasma torch in the step S5 allows the gas to be transferred through a flow rate greater than 60000 m/h when the gas is heated.
The high-pressure cold coal gas in the coal gas main pipe is divided into one path of coal gas to heat the coal gas through the plasma moment, then the high-temperature coal gas heated by the plasma moment and reaching 3500 ℃ is used for heating the other path of the high-temperature coal gas heated by the hot blast stove and reaching 1200 ℃, the temperature of the coal gas entering the blast furnace air port is increased to 1500-fold-2000 ℃, carbon consumption of a heat release part can be replaced by the blast furnace carbon reaction, the metallurgical coke ratio and the coal ratio can be reduced, the traditional blast furnace coke ratio is reduced to be below 200Kg/t, the fuel ratio is reduced to be 250-fold-300/t, the production cost is reduced, and the emission reduction of the traditional blast furnace carbon is realized by more than 40%.
Drawings
The invention is further illustrated by the figures and the detailed description.
FIG. 1 is a schematic view of the process of the present invention
FIG. 2 is a schematic view of the gas mixing chamber of the present invention
FIG. 3 is an axial view of a nozzle according to the present invention
FIG. 4 is a radial schematic view of a nozzle according to the present invention
In the figure: 1-shell, 2-protective layer, 3-fluke, 4-isolation layer, 5-protective sleeve, 6-water cooling pipe.
Detailed Description
An oxygen blast furnace gas ultra-high temperature heating smelting technology comprises a branch gas pipe led out from a main gas pipe, a hot blast stove is arranged on the main gas pipe, a plasma moment body is arranged on the other branch gas pipe, one branch of high-pressure cold gas heats the gas to 1200 ℃ through the hot blast stove, one branch of high-pressure cold gas heats to 3000 ℃ through the plasma moment, and 3000 ℃ high-temperature gas and 1200 ℃ gas are mixed in the main gas pipe to enable the temperature of the gas entering a wind inlet to reach 1500-plus-2000 ℃.
The lower end of the coal gas branch pipe is communicated with the coal gas main pipe through a gas mixing chamber, the gas mixing chamber is communicated with a coal gas surrounding pipe at the blast-furnace tuyere, and the coal gas surrounding pipe is connected to a tuyere air supply device through a bent pipe and a straight pipe.
The hot blast stove is arranged at the downstream section of the branch pipe of the main pipe and the upstream section of the mixing chamber, and heats one path of high-pressure cold coal gas to 1200 ℃.
The gas outlet end of the plasma rectangular body is provided with a nozzle, the gas outlet end of the plasma rectangular body is connected to the gas mixing chamber through the nozzle, and the heated gas in the plasma rectangular body is sprayed out through the nozzle.
The nozzle comprises a protective sleeve 5 which prevents the nozzle from cracking on the outermost layer, a layer of water-cooling pipe 6 is spirally arranged on the inner surface, clinging to the protective sleeve 5, of the protective sleeve 5, a plurality of anchor flukes 3 are uniformly fixed on the inner surface of the protective sleeve 5, a layer of isolation layer 4 formed by spraying high-temperature resistant materials is arranged on the anchor flukes 3, the water-cooling pipe 6 and the protective sleeve 5 are isolated from high-temperature coal gas in the nozzle, and the water-cooling pipe 6 is arranged between the isolation layer 4 and the protective sleeve 5.
The protective sleeve 5 is made of a material capable of bearing over 1100 ℃ for a long time, such as a water-cooling copper sleeve.
The gas mixing chamber comprises a shell made of water-cooled copper which can bear the temperature of more than 1100 ℃ for a long time, and a protective layer 2 made of high-temperature resistant material is arranged on the inner wall of the shell.
The inner walls of all the pipelines in front of the air mixing chamber to the blast furnace tuyere air supply device are provided with a layer of refractory material, so that the pipelines are protected from being damaged due to overhigh temperature of coal gas.
The gas mixing chamber connecting nozzle and the gas mixing chamber connecting hot blast stove are positioned at two sides of two teams, so that two paths of coal gas collide when entering the gas mixing chamber, the heat exchange efficiency of the two paths of coal gas is high, the heat exchange is more uniform, and the temperature of the coal gas entering the coal gas surrounding pipe is uniform.
And a circulating water channel is arranged outside the plasma rectangular body, high-pressure cold water is introduced into the circulating water channel to protect the plasma rectangular body, and the high-pressure cooling water inlet and outlet pipelines are monitored by flow meters and thermometers.
The coal gas main pipe is provided with a pressure gauge, a flow meter and a temperature meter, the running state of coal gas is monitored in real time, a flow regulating valve and the flow meter are arranged on a pipeline in front of the plasma moment rectangular body on the coal gas branch pipe to regulate and control the flow of the coal gas in the branch pipe, and a flow regulating valve, a pressure gauge, a temperature meter and a flow meter are arranged on the coal gas main pipe in front of the hot blast stove after the coal gas branch pipe is separated out, so that the flow of the coal gas entering the hot blast stove is regulated and controlled.
The plasma torch nozzle is provided with a pressure gauge, a thermometer and a flowmeter, the running state of the nozzle is monitored in real time, the gas mixing chamber is provided with a pressure gauge and a thermometer, and the gas surrounding pipe is provided with a pressure gauge, a thermometer and a flowmeter, and the running states of the gas mixing chamber and the gas surrounding pipe are monitored.
The gas main pipe is provided with a check valve and a stop valve at the upstream of the branched gas pipe, and the gas branched pipe is provided with a check valve and a stop valve at the upstream of the plasma moment.
A method for heating metallurgical gas by using plasma moment for blast furnace metallurgy comprises the following specific steps:
s1: pressurizing the oxygen blast furnace decarburization coal gas by a pressurizer, and then increasing the pressure to 0.5-0.8 MPa.
S2: and introducing the pressurized high-pressure cold coal gas into a coal gas main pipe.
S3: the coal gas introduced into the main pipe of the coal gas main pipe is transported in two ways.
S4: and (4) heating one of the two paths of coal gas in the step S2 by a hot blast stove, and heating the other path of coal gas by a plasma torch.
S5: and (4) mixing the coal gas heated by the plasma moment in the step (S4) with the coal gas heated by the hot blast stove in a gas mixing chamber, heating the coal gas heated by the hot blast stove by the coal gas heated by the plasma moment, and increasing the temperature of the coal gas entering the blast furnace.
S6: and (4) feeding the high-temperature coal gas mixed in the step (S5) into a coal gas surrounding pipe at the tuyere of the blast furnace.
S7: high-temperature coal gas in the coal gas surrounding pipe is sent into the blast furnace together with oxygen and coal powder through an air supply device at the tuyere of the blast furnace, and the metallurgical process is completed.
S8: and (4) decarbonizing the top gas after metallurgy.
S9: and repeating the step S1 to continuously reuse the decarbonized top gas.
The decarbonized blast furnace gas is used as the top gas for removing CO after the blast furnace reaction in the step S12The pressure of the pressurized decarbonized gas is 0.5-0.8MPa, and the production requirement is met.
In the process of heating the gas by the plasma moment body in the step S5, the plasma moment body uses clean power generated by wind power, photovoltaic and the like.
In the step S5, when the plasma rectangular body heats the gas, the plasma rectangular body is protected by using high-pressure cold water, so as to prevent the plasma rectangular body from being damaged by the high-temperature gas.
In the step S5, the plasma torch heats the coal gas, and the allowable flow rate is more than 60000m for cultivation/h.
The gas heated by the plasma torch in the step S5 is sent into the gas mixing chamber through the nozzle.
When the invention is used, metallurgical coal gas is pressurized by the pressurizer and then is separated into two paths for transportation in the coal gas main pipe, one path is heated by the plasma moment, the other path is heated by the hot blast stove, then the coal gas heated by the hot blast stove is heated by the coal gas heated by the plasma moment in the mixing chamber, and the temperature of the coal gas entering the tuyere of the blast furnace is improved. When the plasma moment is in fault, the stop valve and the check valve on the gas branch pipe are closed, the gas branch pipe is closed, high-pressure cold gas is heated only by the hot blast stove and is sent into the blast furnace, metallurgy can be continued only by increasing the coal ratio and the coke ratio, and normal production can be continued.
The high-pressure cold gas in the gas main pipe is divided into one path of gas to heat the gas through the plasma moment, then the high-temperature gas heated by the plasma moment and reaching 2500 ℃ is used for heating the gas heated by the hot blast stove and reaching 1200 ℃, the temperature of the gas entering the blast furnace air port is increased to 1500-fold-2000 ℃, the carbon consumption of a heat-radiating part of the blast furnace carbon reaction can be replaced, the metallurgical coke ratio and the coal ratio can be reduced, the coke ratio reaches 200Kg/t, the fuel ratio is reduced to 250-fold-300/t, and the production cost is reduced.
The invention can also improve the metallurgical coal ratio and the coke ratio when the plasma moment heating gas line has faults, and heat the gas through the hot blast stove to continue the metallurgical operation, thereby not influencing the normal production, avoiding the production stagnation caused by the shutdown maintenance due to the faults and reducing the yield.
Claims (10)
1. An oxygen blast furnace gas ultra-high temperature heating smelting system comprises a plasma rectangular body for heating high-pressure cold gas, a gas main pipe, a gas branch pipe and a gas surrounding pipe at a blast furnace tuyere, wherein the gas surrounding pipe is communicated with a blast furnace, the blast furnace top gas is communicated with a decarbonization device, and CO in the top gas is removed2，The decarbonization device is communicated with a pressurizer which is communicated with a gas main pipe, and the coal gas main pipe is characterized in that the upstream end of the gas branch pipe is communicated withThe gas main pipe is provided with a hot blast stove, the gas branch pipe is provided with a plasma rectangular body, one path of high-pressure cold gas heats the gas through the hot blast stove, the other path of high-pressure cold gas heats through the plasma rectangular body, the gas branch pipe and the gas main pipe are gathered together through a gas mixing chamber, and the gas mixing chamber is communicated with the gas surrounding pipe.
2. The oxygen blast furnace gas ultrahigh temperature heating smelting system according to claim 1, wherein the hot blast stove is arranged between a branch of the main gas pipe and the mixing chamber, and heats one path of high pressure cold gas to 1200 ℃.
3. The oxygen blast furnace gas ultrahigh-temperature heating smelting system according to claim 1, wherein the gas outlet end of the plasma rectangular body is provided with a nozzle, the gas outlet end of the plasma rectangular body is connected to the gas mixing chamber through the nozzle, and the heated gas in the plasma rectangular body is sprayed out through the nozzle.
4. The oxygen blast furnace gas ultra-high temperature heating smelting system according to claim 2, wherein the nozzle comprises a protective sleeve (5) with the outermost layer made of water-cooled copper, a layer of water-cooled tube (6) is spirally arranged in the protective sleeve (5) and clings to the inner surface of the protective sleeve (5), a plurality of anchor flukes (3) are uniformly fixed on the inner surface of the protective sleeve (5), an isolation layer (4) formed by spraying high-temperature refractory is arranged on the anchor flukes (3), the water-cooled tube (6) and the protective sleeve (5) are isolated from the high-temperature gas in the nozzle, and the water-cooled tube (6) is arranged between the isolation layer (4) and the protective sleeve (5).
5. The oxygen blast furnace gas ultrahigh temperature heating smelting system according to claim 1, characterized in that the gas mixing chamber comprises a shell (1) made of copper with water cooling, and a protective layer (2) made of high temperature resistant material is arranged on the inner wall of the shell (1).
6. The oxygen blast furnace gas ultrahigh temperature heating smelting system of claim 3, characterized in that the inner walls of the pipe from the gas mixing chamber to the gas bustle pipe to the pipe from the gas bustle pipe to the blast furnace tuyere are all provided with a layer of refractory material, so as to protect the pipe from being damaged by overhigh temperature of the gas.
7. The oxygen blast furnace gas ultrahigh-temperature heating smelting system according to claim 1, wherein a circulating water channel is arranged outside the plasma rectangular body, and high-pressure cold water is introduced into the circulating water channel to protect the plasma rectangular body.
8. An oxygen blast furnace gas ultrahigh temperature heating smelting technology comprises the following specific steps:
s1: pressurizing the oxygen blast furnace decarbonized coal gas by a pressurizer, and then increasing the pressure to 0.5-0.8 Mpa;
s2: introducing the pressurized high-pressure cold coal gas into a coal gas main pipe;
s3: transporting the coal gas introduced into the main pipe of the coal gas main pipe in two ways;
s4: heating one of the two paths of coal gas in the step S2 by a hot blast stove, and heating the other path of coal gas by a plasma torch;
s5: mixing the coal gas heated by the plasma moment in the step S4 with the coal gas heated by the hot blast stove in a gas mixing chamber;
s6: feeding the high-temperature coal gas mixed in the step S5 into a coal gas surrounding pipe at the tuyere of the blast furnace;
s7: feeding the high-temperature coal gas in the coal gas surrounding pipe into the blast furnace together with other smelting substances through an air supply device at the air port of the blast furnace to finish the metallurgical process;
s8: decarbonizing the top gas after metallurgy;
s9: and repeating the step S1 to recycle the top gas after decarburization.
9. The oxygen blast furnace gas ultrahigh temperature heating smelting technology according to claim 8, characterized in that the hot blast furnace heats the gas to 1200 ℃ in the step S4, and the plasma torch heats the gas to 3500 ℃.
10. The oxygen blast furnace gas ultrahigh temperature heating smelting technology as claimed in claim 8, wherein the temperature of the mixed gas in the step S5 reaches 1500-2000 ℃; in the process of heating the coal gas by the plasma moment body in the step S5, the plasma moment body uses clean electric energy; when the plasma rectangular body heats the coal gas in the step S5, the plasma rectangular body is protected by high-pressure cold water, so that the plasma rectangular body is prevented from being damaged by high-temperature coal gas; in the step S5, the plasma torch heats the coal gas, and the allowable flow rate is more than 60000m for cultivation/h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354098A (en) * | 2022-08-15 | 2022-11-18 | 新疆八一钢铁股份有限公司 | Smelting method for plasma heating of blast furnace gas by hydrogen-rich carbon circulation |
| CN115354094A (en) * | 2022-08-03 | 2022-11-18 | 中钢设备有限公司 | Efficient ecological metallurgy iron-making method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102356165A (en) * | 2009-03-17 | 2012-02-15 | 安赛乐米塔尔研究与发展有限责任公司 | Method for recirculating blast furnace gas, and associated device |
| CN107574273A (en) * | 2017-08-29 | 2018-01-12 | 武汉凯迪工程技术研究总院有限公司 | Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating |
| CN109477151A (en) * | 2017-05-04 | 2019-03-15 | 哈奇有限公司 | Heating plasma air blast |
| CN113718074A (en) * | 2021-09-03 | 2021-11-30 | 中冶赛迪工程技术股份有限公司 | Low-carbon blast furnace iron-making method |
-
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- 2022-03-25 CN CN202210301125.2A patent/CN114634999A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102356165A (en) * | 2009-03-17 | 2012-02-15 | 安赛乐米塔尔研究与发展有限责任公司 | Method for recirculating blast furnace gas, and associated device |
| CN109477151A (en) * | 2017-05-04 | 2019-03-15 | 哈奇有限公司 | Heating plasma air blast |
| CN107574273A (en) * | 2017-08-29 | 2018-01-12 | 武汉凯迪工程技术研究总院有限公司 | Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating |
| CN113718074A (en) * | 2021-09-03 | 2021-11-30 | 中冶赛迪工程技术股份有限公司 | Low-carbon blast furnace iron-making method |
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| CN115354094A (en) * | 2022-08-03 | 2022-11-18 | 中钢设备有限公司 | Efficient ecological metallurgy iron-making method |
| CN115354094B (en) * | 2022-08-03 | 2023-07-18 | 中钢设备有限公司 | Efficient ecological metallurgical iron-making method |
| CN115354098A (en) * | 2022-08-15 | 2022-11-18 | 新疆八一钢铁股份有限公司 | Smelting method for plasma heating of blast furnace gas by hydrogen-rich carbon circulation |
| CN115354098B (en) * | 2022-08-15 | 2023-07-28 | 新疆八一钢铁股份有限公司 | Smelting method for plasma heating of hydrogen-rich carbon circulating blast furnace gas |
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