CN114561520A - Hydrogen-rich cyclic annealing process for cold-rolled oil drum plate - Google Patents
Hydrogen-rich cyclic annealing process for cold-rolled oil drum plate Download PDFInfo
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- CN114561520A CN114561520A CN202210206052.9A CN202210206052A CN114561520A CN 114561520 A CN114561520 A CN 114561520A CN 202210206052 A CN202210206052 A CN 202210206052A CN 114561520 A CN114561520 A CN 114561520A
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 106
- 239000001257 hydrogen Substances 0.000 title claims abstract description 106
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000000137 annealing Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 40
- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000004321 preservation Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 5
- 238000001953 recrystallisation Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005097 cold rolling Methods 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000006392 deoxygenation reaction Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 238000007664 blowing Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 24
- 238000011084 recovery Methods 0.000 description 14
- 208000028659 discharge Diseases 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a hydrogen-rich cyclic annealing process for a cold-rolled oil drum plate, which comprises the following chemical components: the method comprises the following steps of placing a hot-rolled and cold-rolled oil drum plate cold-rolled steel coil with the C content of 0.04-0.08%, the Si content of 0.02-0.03%, the Mn content of 0.26-0.33%, the P content of less than 0.01%, the S content of less than 0.005%, and the balance of Fe and residual elements on a furnace hearth of a hood-type annealing furnace, buckling an inner hood, buckling a heating hood, connecting a medium pipeline, blowing air by nitrogen and blowing nitrogen by hydrogen, adopting a heat preservation process of 430 ℃ and 680 ℃, preserving heat for 3 hours at 430 ℃, carrying out recrystallization temperature annealing at 680 ℃ for 7 hours, collecting hydrogen tail gas discharged in the annealing process through a main pipeline, and obtaining hydrogen with the hydrogen purity of 99.999%, the dew point of below 65 ℃ and the oxygen content of below 5ppm, so as to realize the cyclic utilization of the hydrogen; and (3) flattening the annealed steel coil by using the elongation of 1.1%, and cleaning the surface of the steel coil by using flattening liquid with the concentration of 3-5% to obtain an oil drum plate product with a high surface.
Description
Technical Field
The invention relates to a hydrogen-rich cyclic annealing process for a cold-rolled oil drum plate.
Background
The cold-rolling annealing furnace adopts hydrogen as protective atmosphere, and because the hydrogen has good oxidation resistance, the cold-rolling steel coil with a non-oxidation high surface can be obtained by annealing and heating under the action of the protective atmosphere, the hydrogen tail gas in the prior art is not recycled, the hydrogen consumption is high, and 2-2.3 cubic meters of hydrogen is consumed for producing one ton of steel. The high-grade oil barrel plate has high purity and high value of contained oil, and has very strict requirements on the surface quality of a cold-rolled steel plate.
In the state of the art: the once-used hydrogen is discharged into the atmosphere along with the tail gas after simple treatment of the waste gas, and is not recycled. The off-gas contains impure hydrogen, impurities and the like, and is difficult to reuse without purification treatment. The hydrogen can enhance the heat transfer capacity, and the heating and cooling speed is improved by about 40 to 50 percent. The surface roughness of the strip steel is obviously reduced. The hydrogen molecule has strong permeability and acts with the lubricant attached to the surface of the strip steel to accelerate the evaporation speed, and evaporant generated in the material pile does not crack when contacting with the outer layer of the strip steel under the condition of small temperature difference. Because the density of hydrogen is small, the power consumption of the furnace platform fan is reduced rapidly after the temperature is raised, and the energy consumption is obviously reduced because the heat treatment period is shortened. The hydrogen consumption has a large correlation with the product quality.
The annealing parameters of the prior art are as follows:
the preheating stage is from room temperature to 400 ℃, and the heating speed is 50-100 ℃/h. In the heating stage, the steel coil is heated to the heat preservation temperature from 400 ℃, and the temperature rise speed is 30-80 ℃/h.
And (3) searching documents: in the domestic prior art:
1. the invention patent (under examination) filed by fusstein metallurgy technology (shanghai) ltd, "a hydrogen recovery system of a cold rolling processing line annealing furnace", patent No. CN201810419014.5, provides a hydrogen recovery system of a cold rolling processing line annealing furnace, comprising: the device comprises a treatment line annealing furnace, strip steel, a discharge port, a main discharge recovery treatment system and a secondary discharge recovery treatment system, wherein the strip steel runs in the treatment line annealing furnace, and the treatment line annealing furnace is respectively connected with the main discharge recovery treatment system and the secondary discharge recovery treatment system through the discharge port. Compared with the traditional technology, the waste hydrogen power generation and waste heat recovery system based on the fuel cell and the waste heat recovery device adopts the integrated technology of combining a cold rolling processing line of an iron and steel plant, the hydrogen fuel cell and the waste heat recovery device; different recycling processes are determined according to the discharge amount of the waste hydrogen, so that the problem that the waste hydrogen of the traditional cold rolling treatment line cannot be recycled is solved.
2. The invention patent 'an all-hydrogen bell-type furnace hydrogen recovery process and system for cold rolling annealing' reported by Angang group engineering technology Limited company, patent No. CN201410377827.4, provides the invention and relates to an all-hydrogen bell-type furnace hydrogen recovery process and system for cold rolling annealing, and hydrogen outlets at the bottom of all-hydrogen bell-type furnaces are connected to a hydrogen main pipe through hydrogen pipelines; the hydrogen discharged after purging of the full-hydrogen bell-type furnace is pressurized by the hydrogen compressor and then is conveyed to the hydrogen tank for storage, the hydrogen in the hydrogen tank is subjected to redundant oxygen removal through the molecular sieve, the filtered hydrogen is detected by the hydrogen/oxygen detector, the qualified hydrogen meeting the use requirement is conveyed back to the full-hydrogen bell-type furnace through the hydrogen recycling pipeline for recycling, and the unqualified hydrogen is conveyed to the hydrogen main pipe at the upstream of the hydrogen compressor through the hydrogen returning pipeline for retreatment. The invention realizes the hydrogen recycling and ensures the production safety.
3. The invention relates to a hydrogen recovery device for a vertical bright annealing line, which is invented by Aiberna industrial furnace (Taicano) Limited and is called a 'vertical bright annealing line hydrogen recovery device', and is called CN201410377827.4, and the hydrogen recovery device comprises the following components: the device comprises an active carbon filter for removing lubricating oil residues or pollutants in hydrogen, a paper filter for removing dust in the hydrogen, a catalytic converter for removing oxygen in the hydrogen and a molecular sieve adsorption component for controlling the dew point temperature of the hydrogen, wherein the components are connected through a closed pipeline and are provided with valve bodies for controlling the components and the pipeline. The invention can effectively recycle the used hydrogen, maximally save 55% of hydrogen consumption, and effectively play the effects of saving energy, reducing pollution emission and protecting environment.
Disclosure of Invention
According to the cold-rolled oil drum plate hydrogen-rich cyclic annealing process, the hydrogen usage amount is increased in the annealing process, the surface control capability in the annealing process can be greatly improved, and the surface quality of oil drum plate products is improved.
The invention relates to a hydrogen-rich cyclic annealing process for a cold-rolled oil drum plate, which comprises the following specific implementation steps of:
1) step one, chemical components of a steel coil: c content of 0.04-0.08%, Si content of 0.02-0.03%, Mn content of 0.26-0.33%, P less than 0.01%, S less than 0.005%, and the balance of Fe and residual elements, placing the oil drum plate cold-rolled steel coil subjected to hot rolling and cold rolling on a bell-type annealing furnace hearth, buckling an inner cover, then buckling a heating cover, connecting a medium pipeline, purging air by nitrogen, purging nitrogen by hydrogen, and annealing according to the following annealing process;
the oil drum plate annealing process parameters are as follows:
by adopting two heat preservation processes of 430 ℃ and 680 ℃, emulsion residues on the surface of the steel coil can be swept and volatilized after heat preservation is carried out for 3 hours at 430 ℃, the surface residues are ensured to be few, recrystallization temperature annealing is carried out after annealing and heat preservation are carried out for 7 hours at 680 ℃, deformed grains are recrystallized into uniform equiaxial grains, deformation strengthening and residual stress are eliminated, and hydrogen tail gas discharged in the annealing process is collected through a main pipeline;
2) step two, the collected hood type withdrawal furnace tail gas firstly passes through a cooler to be cooled to the temperature close to the normal temperature, and then enters a primary processor to remove oil substances, emulsifying agents, solid particles and liquid water in the tail gas; then stabilizing the air pressure through a buffer tank; the gas with stable pressure enters a Roots blower to be pressurized, so that the pressure of the gas is increased to 0.01-0.03 MPa; then the gas enters the buffer tank again to stabilize the gas pressure; secondly, removing oil substances, emulsifying agents, solid particles and liquid water impurities for the second time through a secondary processor; secondly, pressurizing by a hydrogen compressor for the second time, and increasing the pressure to 0.5-0.8 MPa; then the gas enters a gas purification device for purification, and the oxygen molecules in the gas react with the hydrogen molecules to generate water under the action of a deoxygenation catalyst through a catalytic deoxygenator; then the temperature of the gas is reduced to normal temperature through a water cooler, and finally the gas enters a pressure swing adsorption separation system to separate macromolecular gases such as nitrogen, carbon dioxide and the like remained in the gas from the hydrogen to obtain the hydrogen with the purity of 99.999 percent, the dew point of below 65 ℃ below zero and the oxygen content of below 5 ppm;
3) thirdly, the hydrogen is sent to a hydrogen supply pipeline in front of the furnace through a flowmeter and a pressure regulating and stabilizing valve, is converged with the hydrogen supplied by an external network energy pipeline, and enters the bell-type furnace through the hydrogen supply pipeline for recycling, so that the hydrogen is recycled;
4) and step four, carrying out flattening treatment on the annealed steel coil by using the elongation of 1.1%, and cleaning the surface of the steel coil by using flattening liquid with the concentration of 3-5% to obtain an oil drum plate product with a high surface.
The invention is used for producing high-surface oil drum plate products, adopts two annealing temperature heat preservation processes of 430 ℃ and 680 ℃, implements hydrogen-rich annealing under the atmosphere of large-flow hydrogen protection, and the annealed steel coil is subjected to leveling treatment with 1.1% elongation. The tail gas containing hydrogen released in the annealing process is subjected to impurity removal in a mode of combining a physical method and a chemical method, and high-purity hydrogen is obtained again through two steps of filtering and separating. Oil substances, emulsifying agents, solid particles and liquid water in the tail gas are filtered through multi-stage filtration, so that impurities in the tail gas can be filtered completely; and (3) separating macromolecular gases such as nitrogen, carbon dioxide and the like contained in the tail gas by an adsorption and regeneration separator and a pressure swing adsorption device to finally obtain the high-purity hydrogen. The technological process adopts the gas temperature reduction of a cooler, and the system pressure is stabilized through a buffer tank.
The oil drum plate produced by the process has good mechanical property and surface quality, is applied to the manufacture of high-grade oil drums, and is verified to be reliable through repeated tests. Mass production can be achieved under the above-mentioned control point requirements.
By combining the experiments and the comparison of the prior art, the method has good market prospect, and the oil drum plate product has smooth and clean surface quality and beautiful atmosphere, and can be popularized and applied to the cold rolling annealing process. The hydrogen recycling process is adopted, the energy utilization rate is high, and the process adopting the two heat preservation temperatures of 430 ℃ and 680 ℃ can be applied to the annealing production process of the cold-rolled products with the same type and high surface quality requirements.
Detailed Description
The invention discloses a hydrogen-rich cyclic annealing process for a cold-rolled oil barrel plate, which comprises the following steps:
the method comprises the following specific implementation steps:
1) step one, chemical components of a steel coil: c content of 0.04-0.08%, Si content of 0.02-0.03%, Mn content of 0.26-0.33%, P less than 0.01%, S less than 0.005%, and the balance of Fe and residual elements, placing the oil drum plate cold-rolled steel coil subjected to hot rolling and cold rolling on a bell-type annealing furnace hearth, buckling an inner cover, then buckling a heating cover, connecting a medium pipeline, purging air by nitrogen, purging nitrogen by hydrogen, and annealing according to the following annealing process;
the parameters of the oil drum plate annealing process are as follows:
by adopting two heat preservation processes of 430 ℃ and 680 ℃, emulsion residues on the surface of the steel coil can be swept and volatilized after heat preservation is carried out for 3 hours at 430 ℃, the surface residues are ensured to be few, recrystallization temperature annealing is carried out after annealing and heat preservation are carried out for 7 hours at 680 ℃, deformed grains are recrystallized into uniform equiaxial grains, deformation strengthening and residual stress are eliminated, and hydrogen tail gas discharged in the annealing process is collected through a main pipeline;
2) step two, the collected hood type withdrawal furnace tail gas firstly passes through a cooler to be cooled to the temperature close to the normal temperature, and then enters a primary processor to remove oil substances, emulsifying agents, solid particles and liquid water in the tail gas; then stabilizing the air pressure through a buffer tank; the gas with stable pressure enters a Roots blower to be pressurized, so that the pressure of the gas is increased to 0.01-0.03 MPa; then the gas enters the buffer tank again to stabilize the gas pressure; secondly, removing oil substances, emulsifying agents, solid particles and liquid water impurities for the second time through a secondary processor; secondly, secondarily pressurizing by a hydrogen compressor, and increasing the pressure to 0.5-0.8 MPa; then the gas enters a gas purification device for purification, and the oxygen molecules in the gas react with the hydrogen molecules to generate water under the action of a deoxygenation catalyst through a catalytic deoxygenator; then the temperature of the gas is reduced to normal temperature through a water cooler, and finally the gas enters a pressure swing adsorption separation system to separate macromolecular gases such as nitrogen, carbon dioxide and the like remained in the gas from the hydrogen to obtain the hydrogen with the purity of 99.999 percent, the dew point of below 65 ℃ below zero and the oxygen content of below 5 ppm;
3) thirdly, the hydrogen is sent to a hydrogen supply pipeline in front of the furnace through a flowmeter and a pressure regulating and stabilizing valve, is converged with the hydrogen supplied by an external network energy pipeline, and enters the bell-type furnace through the hydrogen supply pipeline for recycling, so that the hydrogen is recycled;
4) and step four, carrying out flattening treatment on the annealed steel coil by using the elongation of 1.1%, and cleaning the surface of the steel coil by using flattening liquid with the concentration of 3-5% to obtain an oil drum plate product with a high surface.
Example 1
Using 4 coils of 1.0 × 920mm cold-rolled hard coils to carry out cover annealing process treatment, annealing the coils in 7 stages, applying a large-flow hydrogen blowing process, keeping the temperature at 430 ℃ for 3 hours, and keeping the temperature at 30 m3Blowing at hydrogen flow rate of/h for 3 hr, maintaining at 680 deg.C for 7 hr, and keeping pressure at 25 m for 3 hr3Purging is carried out at a hydrogen flow rate/h. And the hydrogen tail gas in the annealing process is filtered and separated and then is recycled.
And (4) carrying out a leveling machine on the annealed steel coil, and rolling the steel coil according to the leveling elongation of 1.1% to eliminate a yield platform. The leveling process uses 4% of leveling liquid for cleaning, residues on the surface of the annealed oil drum steel coil can be thoroughly removed, the surface quality with the reflectivity of 65% is obtained, and the mechanical property is excellent.
Claims (1)
1. A hydrogen-rich cyclic annealing process for a cold-rolled oil drum plate is characterized by comprising the following specific implementation steps of:
1) step one, chemical components of a steel coil: c content of 0.04-0.08%, Si content of 0.02-0.03%, Mn content of 0.26-0.33%, P less than 0.01%, S less than 0.005%, and the balance of Fe and residual elements, placing the oil drum plate cold-rolled steel coil subjected to hot rolling and cold rolling on a bell-type annealing furnace hearth, buckling an inner cover, then buckling a heating cover, connecting a medium pipeline, purging air by nitrogen, purging nitrogen by hydrogen, and annealing according to the following annealing process;
the parameters of the oil drum plate annealing process are as follows:
by adopting two heat preservation processes of 430 ℃ and 680 ℃, emulsion residues on the surface of the steel coil can be swept and volatilized after heat preservation is carried out for 3 hours at 430 ℃, the surface residues are ensured to be few, recrystallization temperature annealing is carried out after annealing and heat preservation are carried out for 7 hours at 680 ℃, deformed grains are recrystallized into uniform equiaxial grains, deformation strengthening and residual stress are eliminated, and hydrogen tail gas discharged in the annealing process is collected through a main pipeline;
2) step two, the collected hood type withdrawal furnace tail gas firstly passes through a cooler to be cooled to the temperature close to the normal temperature, and then enters a primary processor to remove oil substances, emulsifying agents, solid particles and liquid water in the tail gas; then stabilizing the air pressure through a buffer tank; the gas with stable pressure enters a Roots blower to be pressurized, so that the pressure of the gas is increased to 0.01-0.03 MPa; then the gas enters the buffer tank again to stabilize the gas pressure; secondly, removing oil substances, emulsifying agents, solid particles and liquid water impurities for the second time through a secondary processor; secondly, pressurizing by a hydrogen compressor for the second time, and increasing the pressure to 0.5-0.8 MPa; then the gas enters a gas purification device for purification, and the oxygen molecules in the gas react with the hydrogen molecules to generate water under the action of a deoxygenation catalyst through a catalytic deoxygenator; then the temperature of the gas is reduced to normal temperature through a water cooler, and finally the gas enters a pressure swing adsorption separation system to separate macromolecular gases such as nitrogen, carbon dioxide and the like remained in the gas from the hydrogen to obtain the hydrogen with the purity of 99.999 percent, the dew point of below 65 ℃ below zero and the oxygen content of below 5 ppm;
3) thirdly, the hydrogen is sent to a hydrogen supply pipeline in front of the furnace through a flowmeter and a pressure regulating and stabilizing valve, is converged with the hydrogen supplied by an external network energy pipeline, and enters the bell-type furnace through the hydrogen supply pipeline for recycling, so that the hydrogen is recycled;
4) and step four, carrying out flattening treatment on the annealed steel coil by using the elongation of 1.1%, and cleaning the surface of the steel coil by using flattening liquid with the concentration of 3-5% to obtain an oil drum plate product with a high surface.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116631A (en) * | 1992-10-01 | 1994-04-26 | Nippon Steel Corp | Method for annealing steel sheet |
| JP2001064731A (en) * | 1999-08-25 | 2001-03-13 | Nkk Corp | Method for annealing steel sheet coil in bell type batch annealing furnace |
| KR101033401B1 (en) * | 2011-01-04 | 2011-05-09 | 현대하이스코 주식회사 | Heat treating method for comercial quality steel sheet using batch annealing furnace |
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| CN104213024A (en) * | 2014-09-10 | 2014-12-17 | 河北钢铁股份有限公司唐山分公司 | Ultra-low carbon high-strength steel produced by cover annealing and production method thereof |
| CN106139890A (en) * | 2015-04-01 | 2016-11-23 | 大连中鼎化学有限公司 | Cold-rolled steel sheet heat treatment nitrogen hydrogen mixed tail gas reclaims the apparatus and method purifying |
| CN107419073A (en) * | 2017-08-29 | 2017-12-01 | 鞍钢集团工程技术有限公司 | A kind of cold rolled annealed Full Hydrogen Bell Type Annealing Furnace hydrogen recovery process and system |
| CN111575451A (en) * | 2020-04-28 | 2020-08-25 | 江油市瑞隆精密材料有限公司 | Cold-rolled strip steel continuous annealing process with energy-saving effect |
| CN113430339A (en) * | 2021-06-04 | 2021-09-24 | 唐山钢铁集团有限责任公司 | Control method of protective atmosphere of bell-type annealing furnace |
| CN113637832A (en) * | 2021-08-13 | 2021-11-12 | 新疆八一钢铁股份有限公司 | Production method of SPCC-W black skin steel plate |
| CN113832403A (en) * | 2021-09-25 | 2021-12-24 | 新疆八一钢铁股份有限公司 | Cover annealing method for low-carbon door plate steel |
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| CN103305680A (en) * | 2013-06-08 | 2013-09-18 | 首钢总公司 | Method for producing cold-rolled sheet by means of cover annealing blowing |
| CN103757183A (en) * | 2013-12-11 | 2014-04-30 | 宝钢集团新疆八一钢铁有限公司 | Production process for improving cold rolling commercial coil black stripe defect |
| CN103990649A (en) * | 2014-06-05 | 2014-08-20 | 济钢集团有限公司 | Method for producing cold-rolled strip for fire distinguisher |
| CN104087735A (en) * | 2014-07-15 | 2014-10-08 | 唐山渤海钢铁有限公司 | Annealing process for hot rolled steel plate produced by thin slab casting and rolling technology |
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| CN106139890A (en) * | 2015-04-01 | 2016-11-23 | 大连中鼎化学有限公司 | Cold-rolled steel sheet heat treatment nitrogen hydrogen mixed tail gas reclaims the apparatus and method purifying |
| CN107419073A (en) * | 2017-08-29 | 2017-12-01 | 鞍钢集团工程技术有限公司 | A kind of cold rolled annealed Full Hydrogen Bell Type Annealing Furnace hydrogen recovery process and system |
| CN111575451A (en) * | 2020-04-28 | 2020-08-25 | 江油市瑞隆精密材料有限公司 | Cold-rolled strip steel continuous annealing process with energy-saving effect |
| CN113430339A (en) * | 2021-06-04 | 2021-09-24 | 唐山钢铁集团有限责任公司 | Control method of protective atmosphere of bell-type annealing furnace |
| CN113637832A (en) * | 2021-08-13 | 2021-11-12 | 新疆八一钢铁股份有限公司 | Production method of SPCC-W black skin steel plate |
| CN113832403A (en) * | 2021-09-25 | 2021-12-24 | 新疆八一钢铁股份有限公司 | Cover annealing method for low-carbon door plate steel |
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