CN1029486C - Aluminizing coating process for oxygen lance - Google Patents
Aluminizing coating process for oxygen lance Download PDFInfo
- Publication number
- CN1029486C CN1029486C CN 90102203 CN90102203A CN1029486C CN 1029486 C CN1029486 C CN 1029486C CN 90102203 CN90102203 CN 90102203 CN 90102203 A CN90102203 A CN 90102203A CN 1029486 C CN1029486 C CN 1029486C
- Authority
- CN
- China
- Prior art keywords
- coating
- oxygen lance
- steel
- pipe
- oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 26
- 239000001301 oxygen Substances 0.000 title claims abstract description 26
- 238000005269 aluminizing Methods 0.000 title claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000009792 diffusion process Methods 0.000 claims abstract description 11
- 238000000137 annealing Methods 0.000 claims abstract description 10
- 238000005554 pickling Methods 0.000 claims abstract description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 8
- 238000007747 plating Methods 0.000 claims abstract description 8
- 238000007598 dipping method Methods 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract 3
- 238000005516 engineering process Methods 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000012046 mixed solvent Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 238000007669 thermal treatment Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002468 ceramisation Methods 0.000 abstract 1
- 238000005238 degreasing Methods 0.000 abstract 1
- 238000009628 steelmaking Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 206010023126 Jaundice Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000000274 aluminium melt Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Landscapes
- Coating With Molten Metal (AREA)
Abstract
A heat treatment process for oxygen lance used in steel-smelting is characterized by that the oxygen lance is treated through conventional degreasing, pickling, washing with water, plating aid, baking, hot dipping in molten aluminium, diffusion annealing for aluminizing to obtain aluminized layer with thickness greater than 0.2 mm, gas test, turning, washing with phosphoric acid, coating and ceramization, and its coating has special formula. The aluminized coating oxygen lance treated by the process has the advantages of greatly improving the high temperature resistance and corrosion resistance, ensuring firm coating and difficult falling off, effectively prolonging the service life of the oxygen lance, saving steel, saving the time for replacing the lance, improving the oxygen blowing efficiency and reducing the labor intensity of workers.
Description
A kind of thermal treatment process of using oxygen lance of making steel, particularly to oxygen lance except that conventional oil removing, pickling, wash, help plating, oven dry, the hot dipping, also to carry out special diffusion annealing, to reach certain thickness aluminized coating, gas testing then, car silk, phosphoric acid are washed, carry out coating and porcelainization again, this technology can improve the corrosion-and high-temp-resistant performance of oxygen lance.
Steelmaking oxygen blowing tube generally adopts light pipe and is coated with the mud pipe both at home and abroad at present.Light pipe oxygen blast efficient is low, and replace tubes is frequent, and the consumption of oxygen lance is 3.2～3.4 kilograms of/ton steel.Being coated with the mud pipe is the refractory cements that is coated with 10～15 millimeters of last layers on light pipe, makes the consumption of oxygen lance drop to 1.8～2.6 kilograms of/ton steel, but because of oxygen lance weight increases, has strengthened working strength of workers, and influenced the smelting quality of special steel.
By detailed search patent documentation both domestic and external, only find HOII P NL7607944(same Patent JP53012736), this patent has been introduced the aluminium diffusion layer of ferrous metal, and is all different with the application of aluminizing coating process of the present invention and this technology.
The objective of the invention is in order to overcome the shortcoming that the steelmaking oxygen blowing tube of using at present adopts light pipe and is coated with the mud pipe both at home and abroad, calorized coating is implemented on surface at oxygen lance, improve the corrosion-and high-temp-resistant performance of oxygen lance metal, thereby improve the utilization ratio of oxygen lance, reduce steel consumption.
Steel-making of the present invention uses the low-pressure fluid that meets GB3092-82 or YB242-63 standard to carry Welded Steel Pipe or Electric Welded Steel Pipe with oxygen lance.Ready raw material steel pipe often has greasy filth in the surface, needs shove charge heating oil removing, and Heating temperature is 300 ° ± 50 ℃, and insulation is come out of the stove half an hour.Pickling at room temperature then, the pickling time was generally 15 minutes, note pickling quality, prevented to owe acid or overpickling.After the pickling with 8～10 kilograms per centimeter
2The water of pressure flushing steel pipe will be cleaned and control dried, keeps washing the part cleaning, in order to avoid the surface jaundice is got rusty.Steel pipe after the pickling helps plating in liquor zinci chloridi, solution is formulated as and adds 4～5 kilograms of zinc in per ton 33% hydrochloric acid, and helping the plating time is 4～6 minutes.Help the oven dry of plating back, Temperature Control of Drying Oven must not help coating in burned surface at 250 ℃, and the steel pipe after the oven dry is put into 92～94% commercial-purity aluminium melt hot dipping, and the temperature of aluminum liquid in the iron core line frequency furnace is controlled at 770 ° ± 20 ℃ scopes.Carry out aluminising diffusion annealing then, will in aluminium liquid, put into the diffusion annealing stove by the steel pipe after the hot dipping, slowly evenly be warming up to 910 ° ± 50 ℃, be incubated 4～6 hours from room temperature, when cooling to the furnace below 600 ℃ then, the air cooling of coming out of the stove again.After aluminising diffusion annealing.The aluminized coating thickness of steel pipe is answered 〉=0.2 millimeter.These pipes carry out aeration test at Che Siqian by root, and ventilation air pressure is 6 kilograms per centimeter
2, car silk then.Will carry out phosphoric acid and wash before coating, phosphoric acid concentration is 10%, 15～20 minutes pickling time.Pipe after phosphoric acid is washed is wanted coating, and coating process is for to be mixed with coating with high-temperature refractory and caking agent, and is even in the outer tube surface brushing with coating machine or hairbrush, evenly sprays with internal spraying machine at internal surface, and coat-thickness is 0.3～0.5 millimeter.The prescription of coating slip is SiO
265～90 grams, TiO
215～25 grams, 50～60 milliliters of PAC mixed solvents, wherein the composition of PAC mixed solvent is Al(H
2PO
4) 20～24%, CrO
32～3%, H
2O73～78%.Aluminizing pipe after the coating is put into the roaster porcelainization, and the porcelain temperature is 420 ° ± 20 ℃, and the porcelain time is 6～9 hours, treats that coating reaches the porcelain state and can come out of the stove.
Oxygen lance aluminizing coating process of the present invention makes treated steel pipe improve high temperature resistant, corrosion resistance nature greatly, the light pipe that uses and be coated with mud Guan Eryan relatively both at home and abroad at present, its loss rate is slow, it is light that weight is coated with the mud pipe, coating is firm, difficult drop-off in the work-ing life of having improved oxygen lance effectively, has been saved steel.Aluminized and Coated Oxygen Blast Pipe can improve 7～10 times of life-spans than light pipe, can improve 4～6 times of life-spans than being coated with the mud pipe, therefore can save the replace tubes time when steel-making, improves oxygen blast efficient, alleviates labor strength.
Fig. 1 is the aluminising diffusion annealing graphic representation of this technology.
Embodiment:
Electric Welded Steel Pipe is handled by following technology:
Raw material preparation → oil removing → pickling (room temperature, 28～33%HCl) → wash → help plating (one ton of 4～5 kilograms of zinc/33%HCl, plating 4～6 minutes) → oven dry (250 ℃) → hot dipping (770 ℃ ± 20 ℃) → aluminising diffusion annealing → gas testing (air pressure 6 kilograms per centimeter
2) → car silk → phosphoric acid is washed (10% phosphoric acid, washed 15～20 minutes) → coating → porcelainization (400 ℃) → check → packing → warehouse-in.
Wherein aluminising diffusion annealing curve as shown in Figure 1.
When being used for Electric furnace steel making and producing by the oxygen lance of above-mentioned art breading, it is high temperature resistant, corrosion resistance nature improves greatly, and light pipe, the consumption per ton of steel that is coated with the mud pipe descend greatly relatively, and it relatively can see the following form:
3.2～3.4 kilograms of/ton steel of light pipe
Be coated with 1.8～2.6 kilograms of/ton steel of mud pipe
0.8～1.2 kilogram of/ton steel of aluminizing pipe
0.29～0.285 kilogram of/ton steel of calorized coating pipe
Claims (2)
1, a kind of thermal treatment process of using oxygen lance of making steel, after oil removing, pickling, washing, help plating, oven dry, the hot dipping of aluminium liquid, also to carry out aluminising diffusion annealing, reach aluminized coating thickness 〉=0.2 millimeter, gas testing then, car silk, phosphoric acid are washed, carry out coating and porcelainization again, the prescription that it is characterized in that the coating slip is SiO
265～95 grams, TiO
215～25 grams, 50～60 milliliters of PAC mixed solvents, wherein the composition of PAC mixture is Al (H
2PO
4) 20～24%, CrO
32～3%, H
2O73～78%, coat-thickness are 0.3～0.5 millimeter, and the aluminizing pipe after the coating is put into the roaster porcelainization, and the porcelain temperature is 420 ° ± 20 ℃, and the porcelain time is 6～9 hours, treat that coating reaches the porcelain state and can come out of the stove.
2, technology according to claim 1, it is characterized in that described aluminising diffusion annealing process will be for will slowly evenly being warming up to 910 ° ± 50 ℃ from room temperature by the steel pipe after the hot dipping in aluminium liquid, be incubated 4～6 hours, when cooling to the furnace below 600 ℃ then, the air cooling of coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102203 CN1029486C (en) | 1990-04-21 | 1990-04-21 | Aluminizing coating process for oxygen lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102203 CN1029486C (en) | 1990-04-21 | 1990-04-21 | Aluminizing coating process for oxygen lance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055956A CN1055956A (en) | 1991-11-06 |
| CN1029486C true CN1029486C (en) | 1995-08-09 |
Family
ID=4877417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90102203 Expired - Fee Related CN1029486C (en) | 1990-04-21 | 1990-04-21 | Aluminizing coating process for oxygen lance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029486C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293228C (en) * | 2004-07-30 | 2007-01-03 | 大连交通大学 | Method for obtaining calorization layer on steel pipe inner surface using elecric contact heating method |
| CN104561873B (en) * | 2014-12-31 | 2017-09-12 | 南京工程学院 | One kind is based on surface preparation carbon steel hot aluminizing technique |
| CN111101093A (en) * | 2018-10-29 | 2020-05-05 | 兴化市中科渗铝钢管有限公司 | Efficient aluminizing processing method |
| CN111101092A (en) * | 2018-10-29 | 2020-05-05 | 兴化市中科渗铝钢管有限公司 | Novel efficient and stable hot aluminizing processing method |
-
1990
- 1990-04-21 CN CN 90102203 patent/CN1029486C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055956A (en) | 1991-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110284070B (en) | 260 MPa-level hot-rolled acid-washed enamel steel and production method thereof | |
| CN108265252B (en) | Environment-friendly hot-dip coating method | |
| CN1029486C (en) | Aluminizing coating process for oxygen lance | |
| JPH0261543B2 (en) | ||
| CN109652789B (en) | Method for treating surface of inner wall of boiler | |
| CN102383082A (en) | Method for prolonging service life of reducing distillation furnace | |
| CN211420051U (en) | Energy-saving coke oven top | |
| CN1047347A (en) | Hot dipping calorization process for low-carbon steel | |
| CN208151462U (en) | A kind of efficient apparatus for hot-dip of fume afterheat cascade utilization | |
| CN101334238A (en) | Undersintering baking method for intermittent type operating intermediate frequency furnace quartz crucible | |
| BR0012961A (en) | Process and installation for hot dip galvanizing of hot rolled steel strips | |
| CN1038518C (en) | Submerged-arc scum for steel chamber refinery furnace | |
| CN108034802A (en) | The heat treatment method and its production equipment of a kind of steel wire | |
| JPS5844133B2 (en) | Continuous annealing method for cold rolled steel strip | |
| CN209024621U (en) | Degreasing unit is used in a kind of metal aluminising production | |
| CN85106684B (en) | Hot-dip aluminizing-low-temperature graphitization process for malleable cast iron of ferrite | |
| CN206351334U (en) | A kind of manufacture system of compound titanium plate | |
| CN110724539A (en) | An energy-saving coke oven roof | |
| RU2001133759A (en) | The method of preparation for the operation of the lance of the blast furnace | |
| CN219390461U (en) | Direct reduction rotary kiln back air supply device | |
| CN217236471U (en) | Esse furnace reaction zone conical section curved surface cast copper water jacket | |
| CN117488008B (en) | Low-energy-consumption baking method for dip tube for RH production of aluminum killed steel | |
| CN115216777B (en) | Surface iron removal process of carbon steel crucible for magnesium alloy smelting | |
| CN116536486A (en) | Energy-saving hood-type annealing furnace system and use method thereof | |
| CN213295469U (en) | Steel plate hot-dipping zinc plating pot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |