CN106987759B - A kind of corrosion-resistant screw-thread steel smelting process containing rare earth element - Google Patents
A kind of corrosion-resistant screw-thread steel smelting process containing rare earth element Download PDFInfo
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- CN106987759B CN106987759B CN201710196196.XA CN201710196196A CN106987759B CN 106987759 B CN106987759 B CN 106987759B CN 201710196196 A CN201710196196 A CN 201710196196A CN 106987759 B CN106987759 B CN 106987759B
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 100
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 93
- 239000010959 steel Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005260 corrosion Methods 0.000 title claims abstract description 27
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 238000003723 Smelting Methods 0.000 title claims abstract description 14
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000005266 casting Methods 0.000 claims abstract description 12
- 238000004090 dissolution Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 13
- 238000005275 alloying Methods 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 8
- 238000010891 electric arc Methods 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 239000000320 mechanical mixture Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001788 irregular Effects 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 8
- -1 rare earth compound Chemical class 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000006104 solid solution Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 3
- 238000000265 homogenisation Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000011572 manganese Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 108010038629 Molybdoferredoxin Proteins 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-IGMARMGPSA-N vanadium-51 Chemical compound [51V] LEONUFNNVUYDNQ-IGMARMGPSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of anti-corrosion spiral smelting process containing rare earth element provided by the invention, rare earth pulvis is mixed with iron powder, briquetting and sintering form rare earth block materials, rare earth pulvis is firmly wrapped in iron powder, it is added into molten steel before molten steel casting, the dissolution of completion rare earth pulvis during tundish flows into crystallizer again is flowed by ladle in molten steel, homogenization, reduce the reaction time of rare earth pulvis and molten steel, reduce the total amount of rare earth compound, the rare earth pulvis for not being in time for reaction after dissolving simultaneously is directly solid-solubilized in steel matrix, increase the recovery rate of solid solution state rare earth element, improve the corrosion resistance of steel matrix.
Description
Technical field
The present invention relates to field of steel metallurgy more particularly to a kind of corrosion-resistant screw-thread steel smelting processes containing rare earth element.
Background technique
Screw-thread steel is important construction material, is widely used in the construction of the civil engineerings such as house, bridge, road, is modern
One of core material of building.Currently, steel bar corrosion is one of the principal element for influencing reinforced concrete structure durability, and
Important Project premature failure and the major reason for exiting military service in advance, especially in the specific environments such as ocean and dynamic load and static load more
Under the coupling of factor, steel bar corrosion will be caused to aggravate, therefore, since the 1950s, foreign countries start to carry out
The research of corrosion-resistant screw-thread steel, core concept are by the way that Cr, Ni, Cu, P, Mo, Sn, Ti, Nb, W, V, Re etc. are added in steel
Alloying element makes steel generate fine and close interior rusty scale, reduces corrosion rate, so that the corrosion resistance of reinforcing bar itself is improved, it is open
Number grinding for this respect is described for the patent of invention and the patent of invention of Publication No. CN104372246A of CN104018091A
Study carefully work.
For alloying element most in anti-corrosion spiral, can directly add in the case where molten steel abundant deoxidation
Enter, recovery rate is higher, but this process is then much more complex for rare earth element therein.The corrosion proof rare earth element of steel is influenced to exist
To be dissolved state presence in steel, the polarization resistance and corrosion potential of steel matrix can be improved, therefore can be improved steel matrix
Corrosion resistance, but not all rare earth element into molten steel is to be dissolved state presence.Due to general screw thread steel smelting using Si,
Mn deoxidization technique, and the affinity of rare earth element and oxygen is significantly larger than Si, Mn, thus rare earth element enter molten steel after can be further
It is reacted with the oxygen in molten steel；Meanwhile the sulfur content in general screw-thread steel and balances each other 0.01% or so with rare earth element at present
Molten steel sulfur content 0.0050% hereinafter, therefore rare earth element enter after molten steel can also further with the reaction of Salmon-Saxl in molten steel；
In addition, rare earth element can also carry out denaturation treatment to the field trash in molten steel.Taken together, rare earth element enters head after molten steel
It can first be chemically reacted with oxygen, sulphur, the field trash in molten steel, generate rare earth oxide, rare-earth sulfide and rare earth oxygen sulphur
Compound, remaining rare earth element just exist with solution.
The fusing point and density of 1 rare earth compound of table
These rare earth compound fusing points are higher, and density and molten steel are close, are difficult to exclude from molten steel, on the one hand will affect steel
The cleanliness of water will cause continuous casting sprue and store stream, while can also reduce rare earth element recovery rate when serious, finally influence screw-thread steel
Mechanical property and corrosion resisting property.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of corrosion-resistant screw thread steel smelting containing rare earth element
Method reduces the reaction time of rare earth pulvis and molten steel, reduces the total amount of rare earth compound, does not have enough time reacting after can making dissolution
Rare earth pulvis be directly solid-solubilized in steel matrix, increase solid solution state rare earth element recovery rate, improve the corrosion-resistant of steel matrix
Ability.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of corrosion-resistant screw-thread steel smelting process containing rare earth element, the specific method is as follows:
1) rare earth pulvis and iron powder the preparation of rare earth block materials: are subjected to mechanical mixture, mixing using rotary drum mixer
Mass percentage shared by rare earth pulvis is 5%-20% afterwards, and the pulvis surface after mixing is without apparent rare earth powder particles；
Pulvis after mixing is subjected to briquetting and sintering processes form rare earth block materials, after sintering, rare earth pulvis is firmly wrapped
It is rolled in inside iron powder, and rare earth block materials have certain intensity and specific gravity；
2) electric arc furnaces melting waste steel is utilized, ferrosilicon and manganeisen is added into molten steel after steel scrap is completely melt to molten steel
Deoxidation treatment is carried out, guarantees molten steel dissolved oxygen content less than 0.0040%, deoxygenated alloy is added as requested after 5-10min is added
Various alloying elements in addition to rare earth element, make alloying element sufficiently, uniform dissolution is into molten steel；
3) rare earth block materials are added in sky ladle and are tapped into ladle, guarantee that the tapping process molten steel band quantity of slag is small
In 5kg/t steel, hereafter start to cast, casting process uses protective casting, and molten steel flows into crystallizer through tundish, is formed
The square billet met the requirements；
The granularity of the rare earth pulvis and iron powder is not greater than 0.5mm.
The briquetting processing of the rare earth block materials uses universal press, and the mixing powder after briquetting has rule outer
Shape.
The sintering processes of the rare earth block materials carry out under hydrogen shield hot conditions, 1100 DEG C of sintering temperature-
1300 DEG C, sintering time 20-30min.
Above-mentioned steps 2) in into molten steel be added deoxidier when liquid steel temperature be not less than 1600 DEG C.
Above-mentioned steps 2) in tapping terminate to casting start time interval be not more than 10min.
Compared with prior art, the beneficial effects of the present invention are:
In anti-corrosion spiral smelting process of the tradition containing rare earth element, rare earth element generally is completed in ladle refining process
And the alloying process of other alloying elements, it is further anti-with the elements such as oxygen, sulphur in molten steel that it is bound to cause rare earth element in this way
It answers, forms dystectic rare earth compound, not only influence the cleanliness of molten steel, solid solution state rare earth content can be also reduced, to reduce
The mechanical property and corrosion resistance of spiral.A kind of anti-corrosion spiral smelting side containing rare earth element provided by the invention
Method, rare earth pulvis is mixed with iron powder, briquetting and sintering form rare earth block materials, rare earth pulvis is firmly wrapped in iron powder
In, it is added into molten steel before molten steel casting, it is complete during molten steel flows into crystallizer again by ladle inflow tundish
At the dissolution of rare earth pulvis, homogenization, the reaction time of rare earth pulvis and molten steel is reduced, the total of rare earth compound is reduced
Amount, while the rare earth pulvis for not being in time for reaction after dissolving directly is solid-solubilized in steel matrix, increases solid solution state rare earth element
Recovery rate improves the corrosion resistance of steel matrix.
Detailed description of the invention
Fig. 1 is that common process and rare earth of the present invention are mingled with morphological contrast map.
In figure: (a) being common process, be (b) present invention.
Specific embodiment
Embodiments of the present invention are further illustrated with reference to the accompanying drawing:
A kind of corrosion-resistant screw-thread steel smelting process containing rare earth element, the specific method is as follows:
1) rare earth pulvis and iron powder the preparation of rare earth block materials: are subjected to mechanical mixture, mixing using rotary drum mixer
Mass percentage shared by rare earth pulvis is 5%-20% afterwards, and the pulvis surface after mixing is without apparent rare earth powder particles；
Pulvis after mixing is subjected to briquetting and sintering processes form rare earth block materials, after sintering, rare earth pulvis is firmly wrapped
It is rolled in inside iron powder, and rare earth block materials have certain intensity and specific gravity；
2) electric arc furnaces melting waste steel is utilized, ferrosilicon and manganeisen is added into molten steel after steel scrap is completely melt to molten steel
Deoxidation treatment is carried out, guarantees molten steel dissolved oxygen content less than 0.0040%, deoxygenated alloy is added as requested after 5-10min is added
Various alloying elements in addition to rare earth element, make alloying element sufficiently, uniform dissolution is into molten steel；
3) rare earth block materials are added in sky ladle and are tapped into ladle, guarantee that the tapping process molten steel band quantity of slag is small
In 5kg/t steel, hereafter start to cast, casting process uses protective casting, and molten steel flows into crystallizer through tundish, is formed
The square billet met the requirements；
The granularity of the rare earth pulvis and iron powder is not greater than 0.5mm.
The briquetting processing of the rare earth block materials uses universal press, and the mixing powder after briquetting has rule outer
Shape.
The sintering processes of the rare earth block materials carry out under hydrogen shield hot conditions, 1100 DEG C of sintering temperature-
1300 DEG C, sintering time 20-30min.
Above-mentioned steps 2) in into molten steel be added deoxidier when liquid steel temperature be not less than 1600 DEG C.
Above-mentioned steps 2) in tapping terminate to casting start time interval be not more than 10min.
Embodiment 1:
The chemical component of spiral such as table 2:
2 screw thread composition of steel of table, %
| C | Si | Mn | P | S | Cr | Mo | V | Re |
| 0.03 | 0.5 | 2.3 | <0.01 | <0.01 | 8.5 | 2.2 | 0.04 | 0.02 |
Specific steps:
1) granularity the preparation of rare earth block material: is less than to the rare earth powder and atomized iron powder of 0.5mm using rotary drum mixer
It is mixed, full dose content of rare earth is 98% in rare earth pulvis, and wherein Ce content is 97.32%, La content 0.28%, remaining is
Impurity.Iron content is 99% in iron powder, remaining is impurity.The mass percentage of rare earth pulvis is 15% after mixing.Utilize ten thousand
Energy press machine carries out briquetting to mixing powder, is then sintered in hydrogen shield high temperature sintering furnace, sintering temperature
1200 DEG C, sintering time 25min.Form rare earth block materials.
2) melt 7t steel scrap using electric arc furnaces, carbon content is less than 0.0050%, phosphorus content less than 0.0080%, sulphur in steel scrap
Content is less than 0.0060%.Steel scrap is warming up to 1610 DEG C after being completely melt, be subsequently to added into 220kg low-carbon ferromanganese (manganese content 80%,
Carbon content 0.2%, remaining is impurity) and 50kg ferrosilicon (silicone content 76%, remaining is impurity) to molten steel carry out deoxidation, after deoxidation
Molten steel dissolved oxygen content is 0.0021%, and (chromium content 65%, carbon contain addition 963kg low-carbon ferrochromium after 7min is added in deoxygenated alloy
Amount 0.2%, remaining is impurity), 255kg molybdenum-iron (molybdenum content 62%, remaining be impurity), 5.7kg vanadium iron (content of vanadium 51%, its
Remaining is impurity).
3) 11.2kg rare earth block materials are added in empty ladle, go out when the liquid steel temperature in electric arc furnaces is 1590 DEG C
Steel, tapping process molten steel band quantity of slag 30kg, tapping start to carry out molten steel casting after terminating 5min, are cast into symbol through billet caster
Close desired slab.
Compared with common process (being directly added into rare earth alloy in electric arc furnaces), Cleanliness of Molten Steel significantly improves this technique,
Rare earth in slab is mingled with using scanning electron microscope and is analyzed, large particle rare-earth, which is mingled with, in this technique significantly reduces, specific such as Fig. 1
It is shown.This technique rare earth element recovery rate is also highly improved and (is shown in Table 3) simultaneously, and solid solution state rare earth content is higher.
3 common process of table and rare earth element recovery rate of the present invention compare
Claims (4)
1. a kind of corrosion-resistant screw-thread steel smelting process containing rare earth element, which is characterized in that the specific method is as follows:
1) preparation of rare earth block materials: carrying out mechanical mixture for rare earth pulvis and iron powder using rotary drum mixer, dilute after mixing
Mass percentage shared by native pulvis is 5%-20%, and the pulvis surface after mixing is without apparent rare earth powder particles；It will mix
Pulvis after even carries out briquetting and sintering processes form rare earth block materials, and after sintering, rare earth pulvis is firmly wrapped in
Inside iron powder, and rare earth block materials have certain intensity and specific gravity；
2) electric arc furnaces melting waste steel is utilized, ferrosilicon and manganeisen is added into molten steel after steel scrap is completely melt, molten steel is carried out
Deoxidation treatment guarantees molten steel dissolved oxygen content less than 0.0040%, and deoxygenated alloy, which is added after 5-10min, to be added as requested except dilute
Various alloying elements other than earth elements, make alloying element sufficiently, uniform dissolution is into molten steel；
3) rare earth block materials are added in sky ladle and are tapped into ladle, guarantee that the tapping process molten steel band quantity of slag is less than
Hereafter 5kg/t steel starts to cast, casting process uses protective casting, and molten steel flows into crystallizer through tundish, is formed full
The square billet required enough；
Above-mentioned steps 2) in tapping terminate to casting start time interval be not more than 10min；
The granularity of the rare earth pulvis and iron powder is not greater than 0.5mm.
2. a kind of anti-corrosion spiral smelting process containing rare earth element according to claim 1, it is characterised in that: described
The briquetting processing of rare earth block materials use universal press, the mixing powder after briquetting has irregular figure.
3. a kind of anti-corrosion spiral smelting process containing rare earth element according to claim 1, it is characterised in that: described
The sintering processes of rare earth block materials carried out under hydrogen shield hot conditions, 1100 DEG C -1300 DEG C of sintering temperature, when sintering
Between 20-30min.
4. a kind of anti-corrosion spiral smelting process containing rare earth element according to claim 1, it is characterised in that: above-mentioned
Liquid steel temperature is not less than 1600 DEG C when deoxidier is added in step 2) into molten steel.
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| CN114297889B (en) * | 2021-12-16 | 2024-05-24 | 武汉科技大学 | Multi-field coupling analysis method for novel steel ladle |
| CN114908207A (en) * | 2022-04-18 | 2022-08-16 | 包头钢铁（集团）有限责任公司 | Method for improving rare earth yield by controlling sulfur content of molten steel |
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| CN103160651A (en) * | 2013-03-04 | 2013-06-19 | 内蒙古包钢钢联股份有限公司 | Rare-earth adding method of vacuum induction furnace smelting experimental steel |
| CN103820740A (en) * | 2014-02-28 | 2014-05-28 | 南车戚墅堰机车车辆工艺研究所有限公司 | Ferrite heatproof cast steel, preparation method thereof and applications thereof |
| CN103820739A (en) * | 2014-02-28 | 2014-05-28 | 南车戚墅堰机车车辆工艺研究所有限公司 | Ferrite heat-resisting cast steel, preparation method thereof and applications thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160651A (en) * | 2013-03-04 | 2013-06-19 | 内蒙古包钢钢联股份有限公司 | Rare-earth adding method of vacuum induction furnace smelting experimental steel |
| CN103820740A (en) * | 2014-02-28 | 2014-05-28 | 南车戚墅堰机车车辆工艺研究所有限公司 | Ferrite heatproof cast steel, preparation method thereof and applications thereof |
| CN103820739A (en) * | 2014-02-28 | 2014-05-28 | 南车戚墅堰机车车辆工艺研究所有限公司 | Ferrite heat-resisting cast steel, preparation method thereof and applications thereof |
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| CN106987759A (en) | 2017-07-28 |
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