CN109487148A - A method of utilizing waste and old steel melting water heating pipe fittings molten iron - Google Patents
A method of utilizing waste and old steel melting water heating pipe fittings molten iron Download PDFInfo
- Publication number
- CN109487148A CN109487148A CN201811412439.XA CN201811412439A CN109487148A CN 109487148 A CN109487148 A CN 109487148A CN 201811412439 A CN201811412439 A CN 201811412439A CN 109487148 A CN109487148 A CN 109487148A
- Authority
- CN
- China
- Prior art keywords
- waste
- water heating
- heating pipe
- pipe fittings
- old steel
- 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.)
- Pending
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 110
- 239000010959 steel Substances 0.000 title claims abstract description 110
- 239000002699 waste material Substances 0.000 title claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 81
- 238000010438 heat treatment Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000002844 melting Methods 0.000 title claims abstract description 23
- 230000008018 melting Effects 0.000 title claims abstract description 23
- 238000005266 casting Methods 0.000 claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 claims abstract description 43
- 238000004064 recycling Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims description 84
- 238000003723 Smelting Methods 0.000 claims description 15
- 239000003973 paint Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 229910001018 Cast iron Inorganic materials 0.000 abstract description 4
- 239000010439 graphite Substances 0.000 abstract description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 3
- 229910001567 cementite Inorganic materials 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910001562 pearlite Inorganic materials 0.000 abstract description 2
- 239000012459 cleaning agent Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000010819 recyclable waste Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- ICLYJLBTOGPLMC-KVVVOXFISA-N (z)-octadec-9-enoate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCC\C=C/CCCCCCCC(O)=O ICLYJLBTOGPLMC-KVVVOXFISA-N 0.000 description 1
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- XOCUXOWLYLLJLV-UHFFFAOYSA-N [O].[S] Chemical compound [O].[S] XOCUXOWLYLLJLV-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007600 charging Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- VAKIVKMUBMZANL-UHFFFAOYSA-N iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000000787 lecithin Substances 0.000 description 1
- 235000010445 lecithin Nutrition 0.000 description 1
- 229940067606 lecithin Drugs 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229940117013 triethanolamine oleate Drugs 0.000 description 1
- 229960004418 trolamine Drugs 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
- C22C33/08—Making cast-iron alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
- C21C1/105—Nodularising additive agents
-
- 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
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/088—Iron or steel solutions containing organic acids
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention provides a kind of methods using waste and old steel melting water heating pipe fittings molten iron, it is characterized by comprising carry out category filter to waste and old steel, it is described that the waste and old steel of recycling are distinguished by label according to classification standard, the waste and old steel in the part of label are handled, it is allowed to meet the production requirement of water heating pipe fittings molten casting iron, the waste and old steel melting that the production requirement of water heating pipe fittings molten casting iron will be met is original iron melt, under the premise of the water heating pipe fittings foundry cast iron water takes reasonable carbon equivalent, appropriateness, which improves Si/C, makes processing performance be greatly improved, mechanics pulling experiment, tensile strength: 500--550Mpa, yield strength 400-410Mpa, elongation percentage 15-20%, metallographic reaches entirely: size of graphite ball is 7 grades, 2-3 grades of nodularization, pearlite 5-20%, cementite is zero.
Description
Technical field
The present invention relates to the technical fields of water heating pipe fittings casting.
Specifically, be related to it is a kind of using recycling waste and old steel prepare water heating pipe fittings cast used in molten iron.
Background technique
Casting is that the mankind grasp than a kind of metal heat processing technique earlier, has history in about 6000.China about exists
B.C. 1700 ~ it is 1000 first between entered heyday of bronze casting, have reached quite high level in technique.Casting is
Liquid metals is cast in the casting cavity being adapted with part shape, after its cooled and solidified, to obtain part or blank
Method.It was mostly originally solid-state but the metal (example: copper, iron, aluminium, tin, lead etc.) for being heated to liquid by casting material matter, and mold
Material can be sand, metal even ceramics.In response to different requirements, the method used be would also vary from.
Water heating pipe fittings requirement anti-pressure ability is strong, is unlikely to deform the features such as long service life, good seal performance, one-pass molding,
Water heating pipe fittings made of casting just can satisfy above-mentioned requirements, so casting is the production method of water heating pipe fittings, casting always
Raw material be iron, steel and part metals or additive, by corresponding process melting after carry out cast molding.With iron
The development and utilization of the resources such as ore, good iron ore resource are reduced year by year, then iron price on the market is growing day by day, directly
It is gradually increased using the cost of iron production water heating pipe fittings.
The cost of material such as non-ferrous metal persistently rise, and manufacturing enterprise manages and gradually becomes better, and buying regenerated resources quantity is more past
Year occur increasing by a relatively large margin, in addition supply side structural reform deepens continuously, removes " bar steel " comprehensively, goes the policies such as production capacity
Factor superposition, has pushed regenerated resources to relaunch.Recycling of recyclable waste is frequently active with the marketing using enterprise,
The trend that recycling of recyclable waste amount increasess slowly in recent years changes, and recycling industry gradually walks out benefit depression situation.Meanwhile
As environmentally friendly supervise and examine dynamics persistently increases, some nonstandard regenerated resources enterprises are shut down, and recovery total increases speed-raising, recycling
Total value rises sharply nearly 30%.Therefore, more and more water heating pipe fittings foundry enterprises start to select the waste and old steel of recycling as manufacture hot-water heating
The raw material of pipe fitting, however waste and old steel are suitable for the casting of water heating pipe fittings after not all recycling, after partially recycled
The Foundry Production for needing to can be only used for water heating pipe fittings just now after treatment in.
Summary of the invention
It is an object of the invention to overcome the shortcoming of above-mentioned traditional technology, a kind of utilization wastes of iron and steel structure is provided
Part, is packaged the steel such as material, No. 45 steel at leftover pieces, the method for manufacturing water heating pipe fittings molten casting iron.
The purpose of the present invention is what is reached by following technical measures: a kind of to utilize waste and old steel melting water heating pipe fittings iron
The method of water, it is characterised in that: including carrying out category filter to waste and old steel, it is described according to classification standard by the waste and old steel of recycling
Material distinguishes label, handles the waste and old steel in the part of label, is allowed to meet the production requirement of water heating pipe fittings molten casting iron, will
The waste and old steel melting for meeting the production requirement of water heating pipe fittings molten casting iron is original iron melt.
A kind of improvement as above-mentioned technical proposal: the classification standard is whether to meet the life of water heating pipe fittings molten casting iron
It produces and requires, do not meet the waste and old steel label C class raw material of the production requirement of water heating pipe fittings molten casting iron.
A kind of improvement as above-mentioned technical proposal: described can put into without processing carries out production and processing use in smelting furnace
Steel, marked as A class raw material.It needs to carry out what production and processing used in compound investment smelting furnace after being further processed
Steel are marked as B class raw material.
A kind of improvement as above-mentioned technical proposal: the waste and old steel of the recycling include steel structural part, leftover pieces, beat
The common waste and old steel such as construction materials contract, A3,45# steel.When the waste and old above-mentioned content of steel after the recovery does not meet the content of the element
It is required that when, the waste and old steel, which belong to, may not be usable for waste and old steel required for water heating pipe fittings molten casting iron produces, right
Such waste and old steel after the recovery carry out label and need to sieve above-mentioned C class raw material from waste and old steel material marked as C class raw material
It elects.
A kind of improvement as above-mentioned technical proposal: it is described meet water heating pipe fittings casting institute's steel need to meet its containing C≤
1%, the requirement of Si≤1%, Mn≤0.5%, P≤0.04%.
A kind of improvement as above-mentioned technical proposal: the waste and old steel meet C≤1%, Si≤1%, Mn≤0.5%, P≤
0.04% requirement, but cannot be used directly for water heating pipe fittings molten casting iron and produced, it is therefore desirable to again to above-mentioned waste and old steel
It is secondary to classify.
A kind of improvement as above-mentioned technical proposal: the standard of the subseries again be waste and old steel surface whether there is or not get rusty,
Whether there is or not greasy dirt, surfaces on surface whether there is or not paint, the surface without get rusty, the waste and old steel without greasy dirt, without paint are used directly for
The production of water heating pipe fittings molten casting iron carries out marked as A class raw material such waste and old steel, and the waste and old steel surface has life
Rust, greasy dirt, paint waste and old steel cannot be directly used in the production of water heating pipe fittings molten casting iron, therefore to such waste and old steel
It carries out marked as B class raw material.
A kind of improvement as above-mentioned technical proposal: described that water heating pipe fittings casting cannot be directly used according to B class raw material
The reason of molten iron production, difference classified to B class raw material.Get rusty since B class raw material surface has, this B class raw material its marked as
B1 class raw material, since there is greasy dirt on B class raw material surface, this B class raw material its marked as B2 class raw material, since B class raw material surface has
Paint, this B class raw material its marked as B3 class raw material.
A kind of improvement as above-mentioned technical proposal: it is described that B1 class raw material is cleaned, it is allowed to meet water heating pipe fittings casting
The production requirement of molten iron is made, it is described that B2 class raw material is cleaned, it is allowed to meet the production requirement of water heating pipe fittings molten casting iron, institute
It states and B3 class raw material is cleaned, be allowed to meet the production requirement of water heating pipe fittings molten casting iron.
A kind of improvement as above-mentioned technical proposal: described successively to fill A class raw material with treated above-mentioned B class raw material
Entering melting in smelting furnace is the original iron melt for meeting the production requirement of water heating pipe fittings molten casting iron.
By adopting the above-described technical solution, compared with prior art, the invention has the advantages that water heating pipe fittings casting is used
Under the premise of molten iron takes reasonable carbon equivalent, moderately improving Si/C makes processing performance be greatly improved, mechanics pulling experiment, resists
Tensile strength: 500--550Mpa, yield strength 400-410Mpa, elongation percentage 15-20%, metallographic reach entirely: size of graphite ball 7
Grade, 2-3 grades of nodularization, pearlite 5-20%, cementite zero.
Using the water heating pipe fittings foundry cast iron water cast out come water heating pipe fittings there is no the qualified thin-section casting of iron phosphide eutectic.Casting
Part chemical component: C=3.6%-3.9%, Si=2.6-2.8%, Mn=0.1-0.08%, S=0.017, P=0.04-0.03%.
The elbow series of products of the water heating pipe fittings foundry cast iron water casting and forming improve under the premise of being all made of suitable carbon equivalent
Si/C ratio so that processing performance, mechanical property etc. have important breakthrough gives full play to advantage possessed by ferrite, benefit
With this feature of silicon reinforced ferrite, make tensile strength elongation percentage with higher while 600Mpa or so；In iron element
It is further improved in body solution strengthening, while obtaining the product of stable chemical performance, overcomes synthetic cast iron because of carbon amounts shakiness
A series of problems caused by fixed, and the corresponding relationship of silicon and carbon is had found, single ingredient mode is got rid of, is had more than conventional method
There are flexibility and reliability.
The invention will be further described With reference to embodiment.
Specific embodiment
Embodiment: a method of using waste and old steel melting water heating pipe fittings molten iron, carried out using the waste and old steel of recycling
Molten iron needed for melting obtains water heating pipe fittings casting, needs to carry out following operation.
The category filter of waste and old steel: the first step carries out category filter firstly the need of the waste and old steel that will be recycled, will recycle
Waste and old steel be divided into: (1) can be put into smelting furnace without processing and carry out the steel that use of production and processing, marked as A class raw material.
(2) it needs produce and process the steel used marked as B class raw material in compound investment smelting furnace after being further processed.
(3) it filters out and may not be usable for waste and old steel required for water heating pipe fittings molten casting iron produces marked as C class raw material.
The waste and old steel of the recycling include the common waste and old steel such as steel structural part, leftover pieces, packing material, A3,45# steel
Material, waste and old steel required for production water heating pipe fittings molten casting iron produces, can the ingredient of the steel determines be used to produce
The use of the production and processing of molten iron needed for water heating pipe fittings are cast, the steel for producing molten iron needed for water heating pipe fittings are cast need full
Its requirement containing C≤1%, Si≤1%, Mn≤0.5%, P≤0.04% of foot, when the waste and old above-mentioned content of steel after the recovery does not meet institute
When stating the content requirement of element, the waste and old steel belong to required for may not be usable for the production of water heating pipe fittings molten casting iron
Waste and old steel carry out label to such waste and old steel after the recovery, marked as C class raw material, need above-mentioned C class raw material from waste and old
It is screened in steel material.
When the waste and old above-mentioned content of steel after the recovery meets the content requirement of the element, the waste and old steel category
The waste and old steel required for it can be used for water heating pipe fittings molten casting iron and produce, it is described to can be used for the life of water heating pipe fittings molten casting iron
Waste and old steel required for producing are again because the reasons such as use or storage before it, which cause, several cannot be used directly for hot-water heating pipe
The reason of part molten casting iron is produced, it is therefore desirable to which the waste and old steel for the content requirement for meeting the element are divided again
Class, then subseries standard be waste and old steel surface after the recovery whether there is or not get rusty, surface whether there is or not greasy dirt, surface whether there is or not paint.
The waste and old above-mentioned content of steel after the recovery meets the content requirement of the element, also, surface without get rusty, nothing
Greasy dirt, the waste and old steel without paint are used directly for the production of water heating pipe fittings molten casting iron, mark to such waste and old steel
Number be A class raw material.
The waste and old above-mentioned content of steel after the recovery meets the content requirement of the element, however, after the recovery waste and old
Steel surface have get rusty, the waste and old steel of greasy dirt, paint cannot be directly used in the production of water heating pipe fittings molten casting iron, therefore right
Such waste and old steel are carried out marked as B class raw material.The production of water heating pipe fittings molten casting iron cannot be directly used according to B class raw material
Reason difference classifies to B class raw material.Get rusty since B class raw material surface has, this B class raw material its marked as B1 class raw material,
Since there is greasy dirt on B class raw material surface, this B class raw material its marked as B2 class raw material, since there is paint on B class raw material surface, this B
Class raw material its marked as B3 class raw material.
Second step handles the waste and old steel in part, is allowed to meet the production requirement of water heating pipe fittings molten casting iron
The described requirements of process handles B class raw material, and since B class raw material is divided into, B1 class raw material, B2 class raw material, B3 class are former
Material, it is therefore desirable to B1 class raw material, B2 class raw material, B3 class raw material be handled respectively.
1. the method that pair B1 class raw material is cleaned:
B1 class raw material soaking is entered in metal-derusting liquid, 60-70 DEG C is heated to, stops heating after half an hour, to metal-derusting
B1 class raw material is taken out from metal-derusting liquid after liquid natural cooling.
The metal-derusting liquid the preparation method is as follows:
Step 1, in parts by weight, 2 parts of sodium metasilicate, 1 part of polyethylene glycol-800,0.2 part of polyvinyl alcohol, sodium citrate 0.2 are taken
Part, 0.3 part of lecithin and 20 parts of water, heating is uniformly mixed, and heating temperature is 30 DEG C, 120 revs/min of mixing speed, when stirring
Between 20 minutes, obtain mixture one.
Step 2, in parts by weight, 1 part of triethanolamine, 0.3 part of ammonium molybdate, 0.5 part of triethanolamine oleate, urea 0.1 are taken
Part, 0.3 part of sodium carboxymethylcellulose, 10 parts of water are uniformly mixed, and wherein mixing speed is 100 revs/min, and mixing time 30 is divided
Clock obtains mixture two.
Step 3, in parts by weight, 0.3 part of 1-hydroxy ethylidene-1,1-diphosphonic acid is taken, is added in mixture one, in nitrogen protection
Under the conditions of be heated to 50 DEG C, then low whipping speed is that mixture two is added under 70 revs/min of stirring, after addition
Continue stirring 20 minutes, is added dropwise 0.1 part and 0.1 part of acetic anhydride of ethylenediamine, is uniformly mixed, near room temperature obtains metal-derusting liquid.
2. the method that pair B2 class raw material is cleaned:
450 grams of aqueous cleaning agent, 80 milliliters of activating agent be substantially dissolved in 100 kilograms 40 DEG C or so of water, obtain remove oil
Waterborne cleaning agent, is heated to 40 DEG C or so, keeps this temperature by dirty waterborne cleaning agent, the B2 class raw material that needs are degreased
It is soaked into waterborne cleaning agent, after the B2 class raw material impregnates 2~3 minutes in waterborne cleaning agent, pulls out and be put into dehydration antirust
It is dehydrated in oil, oil is drained after dehydration, the B2 class raw material after cleaning has certain antirust ability.B2 class raw material so after operation
Not only the greasy dirt on surface can have been removed, but also surface oxidisation can have been caused to avoid placing after taking out in waterborne cleaning agent.
The cleaning agent is prepared by 100 kilograms of water, 450 grams of granular cleaning agent and 100 milliliters of activating agent, the work
Property agent be nonionic surfactant.Granular cleaning agent and activating agent is taken to be put into progress in the water that temperature is 30~50 DEG C sufficiently molten
Up to the waterborne cleaning agent after solution.
3. the method that pair B3 class raw material is cleaned:
By eliminating equipment is painted disclosed in the prior art, B3 class raw material is cleaned.The prior art is application number
20101029 publication number CN102059457A publication date 20110518 of the CN201010527521.4 applying date applies for (patent right)
Institute is public in the patent of people Dazu Laser Science & Tech Co Ltd, Shenzhen City, a kind of disclosed laser paint-removing system and its method
The paint minimizing technology opened is operated.
Third step, it is described that production is launched to A class raw material and the B class raw material handled
It is original iron melt that A class raw material and B class raw material are sequentially loaded into melting in smelting furnace by step 1., according to lower tight when being packed into casting ingredient
The principle of upper pine is successively added in smelting furnace, in order to give full play to the positive effect of carbon molecules and carbon atom group in former iron.We want
Its range is controlled 10% or so, casting pressing port, running channel, according to the actual situation generally between 10%--30%, when ingredient first
It determines its dosage, i.e., not have multiresidue, also not use not enough, the quantity of carburant will be according to the quantity of slag situation in furnace
And estimated value substantially determines.It can reach the carbon amounts requirement of production nodular iron casting substantially according to the ratio of 6:100.
Carburant is placed on smelting furnace lower part by step 2., is allowed molten iron sufficiently to infiltrate and is waited carbon agent dissolution and diffusion, charging sequence
Then briquetting is added in the raw material iron that 5-10% is first added, 60% carburant is first added when having 10% or so molten iron in leftover pieces, to 70%
When all add, be added ferrosilicon when 80%, ferrosilicon addition can reduce carburant uptake too early, carry out on-the-spot sample analysis work,
If carbon amounts difference is too many, we should be put into carburant bull ladle and carry out the work of falling furnaceman.This is increased using low temperature carburetting, high temperature
The principle of silicon, until can come out of the stove after temperature component is qualified.Smelting temperature is 1500~1600 DEG C, and is added in original iron melt
Copper alloy, the mass percentage of copper alloy are the 1.2~1.5% of the casting ingredient total amount；It is stepped up in fusion process
Temperature of smelting furnace, and often carry out smashing and expect to operate, after smelting copper alloy, before coming out of the stove, add in the original iron melt after being fused into smelting furnace
Enter the pretreating agent based on barium, supplemented by lanthanum, to there is 2-3 minutes hot-metal insulating time, not skim tapping, such as pomace immediately
Measure big carbon agent can be clawed together with slag cause off analysis and waste.
Step 3. we in traditional proportioning process, take the lead in carrying out test and be added to deoxidation link, in going to for tapping
1% or so deoxidier is added in nodularization packet, the deoxidier is perlite, its spheroidizing quality is made to have substantial increase, is added de-
The participation of sulphur agent, then pours into original iron melt in sprue cup, and sulphur oxygen inovulant is added into sprue cup and carries out womb again
It manages, dispenses perlite on original iron melt again after second of inoculation to purify original iron melt.
In this way can within 20min nodulizing grade meet technique requirement, breed aspect take Multi inoculation process and
Carbon particulate is compound inoculated, so that obtaining bigger progress on the basis of traditional 75# ferrosilicon is bred, that reinforces operation link checks power severely
Degree accomplishes that nodulizing grade remains 1-3 grade of level, graphite nodule without any defect, tapping temperature control technique requirement ±
10 degree or so, metallographic qualification rate is up to 100%.
Claims (10)
1. a kind of method using waste and old steel melting water heating pipe fittings molten iron, it is characterised in that: including dividing waste and old steel
Class screening, it is described that the waste and old steel of recycling are distinguished by label according to classification standard, the waste and old steel in the part of label are handled,
It is allowed to meet the production requirement of water heating pipe fittings molten casting iron, the waste and old steel of the production requirement of water heating pipe fittings molten casting iron will be met
Melting is original iron melt.
2. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 1, it is characterised in that: institute
State classification standard is whether to meet the production requirement of water heating pipe fittings molten casting iron, the production for not meeting water heating pipe fittings molten casting iron is wanted
The waste and old steel label C class raw material asked.
3. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 2, it is characterised in that: institute
The steel for carrying out production and processing and using can be put into smelting furnace without processing by stating, described by further place marked as A class raw material
Can produce and process the steel used marked as B class raw material in compound investment smelting furnace after reason.
4. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 3, it is characterised in that: institute
The waste and old steel for stating recycling include the common waste and old steel such as steel structural part, leftover pieces, packing material, A3,45# steel, work as recycling
When the above-mentioned content of waste and old steel afterwards does not meet the content requirement of the element, the waste and old steel, which belong to, be may not be usable for
Waste and old steel required for water heating pipe fittings molten casting iron produces carry out label to such waste and old steel after the recovery, marked as C class
Raw material needs to screen above-mentioned C class raw material from waste and old steel.
5. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 4, it is characterised in that: institute
State meet water heating pipe fittings casting institute's steel need to meet its requirement containing C≤1%, Si≤1%, Mn≤0.5%, P≤0.04%.
6. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 5, it is characterised in that: institute
It states waste and old steel and meets the requirement of C≤1%, Si≤1%, Mn≤0.5%, P≤0.04%, but cannot be used directly for water heating pipe fittings casting
It makes molten iron to be produced, it is therefore desirable to classify to above-mentioned waste and old steel again.
7. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 6, it is characterised in that: institute
State again subseries standard be waste and old steel surface whether there is or not get rusty, surface whether there is or not greasy dirt, surface whether there is or not paint, the surface is without life
Rust, the waste and old steel without greasy dirt, without paint are used directly for the production of water heating pipe fittings molten casting iron, to such waste and old steel into
Line label be A class raw material, the waste and old steel surface have get rusty, the waste and old steel of greasy dirt, paint cannot be directly used in hot-water heating
The production of pipe fitting molten casting iron, therefore such waste and old steel are carried out marked as B class raw material.
8. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 7, it is characterised in that: institute
It states the reason of cannot being directly used in the production of water heating pipe fittings molten casting iron according to B class raw material difference to classify to B class raw material, institute
B class raw material surface oxidisation is stated, marked as B1 class raw material, there is greasy dirt on the B class raw material surface, former marked as B2 class
Material, there is paint on the B class raw material surface, marked as B3 class raw material.
9. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 8, it is characterised in that: institute
It states and B1 class raw material is cleaned, be allowed to meet the production requirement of water heating pipe fittings molten casting iron, it is described that B2 class raw material is carried out clearly
It washes, is allowed to meet the production requirement of water heating pipe fittings molten casting iron, it is described that B3 class raw material is cleaned, it is allowed to meet water heating pipe fittings
The production requirement of molten casting iron.
10. a kind of method using waste and old steel melting water heating pipe fittings molten iron according to claim 9, it is characterised in that:
It is described by A class raw material and treated above-mentioned B class raw material to be sequentially loaded into smelting furnace melting be to meet water heating pipe fittings molten casting iron
Production requirement original iron melt.
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| CN102251164A (en) * | 2011-07-01 | 2011-11-23 | 江苏兴盛风能科技有限公司 | Smelting method for wind generating set casting |
| CN106636523A (en) * | 2016-09-27 | 2017-05-10 | 宝鸡市晨瑞鑫铸造有限责任公司 | Method for preparing nodular cast iron through full scrap steel |
| CN107083515A (en) * | 2017-04-13 | 2017-08-22 | 四川省川建管道有限公司 | A kind of method of smelting of producing nodular iron castings |
| CN107974611A (en) * | 2017-11-30 | 2018-05-01 | 江苏沃得机电集团有限公司 | A kind of full smelting scrap steel casting QT900-5 spheroidal graphite cast-iron and its production technology |
| CN108531679A (en) * | 2018-04-19 | 2018-09-14 | 南通冠峰铸造有限公司 | A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting |
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2018
- 2018-11-26 CN CN201811412439.XA patent/CN109487148A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251164A (en) * | 2011-07-01 | 2011-11-23 | 江苏兴盛风能科技有限公司 | Smelting method for wind generating set casting |
| CN106636523A (en) * | 2016-09-27 | 2017-05-10 | 宝鸡市晨瑞鑫铸造有限责任公司 | Method for preparing nodular cast iron through full scrap steel |
| CN107083515A (en) * | 2017-04-13 | 2017-08-22 | 四川省川建管道有限公司 | A kind of method of smelting of producing nodular iron castings |
| CN107974611A (en) * | 2017-11-30 | 2018-05-01 | 江苏沃得机电集团有限公司 | A kind of full smelting scrap steel casting QT900-5 spheroidal graphite cast-iron and its production technology |
| CN108531679A (en) * | 2018-04-19 | 2018-09-14 | 南通冠峰铸造有限公司 | A kind of technique of pure smelting scrap steel magnesium iron and gray iron casting |
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