CN102884210B - Spheroidizing method - Google Patents
Spheroidizing method Download PDFInfo
- Publication number
- CN102884210B CN102884210B CN201280000506.1A CN201280000506A CN102884210B CN 102884210 B CN102884210 B CN 102884210B CN 201280000506 A CN201280000506 A CN 201280000506A CN 102884210 B CN102884210 B CN 102884210B
- Authority
- CN
- China
- Prior art keywords
- steel tube
- rectangular steel
- spheroidizing
- clad
- refractory brick
- 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
- 238000000034 method Methods 0.000 title claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 147
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 239000011449 brick Substances 0.000 claims abstract description 76
- 229910052742 iron Inorganic materials 0.000 claims abstract description 73
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 67
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 62
- 239000011777 magnesium Substances 0.000 claims abstract description 47
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 38
- 239000000956 alloy Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 86
- 229910052749 magnesium Inorganic materials 0.000 claims description 40
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 39
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 36
- 239000002054 inoculum Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 229910001122 Mischmetal Inorganic materials 0.000 claims description 11
- WMOHXRDWCVHXGS-UHFFFAOYSA-N [La].[Ce] Chemical compound [La].[Ce] WMOHXRDWCVHXGS-UHFFFAOYSA-N 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000010451 perlite Substances 0.000 claims description 6
- 235000019362 perlite Nutrition 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 239000002667 nucleating agent Substances 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 4
- 229910000858 La alloy Inorganic materials 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 238000005266 casting Methods 0.000 abstract description 6
- APGROBRHKCQTIA-UHFFFAOYSA-N [Mg].[Si].[Fe] Chemical compound [Mg].[Si].[Fe] APGROBRHKCQTIA-UHFFFAOYSA-N 0.000 abstract 3
- 239000012530 fluid Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 102000005298 Iron-Sulfur Proteins Human genes 0.000 description 1
- 108010081409 Iron-Sulfur Proteins Proteins 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
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
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- 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
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a spheroidizing method for producing spheroidal graphite cast iron, and the method comprises the following steps: injecting melted rare earth magnesium silicon iron nodulizer alloy fluid containing less than or equal to 20% of Mg, less than or equal to 65% of Si and less than or equal to 3% of RE into a square steel pipe for cooling and solidification; fixing the whole rare earth magnesium silicon iron nodulizer of the outer lining square steel pipe in a spheroidizing bag by using refractory bricks and wedge-type chocks at the bottom of the spheroidizing bag covered, and then carrying out spheroidizing by utilizing a bag injecting method. The time for controlling spheroidizing is accurate, the molten iron cooling is less in the spheroidizing and casting process, the absorption rate of Mg, RE and Si after the spheroidizing is high, degradated spheroidization is prevented 15min after spheroidizing, the environment for producing and using a nodulizer is improved, the production cost is remarkably reduced and the quality of the product is improved. Compared with the conventional rare earth magnesium silicon iron nodulizer containing the rare-earth element RE of 2-8%, the spheroidizing method can be used for reducing the use amount of the rare-earth element RE by 50-75%.
Description
Technical field
The invention relates to and produce the nodulizing process of spheroidal graphite cast iron, more specifically say the method that adopts the spheroidizing of pouring Bao Neifa that the block rare earth ferrosilicomagnesium nodulizing agent of outer lining square steel pipe carries out in nodularization bag.
Background technology
In the enterprise that produces nodular iron casting, extensively adopt rare earth magnesium ferrosilicon alloy as nodulizing agent.Rare earth magnesium ferrosilicon alloy nodulizing agent is the nodulizing agent of at present domestic and international consumption maximum, but energy consumption is high in its traditional production process, and melting loss is large, and environmental pollution is serious, and traditional nodulizing agent is because the specific absorption of magnesium is low, and its add-on is larger.For a long time, technician both domestic and external has carried out unremitting effort research to the production technique that pours Bao Neifa spheriodization process thereof technology and rare earth ferrosilicomagnesium nodulizing agent.
At present, adopting the production technique that pours Bao Neifa spheroidizing taking rare earth ferrosilicomagnesium as nodulizing agent, when tapping temperature is more than 1480 DEG C, spheroidizing wraps under the red heat bag state of continuous use, and Mg content is >=8% time, and spheroidizing reacion situation is aggravated with the rising of temperature, there is strong magnesium light, even cause molten iron to splash, result is that the specific absorption of effective element Mg and RE reduces, and causes the molten iron later stage decline through spheroidizing, and nodulizing grade declines.Traditional terms of settlement is 1. in the time of melting nodulizing agent, to add a certain amount of SiCa alloy to improve containing Ca to measure to alleviate its explosive reaction, increases SiCa alloy and makes undoubtedly production cost increase.2. the Mg content in nodulizing agent is controlled at 8% left and right or≤8% alleviate reaction.3. in rare earth ferrosilicomagnesium nodulizing agent drops into the dykes and dams of hot metal ladle, cover pig scrap thereon and beat in fact, also having and in bag, add dead head, bushel iron piece to reduce molten iron temperature of reaction in bag.4. in bag, drop into nodulizing agent and breed after ferrosilicon, cover the poly-slag agent of perlite thereon or cover iron plate thereon.Although above-mentioned measure produces effect to the violent situation of controlling magnesium alloy reaction, but reaction finishes, molten iron cooling is larger, and molten iron surface scum is many, the stability of spheroidizing reacion is subject to the impact of molten iron temperature and changes, and the specific absorption fluctuation range of effective element Mg, RE and Si is large; When base iron sulphur content for the high temperature liquid iron of cupola melting before nodularization is higher, only taking to improve the add-on of nodulizing agent and increase the content of RE and Ca in nodulizing agent, is very limited and the content of Mg in nodulizing agent is increased again under pyroprocessing situation at present.
The Chinese invention patent publication number CN101029367A name of my application is called two patent applications that " spheroidization apparatus and spheriodization process thereof " and publication number CN101509084A name are called " production method of nodulizing agent ", now equal patented power, solve while pouring Bao Neifa spheroidizing and reacted violent, the problem that effective element specific absorption is low, also solved rare earth ferrosilicomagnesium nodulizing agent and in the process of founding, reacted violent, scaling loss is larger, the problem of inoculant alloy component segregation, the improved problem of still needing: adopt spheroidization apparatus to carry out spheroidizing, need utilize the structure of dam-type spheroidizing bag, for rare earth ferrosilicomagnesium nodulizing agent and nucleating agent are all put in dykes and dams, dykes and dams must have enough height, the dykes and dams height of the 1000kg nodularization bag of for example newly building by laying reaches 23cm, the increase of dykes and dams height improves the bursting point position of nodulizing agent fusing boiling reaction, be unfavorable for absorption and the iron water purification of effective element.The time of controlling spheroidizing reacion needs the situation of pack processing according to the observation to control the position of pole pressure head, accomplish without the smokeless spheroidizing required time of magnesium light longer.Dykes and dams in bag are easily dross, damage after spheroidizing, occurs that these problems will affect the stable of spheroidizing quality, have also increased the workload of repairing hot metal ladle simultaneously.
On October 24th, 2011, I have applied for that again international application no is PCT/CN2011/001762, and name is called the application for a patent for invention of " smokeless spheroidizing method ".Be characterized in adopting the 3rd bolt on column and Position Scale and nut be the steering shaft on the pressure thick stick of rotating shaft rotation the first bolted-on connection pole pressure head mode or adopt the gib head suspention of motor drive driving motion weight handling equipment to there is the mode of the pole pressure head of balance weight iron, utilize pole pressure head that the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube is fixed in nodularization bag, adopt and pour Bao Neifa processing.Its weak point is that the block rare earth ferrosilicomagnesium nodulizing agent of the entirety of fixing outer lining square steel pipe need rely on pole pressure head, be unfavorable for adopting the nodularization mode of clad of covering, the damage of pole pressure head and in high temperature spheroidizing process overall rare earth ferrosilicomagnesium nodulizing agent mobile floating after melting loss of outer lining rectangular steel tube all can affect the quality of spheroidizing.
Summary of the invention
The object of this invention is to provide a kind of nodulizing process, utilize the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube to coordinate the spheroidizing bag that covers clad, the problem that when Bao Neifa spheroidizing is poured in solution, reaction is violent, effective element specific absorption is low, accurately control the spheroidizing reacion time, improve the quality of products, reduce production costs, give full play to and utilize resource, significantly improve the production environment of nodulizing agent making processes and use procedure.
For achieving the above object, by melt containing Mg≤20%, be injected in rectangular steel tube containing Si≤65% with containing the rare earth ferrosilicomagnesium inoculant alloy liquid of RE≤3%, until its solidify cooling after, just obtained taking rectangular steel tube as outer lining, the overall rare earth ferrosilicomagnesium nodulizing agent of both ends open, vertically build the first refractory brick by laying bricks or stones at the bottom margin place of nodularization bag as shown in Figure 1, build the second refractory brick by laying bricks or stones with level near it, the other end of the second refractory brick has been built the 3rd refractory brick by laying bricks or stones, be close to the 3rd refractory brick and vertically built the 4th refractory brick by laying bricks or stones, the 5th refractory brick and the equal level of the 6th refractory brick are built by laying bricks or stones between the 4th refractory brick and nodularization handbag wall, the 5th refractory brick is overlapping builds by laying bricks or stones on the 6th refractory brick, build second refractory brick of building by laying bricks or stones lower than level at its height of the 3rd refractory brick of nodularization bag bottom by laying bricks or stones, in the time of continuous production spheroidizing, a small amount of dross can not hinder the carrying out of operation.Be provided with covering clad in the upper end of nodularization bag, cover clad and be divided into half clad that U-shaped sprue cup is installed and half clad two portions can opening rotation, movable for ease of repairing the U-shaped sprue cup wrapping on half clad that U-shaped sprue cup is installed, can conveniently U-shaped sprue cup be taken off to repairing, U-shaped sprue cup is lining refractories outside skeleton taking iron plate and reinforcing bar, half clad and clad fixed sleeving that U-shaped sprue cup is installed are welded into one, half clad and the clad revoling tube that can open rotation are welded into one, rotation axis is as a whole by half clad of U-shaped sprue cup being installed and can being opened half clad combination of rotation through clad fixed sleeving and clad revoling tube, on half clad can opening rotation, be provided with through hole, on through hole, be welded with guide thimble, one end of papery hollow sleeve is coupled the fixing rear guide thimble that inserts of holding bolt on sleeve pipe, can measure in time the liquid level of molten iron in bag, on half clad that U-shaped sprue cup is installed, be provided with the first fastening sleeve pipe, can open on half clad of rotation and be provided with the second fixed sleeving, on half clad that U-shaped sprue cup is installed, be welded with clad locating shaft, wrapping the clad locating sleeve of end by being welded on nodularization fixes half clad that U-shaped sprue cup is installed, half clad that minor axis can be opened rotation through the second fixed sleeving and the first fixed sleeving is fixed, by the spheroidizing bag constructing and cover clad dry after for spheroidizing.
In order further to improve the utilization ratio of rare earth element, design and made the lanthanum cerium mischmetal metal that is equipped with as shown in Figures 3 and 4 outer lining rectangular steel tube in overall magnesium ferrosilicon nodulizing agent inside, the overall magnesium ferrosilicon nodulizing agent of outer lining rectangular steel tube is identical with the direction that its alloy of lanthanum cerium mischmetal metal of outer lining rectangular steel tube exposes opening, mode with welding is bound up the lanthanum cerium mischmetal metal of outer lining rectangular steel tube and the compound outer lining rectangular steel tube that holds overall magnesium ferrosilicon nodulizing agent, by the overall magnesium ferrosilicon inoculant alloy liquid melting be injected in compound outer lining rectangular steel tube, solidify cooling.In order to accelerate the cooling of inoculant alloy liquid, between the rectangular steel tube of assembled arrangement that pours inoculant alloy liquid, set up cooling iron and inoculant alloy liquid upper cover iron plate is set, reduce Segregation of Chemical Composition and the melting loss of nodulizing agent; Molten iron pours nodularization bag, and after spheroidizing reacion starts, in being finally less than in reaction times of 50% of whole spheroidizing reacion process, the lanthanum cerium mischmetal metal of outer lining rectangular steel tube starts to participate in spheroidizing reacion, effectively supplements required ree content.
Adopt Fig. 3 and Fig. 4 to be shown in overall magnesium ferrosilicon nodulizing agent inside to be equipped with the mode of the lanthanum cerium mischmetal metal of outer lining rectangular steel tube, be equipped with the overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube in overall magnesium ferrosilicon nodulizing agent inside, the overall magnesium ferrosilicon nodulizing agent of outer lining rectangular steel tube is identical with the direction that its alloy of overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube exposes opening, mode with welding is bound up the overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube and the compound outer lining rectangular steel tube that holds overall magnesium ferrosilicon nodulizing agent, by the overall magnesium ferrosilicon inoculant alloy liquid melting be injected in compound outer lining rectangular steel tube, solidify cooling, between the rectangular steel tube of assembled arrangement that pours inoculant alloy liquid, set up cooling iron and inoculant alloy liquid upper cover iron plate is set, molten iron pours nodularization bag (1), after spheroidizing reacion starts, in being finally less than in reaction times of 50% of whole spheroidizing reacion process, the overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube starts to participate in spheroidizing reacion, effectively supplements required ree content.
Rectangular steel tube outward appearance rule is neat, to after its opening up assembled arrangement, will adopt the ferro-silicon liquid One-step production of mine heat furnace smelting or the rare earth ferrosilicomagnesium inoculant alloy liquid of electric furnace secondary remelting method production to be poured into wherein, owing to setting up cooling iron and the reason of inoculant alloy liquid upper cover iron plate is set between the rectangular steel tube of assembled arrangement that pours inoculant alloy liquid, accelerate the cooled and solidified of inoculant alloy liquid, reduce the Segregation of Chemical Composition of nodulizing agent, the overall inoculant alloy of outer lining rectangular steel tube does not need fragmentation and screening, is convenient to carrying and piles up.
Its spheroidizing step is as follows:
A, open half clad of rotation, the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube is put into nodularization bag to be arrived behind predetermined position, the first wedge type chock that the material of refractory brick is made inserts push-tight, the second wedge type chock insertion push-tight of putting into the upper cover plate that refractory brick material makes and making with the material of refractory brick;
B, in nodularization bag, drop into ferrosilicon nucleating agent;
C, close half clad of rotation, on guide thimble, insert the papery hollow sleeve with adapter sleeve and holding bolt;
D, molten iron pour nodularization bag by U-shaped sprue cup and carry out spheroidizing reacion;
E, treat that papery hollow sleeve moves and float the molten iron pouring and reach predetermined molten iron height and stop pouring molten iron;
After f, spheroidizing reacion finish, fill into surplus molten iron, open half clad of rotation;
G, to adopt add-on 0.1% granularity 5mm composition after skimming be that the composite inoculant of Mg3-6%, RE1-2%, 40-50%Si covers molten iron, closes half clad of rotation and insert the first fixed sleeving locking with minor axis.
Beneficial effect of the present invention: due to overall rare earth ferrosilicomagnesium nodulizing agent by wedge shape chock stable be fixed on hot metal ladle bottom, when spheroidizing reacion, producing Mei Bamboo gas can be expedite in the diffusion of hot metal ladle bottom, prevent from moving the problem floating after overall rare earth ferrosilicomagnesium nodulizing agent melting loss, solve and while pouring Bao Neifa spheroidizing, reacted violent molten iron and splash, the problem that effective element specific absorption is low, because molten iron discharging temperature when the few spheroidizing of molten iron cooling can reduce by 30～50 DEG C, owing to closing after half clad of rotation, the U-shaped sprue cup of installing is the import and export of pouring molten iron and pouring molten iron, make the area that wraps interior molten iron level exposure reduce to 3～4% of former exposed area, in spheroidizing reacion process and casting process, the loss and the escape that prevent magnesium are played to active effect, in the time not pursuing least cost spheroidizing, can realize without the smokeless spheroidizing of magnesium light.Can accurately control the spheroidizing reacion time, in the case of 100 DEG C of the molten iron temperature fluctuation < that pour, the spheroidizing reacion time, upper lower variation of tolerance was less than for 5 seconds.With traditional containing Mg8%, containing RE5% and containing the nodulizing agent of Si41% with taking rectangular steel tube as outer lining, built-in containing Mg15%, containing RE1% with compare containing the Integral ball agent of Si54%, adopt the overall rare earth ferrosilicomagnesium nodulizing agent of the outer lining rectangular steel tube of One-step production or the production of electric furnace secondary remelting method to compare with traditional rare earth ferrosilicomagnesium nodulizing agent, its products production cost can reduce by 25%～30%, comprises outer lining rectangular steel tube and add weight to reduce by 25～30% than traditional nodulizing agent at interior overall rare earth ferrosilicomagnesium nodulizing agent in the time of spheroidizing; Prove through repetition test, novel process spheroidization treatment temperature is when changing between 1450 DEG C～1578 DEG C, the overall rare earth ferrosilicomagnesium nodulizing agent add-on of its outer lining rectangular steel tube is constant, the spheroidizing reacion time is substantially constant, on nodularization result without impact, while having overcome traditional technology spheroidizing, along with the rising of nodularization temperature need increase the problem of the add-on of nodulizing agent; Improve the production environment of nodulizing agent making processes and use procedure.Be PCT/CN2011/001762 with immediate international application no, name is called the patent of invention of " smokeless spheroidizing method " and compares, under the condition of identical rare earth ferrosilicomagnesium nodulizing agent chemical composition and identical spheroidization treatment temperature, the effective spheroidizing reacion time of overall rare earth ferrosilicomagnesium nodulizing agent that is equipped with outer lining rectangular steel tube is more accurate, in spheroidizing and casting process, molten iron cooling is less and to preventing that the loss of magnesium and the decaying spheroidisation that escape causes from having produced unusual effect, effective element Mg, the specific absorption of RE and Si is high, for rare earth elements RE content at 2～8% traditional rare earth magnesium ferrosilicon nodulizing agent, adopt this technique, the consumption of its rare earth elements RE can reduce by 50～75%.
Brief description of the drawings:
Fig. 1 is provided with U-shaped sprue cup and covers the sectional view of having settled the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube in the nodularization bag of clad.
Fig. 2 is provided with U-shaped sprue cup and covers the vertical view of having settled the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube in the nodularization bag of clad.
Fig. 3 is the sectional view that the overall magnesium ferrosilicon nodulizing agent inside of compound outer lining rectangular steel tube is equipped with the lanthanum cerium mischmetal metal of outer lining rectangular steel tube.
Fig. 4 is the left view that the overall magnesium ferrosilicon nodulizing agent inside of compound outer lining rectangular steel tube is equipped with the lanthanum cerium mischmetal metal of outer lining rectangular steel tube.
Description of reference numerals: 1 is nodularization bag, 2 is the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube, 3 is the first wedge shape chock, 4 upper cover plates for the making of refractory brick material, 5 is the second wedge shape chock, 6 is the first refractory brick, 7 is the second refractory brick, 8 is the 3rd refractory brick, 9 for being the 4th refractory brick, 10 is the 5th refractory brick, 11 is the 6th refractory brick, 12 is U-shaped sprue cup, 13 for installing half clad of U-shaped sprue cup, 14 is rotation axis, 15 is papery hollow sleeve, 16 half clad for rotation, 17 is guide thimble, 18 is adapter sleeve, 19 is holding bolt, 20 is the first fastening sleeve pipe, 21 second fastening sleeve pipes, 22 is minor axis, 23 is clad fixed sleeving, 24 is clad revoling tube, 25 is clad locating sleeve, 26 is clad locating shaft, 27 is overall magnesium ferrosilicon nodulizing agent, 28 is the lanthanum cerium mischmetal metal of outer lining rectangular steel tube, 29 is the rectangular steel tube of compound outer lining.
Embodiment:
By reference to the accompanying drawings enforcement of the present invention is further described: the rectangular steel tube of overall rare earth ferrosilicomagnesium nodulizing agent outer lining and wedge shape chock have played keying action to reaction condition and the effective reaction time of controlling magnesium-rare earth, wedge shape chock adopts the material of refractory brick to make, require wedge shape chock can adopt refractory brick factory directly to make according to geomery, also can utilize makita 4100NH to cut on request refractory brick makes, < 3mm is answered in gap between the refractory brick of building by laying in nodularization bag 1, adopt when nodularization bag 1 carries out spheroidizing as shown in Figure 1, at the bottom of nodularization handbag, the upper cover plate 4 that the 4th refractory brick 9 and refractory brick material are made closely surrounds it with 3 four fire proofed wood charge levels of the first wedge shape chock, delay the burn-off rate of rectangular steel tube, therefore, the wall thickness of rectangular steel tube is chosen in 2～4mm and just can meets the needs of spheroidizing, be greater than 1480 DEG C for spheroidization treatment temperature, the spheroidizing reacion time is when longer, , select the wall thickness of higher limit.Above-mentioned rectangular steel tube used also can be selected the material of cast iron, adopts the method manufacture of casting.Learnt by experiment, for preventing that the spheroidizing time is too short, reaction is too fierce, the height that the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube is placed in spheroidizing bag is advisable with < 12cm, when the iron water amount of spheroidizing is more, should adopt the structure of the identical welding side by side of more than 2 rectangular steel tube opening direction combination; Adopt the steel plate that is less than steel pipe thickness to control the initial reaction state of spheroidizing reacion with a part for the mode shutoff outer lining rectangular steel tube both ends open of welding at rectangular steel tube opening direction.Above-mentioned outer lining rectangular steel tube material used used is straight carbon steel and there is no coating.With roughly the same overall rare earth ferrosilicomagnesium nodulizing agent 2 or the wedge type chock of the long handle irony fixture clamping outer lining rectangular steel tube of brick folding iron clamp are put in nodularization bag 1; After pouring, molten ductile iron removes the dross on nodularization bag 1 refractory brick with long handle spades; Papery hollow sleeve 15 pipes on clad adopt discarded even paper tube of molten iron thermometric; Compound inoculated composition is Mg5～8%, RE1～2%, Si40～50%, its granularity < 5mm.
The upper cover plate 4 that the upper cover plate displacement refractory brick material made from cast iron quality is made is also cancelled and is inserted the second wedge type chock 5 made from refractory brick material; Only change a in above-mentioned spheroidizing step: half clad 16 of opening rotation, the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube is put into nodularization bag 1 to be arrived behind predetermined position, the first wedge type chock 3 that the material of refractory brick is made inserts push-tight, places the upper cover plate made from cast iron quality on the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube; Prevent the too early melting loss in top of outer lining rectangular steel tube.
The upper cover plate 4 made from the poly-slag agent displacement of perlite refractory brick material is also cancelled and is inserted the second wedge type chock 5 made from refractory brick material; Only change a in its spheroidizing step: half clad 16 of opening rotation, the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube is put into nodularization bag 1 to be arrived behind predetermined position, the first wedge type chock 3 that the material of refractory brick is made inserts push-tight, places the poly-slag agent of perlite on the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube.
When more for the iron water amount of spheroidizing, in order to reduce the height of overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube, also can adopt rectangular steel pipe displacement rectangular steel tube as its outer lining.
For the molten iron casting time through spheroidizing, more in short-term, above-mentioned nodulizing process can be cancelled it and cover clad, and employing is poured Bao Neifa and carried out spheroidizing.
When molten iron sulfur-bearing is lower after spheroidizing, after spheroidizing reacion finishes to skim, cancels above-mentioned composite inoculant and cover molten iron; Adopt and only add the silicon titanate innoculant of processing weight of molten iron 0.2% granularity≤5mm to cover molten iron.
Embodiment 1: carry out under cold blast cupola melting condition, melting rate is 2 tons/hour, adopt the overall rare earth ferrosilicomagnesium nodulizing agent 2 with outer lining rectangular steel tube shown in accompanying drawing 1 to be carried out spheroidizing by the stable mode being fixed at the bottom of hot metal ladle of wedge shape chock, it is 1000kg that every bag is processed weight of molten iron, red heat bag continuous operation uses, iron notch molten iron temperature is 1485 DEG C, base iron sulphur content 0.063%, do not comprise that the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube is containing Mg15%, containing RE2% with containing Si58%, its input comprises that the weight of the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube accounts for 1.15% of processed weight of molten iron, in 72SiFe nucleating agent bag, add 0.4%, in the time of spheroidizing reacion, do not cover iron dust and perlite, after spheroidizing reacion finishes to skim, the add-on of secondary composite inoculant is 0.10%, 35 seconds 2 points of spheroidizing reacion times, for without magnesium light molten iron boiling reaction, spheroidizing reacion finishes rear 16 points of samplings in 30 seconds, 2 grades of nodulizing grades.
Embodiment 2: carry out under electrosmelting of intermediate frequency condition, adopt the overall rare earth ferrosilicomagnesium nodulizing agent 2 with outer lining rectangular steel tube shown in accompanying drawing 1 to be carried out spheroidizing by the stable mode being fixed at the bottom of hot metal ladle of wedge shape chock, it is 1000kg that every bag is processed weight of molten iron, electric furnace molten iron discharging temperature is 1568 DEG C, base iron sulphur content 0.025%, do not comprise that the overall rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangular steel tube is containing Mg12.5%, containing RE1% with containing Si58%, its input comprises that the weight of the overall rare earth ferrosilicomagnesium nodulizing agent 2 of outer lining rectangular steel tube accounts for 0.75% of processed weight of molten iron, in 72SiFe nucleating agent bag, add 0.35%, it is incorporated as 0.2% after spheroidizing reacion finishes to skim, to adopt the silicon titanate innoculant of granularity≤5mm to cover molten iron, do not covering in iron filings and perlitic situation, the spheroidizing reacion time 1 point 45 seconds, spheroidizing reacion is steady, splash without molten iron, spheroidizing reacion finishes rear sulfur content of hot metal 0.008%, magnesium content 0.045%, spheroidizing reacion finishes sampling in 12 minutes, 2 grades of nodulizing grades.
Claims (9)
1. the nodulizing process about production spheroidal graphite cast iron, the first part of its feature is nodulizing agent: by melt containing Mg≤20%, be injected into and solidify coolingly in rectangular steel tube containing Si≤65% with containing the rare earth ferrosilicomagnesium inoculant alloy liquid of RE≤3%, between the rectangular steel tube of assembled arrangement that pours inoculant alloy liquid, set up cooling iron and inoculant alloy liquid upper cover iron plate be set; the second section of its feature is the spheroidizing bag that covers clad: vertically built the first refractory brick (6) by laying bricks or stones at the bottom margin place of nodularization bag (1), build the second refractory brick (7) by laying bricks or stones with level near it, the other end of the second refractory brick (7) has been built the 3rd refractory brick (8) by laying bricks or stones, be close to the 3rd refractory brick (8) and vertically built the 4th refractory brick (9) by laying bricks or stones, the 5th refractory brick (10) and the 6th refractory brick (11) all level are built by laying bricks or stones between the 4th refractory brick (9) and nodularization bag (1) bag wall, the 5th refractory brick (10) is overlapping builds by laying bricks or stones on the 6th refractory brick (11), build second refractory brick (7) of building by laying bricks or stones lower than level at its height of the 3rd refractory brick (8) of nodularization bag (1) bottom by laying bricks or stones, upper end at nodularization bag (1) is provided with covering clad, cover clad and be divided into half clad (16) two portions of half clad (13) of U-shaped sprue cup being installed and can being opened rotation, U-shaped sprue cup (12) on half clad (13) that U-shaped sprue cup is installed is movable, the U-shaped sprue cup (12) of installing is for pouring the import and export of molten iron and pouring molten iron, U-shaped sprue cup (12) is lining refractories outside skeleton taking iron plate and reinforcing bar, half clad (13) that U-shaped sprue cup is installed is welded into one with clad fixed sleeving (23), half clad (16) that can open rotation is welded into one with clad revoling tube (24), rotation axis (14) combines as a whole through clad fixed sleeving (23) and clad revoling tube (24) by half clad (16) of half clad (13) of U-shaped sprue cup being installed and can open rotation, on half clad (16) that can open rotation, be provided with through hole, on through hole, be welded with guide thimble (17), one end of papery hollow sleeve (15) is coupled the fixing rear guide thimble (17) that inserts of holding bolt (19) on sleeve pipe (18), on half clad that U-shaped sprue cup is installed, (13) are provided with the first fastening sleeve pipe (20), can open on half clad (16) of rotation and be provided with the second fixed sleeving (21), on half clad (13) that U-shaped sprue cup is installed, be welded with clad locating shaft (26), by the clad locating sleeve (25) that is welded on nodularization bag (1) upper end, half clad (13) that U-shaped sprue cup is installed is fixed, half clad (16) that minor axis (22) can be opened rotation through the second fixed sleeving (21) and the first fixed sleeving (20) is fixed, by the spheroidizing bag constructing and cover clad dry after for spheroidizing,
Its spheroidizing step is as follows:
A, open half clad (16) of rotation, the overall rare earth ferrosilicomagnesium nodulizing agent (2) of outer lining rectangular steel tube is put into nodularization bag (1) to be arrived behind predetermined position, the first wedge type chock (3) that the material of refractory brick is made inserts push-tight, second wedge type chock (5) the insertion push-tight of putting into the upper cover plate (4) of refractory brick material making and making with the material of refractory brick;
B, in nodularization bag (1), drop into ferrosilicon nucleating agent;
C, close half clad (16) of rotation, at the upper papery hollow sleeve (15) with adapter sleeve (18) and holding bolt (19) that inserts of guide thimble (17);
D, molten iron pour nodularization bag (1) by U-shaped sprue cup (12) and carry out spheroidizing reacion;
E, treat that papery hollow sleeve (15) is mobile and float the molten iron pouring and reach predetermined molten iron height and stop pouring molten iron;
F, spheroidizing reacion finish to fill into surplus molten iron, open half clad (16) of rotation;
G, to adopt add-on 0.1% granularity≤5mm composition after skimming be that the composite inoculant of Mg3-6%, RE1-2%, 40-50%Si covers molten iron, closes half clad (16) of rotation and insert the first fixed sleeving (20) locking with minor axis (22).
2. nodulizing process according to claim 1, is characterized in that adopting the ferro-silicon liquid One-step production of mine heat furnace smelting or the rare earth ferrosilicomagnesium inoculant alloy liquid of electric furnace secondary remelting method production to be poured in rectangular steel tube.
3. nodulizing process according to claim 1, is characterized in that the upper cover plate (4) of the upper cover plate displacement refractory brick material making made from cast iron quality and cancels and insert the second wedge type chock (5) made from refractory brick material; Only change a in its spheroidizing step: half clad (16) of opening rotation, the overall rare earth ferrosilicomagnesium nodulizing agent (2) of outer lining rectangular steel tube is put into nodularization bag (1) to be arrived behind predetermined position, the first wedge type chock (3) that the material of refractory brick is made inserts push-tight, at the upper upper cover plate made from cast iron quality of placing of overall rare earth ferrosilicomagnesium nodulizing agent (2) of outer lining rectangular steel tube.
4. nodulizing process according to claim 1, is characterized in that the upper cover plate (4) made from the poly-slag agent displacement of perlite refractory brick material and cancels and insert the second wedge type chock (5) made from refractory brick material; Only change a in its spheroidizing step: half clad (16) of opening rotation, the overall rare earth ferrosilicomagnesium nodulizing agent (2) of outer lining rectangular steel tube is put into nodularization bag (1) to be arrived behind predetermined position, the first wedge type chock (3) that the material of refractory brick is made inserts push-tight, gathers slag agent at the upper perlite of placing of overall rare earth ferrosilicomagnesium nodulizing agent (2) of outer lining rectangular steel tube.
5. nodulizing process according to claim 1, is characterized in that adopting the identical structure that welding is combined side by side of more than 2 rectangular steel tube opening direction; Adopt the steel plate that is less than steel pipe thickness to control the initial reaction state of spheroidizing reacion with a part for the mode shutoff outer lining rectangular steel tube both ends open of welding at rectangular steel tube opening direction.
6. nodulizing process according to claim 1, it is characterized in that changing g in its spheroidizing step, cancel that after skimming, to adopt add-on 0.1% granularity≤5mm composition be that the composite inoculant of Mg3-6%, RE1-2%, 40-50%Si covers molten iron, change into and after skimming, close half clad (16) of rotation and insert the first fixed sleeving (20) locking with minor axis (22).
7. according to the nodulizing process described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that with rectangular steel pipe displacement rectangular steel tube.
8. according to the nodulizing process described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that being equipped with in overall magnesium ferrosilicon nodulizing agent (27) inside the lanthanum cerium mischmetal metal (28) of outer lining rectangular steel tube, the overall magnesium ferrosilicon nodulizing agent (27) of outer lining rectangular steel tube is identical with the direction that its alloy of lanthanum rare earth metal (28) of outer lining rectangular steel tube exposes opening, mode with welding is bound up the lanthanum cerium mischmetal metal (28) of outer lining rectangular steel tube and the compound outer lining rectangular steel tube (29) that holds overall magnesium ferrosilicon nodulizing agent (27), by overall magnesium ferrosilicon nodulizing agent (27) aluminium alloy melting be injected in compound outer lining rectangular steel tube (29), solidify cooling, between the rectangular steel tube of assembled arrangement that pours inoculant alloy liquid, set up cooling iron and inoculant alloy liquid upper cover iron plate is set, molten iron pours nodularization bag (1), after spheroidizing reacion starts, in being finally less than in reaction times of 50% of whole spheroidizing reacion process, the lanthanum cerium mischmetal metal (28) of outer lining rectangular steel tube starts to participate in spheroidizing reacion, effectively supplements required ree content.
9. according to the nodulizing process described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that being equipped with in overall magnesium ferrosilicon nodulizing agent inside the overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube, the overall magnesium ferrosilicon nodulizing agent of outer lining rectangular steel tube is identical with the direction that its alloy of overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube exposes opening, mode with welding is bound up the overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube and the compound outer lining rectangular steel tube that holds overall magnesium ferrosilicon nodulizing agent, by the overall magnesium ferrosilicon inoculant alloy liquid melting be injected in compound outer lining rectangular steel tube, solidify cooling, between the rectangular steel tube of assembled arrangement that pours inoculant alloy liquid, set up cooling iron and inoculant alloy liquid upper cover iron plate is set, molten iron pours nodularization bag (1), after spheroidizing reacion starts, in being finally less than in reaction times of 50% of whole spheroidizing reacion process, the overall rare earth magnesium ferrosilicon alloy of ree content≤33% of outer lining rectangular steel tube starts to participate in spheroidizing reacion, effectively supplements required ree content.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2012/000861 WO2013188993A1 (en) | 2012-06-21 | 2012-06-21 | Nodularization-processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102884210A CN102884210A (en) | 2013-01-16 |
| CN102884210B true CN102884210B (en) | 2014-06-25 |
Family
ID=47484669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280000506.1A Expired - Fee Related CN102884210B (en) | 2012-06-21 | 2012-06-21 | Spheroidizing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102884210B (en) |
| WO (1) | WO2013188993A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874771B (en) * | 2013-03-04 | 2015-05-13 | 天津市万路科技有限公司 | Balling processing method of nodular cast iron |
| CN103862004A (en) * | 2013-09-06 | 2014-06-18 | 天津市万路科技有限公司 | Molten iron treatment method |
| CN111218536A (en) * | 2020-01-14 | 2020-06-02 | 西安理工大学 | Spheroidizing treatment method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932061A (en) * | 2006-10-30 | 2007-03-21 | 刘年路 | Nodulizer producing process |
| CN1986860A (en) * | 2006-11-16 | 2007-06-27 | 江苏大学 | Cast iron nodulizer and nodulizing process |
| CN101029367B (en) * | 2007-04-17 | 2010-12-22 | 刘年路 | Spheroidizing treater |
| CN101579732B (en) * | 2009-06-25 | 2011-06-29 | 上海应用技术学院 | Spheroidisation reaction package for producing ductile cast iron and spheroidisation method therefor |
| CN201537693U (en) * | 2009-09-28 | 2010-08-04 | 河南欧迪艾铸造有限公司 | Ductile iron spheroidization processing package |
| CN102021468B (en) * | 2010-10-25 | 2013-01-23 | 天津市万路科技有限公司 | Smokeless spheroidizing method |
| CN102337446A (en) * | 2011-11-03 | 2012-02-01 | 广西玉林玉柴机器配件制造有限公司 | Bagging process for spheroidizing |
| CN102492890B (en) * | 2011-12-23 | 2013-12-25 | 天津市万路科技有限公司 | Low silicon nodularizer and application thereof |
| CN102492889B (en) * | 2011-12-23 | 2014-02-12 | 天津市万路科技有限公司 | Production and application of low silicon nodularizer |
-
2012
- 2012-06-21 WO PCT/CN2012/000861 patent/WO2013188993A1/en active Application Filing
- 2012-06-21 CN CN201280000506.1A patent/CN102884210B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013188993A1 (en) | 2013-12-27 |
| CN102884210A (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102021468B (en) | Smokeless spheroidizing method | |
| CN102851566A (en) | Nodulizing method | |
| CN103642976B (en) | A kind of smelting technology of H13 steel | |
| CN101407884A (en) | Smelting technique for cast of wind energy apparatus | |
| CN102690985A (en) | Spheroidizing method | |
| CN103433471A (en) | Spheroidizing method of nodular cast iron | |
| CN102884210B (en) | Spheroidizing method | |
| CN101029367B (en) | Spheroidizing treater | |
| CN102695810B (en) | Method for smelting, reducing, alloying and treating steel | |
| US4537629A (en) | Method for obtaining high purity ductile iron | |
| CN202824554U (en) | Spheroidizing device | |
| CN109371192A (en) | Spheroidal graphite cast-iron pours nodulizing process and spheroidising packet | |
| US20180202012A1 (en) | Method of making steel using a single installation, and installation | |
| CN202830134U (en) | Spheroidizing device | |
| CN105695856A (en) | Nodular cast iron for high-toughness driving axle housing of high-end load-bearing forklift and production method thereof | |
| CN103874771B (en) | Balling processing method of nodular cast iron | |
| CN104513879B (en) | Method for treating molten iron | |
| CN103862004A (en) | Molten iron treatment method | |
| CN201908123U (en) | Smokeless spheroidization device | |
| CN105177213A (en) | Pretreatment method of hot charged molten iron for casting | |
| CN115255294A (en) | Treatment process for producing high-strength and high-toughness nodular cast iron through green sand molding | |
| CN103146870A (en) | Spheroidal graphite cast iron spheroidizing method | |
| CN203526532U (en) | Spheroidizing device for spheroidal graphite cast iron | |
| CN106077534B (en) | Pig mold, preparation method and its bridging method | |
| Shamsuddin | Steelmaking |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221124 Address after: East of Yanbin Road, Feixian Economic Development Zone, Linyi City, Shandong Province Patentee after: Shandong jinjieli Material Technology Co.,Ltd. Address before: Room 201, gate 5, building 2, xiangyangli, Tanggu Central Road, Tianjin, 300450 Patentee before: TIANJIN WANLU TECHNOLOGY Co.,Ltd. Patentee before: Liu Nianlu Patentee before: Liu Changchen |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230714 Address after: No.8 Xinzhai Village, Chishi Town, Shenshan Special Cooperation Zone, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Jianeng New Environmental Protection Building Materials Co.,Ltd. Address before: 273400 east side of Yanbin Road, Feixian Economic Development Zone, Linyi City, Shandong Province Patentee before: Shandong jinjieli Material Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 |