CN102021468B - Smokeless spheroidizing method - Google Patents
Smokeless spheroidizing method Download PDFInfo
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- CN102021468B CN102021468B CN2010105174849A CN201010517484A CN102021468B CN 102021468 B CN102021468 B CN 102021468B CN 2010105174849 A CN2010105174849 A CN 2010105174849A CN 201010517484 A CN201010517484 A CN 201010517484A CN 102021468 B CN102021468 B CN 102021468B
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- spheroidizing
- rectangular steel
- iron
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- steel pipe
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- 238000000034 method Methods 0.000 title claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 72
- 239000010959 steel Substances 0.000 claims abstract description 72
- 229910052742 iron Inorganic materials 0.000 claims abstract description 55
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 49
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 48
- 239000011777 magnesium Substances 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 3
- 230000033228 biological regulation Effects 0.000 claims description 25
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 14
- 239000002054 inoculum Substances 0.000 claims description 8
- 239000002667 nucleating agent Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 21
- 229910052710 silicon Inorganic materials 0.000 abstract description 4
- APGROBRHKCQTIA-UHFFFAOYSA-N [Mg].[Si].[Fe] Chemical compound [Mg].[Si].[Fe] APGROBRHKCQTIA-UHFFFAOYSA-N 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 229910052702 rhenium Inorganic materials 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 9
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 3
- 229910019064 Mg-Si Inorganic materials 0.000 description 3
- 229910019406 Mg—Si Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical group [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution 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
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- 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
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- 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 smokeless spheroidizing method for producing nodular cast iron. The method comprises the steps of: digging a pressure-regulating through hole or pressure-regulating seam on the middle of one side of a rectangular or square steel tube, injecting the rare earth magnesium silicon iron spheroidizing agent alloy liquid, which contains Mg less than or equal to 20%, Si less than or equal to 65% and RE less than or equal to 3%, into the steel tube so as to solidify and cool, using a third bolt and nut on a stand column and a positioning scale as a first bolt linking support rod pressing head of a steering shaft on a pressing lever with a rotatable rotating shaft or using a hook head of a motor transmission lifting device to lift the support rod pressing head having a counterweight iron, fixing the rare earth magnesium silicon iron spheroidizing agent alloy liquid with the rectangular or square steel tube lined outside into a spheroidizing bag by utilizing the support rod pressing head, and controlling the precise time of spheroidizing reaction by pressing inside the bag so as to realize the spheroidizing treatment. The absorbing efficiency of Mg, Re and Si is high, the preparing process of the spheroidizing agent, the use process and the production environment are improved, the production cost is lowered and the product quality is increased.
Description
Technical field
The invention relates to production method and the spheroidization apparatus of nodulizing agent, more specifically say and adopt block rare earth ferrosilicomagnesium nodulizing agent to cooperate treatment unit to adopt the method for the smokeless spheroidizing of pouring Bao Neifa.
Background technology
In the enterprise that produces nodular iron casting, extensively adopt rare earth magnesium ferrosilicon alloy as nodulizing agent.The 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 the Bao Neifa spheroidizing take rare earth ferrosilicomagnesium as nodulizing agent, when tapping temperature more than 1480 ℃, spheroidizing wraps under the red heat bag state of continuous use, and Mg content is 〉=8% the time, and the spheroidizing reacion situation is aggravated with the rising of temperature, strong magnesium light occurs even cause molten iron to splash, the 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 descends.Traditional terms of settlement is 1. to add a certain amount of SiCa alloy to improve and contain Ca and measure to alleviate its explosive reaction when the melting nodulizing agent, increases the SiCa alloy production cost is increased.2. the Mg content in the nodulizing agent is controlled at about 8% or≤8% alleviate reaction.3. in rare earth magnesium ferrosilicon nodulizing agent drops into the dykes and dams of hot metal ladle, cover pig scrap thereon and beat real, also have in bag, add dead head, the reduction of bushel iron piece wrap in the molten iron temperature of reaction.4. after in bag, dropping into nodulizing agent and breeding 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 control magnesium alloy reaction, but reaction finishes, and the molten iron cooling is larger, and the molten iron surface scum is many, the stability of spheroidizing reacion is subjected 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 higher for the base iron sulphur content of high temperature liquid iron before nodularization of cupola melting, only take to improve the add-on of nodulizing agent and increase the content of RE and Ca in the nodulizing agent, and at present under the pyroprocessing situation with nodulizing agent in the content of Mg to increase be very limited again.
I have applied for that Chinese invention patent publication number CN101029367A name is called two patent applications that " spheroidization apparatus and spheriodization process thereof " and publication number CN101509084A name are called " production method of nodulizing agent ", solved and reacted violent when pouring the Bao Neifa spheroidizing, the problem that the effective element specific absorption is low, also solved the 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, in order all to put into rare earth ferrosilicomagnesium nodulizing agent and nucleating agent in the 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, is unfavorable for the absorption of effective element and the purification of molten iron.The time of control 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 the bag are easily dross, damage after spheroidizing, and these problems occurring will affect the stable of spheroidizing quality, also increase the workload of repairing hot metal ladle simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of smokeless nodulizing agent, cooperate spheroidization apparatus to solve the problem that reaction is violent when pouring the Bao Neifa spheroidizing, the 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, utilize rectangle or rectangular steel tube 13 to offer several pressure regulation through holes 17 or pressure regulation seam 19 at middle part, one side, should offer pressure regulation through hole 17 or pressure regulation seam 19 at the end face middle part of small area for rectangular steel pipe, contain Mg≤20% with what melt, containing Si≤65% is injected in the rectangle or rectangular steel tube 13 that offers pressure regulation through hole 17 or pressure regulation seam 19 with the rare earth ferrosilicomagnesium inoculant alloy liquid that contains RE≤3%, after it solidifies cooling, just obtained to have take rectangle or rectangular steel tube 13 as outer lining, the block nodulizing agent of both ends open, for further controlling the speed of response of tubing endosphere agent, the steel plate that employing equates with thickness of steel pipe is with the mode shutoff rectangle of welding or the part of rectangular steel tube 13 both ends opens, to reduce high temperature liquid iron with the contact surface of block nodulizing agent, reaction times and the response behaviour of control nodulizing agent; The spheroidization apparatus that adopts publication number CN101029367A name to be called " spheroidization apparatus and spheriodization process thereof " is provided with removable position and can fixes in required position in the spheroidizing bag pole pressure head 1, the pressure head bottom surface of pole pressure head 1 is a plane, pole pressure head 1 outer lining refractories partly is with Deformed Steel Bars, the skeleton that iron wire is welded, impact when pole pressure head 1 can stand the nodulizing agent fusing boiling vigorous reaction of the repeated stock of high temperature liquid iron and magnesium content≤20%, column in column and the Position Scale 6 and Position Scale are an integral body that is welded into, be provided with in the end of Position Scale and move up and down location 3, be hung with Balance Iron 5 at the other end of pressing thick stick 4.The nodulizing agent of outer lining rectangle or rectangular steel tube 13 is closely knit rectangular parallelepipeds, its small volume, the bursting point position of whole rare earth ferrosilicomagnesium nodulizing agent 14 fusing boiling reactions is lower, and the spheroidizing reacion that carries out of along continuous straight runs, is conducive to the absorption of effective element and the purification of molten iron.The spheroidizing bag can be built by laying into flat nodularization bag or the lower dam-type nodularization bag of dykes and dams, for flat nodularization bag, such as Fig. 1, Fig. 2 and shown in Figure 3, place in nodularization bag centre near the whole rare earth ferrosilicomagnesium nodulizing agent 18 of outer lining rectangle or rectangular steel tube being offered the one side of pressure regulation through hole 17, the whole rare earth ferrosilicomagnesium nodulizing agent 18 that pole pressure head 1 is pressed in outer lining rectangle or rectangular steel tube is top fixing, throws in the ferrosilicon nucleating agent near a side of bag wall.For the lower nodularization bag of dykes and dams, as shown in Figure 4 and Figure 5, the whole rare earth ferrosilicomagnesium nodulizing agent 18 of outer lining rectangle or rectangular steel tube is offered nodularization bag bag wall near the one side of pressure regulation through hole 17, the other end is close to dykes and dams and is placed, the whole rare earth ferrosilicomagnesium nodulizing agent 18 that pole pressure head 1 is pressed in outer lining rectangle or rectangular steel tube is top fixing, throws in the ferrosilicon nucleating agent at two ends and the close bag wall place of reaction mouth.Stitched 19 o'clock not offering pressure regulation through hole 17 or pressure regulation, after molten iron pours the nodularization bag, the nodulizing agent that is positioned at the whole rare earth ferrosilicomagnesium nodulizing agent 18 two-port places of outer lining rectangle or rectangular steel tube begins first to melt boiling reaction with after the high temperature liquid iron contact, subsequently the fusing the nodulizing agent boiling reaction time, because the lengthening of the degree of depth, the pressure of boiling reaction strengthens thereupon, Frequency downshift, the aggravation of molten iron boiling situation; Such as Fig. 3 and shown in Figure 6, after offering pressure regulation through hole 17 or pressure regulation seam 19, nodulizing agent fusing boiling reaction can be ejected by pressure regulation through hole 17 or pressure regulation seam 19, shortened the approach of nodulizing agent fusing boiling reaction, pressure is reduced, reaction condition tends towards stability.Learnt by experiment, when being 8～14mm, pressure regulation through hole 17 diameters all can obtain desirable effect, the wavelength width of a slit of pressure regulation seam 19 should be advisable at 2～4mm, when the processing molten iron temperature is higher, the port area of pressure regulation through hole 17 or pressure regulation seam 19 should be less, when the processing molten iron temperature was low, its port area should be larger.
Above-mentioned pole pressure head 1 can adopt the first bolt 8 of the 3rd bolt and the steering shaft 2 of nut 12 on the pressure thick stick 4 of rotating shaft rotation connects pole pressure heads 1 on column and the Position Scale 6 mode pole pressure head 1 to be placed on above the whole rare earth ferrosilicomagnesium nodulizing agent 18 of outer lining rectangular steel pipe and fix; Also can adopt the gib head 16 of motor drive driving motion weight handling equipment to suspend the pole pressure head 1 with balance weight iron 15 in midair, this pole pressure head 1 be above-mentioned on the column the first bolt 8 of the 3rd bolt and nut 12 steering shaft 2 on the pressure thick stick 4 of rotating shaft rotation connect on the basis of pole pressure heads 1, increased balance weight iron 15 at its pole pressure head 1, pole pressure head 1 is placed on above the whole rare earth ferrosilicomagnesium nodulizing agent 18 of outer lining rectangular steel pipe, after spheroidizing reacion finishes, pole pressure head 1 is left the nodularization bag.Because rectangle or rectangular steel tube 13 outward appearances rule are neat, to will adopt the ferro-silicon 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 after its opening up assembled arrangement, reason owing to rectangle or rectangular steel tube 13, accelerated the cooled and solidified of inoculant alloy liquid, reduced the Segregation of Chemical Composition of nodulizing agent, the whole inoculant alloy of outer lining rectangle or rectangular steel tube 13 does not need fragmentation and screening, is convenient to carrying and piles up.
Its spheroidizing step is as follows:
A, will be on request after the whole rare earth ferrosilicomagnesium nodulizing agent 18 of outer lining rectangle or rectangular steel tube puts into spheroidizing bag 7 and arrive predetermined positions, removable pole pressure head 1 pressed thereon and fix;
B, in the nodularization bag, 7 drop into the ferrosilicon nucleating agents;
C, molten iron pour nodularization bag 7 and carry out spheroidizing reacion;
After d, spheroidizing reacion finish, pole pressure head 1 is left nodularization bag 7.
Beneficial effect of the present invention: solved the problem that reaction is violent when pouring the Bao Neifa spheroidizing, the effective element specific absorption is low, the molten iron cooling is few, has realized without the smokeless spheroidizing of magnesium light.Can accurately control the spheroidizing reacion time, in the situation of＜30 ℃ of the molten iron temperature fluctuations of pouring, the spheroidizing reacion time, upper lower variation of tolerance was less than 5 seconds.With traditional Mg8% that contains, the nodulizing agent that contains RE5% and contain Si41% is with take rectangle or rectangular steel tube 13 as outer lining, the built-in Mg15% that contains, containing RE1% compares with the whole nodulizing agent that contains Si54%, namely adopt the outer lining rectangle of One-step production or electric furnace secondary remelting method production or the whole rare earth ferrosilicomagnesium nodulizing agent 18 of rectangular steel tube to compare with traditional rare earth ferrosilicomagnesium nodulizing agent, its products production cost can reduce by 14%～18%, contains outer lining rectangle or rectangular steel tube and can reduce by 10～15% than traditional nodulizing agent in interior whole rare earth ferrosilicomagnesium nodulizing agent 18 adding weight when spheroidizing; When after spheroidizing, needing to add nodulizing agent, the first bolt 8 of employing the 3rd bolt and nut 12 steering shaft 2 on the pressure thick stick 4 of rotating shaft rotation on column and the Position Scale 6 connects the mode of pole pressure heads 1 or adopts gib head 16 suspentions of motor drive driving motion weight handling equipment to have the mode of the pole pressure head 1 of balance weight iron 15, the whole rare earth ferrosilicomagnesium nodulizing agent 18 of the outer lining rectangle of required additional amount or rectangular steel tube is bound up on the bottom surface of pole pressure head 1 with iron wire and iron sheet, be pressed in the molten iron, replenish required effective element magnesium; Improved the production environment of nodulizing agent making processes and use procedure.Being called " spheroidization apparatus and spheriodization process thereof " with immediate Chinese invention patent publication number CN101029367A name compares, identical rare under the condition of magnesium ferrosilicon nodulizing agent chemical ingredients and identical spheroidization treatment temperature, the spheroidizing reacion time of whole rare earth magnesium ferrosilicon nodulizing agent 18 that is equipped with outer lining rectangle or rectangular steel tube is more accurate, shortened the time of smokeless spheroidizing reacion, the specific absorption of effective element Mg, RE and Si is high, when magnesium content needs on the low side are added after spheroidizing, can in time add.
Description of drawings:
Fig. 1 be will have the whole rare earth ferrosilicomagnesium nodulizing agent 18 of outer lining rectangular steel pipe cooperate and adopt on column and the Position Scale 6 the 3rd bolt and nut 12 to be placed in the plain base nodularization bag 7 sectional view for the mode of the first bolt 8 connection pole pressure heads 1 of the steering shaft 2 on the pressure thick stick 4 of rotating shaft rotation.
Fig. 2 has the whole rare earth Mg-Si nodularizer 18 of outer lining rectangle or rectangular steel tube and is pressed into the vertical view of pole pressure head 1 in plain base nodularization bag 7 interior inputs.
Fig. 3 has the whole rare earth Mg-Si nodularizer 18 of outer lining rectangle or rectangular steel tube and is pressed into the sectional view of pole pressure head 1 in plain base nodularization bag 7 interior inputs.
Fig. 4 has the whole rare earth Mg-Si nodularizer 18 of outer lining rectangle or rectangular steel tube and is pressed into the vertical view of pole pressure head 1 in dam-type nodularization bag 7 interior inputs.
Fig. 5 be will have the whole rare earth ferrosilicomagnesium nodulizing agent 18 of the outer lining rectangular steel pipe mode that cooperates gib head 16 suspentions of adopting the motor drive driving motion weight handling equipments to have the pole pressure head 1 of balance weight iron 15 be placed on sectional view in the dam-type nodularization bag 7.
Fig. 6, be the view that offers the whole rare earth ferrosilicomagnesium nodulizing agent 18 of the outer lining rectangle of pressure regulation seam 19 or rectangular steel tube.
Description of reference numerals: 1 is the pole pressure head, 2 is steering shaft, 3 for moving up and down the location, and 4 for pressing thick stick, and 5 is Balance Iron, 6 is column and Position Scale, 7 are the nodularization bag, and 8 is the first bolt, and 9 is the second bolt, 10 is the first bolt and nut, 11 is the second bolt and nut, and 12 is the 3rd bolt and nut, and 13 is rectangle or the rectangular steel tube of outer lining, 14 is whole rare earth ferrosilicomagnesium nodulizing agent, 15 is balance weight iron, and 16 is the gib head of weight handling equipment, and 17 are the pressure regulation through hole, 18 is the whole rare earth ferrosilicomagnesium nodulizing agent of outer lining rectangle or rectangular steel tube, 19 pressure regulation seams for offering at outer lining rectangle or rectangular steel tube.
Embodiment:
By reference to the accompanying drawings enforcement of the present invention is further described: reaction condition and the reaction times of 13 pairs of control of the rectangle of whole rare earth ferrosilicomagnesium nodulizing agent 14 outer linings or rectangular steel tube magnesium-rare earth have been played keying action; When adopting dam-type nodularization bag to carry out spheroidizing, because at the bottom of the dykes and dams nodularization bag bag, three the fire proofed wood charge levels in the bottom surface of dykes and dams and pole pressure head 1 are with its tight encirclement, another face has the covering of ferrosilicon nucleating agent, delayed the burn-off rate of outer lining rectangle or rectangular steel tube 13, therefore, the wall thickness of outer lining rectangle or rectangular steel tube 13 is chosen in the needs that 2～4mm just can satisfy spheroidizing, for spheroidization treatment temperature greater than 1480 ℃, the spheroidizing reacion time is when longer, when adopting plain base nodularization bag, select the wall thickness of higher limit, in case of necessity can be in the outside of outer lining rectangle or rectangular steel tube 13, the brushing refractory paint delays its fusing except two reactive end actinal surfaces.The material that above-mentioned used outer lining rectangle or rectangular steel tube 13 also can be selected cast iron adopts the method manufacturing of casting.Learnt that by experiment too short for preventing the spheroidizing time, reaction is too fierce, the height that whole rare earth ferrosilicomagnesium nodulizing agent 14 is placed in the spheroidizing bag is advisable with＜10cm, when surpassing 10cm, should select the structure of rectangular steel pipe, the size of rectangular steel pipe facet is answered≤10cm.The steel plate that above-mentioned used outer lining rectangle or rectangular steel tube 13 and adopting equates with thickness of steel pipe is straight carbon steel with the used material of a part of the mode shutoff rectangle of welding or rectangular steel tube 13 both ends opens and there is no coating.
Embodiment 1: carry out under the cold blast cupola melting condition, melting rate is 2 tons/hour, adopt the whole rare earth ferrosilicomagnesium nodulizing agent with outer lining rectangular steel pipe 18 shown in the accompanying drawing 1 to cooperate to adopt on column and the Position Scale 6 the 3rd bolt and nut 12 to be placed in the dam-type nodularization bag 7 for the mode of the first bolt 8 connection pole pressure heads 1 of the steering shaft 2 on the pressure thick stick 4 of rotating shaft rotation, it is 500kg that every bag is processed weight of molten iron, red heat bag continuous operation uses, the iron notch molten iron temperature is 1480 ℃, base iron sulphur content 0.062%, the whole rare earth ferrosilicomagnesium nodulizing agent 14 that does not comprise outer lining rectangular steel pipe 13 contains Mg16%, contain RE2% and contain Si54%, its weight that drops into whole rare earth ferrosilicomagnesium nodulizing agent 14 accounts for 1.05% of processed weight of molten iron, add 0.4% in the 72SiFe nucleating agent bag, secondary silicon barium breeds and adds 0.15%, do not cover iron filings and perlite, 80 seconds spheroidizing reacion time, for without magnesium light molten iron boiling reaction, spheroidizing reacion finishes sampling in rear 8 minutes 30 seconds, 2 grades of nodulizing grades.
Embodiment 2: carry out under the electrosmelting of intermediate frequency condition, adopt the whole rare earth ferrosilicomagnesium nodulizing agent with outer lining rectangular steel pipe 18 shown in the accompanying drawing 3 to cooperate to adopt on column and the Position Scale 6 the 3rd bolt and nut 12 to be placed in the plain base nodularization bag 7 for the mode of the first bolt 8 connection pole pressure heads 1 of the steering shaft 2 on the pressure thick stick 4 of rotating shaft rotation, it is 1000kg that every bag is processed weight of molten iron, electric furnace molten iron discharging temperature is 1530 ℃, base iron sulphur content 0.028%, whole rare earth ferrosilicomagnesium nodulizing agent 14 contains Mg15%, contain RE1% and contain Si54%, its weight that drops into whole rare earth ferrosilicomagnesium nodulizing agent 14 accounts for 1.0% of processed weight of molten iron, add 0.4% in the 72SiFe nucleating agent bag, secondary silicon barium breeds and adds 0.2%, do not covering in iron filings and the perlitic situation, the spheroidizing reacion time was at 1 minute and 56 seconds, for without magnesium light molten iron boiling reaction, spheroidizing reacion finishes sampling in rear 12 minutes, 2 grades of nodulizing grades.
Claims (10)
1. one kind about producing the smokeless spheroidizing method of spheroidal graphite cast iron, the first part of its feature is nodulizing agent: utilize rectangular steel pipe (13) to offer pressure regulation through hole (17) at middle part, one side, should offer pressure regulation through hole (17) at the end face middle part of small area for rectangular steel pipe, contain Mg≤20% with what melt, the rare earth ferrosilicomagnesium inoculant alloy liquid that contains Si≤65% and contain RE≤3% is injected in the rectangular steel pipe (13) that offers pressure regulation through hole (17) and solidifies cooling, pressure regulation through hole (17) diameter of offering at outer lining rectangular steel pipe (13) is 8～14mm, adopts the steel plate that equates with thickness of steel pipe to control reaction times and the response behaviour of nodulizing agent with the part of mode shutoff rectangular steel pipe (13) both ends open of welding; The second section of its feature is spheroidization apparatus: first bolt (8) of the steering shaft (2) on take column and upper the 3rd bolt of Position Scale (6) and nut (12) as the pressure thick stick (4) of rotating shaft rotation connects the mode of pole pressure head (1), its removable position of pole pressure head (1) also can be fixed in the desired position, the pressure head bottom surface of its pole pressure head (1) is a plane, and the outer lining refractories of pole pressure head (1) partly is the skeleton that is welded with Deformed Steel Bars, iron wire; Column in column and the Position Scale (6) and Position Scale are an integral body that is welded into, and are provided with in the end of Position Scale to move up and down location (3), are hung with Balance Iron (5) at the other end of pressing thick stick (4);
Its spheroidizing step is as follows:
A, on request the whole rare earth ferrosilicomagnesium nodulizing agent (18) of outer lining rectangular steel pipe is put into spheroidizing bag (7) and is arrived the predetermined position after, removable pole pressure head (1) pressed thereon and fixing;
B, in nodularization bag (7), drop into the ferrosilicon nucleating agent;
C, molten iron pour nodularization bag (7) and carry out spheroidizing reacion;
After d, spheroidizing reacion finish, pole pressure head (1) is left nodularization bag (7).
2. nodulizing process according to claim 1 is characterized in that described rectangular steel pipe (13) is preferably rectangular steel tube.
3. nodulizing process according to claim 1 is characterized in that adopting the ferro-silicon 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 the rectangular steel pipe (13).
4. nodulizing process according to claim 2 is characterized in that adopting the ferro-silicon 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 the rectangular steel tube (13).
5. nodulizing process according to claim 1 is characterized in that outer lining rectangular steel pipe (13) selects the material of cast iron, adopts the castmethod manufacturing.
6. nodulizing process according to claim 2 is characterized in that outer lining rectangular steel tube (13) selects the material of cast iron, adopts the castmethod manufacturing.
7. nodulizing process according to claim 1 is characterized in that outer lining rectangular steel pipe (13) and adopts the steel plate that equates with thickness of steel pipe to be straight carbon steel with the used material of a part of mode shutoff rectangular steel pipe (13) both ends open of welding there is no coating.
8. nodulizing process according to claim 1 and 2, the mode that it is characterized in that adopting gib head (16) suspention of motor drive driving motion weight handling equipment to have the pole pressure head (1) of balance weight iron (15) are replaced the mode of the first bolt (8) connection pole pressure head (1) of the steering shaft (2) on the pressure thick stick (4) that rotates for rotating shaft take column and upper the 3rd bolt of Position Scale (6) and nut (12) and are carried out spheroidizing.
9. nodulizing process according to claim 2, when it is characterized in that after spheroidizing, needing to add nodulizing agent, first bolt (8) of the steering shaft (2) of employing on take column and upper the 3rd bolt of Position Scale (6) and nut (12) as the pressure thick stick (4) of rotating shaft rotation connects the mode of pole pressure head (1), the whole rare earth ferrosilicomagnesium nodulizing agent (18) of the outer lining rectangular steel tube of required additional amount is bound up on the bottom surface of pole pressure head (1) with iron wire and iron sheet, be pressed in the molten iron, replenish required effective element magnesium.
10. nodulizing process according to claim 2, when it is characterized in that after spheroidizing, needing to add nodulizing agent, adopt gib head (16) suspention of motor drive driving motion weight handling equipment to have the mode of the pole pressure head (1) of balance weight iron (15), the whole rare earth ferrosilicomagnesium nodulizing agent (18) of the outer lining rectangular steel tube of required additional amount is bound up on the bottom surface of pole pressure head (1) with iron wire and iron sheet, be pressed in the molten iron, replenish required effective element magnesium.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105174849A CN102021468B (en) | 2010-10-25 | 2010-10-25 | Smokeless spheroidizing method |
| CN201180044387.5A CN103180474B (en) | 2010-10-25 | 2011-10-24 | Smokeless spheroidizing method |
| PCT/CN2011/001762 WO2012106837A1 (en) | 2010-10-25 | 2011-10-24 | Smokeless spheroidization processing method |
| US13/869,023 US20130239751A1 (en) | 2010-10-25 | 2013-04-23 | Method for producing nodular cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105174849A CN102021468B (en) | 2010-10-25 | 2010-10-25 | Smokeless spheroidizing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102021468A CN102021468A (en) | 2011-04-20 |
| CN102021468B true CN102021468B (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105174849A Expired - Fee Related CN102021468B (en) | 2010-10-25 | 2010-10-25 | Smokeless spheroidizing method |
| CN201180044387.5A Expired - Fee Related CN103180474B (en) | 2010-10-25 | 2011-10-24 | Smokeless spheroidizing method |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180044387.5A Expired - Fee Related CN103180474B (en) | 2010-10-25 | 2011-10-24 | Smokeless spheroidizing method |
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| Country | Link |
|---|---|
| US (1) | US20130239751A1 (en) |
| CN (2) | CN102021468B (en) |
| WO (1) | WO2012106837A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021468B (en) * | 2010-10-25 | 2013-01-23 | 天津市万路科技有限公司 | Smokeless spheroidizing method |
| CN102492888B (en) * | 2011-12-23 | 2013-12-25 | 天津市万路科技有限公司 | Vermiculizer and application thereof |
| 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 |
| CN102492891B (en) * | 2011-12-23 | 2014-04-09 | 天津市万路科技有限公司 | Production and application of vermiculizer |
| CN102399944A (en) * | 2011-12-29 | 2012-04-04 | 天津市万路科技有限公司 | Desulfurization treatment method for molten iron |
| WO2013188993A1 (en) * | 2012-06-21 | 2013-12-27 | 天津市万路科技有限公司 | Nodularization-processing method |
| CN110438283A (en) * | 2019-09-16 | 2019-11-12 | 黄石新兴管业有限公司 | A kind of leaching bar assembly of plunging spheroidization molten iron |
| CN111304398B (en) * | 2019-12-13 | 2021-09-07 | 河北翼辰实业集团股份有限公司 | Cast iron spheroidizing system |
| CN111014593B (en) * | 2020-03-04 | 2023-05-05 | 河南旭锐合金新材料制造有限公司 | Cover plate lifting control mechanism for ductile iron spheroidization and assembly operation method |
| CN112404372B (en) * | 2020-11-20 | 2021-12-14 | 国铭铸管股份有限公司 | Speed-controlled rotational flow spheroidizing method for nodular cast iron in ladle |
| CN112708729B (en) * | 2020-12-21 | 2022-06-17 | 湖州盛特隆金属制品有限公司 | Mechanism convenient to VD stove adds tombarthite alloy |
| CN113106324B (en) * | 2021-03-03 | 2022-03-04 | 新兴铸管股份有限公司 | Pressure magnesium adding device |
| CN113523205B (en) * | 2021-07-06 | 2023-10-13 | 武汉武重铸锻有限公司 | Spheroidizing inoculation method |
| CN114134395B (en) * | 2021-12-28 | 2024-02-06 | 新兴河北工程技术有限公司 | Pressurized spheroidizing device and method |
| CN114561507B (en) * | 2022-02-25 | 2023-11-17 | 锦州捷通铁路机械股份有限公司 | Method for regulating and controlling ferrite grain size of spheroidal graphite cast iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104261A (en) * | 1993-12-20 | 1995-06-28 | 天津市塘沽区铸造技术开发研究所 | Spheroidization apparatus and spheriodization process thereof |
| CN1113268A (en) * | 1993-12-20 | 1995-12-13 | 天津市塘沽区铸造技术开发研究所 | Fumeless spheroidization treatment technology for spheroidal-graphite cast iron and spheroidization treatment device thereof |
| CN101029367A (en) * | 2007-04-17 | 2007-09-05 | 刘年路 | Spheroidizing treater and process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20024185D0 (en) * | 2002-09-03 | 2002-09-03 | Elkem Materials | Process for making ductile iron |
| CN201908123U (en) * | 2010-10-25 | 2011-07-27 | 刘年路 | Smokeless spheroidization device |
| CN102021468B (en) * | 2010-10-25 | 2013-01-23 | 天津市万路科技有限公司 | Smokeless spheroidizing method |
-
2010
- 2010-10-25 CN CN2010105174849A patent/CN102021468B/en not_active Expired - Fee Related
-
2011
- 2011-10-24 WO PCT/CN2011/001762 patent/WO2012106837A1/en active Application Filing
- 2011-10-24 CN CN201180044387.5A patent/CN103180474B/en not_active Expired - Fee Related
-
2013
- 2013-04-23 US US13/869,023 patent/US20130239751A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104261A (en) * | 1993-12-20 | 1995-06-28 | 天津市塘沽区铸造技术开发研究所 | Spheroidization apparatus and spheriodization process thereof |
| CN1113268A (en) * | 1993-12-20 | 1995-12-13 | 天津市塘沽区铸造技术开发研究所 | Fumeless spheroidization treatment technology for spheroidal-graphite cast iron and spheroidization treatment device thereof |
| CN101029367A (en) * | 2007-04-17 | 2007-09-05 | 刘年路 | Spheroidizing treater and process |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012106837A8 (en) | 2012-09-20 |
| CN103180474B (en) | 2015-08-19 |
| US20130239751A1 (en) | 2013-09-19 |
| WO2012106837A1 (en) | 2012-08-16 |
| CN102021468A (en) | 2011-04-20 |
| CN103180474A (en) | 2013-06-26 |
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Assignee: Tangshan Weihao Magnesium Powder Co. Ltd. Assignor: Liu Nianlu Contract record no.: 2011120000188 Denomination of invention: Smokeless spheroidization processing method License type: Common License Open date: 20110420 Record date: 20110922 |
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