CN203526485U - Vermicularizing treatment device for vermicular graphite cast iron - Google Patents
Vermicularizing treatment device for vermicular graphite cast iron Download PDFInfo
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- CN203526485U CN203526485U CN201320552144.9U CN201320552144U CN203526485U CN 203526485 U CN203526485 U CN 203526485U CN 201320552144 U CN201320552144 U CN 201320552144U CN 203526485 U CN203526485 U CN 203526485U
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- reative cell
- molten iron
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- baffle plate
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Abstract
A vermicularizing treatment device for vermicular graphite cast iron is characterized in that a vermicular agent comprising 15-50% of RE is contained in the middle inside a square steel pipe, wherein the vermicular agent accounts for 15-40% of the total weight of various alloys; molten iron treating agents are contained at the two ends adjacent to the square steel pipe, wherein the molten iron treating agents comprise 12-16% of Mg, 54-65% of Si and smaller than 3% of Ca; after the powdery molten iron treating agent materials accounting for 50% of the total alloy weight of the molten iron treating agent alloys required inside the square steel pipe are mechanically stirred and evenly mixed, a press machine is adopted to compress one end of the square steel pipe, the vermicular agent blocky alloys accounting for 15-40% of the total weight of the various alloys inside the square steel pipe are placed at the upper portion of the powdery molten iron treating agents compressed by the press machine inside the square steel pipe, and the rest of the powdery molten iron treating agents accounting for 50% of the total alloy weight of the molten iron treating agent alloys are placed at the remaining space at the upper end of the square steel pipe and compressed by the press machine to obtain the required vermicular agent; vermicularizing treatment is carried out in a bag punching-in method in cooperation with the vermicularizing treatment device.
Description
Technical field
The utility model is about wriggling of vermicular cast iron treating apparatus.Specifically, in the rectangular steel tube of two end openings, its two end openings position is equipped with hot metal treating agent, and position is equipped with the whole vermiculizer of low magnesium rare earth ferrosilicon therebetween, coordinates wriggling treating apparatus to adopt and pours the wriggling processing that Bao Neifa carries out.
Background technology
The cast iron that contains quasiflake graphite is studied and is applied as formal engineering material, and China and the foreign same period, drop into commercial Application early than abroad, advanced in the world to the research of the iron of wriggling, production and application level.Most factory all adopts cupola melting and produces without pretreatment the ironware of wriggling, and is the nodulizing rate of the ironware that guarantees to wriggle, and in vermiculizer, RE content is higher, and what have has reached RE content 15～35%; When wriggling processed, first effective element RE is used to purifying molten iron, and it is real wriggles and turn the later stage that is used in processing procedure into and just start.Rare earth resources has been classified the strategic resource of China as, must reduce its yield and reasonably use.
Applicant has applied for Chinese invention patent " production of vermicular cast iron vermiculizer and application thereof " on March 4th, 2013, the wriggling reative cell that utilization is built in wriggling pack processing, whole vermiculizer is put in wriggling reative cell, rely on the charge door of arch brick and wriggling of band steel sealing reative cell, whole vermiculizer is limited in the reative cell of nodularization bag, the magnesium vapor producing during wriggling reaction is by the lower reaction mouthful of reserving, middle reaction gap, upper reaction gap is to external diffusion, after having solved whole rare earth ferrosilicomagnesium nodulizer melting loss, move the problem floating, solved to pour and when wriggling of Bao Neifa processed, reacted violent molten iron and splash, the problem that effective element absorptivity is low, when the chemical composition of processed molten iron and processed weight of molten iron change, can adjust at any time the addition of nodulizer.Its weak point is that the operational sequence reinforced and sealing charge door of the vermiculizer in production scene is more loaded down with trivial details, after reative cell charge door place dross, affects follow-up operation, is not suitable for large batch of continuous production.
Summary of the invention
The purpose of this utility model is to provide a kind of novel vermiculizer, the low problem of effective element absorptivity such as RE while coordinating wriggling treating apparatus to solve to pour the processing of wriggling of Bao Neifa, reduce the consumption of RE, realize and accurately control the wriggling reaction time, stablize and improve the quality of products, reduce production costs, give full play to and utilize resource.
For achieving the above object, utilize rectangular steel tube to be equipped with the vermiculizer containing Mg2～5%, RE15～50%, Si55～65%, Ca1.5～5%, Al1～5% that accounts for various alloy gross weights 15～40% in the middle part of portion within it, be equipped with containing Mg12～16%, Si54～65%, Ca<3% by the powdered iron water treatment agent of forcing press compacting with two ends near it.
Its preparation method is: utilize rectangular steel tube to be equipped with the vermiculizer containing Mg2～5%, RE15～50%, Si55～65%, Ca1.5～5%, Al1～5% that accounts for various alloy gross weights 15～40% in the middle part of portion within it, be equipped with the hot metal treating agent containing Mg12～16%, Si54～65%, Ca<3% with two ends near it, hot metal treating agent preparation method is for containing Mg12～16% by composition, Si54～65%, the remaining alloy being melting into for iron of Ca<3% is broken into powdery, by 50% of powdered iron water treatment agent gross weight required in rectangular steel tube, adopt forcing press to be compacted to one end of rectangular steel tube, by the composition that accounts for various alloy gross weights 15～40% in rectangular steel tube, it is Mg2～5%, RE15～50%, Si55～65%, Ca1.5～5%, the vermiculizer bulk alloy of Al1～5% is placed in rectangular steel tube by the powdered iron water treatment agent top of forcing press compacting, remaining space is in the top remained 50% powdered iron water treatment agent and is placed in rectangular steel tube and is by the hot metal treating agent mid portion without RE of forcing press compacting, to be the whole rare earth ferrosilicomagnesium vermiculizer of the outer lining rectangular steel tube of vermiculizer with just having obtained two end portions after forcing press compacting, novel whole vermiculizer pours after ladle at molten iron, in course of reaction is to be in earlier stage by composition: the hot metal treating agent containing Mg12～16%, Si54～65%, Ca<3% participates in reaction, reached the effect of purifying molten iron, processed sulfur content of hot metal is dropped to below 0.03%, now the vermiculizer of mid portion starts to participate in reaction, makes the absorption that is fully utilized of RE element.Due to the effect of outer lining rectangular steel tube, guaranteed course of reaction stage by stage, the variation of processed molten iron temperature does not affect the whole processing reaction time.
As shown in Fig. 1 to Fig. 3 in Figure of description, build the molten iron pack processing of the chamber that responds by laying bricks or stones: at the end of molten iron pack processing, built left vertical plane baffle plate and right vertical plane baffle plate by laying bricks or stones, in the top level of left vertical plane baffle plate and right vertical plane baffle plate, built semicircle shape reative cell upper cover plate by laying bricks or stones; Vertical plane at reative cell is provided with one or more reative cell charge doors, the opening direction of reative cell charge door is in the face of the position at nodularization bag Bao Zui place, the upper end of a charge door offers relief groove therein, the upper end of relief groove is concordant with semicircle shape reative cell upper cover plate, the outer vertical of left vertical plane baffle plate and right vertical plane baffle plate is concordant with the vertical plane of semicircle shape reative cell upper cover plate, after the molten iron pack processing constructing is dried, for wriggling, processes.A kind of wriggling treating apparatus of vermicular cast iron, the first of its feature is the whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube: the middle part in rectangular steel tube inside is equipped with vermiculizer, be equipped with not containing the hot metal treating agent of rare earth with two ends near it, adopt forcing press to be compacted into as a whole; The second portion of its feature is molten iron pack processing: the second portion of its feature is in the bottom of molten iron pack processing, to have built left vertical plane baffle plate and right vertical plane baffle plate by laying bricks or stones, in the top level of left vertical plane baffle plate and right vertical plane baffle plate, has built semicircle shape reative cell upper cover plate by laying bricks or stones; Vertical plane at reative cell is provided with one or more reative cell charge doors, the opening direction of reative cell charge door is in the face of the position at nodularization bag Bao Zui place, the upper end of a reative cell charge door offers relief groove therein, the upper end of relief groove is concordant with semicircle shape reative cell upper cover plate, and the outer vertical of left vertical plane baffle plate and right vertical plane baffle plate is concordant with the vertical plane of semicircle shape reative cell upper cover plate; After being dried, the molten iron pack processing constructing processes for wriggling.
According to theory, calculate and actual measurement is learnt and be take its wall thickness of rectangular steel tube 100 * 100mm during as 4.5mm length as 230mm, built-in whole rare earth ferrosilicomagnesium nodulizer is containing Mg15%, containing RE1%, Si54%, the whole rare earth ferrosilicomagnesium nodulizer weight of its outer lining rectangular steel tube is 8.70kg, the proportion of the whole rare earth ferrosilicomagnesium nodulizer of outer lining rectangular steel tube is 3.78 grams/cm3, without the proportion of the whole rare earth ferrosilicomagnesium nodulizer of outer lining rectangular steel tube, is 2.97 grams/cm
3, molten iron proportion is with 7 grams/cm
3calculate, while processing 1000kg molten iron, add the buoyancy of the whole rare earth ferrosilicomagnesium nodulizer of outer lining rectangular steel tube to be:
23×10×10=2300(cm
3)， 2300×(7-3.78)=7.4(kg)。
Buoyancy without the whole rare earth ferrosilicomagnesium nodulizer of outer lining rectangular steel tube is:
23×9.1×9.1=1904.63(cm
3)， 1904.63×(7-2.97)=7.676(kg)。
The buoyancy that above-mentioned two kinds of nodulizers produce when spheroidizing reacion is along with its volume of increase of spheroidizing reacion time reduces gradually, and buoyancy also reduces.
Utilize the reaction chamber structure of above-mentioned molten iron pack processing, the easy floating phenomenon of vermiculizer while having prevented molten iron reaction, therefore the proportion of above-mentioned vermiculizer itself can be lower than the proportion of traditional vermiculizer, select suitable magnesium silicon significantly to improve again the magnesium content in vermiculizer than the fusing point that can increase vermiculizer, except containing Fe amount that ferrosilicon itself is brought into, do not need additionally to add steel scrap, thus in above-mentioned vermiculizer effective element Mg, the Si of wriggling processing reaction and the total content of RE higher.
Utilize the reaction chamber structure of above-mentioned molten iron pack processing that the required vermiculizer of weight that adds is first dropped into reative cell, then 72 ferrosilicon inovulants are placed on to reative cell; Because vermiculizer is placed in reative cell, reative cell charge door and relief groove be the unique passage that pours molten iron in bag, the 72 ferrosilicon inovulants that pile up at reative cell charge door place have further hindered molten iron and have entered reative cell; So molten iron reaction just formally starts after the molten iron that enters molten iron pack processing surpasses reative cell cover plate end face certain altitude.Except reative cell charge door and relief groove, the injection of the high pressure magnesium vapor producing during the entering and react of high temperature liquid iron does not have the approach of other convective exchange, and the ferrosilicon inovulant in reative cell has been increased the silicon content of reative cell inner metal liquid when reaction by fusing progressively; The structural design of reative cell has played the effect in decompression storehouse, the effect that the high pressure magnesium vapor having produced while having realized molten iron reaction discharges after step-down in decompression storehouse again; The absorptivity of vigorous reaction, raising magnesium and RE when the combination of above-mentioned factor is reacted stabilizing vermiculizer has played key effect; Reative cell charge door and relief groove the effective state of having controlled molten iron reaction is set, the magnesium vapor producing while forcing molten iron reaction spreads along nodularization bag bottom level direction, the easy floating phenomenon of vermiculizer when the plate washer of reative cell vertical plane has effectively prevented molten iron reaction, above-mentioned favorable factor has improved the absorptivity of magnesium and RE significantly.
The whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube can effectively be controlled the time of wriggling reaction.
Utilize the reaction chamber structure of above-mentioned molten iron pack processing, in order to improve the utilization rate of rare earth element, utilize outer lining rectangular steel tube, the rare earth ferrosilicon of lanthanum cerium mischmetal metal or ree content≤50% is placed on to the middle part of outer lining rectangular steel tube, the mg-si master alloy pruinescence forcing press compacting at outer lining rectangular steel tube two ends, selection is placed on the rare earth ferrosilicomagnesium of lanthanum cerium mischmetal metal or ree content≤50% at the middle part of outer lining rectangular steel tube, the mode of the mg-si master alloy pruinescence forcing press compacting at outer lining rectangular steel tube two ends adds rare earth element in reative cell, and cooperation will be without outer lining steel pipe, without RE composition containing Mg≤20%, containing the magnesium Antaciron of Si≤70%, add and in reative cell, carry out molten iron processing, molten iron pours the reative cell of molten iron pack processing (1), after molten iron reaction starts, being finally less than in reaction time of 50% of whole molten iron course of reaction, lanthanum cerium mischmetal metal in outer lining rectangular steel tube or the rare earth magnesium ferrosilicon alloy of ree content≤50% start to participate in wriggling reaction, effectively supplement required ree content.
Utilize the reaction chamber structure of above-mentioned molten iron pack processing, wriggling treatment step is as follows:
A, the whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube is put in the reative cell of molten iron pack processing;
B, ferrosilicon inovulant is put in the reative cell of molten iron pack processing, ferrosilicon inovulant is deposited in reative cell charge door place;
C, molten iron pour the reaction of wriggling of molten iron pack processing;
D, molten iron reaction are skimmed after finishing, and adopting addition 0.1% granularity≤5mm composition is the composite inoculant covering molten iron of Mg3-6%, RE1-2%, 40-50%Si.
The molten iron pack processing with reaction chamber structure as above, for reducing molten iron cooling after treatment and preventing the escape of effective element, adds covering clad in molten iron pack processing upper end.
The beneficial effects of the utility model: the many problems of RE element consumption when having solved traditional vermiculizer and pouring wriggling of Bao Neifa and process, novel vermiculizer is higher than traditional vermiculizer absorptivity, its addition of processing molten iron can reduce 30%-40%, the consumption of RE element can reduce by 50%, having realized wriggling processing molten iron cost significantly reduces, because it has accurately controlled its reaction time and reactiveness, to improving the quality of products, played positive role.
Accompanying drawing explanation:
Fig. 1 is the cutaway view that the whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube packs the ladle of building the chamber that responds by laying bricks or stones into.
Fig. 2 is the top view that the whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube packs the ladle of building the chamber that responds by laying bricks or stones into.
Fig. 3 is the cutaway view that the whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube packs the A-A direction of the ladle of building the chamber that responds by laying bricks or stones into.
Description of reference numerals: 1 is molten iron pack processing, 2 is left vertical plane baffle plate, 3 are and right vertical plane baffle plate, 4 is semicircle shape reative cell upper cover plate, and 5 is reative cell charge door, and 6 is relief groove, 7 is molten iron pack processing bag mouth, and 8 is the whole rare earth ferrosilicomagnesium vermiculizer of outer lining rectangular steel tube.
The specific embodiment
In the wriggling processing method of above-mentioned vermicular cast iron without outer lining steel pipe, without RE composition containing Mg≤20%, the production method that contains the magnesium Antaciron of Si≤70% is to adopt the Antaciron liquid One-step production magnesium Antaciron liquid of mine heat furnace smelting or the mode of electric furnace secondary remelting method production magnesium Antaciron liquid to produce the whole magnesium Antaciron without outer lining steel pipe of above-mentioned specification, magnesium Antaciron liquid is poured in the model that is its four sides, interval by cooling iron, treat that aluminium alloy solidifies, after cooling, just obtained the whole magnesium Antaciron without outer lining steel pipe of required weight, above its model, be provided with aluminium alloy upper cover plate, when magnesium Antaciron liquid is poured into a mould, effectively limited the exposed area of magnesium Antaciron liquid upper surface, after pouring, with upper cover foundary weight, the magnesium Antaciron fluid-tight exposing is closed, magnesium Antaciron liquid is rapid cooled and solidified under closed state, has reduced the Segregation of Chemical Composition of magnesium Antaciron.
The wriggling treating apparatus of above-mentioned vermicular cast iron, the whole rare earth ferrosilicomagnesium vermiculizer 8 of the outer lining rectangular steel tube of required weight is put into the mode in reative cell: 1. can be by molten iron pack processing 1 90-degree rotation angle, by reative cell charge door 5 upward, with long handle feeding tool, above-mentioned nodulizer is added smoothly in the reative cell of molten iron pack processing 1; 2. molten iron pack processing 1 is not rotated, and adopts special-purpose fixture and instrument that above-mentioned nodulizer is placed in the reative cell of molten iron pack processing 1.
The wriggling treating apparatus of above-mentioned vermicular cast iron, the left vertical plane baffle plate 2 of molten iron pack processing 1 reative cell, right vertical plane baffle plate 3 and semicircle shape reative cell upper cover plate 4 adopt refractory fireclay block to build, more than can continuous balling when high temperature liquid iron spheroidising processing 35 bags time, because chamber designs is reasonable, clean without dross in reative cell after molten iron is processed.Entrust refractory material factory that left vertical plane baffle plate 2, right vertical plane baffle plate 3 and semicircle shape reative cell upper cover plate 4 are merged into a single whole and be processed into the refractory brick of required geomery, also left vertical plane baffle plate 2, right vertical plane baffle plate 3 and semicircle shape reative cell upper cover plate 4 can be manufactured respectively to the refractory brick of required geomery; Select the refractory material of clay brick, high silica brick, high magnesia brick to make the assembly of left vertical plane baffle plate 2, right vertical plane baffle plate 3 and semicircle shape reative cell upper cover plate 4; Or select the refractory material of clay brick, high silica brick, high magnesia brick to make respectively left vertical plane baffle plate 2, right vertical plane baffle plate 3 and semicircle shape reative cell upper cover plate 4.
For processed molten iron temperature, be greater than 1480 ℃, when ladle is processed continuously red heat bag state, hot metal treating agent composition in outer lining rectangular steel tube is: magnesium content takes off limit value, silicon content capping value, calcium content capping value, can control the situation that molten iron reacts effectively, when lower for the pouring temperature of producing foundry goods, its magnesium content capping value, silicon content and calcium content take off limit value.
The even ripple disable of composition in order to ensure the whole rare earth ferrosilicomagnesium vermiculizer of each exert pressure consolidation outer lining rectangular steel tube, adopt each independently the vermiculizer in outer lining rectangular steel tube after batching, carry out again mechanical uniform mixing separately, after mixing, adopt 100 tons or 360 tons of forcing press compactings in batches.The vermiculizer chemical composition that guarantees same specification outer lining rectangular steel tube is identical, segregation-free.The wall thickness of outer lining rectangular steel tube is chosen in 2～4mm just can meet the needs that molten iron is processed.
Because the fusing point of 75 ferrosilicon is 1300 ℃, the fusing point of 72 ferrosilicon is 1280 ℃, the fusing point of 65 ferrosilicon is 1250 ℃, the fusing point of 50 ferrosilicon is 1220 ℃, therefore, selection drops into reative cell as inovulant with the approaching ferrosilicon of the fusing point of the whole rare earth ferrosilicomagnesium vermiculizer 8 of outer lining rectangular steel tube, the pressure of the magnesium vapor producing in the time of can effectively reducing molten iron reaction; When the whole rare earth ferrosilicomagnesium vermiculizer 8 of the outer lining rectangular steel tube of selection low melting point carries out molten iron processing, in reative cell, drop into 50 ferrosilicon preferably as inovulant.
Above-mentioned wriggling treating apparatus, adopting rectangular steel pipe is the outer liner tube displacement rectangular steel tube of whole rare earth ferrosilicomagnesium vermiculizer.
Claims (4)
1. the wriggling treating apparatus of a vermicular cast iron, the first of its feature is the whole rare earth ferrosilicomagnesium vermiculizer (8) of outer lining rectangular steel tube: the middle part in rectangular steel tube inside is equipped with vermiculizer, be equipped with not containing the hot metal treating agent of rare earth with two ends near it, adopt forcing press to be compacted into as a whole; The second portion of its feature is molten iron pack processing: the second portion of its feature is in the bottom of molten iron pack processing (1), to have built left vertical plane baffle plate (2) and right vertical plane baffle plate (3) by laying bricks or stones, in the top level of left vertical plane baffle plate (2) and right vertical plane baffle plate (3), has built semicircle shape reative cell upper cover plate (4) by laying bricks or stones; Vertical plane at reative cell is provided with one or more reative cell charge doors (5), the opening direction of reative cell charge door (5) is in the face of the position at nodularization bag bag mouth (7) place, the upper end of a reative cell charge door (5) offers relief groove (6) therein, the upper end of relief groove (6) is concordant with semicircle shape reative cell upper cover plate (4), and the outer vertical of left vertical plane baffle plate (2) and right vertical plane baffle plate (3) is concordant with the vertical plane of semicircle shape reative cell upper cover plate (4); After being dried, the molten iron pack processing (1) constructing processes for wriggling.
2. the wriggling of vermicular cast iron treating apparatus according to claim 1, is characterized in that the left vertical plane baffle plate (2) of spheroidising bag (I) reative cell, right vertical plane baffle plate (3) and semicircle shape reative cell upper cover plate (4) to merge into a single whole and be processed into the refractory fireclay block of required geomery.
3. the wriggling of vermicular cast iron treating apparatus according to claim 1, is characterized in that adopting the refractory material of refractory fireclay block to make respectively left vertical plane baffle plate (2), right vertical plane baffle plate (3) and semicircle shape reative cell upper cover plate (4).
4. the wriggling of vermicular cast iron treating apparatus according to claim 1, is characterized in that take the outer liner tube displacement rectangular steel tube that rectangular steel pipe is whole rare earth ferrosilicomagnesium vermiculizer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320552144.9U CN203526485U (en) | 2013-09-06 | 2013-09-06 | Vermicularizing treatment device for vermicular graphite cast iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320552144.9U CN203526485U (en) | 2013-09-06 | 2013-09-06 | Vermicularizing treatment device for vermicular graphite cast iron |
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| CN201320552144.9U Expired - Fee Related CN203526485U (en) | 2013-09-06 | 2013-09-06 | Vermicularizing treatment device for vermicular graphite cast iron |
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Granted publication date: 20140409 Termination date: 20140906 |
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