CN103451371B - Induction furnace molten steel covers blowing argon pouring technology and device - Google Patents
Induction furnace molten steel covers blowing argon pouring technology and device Download PDFInfo
- Publication number
- CN103451371B CN103451371B CN201310408547.0A CN201310408547A CN103451371B CN 103451371 B CN103451371 B CN 103451371B CN 201310408547 A CN201310408547 A CN 201310408547A CN 103451371 B CN103451371 B CN 103451371B
- Authority
- CN
- China
- Prior art keywords
- molten steel
- slag charge
- duricrust
- argon
- induction furnace
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of induction furnace molten steel and cover blowing argon pouring technology and device, after induction furnace molten steel completes deoxidation treatment and removes whole deoxidation slag, be sprinkled into slag charge toward molten steel surface, cover molten steel surface completely; Left standstill through 1 ~ 3 minute, form the slag charge duricrust covering molten steel surface; Perforate on slag charge duricrust, by Argon stainless steel tube outlet from this hole through stretch into molten steel surface and slag charge duricrust gap among, be blown into argon gas, and maintain positive air pressure; Before molten steel starts cast, the slag charge duricrust edge near tapping spout chisels or discloses and outputs steel hole; During molten steel cast, continue to be blown into argon gas among the gap between molten steel surface and slag charge duricrust, and maintain positive air pressure, until cast terminates.Form argon shield by the present invention on molten steel surface during the cast of induction furnace molten steel, considerably reduce the secondary oxidation of molten steel in burner hearth, significantly improve foundry goods cleanliness factor and inner quality, and whole process argon gas consumption is few, production cost is low.
Description
Technical field
The present invention relates to a kind of casting field, be specifically related to a kind of induction furnace molten steel and cover blowing argon pouring technology and device.
Background technology
Induction furnace be casting and field of metallurgy commonly use fusing and smelting equipment, mainly comprise inductor block, burner hearth, bell, come out of the stove and topple over hydraulic efficiency system, water-cooled cable or copper bar, induction power supply, cooling water system.Burner hearth is arranged in inductor block, and it is suitable for reading that bell is placed on burner hearth, and induction power supply passes through copper bar or water-cooled cable and inductor block and connects, and water coolant and induction power supply, inductor block, water-cooled cable or copper bar are connected.When fusing and iron and steel smelting, first start cooling water system, force water flowing cooling to induction power supply, water-cooled cable or copper bar, inductor block, and then start induction power supply, and to inductor block power transmission; When there is solid steel iron furnace material in burner hearth, the exchange current in inductor block can produce inductive emf in furnace charge, and inductive emf is converted into eddy current again, thus heating and melting solid steel iron furnace material, and then adjust temperature and the chemical composition of molten steel or iron liquid; When the temperature of molten steel or iron liquid and chemical composition meet the demands, just can remove bell, by the molten steel in burner hearth or iron liquid impouring casting ladle, or the molten steel in burner hearth or iron liquid directly be poured into casting mold, as precision-investment casting formwork etc.In order to ensure the slag charge in burner hearth not to be poured into casting mold, the liquid state of roof of the furnace or solid-state slag charge, when the molten steel in burner hearth or iron liquid are poured into casting mold, must all remove totally by induction furnace.But, such pouring operation can bring new secondary oxidation again, the oxidation of the molten steel namely in casting process or iron liquid, adds the non-metallic inclusion in foundry goods, be degrading the performance of foundry goods, especially all the more so for the stainless steel of easy secondary oxidation, high temperature steel, refractory alloy foundry goods.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of secondary oxidation that can obviously reduce in induction furnace molten steel and iron liquid casting process, the induction furnace molten steel of the cleanliness factor and inner quality that significantly improve foundry goods covers blowing argon pouring technology and device.
The present invention is achieved through the following technical solutions technical object.
A kind of induction furnace molten steel covers blowing argon pouring technology, and its improvements are: have following processing step:
A. induction furnace adds thermogenesis molten steel;
B. deoxidation treatment is completed to described molten steel, and remove whole deoxidation slag;
C. be sprinkled into the slag charge of 0.5 ~ 10kg toward described molten steel surface, cover described molten steel surface completely;
D. through 1 ~ 3 minute leave standstill, the lower floor's slag charge contacted with described molten steel is in semi-melting state, the upper strata slag charge simultaneously do not contacted with described molten steel sinters, and slag charge forms on described molten steel surface the slag charge duricrust that thickness is 2 ~ 30mm, covers described molten steel surface completely;
E. the hole larger than Argon stainless steel tube external diameter is chiseled or disclosed out to the described slag charge duricrust on described molten steel surface, described Argon stainless steel tube outlet is stretched among the gap described molten steel surface and described slag charge duricrust through described slag charge duricrust from this hole;
F. be constantly blown among the gap between described molten steel surface and described slag charge duricrust by argon gas by described Argon stainless steel tube, the air pressure maintained in gap is positive air pressure;
G. the described slag charge duricrust edge near induction furnace tapping spout chisels or discloses and outputs steel hole;
H. induction furnace is tilted to start cast, during cast, described molten steel flows to tapping spout from the tapping hole of described slag charge duricrust edge; Continue through described Argon stainless steel tube and be blown into argon gas among the gap between described molten steel surface and described slag charge duricrust, the air pressure maintained in gap is positive air pressure, until the cast of described molten steel terminates;
J., after being poured, closing argon bottle, remove described Argon stainless steel tube, remove described slag charge duricrust, start fusing and the smelting of next stove molten steel.
In above-mentioned technique, the composition (mass percent) of described slag charge duricrust is: SiO
260% ~ 75%, Al
2o
320% ~ 30%, MgO2% ~ 5%, CaO1% ~ 4%, ZrO0.5% ~ 1%, C<0.001%, FeO<0.002%.
In above-mentioned technique, in molten steel casting process, the ar pressure between described molten steel surface and slag charge duricrust in gap is 0.001 ~ 0.01MPa, flow is 2 ~ 200 liters/min.
In above-mentioned technique, the capacity of described induction furnace is 10 ~ 1000kg.
In above-mentioned technique, the time that described induction furnace molten steel covers blowing argon cast is 1 ~ 120 minute.
Implement a device for above-mentioned technique, be arranged on induction furnace top, described induction furnace comprises furnace body support, inductor block, burner hearth, tapping spout, has molten steel in burner hearth; Its improvements are: be provided with above described molten steel and cover molten steel upper surface and have the slag charge duricrust of certain interval with covering molten steel upper surface; Slag charge duricrust edge near induction furnace tapping spout is provided with tapping hole; The device that described enforcement induction furnace molten steel covers blowing argon pouring technology comprises Argon stainless steel tube, standing bolt, argon gas flexible pipe, gas meter, gas-pressure meter, argon bottle, and described Argon stainless steel tube, argon gas flexible pipe, gas meter, gas pressure regulation table, argon bottle are communicated with successively; Described Argon stainless steel tube is fixedly connected on the top outside furnace body support by standing bolt; Described slag charge duricrust is provided with the hole more bigger than Argon stainless steel tube external diameter, and the outlet of described Argon stainless steel tube is stretched in this hole and stretched among the gap molten steel surface and slag charge duricrust through slag charge duricrust.
In said apparatus, the outlet of Argon stainless steel tube is stretched into slag charge duricrust lower surface and is about 10mm place.
The present invention compared with prior art, has following positively effect:
1, form argon shield by the present invention on molten steel surface during the cast of induction furnace molten steel, the secondary oxygen considerably reducing molten steel in burner hearth significantly improves cleanliness factor and the inner quality of foundry goods.
2, implement induction furnace molten steel in the present invention and cover the apparatus structure of blowing argon pouring technology simply, be easy to realize.
3, the top of induction furnace molten steel is provided with slag charge duricrust, define the protective layer of molten steel, air outside induction furnace is difficult to enter this molten steel surface (between molten steel and slag charge duricrust, gap is positive air pressure in the process flowing into argon gas always), the argon gas be blown between molten steel and slag charge duricrust in gap is also easy to retain, only from the gap of junction Argon stainless steel tube and slag charge duricrust, tapping is flowed out in hole on a small quantity, with do not arrange compared with slag charge duricrust, the argon gas consumption that the present invention covers blowing argon pouring technology significantly reduces, significantly reduce the production cost of steel casting or steel ingot.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below with reference to the accompanying drawings and the invention will be further described in conjunction with the embodiments.
Induction furnace molten steel covers blowing argon pouring technology, has following processing step:
A. induction furnace 14 adds thermogenesis molten steel 10;
B. deoxidation treatment is completed to molten steel 10, and remove whole deoxidation slag;
C. be sprinkled into the slag charge of 0.5 ~ 10kg toward molten steel 10 surface, cover molten steel 10 surface completely;
D. through 1 ~ 3 minute leave standstill, lower floor's slag charge contact with molten steel 10 is in semi-melting state, and the upper strata slag charge simultaneously contact with molten steel 10 sinters, and slag charge is the slag charge duricrust 7 of 2 ~ 30mm at molten steel 10 surface formation thickness, and covering molten steel 10 is surperficial completely;
E. the hole larger than Argon stainless steel tube 1 external diameter is chiseled or disclosed out to the slag charge duricrust 7 on molten steel 10 surface, Argon stainless steel tube 1 is exported and stretches among the gap molten steel 10 surface and slag charge duricrust 7 through slag charge duricrust 7 from this hole;
F. be constantly blown among the gap between molten steel 10 surface and slag charge duricrust 7 by argon gas by Argon stainless steel tube 1, the air pressure maintained in gap is positive air pressure;
G. slag charge duricrust 7 edge near induction furnace 14 tapping spout 9 chisels or discloses and outputs steel hole 7.1;
H. induction furnace 14 is tilted to start cast, during cast, molten steel 10 flows to tapping spout 9 from the tapping hole 7.1 of slag charge duricrust 7 edge; Continue through Argon stainless steel tube 1 and be blown into argon gas among the gap between molten steel 10 surface and slag charge duricrust 7, the air pressure maintained in gap is positive air pressure, terminates until molten steel 10 is poured into a mould;
J., after being poured, closing argon bottle 6, remove Argon stainless steel tube 1, remove slag charge duricrust 7, start fusing and the smelting of next stove molten steel.
Implement the device of above-mentioned technique shown in accompanying drawing, be arranged on induction furnace 14 top, induction furnace 14 comprises furnace body support 13, inductor block 11, burner hearth 12, tapping spout 9, has molten steel 10 in burner hearth 12; Be provided with above molten steel 10 and cover molten steel 10 upper surface and have the slag charge duricrust 7 of certain interval with covering molten steel 10 upper surface; Slag charge duricrust 7 edge near induction furnace 14 tapping spout 9 is provided with tapping hole 7.1; The device implementing induction furnace molten steel covering blowing argon pouring technology comprises Argon stainless steel tube 1, standing bolt 2, argon gas flexible pipe 3, gas meter 4, gas-pressure meter 5, argon bottle 6, and Argon stainless steel tube 1, argon gas flexible pipe 3, gas meter 4, gas pressure regulation table 5, argon bottle 6 are communicated with successively; Argon stainless steel tube 1 is fixedly connected on the top outside furnace body support 13 by standing bolt 2; Slag charge duricrust 7 is provided with the hole larger than Argon stainless steel tube 1 external diameter, the outlet of Argon stainless steel tube 1 is stretched in this hole and is stretched among the gap molten steel 10 surface and slag charge duricrust 7 through slag charge duricrust 7, in the following example, the outlet of Argon stainless steel tube 1 is stretched into slag charge duricrust 7 lower surface and is about 10mm place.
When furnace body support 13 verts, open argon bottle 6, argon gas will enter gas pressure regulation table 5, gas meter 4, argon gas flexible pipe 3, Argon stainless steel tube 1 successively and also finally enter induction furnace molten steel 10 with in the gap, top of slag charge duricrust 7, molten steel 10 in burner hearth 12 will flow into tapping spout 9 by tapping hole 7.1, is finally poured in casting mold or ingot mold.
Embodiment 1: the induction furnace 14 utilizing capacity to be 100kg melts No. 45 carbon steel liquid; when the temperature of No. 45 carbon steel liquid 10 reaches 1580 DEG C; remove whole slags at burner hearth 12 top, then be sprinkled into the protection slag charge of 0.5kg, the composition (mass percent) of slag charge is: SiO
275%, Al
2o
320%, MgO2%, CaO1.998%, ZrO1%, C<0.001%, FeO<0.002%; Leave standstill 1 minute, the thickness of slag charge duricrust 7 is 2mm; When induction furnace 14 start to vert No. 45 carbon steel liquid 10 are poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 2 liters, argon gas is imported in the upper surface of No. 45 carbon steel liquid 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at No. 45 carbon steel liquid 10 upper surfaces, thus obviously reduce the secondary oxidation in the casting process of No. 45 carbon steel liquid 10; Within the covering blowing argon duration of pouring reaching 5 minutes, in No. 45 carbon steel liquid, the secondary oxidation amplitude of content of residual aluminum reduces 70%, and the void content of the Melt casting of No. 45 carbon steels declines 90%.
Embodiment 2: the induction furnace 14 utilizing capacity to be 100kg melts No. 45 carbon steel liquid, when the temperature of No. 45 carbon steel liquid 10 reaches 1580 DEG C, removes whole slags at burner hearth 12 top, then is sprinkled into the protection slag charge of 5kg, and the composition (mass percent) of slag charge is: SiO
275%, Al
2o
320%, MgO2%, CaO1.998%, ZrO1%, C<0.001%, FeO<0.002%; Leave standstill 3 minutes, the thickness of slag charge duricrust 7 is 30mm; When induction furnace 14 start to vert No. 45 carbon steel liquid 10 are poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.01MPa, the flow of adjustment gas measuring apparatus 4 is per minute 200 liters, argon gas is imported in the upper surface of No. 45 carbon steel liquid 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at No. 45 carbon steel liquid 10 upper surfaces, thus obviously reduce the secondary oxidation in the casting process of No. 45 carbon steel liquid 10; Within the covering blowing argon duration of pouring reaching 20 minutes, in No. 45 carbon steel liquid, the secondary oxidation amplitude of content of residual aluminum reduces 95%, and the void content of the Melt casting of No. 45 carbon steels declines 100%.
Embodiment 3: the induction furnace 14 utilizing capacity to be 1000kg melts No. 45 carbon steel liquid; when the temperature of No. 45 carbon steel liquid 10 reaches 1580 DEG C; remove whole slags at burner hearth 12 top, then be sprinkled into the protection slag charge of 10kg, the composition (mass percent) of slag charge is: SiO
275%, Al
2o
320%, MgO2%, CaO1.998%, ZrO1%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert No. 45 carbon steel liquid 10 are poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.005MPa, the flow of adjustment gas measuring apparatus 4 is per minute 150 liters, argon gas is imported in the upper surface of No. 45 carbon steel liquid 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at No. 45 carbon steel liquid 10 upper surfaces, thus obviously reduce the secondary oxidation in the casting process of No. 45 carbon steel liquid 10; Within the covering blowing argon duration of pouring reaching 120 minutes, in No. 45 carbon steel liquid, the secondary oxidation amplitude of content of residual aluminum reduces 60%, and the void content of the Melt casting of No. 45 carbon steels declines 98%.
Embodiment 4: the induction furnace 14 utilizing capacity to be 300kg melts the grade of steel of AISI304(AISIA) stainless steel molten steel; when the temperature of AISI304 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 3kg again, the composition (mass percent) of slag charge is: SiO
260%, Al
2o
330%, MgO5%, CaO4%, ZrO0.998%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 20mm; When induction furnace 14 start to vert AISI304 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.005MPa, the flow of adjustment gas measuring apparatus 4 is per minute 50 liters, argon gas is imported in the upper surface of AISI304 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at AISI304 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of AISI304 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 20 minutes, the secondary oxidation amplitude of AISI304 stainless steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of AISI304 stainless steel Melt casting.
Embodiment 5: the induction furnace 14 utilizing capacity to be 250kg melts the grade of steel of AISI304(AISIA) stainless steel molten steel; when the temperature of AISI304 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 1.5kg again, the composition (mass percent) of slag charge is: SiO
260%, Al
2o
330%, MgO5%, CaO4%, ZrO0.998%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert AISI304 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.005MPa, the flow of adjustment gas measuring apparatus 4 is per minute 30 liters, argon gas is imported in the upper surface of AISI304 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at AISI304 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of AISI304 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 10 minutes, the secondary oxidation amplitude of AISI304 stainless steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of AISI304 stainless steel Melt casting.
Embodiment 6: the induction furnace 14 utilizing capacity to be 10kg melts the grade of steel of AISI304(AISIA) stainless steel molten steel; when the temperature of AISI304 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 0.5kg again, the composition (mass percent) of slag charge is: SiO
260%, Al
2o
330%, MgO5%, CaO4%, ZrO0.998%, C<0.001%, FeO<0.002%; Leave standstill 1.5 minutes, the thickness of slag charge duricrust 7 is 20mm; When induction furnace 14 start to vert AISI304 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.005MPa, the flow of adjustment gas measuring apparatus 4 is per minute 5 liters, argon gas is imported in the upper surface of AISI304 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at AISI304 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of AISI304 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 1 minute, the secondary oxidation amplitude of AISI304 stainless steel molten steel interalloy element reduces 99%, can significantly improve cleanliness factor and the inner quality of AISI304 stainless steel Melt casting.
Embodiment 7: the induction furnace 14 utilizing capacity to be 150kg melts the grade of steel of AISI304(AISIA) stainless steel molten steel; when the temperature of AISI304 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
270%, Al
2o
324.498%, MgO4%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert AISI304 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 20 liters, argon gas is imported in the upper surface of AISI304 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at AISI304 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of AISI304 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 7 minutes, the secondary oxidation amplitude of AISI304 stainless steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of AISI304 stainless steel Melt casting.
Embodiment 8: the induction furnace fusing 0Cr17(German standard grade of steel utilizing capacity to be 150kg is 1.4016) stainless steel molten steel; when the temperature of 0Cr17 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
270%, Al
2o
324.498%, MgO4%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert 0Cr17 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 25 liters, argon gas is imported in the upper surface of 0Cr17 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at 0Cr17 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of 0Cr17 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 7 minutes, the secondary oxidation amplitude of 0Cr17 stainless steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of 0Cr17 stainless steel Melt casting.
Embodiment 9: the induction furnace 14 utilizing capacity to be 150kg melts the grade of steel of 06Cr25Ni20(AISIA for AISI310S) stainless steel molten steel; when the temperature of 06Cr25Ni20 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
270%, Al
2o
324.498%, MgO4%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert 06Cr25Ni20 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 25 liters, argon gas is imported in the upper surface of 06Cr25Ni20 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at 06Cr25Ni20 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of 06Cr25Ni20 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 7 minutes, the secondary oxidation amplitude of 06Cr25Ni20 stainless steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of 06Cr25Ni20 stainless steel Melt casting.
Embodiment 10: the induction furnace 14 utilizing capacity to be 150kg melts the grade of steel of 06Cr25Ni20(AISIA for AISI310S) stainless steel molten steel; when the temperature of 06Cr25Ni20 stainless steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
270%, Al
2o
324.498%, MgO4%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert 06Cr25Ni20 stainless steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 25 liters, argon gas is imported in the upper surface of 06Cr25Ni20 stainless steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at 06Cr25Ni20 stainless steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of 06Cr25Ni20 stainless steel molten steel 10; Within the covering blowing argon duration of pouring reaching 3 minutes, the secondary oxidation amplitude of 06Cr25Ni20 stainless steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of 06Cr25Ni20 stainless steel ingot.
Embodiment 11: it is 1.4832 that the induction furnace 14 utilizing capacity to be 150kg melts 25Cr20Ni14Si2(EU criteria grade of steel) high temperature steel molten steel; when the temperature of 25Cr20Ni14Si2 high temperature steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
270%, Al
2o
324.498%, MgO4%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert 25Cr20Ni14Si2 high temperature steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 25 liters, argon gas is imported in the upper surface of 25Cr20Ni14Si2 high temperature steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at 25Cr20Ni14Si2 high temperature steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of 25Cr20Ni14Si2 high temperature steel molten steel 10; Within the covering blowing argon duration of pouring reaching 7 minutes, the secondary oxidation amplitude of 25Cr20Ni14Si2 high temperature steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of 25Cr20Ni14Si2 high temperature steel Melt casting.
Embodiment 12: the ZG40Cr25Ni20Si2(EU criteria grade of steel that the induction furnace 14 utilizing capacity to be 150kg melts containing Nb is 1.4848+Nb) high temperature steel molten steel, when the temperature of the ZG40Cr25Ni20Si2 high temperature steel molten steel 10 containing Nb reaches 1600 DEG C, remove whole slags at burner hearth 12 top, be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
271%, Al
2o
324.498%, MgO3%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%, leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm, when induction furnace 14 start to vert the ZG40Cr25Ni20Si2 high temperature steel molten steel 10 containing Nb is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 25 liters, argon gas is imported in burner hearth 12 containing in the upper surface of ZG40Cr25Ni20Si2 high temperature steel molten steel 10 of Nb and the gap of slag charge duricrust 7, one deck argon shield air film is formed at ZG40Cr25Ni20Si2 high temperature steel molten steel 10 upper surface containing Nb, thus obviously reduce containing the secondary oxidation in the casting process of the ZG40Cr25Ni20Si2 high temperature steel molten steel 10 of Nb, within the covering blowing argon duration of pouring reaching 7 minutes, secondary oxidation amplitude containing the ZG40Cr25Ni20Si2 high temperature steel molten steel interalloy element of Nb reduces 90%, can significantly improve the cleanliness factor containing the ZG40Cr25Ni20Si2 high temperature steel Melt casting of Nb and inner quality.
Embodiment 13: the trade mark that the induction furnace 14 utilizing capacity to be 150kg melts experiment material association of W6Mo5Cr4V2(U.S. ASTM is M2) rapid steel molten steel; when the temperature of W6Mo5Cr4V2 rapid steel molten steel 10 reaches 1600 DEG C; remove whole slags at burner hearth 12 top; be sprinkled into the protection slag charge of 2kg again, the composition (mass percent) of slag charge is: SiO
271%, Al
2o
324.498%, MgO3%, CaO1%, ZrO0.5%, C<0.001%, FeO<0.002%; Leave standstill 2 minutes, the thickness of slag charge duricrust 7 is 15mm; When induction furnace 14 start to vert W6Mo5Cr4V2 rapid steel molten steel 10 is poured into precision-investment casting formwork time, the pressure of adjustment gas-pressure meter 5 is 0.001MPa, the flow of adjustment gas measuring apparatus 4 is per minute 25 liters, argon gas is imported in the upper surface of W6Mo5Cr4V2 rapid steel molten steel 10 in burner hearth 12 and the gap of slag charge duricrust 7, form one deck argon shield air film at W6Mo5Cr4V2 rapid steel molten steel 10 upper surface, thus obviously reduce the secondary oxidation in the casting process of W6Mo5Cr4V2 rapid steel molten steel 10; Within the covering blowing argon duration of pouring reaching 7 minutes, the secondary oxidation amplitude of W6Mo5Cr4V2 rapid steel molten steel interalloy element reduces 90%, can significantly improve cleanliness factor and the inner quality of W6Mo5Cr4V2 rapid steel Melt casting.
Claims (5)
1. induction furnace molten steel covers a blowing argon pouring technology, it is characterized in that: have following processing step:
A. induction furnace (14) adds thermogenesis molten steel (10);
B. deoxidation treatment is completed to described molten steel (10), and remove whole deoxidation slag;
C. be sprinkled into the slag charge of 0.5 ~ 10kg toward described molten steel (10) surface, cover described molten steel (10) surface completely;
D. through 1 ~ 3 minute leave standstill, the lower floor's slag charge contacted with described molten steel (10) is in semi-melting state, the upper strata slag charge simultaneously do not contacted with described molten steel (10) sinters, slag charge forms on described molten steel (10) surface the slag charge duricrust (7) that thickness is 2 ~ 30mm, covers described molten steel (10) surface completely;
E. the hole larger than Argon stainless steel tube (1) external diameter is chiseled or disclosed out to the described slag charge duricrust (7) on described molten steel (10) surface, described Argon stainless steel tube (1) outlet is stretched among the gap described molten steel (10) surface and described slag charge duricrust (7) through described slag charge duricrust (7) from this hole;
F. be constantly blown among the gap between described molten steel (10) surface and described slag charge duricrust (7) by argon gas by described Argon stainless steel tube (1), the air pressure maintained in gap is positive air pressure;
G. described slag charge duricrust (7) edge near induction furnace (14) tapping spout (9) chisels or discloses and outputs steel hole (7.1);
H. induction furnace (14) is tilted to start cast, during cast, described molten steel (10) flows to tapping spout (9) from the tapping hole (7.1) of described slag charge duricrust (7) edge; Continue through described Argon stainless steel tube (1) and be blown into argon gas among the gap between described molten steel (10) surface and described slag charge duricrust (7), the air pressure maintained in gap is positive air pressure, until described molten steel (10) cast terminates;
J., after being poured, closing argon bottle (6), remove described Argon stainless steel tube (1), remove described slag charge duricrust (7), start fusing and the smelting of next stove molten steel.
2. the induction furnace molten steel according to claims 1 covers blowing argon pouring technology, it is characterized in that: the composition (mass percent) of described slag charge duricrust (7) is: SiO
260% ~ 75%, Al
2o
320% ~ 30%, MgO2% ~ 5%, CaO1% ~ 4%, ZrO0.5% ~ 1%, C < 0.001%, FeO < 0.002%.
3. the induction furnace molten steel according to claims 1 covers blowing argon pouring technology; it is characterized in that: in molten steel casting process, the ar pressure between described molten steel (10) surface and slag charge duricrust (7) in gap is 0.001 ~ 0.01MPa, flow is 2 ~ 200 liters/min.
4. the induction furnace molten steel according to claims 1 covers blowing argon pouring technology, it is characterized in that: the capacity of described induction furnace (14) is 10 ~ 1000kg.
5. the induction furnace molten steel according to claims 1 covers blowing argon pouring technology, it is characterized in that: the time that described induction furnace molten steel covers blowing argon cast is 1 ~ 120 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408547.0A CN103451371B (en) | 2013-09-10 | 2013-09-10 | Induction furnace molten steel covers blowing argon pouring technology and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408547.0A CN103451371B (en) | 2013-09-10 | 2013-09-10 | Induction furnace molten steel covers blowing argon pouring technology and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103451371A CN103451371A (en) | 2013-12-18 |
| CN103451371B true CN103451371B (en) | 2016-01-20 |
Family
ID=49734202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310408547.0A Active CN103451371B (en) | 2013-09-10 | 2013-09-10 | Induction furnace molten steel covers blowing argon pouring technology and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103451371B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109750136A (en) * | 2019-01-11 | 2019-05-14 | 包头钢铁（集团）有限责任公司 | A kind of method that ladle molten steel standing prevents secondary oxidation in the process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6415849B1 (en) * | 1997-02-14 | 2002-07-09 | Voest-Alpine Industrieanlagenbau Gmbh | How to avoid contact between oxygen and molten metal |
| CN101067179A (en) * | 2007-06-07 | 2007-11-07 | 泰州金鼎精密铸造有限公司 | Bottom-blowing medium-frequency smelting furnace and in-furnace auxiliary refining method |
| CN200993526Y (en) * | 2006-12-07 | 2007-12-19 | 广州穗港兴铜缆制品有限公司 | Tiltable split power frequency induction furnace |
| CN101706205A (en) * | 2009-11-24 | 2010-05-12 | 苏州有色金属研究院有限公司 | Pressure-flow-type magnesium alloy smelting heat insulating furnace |
| CN201644737U (en) * | 2010-03-24 | 2010-11-24 | 宝山钢铁股份有限公司 | Argon sealing device for tundish |
| CN102923707A (en) * | 2012-11-09 | 2013-02-13 | 朱兴发 | Fusion vacuum processing furnace and productive technology used for producing of 6N grade solar-grade polycrystalline silicon |
-
2013
- 2013-09-10 CN CN201310408547.0A patent/CN103451371B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6415849B1 (en) * | 1997-02-14 | 2002-07-09 | Voest-Alpine Industrieanlagenbau Gmbh | How to avoid contact between oxygen and molten metal |
| CN200993526Y (en) * | 2006-12-07 | 2007-12-19 | 广州穗港兴铜缆制品有限公司 | Tiltable split power frequency induction furnace |
| CN101067179A (en) * | 2007-06-07 | 2007-11-07 | 泰州金鼎精密铸造有限公司 | Bottom-blowing medium-frequency smelting furnace and in-furnace auxiliary refining method |
| CN101706205A (en) * | 2009-11-24 | 2010-05-12 | 苏州有色金属研究院有限公司 | Pressure-flow-type magnesium alloy smelting heat insulating furnace |
| CN201644737U (en) * | 2010-03-24 | 2010-11-24 | 宝山钢铁股份有限公司 | Argon sealing device for tundish |
| CN102923707A (en) * | 2012-11-09 | 2013-02-13 | 朱兴发 | Fusion vacuum processing furnace and productive technology used for producing of 6N grade solar-grade polycrystalline silicon |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103451371A (en) | 2013-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102021488B (en) | Steel for nuclear-island seamless steel tube and production method thereof | |
| CN101333579B (en) | Method for producing tube blank steel for nuclear electricity | |
| CN105861951B (en) | Nickel and stainless steel super large-scale continuous casting billet manufacture method | |
| CN103882303B (en) | A kind of smelting process of gas protecting welding wire steel | |
| CN107350445B (en) | The production method of carburizing bearing steel G20Cr2Ni4 continuous cast round billets | |
| CN105018761A (en) | Continuous casting method for high-manganese and high-aluminum type austenite low-magnetic steel | |
| CN108660359A (en) | The continuous cast round billets production method of inexpensive ultra supercritical high-pressure boiler tube | |
| CN104278197B (en) | Smelting method of steel for low-silicon high-titanium welding wire | |
| CN105316558A (en) | Preparation method of boron-containing steel preventing casting blank corner cracking | |
| CN105537549B (en) | The production method of 100 DEG C of low temperature seamless steel pipe steel continuous cast round billets | |
| CN101220413A (en) | Technique for smelting ferroferrite with sponge iron | |
| CN104152632B (en) | The method of extra furnace dephosphorization smelted by a kind of intermediate frequency furnace | |
| CN111940716B (en) | Method for preventing rare earth steel continuous casting nozzle from being blocked | |
| CN103741023A (en) | Method for smelting non-magnetic steel | |
| CN107385311B (en) | The method for improving spheroidal graphite cast-iron melt iron degree of purity | |
| CN103451371B (en) | Induction furnace molten steel covers blowing argon pouring technology and device | |
| CN116422853B (en) | Die steel and continuous casting production method thereof | |
| CN204892930U (en) | Ladle | |
| CN104907540B (en) | A kind of method of the liquid pouring of electroslag continuous casting billet of strip steel water diverter | |
| CN116441501A (en) | Vacuum horizontal continuous casting and die casting device | |
| CN106756435B (en) | A kind of smelting process of welding wire steel | |
| CN208214296U (en) | A kind of composite plate blanks casting device | |
| CN203530361U (en) | Molten steel or molten iron argon blowing protection pouring device of induction furnace | |
| CN103938107A (en) | F91 high-heat-resistant steel and smelting method thereof | |
| CN215209586U (en) | System for refining high-purity high manganese steel |
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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 225505 hardware Road West, Jiangyan Development Zone, Jiangsu, Taizhou Patentee after: TAIZHOU XINYU PRECISION MANUFACTURE CO., LTD. Patentee after: University of Science and Technology Beijing Address before: 225505 hardware Road West, Jiangyan Development Zone, Jiangsu, Taizhou Patentee before: Taizhou XinYu Precision Casting Co., Ltd. Patentee before: University of Science and Technology Beijing |