CN101634524B - Casting method of electric furnace water cooling cast steel furnace cover - Google Patents
Casting method of electric furnace water cooling cast steel furnace cover Download PDFInfo
- Publication number
- CN101634524B CN101634524B CN2009100273652A CN200910027365A CN101634524B CN 101634524 B CN101634524 B CN 101634524B CN 2009100273652 A CN2009100273652 A CN 2009100273652A CN 200910027365 A CN200910027365 A CN 200910027365A CN 101634524 B CN101634524 B CN 101634524B
- Authority
- CN
- China
- Prior art keywords
- cooling
- water pipe
- cast steel
- electric furnace
- cast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000001816 cooling Methods 0.000 title claims abstract description 71
- 238000005266 casting Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000498 cooling water Substances 0.000 claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 239000002826 coolant Substances 0.000 claims abstract description 33
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000007711 solidification Methods 0.000 claims abstract description 7
- 230000008023 solidification Effects 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims description 37
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical group O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- -1 after preparing Substances 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 abstract 1
- 238000001953 recrystallisation Methods 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 9
- 229910001141 Ductile iron Inorganic materials 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 238000007531 graphite casting Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
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
Abstract
The invention relates to a casting method of electric furnace water cooling cast steel furnace cover, which adopts a cast steel material to cast a base body and a cooling water pipe. The casting method comprises the following steps: adding a slagging agent and a silicon iron alloy block in molten steel for casting steel; putting the cooling water pipe into a casting model and leading a liquid cold medium and a composite solid cooling medium to pass through the cooling water pipe; using molten steel for casting steel to cast the base body, casting the middle part of the cooling water pipe into the base body and leading the two ends thereof to extend from the base body; leading the casting model to be horizontal when in modeling, leading a feeder head to be modeled lopsidedly toward one side and heightening one side of the feeder head of the model after the model is boxed; adopting an upper layer of inner sprue and a lower layer of lower sprue to carry out stepped casting so as to form sequential solidification; and cooling and disassembling the model. The casting method can effectively avoid the cooling water pipe from being penetrated in a fusing manner during the casting process, avoids air gaps from being generated between the base body and the cooling water pipe, avoids refusion and recrystallization, accurately realizes the microfusion of the outer surface of the cooling water pipe, prolongs the service life of the electric furnace water cooling cast steel furnace cover, further prolongs the service life of a metallurgical high-temperature kiln, saves production cost and improves the mechanical performance of the electric furnace water cooling cast steel furnace cover.
Description
Technical field
The present invention relates to a kind of metallurgy high temperature stove, specifically relate to a kind of casting method that is used for the electric furnace water cooling cast steel furnace cover of metallurgy high temperature stove, belong to the steel-making metallurgical technology field.
Background technology
The electric furnace water cooled cover is the equipment that cooling is provided for the metallurgy high temperature stove, can protect the metallurgy high temperature stove to avoid the erosion and the mechanical wear of high temperature fluid in the body of heater, prolongs the metallurgy high temperature stove life-span, guarantees its safety and stability production.In a single day cooling device goes wrong, and the metallurgy high temperature kiln is stop production to overhaul comprehensively, will bring heavy economic losses.So the life-span of the life-span of electric furnace water cooled cover and performance decision metallurgy high temperature stove is metallurgy high temperature stove long-service life high-efficiency, energy-conservation important assurance.
The electric furnace water cooled cover material that current domestic and international metallurgical industry is generally adopted is based on cast iron, and still, there are many deficiencies in cast iron electric furnace water cooled cover.With most popular spheroidal graphite cast-iron electric furnace water cooled cover is example, it has the following disadvantages: (1) spheroidal graphite cast-iron electric furnace water cooled cover must add anti-carburization coating outside the cooling duct, make between passage and the matrix and form air gap, and air gap makes electric furnace water cooled cover heat transmission resistance significantly increase, worsen the heat-transfer effect of electric furnace water cooled cover, increase electric furnace water cooled cover working face temperature, quicken the breakage of electric furnace water cooled cover; (2) be covered with the globular graphite (particle diameter 0.025～0.150mm) that varies in size on the spheroidal graphite cast-iron matrix, countless small holes have been equivalent to form after globular graphite is oxidized, constituted the cradle that crack and crackle take place, quickened the expansion of crack and crackle, thereby cause the electric furnace water cooled cover to shorten service life, increase resource consumption, be unfavorable for electric furnace water cooled cover longevity, energy-conservation; (3) when the large-scale spheroidal graphite casting of casting, C, S, P are pushed to liquid zone easily in the column crystallization process, form a segregation thing enrichment region in center equiax crystal district, the percentage elongation at cast(ing) surface and center is existed than big-difference, the surface percentage elongation is greater than the centre more than one times, promote the generation and the expansion of spheroidal graphite cast-iron crack or crackle, be unfavorable for electric furnace water cooled cover longevity; (4) linear expansion coefficient of spheroidal graphite cast-iron is more steady in variation below 600 ℃, but more than 600 ℃ then the rising with temperature rapid irreversible " growth " takes place, when temperature during greater than 709 ℃ matrix phase transformation has taken place, the coefficient of expansion and internal stress sharp increase, its breakage speeds up; (5) spheroidal graphite cast-iron thermal conductivity and thermal shock resistance are all relatively poor, and its thermal conductivity factor only is 30wm
-2K
-1, be unfavorable for the efficient cooling of electric furnace water cooled cover.
Because the particularity of cast steel material and the difficulty of pouring technology are therefore less in the application problem research of metallurgical industry to electric furnace water cooling cast steel furnace cover abroad, the less report that is seen in of its achievement in research.But,, and, electric furnace water cooling cast steel furnace cover has been carried out Primary Study based on the superiority of cast steel material because domestic metallurgical industry is very big to electric furnace water cooled cover demand.
Domestic indivedual enterprise puts into practice the production of electric furnace water cooling cast steel furnace cover, but the result is barely satisfactory.Main cause comprises five aspects, and the first, in the process of pouring electric furnace water cooled cover, cooling water pipe is very easily by the high-temperature molten steel burn through, the percent defective height; The second, in casting process, weld a large amount of chills at the cooling water pipe outer surface, chill melts in the process of building not exclusively, destroy the overall mechanical properties of cooling water pipe and circuit water cooled cover matrix, and impel air gap to produce the heat transfer property of severe exacerbation electric furnace water cooled cover; The 3rd, in casting process, the inner easily generation of cooling water pipe oxidation, product quality reduces greatly; The 4th, molten steel cleaningization technology lacks system research, the properties of product instability in electric furnace water cooling cast steel cast steel one-time cast-forming process; The 5th, the electric furnace water cooled cover of metallurgical industry belongs to thick and large casting, and mass defects such as the pore of thick and large casting, loose, segregation solve at casting industry always as yet fully.In addition, the Technology for Heating Processing shortage system research at electric furnace water cooling cast steel furnace cover does not propose specification of heat treatment as yet.Therefore, the electric furnace water cooling cast steel furnace cover yield rate is very low, and performance is not good, and the life-span is not long yet.
At present, some document is studied electric furnace water cooling cast steel furnace cover and similar bell thereof theoretically, mainly lays particular emphasis on analysis of Heat Transfer, sets up the mathematical model optimizing design, and positive impetus has been played in development to electric furnace water cooling cast steel furnace cover.But the problem that exists in the actual production process of electric furnace water cooling cast steel furnace cover relates to all many-sides, its application and popularization need be taken all factors into consideration various aspects: set up Mathematical Modeling and carry out thermal conduction study calculating, the selection of matrix material, the selection of design parameter, the smelting of molten steel cleaningization, the control of cast steel cooled and solidified, electric furnace water cooling cast steel furnace cover heat treatment, Performance Detection and assessment etc.Consider and well to deal with problems that the multi-disciplinary basic principle that needs to intersect is carried out system research merely from some angles.Because above-mentioned restriction, the application on the electric furnace water cooled cover still can not reach industrial application requirements for cast steel at present.
Summary of the invention
In order to overcome the problem that prior art exists, the object of the present invention is to provide a kind of new traditional cast iron materials of cast steel substrate material replacement that utilizes, adopt new manufacturing process to overcome the generation of air gap thermal resistance, the gas cooled pattern that breaks traditions, avoid using the current internal densener piece that must not adopt then, realize accurately control caloric receptivity, guarantee that remelting and crystallization more do not take place the cooling water pipe outer surface, impel the cooling water pipe surface little molten in casting process, and make cooling water pipe after cast, combine closely with matrix; The casting technique of optimal control electric furnace water cooling cast steel furnace cover effectively reduces element segregation; By adding specific alloy and optimizing the casting method that Technology for Heating Processing improves the electric furnace water cooling cast steel furnace cover of electric furnace water cooling cast steel furnace cover performance.
For achieving the above object, the technical solution adopted for the present invention to solve the technical problems is:
A kind of casting method of electric furnace water cooling cast steel furnace cover is characterized in that adopting cast steel material cast matrix and cooling water pipe, may further comprise the steps:
(1), adopt intermediate frequency furnace (3 tons of unit weights) smelting molten steel, in smelting molten steel latter stage, divide secondary to add slag forming agent, make it evenly cover molten steel surface;
(2), before molten steel is come out of the stove, the Antaciron piece that disposable interpolation granularity is 30-40mm in induction furnace, the mode that adopts machinery to spray into is added;
(3), the preparation composite solid cooling medium, after preparing, composite solid cooling medium under atmospheric environment, is carried out high temperature sintering, calcination temperature is controlled at 900-1300 ℃, removes the adhesive sinter piece into;
(4), be equipped with the liquid cooling medium of reusable edible, the characteristics of this liquid cooling medium are: specific heat capacity is not bigger, and is volatile under the high temperature, do not cohere, do not corrode the cast steel cooling water pipe, do not change the proper constituent and the mechanical performance of cast steel cooling water pipe;
(5), will put into the cast model on request with the cooling water pipe (its material is No. 20 steel) that cast steel material is made, by the external high-pressure hydraulic pump of resistant to elevated temperatures flexible pipe, the pressure of high-pressure hydraulic pump is 5-15Mpa at the two ends of cooling water pipe; Before pouring molten steel, in cooling water pipe, feed the liquid cooling medium of circulation in advance, in the pouring molten steel process, composite solid cooling medium is joined in the liquid cooling medium of circulation, such pouring technology can guarantee that the cooling water pipe surface is little molten;
(6), with the cast steel pouring molten steel matrix that adds the Antaciron piece, the middle part of cooling water pipe is cast in the matrix, stretch out from matrix at two ends, the control molten steel overheat is 100-120 degree centigrade of scope;
(7), merge the advantage of cast of secondary ladder and inclined casting, promptly in modeling process, allow the accumbency of cast model, rising head is laid particular stress on a side moulding, with model rising head one side bed hedgehopping, makes rigid flask become the 10-15 degree with ground after the model mould assembling; In casting process, adopt two-layer ingate up and down to carry out ladder cast (two-layer ingate be spaced apart 10-50cm), control the process of setting of electric furnace water cooling cast steel furnace cover matrix in view of the above, impel it to form consecutive solidification;
(8), the cooling, lay down model, electric furnace water cooling cast steel furnace cover is made.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover, the middle part that it is characterized in that described cooling water pipe is circular, two ends are upwards crooked, matrix is with the level circular, the part that diameter is big makes progress, and the part that diameter is little is downward, and cooling water pipe is arranged in matrix, combine closely with matrix, stretch out from the upside of the big part of diameter two ends of cooling water pipe.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described composite solid cooling medium is Cr2O3:45-47%, SiO2:1-2%, CaO:0.5-1%, FeO:20-30%, MgO:10-15%; AL2O3:10-20%; All the other compositions are that granularity is a 70-100 purpose carbon dust.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described slag forming agent, comprising the calcium oxide of 80-85% and the magnesia of 10-15%.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described slag forming agent, and its additional proportion is a 1kg/ ton molten steel.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described Antaciron piece, and its composition is 15-20% rare earth element, 20-30% silicon, 50-65% metallic iron.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described Antaciron piece, its addition 0.1-0.7kg/ ton molten steel.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described liquid cooling medium, and its flow velocity is 1-10m/s.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover is characterized in that described composite solid cooling medium, and its addition is: 1-10kg/ ton molten steel.
The casting method of aforesaid electric furnace water cooling cast steel furnace cover, the cross section that it is characterized in that described cooling water pipe is for oval, and the length ratio of described oval-shaped minor axis and major axis is 0.5～0.7.
The invention has the beneficial effects as follows: adopt casting method teeming furnace water cooling cast steel bell of the present invention, can effectively avoid cooling water pipe burn through in casting process; Avoid producing air gap between electric furnace water cooling cast steel furnace cover matrix and cooling water pipe; Avoid cooling water pipe that remelting and crystallization again take place in casting process, destroy the original rolling performance of cooling water pipe; Accurately realize the little molten of cooling water pipe outer surface, solved cooling water pipe burn through and inner surface problem of oxidation in casting process, prolong the life-span of electric furnace water cooling cast steel furnace cover life-span and then prolongation metallurgy high temperature kiln, save production cost; Make cooling water pipe and matrix combine closely, improve the cooling effect of matrix; The control solidification mode is realized consecutive solidification, improves the mechanical performance of electric furnace water cooling cast steel furnace cover.
Description of drawings
Fig. 1 is the central cross-sectional view of electric furnace water cooling cast steel furnace cover of the present utility model;
Fig. 2 is the vertical view of electric furnace water cooling cast steel furnace cover of the present utility model.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the central cross-sectional view of electric furnace water cooling cast steel furnace cover of the present invention; Fig. 2 is the vertical view of electric furnace water cooling cast steel furnace cover of the present invention.
The casting method of electric furnace water cooling cast steel furnace cover of the present invention is chosen to be cast steel with the material of cooling water pipe, adopts cast steel material cast matrix simultaneously, specifically pours into a mould step and is:
(1), adopts intermediate frequency furnace (3 tons of unit weights) smelting molten steel, in smelting molten steel latter stage, divide secondary to add slag forming agent, make it evenly cover molten steel surface, consume the ratio adding of slag forming agent in 1kg/ ton molten steel altogether, slag forming agent comprises 80-85% calcium oxide and 10-15% magnesia;
(2), before molten steel is come out of the stove, the Antaciron piece that disposable interpolation granularity is 30-40mm in induction furnace, the Antaciron piece comprises 15-20% rare earth element, 20-30% silicon and 50-65% metallic iron, and the mode that adopts machinery to spray into is added, and addition is 0.1-0.7 kilogram/ton molten steel;
(3), by composition requirement preparation composite solid cooling medium, after preparing, composite solid cooling medium under atmospheric environment, is carried out high temperature sintering, calcination temperature is controlled at 900-1300 ℃, removes the adhesive that sinters piece into;
(4), be equipped with the liquid cooling medium of reusable edible, the characteristics of this liquid cooling medium are: specific heat capacity is not bigger, and is volatile under the high temperature, do not cohere, do not corrode the cast steel cooling water pipe, do not change the proper constituent and the mechanical performance of cast steel cooling water pipe;
(5), will put into the cast model on request with the cooling water pipe (its material is No. 20 steel) that cast steel material is made, by the external high-pressure hydraulic pump of resistant to elevated temperatures flexible pipe, the pressure of high-pressure hydraulic pump is 5-15Mpa at the two ends of cooling water pipe; Before pouring molten steel, in cooling water pipe, feed the liquid cooling medium of circulation in advance, its flow rates is: 1-10m/s, in the pouring molten steel process, composite solid cooling medium is joined in the liquid cooling medium of circulation, its addition is: 1-10kg/ ton molten steel, such pouring technology can guarantee that the cooling water pipe surface is little molten;
(6), with the cast steel pouring molten steel matrix that adds the Antaciron piece, the middle part of cooling water pipe is cast in the matrix, stretch out from matrix at two ends, the control molten steel overheat is 100-120 degree centigrade of scope;
(7), merge the advantage of cast of secondary ladder and inclined casting, promptly in modeling process, allow the accumbency of cast model, rising head is laid particular stress on a side moulding, with model rising head one side bed hedgehopping, makes rigid flask become the 10-15 degree with ground after the model mould assembling; In casting process, adopt two-layer ingate up and down to carry out ladder cast (two-layer ingate be spaced apart 10-50cm), control the process of setting of electric furnace water cooling cast steel furnace cover matrix in view of the above, impel it to form consecutive solidification;
(8), the cooling, lay down model, electric furnace water cooling cast steel furnace cover is made.
The middle part of above-mentioned cooling water pipe 2 is circular, two ends are upwards crooked, matrix 1 is with the level circular, the part that diameter is big makes progress, the part that diameter is little is downward, cooling water pipe 2 is arranged in matrix 1, combines closely with matrix 1, and stretch out from the upside of the big part of diameter two ends of cooling water pipe 2.
In the present invention, developed a kind of composite solid cooling medium, the composition of composite solid cooling medium is Cr2O3:45-47%, SiO2:1-2%, CaO:0.5-1%, FeO:20-30%, MgO:10-15%; AL2O3:10-20%; All the other compositions are that granularity is a 70-100 purpose carbon dust.The gas cooled pattern that the present invention breaks traditions, avoid using current must not adopt then to the disadvantageous internal densener piece of material property, realize accurately control caloric receptivity, guarantee that remelting and crystallization more do not take place cooling water pipe 2 outer surfaces, solved the problem of cooling water pipe 2 burn through and oxidation in casting process, impel cooling water pipe 2 surfaces little molten in casting process, and make cooling water pipe 2 after cast, combine closely with matrix 1, keep grain form and the structural behaviour of cooling water pipe 2 under original rolling condition, kept cooling water pipe 2 original good rolling performances.And, can change the proportioning of composite solid cooling medium according to different needs, change heat transfer efficiency, thereby control the surperficial little molten of cooling water pipe 2, guarantee in conjunction with effect.
In order to increase the heating surface area of cooling water pipe 2, the cross section of cooling water pipe 2 is made as ellipse.And through calculating, the length ratio of oval-shaped minor axis and major axis adopts 0.5～0.7, and heating surface area and heat transfer efficiency are in an optimum state.
The present invention all is chosen to be cast steel with the material of cooling water pipe 2 and the basic material of matrix 1, and effectively avoids a series of problems of using anti-carburization coating and bringing; In casting process, by cooling water pipe, the protection cooling water pipe melts and does not change the exploitation composite solid cooling medium with fluid, impels the cooling water pipe surface little molten; In casting process, adopt special pouring technology, control electric furnace water cooling cast steel furnace cover process of setting, the condition of formation consecutive solidification; Add special rare earth alloy element, crystal grain thinning reduces element segregation, and stability and safety production improves the electric furnace water cooling cast steel furnace cover performance.
The cardinal principle that electric furnace water cooling cast steel furnace cover of the present invention is applied to metallurgical furnace kiln is: the exit region that electric furnace water cooling cast steel furnace cover is placed the metallurgy high temperature stove, cooling medium (such as, water) press design current velocity and pass through electric furnace water cooling cast steel furnace cover inside from the lower port of the cooling water pipe 2 of electric furnace water cooling cast steel furnace cover, by this way, heat is passed to the matrix 1 of electric furnace water cooling cast steel furnace cover from metallurgy high temperature stove inside, cooling medium is taken heat out of the metallurgy high temperature stove from matrix 1 again, make the furnace shell of metallurgical furnace kiln avoid high temperature erosion, thereby prolong the metallurgical furnace kiln life-span.Regulate the cooling performance of electric furnace water cooling cast steel furnace cover by regulating cooling water flow and flow velocity.
The foregoing description does not limit the present invention in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in protection scope of the present invention.
Claims (9)
1. the casting method of an electric furnace water cooling cast steel furnace cover is characterized in that adopting cast steel material cast matrix and cooling water pipe, may further comprise the steps:
(1), adopt the intermediate frequency furnace smelting molten steel, in smelting molten steel latter stage, divide secondary to add slag forming agent, make it evenly cover molten steel surface;
(2), before molten steel is come out of the stove, the Antaciron piece that disposable interpolation granularity is 30-40mm in induction furnace, the mode that adopts machinery to spray into is added;
(3), the preparation composite solid cooling medium, after preparing, composite solid cooling medium under atmospheric environment, is carried out high temperature sintering, calcination temperature is controlled at 900-1300 ℃, removes the adhesive sinter piece into; Described composite solid cooling medium is Cr2O3:45-47%, SiO2:1-2%, CaO:0.5-1%, FeO:20-30%, MgO:10-15%; AL2O3:10-20%; All the other compositions are that granularity is a 70-100 purpose carbon dust;
(4), be equipped with the liquid cooling medium of reusable edible;
(5), will put into the cast model on request with the cooling water pipe that cast steel material is made, by the external high-pressure hydraulic pump of resistant to elevated temperatures flexible pipe, the pressure of high-pressure hydraulic pump is 5-15Mpa at the two ends of cooling water pipe; Before pouring molten steel, in cooling water pipe, feed the liquid cooling medium of circulation in advance, in the pouring molten steel process, composite solid cooling medium is joined in the liquid cooling medium of circulation, little molten to guarantee the cooling water pipe surface;
(6), with the cast steel pouring molten steel matrix that adds the Antaciron piece, the middle part of cooling water pipe is cast in the matrix, stretch out from matrix at two ends, the control molten steel overheat is 100-120 degree centigrade of scope;
(7), in modeling process, allow cast model accumbency, rising head is laid particular stress on a side moulding, with model rising head one side bed hedgehopping, makes rigid flask become the 10-15 degree with ground after the model mould assembling; Adopt in casting process up and down that two-layer ingate carries out the ladder cast, two-layer ingate be spaced apart 10-50cm, control the process of setting of electric furnace water cooling cast steel furnace cover matrix in view of the above, impel it to form consecutive solidification;
(8), the cooling, lay down model, electric furnace water cooling cast steel furnace cover is made.
2. the casting method of electric furnace water cooling cast steel furnace cover according to claim 1, the middle part that it is characterized in that described cooling water pipe is circular, two ends are upwards crooked, matrix is with the level circular, the part that diameter is big makes progress, and the part that diameter is little is downward, and cooling water pipe is arranged in matrix, combine closely with matrix, stretch out from the upside of the big part of diameter two ends of cooling water pipe.
3. the casting method of electric furnace water cooling cast steel furnace cover according to claim 1 is characterized in that described slag forming agent, comprising the calcium oxide of 80-85% and the magnesia of 10-15%.
4. according to the casting method of claim 1 or 3 described electric furnace water cooling cast steel furnace covers, it is characterized in that described slag forming agent, its additional proportion is a 1kg/ ton molten steel.
5. the casting method of electric furnace water cooling cast steel furnace cover according to claim 1 is characterized in that described Antaciron piece, and its composition is 15-20% rare earth element, 20-30% silicon, 50-65% metallic iron.
6. the casting method of electric furnace water cooling cast steel furnace cover according to claim 1 or 5 is characterized in that described Antaciron piece, its addition 0.1-0.7kg/ ton molten steel.
7. the casting method of electric furnace water cooling cast steel furnace cover according to claim 1 is characterized in that described liquid cooling medium, and its flow velocity is 1-10m/s.
8. according to the casting method of claim 1 or 7 described electric furnace water cooling cast steel furnace covers, it is characterized in that described composite solid cooling medium, its addition is: 1-10kg/ ton molten steel.
9. the casting method of electric furnace water cooling cast steel furnace cover according to claim 1 is characterized in that the cross section of described cooling water pipe is ellipse, and the length ratio of described oval-shaped minor axis and major axis is 0.5～0.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100273652A CN101634524B (en) | 2009-05-31 | 2009-05-31 | Casting method of electric furnace water cooling cast steel furnace cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100273652A CN101634524B (en) | 2009-05-31 | 2009-05-31 | Casting method of electric furnace water cooling cast steel furnace cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101634524A CN101634524A (en) | 2010-01-27 |
| CN101634524B true CN101634524B (en) | 2011-06-08 |
Family
ID=41593788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100273652A Expired - Fee Related CN101634524B (en) | 2009-05-31 | 2009-05-31 | Casting method of electric furnace water cooling cast steel furnace cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101634524B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615901B (en) * | 2013-12-05 | 2015-10-21 | 江苏联兴成套设备制造有限公司 | The production method of slag runner cooler |
| CN103949612A (en) * | 2014-05-07 | 2014-07-30 | 张海玉 | Manufacturing method for durable cast iron calcium carbide drawing nozzle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414861A1 (en) * | 1984-04-19 | 1985-10-31 | Steinfurter Eisenwerk GmbH, 4430 Steinfurt | Water-cooled cover for industrial furnaces |
| EP0171905A1 (en) * | 1984-08-16 | 1986-02-19 | Fuchs Systems Inc. | Liquid cooled cover for electric arc furnace |
| CN2160872Y (en) * | 1993-07-22 | 1994-04-06 | 工贸联营烟台石化管件厂 | Water-cooling calandria furnace lid for electric steel-smelting furnace |
| US6404799B1 (en) * | 1999-02-03 | 2002-06-11 | Nippon Steel Corporation | Water-cooling panel for furnace wall and furnace cover of arc furnace |
| CN2760484Y (en) * | 2004-08-30 | 2006-02-22 | 丁增佳 | Fining furnace water-cooled cover |
| CN201177456Y (en) * | 2008-01-22 | 2009-01-07 | 山东广富集团有限公司 | Water cooling furnace cover for electric arc furnace |
-
2009
- 2009-05-31 CN CN2009100273652A patent/CN101634524B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414861A1 (en) * | 1984-04-19 | 1985-10-31 | Steinfurter Eisenwerk GmbH, 4430 Steinfurt | Water-cooled cover for industrial furnaces |
| EP0171905A1 (en) * | 1984-08-16 | 1986-02-19 | Fuchs Systems Inc. | Liquid cooled cover for electric arc furnace |
| CN2160872Y (en) * | 1993-07-22 | 1994-04-06 | 工贸联营烟台石化管件厂 | Water-cooling calandria furnace lid for electric steel-smelting furnace |
| US6404799B1 (en) * | 1999-02-03 | 2002-06-11 | Nippon Steel Corporation | Water-cooling panel for furnace wall and furnace cover of arc furnace |
| CN2760484Y (en) * | 2004-08-30 | 2006-02-22 | 丁增佳 | Fining furnace water-cooled cover |
| CN201177456Y (en) * | 2008-01-22 | 2009-01-07 | 山东广富集团有限公司 | Water cooling furnace cover for electric arc furnace |
Non-Patent Citations (1)
| Title |
|---|
| JP特開2005-207650A 2005.08.04 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101634524A (en) | 2010-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101634520B (en) | Casting method of cast steel cooling plate | |
| CN201150980Y (en) | Composite crystallizer device for continuous casting of titanium-nickel alloy | |
| CN102921927A (en) | Preparation method of double-liquid bimetal composite wear-resistant lining board | |
| CN102228986A (en) | Tundish with electromagnetic heating water gaps | |
| CN101417329A (en) | Method with lost foam casting process production blast furnace water-cooling wall | |
| CN103615901B (en) | The production method of slag runner cooler | |
| CN101634521B (en) | Casting method of cast steel rotary furnace flue | |
| CN101634524B (en) | Casting method of electric furnace water cooling cast steel furnace cover | |
| CN101634523B (en) | Casting method of cast steel cooling wall | |
| CN103611921B (en) | The production method of skimming tool | |
| CN101634522B (en) | Casting method of steel brick of cast steel furnace throat with water cooling | |
| CN202106027U (en) | Tundish with electromagnetic heating nozzles | |
| CN201545856U (en) | Cooler with water-cooled cast steel slag ditch | |
| CN103157785A (en) | Construction method of ladle lining | |
| CN201421266Y (en) | Cast steel cooling plate | |
| CN202155518U (en) | Non-ferrous alloy molten metal casting ladle with heat insulation function | |
| CN202522062U (en) | Copper and copper alloy intermediate-frequency induction melting furnace | |
| CN101733371A (en) | Function protective materials for oblong taperless steel ingots | |
| CN103639364A (en) | Cast iron anode mold capable of improving copper pouring amount and production method thereof | |
| CN201421263Y (en) | Cast steel cooling wall | |
| CN109321814B (en) | Cast iron section bar for glass mold and preparation method thereof | |
| CN103722156B (en) | A kind of casting method of cooling plate provided with steel tube casted in copper base and used for submerged arc furnace | |
| CN201421257Y (en) | Electric furnace water-cooling cast steel furnace cover | |
| CN201434593Y (en) | Alloy furnace throat steel brick with water cooling | |
| CN201421264Y (en) | Cast steel converter flue |
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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Casting method of electric furnace water cooling cast steel furnace cover Effective date of registration: 20190821 Granted publication date: 20110608 Pledgee: Jingjiang Branch of Bank of China Ltd. Pledgor: JIANGSU LIANXING COMPLETE SETS OF EQUIPMENT MANUFACTURE Co.,Ltd. Registration number: Y2019320000068 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200820 Granted publication date: 20110608 Pledgee: Jingjiang Branch of Bank of China Ltd. Pledgor: JIANGSU LIANXING COMPLETE SETS OF EQUIPMENT MANUFACTURE Co.,Ltd. Registration number: Y2019320000068 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Casting method of water cooled cast steel cover for electric furnace Effective date of registration: 20200821 Granted publication date: 20110608 Pledgee: Jingjiang Branch of Bank of China Ltd. Pledgor: JIANGSU LIANXING COMPLETE SETS OF EQUIPMENT MANUFACTURE Co.,Ltd. Registration number: Y2020980005248 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210819 Granted publication date: 20110608 Pledgee: Jingjiang Branch of Bank of China Ltd. Pledgor: JIANGSU LIANXING COMPLETE SETS OF EQUIPMENT MANUFACTURE Co.,Ltd. Registration number: Y2020980005248 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Casting method of water-cooled cast steel furnace cover of electric furnace Effective date of registration: 20210820 Granted publication date: 20110608 Pledgee: Jingjiang Branch of Bank of China Ltd. Pledgor: JIANGSU LIANXING COMPLETE SETS OF EQUIPMENT MANUFACTURE Co.,Ltd. Registration number: Y2021980008031 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220905 Granted publication date: 20110608 Pledgee: Jingjiang Branch of Bank of China Ltd. Pledgor: JIANGSU LIANXING COMPLETE SETS OF EQUIPMENT MANUFACTURE Co.,Ltd. Registration number: Y2021980008031 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |