CN1031557C - Method and apparatus for continuous casting - Google Patents
Method and apparatus for continuous casting Download PDFInfo
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- CN1031557C CN1031557C CN 91105622 CN91105622A CN1031557C CN 1031557 C CN1031557 C CN 1031557C CN 91105622 CN91105622 CN 91105622 CN 91105622 A CN91105622 A CN 91105622A CN 1031557 C CN1031557 C CN 1031557C
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Abstract
A continuous casting apparatus comprises continuously supplying molten metal from a tundish to a cooled mold having an inlet and an outlet at least through a break ring, forming a cast section by continuously cooling the molten metal in the mold and starting the solidification of the molten metal below its surface, and intermittently withdrawing the cast section with respect to the mold through its outlet. During continuous casting, a sealing gas having a pressure higher than atmospheric and being soluble in the molten metal is invariable supplied to the entirety of the contact area of the mold and the break ring.
Description
The present invention relates to a kind of continuous cast method and equipment, refer in particular to a kind of with motlten metal infeed continuously cooling cylindrical mold, melt metal at its continuous cast method and equipment that is solidified to form strand below surface, subsequently the strand that forms is extracted out at in-mold molten from mold.
Method and apparatus of the present invention is applicable to the blank of continuous casting carbon steel, stainless steel and other metals and the section bar of other shapes.
Horizontal casting is a kind of known technology, and this technology is solidified the motlten metal that infeeds continuously in the cooling cylindrical mold that is lower than the surface, deposite metal.In horizontal casting, a disconnection ring that has begun stabilization to metal-cured that is arranged on mold import department has a circumferential step to stretch in the mold of internal diameter greater than stepped diameters.Closely contacting with mold for keep disconnecting ring, for example, can make their matching surface conical and press fit over together mutually.
The curing that in-mold molten melts metal is from beginning (being in the downstream of metal flow) near the front end circumference that disconnects ring, and the shell that has solidified is grown continuously and extracted out off and on by the outlet of mold simultaneously.
Use said method, its surface of the strand of casting often forms bubble down, and this has several reasons.Thermal expansion or other reasons for example, press fit over mold, owing to can produce the gap even will disconnect ring as mentioned above.Because the ferrostatic pressure at the motlten metal that solidifies initial disconnection ring place is higher than atmospheric pressure, so air can be near making metal begin the disconnection ring that solidifies below molten metal surface.But when the shell that solidify to form by when the front end that disconnects ring is extracted out and is separated, though very short time just, one almost is the just formation between the rear end of front end that disconnects ring and solidifying shell (in the face of disconnecting the front end of ring) of gap of finding time.So air passes through from disconnecting the ring outside, enters above-mentioned gap through the path between the matching surface that disconnects ring and mold, and then enter motlten metal and form bubble.Sometimes, the air that enters from the port of export of mold enters above-mentioned gap through the path that disconnects between ring and the mold, enters motlten metal again and forms bubble.
Bubble under casting billet surface 2 to 3 millimeters locate to form.When rolling subsequently, the bubble in the strand can form the kinds of surface defective, such as slit and longitudinal crack.These defectives must be especially serious in strict conformity with other products that surface quality requires for stainless steel and other.So, must remove bubble by scarfing or other surface treatment methods, but this has just improved production cost and has reduced output.
Disclosed a kind of technology of ring that disconnect of installing in the Japanese Utility Model patent that application number in 1989 is No.38136 to stop air to infiltrate.This technology is to seal the junction that disconnects ring and motlten metal cooling section (mold) with a sealing ring of being made by heat proof material.But sealing ring can very fast damage, for example temperature that can bear above it from the next heat of mold when being heated.The sealing ring that damages loses its sealing function, and air still infiltrates mold as a result, and forms bubble in solidifying shell.
U.S. Patent No. 4,817,701 have disclosed the continuous casting technology that inert gas seal motlten metal that a kind of usefulness do not react with motlten metal infeeds nozzle and mold import.The purpose of this technology is the infiltration that thoroughly stops atmosphere, thereby prevents its oxidation fusion metallic surface.But this technology can not be got rid of the danger that forms bubble in strand.
By analyzing the reason of gas to determine that bubble forms in the formed bubble, the inventor finds that the gas in the bubble mainly is made up of argon gas, and the nitrogen content of bubble metal on every side is than other places height.Can infer from this discovery, airborne nitrogen may be dissolved in the deposite metal, and the argon gas that is insoluble to motlten metal has just formed bubble.For confirming this deduction, made a cc test, the practice is that inert argon is infeeded in a screening arrangement that disconnects the ring periphery, as the technology of above-mentioned United States Patent (USP).In this test, casting billet surface is more than common no argon continuous casting with the bubble that forms in the lower area.When replacing insoluble argon gas to infeed, then there is not bubble to form with the nitrogen that is dissolved in the deposite metal.The present invention just is based on above-mentioned discovery.
1986, Japanese patent application publication No. 71157 has disclosed a kind of horizontal continuous casting technology, it adopts a cylindrical mold, infeeds a corner member in the mold with nitrogen, and this corner member comprises that one is inwardly outstanding and be positioned at refractory plate below the cylindrical mold axis from the inner surface of cylindrical mold.The point downstream that this technology contacts with the mold lower inner surface by mobile motlten metal and the even whole surface of cooling curing shell.Nitrogen only is incorporated into the bottom of corner member.Yet this technology can not stop air to infiltrate mold by the whole circumference that disconnects ring and mold inner surface joint.
The method and apparatus that the purpose of this invention is to provide the improved strand of a kind of continuous casting quality, by avoid that motlten metal is exposed to that gas that atmosphere stops argon gas or other to be insoluble to motlten metal infiltrates and strand in the formation of bubble.
Method and apparatus of the present invention is to infeed the sealing gas that is dissolved in the deposite metal and avoid motlten metal to be exposed to atmosphere by may infiltrate the mold place to air.Sealing gas is dissolved in the deposite metal just can not form bubble in strand.This has just eliminated in strand and has removed necessity of bubble, thereby can guarantee to carry out with low cost the production of surperficial flawless high-quality rolled products.
The method according to this invention, continuously supply with deposite metal (M) from cast gate (10) to the cooling mold (24) that possesses entrance and exit by the disconnection ring (22) that is connected with casting mold (24) inlet, make solidifying of motlten metal (M) from beginning of molten metal surface below and formation strand (C), extract strand (C) out from the relative mold of mold (24) outlet side (24) off and on, it is characterized in that with mold (24) and disconnect the contact-making surface that encircles (22) isolating around the inlet of mold (24) and mold (24) inside, simultaneously supply with superatmospheric sealing gas, often supply with than low solvable of the static pressure that disconnects near the deposite metal (M) the ring (22) to the whole inlet of above-mentioned mold (24) to the whole entrance and exit of described mold, the solubility sealing gas of (M) in the deposite metal.
The continuous casting apparatus of said method according to the present invention, comprise the cooling mold (24) that possesses entrance and exit, the cast gate (10) that links to each other with mold (24) by the disconnection ring (22) that is connected with mold (24) inlet, contact-making surface with mold (24) and disconnection ring (22) enters the mouth mold (24) on every side and mold (24) internal insulation, with mold (24) motlten metal (M) in the mold (24) is cooled off, make motlten metal (M) from beginning to solidify to form strand (C) below the molten metal surface, off and on strand (C) is extracted out from the relative mold of mold (24) outlet side (24) with drawing mechanism (56), in addition, also comprise and center on mold inlet and/or export the mechanism that supplies with the sealing gas that surpasses atmospheric pressure, it is characterized in that the mechanism of described supply sealing gas is for often to the entire circumference supply pressure superatmospheric pressure of above-mentioned mold (24) inlet and be lower than the static pressure that disconnects near the motlten metal (M) the base (22), be dissolved in the mechanism (40) of the solubility sealing gas of motlten metal (M).
Fig. 1 is the vertical cutaway view of the horizontal caster of enforcement the present invention's principle;
Fig. 2 is the vertical cutaway view of sealing device that is positioned at the entrance point of mold shown in Figure 1;
Fig. 3 is the vertical cutaway view of sealing device that is positioned at the port of export of mold shown in Figure 1;
Fig. 4 is the vertical cutaway view of another sealing device that is positioned at the entrance point of mold shown in Figure 1;
Fig. 5 is the vertical cutaway view of another horizontal caster of enforcement the present invention's principle;
Fig. 6 is the vertical cutaway view of sealing device that is positioned at the entrance point of mold shown in Figure 5;
Fig. 7 is the vertical cutaway view of the sealing device between two adjacent molds shown in Figure 5;
Fig. 8 is the vertical cutaway view of another sealing device between two adjacent molds shown in Figure 5;
Fig. 9 is first mold of the billet caster of expression enforcement the present invention's principle and the cutaway view that installs thereof on every side;
Figure 10 is the front view that is right after at second mold of the first mold back shown in Figure 1;
Figure 11 is first mold of the opposing party's billet continuous casting machine of expression enforcement the present invention's principle and the cutaway view that installs thereof on every side;
Figure 12 is the cutaway view of the sealing device of the part remodeling between tundish and mold;
Figure 13 is the vertical cutaway view of the sealing device of another part remodeling between tundish and mold;
Figure 14 is for partly being coated with the vertical cutaway view of the adapter ring of encapsulant;
Figure 15 one is coated with the vertical cutaway view of the adapter ring of encapsulant;
Figure 16 is the vertical cutaway view of sealing device of another part ground remodeling of vertical continuous casting machine.
Horizontal caster is that a kind of motlten metal that makes begins to be solidified to form a solidifying shell, and the conticaster extracted out in the mold of the strand that will cast in being lower than the mold of molten metal surface.
Fig. 1 represents a kind of round blank horizontal casting machine.As shown in the figure, being positioned at the tundish nozzle 12 of bottom of tundish 10 and mold 24 disconnects ring 22 by an adapter ring 18 and and interconnects.One refractory material that can cast 13 is located between tundish nozzle 12 and the adapter ring 18.Tundish 10, tundish nozzle 12 and adapter ring 18 all are to be made by common zirconium or aluminium refractory material.When disconnection ring 22 was pressed into the import department of mold 24, adapter ring 18 was fixed in mold 24 by a metal fastenings 20.Disconnecting ring 22 is made by the heat-stable ceramic that contains boron nitride, silicon nitride etc.Mold 24 is made of copper, and is fixed on the casing 27 by a retainer ring 28.Casing 27 is connected to a cooling water inlet pipe 29 and a cooling water outlet pipe 30, and cooling water flow is through casing 27 cooling molds 24.Respectively there is a annular groove 31 in order to hold sealing ring 32 front and back end of casing 27.Sealing ring 32 prevents that cooling water is from leaking between mold 24 and the casing 27.Adapter ring 18, disconnection ring 22, mold 24 and casing 27 can link into an integrated entity with tundish 10, and be also removable.
Motlten metal M enters mold 24 from tundish 10 by tundish nozzle 12, adapter ring 18 and disconnection ring 22.Be subjected to the cooling effect of mold 24 inner surfaces, motlten metal M forms a solidifying shell S.Disconnection ring 22 places that are formed on of solidifying shell S begin.Disconnecting ring 22 stops solidifying shell S to extend to adapter ring 18 in other words round about.The strand C that is obtained by the curing of motlten metal M is extracted out from the outlet of mold 24 off and on by the nip rolls 56 of intermittently rotation.Strand C disconnects generation one gap between ring 22 and the solidifying shell S with respect to extracting out the intermittence of mold.Motlten metal M flows into this gap, forms a new solidifying shell S.Strand C can mould oscillation 24 realizes on the direction by extracting out when rotating nip rolls 56 continuously with respect to intermittently of mold 24 extracting out also.
As previously mentioned, air can enter by the gap between strand C and the mold 24 by the gap between the matching surface that disconnects ring 22 and mold with from the outside that mold exports from the outside that disconnects ring 22 and disconnect the space that produces between ring and the solidifying shell, forms the bubble that is trapped in the motlten metal M.For avoiding entering of air, the most preferred embodiment of being narrated has the sealing device shown in Fig. 1 to 3.
As illustrated in fig. 1 and 2, have a ring packing ring recess 33 on the inlet end face of mold 24 to hold a silicone rubber O-ring 34 (can bear 250 ℃).Sealing ring 34 is clipped in the middle between the inlet end face of ring 18 end face of flange and mold 24, forms an annular isolation space in the outside that disconnects ring 22 outer surfaces.Another sealing ring 35 is clipped in the middle between the inner surface of ring 18 excircle and retainer ring 28, to double to seal the outside that disconnects ring 22.This multi-sealed a kind of sealing closely that provides.
One sealing gas infeeds passage 38 and is arranged in the flange 25 of mold 24, and opening is at ring packing ring recess 33 places, and sealing gas infeeds passage 38 and is communicated with insulating space 36.The import that sealing gas infeeds passage 38 is connected with sealing gas and infeeds pipe 39.Air supply pipe 39 is connected with a nitrogen cylinder 40 by a pressure-regulating valve 41 again.
As shown in figs. 1 and 3, a ring packing case 44 is connected the port of export of mold 24.This seal box has an inboard to be lined with the sleeve 45 of graphite 46, and strand C passes sleeve 45.One ring packing ring recess 48 be opened in seal box 44 in the face of mold 24 exit end faces the surface of flange 47 on.One sealing ring 49 is contained in the ring packing ring recess 48, forms an O-ring seal insulating space 51 around strand C in the inboard of flange 47.One sealing gas infeeds passage 53 and is arranged in the flange 47.Opening is in the inboard of ring packing ring recess 48, and sealing gas infeeds passage 53 and is communicated with insulating space 51 like this.The import that sealing gas infeeds passage 53 infeeds pipe 54 with a sealing gas and links to each other, and air supply pipe 54 passes through a pressure-regulating valve 55 and links to each other with nitrogen cylinder 40.
In above-mentioned sealing device, pressure-regulating valve 41 and 55 nitrogen pressure is reduced to be higher than about 5 to the 6 kilogram/square centimeters of external atmosphere pressure after, supply with nitrogen from the insulating space 36 and the insulating space in the seal box 44 51 of nitrogen cylinder 40 between adapter ring 18 and mold 24.Though the initial pressure of nitrogen is higher than atmospheric pressure as mentioned above, its pressure since the resistance that in passage, runs into and disconnection in it arrives mold 24 encircle at 22 o'clock and fall greatly. low.The initial pressure of nitrogen should be set like this, promptly will make to disconnect the ferrostatic pressure that near ring 22 nitrogen pressures are no more than motlten metal M in the mold.Because nitrogen remains in insulating space 36 and 51 with the pressure that is higher than atmospheric pressure, the argon gas in the atmosphere just can not enter mold 24.In addition, owing to disconnect the ferrostatic pressure that near ring 22 nitrogen pressures keep below motlten metal M in the mold 24, nitrogen also can not flow and ejection from tundish 10 backward.Nitrogen dissolves the back in motlten metal M stays in the strand C with regard to not forming bubble.Even there are some nitrogen to overflow into mold 24, sleeve 45 or atmosphere, insulating space 36 and 51 always is full of the nitrogen by nitrogen cylinder 40 automatic supplies.
Although nitrogen is the best sealing gas that is soluble in the motlten metal, also can from carbon monoxide, carbon dioxide, hydrogen, methane, propane and ammonia, select one or more gases as sealing gas.
Fig. 4 is illustrated in a better simply example of the sealing device of mold entrance point, and the difference of itself and device shown in Figure 2 is there is not insulating space.Disconnect formation one annulus 37 between ring 22 and the retainer ring 28, but without sealing ring or other sealing structures.Be provided with a sealing gas that radially extends in the retainer ring 28 and infeed passage 38, its entrance point infeeds pipe 39 with sealing gas and links to each other.Because annular space 37 is not complete and atmosphere separates, the nitrogen pressure that infeeds wherein is approximately higher than atmospheric pressure 6 to 10 kilogram/square centimeters, is higher than the pressure in the sealing device as shown in Figure 2.
Also can be arranged to one at the outlet side of mold and similarly be full of high pressure nitrogen and the annulus of incomplete sealing.
Fig. 5 to 7 represents another most preferred embodiment of the present invention.In the narration below, with identical member in the expression of similar guide numbering and the most preferred embodiment shown in Figure 1, and its detailed description is omitted.
Horizontal caster shown in Figure 5 has one first mold 57 and one second mold 61.One tundish nozzle 12 disconnects ring 22 by a sliding door 15, an adapter ring 84 and one and communicates with first mold 57.Sliding door 15 is the same with tundish 10 grades, is to be made by common zirconium or aluminium refractory material.First mold 57 is the same with mold 24 in above-mentioned first most preferred embodiment.Second mold 61 is one by circumferentially being divided into four arc 62 identical adjustable block cast moulds of forming, and the inboard of each die piece all is lined with graphite 63.Support frame 66, connecting rod structure machine 68 and lead the port of export that moving sleeve 71 is connected first mold 57.The front end of each die piece 62 links to each other with linkage 68, and connecting rod 68 is led by leading moving sleeve 71.One spring lever 73 passes the rear portion of support frame 66.One end of spring lever 73 links to each other with each die piece 62 by pin 74, and an adjustment nut 76 is spun on the other end of spring lever 73.Cylindrical spring 78 is contained in support frame 66 and adjusts between the nut 76.Four hydraulic cylinders 80 are located in the support frame 66, and hemispherical supporting head 82 is located at the top of piston rod 81.Supporting head 82 on the piston rod 81 matches with shallow sphere recess 64 on each die piece 62.When hydraulic cylinder 80 is supplied with pressure fluids, just there is a power that each die piece 62 is verted around the pin 70 of linkage 68 and is added in power on the die piece 62 with antagonistic spring 78.The inclination of die piece 62 can be adjusted automatically according to the shrinkage degree of cooling strand C.
Narrate sealing device below.
At first narration is positioned at the sealing device of first mold, 57 entrance points.As illustrated in Figures 5 and 6, the hollow air ring 88 of a steel is sleeved on the adapter ring 84, and with concrete binding together, hollow air ring 88 is an annular, has a trapezoidal cross-section.The inside of hollow air ring 88 by a plurality of dividing plate (not shown)s separately.For increasing sealing ring 94 and 98 and near cooling effect, the broad face (front) of hollow air ring 88 is in the face of the entrance point of first mold 57, and the holding ring 85 of adapter ring is held the rear portion of hollow air ring 88.The cooling air infeeds pipe 89 and cooling air discharge pipe 90 is connected in hollow air ring 88.The cooling air infeeds pipe 89 and cooling air discharge pipe 90 passes an annular, double walled 107 (below will narrate) hermetically.One cooling device that is made of compressor, cooler and dehumidifier etc. is connected in the cooling air and infeeds pipe 89.Infeed the pipe 89 cooling air that infeed by making its cooling around flowing of hollow air ring 88 basically from the cooling air, enter atmosphere by cooling air discharge pipe 90 then.
One ring packing ring recess 93 is opened on the inlet end face of first mold 57, to hold the sealing ring 94 that a silicon rubber is made.Sealing ring 94 is contained between the inlet end face of the front end of hollow air ring 88 and first mold 57, forms the first annular isolation space " a " 95 outside the circumference that disconnects ring 22.One sealing ring 98 is contained between the inner surface of the outer surface of hollow air ring 88 and retainer ring 28, forms another first annular isolation space " b " 100 between sealing ring 94 and sealing ring 98.
One suction hole 102 is located in the flange 58 of first mold 57.Open to ring packing ring recess 93 in air-breathing aperture 102, and be communicated with first insulating space " a " 95.The air intake duct 103 that the import of suction hole 102 and is connected in vavuum pump 104 links to each other.One sealing gas feeding hole 105 is located in the flange 58 of first mold 57.Sealing gas feeding hole 105 is opened to first insulating space " b " 100.The import of sealing gas feeding hole 105 infeeds pipe 39 with sealing gas and links to each other, the annular, double walled 107 that will narrate below air supply pipe 39 passes hermetically.One nitrogen cylinder 40 is connected in sealing gas by pressure-regulating valve 41 and infeeds pipe 39.
One surrounding wall 106 is welded in the front end face of the framework 16 of sliding door 15.The annular, double walled 107 that steel plate is made is welded in the casing 27 of first mold 57, and the framework 16 in the face of sliding door 15 forms a seal groove 108.The sealing ring 109 that one kaolin fiber felt is made is contained in the seal groove 108.The inside of surrounding wall 106 and annular, double walled 107 forms the second ring-type insulating space 111.One nitrogen air inlet pipe 112 is vertical by surrounding wall 106.Nitrogen air inlet pipe 112 links to each other with nitrogen cylinder 40 by a pressure-regulating valve 114.
When the adapter ring 84 in the entrance point sealing device of aforesaid first mold 57 and first mold 57 interconnect, just have needed sealed surface pressure to act on the sealing ring 94, it is compressed between the front end of the inlet end face of first mold 57 and hollow air ring 88.Because a hydraulic cylinder (not shown) drives forwards, tundish 10 is connected in mold 57 and 61 by sliding door 15 and adapter ring 84.When the front end of surrounding wall 106 touched sealing ring 109, the inside of second insulating space 111 was sealed automatically.This has just saved necessity that the space between the sliding door 15 and first mold 57 is sealed.
During operation, vavuum pump 104 is extracted residual air out in first insulating space " a " 95, make its internal pressure keep below atmospheric pressure.Compressed nitrogen infeeds first insulating space " b " 100 and second insulating space 111 from nitrogen cylinder 40.Before air feed, will be reduced to from the pressure of the high pressure nitrogen of nitrogen cylinder 40 with pressure-regulating valve 41 and 114 and be approximately higher than atmospheric pressure 5 kilogram/square centimeters greatly.Because nitrogen gas pressure is higher than atmospheric pressure, does not have the inside that air enters sliding door 15, adapter ring 84 and first mold 57.Because of be dissolved among the strand C form solid solution flow into sliding door 15 or other local nitrogen that consume additional automatically by nitrogen cylinder 40.
A sealing surfaces of sealing ring 94 contacts with hollow air ring 88, and its another sealing surfaces contacts with the inlet end face of water-cooled first mold 57.Like this, the temperature of sealing ring 94 can keep below its temperature extremes that can bear.Therefore, sealing ring 94 can maintain the ability that resisting is heated degenerates and keep its original sealing property.Recorded the actual temperature of hollow air ring 88 at that time, near the maximum temperature the sealing ring is about 200 ℃, 230 ℃ of the limiting temperatures that the sealing ring of making well below silicon rubber can bear.
In above-mentioned sealing device, surrounding wall 106 and double wall 107 can hold sliding door 15, adapter ring 84 and disconnect ring 22, rather than adapter ring 84 and disconnection ring 22.In this design, surrounding wall 106 is fixed in the steel shell 11 of tundish 10.Equally, surrounding wall 106 also can be fixed in the casing 27 of first mold 57, rather than the framework 160 of sliding door 15.In this design, sealing ring 108 is the frameworks 16 that are connected in sliding door 15.
Narrate the sealing device between first mold 57 and second mold 61 now.Shown in Fig. 5 and 7, a ring packing ring recess 116 is opened on the exit end face of first mold 57, and a sealing ring 117 is contained in this groove.Equally, an annular nitrogen that leads to second mold 61 infeeds groove 118 and is opened in its entrance point.The inlet end face of second mold 61 that contacts with sealing ring 117 seals up nitrogen and infeeds groove 118.One sealing gas feeding hole 119 is located near the entrance point of second mold 61.Sealing gas feeding hole 119 is opened to nitrogen and is infeeded groove 118.One sealing gas infeeds the import that pipe 120 is connected in sealing gas feeding hole 119.Sealing gas infeeds pipe 120 and is connected in nitrogen cylinder 40 by a pressure-regulating valve 121.
Just now in the described sealing device, nitrogen is conducted to nitrogen from nitrogen cylinder 40 and infeeds groove 118, with pressure-regulating valve 121 its pressure is reduced to be approximately higher than atmospheric pressure 5 to 6 kilogram/square centimeters.Because the nitrogen pressure that nitrogen infeeds in the groove 118 is higher than atmospheric pressure, does not have air and enters first mold 57 and second mold 61.Even when nitrogen flows into mold 57 and 61, nitrogen infeeds groove 118 and also always is full of nitrogen by nitrogen cylinder 40 automatic supplies.
Fig. 8 represents a kind of simplification modification of first mold 57 and the sealing device between second mold 61 shown in Figure 7.The difference of the sealing device of this simplification and device shown in Figure 7 is that it does not have insulating space.Though annular nitrogen infeeds groove 118 and is arranged on the inlet end face of second mold 61, annular space 122 is formed between first mold 57 and second mold 61 122.Annular space 122 is without sealing ring or other materials sealing.Annular space 122 with without sealing ring or other materials sealing.Annular space 122 communicates with sealing gas feeding hole 119 in being arranged on die piece 62, infeeds the import that pipe 120 is connected in sealing gas feeding hole 119 with described sealing gas.Because annular space 122 is not to separate fully with atmosphere, infeed wherein nitrogen pressure than high approximately 6 to the 10 kilogram/square centimeters of atmospheric pressure, be higher than the air pressure in the sealing device as shown in Figure 7.
Just now Xu Shu second most preferred embodiment was a round billet continuous casting machine.To narrate billet caster below.
As shown in Figure 9, the sealing ring 123 made of a silicon rubber is contained between the casing and second mold 125 of first mold 57 in the mode around strand C.
As shown in figure 10, second mold 125 is made of four sidewall panelings 126, and every plate holder is held between the adjacent side wall block 126 of a graphite cake 127, two and is provided with a hornblock 129.Side wall block 126 and hornblock 129 all are made of steel, and by with second most preferred embodiment in the same device be fixed on the support frame.Cooling-water duct 131 is arranged in side wall block 126 and the hornblock 129.Each hornblock 129 has one to enter hole 132 with cooling-water duct 131 nitrogen that passes through that meets at right angles.Nitrogen infeeds pipe 133 and is connected in nitrogen and enters hole 132.Nitrogen infeeds pipe 133 and links to each other with a nitrogen cylinder 134 by a pressure-regulating valve 135.To be conducted to pressure that nitrogen enters the high pressure nitrogen in hole 132 from nitrogen cylinder 134 with pressure-regulating valve 135 is reduced to and is approximately higher than atmospheric pressure 5-6 kilogram/square centimeters.
When compressed nitrogen is conducted to hornblock 129 the aforesaid combination mold sealing device from nitrogen cylinder 134, part gas flows into first mold 57, another part flows into second mold 125, like this, flow in the inner wall surface and the gap g between the solidifying shell S of two molds, because nitrogen gas pressure is higher than atmospheric pressure, does not have air and enters space g.Because of the nitrogen that consumes outside the outlet that is dissolved in the import that forms solid solution in the strand C or flow out first mold 57 or second mold 125 additional automatically by nitrogen cylinder 134.
Figure 11 represents a kind of simplification modification of the sealing device between first mold 57 and second mold 125 shown in Figure 9.The difference of the sealing device of this simplification and device shown in Figure 9 is that it does not have insulating space.That is, the inlet end face of the exit end face of first mold 57 and second mold 125 directly contacts with each other, and the centre is provided with sealing ring.One nitrogen enters in each hornblock 129 that hole 132 is arranged on second mold 125, and nitrogen infeeds pipe 133 and is connected in the import that nitrogen enters hole 132.Because the joint between first mold 57 and second mold 125 is incomplete and air is isolated, the nitrogen pressure that infeeds wherein is set in than high about 6 to the 10 kilogram/square centimeters of atmospheric pressure, is higher than the pressure in the sealing device as shown in Figure 9.
Below narration is arranged on several local modification of the sealing device of mold entrance point.
In variant embodiment shown in Figure 12, two sealing rings 139 radially are contained in the ring packing ring recess of leaving on the flange 25 of mold 24 138 doubly.This double-sealing device that two sealing rings 139 are arranged can more effectively stop the infiltration of air.One is arranged on its exit end face with the coaxial circumferential groove 142 of the inner surface of adapter ring 141.Circumferential groove 142 is in the inboard of seal groove 138.The heat that flows to its outside from the inboard of the adapter ring 141 that contacts with motlten metal M streamed circumferential groove 142.This just makes the temperature rise of sealing ring 139 keep moderate, thereby avoids overheated.
Figure 13 is that a sealing ring 148 is contained in the variant embodiment between tundish 10 and the mold 24, and this sealing device is to be used for less conticaster.Tundish 10 and mold 24 only be connected with in a tundish nozzle 12, disconnect ring 22 and heat resistant joint ring 144.Sealing ring 148 is contained between tundish 10 and the mold 24, and tundish 10 and mold 24 are connected rather than get very and open by connector seldom.One annular lip 145 is located on the steel casing 11 of tundish 10 front portions.One ring packing ring recess 147 is arranged on the external peripheral surface of flange 25 of mold 24, and sealing ring 148 dresses within it.Sealing ring 148 matches with annular lip 145.144 front portions that are welded in tundish nozzle 12 of heat resistant joint ring, disconnecting ring 22 is to be embedded in the import of mold 24.What represent among the figure is the situation that mold 24 is installed in tundish 10 before casting.In this assembling, annular lip 145 helps the location (aligning) of mold 24.Because sealing ring 148 is contained on the excircle of flange 25, rather than is installed on the end face of mold 24, so sealing ring 148 can not drop before tundish 10 and mold 24 assemblings are finished.And the sealing ring 148 of An Zhuaning can absorb the scale error of each connector and the difference and because the variation of the pressure of contact surface that thermal expansion or other reasons cause of each fit dimension like this.
Figure 14 represents to stop air to enter the structure of mold 24 by the part of topped adapter ring 18.Be bonded in an annular stainless iron thin slice 151 on the mold side end face 18a of adapter ring 18, and within sealing ring 150.The thickness of stainless steel thin slice 151 is 50 μ m.For preventing to make sealing ring 150 overheated from the heat that stainless steel thin slice 151 transmits, the external diameter of ring stainless steel thin slice 151 is less than the internal diameter of sealing ring 150.This hermetically-sealed construction is applicable to that the air by outer surface 18c infiltrates and is limited by the height airtight joint between the tundish side end face 18b of sliding door 15 and adapter ring 18 and adapter ring 18 has the occasion of suitable thickness.Ring stainless steel thin slice 151 can stop air partly to penetrate in the insulating space 51 that is sealed by sealing ring 150 from adapter ring 18 the thin of itself.
Figure 15 represents to stop air to infiltrate another embodiment of mold 24 by the outer surface that covers adapter ring 18.Mold side end face 18a, tundish side end face 18b and the outer peripheral face 18c of adapter ring 18 all are coated with a stainless steel thin slice 153.This hermetically-sealed construction is applicable to that adapter ring 18 itself has very high permeability and sealing ring 150 not to be exposed to the occasion that can bear the temperature of the limit above it.When sealing ring 150 was sealed on the periphery of flange 19 of adapter ring 18, the tundish side end face 18b and the outer peripheral face 18c of adapter ring 18 can cover stainless steel thin slice 153.
However the mold among all embodiment that narrated all is a horizontal positioned, but has represented a kind of mold of vertical placement among Figure 16.The inner surface of the outside framework 161 of adapter ring 158 and the intimate of flange 159 are fitted, and the bottom surface of adapter ring 158 outside frameworks 161 and the inlet end face of mold 166 also will fit tightly.Annulus 168 without sealings such as sealing rings is arranged between the inlet end face of the flange 159 of adapter ring 158 and mold 166.The one nitrogen feeding hole 162 that is arranged in adapter ring 158 outside frameworks 161 is communicated with annulus 168.As aforesaid most preferred embodiment, pressure is controlled at the nitrogen that is about 6 to 10 kilogram/square centimeters and infeeds annulus 168 and penetrate in the mold 166 to stop air.Figure 16 represents owing to extract the situation that solidifying shell S has just separated from the end face that disconnects ring 164 intermittence of strand out.
Table 1 has provided and cast diameter under the various casting conditions on the horizontal caster shown in Figure 5 is the result of 170 millimeters various circular steel billets.Strand was intermittently extracted out every 0.5 second, and amplitude is 15 millimeters, and average draw speed is 1.8 meters/minute.
Can be clear that from table 1 the casting number of bubbles that is formed by continuous cast method of the present invention is significantly less than the number of bubbles of conventional method less than 3.6%.The bubble that continuous cast method of the present invention forms in per 500 square centimeters surface can be more than 10.Few like this bubble needn't be removed from strand.
Table 1-1
| Numbering | The cast steel type | The inlet side of mold | |||
| There is not insulating space | Insulating space is arranged | ||||
| Be conducted to the tolerance or the pressure drop of first insulating space | Be conducted to the tolerance of second insulating space | ||||
| The gas liter/minute | The gas liter/minute | Pressure drop. torr | The gas liter/ |
||
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | SUS304 SUS304 SUS316 steel SUS304 SUS321 SUS304 SUS304 SUS304 SUS304 SUS304 steel SUS304 SUS304 SUS304 SUS304 SUS304 SUS430 SUS304 | N 2600 — — — — — — — — — N 2300 N 2600 — — — — — — — | — N 2100 N 2400 N 2300 C400 NH 3300 — — — — — — N 2300 — N 2100 — — — — | ------pressure drop 50 pressure drops 160--------- |
— — — — — N
2300 N
2400 CO300 — — — — — N
2300 |
| 20 21 22 23 24 25 | SUS304 steel SUS304 SUS304 SUS304 SUS304 | — — — — — — | — Ar200 Ar200 — Ar200 Ar200 | — — — — — — | — — Ar110 — — Ar110 |
Table 1-2
| Numbering | The outlet side of mold | Number of bubbles in the strand (500 in flat upright centimetre) | Remarks | |
| There is not insulating space | Insulating space is arranged | |||
| The gas liter/minute | The gas liter/ |
|||
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | — — — — — — — — N 2600 — N 2400 N 2500 — — — — — — — | — — — — — — — — — N 2200 — N 2200 NH 3300 N2100 N 2300 NH 3400 CO200 N 2200 — | 26.9 19.1 16.7 23.9 21.8 21.3 14.1 18.8 21.1 19.2 1.3 0.8 0.18 0.12 0.10 0.08 0.10 0.06 0.07 | The |
| 20 21 22 23 24 25 | — — — — — — | — — — — Ar150 Ar150 | 265.1 330.0 410.0 913.3 926.5 1225.1 | The conventional method of contrast |
Claims (34)
1. continuous casing, continuously supply with deposite metal (M) from cast gate (10) to the cooling mold (24) that possesses entrance and exit by the disconnection ring (22) that is connected with casting mold (24) inlet, deposite metal (M) directly and continuously is cooled because of mold (24) in mold (24), make solidifying of deposite metal (M) from beginning of molten metal surface below and formation strand (C), extract strand (C) out from the relative mold of mold (24) outlet side (24) off and on, it is characterized in that with mold (24) and disconnect the contact-making surface that encircles (22) isolating around the inlet of mold (24) and mold (24) inside, simultaneously supply with superatmospheric sealing gas, often supply with than the low solubility sealing gas that dissolves in motlten metal (M) of static pressure that disconnects near the motlten metal (M) of ring (22) to the whole inlet of above-mentioned mold (24) to the whole entrance and exit of described mold.
2. according to the described method of claim 1, it is characterized in that being provided with diameter in abutting connection with mold (24) inlet is the border and insulating space isolated from atmosphere (36) than mold (24) and the big closed surface of maximum gauge that disconnects the contact-making surface that encircles (22), in addition, in this insulating space (36), often provide above atmospheric pressure, and than the low meltability sealing gas of static pressure that disconnects near the motlten metal (M) of ring (22).
3. according to the described method of claim 1, it is characterized in that being provided with diameter at adjacency mold (24) inlet is the 1st insulating space (95) on border than mold (24) and the big closed surface of maximum gauge that disconnects the contact-making surface that encircles (22), with the 2nd insulating space (111) that the 1st insulating space (95) is included in the isolated and isolated from atmosphere of its inboard and the 1st insulating space (95), force down than atmosphere keeping in the 1st insulating space (95), often in the 2nd insulating space (111), supply with superatmospheric meltability sealing gas.
4. according to the described method of claim 1, it is characterized in that often the space between mold (24) inner peripheral surface and strand (C) outer peripheral face, edge provide superatmospheric solubility sealing gas full week from mold (24) outlet side.
5. according to the described method of claim 1, it is characterized in that being provided with diameter in abutting connection with mold (24) outlet is the border and insulating space isolated from atmosphere (36) than the big closed surface of mold (24) internal diameter, respectively the frequent superatmospheric solubility sealing gas of supply to insulating space (36) in.
6. according to the described method of claim 1, it is characterized in that often around above-mentioned mold (24) inlet and from the space of mold (24) outlet side between mold (24) inner peripheral surface and strand (C) outer peripheral face, supplying with respectively surpassing the solubility sealing gas that atmospheric pressure dissolves in molten metal (M).
7. according to the described method of claim 1, it is characterized in that being provided with diameter in abutting connection with mold (24) inlet is the border than mold (24) and the big closed surface of maximum gauge that disconnects the contact-making surface that encircles (22), insulating space (36) with isolated from atmosphere, being provided with diameter in abutting connection with mold (24) outlet is the border and insulating space isolated from atmosphere than the big closed surface of mold (24) internal diameter, often in the insulating space (36) of above-mentioned mold (24) entrance side, supply with and surpass atmospheric pressure, be lower than and disconnect near the deposite metal (M) of ring (22) static pressure, dissolve in the solubility sealing gas of motlten metal (M), often supply with superatmospheric solubility sealing gas to the insulating space of above-mentioned mold (24) outlet side.
8. method according to claim 1, it is characterized in that being provided with diameter in abutting connection with mold (24) inlet is the border and insulating space isolated from atmosphere than mold (24) and the big closed surface of maximum gauge that disconnects the contact-making surface that encircles (22), to keep below atmospheric pressure in this insulating space, being provided with diameter in abutting connection with mold (24) outlet is the border and insulating space isolated from atmosphere than the big closed surface of mold (24) internal diameter, when keeping below atmospheric pressure, often in this insulating space of mold (24) outlet side, supply with superatmospheric the insulating space (36) of above-mentioned mold (24) entrance side, dissolve in the solubility sealing gas of motlten metal (M).
9. method according to claim 1, it is characterized in that being provided with diameter in abutting connection with mold (24) inlet is the 1st insulating space (95) on border than mold (24) and the big closed surface of maximum gauge that disconnects the contact-making surface that encircles (22), and above-mentioned the 1st insulating space (95) is included in its inboard, isolate with the 1st insulating space (95), the 2nd insulating space (111) of also isolating with atmosphere, to keep below atmospheric pressure in the 1st insulating space (95), often supply with and surpass atmospheric pressure to the 2nd insulating space, dissolve in the solubility sealing gas of motlten metal (M), in addition, being provided with diameter in abutting connection with mold (24) outlet is the border than the big occluding surface of mold (24) internal diameter, with the insulating space of isolated from atmosphere, often in this insulating space, supply with above atmospheric pressure, dissolve in the solubility sealing gas of motlten metal (M).
10. according to the described method of each claim in the claim 1 to 9, it is characterized in that described sealing gas is a nitrogen.
11. the continuous casting apparatus that the described method of enforcement claim 1 is used comprises the cooling mold (24) that possesses entrance and exit, the cast gate (10) that links to each other with mold (24) by the disconnection ring (22) that is connected with mold (24) inlet, contact-making surface with mold (24) and disconnection ring (22) enters the mouth mold (24) on every side and mold (24) internal insulation, with mold (24) motlten metal (M) in the mold (24) is cooled off, make motlten metal (M) begin to solidify to form strand (C) below the surface from it, off and on strand (C) is extracted out from the relative mold of mold (24) outlet side (24) with drawing mechanism (56), in addition, also comprise and center on mold inlet and/or export the mechanism that supplies with the sealing gas that surpasses atmospheric pressure, it is characterized in that the mechanism of described supply sealing gas is for often to the entire circumference supply pressure superatmospheric pressure of above-mentioned mold (24) inlet and be lower than the mechanism (40) of the solubility sealing gas that dissolves in motlten metal (M) of the static pressure that disconnects near the motlten metal (M) the ring (22);
12. device according to claim 11, it is characterized in that going into the maximum gauge ring-type insulating space big and isolated from atmosphere (36) of interruption-forming diameter, often supply with the superatmospheric solubility sealing gas that dissolves in motlten metal (M) to ring-type insulating space (36) with said mechanism (40) than the contact-making surface of mold (24) and disconnection ring (22) at mold (24).
13. device according to claim 11, it is characterized in that the maximum gauge big 1st annular isolation space (95) of diameter than the contact-making surface of mold (24) and disconnection ring (22) being set respectively at mold (24) inlet, with the 1st insulating space (95) is included in its inboard, and and the 1st insulating space (95) while and the 2nd all isolated annular isolation space (111) of atmosphere, with said mechanism (40) above-mentioned the 1st insulating space (95) is kept below atmospheric pressure, often supply with the solubility sealing gas that dissolves in motlten metal (M) above atmospheric pressure to above-mentioned the 2nd insulating space (111).
14. device according to claim 11 is characterized in that often supplying with the solubility sealing gas that surpasses atmospheric pressure, dissolves in motlten metal (M) in the space between the outer peripheral face of inner peripheral surface that centers on mold (24) and strand (C) with described mechanism (40) from the outlet side of mold (24).
15. device according to claim 11, it is characterized in that the outlet side insulating space (51) that the diameter that forms at the outlet side of mold (24) is bigger than the internal diameter of mold (24), be arranged on mold (24) outlet side and isolated from atmosphere, with said mechanism (40) often in insulating space (51) supply above the solubility sealing gas of the be fused to motlten metal (M) of atmospheric pressure.
16. device according to claim 11, it is characterized in that using respectively described mechanism (40) often around entering the mouth, to supply with and surpass the solubility sealing gas that atmospheric pressure dissolves in motlten metal (M), and in the space of mold (24) outlet side between mold (24) inner peripheral surface and strand (C) outer peripheral face, supply with the solubility sealing gas that dissolves in motlten metal (M) above atmospheric pressure around mold (24).
17. device according to claim 11, it is characterized in that forming diameter than mold (57) with disconnect the sealing mechanism entrance side insulating space (34) and isolated from atmosphere of the big ring-type entrance side that is arranged on mold (57) entrance side of the maximum gauge of contact area of ring (22), supplies with to the insulating space of mold (57) entrance side in feed mechanism (40) and surpass atmospheric pressure, ratio disconnection and encircle the solubility sealing gas that near the static pressure of (22) motlten metal (M) is low, can be fused to motlten metal (M) at the entrance side of mold (57); Form at mold (57) outlet side, diameter is bigger than mold (57) internal diameter, be arranged on the sealing mechanism outlet side insulating space (44) and isolated from atmosphere of mold (57) outlet side, supply with the solubility sealing gas that dissolves in motlten metal (M) above atmospheric pressure to the outlet side insulating space of mold (57) with feed mechanism (40).
18. device according to claim 11, it is characterized in that, go into the interruption-forming diameter than mold (57) with to disconnect the contact-making surface maximum gauge of ring (22) big at mold (57), be arranged on the outlet side sealing mechanism entrance side insulating space (94) and isolated from atmosphere (95) of mold outlet side, to keep below atmospheric pressure in the entrance side insulating space (95) with mechanism (104), it is bigger than mold (57) internal diameter in the outlet of mold (57) diameter to be set, be arranged on the ring-type outlet side sealing mechanism outlet side insulating space (116) and isolated from atmosphere of casting mold (57) outlet side, in this outlet side insulating space, often supply with the solubility sealing gas that dissolves in motlten metal (M) above atmospheric pressure with said mechanism (40).
19. device according to claim 11, it is characterized in that, it is bigger than the maximum gauge of the contact-making surface of mold (57) and disconnection ring (22) to form diameter respectively at mold inlet, be arranged on the 1st insulating space (95) of ring-type the 1st sealing mechanism of mold (57) inlet, and the 1st insulating space (95) is included in its inboard, ring-type the 2nd sealing mechanism (106 that is arranged on mold (57) inlet with isolated from atmosphere, 109) the 2nd insulating space (111), and it is bigger than mold (57) internal diameter in mold (57) outlet diameter to be set, outlet side insulating space with isolated from atmosphere, in this outlet side insulating space and above-mentioned the 2nd insulating space (111), often supply with the solubility sealing gas that dissolves in motlten metal (M) above atmospheric pressure respectively with said mechanism (40), will keep below atmospheric pressure in above-mentioned the 1st insulating space (95) with mechanism (104).
20. the described device of arbitrary claim according in the claim 11 to 19 is characterized in that it is level that its axis is arranged in mold (24), (57), (61).
21. according to the described device of arbitrary claim in claim 11 or 12 or 13, it is characterized in that, described mold is made up of second mold (61) that one first mold (57) and is connected in first mold (57) outlet, intermediate seal device (116) is arranged between first mold (57) and second mold (61), this intermediate seal device (116) forms one and stops air between first and second molds (57) and (61), by infiltrating the intermediate isolating space of first mold (57) between two molds, in addition, comprise that also often supply surpasses the device (40) that atmospheric pressure dissolves in the solubility sealing gas of motlten metal (M) to the intermediate isolating space.
22. device according to claim 21 is characterized in that, second mold (61) can be made up of along the die piece that moves radially (62) of mold (61) a plurality of.
23. the described device of arbitrary claim according in the claim 11 to 19 is characterized in that, above-mentioned sealing mechanism (34,94,109,116) comprises the seal washer of being made by silicon rubber.
24., it is characterized in that above-mentioned sealing gas is a nitrogen according to the described device of arbitrary claim in the claim 11 to 19.
25., it is characterized in that the used pressure in the insulating space (95) that makes keeps below the vavuum pump (104) of atmospheric device for being connected with insulating space (95) by pipe arrangement according to claim 13 or 18 or 19 described devices.
26., it is characterized in that by the adapter ring (18,84,141) that is connected with disconnection ring (22) tundish (10) being linked to each other with mold (24), (57) respectively according to the described device of arbitrary claim in the claim 11 to 19.
27. device according to claim 26 is characterized in that, by forming described insulating space with ring packing packing ring between the entrance face that is sandwiched in adapter ring and mold (24) around the mode that disconnects ring 22.
28. device according to claim 26, it is characterized in that also comprising the ring-type hollow air ring (88) that is provided with along above-mentioned adapter ring (84) periphery, around disconnect ring (22) and be sandwiched in hollow air ring (88) and the inlet end face of mold (57) between, form the sealing ring (94) of insulating space (95) and be used for cooling off the feed mechanism (91) of air to hollow air ring (88) supply.
29. device according to claim 27, it is characterized in that on adapter ring (141) outlet side end face being provided be positioned at sealing ring (139) inboard concentric with adapter ring (141), annular groove (142), this circumferential groove (142) can suppress the temperature rising of seal washer (139).
30. according to the described casting apparatus of arbitrary claim in the claim 11 to 19, it is characterized in that disconnecting ring (22) joins by tundish (10) nozzle that seal washer and tundish (10) export, go up the setting annular lip (145) concentric at the steel plate (11) of tundish (10) port of export with the nozzle of tundish (10), by the sealing ring (148) in the annular seal groove (147) that inserts on the flange periphery that is arranged on mold (24) is contacted with the inner circumferential surface of described annular lip (145), form described insulating space.
31. according to claim 12,13,17, the described device of arbitrary claim in 18 and 19, it is characterized in that between tundish (10) and mold (57), surrounding wall (106) being set, the double wall (107) face-to-face and concentric with setting and surrounding wall (106), the top that makes surrounding wall (106) contacts with sealing ring (109) in being inserted in the annular groove (108) that is formed by double wall (107), form sealing device by above-mentioned these members, sealing device forms insulating space (36), (95), (111) thus.
32. casting apparatus according to claim 31, it is fixing to it is characterized in that making in tundish (10) or mold (24), (57), (61) any to make as a side, makes the opposing party wherein can be along moving on the extraction direction of strand (C).
33. casting apparatus according to claim 27 is characterized in that the part of internal diameter one side of the seal washer (150) of the front end face of adapter ring (18) is covered with seal (151).
34. casting apparatus according to claim 27 is characterized in that the outer surface of adapter ring (18) is covered with seal (153).
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP209299/90 | 1990-08-09 | ||
| JP20929890A JPH0685980B2 (en) | 1990-08-09 | 1990-08-09 | Sealing device for mold connection in horizontal continuous casting machine |
| JP20929990A JPH0685981B2 (en) | 1990-08-09 | 1990-08-09 | Mold entry side sealing device in horizontal continuous casting machine |
| JP209298/90 | 1990-08-09 | ||
| JP12560/91 | 1991-01-11 | ||
| JP77690/91 | 1991-04-10 | ||
| JP77691/91 | 1991-04-10 | ||
| JP51409/91 | 1991-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1060421A CN1060421A (en) | 1992-04-22 |
| CN1031557C true CN1031557C (en) | 1996-04-17 |
Family
ID=26517355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105622 Expired - Fee Related CN1031557C (en) | 1990-08-09 | 1991-08-09 | Method and apparatus for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031557C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001469A (en) * | 2016-07-05 | 2016-10-12 | 西安理工大学 | Horizontal continuous casting crystallizer of cast iron and preparing method of cast iron proximate matter |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5944211B2 (en) * | 2012-04-19 | 2016-07-05 | スチールプランテック株式会社 | Mold change device for continuous casting equipment |
| CN102974784A (en) * | 2012-12-10 | 2013-03-20 | 陕西华安铸铁型材有限公司 | Continuous casting production device of cast iron bar with thick and large cross section |
| CN110153388A (en) * | 2019-06-21 | 2019-08-23 | 苏州大学 | A kind of method of air blister defect in reduction continuous casting billet |
| CN113870458B (en) * | 2021-10-26 | 2023-05-30 | 中冶赛迪工程技术股份有限公司 | Method for constructing degradation data of vibration performance of crystallizer vibration device |
-
1991
- 1991-08-09 CN CN 91105622 patent/CN1031557C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106001469A (en) * | 2016-07-05 | 2016-10-12 | 西安理工大学 | Horizontal continuous casting crystallizer of cast iron and preparing method of cast iron proximate matter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1060421A (en) | 1992-04-22 |
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