CN1120985A - Continuous casting method and apparatus - Google Patents

Abstract

The present invention can raise the withdrawing rate from present several meters each minute to several meters each second. Molten metal is poured via a duct into cast cavity formed by two moulds, moved from the inlet to the outlet under the action of loading, and cooled by the cooling water through the moulds to obtain casting blank, which is separated automatically at the outlet of the moulds. The present invention may be matched with continuous rolling to realize continuous production.

Description

Continuous cast method and equipment

The present invention relates to a kind of continuous casting technology field, especially a kind of continuous cast method and equipment.

Present continuous cast method general adopts whole water mold, the continuous molten steel that injects in crystallization, after catching a cold, molten steel in crystallizer, crusts, and constantly be drawn out crystallizer, and continue to be cooled to strand, its problem of this method is, when casting speed surpasses certain limit, because crystallization rate does not catch up with, during the bad disengaging of casting crystallizer, crackle can appear, cause molten steel to spill, thereby limited development of productivity.To disclose a kind of " continuous cast method and equipment " application number be that 92109871.5 contents are to Chinese patent in addition: it has from crystallizer the drawing strand and supplies with the deposite metal by a continuous cooling mold to an import and an outlet are arranged of the disconnection ring that contacts with the mold import at least from a tundish, make the deposite metal begin to be solidified to form strand below the surface by the deposite metal in the continuous cooling mold at it, in casting process, be higher than atmospheric pressure and melt continuous cast method and the equipment that constantly supplies the whole contact area of people's mold and disconnection ring in the sealing gas of metal with pressure, it is characterized in that: a kind ofly be filled into crystallization 5 by pouring attachment 4 by the sprue gate and cast in the chamber with the molten metal that following crystallizer device 1 constitutes, last crystallizer is fixed, following crystallizer 1 moves relative to going up crystallizer 5 in groups, make under the cooling of molten metal cooling water in crystallizer up and down and form strand, and the casting process of disengaging strand automatically when making down crystallizer 1 move to horizontal control track.

The present invention has overcome the above-mentioned not bright and clean and restricted problem of casting speed of strand upper surface that fixedly causes because of last crystallizer, and has designed a kind of continuous cast method and equipment.

The purpose of this invention is to provide that a kind of continuous casting casting speed can be greater than 1 meter of each second, and can be directly and the continuous cast method and the equipment of tandem mill assembly cover, provided and a kind ofly can hold the molten metal cavity by what crystallizer up and down constituted, and along cast synchronization-moving continuous cast method of conduit and equipment.

The present invention adopts this quadrat method to realize, continuous cast method and equipment are by the cast gate of pouring into a mould intubate molten metal to be poured in the pouring attachment, under the control of molten metal fluid level controller, form the metal bath surface of constant altitude, molten metal is filled into by in the molten metal mould cavity that crystallizer constitutes up and down by the cast gate of cast conduit under constant compression force, and crystallizer can constitute the chamber type of difformity specification up and down.Crystallizer is movable type up and down, each is made up of several identical monomers, make crystallizer on conduit, make up butt joint, the cavity surface after the butt joint and the surface of conduit match, and it is slided to its cast gate place along conduit, outside cast gate, form the mould cavity that moves of an any surface finish, by conduit and cast gate thereof continuous in mould cavity, pour into molten metal, molten metal is same moved further under the loading of crystallizer mould cavity, and in crystallizer, be solidified into strand under the cooling of cooling water, and make the casting process of moulding adobe blocks automatically when crystallizer moves to return trajectory up and down.

Whole process can be controlled by computer automatic monitoring, comprises the fault automatic inspection, the automatic replacing of defective crystallizer etc.

Structure of mould is type selecting by the needs of the strand of production difformity specification, can produce the various continuous casting billets of wirebar, section bar base, sheet material base, profile shapes base and nearly end form shape.

Because strand is synchronization-moving under the loading of crystallizer, strand is not subjected to the effect of pulling force and frictional force, and any surface finish is not by the danger of bleedout, along with the lengthening of shift motion, strand has enough cool times, can ensure that strand has enough intensity and very high casting speed.Can bring up to each second to the continuous casting casting speed more than 1 meter very easily.

The present invention has reasonable in design, the characteristics of complete process, the quality and the casting speed of continuous casting billet have been improved greatly, the high-speed continuous casting base is after continuing cooling and surface temperature equilibrium treatment, can directly import the tandem rolling unit, can realize the continuous casting and continuous rolling integration continuous flow procedure of high-speed high benefit, saved the post bake process of the strand in the traditional mode of production, and breaking down cogging process, the equipment and the energy have been saved, cutting head cutting tail loss when more having deducted the oxidation loss that strand produces because of post bake and having become a useful person scale, improved lumber recovery and production efficiency, productivity effect is increased exponentially.

Embodiments of the invention are provided by the following drawings

Fig. 1 is a general structure schematic diagram of the present invention

Fig. 2 is cast conduit of the present invention and cast gate thereof and the A of crystallizer-A sectional structure schematic diagram up and down

Fig. 3 is cast intubate of the present invention, pouring attachment, conduit and cast gate and the B of crystallizer-B sectional structure schematic diagram up and down

Below in conjunction with accompanying drawing, embodiments of the invention are further described:

See that Fig. 1,2,3 look, continuous cast method and equipment be in the tundish 1 molten metal through the cast intubate 2, be poured in the pouring attachment 3, under the effect of molten metal fluid level controller, form the metal bath surface of constant altitude, make molten metal under constant compression force, be filled in the mould cavity that constitutes by last crystallizer 6 and following crystallizer 5 through conduit 4 and cast gate 15 thereof.The chamber type of crystallizer one-tenth difformity capable of being combined specification up and down, 6 times crystallizers 5 of last crystallizer are loading the same moved further of molten metal, make under the cooling of molten metal cooling water in crystallizer and be solidified into strand, and make the casting process of moulding adobe blocks automatically when up and down crystallizer 6,5 moves to return trajectory 14, the external form any surface finish of cast conduit 4 and match with mould cavity surface that 6 times crystallizers of last crystallizer 5 constitute, and can be free to slide relatively.

Crystallizer 5 under crystallizer 6 and the monomer on the monomer when initial position, under the effect of combination unit 10, be combined and be docked on the conduit 4, and along conduit 4 send into the continuous casting Operational Zone that constitutes by track 11,12 can, but firm the connecting of the connector that can separate automatically again with the leading portion crystallizer by automatic butt.Form a crystallizer group that moves continuously, and form the molten metal mould cavity that moves continuously of an any surface finish in the crystallizer group outside the cast gate 15 of conduit 4.Make molten metal (base of drawing device be arranged) during the beginning continuous casting, and, be solidified into strand under the cooling of the cooling water in 6 times crystallizers 5 of crystallizer thereon with the same moved further of its mould cavity through conduit 4 and cast gate 15 continuous being filled in its mould cavity thereof.The existing enough intensity of strand when crystallizer runs to track 14, under the effect of mould unloading machine 8,6 times crystallizers of last crystallization 5 break away from strand 7 automatically.Strand 7 is operation forward continuously on transmission roller channel 18, monomer crystallizer 6,5 after the disengaging turns back to initial position through track 14,13,11 under the effect of return conveyor group 9, by combination unit 10 6,5 combinations of monomer crystallizer are docked on the conduit 4 and along its conduit 4 again and send into the continuous casting traffic coverage that constitutes by track 11,12, under the effect of main transmission unit 16, continue to move forward.And form the casting process of reciprocation cycle according to this.

Whole process of production can be monitored automatically by computer, comprises the automatic replacing of trouble shooting and defective crystallizer etc.

The chamber type of crystallizer is along with the change of shape of strand changes, can produce wirebar, section bar base, sheet material base, special-shaped base and nearly end form shape continuous casting billet, can directly comprise that with the steel rolling unit tandem rolling unit matches, realize the continuous flow procedure of continuous casting and continuous rolling integration.

In casting process, adopt the portable crystallizer of butt joint capable of being combined, as above 6 times crystallizers 5 of crystallizer, the monomer whose crystallizer, be combined and be docked on the conduit 4, and move forward with the leading portion crystallizer along conduit and to engage, constitute a molten metal mould cavity that moves forward along conduit, molten metal is filled in its mould cavity through the cast gate 15 of conduit 4, and in crystallizer, be solidified into strand under the cooling of cooling water.Because strand is synchronization-moving under the loading of crystallizer, the not tension power effect that do not rub is so any surface finish not by the danger of bleedout, along with the lengthening of crystallizer group shift motion, has enough cool times.Casting speed is accelerated greatly, can be reached per second more than 1 meter.

Claims (3)

1, a kind of continuous cast method and equipment, it has drawing strand from crystallizer, and from a tundish at least by one with cast the disconnection ring that the Qi import contacts, the continuous cooling frame to an import and an outlet are arranged is supplied with the deposite metal, by the metal in the continuous cooling frame, make the deposite metal begin to be solidified to form the casting process of strand below the surface at it, it is characterized in that, adopt a kind of conduit and can on conduit, make up the crystallizer of butt joint, and cavity surface and catheter surface that the crystallizer after the combination butt joint is constituted match, and it is mobile to slide to its cast gate place along catheter surface, forms the molten metal mould cavity that moves forward continuously of an any surface finish outside its cast gate.And molten metal is filled in its mould cavity by conduit and cast gate thereof, molten metal in the mould cavity of crystallizer with its same moved further, and in crystallizer, be solidified into strand, the casting process that it is moulded adobe blocks automatically under the cooling of cooling water.

2, by described continuous cast method of claim 1 and equipment, it is characterized in that the shape of the mould cavity of crystallizer changes along with the change of casting blank shape.

3, press described continuous cast method of claim 1 and equipment, it is characterized in that: the external form of cast conduit and surface match with chamber type and surface that the mould cavity of back formation is docked in the crystallizer combination, and can be free to slide along its surface.

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