SU1100040A1 - Metal continuous casting arrangement - Google Patents

Abstract

A DEVICE FOR CONTINUOUS METAL CASTING, containing a metal reservoir, a mold, a cooled surface located between them, a secondary cooling zone, and stretching and cutting mechanisms, which, in order to eliminate the tears of the ingots casing, cool the surface made in the drive rolls, joined to all the walls of the mold and the metal reservoir, while the cross section of the metal reservoir in the plane of the dock with the rollers corresponds to the cross section of the mold. (L

Description

The invention relates to metallurgy, namely, to non-linear casting of metals. A device for continuous casting is known, containing an intermediate 5 ladle and fl rolls. A disadvantage of the known device is the low quality of the surface and the internal structure of the blanks due to the reduction of the metal in the two-phase state. It is also known a device for continuous casting containing a metal receiver, a mold and. rolls. installed under the crystallisator C2115

A disadvantage of the known device is the presence of a junction between the metal receiver and crystallized metal, which, as a rule, leads to tears in the shell of the hardening ingot at the joint of the refractory and the cooling surface and thus to the stability of the casting process.

The closest in technical essence and achievable result to the proposed is a device for continuous casting of metals, containing a metal reservoir, a mold, a cooled surface in the form of a tape, located between them, a secondary cooling zone and stretching and cutting mechanisms Cz.

A disadvantage of the known device is the possibility of tearing on the forming shell of the ingots.

The purpose of the invention is the elimination of the shell of ingots.

The goal is achieved by the fact that in the device for continuous times-40

metal pouring, containing a metal reservoir, a crystallizer, a cooled surface located between them, a secondary cooling zone and stretching and cutting mechanisms, a cooled surface is made in the form of drive rolls joined to all walls of the crystallizer and a metal reservoir, while the cross section of the metal receiver in the plane of the joints, 50 ki with rollers corresponds to the cross section of the mold.

FIG. 1 shows the device, a general view; in fig. 2 — junction unit of drive rolls with a metal receiver and a crystallizer.

The device for continuous casting of metals consists of metal-forging with rolls similar to the section of the mold.

The device works as follows.

From the casting ladle, the liquid metal is poured into the metal receiver 1, through which it enters the mold 4, where the seed is installed. During the casting process, with the beginning of pulling the seed out of the mold, the rolls 3 are rotated at a given speed of movement of a point on their surface within (1-5) of the pull rate of the ingot 8, which crystallizes on their surface the crust moves to the mold 4, where there is a further increase in the shell of the ingot 8, then - the ingot hardening in the secondary cooling zone 6 and cutting into the blanks by the cutting mechanism 7.

An example of the process of pouring.

On the experimental machine a semi-metallizer with a section of 200x250 p4, above which with a gap of 38 mm, a metal reservoir is installed, lined in the lower part with graphite-alumina plates. The gap between the plates and the mold on all four sides is blocked by drive rolls with a diameter of 100 mm, while the roll arc in the gap is 0 ,. In the collector, rapeseed oil is located around the junction between the rolls and the metal receiver.

When casting heat-resistant steel (ОХ23Н18) metal is supplied from the casting ladle similarly. The ingot is pulled at a speed of -0.6 m / min, and the rolls are rotated at a speed of 10 rpm (3 m / min). The casting process proceeds normally, discharges on the surface of the receiver 1, made in the form of a box lined with refractory plates, cooled drive rolls 3, mold 4, collector 5 for supplying protective lubricant to the gap between one of the plates 2 and one of the rolls. 3, the secondary cooling zones of the ingot 6 extraction and cutting 7 ingot 8 on the workpieces 9. The rolls 3 are joined to all the walls of the mold 4 and the metal receiving plates 2 along arcs whose radius is 1-2 mm larger than the rolls radius and the cross section of the metal receiving cavity in there is no criss-mounted place in the place of continuous casting, cracks in the subcortical layer are also absent.

If the 12Kh18N9T steel is cast as a base object into a mold with a section of 180x500 mm with a production volume of 50 thousand tons / year, where the scrap of the workpieces is 1.5% and the metal consumption for gouging the surface is 60 kg / t, then the economic effect

A reduction in metal consumption is determined by reducing scrap by 0.5% and gouging volume by 20 kg / ton. Having accepted the cost of 1 ton of cast billets equal to 960 p., And the cost of the charge 300 p. / T, they determine the cost reduction at. metal saving

50000 / 0.02 (960-300) 4-0.05 (960-300)

2,1 mln.

Claims (1)

DEVICE FOR CONTINUOUS METAL Pouring, containing a metal receiver, a crystallizer, a cooled surface located between them, a secondary cooling zone and drawing and cutting mechanisms, characterized in that, in order to eliminate tears of the ingot shell, the cooled surface is made in the form of drive rolls joined to all the walls of the mold and the metal detector, while the cross section of the metal detector in the plane of connection with the rolls corresponds to the cross section of the mold.