SU710768A1 - Apparatus for continuous casting of blanks from two or more melts - Google Patents

Description

 I

The invention of ognosigs to megalpur and, in particular, to the continuous casting of ingots from two or more metals.

A device for continuous casting of blanks of two or more metals, containing outer and inner molds located concentrically, and the length of the inner mold is less than the length of the outer 1.

Such an embodiment of the device leads to instability of the process and the formation of a crust of the inner metal by race, which is easily melted in the upper part of the outer crystallizer in the region where strong convective currents still exist. This results in both disruption of the process and undesirable mixing of metals in the liquid state.

The purpose of the invention is to improve the crystallization conditions and improve the quality of the blanks.

To achieve this goal, the outer crystallizer is made of a length equal to 3-4 sizes of its cross section, and the inner crystallizer is made of a length not less than five sizes of the cross section of the outer crystallizer.

On ({d. 1 shows the proposed device, a general view; in Fig. 2 - node A 4vg. 1.

Claims (1)

The device consists of a water-cooled external crystallizer 1, which may be circular, rectangular, shaped, or any shape. The mold 1, depending on the shape, has the ability to make reciprocating or reciprocating movement. Into the crystallizer 1, feed the melt with the help of the refractory system 2 melt, from which the cladding or outer shell of the ingot is subsequently formed. The internal water-cooled copper crystallizer 3 is located inside the crystallizer 1 and simultaneously performs a reciprocating or puffy or return-poshepogely movement. The mold 3 has a through internal hole of a round, rectangular, shaped or any other shape, the cross-sectional area of which is assumed to be an even cross section of the main drain or the core of the ingot, into the cathora the melt is fed through the refractory system 4. The internal crystallizer 3 in which the main ingot or core is formed the ingot and the outer mold 1 have a length equal to 5 and 3-4, respectively, the cross-sectional dimensions of the mold or the diameters and thicknesses of the cast billets. The mold 3 can move down along the vertical axis depending on the speed of melting, gemperagury of melts and their physical properties, providing regulation of the process or full spreading of the inside of the cladding shell of the hardened crusts 5 (a crust that can form along its outer perimeter. To increase the intensity of cooling of the inner crust of the outer ingot and an increase in the amount of heat removed from the melt of the outer ingot, the inner crystallisate has in its lower part grooves 6 The steam cooler is directly applied to the inner crust of the outer and outer crust of the inner ingot. The process can be carried out with the formation of a skull on the outer surface of the inner crystallizer, and with the formation of the inner shell of the outer ingot if conditions are created for melting the crust 7 of the inner ingot. The device works as follows: The metal is fed through system 4 to the mold 3 to a certain level and forms a solidified crust on the wall 8. The mold 3 is then It is positioned in such a way that its lower cut is higher than the lower cut of the crystallizer 1. Zatragzh 9 begins to flow out of the crystallizer 3 to the level at which the top layer of the seed is located at the same level as the lower slice of crystallized 1. At this point, a cladding melt is introduced into the crystallizer 1 and the seed 9 of the crystallizer 1 begins to move along with the seed 10. As soon as both the seed seeds begin to move together, the level of the flow in the crystallizer 1 is lowered to the level of the lower slice of the crystallizer 3, so that the hot melt that touched the formed workpiece 7, After that, the mold 3 is lowered down behind the outgoing seeds to the level when its lower cut is lower than the lower cut of the mold 1. Simultaneously with the lowering of the mold 3 in the specified working position, the level of the meniscus in the mold 1 rises to the working position , which allows to form a garlic 5 on the wall 11 of the mold 3. Formula of the invention. A device for continuous casting of blanks from two or more melts of different or the same imicheskogo composition, and comprising an inner molds arranged concentrically, wherein the heme that in order uluchshesh crystallization conditions and increasing the quality of the preforms, the outer mold vypo; its length is equal to 3-4 sizes of its cross section, and the inner law caseizer is a length equal to HG less than five sizes of the cross section of the outer crystallizer. Sources of information taken into consideration at the examination 1. Herman E. Nep (double-headed casting. M., 1961, p. 324, p. 911.