SU1692724A1 - Device for continuous uphill casting of sheet blanks - Google Patents

Description

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(21) 4480989/02 (22) 08/01/88 (46) 11/23/1. Bul №43

(71) Institute of Electrodynamics, Academy of Sciences of the Ukrainian SSR and Uralmash Production Association

(72) A.D. Berens. IN AND. Foul. A.F. Koolnichenko, Yu.I. Mitzengendler, V.M. Nikovsky and B.A. Yushchenko (53) 621.746.27 (088.8)

(56) US Patent

Ns 4469165. Cl. B 22 D 27/02, 1984. (54) DEVICE FOR CONTINUOUS VERTICAL CASTING SHEET BILLETS

(57) The invention relates to metallurgy, more specifically to continuous casting of sheet stock. The purpose of the invention is to increase the stability of the casting process and the quality of the sheet stock by obtaining smooth edges. A device for continuous vertical casting of a sheet billet includes rotating cooling rolls-crystallizers and an electromagnetic field system located at the ends of the crystallization rolls, which is made in the form of copper DC electrodes. 2 sludge.

This invention relates to metallurgy, in particular to continuous casting of sheet stock.

The purpose of the invention is to increase the stability of the casting process and the quality of the sheet stock by obtaining smooth edges.

FIG. 1 shows the device, a general view; in fig. 2 is a diagram illustrating the occurrence of electromagnetic forces at the ends of the rolls holding the liquid metal.

The device for continuous vertical casting of the sheet stock comprises an intermediate tank 1 with liquid metal 2, a metal conduit 3, water-cooled drum-crystallizers 4 made of a non-magnetic electrically conductive material, for example copper. Up to the current source HTi and IT2, the direct current H and 2 is supplied through graphite brushes 5 to the copper electrodes 6.

The device works as follows.

Water-cooled drum-molds with a diameter of 250 mm is placed under the metal pipe. The volume of the intermediate metal container is 15dm3. The drive for rotating the reels has a power of 12 kW. The molten metal 2 from the intermediate tank 1 through the refractory metal pipe 3 enters the gap formed by the crystallizer drums 4. At the same time, constant currents are supplied to the copper electrodes 6 through the shafts of the crystallizer drum 4 from two end sides.

Then the drive is turned on for rotating the crystallization drums. The current flowing through the crystallization drums passes through the crystallizing melt and creates current densities x 0.5-3 A / mm2 in it. This current creates a vertical magnetic field B 0.05-0.15 T at the ends of the crystallization drums. The vertical magnetic field By, interacting with the horizontal electric field 1X, creates a volumetric electromagnet

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The forces of 1–25 are 103–45 104 N / m3, which prevent the metal from flowing out along the ends and form the side edge of the sheet. The sheet width of the workpiece is 300 mm, thickness is 5 mm, and the drawing speed is approximately 2 m / min.

The height of the melt column held by the electromagnetic forces in the crystallizer is 30-40 mm.

Experiments were performed on a prototype using Wood's alloy.

The proposed method provides a rather high process stability in comparison with the known one and allows to increase the yield of a suitable billet by 5% by improving the quality of the edges. Besides

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Go, process performance drops by 30-35%.

Claims (1)

Apparatus of the Invention A device for continuous vertical casting of a sheet billet comprising horizontally mounted drums-crystallizers and an electromagnetic system located at their ends for holding a liquid metal, characterized in that, in order to improve the stability of the casting process and the quality of the sheet billet due to even edges, the electromagnetic system for holding the liquid metal is made in the form of copper DC electrodes. FIG. 2