SU156567A1 - - Google Patents

Description

Installations for electroslag remelting of steel are known, having two pairs of shoes operating in a stepping pattern. The shoes are held, mixed, the electrode is current and current is applied to it.

The proposed installation differs from the known ones in that each pair of shoes in it is made sliding by such a distance as to skip the other pair of shoes at the time of stepping. This makes it possible to find each pair of shoes in the lowest position at the level of the mold and reduce the size of the cinder of the remelted electrode.

FIG. 1 shows an installation for electroslag remelting of steel in two projections (side view and front); in fig. 2 is a view along arrow A in FIG. one; in fig. 3 is a diagram of stepping shoes.

The installation consists of a bed 1, vertically balanced carts 2, carts 3 for rolling out an ingot, a water-cooled pallet 4, a crystallizer 5 of the evaporation system, an automatic blocking mechanism 6, guide boxes 7, carts 8 carrying current-carrying shoes, current-conducting bronze clamping shoes 9, remelting electrode 10 and welding transformer //. Two pairs of walking shoes 9 alternately hold and move the JO electrode and supply current to it.

The main feature of the installation is that when stepping, each pair of bashmak reaches the lower extreme position at the level of the mold. With

In this case, the current-carrying shoes, when released, are diverted by a distance allowing the other pair of shoes to pass, and the copper rod, which draws current from the transformer to the shoes, fits into its height and passes along the horizontal axis. The absence of current-carrying parts protruding above the bashmak allows: to reduce to a minimum the distance from one pair of shoes to another; concentrate the current supply to the electrode in a small area in the immediate vicinity of the mold; reduce the length of the electrode from the point of supplying current to the bath; reduce the length of the flexible bundle package for vertical movement of the baseman. For example, when the height of the current-carrying shoe is 60 mm, the crushing stroke is 80 mm.

The principle of operation of the stepping current-carrying shoes is as follows.

A pair of bashmakov 12 carries out the working movement of the electrode downward, simultaneously applying current to it. During this time, the other pair of shoes 13 moves upward in the opened state and, having reached the extreme upper position, waits for a command to clamp the electrode. The moment of the bypass of the working pair of shoes 12 opened by the opened pair of bachs 13 is indicated by position 14. The command to clamp the electrode by the pair of shoes 13 will arrive somewhat earlier than the pair of bachmaks 12 reach the lowest position, which ensures current overlap.

When they reach the lowest position, the pair of shoes 12 expands and goes up.

while the pair of shoes 13 carries the working movement down. The moment of the bypass of the opened pair of shoes 12 of the working pair of shoes 13 is shown at position 15. Then the cycle repeats.

Subject invention

The set-up for electroslag remelting of steel using two pairs of conductors of walking paced shoes, alternately holding and non-locating the electrode, characterized in that, in order to reduce the size of the cinder of the remelted electrode, each pair of shoes is made sliding for a distance step over another pair of shoes, ensuring that each pair is in its lowest position at the level of the mold.

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