SU854559A1 - Apparatus for bottom pouring of steel - Google Patents

Description

The invention relates to ferrous metallurgy, more specifically casting of steel in molds. In order to increase the yield of metal in ingots, poured from above into the downwardly extending molds, among other things, tiller pallets are used. The latter differ from the usual ones in that they have depressions in the form of overturned truncated pyramids or cones. When casting steel due to this, the inflow to the ingot is narrowed downwards. This is done in order to fill the resulting from the advance of the compression of the rod in the rolled product. Under the conditions considered, the smoothness of the ingot faces is not guaranteed due to damage by oxidized metal splashes and splashes frozen on the walls of the mold. A floor of splashes and splashes appears in the result of blows of a jet of liquid metal on the bottom of the cumpel. Being fused with the ingot body, oxidized splashes and splashes cause external flaws on the rolled product, which often leads to a rejection of the product. In an effort to improve the quality of the surface of the product, they refer to the siphon filling method of empty shells, in which the appearance of captivity is greatly reduced. A device is known in which notwoH for siphon casting of steel is performed as usual, with channels for laying of a phono brick, the cupel is placed in a tide on the surface of the pallet, the edge of the cumpel rising above the upper plane of the pallet is cut through a slot in a different recess through which the siphon the brick, which is a continuation of the part of the pallet that was dialed outside the cumpel. The slot is brick-lined on clay f1J. It is complicated to set the sump pan, although it provides a central supply of metal in the mold. The closest to the proposed invention is a tiller tray, made in the form of a slab with depressions under the bottom parts of the ingots and channels for supplying the metal into these depressions, with protective screens and stops for fixing the position of the mold. In this case, the protective screen is made in the form of a thin sheet of iron 2.

Such a design of the kumpelny pallet leads to the fact that in order to prevent its emergence, the thin sheet must be fixed on the falling surface of the kumpel. The fastening is carried out according to the following schemes: the sheet is shot with a special pistol to the cast iron cumpel with nails, which is laborious and not safe from the point of view of occupational safety — a special shooting causes a wound to the body of the pallet, which causes an acceleration of its failure The sheet can be strengthened by clamping the bent side of it between the pallet and the end part outlined, which is fraught with the metal going out from under the mold due to the inevitable one-sided upholding of its face from the pallet. In order to avoid skewing, it is possible to gouge out a slot in the pallet from above on the mortising and planing machines for laying the side of the sheet, which is not constructively justified. Even so, a thin sheet will float in the liquid metal, the lower free part of it will begin to bend upwards. The operations of laying a thin protective screen into the cupel greatly complicate the process of preparing various equipment for steel casting.

The purpose of the invention is to simplify the process of preparing and assembling the casting equipment for casting.

The goal is achieved by the fact that each protective shield is placed between the end of the mold and the capsule tray and is made with an образ-shaped hole, and the portion of the screen between the parallel sections of the hole is in the form of a visor, bent to the side of the recess.

FIG. 1 shows a front view of the device in FIG. 2 - protective screen, top view.

The device includes a mold 1, a pallet 2 with recesses 3 under the bottom parts of the ingots, channels 4 for supplying metal to these recesses, a protective screen 5 and stops b for fixing the position of the molds.

The protective screen 5 is made in the form of a pallet between the stops 6 for the mold of a sheet with an aperture and a screen 7 of the screen directed towards the recess.

The metal stream coming through channel 4 into the recess 3 (cumpel) of the pallet is indicated by the visor 7 and is directed through the opening between the edge of the visor and the surface of the recess. This continues until the visor is fused. The thickness of the sheet metal visor is selected so that the latter can melt at the time of filling the sap singing. Then the metal spreads in the space flooded with liquid, which eliminates or reduces the impact effect of the steel jet directed to the opposite face of the recess. The iron sheet along the end facing the cavity of the cavity (cumpel) may be partially welded to the body of the ingot. During the heating of the latter in the well welded

5 the crown is oxidized and to some extent burns. The remaining part is crushed during the rolling process and subjected to trimming on the knife of the blooming. This solution makes it easy

Q - lay a sheet with a hole and a visor on the pallet and install a mold on top of it. The proposed device ensures the density of the adjoining end of the mold to the casting, which eliminates the departure of the metal under the mold and reduces the number of operations to prepare the pallet. The present invention contributes to the simplification of the process of preparing filling equipment for casting.

0 steel.

Claims (2)

1. USSR author's certificate 255505, cl. In 22 D 7/06, 1967. five 2. USSR author's certificate No. 1409.59, cl. B 22 D 7/00, 1961.