SU396166A1 - GLASS FOR CONTINUOUS STEEL RATING - Google Patents

Description

one

The invention relates to the continuous casting of metals and alloys.

A known elongated cup for supplying a metal to a mold, having in its lower part inclined holes directed at an angle of 15-30 ° to the vertical.

However, such an arrangement of inclined holes for supplying neutral gas to the crystallizer does not ensure effective mixing of the metal throughout the entire section of the ingot and uniform distribution of impurities.

The purpose of the invention is a uniform distribution of impurities over the cross section of the workpiece due to the supply of neutral gas to the steel stream.

This is achieved by making holes in the walls of the upper part of the glass at an angle of 40-60 ° to the vertical, and their projections in the horizontal plane are parallel to the axis of the glass cross-section to a distance of 0.5-0.9 from the radius of its channel.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 - glass, cross section.

The device for continuous casting of steel consists of a lined funnel /, located under the outlet of a steel-teeming ladle, an elongated cup 2

with holes 3 in the walls of the metal casing 4, which forms a gas collector 5 near the holes in the walls of the glass. In the wall of the gas collector 5, a handle 6 is inserted into the floor, which also acts as a gas inlet. The gap between metallic leather} 4 with a funnel / cup 2 is filled with a refractory seal 7 on a bond of refractory glass or liquid glass. Metal paws 5 are welded to the casing 4, with which the entire device is attached to the bottom of the pouring ladle.

Open the 3 holes at an angle of 40-60 ° to the vertical and tangentially in relation to the channel of the glass. The holes are made in several rows according to the height of the glass. Each row includes three, six, eight, etc., holes. Stenkp top of the glass can be made of porous refractories.

The device works as follows. In the process of pouring steel and passing it through the channel of the glass 2, using a hollow handle 6 and a gas collector 5, neutral gas, in particular argon, is supplied to the holes 3 under the required pressure. The opening of the holes at an angle of 40-60 ° to the vertical prevents the bubbles of the injected gas from floating up in the glass channel with fluctuations in the metal consumption in considerable limits. The supply of gas jets in such a way that their projections in the horizontal plane are parallel to the axes of the cross section of the glass and the distance from them is 0.5-0.9 (most rationally 0.7-0.9) of the radius of its channel, allows you to twist the old metal in the channel.

Removing overheating of steel, mixing it in the jet in the proposed device with the help of neutral gas allows to obtain an ingot with a smaller depth of the liquid well and improve its quality due to a more uniform distribution of harmful impurities in height and cross section.

Subject of Invention

A glass for continuous casting of steel into the mold, consisting of an elongated refractory cylinder with a central casting hole and sloping downward slots in the side walls, characterized in that, in order to evenly distribute impurities over the cross section of the workpiece due to the supply of neutral gas, in the walls of the upper part of the glass holes are made at an angle of 40-60 ° to the vertical, and their projections in the horizontal plane are parallel to the axis of the glass cross-section at a distance of 0.5-0.9 from them sa his channel.

FIG. one

Fig. /: