SU75212A1 - Bottom for Bessemer's converter - Google Patents

Description

It is proposed for sour or basic converters to use lenticular bottoms, characterized in that, in order to increase their durability in the axial portion, the bottom surface facing the inside of the converter is made convex.

Lenticular bottom can be made in 3 of three options (Fig. 1, 2 and 3).

In the first embodiment (Fig. 1) the bottom has the form of a convex-concave lens. The advantage of this form lies in the possibility of using molds of the same length for the whole section of the bottom and to reduce the size of the air box, giving it the shape of a lentil. The latter makes it possible to make special viewing windows at the peripheral tuyeres.

In the second embodiment (Fig. 2), the bottom has a flat convex shape. In this case, it is necessary to have tuyeres of various lengths, increasing from the periphery to the center of the bottom. In the second version, the air box has the usual shape.

In the third embodiment (Fig. 3), the bottom has the shape of a two-convex lens. Due to the significant difference in the length of the tuyeres, the latter have different sections. The tuyeres located in the central part of the bottom are subject to considerable stresses, as a result of which the cross section of their nozzles is increased by 20-30%.

The bottom convexity arrow is selected depending on its diameter; with a bottom diameter of 1500 mm, the arrow is 85-125 mm, with 0 1750 mm - from 100 to 150 mm, with 0 2000 lsh - from 125 to 175 mm, with 0 2250 mm - from 150 to 200 m. m, with 0 2500 mm and higher - from 200 to 275 mm.

In the manufacture of the bottom according to the third variant, the highest resistance is achieved.

Subject invention

The bottom is for a Bessemer converter, so that in order to increase the durability of the axial part, the surface facing the inside of the converter is made convex.

Convex-concave bottom

Convex-pr my bottom