SU865524A1 - Refractory gas-permeable brickwork - Google Patents

Description

(54) FIREPROOF GAS-PERMEABLE CLASS ADB.

one

The invention relates to metallurgy, and more specifically to methods for purging melts with gases.

Known refractory gas-permeable masonry of the bottom of the tank, such as a bucket for blowing metal with gas, containing bricks and seams between them, filled with a porous refractory mass 1.

The lack of buckets with such laying of the bottom is that in cases of high melt temperature or long blowing duration (in particular, in converters), long longitudinal, through gas-permeable vertical grooves between rows of bricks wear out faster than short transverse non-through welds between bricks in every r d d. Maximum wear is achieved at the joints of the specified longitudinal and transverse seams. This reduces the operational durability of the masonry.

Closest to the technical nature of the proposed is a refractory gas-permeable masonry bottom of the tank, made of bricks with seams, filled with a gas-permeable refractory mass 2.

The lack of a known construction is that it has low durability, only a few heats, due to the fact that the long, longitudinal, gas-permeable seams between rows of bricks are quickly eroded by large-scale pulsations of the velocity of the metal coinciding in direction with the grooves.

The purpose of the invention is to increase the operational durability of the masonry.

This goal is achieved by the fact that long longitudinal through seams between rows

to the bricks, they are filled with a gas-tight refractory mass, and the short, non-communicating cross-seams between the bricks in each row are filled with a gas-permeable refractory mass.

The drawing shows a diagram of refractory

15 gas permeable masonry, top view.

The brickwork is made of bricks with 1 consecutive rows of 2, i.e. so that the short transverse joints 3 between the bricks 1 in each row 2 were not communicated, did not coincide with similar transverse joints 3 in the adjacent rows 2. The longitudinal long, through joints 4 between rows 2 are filled with a gas-permeable refractory mass. The transverse, short, non-communicating gaps 3 are filled with a gas-permeable resistant mass.

For example, the upper working layer of the Kla, | .-: and the bottom of a 130-ton oxygen conduit is laid on the gas distribution box and made 460 mm thick from periclase-spinel bricks 1 with dimensions 460X 230 X 75 mm, which are installed with “on the end. The transverse short grooves 3 between bricks 1 in each row 2 have a thickness of 2 mm and are densely filled with a porous refractory mass of the following composition, wt.%:

Fused periclase fraction 0.5-1mm70

Fused periclase fraction 0.0 88 mm15

Clay refractory15

on the hammer Liquid glass

1.15-1.20

15 fully

(over 100%) The longitudinal (through) grooves 4 between rows 2 have a thickness of 1 mm and are densely filled with a gas-tight mass of the following composition, wt.%: Fused periclase fraction 0 --- 0.5 mm 70

Clay refractory hammer 30 This mass before filling the seams 4 is sealed with water to the consistency of the sweep. After the laying, the masses 4, filled with this mass, are completely impermeable to gas.

In the smelting of transformer steel in such a converter before the release of smelting

-u-wh Th

/

Within a few minutes, argon is blown into the bath through the bottom masonry. As a result, the oxidation of the steel is substantially reduced, i.e. its quality is improved.

Due to the fact that in the proposed masonry there are no gas permeable long longitudinal, through grooves between the rows and the joints of these grooves with transverse grooves, the operational durability of the gas permeable masonry of the bottom increases significantly.

The design features of the proposed masonry increase its performance, i.e. give new technical and economic effect.

Claims (2)

1. Author's certificate i С f № 38650, cl. B 22 D 41/02, 197i 2. Author's certificate of the SS (, R No. 452428, class B 22 D 41/02, 1973.