SU810827A1 - Packing device of blast furnace air heater - Google Patents

Description

one

This invention relates to ferrous metallurgy, specifically to the equipment of blast furnace stoves.

Sub-nozzles of air heaters of blast furnaces are known, which contain metal columns and metal grids arranged on them with openings under the nozzle channels 1.

The grids are installed with expansion joints between them. The disadvantage of such sub-attachment devices is that when they are installed in air heaters, the adjacent grates are mixed one relative to the other vertically, which greatly complicates laying the nozzle on the grate and also leads to the destruction of the nozzle bricks placed above the expansion joints between the grates.

This disadvantage is eliminated in a sub-headset consisting of columns and a two-row grid 2. In this device, the metal grid consists of two rows. The lower row is located on the columns; the upper row, usually made of smaller parts, is laid on the lower row of the grid. The disadvantages of this device are a large consumption of heat-resistant material, as well as the presence of a large number of parts differing from each other.

the upper row of the lattice, located along the contour of the sub-attachment device, which significantly increases the labor intensity of its manufacture.

The purpose of the invention is to reduce the consumption of heat-resistant metal and the complexity of its manufacture.

This task is solved by creating a device in which between metal grids of the upper row installed above the junctions of the lower row grids, as well as along the contour of the sub-attachment device, grates of heat-resistant ceramics, such as chamotte blocks, are laid.

FIG. 1 shows the proposed device, vertical section; in fig. 2 - the same, top view.

The device contains columns 1 of heat-resistant material, located on them of the lower row grilles 2, on which grilles 3 and 4 of the upper row are laid. Lattices 3 and 4 are made smaller than the lattice 2 and are made of different materials. At the junctions of the lower-level gratings 2, gratings 3, made of heat-resistant metal, are laid, and between them, gratings 4, made of heat-resistant ceramics, such as chamotte blocks, are laid.

The device works as follows.

During the heating period of the nozzle (not shown) of the combustion products, the exhaust gases from the nozzle pass from top to bottom through the cells of gratings 2-4 into the sub-inlet space and are discharged through the flue pipes of the air heater (not shown). During the blast period, the cold blast enters the sub-inflatable space and passes through all the cells of the grids 2-4 from bottom to top into the nozzle.

The proposed device will reduce the consumption of refractory cast iron, for example, with regard to a 5000 m blast furnace stove, the consumption of refractory cast iron will be reduced by 150 tons, which will reduce the cost of manufacturing and installation of sub-attachments by 50 thousand rubles, reduce the labor intensity of manufacturing the sub-attachment device , by eliminating the manufacture of more than 100 casting molds for casting cast iron tiles, located in the well-known

device along the contour of the sub-heading device.

Claims (2)

1. Reference book “Domain production, vol. 2, Metallurgizdat, 1963, p. 181. 2. Japanese Patent No. 47-31577, cl. 10A522, 1976 (prototype).