SU95486A1 - Device top of the blast furnace and other shaft furnaces - Google Patents

Description

The subject of the invention is the device of the upper part of blast furnaces and other shaft furnaces equipped with a charging apparatus consisting of a bowl, a cone and a charge distributor.

The described device is more advanced as compared with the known devices of this kind, since it provides an improvement in the use of the reducing ability of gases, a reduction in coke consumption and an increase in furnace productivity. This is achieved through the use of separate exhaust gases from the peripheral and axial zones of the furnace's throat, which allows you to regulate the distribution of gases in the mine, increasing or weakening the peripheral flow of gases at the expense of the axial. For this purpose, separate peripheral and axial gas vents are arranged in the furnace, in which the throttle valves are installed after the devices for preliminary or gas cooling and cooling of the gases.

FIG. 1 of the drawing shows a longitudinal section of the upper part of the furnace of the device; in fig. 2 and 3, the arrangement of the flue channels of the furnace.

A guide funnel 1 is mounted on the furnace top, carrying a central tube 3 on the radial ribs 2.

Above the funnel 1, a cylindrical body 4 is installed, in which a charging apparatus of conventional construction is mounted, consisting of a bowl 5, a cone 6 and a rotating grinder of the distributor.

When the cone 6 is lowered, the charge materials are poured into the annular space between the funnel 1 and the central tube 3, and when the charge materials are subsequently moved into the furnace, they are located in the peripheral zone of the throat between the lower edge of the funnel 1 and in the central zone under the pipe flare 3

During operation of the furnace, the gases coming out of the charge materials located in the peripheral zone of the furnace top are discharged from the furnace through the gas outlet 8, and the gases leaving the materials located in the central zone are discharged through the gas outlet 9. At the gas outlet 8 and 9 The throttle valves 10 and I (Fig. 3) allow to regulate over a wide range the relative amount of gases discharged from the furnace by separate gas outlets and act accordingly on the distribution of gases in the furnace shaft.

The redistribution of gases in the materials environment, depending on the degree of opening of the throttle valves 10 and 11, will be greatest at the top 3 and less significant at deeper levels.

The throttle valves 10 and .11 (Fig. 2 and 3) are installed after the devices 12 for the preliminary cleaning of gases and the devices 13 for cooling the gas. However, valves can be installed up to these devices.

The proposed device can also be used in furnaces operating at an increased pressure of gases at the top of the furnace. In this case, the pressure reducing valve 14, which serves to increase the pressure, is installed after the throttle valves 10 and 11.

PREDAMET and 3 ABB rie and

The device of the upper part of the blast furnace and other shaft furnaces equipped with a charging apparatus consisting of a bowl, a cone and a charge distributor, characterized in that for controlling the distribution of gases in the shaft with the possibility of strengthening or weakening the peripheral gas flow due to axial flow, it is made with separate gas outlets. the peripheral and axial zones of the furnace throat and channels installed on the channels before or on the device for pre-cleaning and cooling of gas with throttle valves.

Qbi / g, 2