SU981366A1 - Method for charging blast furnace - Google Patents

Description

{5+) METHOD FOR LOADING A DOMAIN FURNACE

one

This invention relates to ferrous metallurgy, in particular to methods for charging blast furnaces.

There is a method of loading blast furnaces, including the supply of the charge from the bun. kerov in a rotating distribution funnel and laying it in the furnace 1.

However, in the case of pauses in the supply of the charge from the bunkers, the helix of the crumbling charge breaks, which Q leads to unevenness of the surrounding distribution of the charge.

The closest to the proposed technical essence and the achieved result is the method of loading the blast furnace, which includes the supply of charge materials from the bins to the rotating funnel and their unloading through the swinging tray. This method also leads to about-20 uneven distribution of the charge materials in the blast furnace, since during the pauses of the supply of the charge from the bins, the screw

bulk charge lines. The end of the turns of each previous dose is not the beginning of the next one. Loaded and unloaded areas may be the same for different doses. In addition, the volumetric flow rate of the charge per unit time is uneven during the discharge time. In the process of unloading the charge from the filled funnel, the volumetric rate of its descent is much higher than when the rest of the charge is shed. There is a decrease in the amount of pouring of the charge, which leads to a drop in the curve of the graph of the volume of loading of the charge per unit time, as there is a depletion of the jets of the charge.

The aim of the invention is to improve the district distribution of the charge.

Claims (2)

This goal is achieved in that according to the method of loading a blast furnace, which includes supplying charge materials from the furnace bins to a rotating funnel and unloading them onto a tray in the pp of the charge supply to the rotating funnel, the latter rotates in the direction opposite to the direction of its rotation in B (by unloading the charge into eight, in order to improve the district distribution of the charge materials in the furnace, for example, at a uniform speed of rotation of the funnel with a speed (r / min, the crows rotate during the pauses). ki on 30 in the direction opposite to the direction of its rotation during the period of unloading materials into the furnace. This angle of rotation is optimal for the speed of rotation of the funnel rpm, since the funnel during the period of expiry of the last 30 materials turns 30 turns. The charge materials during this time are drained and a wedge tail is formed with the start in the volume of the normal flow and with the degenerate tail up to the charge O. At a funnel speed of up to 10 rpm, the wedge tail of the charge materials spreads by 90 ravens ki Therefore, during the period of pauses 75, the funnel is rotated in the direction opposite to the direction of rotation. 4 it during the period of unloading materials into the furnace. The implementation of the proposed method allows to improve the district distribution of the charge and reduce the coke consumption by 1-3. Claims The method of charging a blast furnace, including feeding charge materials from the furnace hoppers into a rotating funnel and unloading them into the furnace through a swinging tray, characterized in that, in order to improve the district distribution of the charge at the furnace top, its rotation by 30-90 in the direction opposite to the direction of its rotation during the discharge of the charge into the furnace. Sources of information taken into account in the examination 1. USSR author's certificate 699018, cl. From 21 to 7/20, 1978. 2. USSR author's certificate No. 709,686, cl. From 21 to 7/18, 1978.