SU1611940A1 - Method of charging blast furnace by cone-less charging arrangement - Google Patents

Abstract

The invention relates to blast furnace production and can be applied to infinite blast furnace charging devices. The purpose of the invention is to reduce dust and gas emissions into the atmosphere and reduce gas consumption for pressure equalization. The gas is discharged from the intermediate hopper 2 initially to the hopper 3 through the additional pipe 16 with the open bypass valves 17 and 18 until the pressure in the hoppers 2 and 3 is equalized. Then the valves 17 and 18 are closed, after which the final discharge of the gas and the hopper 2 is performed exhaust valve 7. The amount of gas and dust emitted into the atmosphere and the gas consumption for filling bunkers are reduced. 1 il.

Description

the gr of the open bypass valves 17 and 18/10 pressure equalization in bins 2 and 3. Then the valves 17 and 18 are closed, after which the final gas is released

from the hopper 2 by opening the exhaust valve 7. The amount of gas and dust emissions into the atmosphere and the gas consumption for filling the hoppers are reduced. 1 silt

I The invention relates to the field of metallurgy, in particular to methods and equipment for charging blast furnaces.

j The aim of the invention is to reduce dust and gas emissions into the atmosphere and reduce gas consumption for pressure equalization.

The drawing shows a device for pressure equalization in intermediate silos of a conical charging device.

The device contains a receiving funnel 1, installed above the intermediate charge bins 2 and 3 (left and right), in the upper part of which, respectively, the upper (left) closing valve 4 and the upper (right) closing valve 5 are installed.

 The intermediate charge hopper is equipped with a filling valve 6, an exhaust valve 7, a charging valve B and a lower gas sealing valve 9.

i The intermediate charge hopper 3 s | is filled with a filling valve 10, an exhaust valve 11, a bleeder valve 12 and a bottom gas seal valve 13, respectively.

I Lower sealing valves 9 and | 13 intermediate bins 2 and 3 are installed in the funnel 14 of the central chute 15, located above the charge distributor (|| e shown).

Intermediate charge bunkers 2 and 31 in the upper part are connected by an additional pipe 16, on which the bypass valve 17 of charge bunker 2 and the bypass valve 18 of charge BJoro bunker 3 are installed.

The pressure equalization method in the intermediate silos of the infinite loading device is carried out with the following way.

The charge is loaded into the intermediate bunker | er 2 through the receiving water fjOHKy 1 with the upper (left) fen-off valve 4 open and closed with the charge valve 8 and the lower gas-closing valve.

After loading the charge into the intermediate charge bin 2, the upper geo-closing valve 4 is closed. After that, the filling valve 6 is opened, through which gas is supplied to the bunker 2 until the pressure of the gas is equalized with the internal furnace of the blast furnace. After the gas pressure has been equalized, the lower gas shut-off valve 9, the charge valve 8 and the charge in the intermediate tank 2 are opened through the funnel 14, the central chute 15 and the charge distributor is fed into the blast furnace.

After the charge is completely unloaded from the intermediate charge bin 2 into the furnace, the bottom gas shut-off valve 9 and charge gate 8 are closed. After loading the charge into the intermediate

the hopper 2 is loaded into the intermediate hopper 3 through a hopper

1 with an open top gas sealing valve 5 and, respectively, closed bottom valve 13 and charge gate 12.

After charging the charge, the upper gas shut-off valve 5 closes.

The discharge of gas from the intermediate bunker 2, which is after the sluicing of the charge into the furnace, is carried out in two stages, while

in the first stage, a part of the gases is transferred from the intermediate bunker 2 to the intermediate bunker 3, which is at that moment with the loaded charge through an additional pipeline 16 with open bypass

and shut-off valves 17 charge hopper

2 and the bypass and shut-off valve 18 of the charge bin 3 until the gas pressure is equalized in the hoppers 2 and 3. After the pressure is equalized, the bypass valves 17 and 18 block the transfer of gases from the hoppers 2 and 3 and the second stage of the final discharge of gases from the intermediate hopper 2 by opening the exhaust valve 7 from the intermediate hopper 2, which is after the sluicing of the charge in the furnace.

Then, after the final discharge of gases from the intermediate bin 2, when the gas pressure is brought to atmospheric,

it is purged with an inert gas when the inert gas is supplied through the filling valve 6 with the exhaust valve 7 open. Next, the valves 6 and 7 are closed, the upper gas-filling valve 4 is opened, and the charge loading cycle and the blast furnace are repeated. pipeline 16

opening the valves 17 and 18, transferring some of the gases before equalizing the pressure in the intermediate bin 2 and intermediate bunker 3 and alternate repeated loading cycles of the charge from intermediate silos 2 and 3 are performed. Using the invention reduces the gas flow to equalize the pressure in the intermediate silos by 50 %, respectively, will reduce the amount of dust emissions and gas through the exhaust valve.

Claims (1)

The invention The method of loading a blast furnace with a unbootable charging device, 15 C five supplying the charge through the receiving hopper to the intermediate hopper, equalizing the pressure in the loaded charge hopper, locking the charge from the intermediate hopper through the distribution element into the furnace, discharging gas from the empty intermediate hopper and loading the charge into the hopper, characterized in that, in order to reduce dust gas emissions B atmosphere and reducing gas flow and pressure equalization, before discharge of gas from the emptied intermediate bunker, part of the gas is bypassed into the intermediate bunker loaded charge, before pressure leveling in them.