SU990822A1 - Method for filling intercone space of charging apparatus of blast furnace - Google Patents

Description

(54) METHOD FOR FILLING THE INTERCONOUS SPACE OF A DOWNLOAD LOADING DEVICE

The invention relates to the field of ferrous metallurgy, in particular to the domain production, and can be used when loading blast furnaces. . Interconusal gas cleaning systems are known, using the existing pressure equalization method in the charging device and consisting of a waste irrigated gas pipeline, equipped with equalizing valves and connected to the clean gas collector 1. The disadvantage of this drain valve is increased wear of equalization valves, cone conical surfaces and common loading devices and rapid overgrowing1 of the waste gas pipeline, up to the gas cleaning system. The closest to the technical essence and the achieved result to the proposed method is the filling of the inter cone space of the blast furnace, including one before lowering the lower cone into the inter cone space of pure gas under pressure exceeding the gas pressure in the furnace, the additional gas flow to the inter cone space during the lowering time feed to the furnace, and the gas is released from the cone space to the clean gas pipeline and the atmosphere {21. “The disadvantages of this method are the residual emissions of toxic gas into the atmosphere, since it is released into the gas pipeline. The gas flow, in which the pressure reaches 0.15 MPa, the rest of the gas, when its pressure decreases to atmospheric, before opening the upper cone, is released into the atmosphere. This quantity, depending on the pressure under the furnace top, reaches the total amount of gas in the charging device. In addition, in a known manner, a mode of operation is not provided in which the filling of the inter-conical space with a semi-pure gas and pressure equalization takes place after each lowering of the upper cone. The aim of the invention is to prevent emissions of dust into the atmosphere into the atmosphere.

gas and increase the durability of the loading device and equalizing valves.

The goal is achieved by the fact that, according to the method of filling the cone space of the charging device of the blast furnace, which includes the flow of the pure gas under pressure exceeding the gas pressure in the furnace, | additional gas supply to the inter-cone space during the time of lowering the supply to the furnace, gas outflow from the inter-cone space to the pure gas pipeline and the afusphere, in the set of supplying charge material to the lower cone in the inter-cone space after each portion of the charge equalizes with a semi-pure gas, purging of top gas inert gas to the gas pipeline of the hazardous gas and discharge of pure inert gas into the atmosphere until the complete supply of charge materials to the cone.

The drawing schematically shows a device that implements the proposed method.

When lowering the upper cone 1, the charge is poured onto the lower | cone 2. After cone 1 is closed, open valve 3 and, through gas pipeline 4, half-pure gas is fed into the space of the cone 5 with a back-up device.

After i-cone space is filled with semi-pure gas I, valve 6 and clean inert gas (for example, nitrogen) are opened through gas production 7 nociynjaeT into the cone space. Simultaneously with the opening of the valve 6, the valve 8 on the jumper 9 opens and the displacement and purging of the cone space into the pipeline of dirty gas with pure inert gas is carried out up to the work of the upper cone, G

Before dialing the next batch of charge, the large cone of valve 6 and 8 closes and opens, the atmospheric valve 10 and the numerical nitrogen is discharged into the atmosphere. Then

the upper cone opens and the cycle repeats.

If the supply of the charge materials at the lower cone 2 is fully accumulated, then the cone 2 opens and the blast-furnace gas is forced out of the cone space directly beneath the top of the blast furnace 11.

The economic effect of using the invention on one blast furnace will be 120 thousand rubles per year.

Claims (2)

Invention Formula The method of filling the cone space of the blast furnace charging device, which includes supplying the pure gas to the Interconusal space of pure gas under pressure exceeding the gas pressure in the furnace, additional gas supply to the cone space during the time of lowering the supply to the furnace, and gas release from the cone space to the gas pipeline clean gas and the atmosphere, characterized by the fact that in order to prevent the emission into the atmosphere of dusty toxic gas during the intake period, the lower cone Increasing the service life of the charging device and equalizing valves, during the set supply of charge materials to the lower cone in the inter-cone space, after each portion of the charge, the pressure is crawled with clean gas, then the colopps gas is blown with inert gas: into the gas pipeline and the inert gas is discharged gaseous atmosphere up to a set of full supply of fused materials to the lower cone. Sources of information, tash taken into account when examining 1. USSR author's certificate N 285942 CL. From 21 to 7/22, 10.11.70. 2. USSR author's certificate № 406887 class. From 21 to 7/20, 13.01.69.