Method for preventing electrostatic dust collection explosion venting in converter double-slag smelting process

Abstract

The invention discloses a method for preventing electrostatic dust collection explosion venting in the converter double-slag smelting process. The method includes the steps that when lance carrying deslagging is carried out for the first time in the converter smelting process, an oxygen lance is carried to a fire hole for nitrogen flushing, and as for the volume contents of gases in a dust remover, nitrogen flushing is stopped after O2 is smaller than or equal to 6% and CO is smaller than or equal to 9%. According to the method, by optimizing the primary slagging gas supply system, the converter oxygen lance is used for nitrogen flushing, the volume content of O2 entering the electrostatic field dust remover after converting is stopped is controlled to be 6% or below, the explosion conditions of a gas mixture of CO and O2 are effectively evaded, and therefore explosion venting of the electrostatic field dust remover in converter double-slag operation can be avoided, and the effects ofstabilizing the converter production rhythm, reducing the damage to dust removing equipment and prolonging the service life are achieved. Meanwhile, the double-slag operation is adopted in a converter, P controllability of the converter is improved and the volume production needs of high-end branded steel are met.

Description

technical field [0001] The invention relates to a converter smelting process, in particular to a method for preventing explosion and venting by electrostatic dust removal during the double slag smelting process of the converter. Background technique [0002] Electrostatic field dust collector is an important dust removal method used in steelmaking converters. Compared with the traditional OG wet converter dust removal process, its advantages are water saving, power saving, less land occupation, better dust removal effect, and can The recovery of dry dust is widely used in steelmaking converters at home and abroad. During the use of the electrostatic field dust collector, explosions often occur in the electric field, causing the explosion relief valve to pop open. Explosion venting refers to a technology that guides the high-pressure combusted and unburned mixed gas in the container or inside the pipeline to the outer space through the explosion venting device, so that the i...

AI Technical Summary

Problems solved by technology

During the use of the electrostatic field dust collector, explosions often occur in the electric field, causing the explosion relief valve to pop open

Explosion venting refers to a technology that guides the high-pressure combusted and unburned mixed gas in the container or inside the pipeline to the outer space through the explosion venting device, so that the internal deflagration and explosion pressure are rapidly reduced, but this is a remedial measure. Frequent explosions in the furnace have brought serious harm to the converter production and caused damage to the equipment of the electrostatic precipitator system

Due to the great harm caused by the explosion accident of the electrostatic field dust collector, there are many strict operating restrictions on the traditional converter steelmaking process, the most stringent process restriction is to prevent the gun from starting and stopping the blowing process in the middle of the blowing process.