A method for avoiding explosion venting of electrostatic precipitator during converter iron mixing process

Abstract

A method for avoiding explosion venting of an electrostatic dust collector in iron mixing process in a converter belongs to the technical filed of converter steelmaking methods, is used to prevent explosion venting of the electrostatic dust collector in the iron mixing process in the converter. The technical scheme is as follows: by reducing the thermal state furnace slag of FeO enrichment and control of the semisteel mixing speed, CO generated during the semisteel mixing process can be reduced; and by manual adjustment of the opening of a secondary dedusting valve and the rotating speed of a dust removal fan, the CO generated during the semisteel mixing process minimally enters the electrostatic dust collector so as to avoid reaching CO and O2 mixed gas venting explosion condition. By optimizing slag remaining and iron mixing operation, CO content in the electrostatic precipitator is controlled below 9%, CO and O2 mixed gas explosion condition can be effectively avoided, the slag remaining operation and the explosion venting of the electrostatic dust collector in the semisteel mixing process in the converter under the conditions using converter returning slag as a cold material can be avoided, and the role of stabilizing converter production rhythm, reducing the damage of dust removal equipment, and prolonging service life can be played.

Description

technical field [0001] The invention relates to a method for avoiding explosion venting of an electrostatic precipitator in the process of adding iron to a converter based on the operation of leaving slag in semi-steelmaking and using the slag returned from a converter as a cold material, and belongs to the technical field of converter steelmaking methods. Background technique [0002] The molten iron produced by blast furnace smelting vanadium-titanium magnetite contains vanadium, titanium, chromium and other elements. In order to extract vanadium in molten iron, a dual process is generally adopted, that is, the molten iron first extracts vanadium, and then uses semi-steel to make steel. There are traces of elements such as silicon and manganese in semi-steel after vanadium extraction, and the content of oxides such as silicon dioxide and manganese oxide in the slag during the steelmaking process is very small, resulting in a single component of the slag and high viscosity, ...

AI Technical Summary

Problems solved by technology

At the same time, the returned slag is added into the furnace together with the scrap steel, because the returned slag contains a large amount of low-melting point compounds and higher ferrous oxide, which intensifies the carbon-oxygen reaction in the iron mixing process, increases the amount of CO generated, and increases the CO and o 2 Probability of Mixed Venting

[0005] The explosion venting of the electrostatic precipitator in the process of adding iron to the converter is a serious safety hazard in the operation of leaving slag and iron, which has not been completely solved so far. to be resolved