Converter second-stage venturi throat regulation method

Abstract

The invention relates to a converter second-stage venturi throat regulation method. According to the converter second-stage venturi throat regulation method, when iron and waste steel are added, the RD valve opening degree is controlled at 40-50%; before the oxygen blowing amount achieves 20%, the RD valve opening degree is controlled at 50-60% at a silicon-manganese oxidation stage; when the oxygen blowing amount achieves 20-75%, the RD valve opening degree is controlled at more than 90% at a carbon-oxygen intense oxidation stage; 4) after the oxygen blowing amount achieves 75%, the RD valveopening degree is controlled at 65-75%; after a sublance test process is started, the RD valve opening degree is controlled at 50-60%; and after the oxygen blowing is ended, the RD valve opening degree is controlled at 40-50%. According to the present invention, the opening degree of the second-stage venturi throat is automatically regulated according to the carbon-oxygen reaction and the flue gaschange law during the converter smelting, and under the premise of no additional arrangement of other equipment, by reducing the air introduction at the early stage and the late stage of the smeltingand the flue gas overflow burning at the middle stage, the effects of dust removing improving, coal gas recovery time prolonging and coal gas recovery improving can be achieved.

Description

technical field [0001] The invention relates to the technical field of converter gas recovery, in particular to a method for adjusting the Erwen throat of a converter using a one-tower Shuangwen wet dust removal system. Background technique [0002] The main purpose of converter smelting is to remove Si, Mn, C, P and other impurity elements and harmful gases in molten iron, and adjust the composition and temperature of molten steel. The oxygen blowing process of the converter is mainly divided into three stages: one is the early stage of oxygen blowing, also known as the silicomanganese oxidation period, the main reaction is that the silicon manganese in molten iron reacts with the blown oxygen to form SiO 2 , MnO and other oxidation products enter the slag, and only a small amount of carbon is oxidized. During this period, the amount of flue gas generated is small, and the main component of flue gas is N 2 . The second is the middle period of oxygen blowing, also known as...

AI Technical Summary

Problems solved by technology

However, the daily maintenance workload of the micro-differential pressure detection system is heavy, especially the slag accumulation must be cleaned and purged frequently for the pressure-taking pipeline, otherwise the accuracy of the micro-differential pressure detection value cannot be guaranteed; so how to ensure the micro-differential pressure detection system Reliability and stability become the premise and bottleneck of this technology