Purging method used for purging bonded slag at converter mouth

Abstract

The invention relates to a purging method used for purging bonded slag at a converter mouth. The purging method comprises the following steps: step 1) of determining a diameter dimension of the converter mouth and thickness of the bonded slag at the converter mouth, and judging whether to purge or not; purging if the diameter of the converter mouth is smaller than 2.5m, and the thickness of the bonded slag at the converter mouth is 20-30cm, and going to a step 2); step 2) of placing an oxygen lance above the converter mouth through an external lifting device, setting an automatic purging modeon the oxygen lance, moving the oxygen lance automatically in an up-down reciprocating mode, and periodically purging the bonded slag at the converter mouth through oxygen-gas jet flow of the oxygen lance; and step 3) of checking the thicknesses of the bonded slag at the converter mouth and the diameter of the converter mouth by a worker after the purging is ended, and judging whether to purge again according to the diameter dimension of the converter mouth and the thickness of the bonded slag at the converter mouth; and repeating the steps 1) to 2) to purge again if the diameter of the converter mouth is smaller than 2.5m, and the thickness of the bonded slag at the converter mouth is 20-30 cm.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking, and in particular relates to a purging method for purging sticky slag at the mouth of a converter. Background technique [0002] Sputtering is an unavoidable problem in converter steelmaking, especially the sticky slag adhered to the mouth of the converter, which makes the diameter of the mouth of the converter shrink continuously, which seriously affects the smooth progress of operations such as adding molten iron and adding scrap to the converter; at the same time, the converter The diameter of the mouth is reduced, which affects the exhaust of the converter flue gas and further aggravates the occurrence of splashing. [0003] At present, major iron and steel plants use two methods to clean the sticky slag at the converter mouth. These two methods include: cleaning the sticky slag at the converter mouth with a furnace dismantling car and using an oxygen lance to purge the sticky s...

AI Technical Summary

Problems solved by technology

However, using a furnace dismantling car to clean the sticky slag at the furnace mouth is manual cleaning, which takes a long time and affects the production rhythm, and the temperature of the furnace mouth is high, so it cannot be operated for a long time; while using an oxygen lance, the sticky slag at the converter mouth is purged by blowing oxygen. Slag, easy to operate, the effect is obvious, but through manual control of the oxygen lance, due to the improper use of the oxygen lance gun position, it is easy to burn the flue and leak, and there is a serious safety hazard

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