Method and device for adjusting micro differential pressure at converter mouth

Abstract

The invention relates to the technical field of metallurgy, and in particular relates to a method and a device for adjusting the micro differential pressure at a converter mouth. The method comprises the following steps: calculating the pressure difference delta P of the converter mouth and a pressure testing point according to a formula in the specification, calculating a practical pressure value C of the converter mouth according to a formula C=B+delta P, and controlling the converter mouth to be in a micro positive pressure state according to the practical pressure value C of the converter mouth. The device comprises a pressure testing device, a first temperature sensor, a second temperature sensor, a flowmeter, a converter mouth micro pressure difference system and a controller, wherein the pressure testing device, the first temperature sensor, the second temperature sensor, the flowmeter and the converter mouth micro pressure difference system are respectively connected with the controller. By adopting the method and the device for adjusting the micro differential pressure at the converter mouth, the consequence that a great deal of air is sucked as great negative pressure can be generated when the fume flow at the converter mouth is small, can be avoided, and meanwhile the recycling time of the fume can be effectively prolonged, so that waste of resource is avoided.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method and device for adjusting the micro-pressure difference at the mouth of a converter. Background technique [0002] Since a large amount of high-temperature slag will be splashed during the smelting process of the converter, if the pressure-taking tube for measuring the pressure at the furnace mouth is installed directly at the furnace mouth of the converter, the opening of the pressure-taking tube is easily blocked by the high-temperature slag, and the failure rate of the equipment is high. Therefore, generally the pressure measuring tubes of the furnace mouth of the converter are installed in the flue at a certain distance above the furnace mouth. The micro-differential pressure system at the furnace mouth of the converter measures the pressure of the furnace mouth in real time through the pressure measuring point set in the flue, and maintains a slight positive press...

AI Technical Summary

Problems solved by technology

Adjusting the furnace mouth differential pressure system based on the maximum difference generated when the flow rate is the largest can effectively prevent the occurrence of fire at the furnace mouth. lots of air

In the early stage of blowing, the increase rate of CO concentration is slowed down, so that the time point of gas composition reaching the standard is later; in the later stage of blowing, the rate of decline of CO concentration is accelerated, so that the recovery end time point is earlier, which directly causes the recovery time to be shortened

Under normal circumstances, this adjustment method will reduce the recovery time by about 0.5-1 minute, wasting a lot of resources

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