Method for forecasting sharp drop of pressure of melter-gasifier and method for controlling the pressure in ironmaking process

Abstract

Provided are a method for forecasting a sharp drop of a pressure of a melter-gasifier and a method for controlling the pressure in an ironmaking process using non-coking coals and fine iron ores which can previously forecast the sharp drop of the pressure of the melter-gasifier to stably maintain an operation of the melter-gasifier. The method for forecasting the sharp drop of the pressure of the melter-gasifier in the ironmaking process includes forecasting the sharp drop of the internal pressure of the melter-gasifier when an internal pressure of a gas storage tank recovering and storing an excess gas generated in the melter-gasifier sharply drops. In the ironmaking process, a sharp drop of a pressure of a gas storage tank for recovering an excess gas discharged in the melter-gasifier is detected, and the sharp pressure drop of the melter-gasifier is forecasted to previously adjust a flow amount of gas (reduction gas) supplied to a reduction furnace, thereby stably maintaining the internal pressure of the melter-gasifier.

Description

technical field [0001] The present disclosure relates to a method for predicting a sharp drop in pressure of a melter-gasifier and a method for controlling pressure in an iron-making process, which predicts a sharp drop in pressure in a melter-gasifier to control pressure in a melter-gasifier , and more particularly, to a method for predicting a sharp drop in pressure in a melter-gasifier and a method for controlling pressure in an iron-making process using non-coking coal and fine iron ore by The sudden drop in pressure of the excess gas recovery tank is used to predict the sharp drop in the pressure of the melter-gasifier, and when the pressure in the recovery tank drops sharply, the supply amount of gas (reducing gas) supplied to the reduction furnace and the melter-gasifier is controlled , to continuously and stably maintain the pressure of the melter-gasifier. Background technique [0002] A blast furnace process generally known as an iron-making process requires raw m...

AI Technical Summary

Problems solved by technology

Sharp fluctuations in gas flow (i.e., sharp reductions in gas flow) can lead to collapse of ore fluidized beds in fluidized bed reduction furnaces and reduction furnaces

[0011] In addition, a drastic decrease in the amount of circulating gas capable of uniformly maintaining the internal pressure of the melter-gasifier or a drastic drop in pressure causes severe operational restrictions, for example, unstable operation of the melter-gasifier

[0012] Difficult to predict sharp pressure drop in melter-gasifier

For example, although the internal pressure of the melter-gasifier is expressed as figure 2 values ​​shown, but it is difficult to predict when the internal pressure of the melter-gasifier will drop sharply

Furthermore, no method has been proposed for predicting the pressure of the melter-gasifier

[0013] In addition, a method for predicting a sharp drop in pressure of a melter-gasifier and a method for stably controlling the internal pressure of a melter-gasifier have not yet been proposed

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