Method and system for monitoring fuel ratio of blast furnace in real time

Abstract

The invention discloses a method and a system for monitoring the fuel ratio of a blast furnace in real time, which is characterized in that: the method comprises the following steps: (1) calculating a monitoring value of Si content in molten iron of the current heat and inputting the monitoring value to a computer; (2) calculating a control value RLB of the fuel ratio by a fuel ratio calculation module; (3) obtaining a detection value Ls of a baiting speed; (4) inputting the control value RLB of the fuel ratio, a detection value K of coke ratio and the detection value Ls of the baiting speed to a calculation module of a coal injection speed for calculation, and outputting a control value M of the coal injection speed; and (5) inputting the control value of the coal injection speed to an industrial control computer; and issuing a command of coal injection amount to coal injection control equipment of the blast furnace according to the control value of the coal injection speed. The method and the system simulate the operating thinking of a blast furnace operator through the computer, standardize the operating action of the operator, reduce the operating randomness varying from person to person and reduce the failure rate of the operator to the maximum extent.

Description

Technical field [0001] The invention relates to a blast furnace operation control technology, in particular to a method and system for real-time monitoring of the fuel ratio of a blast furnace. Background technique [0002] A blast furnace is a high-pressure closed reaction vessel that can reduce iron from iron ore. The reducing agent and heat source required to maintain its reduction reaction mainly come from coke and coal powder. The amount of coke consumed in smelting one ton of pig iron is the coke ratio, and the amount of pulverized coal consumed in smelting one ton of pig iron is the coal ratio. The coal ratio and the coke ratio are added to the blast furnace fuel ratio in kg / t. The blast furnace fuel ratio is an important economic and technical index to measure the energy utilization level of the blast furnace. [0003] Furnace temperature ([Si] content in molten iron, unit%, weight ratio) control is an important control content for blast furnace operators. The blast furna...

AI Technical Summary

Problems solved by technology

However, the level of control depends on the operator's operating skills and requires years of accumulation of operating experience. Therefore, it is very difficult to require everyone to do this, especially for those who are new to the actual operation of the blast furnace. technical personnel, need a very long process of learning and accumulation

[0004] There are three main difficulties for operators in controlling fuel ratio: first, the calculation of material rate and fuel ratio is not accurate and timely; second, it is difficult to grasp the best timing and degree of coal injection adjustment; third, different teams operate Poor operational coordination among personnel

The usual solution is to strengthen the training and performance appraisal of the operator's operating skills to improve their operating skills and sense of responsibility, but it is often difficult to solve the problem due to individual differences

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