Automatic control method for point blow operation of oxygen lance of oxygen top-blown convertor

Abstract

The invention provides an automatic control method for a point blow operation of an oxygen lance of an oxygen top-blown convertor. The method comprises the steps of additionally arranging a point blow control picture and a point blow calculate module in a first-level computer and a second-level computer respectively; and additionally arranging a point blow data communication module and a point blow execution module in a PLC of a convertor, wherein the second-level computer calculates a point blow solution according to steel target data and measurement result data of the convertor, and sends the point blow solution to the PLC of the convertor; and the PLC of the convertor performs automatic control on a lifting device and an oxygen valve of the oxygen lance according to the point blow solution, and sends the control results to the second-level computer and a third-level computer, thereby realizing the automatic control for the point blow operation of the oxygen lance. The method employs the computer calculates the point blow solution, so that the calculated and adopted point blow solution can be more scientific and reasonable; accuracy of the control of the point blow operation of the oxygen lance is increased significantly; the point blow process and recordance of the result data are more accurate; influences caused by various human factors can be prevented; and labor intensity of an operator can be relieved.

Description

technical field [0001] The invention belongs to the field of steelmaking technology, and in particular relates to an automatic control method for oxygen lance point blowing operation of an oxygen top-blown converter. Background technique [0002] Oxygen top-blown converter has become a major steelmaking equipment because of its high production efficiency and low cost. The automatic steelmaking operation of the converter generally refers to the automatic smelting control process from the start of oxygen blowing and ignition to the end point before the gun is lifted. , secondary computer (process control computer), tertiary computer (production management computer), converter computer programmable controller (referred to as converter PLC). The point blowing operation refers to the supplementary blowing operation of the oxygen lance taken when a carbon pull fails to hit the steel target. At present, the proportion of domestic converter oxygen lance point blowing operation acc...

AI Technical Summary

Problems solved by technology

[0003] This manual operation has drawbacks: First, the operator compares the steel grade target with the smelting end-point treatment results, and estimates the point blowing plan based on experience. Due to the different personal experience of the operator, the point blowing plan adopted is not the same

Secondly, the operator manually controls the lifting operation of the oxygen lance through the operating table. Due to the different operating skills and mental state of the operator, the accuracy of point blowing control is poor.

In addition, the operator calculates and records the point blowing time based on the time when the gun is lifted and the time when the oxygen lance is in place. Since the calculation accuracy of the operators is different, the accuracy of recording the point blowing data is not high.

Images