Method for determining the time of hot rolling heating stove bar plate leavings in furnace

Abstract

The invention discloses an affirming method of residual time of hot-rolled heater slab in the furnace, which comprises the following steps: calculating extracting interval of slab in the furnace through combined prediction model of slab extracting interval according to the length, product breadth and product thickness of slab in the furnace and the length, product breadth, thickness and hardness grade of slab; fusing the extracting time with present timely extracting time; indexing from extracting end according to the present position of each segment length of heater and slab and the length from slab to end; accumulating the extracting interval of slab within index scale to calculate; affirming the residual time of slab in the furnace or segment; fitting automatically; repairing the residual time to predict the temperature of slab precisely. The invention can control the temperature of heater precisely to make the slab reach the regulated goal temperature, which is benefit to improve the temperature control level of slab in the heater and heating quality of slab with low energy consumption.

Description

technical field [0001] The invention relates to forming processing of hot-rolled steel, and more specifically refers to a method for determining the remaining time of a hot-rolled heating furnace slab in the furnace. Background technique [0002] There are two main goals of hot rolling heating furnace production. One is to provide slabs that meet the quality requirements of the heating furnace for subsequent processes; the other goal is to coordinate with the rolling line and meet the rolling rhythm requirements of the rolling line. The latter goal is to determine the optimal slab extraction rhythm of the heating furnace, and the former goal is to control the heating temperature of the slab. These two goals are interrelated. A key variable in the control of the slab heating temperature is the remaining time of the slab in the furnace. The automatic combustion control model uses the remaining time of the slab to calculate and determine the furnace temperature. The gas temper...

AI Technical Summary

Problems solved by technology

Since the remaining furnace time of the slab in the heating furnace is calculated according to the current steel-drawing rhythm and the rolling sequence, when the steel-drawing rhythm changes, the remaining furnace time will inevitably change, so that the actual furnace time of the slab The time is inaccurate, which also makes the setting of the furnace gas temperature inaccurate

[0006] Therefore, there are problems in the methods currently used. They cannot accurately calculate the remaining time of the slab in the heating furnace, so they cannot be well adapted to hot rolling production. It is necessary to find a new method for determining the remaining time of the slab in the heating furnace. Solve the above problems and meet the needs of hot rolling production

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