A method for positioning slabs according to steel grades and finished product specifications

Abstract

The invention discloses a method for positioning for plate blank distribution according to the steel type and the finished product specification. The method is characterized in that plate blanks reaching a feeding checking roller way are subjected to secondary position positioning based on three indexes of thickness, hardness and steel type of the plate blank before entering corresponding rollingpositions according to a distribution graph meeting process requirements. According to the method, the secondary position positioning mode is adopted for three situations correspondingly, the positions of the plate blanks are further refined on the basis of previously following the distribution graph meeting the process requirements so that the parameters such as the different steel types and thefinished product specifications can be flexibly adapted to the plate blank distribution of a plate blank furnace of a heating furnace.

Description

technical field [0001] The invention belongs to the field of automatic control of metallurgical steel rolling, and in particular relates to a method for positioning slabs according to steel types and product specifications. Background technique [0002] In terms of slab distribution in traditional heating furnaces, the distribution model of the slab is made according to the distribution of the water beams and the length of the slab, which is realized through the L1 basic automation. The traditional distribution method is "cross" positioning, which is conducive to the symmetrical distribution of the airflow on both sides of the heating furnace, but because the positioning of the slab is always "cross" changes, it brings the temperature instability of the head. The problem is that the temperature of the previous slab entering the head of the rolling mill is 1020°C, and the temperature of the next slab entering the head of the rolling mill may be 1060°C or 980°C. This jump in h...

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Problems solved by technology

[0010] In order to solve the problem of unstable rolling of slabs caused by temperature fluctuations, and avoid the phenomenon of slab deviation caused by uneven force on the walking beam caused by the distribution of materials on the same side of the slab, the present invention aims at 1. To ensure rolling stability, the need The temperature at the end of slabs from different heating furnaces and the same heating furnace is consistent; 2. For slabs with higher strength and higher heating temperature, there is a phenomenon of large temperature drop at the tail; 3. For special steel types, such as silicon steel For slabs with strict temperature uniformity requirements, the temperature uniformity in the entire length direction is guaranteed; in consideration of the above three aspects, before the specific slab position is issued according to the layout drawing of the process requirements, the process control machine will control the slab. For the secondary position positioning of the above three situations, the positioning of the slab position is further refined on the basis of the previous layout diagram according to the process requirements, so that it can meet the parameters such as different steel types and finished product specifications. Flexible adaptation of materials

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