Monitoring method of heating time and heating temperature of heating furnace

Abstract

The invention relates to a monitoring method of the heating time and the heating temperature of a heating furnace on a hot rolling production line, and belongs to the field of automation of the metallurgical hot rolling production line. According to the technical scheme, the method comprises the following steps: reading steel billet ID (Identification) signals sent to PLC (Programmable Logic Controllers) at the first stage in the heating furnace continuously; establishing a tracking of steel billets in the furnace by tracking the positions of the steel billets on a roller bed outside the furnace; reading the position of each steel billet in the heating furnace every three minutes from a secondary database of the heating furnace and accumulating the reading results; calculating the heating time of the steel billets at each stage in the heating furnace; contrasting the heating time with a technological requirement and alarming if the heating time exceeds the time specified by the technological requirement; storing the PLC address of each thermocouple in the heating furnace in the secondary computer database of the heating furnace; reading an average value of the temperature at each stage in the heating furnace; and finally, contrasting the heating temperature with the technological requirement and alarming if the heating temperature exceeds the temperature specified by the technological requirement. With the adoption of the method provided by the invention, the occurrence of inferior-quality products caused by an incomplete phosphorus removal on the surface of strip steel due to the long heating time and the high heating temperature at each stage in the heating furnace is avoided; the oxidation burning loss rate is decreased; the yield is increased; the cost of the steel per ton is reduced; and therefore the economic benefit is improved.

Description

technical field [0001] The invention relates to a method for monitoring the heating time and temperature of a heating furnace of a hot rolling production line, and belongs to the field of heating process automation of a hot rolling production line in the metallurgical industry. Background technique [0002] At present, when the steel billet is heated in the heating furnace of the hot-rolled sheet factory in the metallurgical industry, the heating time of the billet in each section of the heating furnace is too long, and the heating temperature is too high. per ton of steel cost. If the operation is carried out in accordance with the established process standards, the operator cannot record the heating time and temperature of each billet in each section of the heating furnace, and cannot implement the heating process standard well, often causing the billet to be heated in the heating section and soaking section for too long If the heating temperature is too high, it will dir...

AI Technical Summary

Problems solved by technology

[0002] At present, when the steel billet is heated in the heating furnace of the hot-rolled sheet factory in the metallurgical industry, the heating time of the billet in each section of the heating furnace is too long, and the heating temperature is too high. The cost per ton of steel

If the operation is carried out in accordance with the established process standards, the operator cannot record the heating time and temperature of each billet in each section of the heating furnace, and cannot implement the heating process standard well, often causing the billet to be heated in the heating section and soaking section for too long If the heating temperature is too high, it directly increases the oxidation burning loss, which affects the cost per ton of steel. In addition, it will also cause the surface of the strip to be unclean, resulting in the appearance of secondary products and affecting product quality.

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