A Method for Eliminating the Blind Area of ​​the Slab Entering the Furnace

Abstract

The invention discloses a method for eliminating the blind area of ​​a slab entering a heating furnace, and relates to the field of metallurgical heating furnace equipment. On the basis of the existing large-range pyrometer, a small-range pyrometer is installed around the slab checking position, and a large-range pyrometer is installed. The temperature range of the pyrometer is 300-1300°C, and the temperature range of the small-range pyrometer is 0-400°C; the signals of the large-range pyrometer and the small-range pyrometer are connected to the PLC system, and the readings of the two pyrometers are compared Finally, the PLC system selects the appropriate pyrometer for data processing, calculation and sending to the secondary system of the heating furnace. The secondary system of the heating furnace accurately calculates the target model temperature according to the received temperature. The invention is mainly devoted to reducing the combustion cost of the heating furnace, improving the economic benefit and improving the viability of the enterprise.

Description

technical field [0001] The invention relates to the technical field of metallurgical heating furnace equipment, in particular to a method for eliminating the blind area of ​​a slab entering a heating furnace. Background technique [0002] With the increasingly fierce competition in the steel market, iron and steel enterprises must reduce costs in order to improve economic efficiency and improve viability. In the existing design scheme, after the slab is checked, the temperature is measured by the ICON pyrometer, and the temperature is sent to the secondary system of the heating furnace, so as to judge whether the slab is a high-temperature slab, and thus calculate the time in the furnace of the slab . However, the pyrometer has defects. The measurement range is 300-1300°C. When the temperature is below 300°C, the system automatically assumes that the slab temperature is room temperature. However, in the production process, about 14% of the billets have a temperature of aro...

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Problems solved by technology

However, in the production process, about 14% of the billets have a temperature of around 250°C during batch hot charging. This secondary calculation will default the furnace charging temperature to 30°C. During the heating process, the actual temperature of the billets is higher than the calculated temperature, which is not only invisible The time of the slab in the furnace is increased, which affects the output, and increases the gas consumption, wasting energy

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