Control method for slow strip steel cooling of heat treatment furnace

Abstract

The invention relating to the technical field of metallurgy discloses a control method for slow strip steel cooling of a heat treatment furnace. On the premise of slow cooling temperature control, themethod comprises: matching controlling of different steel types of strip steels and fan output powers is carried out; matching controlling of a processing speed and an electric heating output power is carried out; and the slowing cooling outlet board temperature is kept to be unchanged and the strip steel temperature is controlled to be in a lower limit region of a slowing cooling outlet board temperature process index. Therefore, the slowing cooling outlet strip steel temperature is in a stable state all the time during running of different steel types of strip steels at different processingspeeds; and the process index is controlled to be in a lower limit region, so that the fan and the electric heating output powers are minimized and the electric consumption cost is saved.

Description

Technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for controlling the slow cooling of strip steel in a heat treatment furnace. Background technique [0002] The heat treatment furnace of the oriented silicon steel stretching and flat coating treatment line is designed with a slow cooling section. The slow cooling has both electric heating exchange and water-cooling exchange structure. The heating or cooling bypass is automatically selected according to the furnace temperature control. Cool down. [0003] However, in the process of implementing the technical solutions in the embodiments of the present invention, the inventor of the present application found that the foregoing prior art has at least the following technical problems: [0004] In the prior art, due to certain defects in the furnace temperature control, the circulating fan and the electric heating bypass electric heating output are always in the full load output ...

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Problems solved by technology

[0005] The embodiment of the present invention provides a method for controlling the slow cooling of the heat treatment furnace strip to solve certain defects in the prior art due to the furnace temperature control, so that the output of the circulating fan and the electric heating bypass electric heating is always in a full-load output state , which leads to a large temperature difference of the slow cooling exit strip steel plate. If the temperature is too low, the process index cannot be reached, and the technical problem of wasting energy if the temperature is too high, realizes the slow cooling exit strip steel temperature when different steel types and different process speeds are running. Always in a stable state, control the process indicators in the lower limit area, minimize the output power of fans and electric heating, and save the technical effect of power consumption costs

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