Abstract

Accurate control for burning through point (BTP) can not only make the sintering process stable but also use the sintering area effectively. The condition of BTP affects the sintering output and quality. Currently there are no instruments that can be used to measure BTP online. In this paper, the online judgment of BTP is researched. The math model will be built based on the relation of measurable variables with BTP to judge the BTP online. Quadratic curve is fitted according to three measured points including the highest waste gas in five windboxes at discharge end. Leading correction for inertia measuring elements is also taken. Based on the math model derived, a feedback correction of BTP by bringing in the temperature of waste gas in flue is needed duo to air leakage at discharge end to ensure the accurate of BTP judgment. In the paper an application of soft measuring technique of BTP is introduced. Digital filter algorithm suitable to inertia and slow time-various characteristics of temperature is also introduced

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