Intelligent sintering mixed water adding control method with prediction function

Abstract

The invention relates to an intelligent sintering mixed water adding control method with a prediction function. Different control modes are used for primary mixing and secondary mixing. The primary mixing uses a feed-forward control mode with an identification and prediction function, and the secondary mixing uses a feed-forward feedback composite control mode. The method has the advantages that controllers are designed according to respective characteristics of the primary mixing and the secondary mixing of sintering; during the primary mixing, system interference is reduced, and the control accuracy is increased through the identification of the water content before mixing, and during the secondary mixing, and water adding control is stable through feed-forward feedback composite control. The method is high in applicability and transportability and can be widely applied to sintering production lines.

Description

technical field [0001] The invention relates to an intelligent sintering mixing water adding control method with a predictive function, which is used for the automatic water adding control of the mixer of the sintering production line, so that the granulation of the mixing machine is uniform and good air permeability is ensured. Ore mixing and water control. Background technique [0002] The effect of mixing and adding water plays a large role in sintering production. It not only affects the vertical sintering speed, but also affects the yield of sintered ore, production efficiency and drum index of sintered products. If the moisture in the mixture is small, the sintering speed is fast, but the yield is low, the amount of ore returned is large, and the drum index decreases; if the moisture in the mixture is large, the sintering speed is slow, the productivity is low, and various consumptions are increased. If the sintering humidity control is unstable, it will cause freque...

AI Technical Summary

Problems solved by technology

If the moisture in the mixture is small, the sintering speed is fast, but the yield is low, the amount of ore returning is large, and the drum index decreases; if the moisture in the mixture is large, the sintering speed is slow, the productivity is low, and various consumptions are increased.

If the sintering humidity control is unstable, it will cause frequent adjustment of the parameters of the sintering machine and other subsequent posts, resulting in instability of the production line

[0003] In order to stabilize the water addition process, the current mixing and adding water generally adopts a two-time mixing process plan, but even so, there are still certain difficulties in the stability and accuracy of the water content of the mixture.

The main reasons are: there is a system lag of three to five minutes in general mixers, which makes the feedback control unable to be timely; If there is no mixing, even if there is a detection instrument, the measurement will not be accurate, etc.

[0004] Due to the above problems, most domestic sintering plants currently use manual control for mixing and adding water, which not only increases the workload, but also cannot guarantee the accuracy.

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