Alumina High Pressure Dissolving Temperature Object Model Identification

Abstract:

In the process of high pressure dissolving by Bayer process, High Pressure Digestion Slurry with temperature is the main factor which influencing the percentage of dissolved Al203. Research on temperature model of digesting rarely published; parameter setting and control difficult to achieve desirable effect. In the matlab platform, system identification method, according the output error model to identify model, finally determine the model of alumina High-pressure dissolving temperature model. The recognition results showed that: Step response curve of the second-order model is fitted basically with the online temperature trace which collected by alumina High-pressure digestion in ZHONG ZHOU BRANCH CHALCO, degree of fitting is 86.27%; Algebraic stability criterion verifies that: the root of the system equations are negative, it’s stable. The identification model is reasonable and effectual, provide models for parameter setting and control; improve the control accuracy and percentage of dissolved Al203, reduce energy consumption.

• Periodical: Advanced Materials Research (Volume 1055)
• Pages: 54-58
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1055.54
• Online since: November 2014
• Authors: Quan Jun Zhang, Yan Chen*, Hao Yue Huang, Lei Liu, Kuang Wei Zhang
• Keywords: Digestion Slurry with Temperature, Object Properties, OE Model, Pressure Digestion, System Identification

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