Prediction of Al(OH)3 fluidized roasting temperature based on wavelet neural network

来源期刊:中国有色金属学报(英文版)2007年第5期

论文作者:李劼 刘代飞 戴学儒 邹忠 丁凤其

文章页码:1052 - 1052

Key words:wavelet neural networks; aluminum hydroxide; fluidized roasting; roasting temperature; modeling; prediction

Abstract: The recycle fluidization roasting in alumina production was studied and a temperature forecast model was established based on wavelet neural network that had a momentum item and an adjustable learning rate. By analyzing the roasting process, coal gas flux, aluminium hydroxide feeding and oxygen content were ascertained as the main parameters for the forecast model. The order and delay time of each parameter in the model were deduced by F test method. With 400 groups of sample data (sampled with the period of 1.5 min) for its training, a wavelet neural network model was acquired that had a structure of i.e., seven nodes in the input layer, twenty-one nodes in the hidden layer and one node in the output layer. Testing on the prediction accuracy of the model shows that as the absolute error ±5.0 ℃ is adopted, the single-step prediction accuracy can achieve 90% and within 6 steps the multi-step forecast result of model for temperature is receivable.

基金信息:the National Natural Science Foundation of China

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