新型物位检测装置应用于高炉膨胀罐液位检测的可靠性探析

本文介绍了几种新型物位检测仪器的原理和特点,并着重探讨了在其在高炉膨胀罐液位检测应用中的准确性和可靠性。     

用喷涂铝涂层的方法来提高高炉风口使用寿命

通过无涂层风口与铝涂层风口的实践数据的计算和比较,得出结论:铝涂层风口可增强风口外套耐磨性,提高风口使用寿命;且降低焦比,减少风口表面热损失.     

Prediction model of permeability index for blast furnace based on the improved multi-layer extreme learning machine and wavelet transform

The permeability index of the blast furnace is a significant symbol to measure the smooth operation of the blast furnace. This paper proposes a novel prediction model for permeability index of the blast furnace based on the multi-layer extreme learning machine (ML-ELM), the principal component analysis (PCA) method and wavelet transform (called as W-PCA-ML-ELM prediction model). This modified ML-ELM algorithm is based on the ML-ELM algorithm and the PCA method (named as PCA-ML-ELM). The PCA method is applied on the ML-ELM algorithm to improve the algebraic property of the last hidden layer output matrix which deteriorates its generalization performance due to the high multicollinearity. Because the production data of the blast furnace field contain noises, this paper applies the wavelet transform to remove the noise. Comparing with other prediction models which are based on the ML-ELM, the ELM, the BP and the SVM, simulation results illustrate that the better generalization performance and stability of the proposed W-PCA-ML-ELM prediction model.     

Articulation and codification of collective know-how in the steel industry: evidence from blast furnace control in France

In this article, we use the implementation of an expert system to improve blast furnace control in the French steel industry to illustrate the problem of knowledge articulation/codification. Blast furnace related knowledge still largely takes the form of empirical know-how in general and expert know-how tied to specific individuals in particular. Therefore, the articulation/codification of knowledge in this field is a difficult task requiring the identification and selection of ‘best practices’ for the purpose of codification. This process, in turn, affects daily routines and creates new forms of generic knowledge that make use of local knowledge. These new forms of generic information reinforce the tendency to appropriate private knowledge currently prevailing in Usinor, a large French steel company, and create new routes and new insights for R&D policy.