Wide strip hot rolling mill runout roll table electric drive control system
The object for the research is the electric drive of the wide strip hot rolling mill runout roll table. The goal of the research is decreasing the operational loses spent on the roll table equipment. The means for reaching the goal are the developing of the roll table equipment diagnostic system and the improved algorithm for electric drive control system. In the article the description of the performed researches and the results of developed systems applying are present.
Advanced automation concept of runout table strip cooling for hot strip and plate mills
With their operational experience of the classical automation concept, SMS Demag AG have further developed theirs for the automation of cooling sections. An essential aspect is the use of the thermophysical process knowledge for setup calculation and for control during production. The cooling section is therefore regarded as a system through which unsteady energy flows. This system definition also allows the flexible use of the final control elements, since the temperature profile between the pyrometer of the finishing train and that of the coiler can be continuously calculated, i.e. observed during production and compared and controlled with a reference temperature profile. This has enormous advantages as the influence of process disturbances, e.g. by power speedup and speeddown, is effective simultaneously at each point within the cooling section. The advanced control concept combines proven model technology with new features that provide a high degree of flexibility concerning dynamically changing process parameters and transient conditions. In 1999 SMS Demag AG received two orders for runout-table cooling on the basis of the advanced automation concept.
Characterization of Aqueous Dispersions and Gels Made of Sodium Caseinate and Basil Seed Gum: Phase Behavior, Rheology, and Microstructure
The interactions between sodium caseinate (NaCas) and basil seed gum (BSG) in the presence of calcium chloride (CaCl 2 ) were investigated. The phase behavior of the mixed aqueous dispersions and their gels revealed a homogeneous mixture, obtained at the higher concentrations of both CaCl 2 and BSG. The Herschel-Bulkley model sufficiently fitted the flow behavior of the mixture solution data. Apparent viscosity increased significantly ( p  < 0.05) by increasing the concentration of BSG, where the addition of CaCl 2 had no significant effect on the viscosity of the samples ( p  > 0.05). Furthermore, there was an increase in thixotropy due to the higher concentrations of BSG and CaCl 2 . Based on the frequency sweep test, at the low frequencies, a more gel-like behavior was observed in the case of the higher concentrations of either BSG or CaCl 2 . The rheological and SEM data suggested that the stronger structure of NaCas-BSG gel in the presence of the higher concentrations of CaCl 2 was related to the induction of complex formation between the two biopolymers.