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doi: 10.1177/002029407100400503pmid: N/A
Rod and bar has been rolled for many years without the benefit of any form of gauging beyond the holding of a piece of wood against the moving stock. Quality control at present depends on retrieving processed material after cooling and using micrometer measurements to make mill adjustments. Valuable time is lost before any alteration in mill parameters is revealed and setting up is time consuming without rapid feedback of rolled diameter. Furthermore, any form of gauge control is not possible without the rapid determination of the diameter and profile of rolled material. The driving force behind automatic control of rod and bar mills and the considerable loss of revenue incurred by wastage of stock and in setting-up time has driven many investigators to examine ways and means of measuring rod and bar diameters. Over the past two years many schemes have been evaluated and some instruments will be commercially available shortly. This paper seeks to review the more interesting developments that have taken place in this area over the past two years.
doi: 10.1177/002029407100400504pmid: N/A
The accent on centralised control has led to a considerable reduction in panel length by the use of high density instrumentation. Condensing the panel length introduces the problem of mounting back of panel equipment in a much reduced area. Several designs of control panels have been developed within the process industry and the paper reviews the various answers to this problem. One particularly successful integrated design is described and includes development, layout, fabrication, shop testing, transport, installation, maintenance and control house layout. The paper concludes with various improvements and innovations for the future and the impact of integrated panel design on manufacturers and users.
Schuy, Klaus D.; Reinhold, Bodo
doi: 10.1177/002029407100400505pmid: N/A
Advantages of applying mass spectrometry to the analysis of process gases in the iron and steel industry are:Only one instrument is required for the analysis of all process gas components of interest;These components are simultaneously and quantitatively analysed;The analysis speed is the same for all components, and is extremely high;The signal produced by any one gas component is linearly proportional to the concentration of that component;For complete analyses, the analyser requires very small amounts of sample and calibration gas;The gas analyser can also be used to check the calibration gases for impurities and to control their concentration ratios.After a brief discussion of mass spectrometer principles and instrumentation, some typical applications of mass spectrometer-based gas analysis systems as applied to the iron and steel industry are elucidated. The incorporation of a digital mini-computer results in an integrated, autonomous process gas analysis system, containing sampling and handling facilities, gas analyser, calibration setup and TTY data printout.
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