Method of manufacturing cement raw mix
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United States of America Patent
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-
Jul 26, 1983
Grant Date -
N/A
app pub date -
Jan 13, 1982
filing date -
Jan 13, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for the production of cement raw mix which takes into account variations which may occur in the raw materials being introduced into the raw mix, particularly such variations which occur in the limestone. The process disclosed involves the periodic adjustment in the estimated chemical composition of the raw materials used to produce the raw mix in response to the degree of divergence between the actual proportions (W.sub.i) of the raw materials mixed and the 'theoretical' proportions (T.sub.i) which theoretically would have generated the raw mix that was produced over the previous time interval. Based upon the revised estimated chemical compositions, the desired characteristics of the raw mix over the next specific subsequent interval are reselected to adjust the overall chemical composition of the raw mix towards the overall desired characteristics, while maintaining continuity in the raw mix being produced and avoiding undesirable fluctuations in the composition. The disclosed method incorporates the detection of weighfeeder malfunctions through the comparison of the degree of divergence for each raw material with selected maximum permissible divergences. Actual characteristics of the raw mix produced are estimated through the use of a time weight raw mix matrix.
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