Az orlési folyamat energia-optimalizálása üzemi körülmények között

摘要

The efficiency of grinding is most determined by the speed of grinding, which depends on the particle size of the material, grindability as determined by the cohesion forces and the micro structure of the particles, the surface characteristics (tendency to adhesion) and moisture content of the resulting fine particles, as well as the type of stress subjected to the particles in the grinding machine (impact, abrasion...) and the stress intensity depending on the design and technological features of the grinding machine (specific rate of energy input). At the Felnémet limestone processing plant of OMYA Kft. grinding is performed using grinding mills featuring built-in wind sifters; additionally, hot air is supplied to the mill for drying. Therefore, electricity and natural gas, respectively, are used for grinding the limestone and keeping the moisture content of the end-product within the specified limits. Consequently, the total energy needed for grinding is determined by grinding and drying in correlation. The measurement model for the consumption of energy entering the grinding-grading-drying technological process is established based on a large number of experiments. Based on the design of the model and the evaluation of the measurements, a feed-forward control system can be established, which - making use of the major parameter data of the process - allows the automatic control of the volume of natural gas usage required for drying. [PUBLICATION ABSTRACT]