METHOD FOR CONTROLLING BASICITY OF SINTERED ORE

摘要

PROBLEM TO BE SOLVED: To quickly, accurately and automatically adjust the basicity of a product sintered ore to a target value by measuring the contents of SiO₂ and CaO in the product sintered ore, obtaining the basicity, deciding an evaluation point from the difference between the measured value and the target value and automatically correcting a CaO blending ratio. ;SOLUTION: Each of contents of SiO₂ and CaO in the product sintered ore in a sintered ore producing process is measured every prescribed period, and the basicity (CaO/SiO₂) is obtd. from these measured values, and a range distributed with the deviations obtained by subtracting the measured value from the target value, is divided into plural sections. An evaluation point according to a deviation range in a section is set in the each section, and an evaluation point table for the evaluation points is beforehand prepared. On the other hand, the content of SiO₂ and that of CaO in the product sintered ore in a sintered ore producing operation is measured in time sequenrially and the basicity is obtd. from the measured values of these contents at this time, and the deviation from the target value is obtd. The section of the deviation range, to which this deviation belongs, is obtd. from the evaluation point table, and the evaluation point corresponding to this section is imparted to the basicity, and by this method, the raw material blending ratio of the CaO source is automatically corrected to adjust the basicity of the product sintered ore.;COPYRIGHT: (C)1998,JPO