To provide a grain-oriented electric steel sheet having excellent coating characteristic and excellent magnetic characteristic even when MgO baked in rotary kiln is used for the main element of the annealing separating agent for a large-sized electric steel sheet coil.
When manufacturing MgO for the annealing separating agent of a grain-oriented electric steel sheet by using baked MgO obtained by the rotary kiln baking of magnesium hydroxide, (1) at least two kinds of baked MgO powder are mixed, (2) mixing is performed by adjusting the mixing ratio of the baked MgO according to ± deviation from the preset target value and/or the upper limit value of the permissible quantity, and (3) each target value is adjusted within a predetermined range, and the upper limit value of the permissible quantity is adjusted to be not exceeding each permissible upper limit value for MgO after mixing.
COPYRIGHT: (C)2005,JPO&NCIPI
Morito extension
Power
Makoto Watanabe
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Kiyoshi Kuruma
Suzuki Yoko
Takanashi Reiko