Abstract: This paper introduced the structure and process mechanism of the cleaning section equipment of the silicon steel continuous annealing unit. Through process parameter optimization experiments and combined with EMG cleanliness detection experimental data, the influences of alkaline solution concentration, temperature, brush roller current and other parameters on cleaning quality were revealed. The research results show that when the temperature of the alkali solution is controlled at 60⁃80 ℃, the concentration at 2 %⁃5 %, the brush roller current at 9⁃11 A, the extrusion pressure at 2⁃4 MPa, the cleaning time at 10⁃30 s, and the spray beam angle at 45°, the surface fluorescence unit of the strip steel can be reduced to below 15 μW/cm2, effectively avoiding secondary problems such as furnace roller nodules, and providing reference for process optimization of similar production lines.

Key words: continuous annealing unit, cleaning section, process optimization, silicon steel surface cleanliness, electrolytic cleaning