The invention discloses a method for controlling nodulation of a carbon blind
hearth roller. A transition steel coil does not enter into a high temperature furnace any longer when running speed of a high temperature furnace is more than or equal to 60m / min, surface of the high temperature furnace is seriously oxidized or the high temperature furnace runs for 15 times;
oil content and
iron content of alkaline washing alkaline liquor are controlled, and corresponding thermal compensation is carried out on rotating speed of a furnace roller according to temperature of
strip steel, thus linear speed of the furnace roller is maintained to be consistent with the linear speed of the
strip steel; alternate production of a high brand and a low brand is adopted, time for producing the high brand every time is not more than two days, and tension in the furnace is reduced when the high brand is produced; and the total air-fuel ratio of a non-oxidation furnace is controlled to be 0.92-0.98, a
dew point of furnace gas at a carbon blind section is controlled to be 30-35 DEG C,
hydrogen amount in a soaking pit furnace is controlled to be 16-20%, and
furnace temperature of a furnace section corresponding to a nodulated carbon blind is reduced by 30 DEG C, thus nodulation generating conditions are destroyed. By adopting the method disclosed by the invention, almost no nodulation can be realized, thus service life of the carbon blind is prolonged by two months, halt frequency of a
machine set and roller
grinding frequency can be reduced, productivity of the
machine set and surface quality of a steel plate are improved, consumption of
energy source and medium is reduced, and production cost is reduced.