PROCESS FOR THE HEAT TREATMENT OF STEEL STRIPS IN A CONTINUOUS FURNACE WITH OXY-FUEL BURNERS

摘要

The invention relates to a process for the heat treatment of steel products, in particular of steel strips or sheets, in which the product is brought from a starting temperature to a target temperature in a booster zone (6, 7, 8) having at least one burner. The burner is operated with a fuel, in particular a fuel gas, and an oxygen- containing gas which contains more than 21% oxygen (oxy-fuel burner). The product is brought into direct contact with the flame generated by the burner, the air ratio lambda within the flame being set as a function of the starting temperature and/or the target temperature of the product. The burners are adjusted so that the flame surrounds the product over its entire periphery transversely to the conveying direction. Thus, the products are heated uniformly with a precisely controlled oxidation degree.