Energy-efficient production of a ferritic hot-rolled strip in an integrated casting-rolling plant

An integrated casting-rolling plant for producing a ferritic hot-rolled strip by carrying out a process comprising:

• a continuous caster for continuously casting a liquid steel to give a first strip having a slab or thin slab cross section;
• a multipart roughing stand for prerolling the first strip to give an intermediate strip;
• at least one inductive surface heating module being configured for heating broad sides of the intermediate strip to a surface temperature of ≥1000° C., wherein the at least one surface heating module is heated by an alternating current having a first frequency f1;
• a descaling apparatus configured for descaling the broad sides of the heated intermediate strip;
• a multipart finishing stand configured for final rolling of the descaled intermediate strip to give a hot-rolled strip, wherein the descaled intermediate strip after descaling and without further cooling enters a first set of the finishing stand with an average temperature of 775-900° C. and at least a last rolling pass in the finishing stand takes place in a ferritic temperature range of ferritic steel;
• a cooling section configured for bringing the hot-rolled strip to coiler temperature, the cooling section having insulation panels between which the hot-rolled strip passes to thermally insulate the hot-rolled strip;
• a cutter downstream of the cooling section;
• and
• a coiler downstream of the cutter and configured for winding up the hot-rolled strip.