The furnace is used to do the inoxidized anneal for the CQ and DQ steel roils, horizontal: 15 t/year; vertical: 20 t/year, 30t/year etc. The largest demission in vertical furnace is 22*9*23 m, more than 10000 KW. The furnace is high-tech and automatized, excellent in transferring, temperature control and holding, and is the important equipment.