8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Hearth and high heat load region are key factors affecting the campaign life of blast furnace, mainly for the erosion of carbon bricks lined on furnace bottom and hearth and damaged of cooling equipment of high heat load region. In this paper, the long life of high heat load region was studied. And the new furnace longevity technology in the area was developed, which was combined cooling structure of cast iron cooling stave inlaid with copper cooling strips. It puts forward the design concept of bosh region of thin-wall furnace, and introduces the application of the new technology in two domestic 1080m3 blast furnaces .The practice showed that the technology had the characteristics of large cooling strength and stability of slag skin benefited from special structural design, which can effectively solve the problem of cooling equipment damage in the area of high heat load of the furnace. In addition, it has low investment and wide adaptability. As a new technology of long campaign life of blast furnace, it can effectively prolong the life of blast furnace, and has broad application prospects.