Maintenance method of blast furnace liner

• Main Authors: GAO ZONGLAI, QIN CHUAN, WU RONGSHAN, LU XIAOXIN, FENG SHUXIONG, HE TIANJUN
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2010
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides a maintenance method of a blast furnace liner. The method comprises the following steps of: removing a fireproof liner and residential iron which are seriously corroded below a bosh so as to ensure that an area with the width not less than 500mm and an annular segment cross section is formed between a cooling wall of a blast furnace and the residential iron along the diameter direction of the blast furnace after the fireproof liner and the residential iron are removed; clearing floating dross remained due to the removal of the fireproof liner and the residential iron; laying bricks made from a new fireproof material in a horizontal bricking mode; and filling brick gaps among the fireproof bricks with mortar with the mortar plumpness not less than 95 percent to sequentially form a carbon material layer with the thickness from 80mm to 100mm and a fireproof brick layer with the thickness not less than 400mm between the cooling wall of the blast furnace and the residential iron along the di