Method for spreading ceramic protection layer on blast furnace tuyere surface by utilizing self-propagation

• Main Authors: SUN ZHONGQIANG, FENG XIN, LU CAIYUN
• Format: Patent
• Language: Chinese; English
• Published: 03.06.2009
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

The invention relates to a method for spreading a ceramic protection layer on a blast furnace tuyere surface by utilizing self-propagation, which comprises the steps as follows: surface abrasive blasting is carried out, and aluminium powders and copper oxide powders are mixed up, and then are put in a baking box or a box type resistance furnace to be dried for 5 to 12 hours; then the part of a tuyere small sleeve to be coated with ceramic powders is thinned 3 to 5mm; 3 to 15 circles of heating resistance wires are evenly fixed inside a tuyere along the direction parallel or vertical to the tuyere; the dried aluminium powders and the copper oxide powders are evenly mixed with a caking agent of 2 to 6wt percent, then the mixed powders are confected into a paste which is evenly coated on the tuyere surface that is processed through superficial treatment, and igniter powders that is potassium chlorate of 3 to 5g are added to a certain part of the coated powders in a concentrative manner; and the resistance wires