Blast furnace water wall production method using vanishing-die forging technique

Abstract

The invention relates to a method for producing a blast furnace water-cooling wall by using lost foam casting technique. Foam plastics is utilized to make the model of the lost foam of the blast furnace water-cooling wall, meanwhile, after a supporting pillar is welded on a simmered cooling water pipe of the blast furnace water-cooling wall and masking paste is brushed, the cooling water pipe is fixedly installed in the model of the lost foam of the blast furnace water-cooling wall, is treated with joint sealing, finishing, the painting of masking refractory coating, drying and ram-jolt by being arranged in a molding box, and is poured with molten metal with qualified smelting under a negative pressure state; and after cooling, box-opening, trimming and processing are carried out, the blast furnace water-cooling wall product produced by the lost foam casting technique is obtained. The method can be used for the production of the blast furnace water-cooling walls with the materials of gray cast iron, ductile cast iron, low carbon steel, micro-alloying low carbon steel, pure copper and the like, all the performances of the blast furnace water-cooling wall are better than those of the blast furnace water-cooling walls with the same material and casted by san mold, the use amount of the moulding sand can be reduced by 90 to 95 percent, the procedure is simplified, the labor productivity is improved, the working environment of the workers is improved, the labor intensity and operation technical difficulty of the workers are reduced, and the method has good economic and social benefits.

Description

Technical field: [0001] The invention relates to a method for producing a blast furnace water wall by using a lost foam casting process, and belongs to the field of metallurgical blast furnace water wall production. Background technique: [0002] Blast furnace is one of the most important equipment in metallurgical enterprises. Its operation is directly related to the output and quality of pig iron, as well as to the energy consumption and efficiency of the enterprise; the water wall of blast furnace is one of the most important process components of blast furnace, which directly affects the performance Safe production and service life. [0003] At present, more than 90% of blast furnace water walls used at home and abroad are cast blast furnace water walls. The materials used include gray cast iron, ductile iron, low carbon steel, micro-alloyed low carbon steel, pure copper, etc., all of which are produced by sand casting process. Compared with sand casting, lost foam cast...

AI Technical Summary

Problems solved by technology

Compared with sand casting, lost foam casting has the advantages of high dimensional accuracy, good appearance quality, less internal defects, improved labor efficiency, reduced labor intensity and operational technical difficulty, and recyclable molding sand. Low, light weight, low hardness, any slight tension and compression collision can make it deformed and damaged; and the blast furnace water wall cooling water pipe that must be pre-installed in it has high strength, heavy weight, and high hardness. During the process of handling and packing, it is very easy to cause damage to the lost foam model, and it cannot be cast into shape. Therefore, no one dares to use the lost foam casting process when casting the blast furnace water wall

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