MULTI-STAGE POROUS PLUG

• Main Authors: JANG, Moon-Jin, CHA, Hyun-Min
• Format: Patent
• Language: English; French; German
• Published: 10.08.2022
• Subjects: BLASTING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; PERFORMING OPERATIONS; POWDER METALLURGY; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; RETORTS; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; WEAPONS

The present invention relates to a multi-stage porous plug, which overcomes limitations of product length and upper and lower part property deviation of the product since porous parts coming into contact with molten steel so as to inject gas therethrough are formed into multiple stages, enables the remaining porous part to be easily checked during hot rolling since the porous parts of each stage have different sizes and cross-sectional shapes, has effects of reducing workload and saving costs according to an increase in usage lifespan, has excellent operation stability by enabling the estimation of expected lifespan and safe remainder confirmation to be easily identified, and comprises: a upper porous part having a plurality of pores; a lower porous part having a plurality of pores and provided at the lower part of the upper porous part; a porous indicator part having a plurality of pores, provided at the lower part of the lower porous part, and having a cross section shape different from that of the lower porous part; and a sleeve part for encompassing the upper porous part, the lower porous part, and the indicator part.