PLASMA HEATING BLAST AIR

• Main Authors: ARIF MUHAMMAD REHAN, CAMERON IAN ARCHIBALD, HYDE JOHN BARRY, PATEL NISHI NARENDRA, SUKHRAM MITREN, BUSSER JOHN
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2019
• Subjects: BLASTING; 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; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LIGHTING; MANUFACTURE OF IRON OR STEEL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; OPEN SINTERING OR LIKE APPARATUS; OVENS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; RETORTS; TRANSPORTING; WEAPONS

A modified air mixer heats mixing air to an elevated temperature using plasma heating torches retrofitted to an air mixer in a blast furnace system. The plasma heated air is mixed in the hot blast main with heated air from hot blast stoves to increase the temperature of mixed blast air prior to delivery to the blast furnace. Conveniently, the air delivered to the blast furnace can be at a temperature equal to or greater than the highest air temperature that the hot blast stoves can technically produce. The air temperature can be increased to the maximum design temperature of the hot blast airrefractory system (from stove exit to tuyere discharge). The increased hot blast air temperature delivered to the blast furnace may be seen to reduce coke rate, allow increased fuel injection, increase blast furnace productivity and reduce CO2 emissions. 种改型的空气混合器使用等离子炬将混合空气加热到升高的温度，该等离子炬改装到鼓风炉系统中的空气混合器。等离子加热空气在热鼓风总管中与来自热鼓风炉的加热空气混合，以在被递送到鼓风炉之前提高混合鼓风的温度。便利的是，被递送到鼓风炉的空气的温度可以等于或高于热鼓风炉从技术上来说可生成的最高空气温度。可将空气温度提高到热鼓风耐火系统(从热鼓风炉出口