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我厂有一台用于KT35—10可锻铸铁退火用热处理锅。由于可锻铸铁回火升温温度高(920℃～960℃)保温时间长,整个工艺过程在90小时左右,对炉体结构及燃烧装置有着很高的要求。原来采用人工手烧加之炉体结构不合理,致使煤燃烧不充分,浓烟滚滚,尘雾弥漫,能源浪费严重,造成环境污染,铸件回火质量不好。仅此工序造成废品,每炉达18％,以全年生产14.4万件计,废品达2.6万件,价值3万多元。为此,决定对其改造,重新设计了退火炉,采用下饲式
I have a plant for KT35-10 malleable iron annealing with heat treatment pot. As the malleable iron tempering temperature is high (920 ℃ ~ 960 ℃) holding a long time, the entire process in about 90 hours, the furnace structure and combustion devices have high requirements. The original furnace with artificial hand plus the structure of the furnace unreasonable, resulting in inadequate combustion of coal, smoke billowing, diffuse dust and dust, serious energy waste, resulting in environmental pollution, casting tempering quality is not good. This process only caused waste, up to 18% per furnace to the annual production of 144,000 items, the waste reached 26,000, the value of more than 30,000 yuan. To this end, the decision to transform it, re-designed annealing furnace, the use of feeding