目前,铸锅行业大多采用古老的搀炉化铁。这种炉型由于炉身短、预热区短(见图1),炉料在炉内预热不充分。因而,热能的有效利用率很低。据测定其热利用率仅21.2%,其中炉气带走的热占总发热量的63.7%,炉气化学不完全燃烧损失严重。加料口处炉气成分:CO_2:8.58%,CO:23.68%,其燃烧比仅26.6%。炉顶火焰温度1,045℃,烟气温度720℃,入炉焦铁比1∶5,成品焦铁比1∶3.31。焦炭的浪费是 At present, most of the cast pot industry uses the ancient adulteration of iron. This furnace due to short furnace body, preheating zone is short (see Figure 1), the charge in the furnace preheating inadequate. Thus, the effective utilization of thermal energy is low. According to the determination of its thermal utilization rate of only 21.2%, of which furnace heat away from the total heat of 63.7%, furnace gas chemical incomplete combustion of a serious loss. Furnace gas composition at the feed inlet: CO 2: 8.58%, CO: 23.68%, the combustion ratio of only 26.6%. Top flame temperature of 1,045 ℃, flue gas temperature of 720 ℃, into the furnace coke iron ratio of 1: 5, finished iron and iron ratio of 1:3.31. Coke waste is