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我国8m~2的氧化球团竖炉(以下简称竖炉)年产量已达三十多万吨.随着竖炉产量的提高,排出球团矿的温度升高,如杭州钢铁厂竖炉的排矿温度在500～600℃以上,每吨成品球团矿带走的物理热达十万大卡以上(见表1),为竖炉总热收入的40%左右.这部分热量目前尚未回收利用,是能源的一大浪费.由于排矿温度高,成品球团矿运输设备复杂、寿命低、劳动条件不好,影响竖炉的正常生产.因此,降低竖炉的排矿温度是目前急待解决的问题.
China’s annual output of 8m ~ 2 oxidation pellet shaft furnace (hereinafter referred to as shaft furnace) has reached more than 300,000 tons.With the increase of shaft furnace output, the temperature of pellets discharged increased, such as Hangzhou Steel Factory shaft furnace Exhaust temperature above 500 ~ 600 ℃, the physical heat per tonne of finished pellets to take away more than one hundred thousand kcal (Table 1), about 40% of the total shaft heat revenue.This part of the heat has not yet recovered Use, is a big waste of energy.Due to the high temperature of the discharge, finished pellet transport equipment complex, low life expectancy, poor working conditions, affecting the normal shaft furnace production.Therefore, to reduce the shaft furnace discharge temperature is urgent Problem to be solved.