竖炉是国外最早的一种焙烧球团装置,即所谓第一代球团焙烧装置。直到六十年代初期,国外球团矿几乎全部是用竖炉焙烧出来的,竖炉设备结构简单,基建投资省,材质无特殊要求,热效率高,单位耗热量低,经营费用少。初步计算,竖炉球团厂的单位投资约比其它两种方法分别低3.4～12.5%,虽然如此,但由于竖炉的单炉能力小,难 Shaft furnace is one of the earliest foreign roasting pellet plant, the so-called first-generation pellet roasting plant. Until the early 1960s, almost all pellets from foreign countries were roasted out of shaft furnaces. The equipment of shaft furnace was simple in structure, with no investment in capital construction and no material requirements. The thermal efficiency was high, the heat consumption per unit was low, and the operating expenses were low. Preliminary calculation, shaft furnace pellet plant unit investment about 3.4 ~ 12.5% ​​lower than the other two methods, though, but because of the single furnace furnace capacity is small, difficult