大型沸腾炉工艺设计关键参数的剖析

An analysis of key process parameters of large scale fluidized bed roaster

根据引进的大型硫铁矿制酸装置的技术和国内近期取得的成就，剖析了大型硫铁矿沸腾炉工艺设计关键参数。沸腾层操作气速，对于细粒的浮选矿，选择为１ｍ／ｓ左右，对于通过３ｍｍ筛网的小块硫铁矿或者浮选矿与小块硫铁矿的混合矿，可以选择为１５ｍ／ｓ左右；炉气的停留时间为１１ｓ；沸腾层高度提高；二次风量是总风量的０～３０％；风帽的小孔气速在７０ｍ／ｓ左右。

Abstract The key process parameters of large scale fluidized bed roaster of pyrite are analysed in light of introduced technology from abroad and resent achievement in China. Operation gas velocity through fluidized bed is selected at 1m/s for fine flotation concentrate and 1 5m/s for lump ore minus 3mm sieve mesh or mixed ore of flotation concentrate and lump ore. Resident time of gas in roaster is 11s. Fluidized bed is heightened. Second air amouts to 0～30% of the total gas flow. Gas velocity through blast cap hole is about 20m/s.