Jingjing SONG
金属学报(英文版)
The reduction process of manganese dioxide in low-grade manganese ore by biomass roasting was investigated. The calcine of manganese oxide ore was further leached by sulphuric acid, the manganese in ore can be converted into manganese sulfate. Effects of the mass ratio of manganese ore to sawdust, roasting temperature and time, leaching temperature and time, leaching agent concentration and liquid-solid ratio were studied. 97.71 % of manganese recovery can be achieved under the optimal conditions: the mass ratio of manganese ore to sawdust of 5:1, roasting temperature at 500 ℃ for 40 min, leaching temperature at 60 ℃ for 40 min, sulphuric acid concentration of 1 mol/L and liquid-solid ratio of 10:1. Other types of low-grade manganese ore like Guilin ore, Nanning ore and Gongcheng ore were tested and the same results were obtained.
关键词:
Reduction roasting
,
biomass
,
sawdust
,
reduction roasting
王祖旭
,
汤优优
,
李楠
硅酸盐通报
随着富矿开采日渐枯竭,贫矿开发的重要性越发显著.本文以云南具有代表性的某硅酸盐型低品位铁矿为研究对象,对其进行了详细的工艺矿物学研究,并根据原矿性质特点进行选矿试验研究,分别进行了弱磁选以及弱磁尾矿的强磁选、摇床重选及还原焙烧—弱磁选等试验,并最终确定了弱磁选提磁铁矿和还原焙烧—弱磁选提赤铁矿、褐铁矿的选矿流程.通过两步磁选,获得的铁精矿平均铁品位为60.07％,铁回收率为74.35％.
关键词:
弱磁选
,
硅酸盐型
,
还原焙烧
