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
胡中发
,
王学斌
,
王毅斌
,
邓双辉
,
李智锋
,
谭厚章
工程热物理学报
生物质燃烧释放的碱金属氯化物蒸气会在受热面上冷凝,并在烟气中SO2/O2/水蒸汽等共同作用下发生异相硫化反应,从而影响碱金属对受热面的腐蚀.本文利用固定床反应器研究了反应温度、停留时间、氯化物及SO2/O2/H2O等浓度等对固相KCl硫化的影响,实验结果表明:KCl非均相硫化的主要产物是K2SO4,在O2和H2O较低是KCl异相硫化较慢,KCl异相硫化速率随SO2/O2和H2O浓度增大而提高,随停留时间的延长呈线性递增,并随反应温度的升高呈指数关系升高.
关键词:
碱金属
,
硫化
,
SO2
,
KCl
,
生物质
