Effectiveness of sodium silicate as gangue depressants in iron ore slimes flotation

被引：0
作者：
Danda Srinivas Rao [1 ]
Tadiparthi Venkata VijayaKumar [1 ]
Sripada Subba Rao [1 ]
Swarna Prabhakar [1 ]
Guntamadugu Bhaskar Raju [1 ]
机构：
[1] National Metallurgical Laboratory-Madras Centre,Council of Scientific and Industrial Research-Madras Complex,Chennai 600 113,India
来源：
International Journal of Minerals Metallurgy and Materials | 2011年 / 18卷 / 05期
关键词：
iron ores; sodium silicate; depressants; flotation;
D O I：
暂无
中图分类号：
TD951 [黑色金属矿选矿];
学科分类号：
081902 ;
摘要：
The recovery of iron from the screw classifier overflow slimes by direct flotation was studied.The relative effectiveness of sodium silicates with different silica-to-soda mole ratios as depressants for silica and silicate bearing minerals was investigated.Silica-to-soda mole ratio and silicate dosage were found to have significant effect on the separation efficiency.The results show that an increase of Fe content in the concentrate is observed with concomitant reduction in SiO2 and Al2O3 levels when a particular type of sodium silicate at a proper dosage is used.The concentrate of 58.89wt% Fe,4.68wt% SiO2,and 5.28wt% Al2O3 with the weight recovery of 38.74% and the metal recovery of 41.13% can be obtained from the iron ore slimes with 54.44wt% Fe,6.72wt% SiO2,and 6.80wt% Al2O3,when Na2SiO3 with a silica-to-soda mole ratio of 2.19 is used as a depressant at a feed rate of 0.2 kg/t.
引用
收藏
页码：515 / 522
页数：8
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