摘要
分别采用酸浸、生物浸出方法,对鄂西某高磷铁矿石(铁品位43.50%,磷含量0.85%)进行湿法浸出脱磷实验研究。试验结果表明:当矿浆浓度为2%时,100ml单一的0.1mol/L草酸(C2H2O4)、柠檬酸(C6H8O7)、H2SO4、HNO3、HCl中,无机酸提铁降磷效果优于有机酸。其中,H2SO4的提铁除磷效果最佳,处理后矿石铁品位为49.08%,铁回收率为99.57%,除磷率为93.91%;草酸与柠檬酸的混合酸浸矿中,在混合比例介于100∶0～20∶80之间时,提铁除磷效果较好;当矿浆浓度低于5%时,单一硫酸浸出后矿石中的磷含量为0.18%;采用At.f菌和黑曲霉菌进行微生物浸矿除磷,浸出后固体中磷含量分别为0.25%、0.22%。
Acid leaching,bioleaching were used to remove phosphorus from a high-phosphorus iron ore in western Hubei（iron grade 43.50%,phosphorus content 0.85%） .The results showed that：under the condition of 2%pulp density,with 100ml single 0.1mol/L of oxalic acid（C2H2O4） ,citric acid（C6H8O7） ,H2SO4,HNO3,HCl,the inorganic acid was better than organic acid,in which H2SO4was the most effective,and the iron grade,recovery,and phosphorus removal rate were 49.08%,99.57%,and 93.91%,respectively;in the mixed acid leaching of oxalic acid and citric acid,with the ratio between the range of 100∶ 0～20∶80,the phosphorus removal rate was accepted;when the pulp density was less than 5%,with the sulfuric acid leaching,the phosphorus content in the treated ore was 0.18%;In the bioleaching tests,the pulp density was 2%,with the Acidophilic Thiobacillus ferrooxidans（At.f） and the Aspergillus niger to treat the iron ore,the phosphorus content was reduced to 0.25%and 0.22%,respectively.
出处
《中国矿业》
北大核心
2010年第9期78-81,共4页
China Mining Magazine
基金
国家"十一五"支撑计划项目(2007BAB15B01)
国家重点基础研究发展计划"973"项目(编号:2004CB619204)
武汉理工大学自主创新研究基金在校研究生创新研究项目
关键词
高磷铁矿石
酸浸
生物浸出
除磷
high phosphorus iron ore
acid leaching
bioleaching
dephosphorization
