摘要
鲁南矿业有限公司铁矿石系鞍山式贫磁铁矿,现场生产反浮选尾矿品位达27%,以磁铁矿形式存在的铁占76.54%,存在回收的可能性。采用磁选—反浮选工艺对现场浮选尾矿进行再选试验,结果表明:在再磨细度为-0.043 mm占90%、磁场强度为110 k A/m时,可以得到铁品位为44.36%的磁选精矿,将其作为反浮选的给矿,在浮选温度为35℃,粗选Na OH用量为800 g/t、淀粉为700 g/t、Ca O为300 g/t、MD-27为300 g/t、矿浆浓度为40%时,经1粗1精2扫闭路反浮选,得到的精矿铁品位为62.39%、回收率为49.36%,满足了公司对铁精矿品质的要求,可以作为现场流程改造的依据。
Iron ore in Lunan Ming Co. ,Ltd. belongs to Anshan type lean magnetite. Iron grade of on-site reverse flotation tailings is 27%,76. 54% of which exists in form of magnetite,and can be recycled. Magnetic separation and reverse flotation technology for reconcentrationt of flotation tailings was conducted. The results indicated that at the regrinding fineness of 90%passing 0. 043mm and magnetic field intensity is 110 kA/m,magnetic concentrate with iron grade of 44. 36% is obtained and be treated as flotation feedings. Iron concentrate with iron grade of 62. 39% and recovery of 49. 36% was received at reverse rough flotation temperature of 35 ℃,NaOH dosage of 800 g/t,starch of 700 g/t,CaO of 300 g/t,MD-27 of 300 g/t,pulp den-sity of 40%,through one roughing-one cleaning-two scavenging closed cirouit reverse flotation process. The experiment results can meet the requirements of iron concentrate,and provide technique basis for transformation of dressing plant.
出处
《金属矿山》
CAS
北大核心
2015年第6期175-179,共5页
Metal Mine
关键词
尾矿再选
磁选
反浮选
Flotation tailings
Magnetic separation
Reverse flotation
